Rib-Type Waveguide Silicon Modulators And Optical Devices

A ring optical modulator includes a SOI substrate, including at least first and second top silicon layers, and a silicon-based ring resonator formed on the SOI substrate. The silicon-based ring resonator includes first and second top silicon layers, a thin dielectric gate layer disposed between the top silicon layers, first and second electric contacts, and first rib-type waveguide and ring-shape rib-type waveguide formed on the second top silicon layer. The thin dielectric layer includes a first side in contact with the first top silicon layer and a second side in contact with the second top silicon layer. With electric signals applied on the electric contacts, free carriers accumulate, deplete or invert within the top silicon layers on the first and second sides of the thin dielectric gate layer beneath the ring-shape rib-type waveguide, simultaneously, and a refractive index of the ring-shape rib-type waveguide confining optical fields is modulated.

Compensated photonic device structure and fabrication method thereof

Various embodiments of a compensated photonic device structure and fabrication method thereof are described herein. In one aspect, a photonic device may include a substrate and a functional layer disposed on the substrate. The substrate may be made of a first material and the functional layer may be made of a second material that is different from the first material. The photonic device may also include a compensation region formed at an interface region between the substrate and the functional layer. The compensation region may be doped with compensation dopants such that a first carrier concentration around the interface region of function layer is reduced and a second carrier concentration in a bulk region of functional layer is reduced.

Production method of low-carbon nitrided ferrochrome

The invention discloses a production method of low-carbon nitrided ferrochrome by micro-vacuum and micro-positive pressure sintering. The production method includes firstly, producing reduced-carbon ferrochrome powder by high carbon ferrochrome, making blocks from the high carbon ferrochrome powder and oxidized reduced-carbon ferrochrome powder, sintering at micro-vacuum and nitriding under micro-positive pressure in a micro-vacuum sintering reaction furnace to finally obtain low-carbon nitrided ferrochrome alloy. By the production method, high-quality nitrided ferrochrome is produced with low-price materials under normal pressure and low temperature, and accordingly consumption of nickel is replaced by a great amount of low-carbon nitrided ferrochrome during smelting of stainless steel, and steelmaking cost is further reduced.

Shuttle vector capable of transforming multiple genera of cyanobacteria

A plasmid vector for the production of compounds in cyanobacteria is described which is capable of being efficiently transformed to and replicating in a broad range of cyanobacterial species.

Integrated lens-array-on-substrate for optical coupling system and fabrication method thereof

An integrated optical coupling device may include a substrate, a coating layer disposed on the substrate, and a prism disposed on the coating layer. The prism may include a first surface and a second surface. The integrated optical coupling device may also include a first lens disposed on the first surface of the prism, a second lens disposed on the second surface of the prism, and an anti-reflection coating layer disposed on the first lens and the second lens.

Cyanobacterium sp. host cell and vector for production of chemical compounds in cyanobacterial cultures

A genetically enhanced cyanobacterial host cell, Cyanobacterium sp. ABICyanoI, is disclosed. The enhanced Cyanobacterium sp. ABICyanoI produces a compound or compounds of interest.

Integrated lens-array-on-substrate for optical coupling system and fabrication method thereof

An integrated optical coupling device may include a substrate, a coating layer disposed on the substrate, and a prism disposed on the coating layer. The prism may include a first surface and a second surface. The integrated optical coupling device may also include a first lens disposed on the first surface of the prism, a second lens disposed on the second surface of the prism, and an anti-reflection coating layer disposed on the first lens and the second lens.

Integrated Lens-Array-On-Substrate For Optical Coupling System And Fabrication Method Thereof

An imprinting method for forming an integrated optical coupling device on wafer level may include: providing a substrate, with a reflection coating disposed thereon; providing an imprinting mold, with void regions shaped according to a designed lens profile; forming a molding material on the substrate; pressing the imprinting mold on the molding material on the substrate; curing the molding material into a cured molding material; removing the imprinting mold; depositing an anti-reflection film on the cured molding material; and dicing to form an integrated optical coupling device. 1. An imprinting method for forming an integrated optical coupling device on wafer level , comprising:providing a substrate, with a reflection coating disposed thereon;providing an imprinting mold, with void regions shaped according to a designed lens profile;forming a molding material on the substrate;pressing the imprinting mold on the molding material on the substrate;curing the molding material into a cured molding material;removing the imprinting mold;depositing an anti-reflection film on the cured molding material; anddicing to form an integrated optical coupling device.2. The imprinting method of claim 1 , wherein the substrate comprises a glass substrate claim 1 , a silicon substrate claim 1 , a silicon-on-insulator substrate claim 1 , a silica substrate claim 1 , a sapphire substrate claim 1 , a gallium-arsenide substrate claim 1 , or an indium-phosphide substrate.3. The imprinting method of claim 1 , wherein a material of the imprinting mold comprises silicon claim 1 , tungsten carbide claim 1 , silicon carbide claim 1 , silicon nitride claim 1 , titanium carbide claim 1 , tungsten-cobalt alloy carbide claim 1 , sapphire claim 1 , or a combination thereof.4. The imprinting method of claim 1 , wherein a material of the molding material comprises polymer claim 1 , resin claim 1 , polyimide claim 1 , epoxy claim 1 , or a combination thereof.5. The imprinting method of claim 1 , ...

Low Return Loss Package Structure Of Silicon Photonics With Edge Coupler For DFB Laser Package With Len And Isolator

A compact and highly efficient coupling structure for coupling between DFB-LD and Si PIC edge coupler with suppressed return loss may include a DFB-LD, a Si PIC comprising at least one input edge coupler and at least one output edge coupler, a silica cover lid disposed on the Si PIC and aligned edge to edge with the Si PIC, a single-mode fiber aligned to the at least one output edge coupler of the Si PIC, a lens disposed between the DFB-LD and the at least one input edge coupler of the Si PIC, and an isolator bonded to a facet of the at least one input edge coupler with a first volume of an index matching fluid. The lens may be configured to minimize a mismatch between an output spot size of the DFB-LD and a spot size of the at least one input edge coupler of the Si PIC. 1. An optical package structure , comprising:a distributed feedback laser diode (DFB-LD);a silicon photonic integrated-circuit chip (Si PIC) comprising at least one input edge coupler and at least one output edge coupler;a silica cover lid disposed on the Si PIC and aligned edge to edge with the Si PIC;a single-mode fiber aligned to the at least one output edge coupler of the Si PIC;a lens disposed between the DFB-LD and the at least one input edge coupler of the Si PIC, the lens configured to minimize a mismatch between an output spot size of the DFB-LD and a spot size of the at least one input edge coupler of the Si PIC; andan isolator bonded to a facet of the at least one input edge coupler with a first volume of an index matching fluid.2. The optical package structure of claim 1 , wherein the isolator comprises a 0°-polarizer claim 1 , a Faraday rotator claim 1 , a 45°-polarizer claim 1 , and a wave plate.3. The optical package structure of claim 2 , wherein the wave plate is aligned to rotate a polarization of an output beam of the DFB-LD to a polarization state of the DFB-LD.4. The optical package structure of claim 2 , wherein the isolator is bonded to the at least one input edge coupler of ...

Rib-type waveguide silicon modulators and optical devices

A ring optical modulator includes a SOI substrate, including at least first and second top silicon layers, and a silicon-based ring resonator formed on the SOI substrate. The silicon-based ring resonator includes first and second top silicon layers, a thin dielectric gate layer disposed between the top silicon layers, first and second electric contacts, and first rib-type waveguide and ring-shape rib-type waveguide formed on the second top silicon layer. The thin dielectric layer includes a first side in contact with the first top silicon layer and a second side in contact with the second top silicon layer. With electric signals applied on the electric contacts, free carriers accumulate, deplete or invert within the top silicon layers on the first and second sides of the thin dielectric gate layer beneath the ring-shape rib-type waveguide, simultaneously, and a refractive index of the ring-shape rib-type waveguide confining optical fields is modulated.

Optical package providing efficient coupling between DFB-LD and silicon PIC edge couplers with low return loss

An optical package for providing efficient coupling between a distributed feedback laser diode (DFB-LD) and a silicon photonic integrated-circuit chip (Si PIC) edge couplers with low return loss, as well as variations thereof, is described. The optical package may include a DFB-LD, a Si PIC, a single mode fiber or fiber array assembly, a lens and a spacer. The Si PIC may include an input edge coupler and an output edge coupler. The single mode fiber or fiber array assembly may be aligned to the output edge coupler. The lens may be disposed between the DFB-LD and the input edge coupler, and may be configured to minimize a mismatch between an output spot size of the DFB-LD and a spot size of the input edge coupler of the Si PIC. The spacer may be bonded to a facet of the input edge coupler with an index matching fluid.

Ge/Si avalanche photodiode with integrated heater and fabrication method thereof

Various embodiments of a novel structure of a Ge/Si avalanche photodiode with an integrated heater, as well as a fabrication method thereof, are provided. In one aspect, a doped region is formed either on the top silicon layer or the silicon substrate layer to function as a resistor. When the environmental temperature decreases to a certain point, a temperature control loop will be automatically triggered and a proper bias is applied along the heater, thus the temperature of the junction region of a Ge/Si avalanche photodiode is kept within an optimized range to maintain high sensitivity of the avalanche photodiode and low bit-error rate level.

Integrated Lens-Array-On-Substrate For Optical Coupling System And Fabrication Method Thereof

An integrated optical coupling device may include a substrate, a coating layer disposed on the substrate, and a prism disposed on the coating layer. The prism may include a first surface and a second surface. The integrated optical coupling device may also include a first lens disposed on the first surface of the prism, a second lens disposed on the second surface of the prism, and an anti-reflection coating layer disposed on the first lens and the second lens. 1. An integrated optical coupling apparatus , comprising:a substrate of a first material;a first coating layer disposed on the substrate;a prism of a second material disposed on the coating layer, the prism having a first surface and a second surface;a first lens of the second material disposed on the first surface of the prism;a second lens of the second material disposed on the second surface of the prism; andan anti-reflection coating layer disposed on the first lens and the second lens,wherein the first material comprises one of glass, silicon, silicon-on-insulator, silica, sapphire, gallium-arsenide, or indium-phosphide, and wherein the substrate comprises a single-polished substrate,wherein the first lens comprises an aspheric lens, andwherein the second lens comprises an aspheric lens.2. The apparatus of claim 1 , wherein the substrate comprises a single-polished substrate.3. The apparatus of claim 1 , wherein the first coating layer comprises a reflection coating layer claim 1 , and wherein the reflection coating layer comprises a metal film claim 1 , a dielectric film claim 1 , a multilayer dielectric film claim 1 , or a combination of metal films and dielectric films.4. The apparatus of claim 1 , wherein the second material of the prism claim 1 , the first lens and the second lens comprises polymer claim 1 , polyimide claim 1 , epoxy claim 1 , resin claim 1 , or a combination thereof claim 1 , and wherein the second material is ultra-violet (UV) curable or thermal curable.5. The apparatus of claim 1 ...

Low return loss silicon photonics package structure

A compact and highly efficient coupling structure for coupling between DFB-LD and Si PIC edge coupler with suppressed return loss may include a DFB-LD, a Si PIC comprising at least one input edge coupler and at least one output edge coupler, a silica cover lid disposed on the Si PIC and aligned edge to edge with the Si PIC, a single-mode fiber aligned to the at least one output edge coupler of the Si PIC, a lens disposed between the DFB-LD and the at least one input edge coupler of the Si PIC, and an isolator bonded to a facet of the at least one input edge coupler with a first volume of an index matching fluid. The lens may be configured to minimize a mismatch between an output spot size of the DFB-LD and a spot size of the at least one input edge coupler of the Si PIC.

Genetically enhanced cyanobacteria for the production of a first chemical compound harbouring Zn2+, Co2+ or Ni2+ -inducible promoters

One embodiment of the invention is directed to a genetically enhanced cyanobacterium for the production of a first chemical compound, comprising at least one first recombinant gene encoding a first biocatalyst for the production of the first chemical compound, wherein the gene is under the transcriptional control of a Co 2+ or Zn 2+ -inducible promoter. Such a cyanobacterium can provide a tighter control of the production of the first chemical compound.

Vanadium nitride alloy production technology

The invention discloses a vanadium nitride alloy production technology which comprises the following steps: (1) crushing vanadium iron and combustion improver into 100-200 meshes, and mixing according to a ratio of 20:1; (2) placing the raw materials mixed in the step (1) in a reaction kettle, vacuumizing to -0.1 mPa, then filling nitrogen gas to 0.3 mPa, and closing the reaction kettle; (3) igniting the materials through an electronic ignition device to perform self-propagating reaction with the nitrogen gas, monitoring the pressure in the kettle through a pressure valve in the reaction process, and keeping the pressure in the kettle at 0.2-0.3 mPa; and (4) ensuring that the time from the start of the reaction to discharge is about 2-3 hours, gradually decreasing the pressure in the kettle to normal pressure after the pressure in the kettle does not change any more, then cooling to 200 DEG C, and discharging from the reaction kettle. Further, the combustion improver in the step (1) is ...

High performance GeSi avalanche photodiode operating beyond Ge bandgap limits

Avalanche photodiodes (APDs) having at least one top stressor layer disposed on a germanium (Ge) absorption layer are described herein. The top stressor layer can increase the tensile strain of the Ge absorption layer, thus extending the absorption of APDs to longer wavelengths beyond 1550 nm. In one embodiment, the top stressor layer has a four-layer structure, including an amorphous silicon (Si) layer disposed on the Ge absorption layer; a first silicon dioxide (SiO 2 ) layer disposed on the amorphous Si layer, a silicon nitride (SiN) layer disposed on the first SiO 2 layer, and a second SiO 2 layer disposed on the SiN layer. The Ge absorption layer can be further doped by p-type dopants. The doping concentration of p-type dopants is controlled such that a graded doping profile is formed within the Ge absorption layer to decrease the dark currents in APDs.

Novel Optical Package Providing Efficient Coupling Between DFB-LD And Silicon PIC Edge Couplers With Low Return Loss

An optical package for providing efficient coupling between a distributed feedback laser diode (DFB-LD) and a silicon photonic integrated-circuit chip (Si PIC) edge couplers with low return loss, as well as variations thereof, is described. The optical package may include a DFB-LD, a Si PIC, a single mode fiber or fiber array assembly, a lens and a spacer. The Si PIC may include an input edge coupler and an output edge coupler. The single mode fiber or fiber array assembly may be aligned to the output edge coupler. The lens may be disposed between the DFB-LD and the input edge coupler, and may be configured to minimize a mismatch between an output spot size of the DFB-LD and a spot size of the input edge coupler of the Si PIC. The spacer may be bonded to a facet of the input edge coupler with an index matching fluid.

Silicon-based rib-waveguide modulator and fabrication method thereof

Various structures of an electro-optic device and fabrication methods thereof are described. A fabrication method is provided to fabricate an electro-optic device which may include a silicon-based rib-waveguide modulator which includes a first top silicon layer, having a first doped region that is at least partially doped with dopants of a first conducting type, a second top silicon layer, having a second doped region that is at least partially doped with dopants of a second conducting type, and a thin dielectric gate layer disposed between the first top silicon layer and the second top silicon layer. The second doped region may be at least in part directly over the first doped region. The modulator may also include a rib waveguide formed on the second top silicon layer, a first electric contact formed on the first top silicon layer, and a second electric contact formed on the second top silicon layer.

Compensated Photonic Device Structure And Fabrication Method Thereof

Various embodiments of a compensated photonic device structure and fabrication method thereof are described herein. In one aspect, a photonic device may include a substrate and a functional layer disposed on the substrate. The substrate may be made of a first material and the functional layer may be made of a second material that is different from the first material. The photonic device may also include a compensation region formed at an interface region between the substrate and the functional layer. The compensation region may be doped with compensation dopants such that a first carrier concentration around the interface region of function layer is reduced and a second carrier concentration in a bulk region of functional layer is reduced.

Quick phototyping by laser cladding layer height measuring device and closed-loop control method thereof

The invention discloses a quick phototyping by laser cladding layer height measuring device and a closed-loop control method thereof. The quick phototyping by laser cladding layer height measuring device comprises three laser 2D (two-dimensional) displacement sensors, a control unit, an upper computer and a display. According to the closed-loop control method, the three laser 2D displacement sensors are spaced at an included angle of 120 degrees and mounted around a cladding bit for measuring the height of the cladding layers on the side lines of a closed laser equilateral triangle around a molten metal bath; every laser 2D displacement sensor is provided with a sensor controller for converting CMOS (complementary metal-oxide-semiconductor) image signals into height data and transmitting the height data to a control unit via an Ethernet network; the control unit is used for processing the data collected by the three laser 2D displacement sensors, computing the height of cladding layer and ...

Method for preparation of vanadium nitrogen alloy by pusher kiln technique

The invention discloses a method for preparation of vanadium nitrogen alloy by a pusher kiln technique. The method adopts double-pusher kiln equipment. The hearth structure of the double-pusher kiln consists of a kiln cavity, a cover plate, a side wall and a track. The kiln cavity is longitudinally provided with a low temperature section, a transition section, a high temperature section and a cooling section in order. The low temperature section has 5 temperature zones, the transition section has 4 temperature zones, and the high temperature section is provided with 7 temperature zones. The cooling section falls into a natural cooling area and a forced cooling area. Heating element jacks are disposed at corresponding positions on side wall bricks of the temperature zones, so that heating elements and the kiln cavity can be separated. The method for preparation of vanadium nitrogen alloy by the double-pusher kiln consists of: mixing raw materials evenly and making the mixture into a ball ...

Novel Optical Package Providing Efficient Coupling Between DFB-LD And Silicon PIC Edge Couplers With Low Return Loss

An optical package for providing efficient coupling between a photonic device and a silicon photonic integrated-circuit chip (Si PIC) edge couplers with low return loss, as well as variations thereof, is described. The optical package may include a photonic device, a Si PIC, a single mode fiber or fiber array assembly, a lens and a spacer. The Si PIC may an input edge coupler and an output edge coupler. The single mode fiber or fiber array assembly may be aligned to the output edge coupler. The lens may be disposed between the photonic device and the input edge coupler, and may be configured to minimize a mismatch between an output spot size of the photonic device and a spot size of the input edge coupler of the Si PIC. The spacer may be bonded to a facet of the input edge coupler with an index matching fluid.

Compensated Photonic Device Structure And Fabrication Method Thereof

Various embodiments of a compensated photonic device structure and fabrication method thereof are described herein. In one aspect, a photonic device may include a substrate and a functional layer disposed on the substrate. The substrate may be made of a first material and the functional layer may be made of a second material that is different from the first material. The photonic device may also include a compensation region formed at an interface region between the substrate and the functional layer. The compensation region may be doped with compensation dopants such that a first carrier concentration around the interface region of function layer is reduced and a second carrier concentration in a bulk region of functional layer is reduced. 1. A photonic device , comprising:a silicon-based substrate;a first contact layer heavily doped with first-type dopants and disposed on the substrate;a multiplication layer disposed on the first contact layer;a charge layer doped with second-type dopants and disposed on the multiplication layer;a germanium (Ge) absorption layer disposed on the charge layer;a second contact layer heavily doped with the second-type dopants and disposed on the Ge absorption layer;one or more anti-reflection layers disposed on the second contact layer; anda compensation region formed at an interface region between the charge layer and the Ge absorption layer, the compensation region doped with compensation dopants such that a first carrier concentration around the interface region of the Ge absorption layer is reduced and a second carrier concentration in a bulk region of the Ge absorption layer is reduced.2. The photonic device of claim 1 , wherein an overall carrier concentration in the Ge absorption layer of the photonic device is 50% or less of that of a non-compensated photonic device.3. The photonic device of claim 1 , wherein the first-type dopants comprise n-type dopants and the second-type dopants comprise p-type dopants.4. The photonic ...

LASER RADAR SYSTEM

A laser radar system includes: a light-emitting unit including a light source, and a scanning unit configured to reflect light from the light source with a controllable deflection angle, so as to scan a target object; a light-receiving unit configured to receive light reflected from the target object and outputting a detection value, wherein a light path by which light emitted from the light-emitting unit arrives at the target object is non-coaxial with a light path by which the light reflected from the target object arrives at the light-receiving unit. The laser radar system can reduce a problem where a single photon avalanche diode (SPAD) detector cannot eliminate a dark count, precisely measure distance information of a surrounding three-dimensional spatial environment, and substantially suppress influence of background light and other stray light, thereby realizing quick and efficient modulation of spatial light. 1. A light detection and ranging (LIDAR) system , comprising:a light emitting unit configured for emitting light to a target, wherein the light emitting unit comprises a light source and a scan unit, the scan unit being configured for reflecting the light from the light source with a controllable deflection angle so as to scan the target;a light receiving unit configured for receiving the light reflected from the target and outputting measurements, wherein the light receiving unit comprises photoelectric sensing means, and the photoelectric sensing means of the light receiving unit comprises:a two-dimensional photodetector array including a plurality of photodetectors; anda two-dimensional readout circuit array including a plurality of readout circuit units;wherein the plurality of readout circuit units are in one-to-one correspondence with the plurality of photodetectors, each readout circuit unit including a selector switch;orthe photoelectric sensing means of the light receiving unit comprises:a photodetector array including a first number of ...

Cyanobacterium sp. Host Cell and Vector for Production of Chemical Compounds in Cyanobacterial Cultures

A cyanobacterial host cell, sp., that harbors at least one recombinant gene for the production of a chemical compounds is provided, as well as vectors derived from an endogenous plasmid isolated from the cell. 1CyanobacteriumCyanobacteriumCyanobacterium. A genetically enhanced ethanologenic sp. ABICyano1 host cell comprising sp. ABICyano1 deposited in the American Type Culture Collection (ATCC) under ATCC accession number ______ comprising a genetically enhanced plasmid derived from a plasmid that is endogenous to sp. ABICyano1 , and wherein said plasmid comprises a heterologous adh gene and a heterologous pdc gene , andwherein said adh gene is operably linked to a constitutive promoter, andwherein said pdc gene is operably linked to an inducible promoter, and{'i': 'Cyanobacterium', 'wherein said sp. ABICyano1 can tolerate salinities ranging up to about 35 practical salinity units, and/or'}can tolerate temperatures ranging up to about 55 degrees Celsius, and/orcan tolerate dissolved oxygen concentrations ranging up to about 1000 μmol/L, and/orcan tolerate ethanol concentrations ranging up to about one percent for 16 weeks, and{'i': 'Cyanobacterium', 'sub': 750', '750, 'wherein production of ethanol by said ethanologenic sp. ABICyano1 host cell is from about 0.017 percent ethanol (vol/vol) per ODper day to about 0.031 percent ethanol (vol/vol) per ODper day.'}2Cyanobacterium. The host cell of wherein said constitutive promoter and said inducible promoter are endogenous to sp. ABICyano1.3Cyanobacterium. The host cell of wherein said constitutive promoter is heterologous to sp. ABICyano1. This application is a divisional application of U.S. application Ser. No. 14/041,122 filed on Sep. 30, 2013 which claims priority to U.S. Provisional Application No. 61/741,000 filed on Dec. 21, 2012, both of which are hereby incorporated by reference.This invention was made in part with United States government support under the Department of Energy grant number DE-EE0002867. The ...

Method for laser cladding and forming of metal or alloy under partial atmosphere protection

The present invention relates to a method for laser cladding and forming of a metal or alloy under partial atmosphere protection. Including: transporting a metal or alloy powder beam by an inert carrier gas to move on a machined surface with a focused laser beam; and forming at least one layer of inert protective gas at the outer periphery of the metal or alloy powder beam. The inert protective gas includes first inert protective gas, and the first inert protective gas is at the outer periphery of the focused laser beam. The problems of limited size, high cost and difficulty in moving a cladding and forming system and the like during part forming are solved by forming the inert protective gas at the outer periphery of the focused laser beam. Compared with the prior art, the convenient, fast and economical method is provided for on-site part forming and repair.

Integrated Lens-Array-On-Substrate For Optical Coupling System And Fabrication Method Thereof

An integrated optical coupling device may include a substrate, a coating layer disposed on the substrate, and a prism disposed on the coating layer. The prism may include a first surface and a second surface. The integrated optical coupling device may also include a first lens disposed on the first surface of the prism, a second lens disposed on the second surface of the prism, and an anti-reflection coating layer disposed on the first lens and the second lens.

Ge-Si P-I-N Photodiode With Reduced Dark Current And Fabrication Method Thereof

Various embodiments of a germanium-on-silicon (Ge—Si) photodiode are provided along with the fabrication method thereof. In one aspect, a Ge—Si photodiode includes a doped bottom region at the bottom of a germanium layer, formed by thermal diffusion of donors implanted into a silicon layer. The Ge—Si photodiode further includes a doped sidewall region of Ge mesa formed by ion implantation. Thus, the electric field is distributed in the intrinsic region of the Ge—Si photodiode where there is low dislocation density. The doped bottom region and sidewall region of the Ge layer prevent electric field from penetrating into the Ge—Si interface and Ge mesa sidewall region, where a large amount of dislocations are distributed. This design significantly suppresses dark current. 1. A photodiode comprising:a substrate layer;a bottom contact layer of a first semiconductor material and disposed on the substrate layer, the bottom contact layer doped to exhibit a first conductive type; a bottom doped region doped to exhibit the first conductive type;', 'an ion-implanted sidewall region doped to exhibit the first conductive type; and', 'an intrinsic region unintentionally doped or lightly doped to function as a depletion region;, 'an absorption layer of a second semiconductor material and disposed on the bottom contact layer, the absorption layer comprisinga top contact layer doped to exhibit a second conductive type and disposed on the absorption layer; andan anti-reflection layer disposed on the top contact layer.2. The photodiode of claim 1 , wherein the substrate comprises a silicon substrate or a silicon-on-insulator (SOI) substrate.3. The photodiode of claim 1 , wherein the first semiconductor material comprises silicon.4. The photodiode of claim 1 , wherein the second semiconductor material comprises germanium.5. The photodiode of claim 4 , wherein the sidewall region of the absorption layer comprises an inward-leaning sidewall.6. The photodiode of claim 1 , wherein the ...

A Ge-Si Avalanche Photodiode With Silicon Buffer Layer And Edge Electric Field Buffer Region

Various embodiments of a germanium-on-silicon (Ge—Si) avalanche photodiode are provided. In one aspect, the Ge—Si avalanche photodiode utilizes a silicon buffer layer to reduce the energy of holes drifting into absorption layer where the absorption material has lower ionization threshold, thereby suppressing multiplication noise and increasing the gain-bandwidth product of the avalanche photodiode. In another aspect, the Ge—Si avalanche photodiode utilizes an edge electric field buffer layer region to reduce the electric field along the sidewall of multiplication layer, where high electric field is applied for avalanche, thereby reducing probability of sidewall breakdown and enhancing reliability of the avalanche photodiode. 1. An avalanche photodiode comprising:a substrate;a bottom contact layer including a first semiconductor material disposed on the substrate and doped to exhibit a first conductive type; a bottom region doped to exhibit the first conductive type;', 'an intrinsic region unintentionally doped or lightly doped to function as a multiplication region;', 'a charge region doped to exhibit a second conductive type and disposed at a center region of a top portion of the multiplication layer is above the intrinsic region;', 'a guard-ring region disposed next to an outer periphery of the charge region of the multiplication layer above the intrinsic region; and', 'an edge electric field (E-field) buffer region disposed next to an outer periphery of the guard-ring region and unintentionally-doped or lightly-doped to function as a field-ramping region;, 'a multiplication layer including the first semiconductor material disposed on the bottom contact layer, the multiplication layer comprisinga buffer layer of the first semiconductor material and disposed on the multiplication layer, the buffer layer unintentionally-doped or lightly-doped to function as a buffer to reduce energy of drifting hot carriers;an absorption layer of a second semiconductor material and ...

Optical Coupler Having Anchored Cantilever Structure With Multi-Stage Inverse Taper Core Waveguide And Fabrication Method Thereof

An optical coupler structure may include a substrate, a waveguide section and an anchored cantilever section. The substrate may include a main body and a sub-pillar structure formed on the main body. The waveguide section may be disposed on the substrate, and may include a core waveguide of a first material surrounded by a cladding layer of a second material. The anchored cantilever section may be disposed on the sub-pillar structure on the substrate, which may be configured to support the cantilever section and separate the cantilever section from the main body of the substrate. The anchored cantilever section may include a multi-stage inverse taper core waveguide and a cladding layer, of the second material, which surrounds the multi-stage inverse taper core waveguide. 1. An optical coupler structure , comprising:a substrate, the substrate comprising a main body and a sub-pillar structure formed on the main body;a waveguide section disposed on the substrate, the waveguide section comprising a core waveguide of a first material surrounded by a cladding layer of a second material; and a multi-stage inverse taper core waveguide; and', 'a cladding layer of the second material surrounding the multi-stage inverse taper core waveguide., 'an anchored cantilever section disposed on the sub-pillar structure on the substrate, the sub-pillar structure configured to support the cantilever section and separate the cantilever section from the main body of the substrate, the anchored cantilever section comprising2. The optical coupler structure of claim 1 , wherein the multi-stage inverse taper core waveguide has a gradually increasing effective refractive index along a propagation axis from the anchored cantilever section to the waveguide section.3. The optical coupler structure of claim 1 , wherein a material of the multi-stage inverse taper core waveguide comprises silicon dioxide claim 1 , silicon nitride claim 1 , silicon oxynitride claim 1 , silicon claim 1 , polysilicon ...

Cyanobacterium sp. Host Cell and Vector for Production of Chemical Compounds in Cyanobacterial Cultures

A genetically enhanced cyanobacterial host cell, sp. ABICyanoI, is disclosed. The enhanced sp. ABICyanoI produces a compound or compounds of interest. 1214-. (canceled)215CyanobacteriumCyanobacterium. A non-naturally occurring ethanologenic sp. ABICyano1 wherein said organism comprises a genetically enhanced plasmid derived from a plasmid that is endogenous to sp. ABICyano1 selected from the group consisting of plasmids comprising SEQ ID NO: 1 and SEQ ID NO: 2.216Cyanobacterium. The non-naturally occurring ethanologenic sp. ABICyano1 organism of claim 215 , wherein said genetically enhanced plasmid comprises a heterologous adh gene and a heterologous pdc gene claim 215 , and wherein said adh gene is operably linked to a constitutive promoter claim 215 , and wherein said pdc gene is operably linked to a copper inducible promoter selected from the group consisting of Porf0221 claim 215 , Porf0223 and Porf0316.217CyanobacteriumCyanobacterium. The non-naturally occurring ethanologenic sp. ABICyano1 organism of claim 215 , wherein said genetically enhanced plasmid comprises a heterologous adh gene and a heterologous pdc gene claim 215 , and wherein said adh gene is operably linked to a constitutive promoter claim 215 , and wherein said pdc gene is operably linked to a copper inducible promoter selected from the group consisting of Porf0221 claim 215 , Porf0223 and Porf0316 claim 215 , and wherein production of ethanol by said ethanologenic sp. ABICyano1 host cell is from about 0.017 percent ethanol (vol/vol) per ODper day to about 0.031 percent ethanol (vol/vol) per ODper day for up to 30 days.218CyanobacteriumCyanobacterium. The non-naturally occurring sp. ABICyano1 organism of wherein said ethanologenic sp. ABICyano1 host cell produces up to about 0.049 percent ethanol (vol/vol) per ODper day.219CyanobacteriumCyanobacterium. A non-naturally occurring ethanologenic sp. ABICyano1 organism comprising sp. ABICyano1 deposited in the American Type Culture Collection (ATCC) ...

Device and a method for accurately mapping the building information modeling and the Internet of Things monitoring item

A device and a method for accurately mapping the building information modeling and the Internet of Things monitoring item based on building information modeling and building intellectual management, the device comprises: a key field identification module for screening an component ID code with entity monitoring data feedback from any building information modeling component with component ID code; an addressing module, which is based on an API interface of building intelligent subsystem, to obtain the IP address of terminal equipment Internet of Things equipment and the dynamic monitoring information of the equipment; an Internet of Things analysis module which is used for accurately analyzing the Internet of Things equipment communication signal; a rule mapping module which is used for generating a building information modeling and building entity equipment mapping rule to achieve accurate mapping.

Cyanobacterium sp. for Production of Compounds

A genetically enhanced cyanobacterial host cell, sp. ABICyano1, is disclosed. The enhanced sp. ABICyano1 produces a compound or compounds of interest. 1CyanobacteriumCyanobacteriumCyanobacterium. A non-naturally occurring ethanologenic sp. organism derived from sp. ABICyano1 wherein said organism comprises a genetically enhanced plasmid derived from a plasmid that is endogenous to sp. ABICyano1 , and wherein said organism produces ethanol from about 0.002% (vol/vol) per day up to about 0.07% (vol/vol) per day.2Cyanobacterium. The non-naturally occurring ethanologenic sp. organism of wherein said organism is capable of producing ethanol at a rate of 0.07%(vol/vol) per day.3Cyanobacterium. The non-naturally occurring ethanologenic sp. organism of wherein said organism is capable of producing ethanol at a rate of 0.047% (vol/vol) per twelve hours.4Cyanobacterium. The non-naturally occurring ethanologenic sp. organism of wherein said organism is capable of producing ethanol at a rate of about 0.0201% (vol/vol) per day at about 114 days of growth.5Cyanobacterium. The non-naturally occurring ethanologenic sp. organism of wherein said organism produces ethanol at about 135 days of growth.6CyanobacteriumCyanobacterium. The non-naturally occurring ethanologenic sp. organism of comprising sp. ABICyano1 deposited in the American Type Culture Collection (ATCC) under ATCC accession number PTA-13311 claim 1 , and further comprising an ethanologenic pathway comprising at leas one exogenous nucleic acid encoding an ethanologenic pathway enzyme expressed in a sufficient amount for the organism to produce ethanol claim 1 , said ethanologenic pathway comprising a pyruvate decarboxylase claim 1 , and an alcohol dehydrogenase.7CyanobacteriumCyanobacterium. The non-naturally occurring ethanologenic sp. organism of wherein said genetically enhanced plasmid is derived from a 6.8 kb plasmid endogenous to sp. ABICyano1 consisting of SEQ ID NO: 1.8CyanobacteriumCyanobacterium. The non- ...

Cyanobacterium sp. Host Cell and Vector for Production of Chemical Compounds in Cyanobacterial Cultures

A cyanobacterial host cell, Cyanobacterium sp., that harbors at least one recombinant gene for the production of a chemical compounds is provided, as well as vectors derived from an endogenous plasmid isolated from the cell.

SYSTEMS AND METHODS FOR MANAGING CONCURRENT DATA REQUESTS

In some embodiments, systems, methods, and apparatuses are provided herein useful for managing a plurality of concurrent and nearly concurrent data requests within a computer system. The systems have a main data storage for storing source data, and a high speed, and/or remote data storage for storing computed data. In some embodiments, a combination of data filters and distributed mutex processes are used to eliminate or limit duplicate reads and writes into the high speed data storage units by ensuring only a single service module gets a lock to do the read and update of the cache; and makes it possible for keys to expire and be removed from the data filter. The systems and methods herein have various applications including retail sales environments where the requested data is related to product sales, product availability and the like. 1. A system for managing multiple data requests , the system comprising:a main data store for storing source data;a first data store for storing computed data based on the source data retrieved from the main data store;a service module, coupled to a processor, the service module being configured to receive a plurality of data requests for the computed data; identify a request for an expired document within the computed data;', 'query a data filter to determine whether the request matches a key in the data filter;', a) generate a write request to update the document in the first data store based on the source data in the main data store; and', 'b) add a key to the data filter associated with the request for the expired document, wherein the key is configured to be automatically removed from the data filter after a predetermined time period; and, 'in the event that no key in the data filter matches the request, 'c) filter out the request to reduce the number of write requests received by the first data store for the expired document prior to the expired document being updated in the first data store;', 'in the event that a matching ...

LIDAR SYSTEM

A lidar system includes a laser emitting light source-044, a scanning unit, a transmitting-receiving-coaxial optical unit and a differential reception unit. The laser emitting light source includes a laser and a modulator. The transmitting-receiving-coaxial optical unit is configured to receiving receive a frequency-modulated emission light signal, and pass the same to the scanning unit and the differential reception unit, and is also configured to pass a reflected light signal to the differential reception unit. The scanning unit is configured to reflecting the frequency-modulated emission light signal to a target object at a deflectable angle, and reflect the reflected light signal from the target object to the transmitting-receiving-coaxial optical unit. The differential reception unit is configured to differentially receive the reflected light signal based on the received frequency-modulated emission light signal. With a differential reception, the laser radar system reduces noise, increases the signal-to-noise ratio, and increases the detection distance. 1. A lidar system comprising: a laser emitting light source , a scanning unit , a transmitting-receiving-coaxial optical unit , and a differential reception unit; whereinthe laser emitting light source comprises a laser and a modulator, wherein the laser is configured to generate an original emission light signal, and the modulator is configured to frequency-modulate the original emission light signal to generate a frequency-modulated emission light signal;the transmitting-receiving-coaxial optical unit is configured to receive the frequency-modulated emission light signal and respectively pass the frequency-modulated emission light signal to the scanning unit and the differential reception unit;the scanning unit is configured to reflect the frequency-modulated emission light signal to a target object at a deflectable angle and reflect a reflected light signal from the target object to the transmitting- ...

Ge/Si Avalanche Photodiode With Integrated Heater And Fabrication Method Thereof

Various embodiments of a novel structure of a Ge/Si avalanche photodiode with an integrated heater, as well as a fabrication method thereof, are provided. In one aspect, a doped region is formed either on the top silicon layer or the silicon substrate layer to function as a resistor. When the environmental temperature decreases to a certain point, a temperature control loop will be automatically triggered and a proper bias is applied along the heater, thus the temperature of the junction region of a Ge/Si avalanche photodiode is kept within an optimized range to maintain high sensitivity of the avalanche photodiode and low bit-error rate level. 1. An apparatus , comprising:a substrate; a first Si layer doped with dopants of a first type;', {'sup': −3', '−3, 'a second Si layer as a multiplication layer which is un-intentionally doped, lightly doped with dopants of the first type at a concentration of less than 5E17 cm, or lightly doped with dopants of a second type at a concentration of less than 5E17 cm;'}], 'at least one top-illuminated Ge/Si avalanche photodiode on a primary side of the substrate, the Ge/Si avalanche photodiode comprisinga charge layer doped with dopants of the second type;{'sup': −3', '−3, 'claim-text': 'a doped layer doped with dopants of the second type; and', 'a Ge layer as an absorption layer which is un-intentionally doped, lightly doped with dopants of the first type at a concentration of less than 5E17 cm, or lightly doped with dopants of the second type at a concentration of less than 5E17 cm; and'}at least one heater integrated in or on the substrate, wherein, when an environmental temperature is below a threshold temperature and in response to a bias being applied thereon, the at least one heater is configured to increase a temperature of the structure to maintain a level of sensitivity of the Ge/Si avalanche photodiode structure,wherein the substrate comprises a Si layer and a buried oxide (BOX) layer adjacent and below the Si layer, ...

High Performance Surface Illuminating GeSi Photodiodes

A GeSi avalanche photodiode (APD includes an anti-reflection structure, a Ge absorption region, and a resonance cavity enhanced (RCE) reflector. The anti-reflection structure includes one or more dielectric layers and a top contact layer which is heavily doped with dopants of a first polarity. The RCE reflector includes: an intrinsic or lightly doped Si multiplication layer, a Si contact layer which is heavily doped with dopants of a second polarity opposite the first polarity, a Si cavity length compensation layer, a buried oxide (BOX) layer, and a Si substrate. 1. A GeSi avalanche photodiode (APD) , comprising: one or more dielectric layers, and', 'a top contact layer on which the one or more dielectric layers are disposed, the top contact layer being heavily doped with dopants of a first polarity;, 'an anti-reflection structure, comprisinga germanium (Ge) absorption region on which the anti-reflection structure is disposed; and an intrinsic or lightly doped silicon (Si) multiplication layer,', 'a Si contact layer on which the Si multiplication layer is disposed, the Si contact layer being heavily doped with dopants of a second polarity opposite the first polarity,', 'a Si cavity length compensation layer on which the Si contact layer is disposed,', 'a buried oxide (BOX) layer on which the Si cavity length compensation layer is disposed, and', 'a Si substrate on which the BOX layer is disposed., 'a resonance cavity enhanced (RCE) reflector on which the Ge absorption region is disposed, the RCE reflector comprising2. The GeSi APD of claim 1 , wherein the first polarity is p-type and the second polarity is n-type.3. The GeSi APD of claim 1 , wherein the top contact layer heavily doped with dopants of the first polarity comprises:a Ge cavity length compensation layer heavily doped with dopants of the first polarity; andan amorphous Si layer heavily doped with dopants of the first polarity and disposed on the Ge cavity length compensation layer.4. The GeSi APD of ...

Silicon Photonic Integrated Circuit With Electrostatic Discharge Protection

Various embodiments of a photonic integrated circuit (PIC) are described herein. A PIC, functioning as a coherent receiver, may include optical components such as an optical coupler, a directional coupler, a beam splitter, a polarizing beam rotator-splitter, a variable optical attenuator, a monitor photodiode, 90-degree hybrid mixer, and a waveguide photodiode. The PIC may also include electrical components such as an electrode, a capacitor, a resistor and a Zener diode.

METHOD FOR DEPOSITING HORIZONTAL RIB ON UNEQUAL-HEIGHT SECTION BY LASER CLADDING

The present invention relates to a method for depositing a horizontal rib on an unequal-height section by laser cladding, including the following steps: providing an unequal-height section and a laser cladding device, determining a deposition position on the unequal-height section, and determining a length of a rib on the unequal-height section according to the deposition position; using a lowest point of the deposition position as a first segment of the rib and a highest point as a last segment of the rib; determining a number of segments of the rib according to the length and a vertical height of each segment of the rib; determining a cladding speed of each segment of the rib according to a relationship between a cladding height of each segment of the rib and a scanning speed under a certain parameter; and carrying out laser cladding to obtain a horizontal rib. 1. A method for depositing a horizontal rib on an unequal-height section by laser cladding , comprising the following steps:providing an unequal-height section and a laser cladding device, determining a deposition position on the unequal-height section, and determining a length of a rib on the unequal-height section according to the deposition position; andusing a lowest point of the deposition position as a first segment of the rib and a highest point as a last segment of the rib; determining a number of segments of the rib according to the length and a vertical height of each segment of the rib; determining a cladding speed of each segment of the rib according to a relationship between a cladding height of each segment of the rib and a scanning speed under a certain parameter; and carrying out laser cladding to obtain a horizontal rib.2. The method for depositing a horizontal rib on an unequal-height section by laser cladding according to claim 1 , wherein the first segment and the last segment are provided with a deceleration segment.3. The method for depositing a horizontal rib on an unequal-height ...

Bi-Directional Multi-Channel Social Media Brokering

The present disclosure provides a detailed description of techniques used in systems, methods, and in computer program products for bi-directional social media broker services that connect multiple social media sites using a common management framework. The claimed embodiments address the problem of efficiently scaling and managing bidirectional interaction with multiple social media publishing channels. More specifically, the claimed embodiments are directed to approaches for a computing platform having multiple message broker modules that enable bi-directional communication of messages between a common resource manager and a plurality of social media sites. The message broker modules can receive messages in a unified message format from the common resource manager, queue the messages for asynchronous processing, translate the messages from the unified message format to a site-specific format, and deliver the translated messages to multiple social media sites.

High Performance GeSi Avalanche Photodiode Operating Beyond Ge Bandgap Limits

Avalanche photodiodes (APDs) having at least one top stressor layer disposed on a germanium (Ge) absorption layer are described herein. The top stressor layer can increase the tensile strain of the Ge absorption layer, thus extending the absorption of APDs to longer wavelengths beyond 1550 nm. In one embodiment, the top stressor layer has a four-layer structure, including an amorphous silicon (Si) layer disposed on the Ge absorption layer; a first silicon dioxide (SiO) layer disposed on the amorphous Si layer, a silicon nitride (SiN) layer disposed on the first SiOlayer, and a second SiOlayer disposed on the SiN layer. The Ge absorption layer can be further doped by p-type dopants. The doping concentration of p-type dopants is controlled such that a graded doping profile is formed within the Ge absorption layer to decrease the dark currents in APDs. 1. An avalanche photodiode , comprising:a silicon-based substrate with a buried oxide (BOX) layer, the substrate having a first side and a second side opposite the first side;at least one bottom stressor layer disposed on the second side of the substrate and adjacent to the BOX layer; and at least one top stressor layer coupled to at least one metal contact of a first electrical polarity; and', 'a germanium (Ge) absorption layer on which the at least one top stressor layer is disposed,, 'a multi-layer structure disposed on the first side of the substrate, comprisingwherein the at least one top stressor layer is configured to increase a tensile strain in the Ge absorption layer such that absorption of the Ge absorption layer between 1550 nm and 1650 nm is increased.2. The avalanche photodiode of claim 1 , wherein the at least one top stressor layer further comprises:an amorphous silicon layer;{'sub': '2', 'a first silicon dioxide (SiO) layer disposed on the amorphous Si layer;'}{'sub': '2', 'a silicon nitride (SiN) layer disposed on the first SiOlayer; and'}{'sub': '2', 'a second SiOlayer disposed on the SiN layer.'}3. ...

SYNCHRONOUS POWDER-FEEDING SPACE LASER MACHINING AND THREE-DIMENSIONAL FORMING METHOD AND DEVICE

A method for synchronous powder-feeding space laser cladding and three-dimensional forming includes: dividing a three-dimensional solid into a plurality of forming units according to a form simplification and nozzle cladding scanning accessibility principle, and dividing each forming unit into a plurality of layers; employing a single-beam gas-carried power-feeding mode in a hollow annular laser; controlling a mechanical arm () to drive an in-laser powder-feeding nozzle () to move and scan along a predetermined trajectory in a filling area and a boundary area of the layer; and sequentially conducting cladding and stacking formation of the layer for the entire unit. A device includes an inside-laser powder-feeding nozzle (), a laser generator (), a mechanical arm (), a control module (), a transmission optical fiber (), a gas-carried powder feeder () and a gas source ().

Ge/Si Avalanche Photodiode With Integrated Heater And Fabrication Thereof

Various embodiments of a novel structure of a Ge/Si avalanche photodiode with an integrated heater, as well as a fabrication method thereof, are provided. In one aspect, a doped region is formed either on the top silicon layer or the silicon substrate layer to function as a resistor. When the environmental temperature decreases to a certain point, a temperature control loop will be automatically triggered and a proper bias is applied along the heater, thus the temperature of the junction region of a Ge/Si avalanche photodiode is kept within an optimized range to maintain high sensitivity of the avalanche photodiode and low bit-error rate level. 1. An apparatus , comprising:a substrate; a first Si layer doped with dopants of a first type;', {'sup': −3', '−3, 'a second Si layer as a multiplication layer which is un-intentionally doped, lightly doped with dopants of the first type at a concentration of less than 5E17 cm, or lightly doped with dopants of a second type at a concentration of less than 5E17 cm;'}, 'a charge layer doped with dopants of the second type;', {'sup': −3', '−3, 'a Ge layer as an absorption layer which is un-intentionally doped, lightly doped with dopants of the first type at a concentration of less than 5E17 cm, or lightly doped with dopants of the second type at a concentration of less than 5E17 cm; and'}, 'a doped layer doped with dopants of the second type; and, 'at least one top-illuminated Ge/Si avalanche photodiode on a primary side of the substrate, the Ge/Si avalanche photodiode comprisingat least one heater integrated in or on the substrate, wherein, when an environmental temperature is below a threshold temperature and in response to a bias being applied thereon, the at least one heater is configured to increase a temperature of the structure to maintain a level of sensitivity of the Ge/Si avalanche photodiode structure.2. The apparatus of claim 1 , wherein the at least one heater comprises a resistive component.30. The apparatus of ...

BI-DIRECTIONAL MULTI-CHANNEL SOCIAL MEDIA BROKERING

The present disclosure provides a detailed description of techniques used in systems, methods, and in computer program products for bi-directional social media broker services that connect multiple social media sites using a common management framework. The claimed embodiments address the problem of efficiently scaling and managing bidirectional interaction with multiple social media publishing channels. More specifically, the claimed embodiments are directed to approaches for a computing platform having multiple message broker modules that enable bi-directional communication of messages between a common resource manager and a plurality of social media sites. The message broker modules can receive messages in a unified message format from the common resource manager, queue the messages for asynchronous processing, translate the messages from the unified message format to a site-specific format, and deliver the translated messages to multiple social media sites. 1. A method comprising:brokering, in a first direction from a social resource management application to one or more social media sites, by receiving one or more first electronic messages over a network in a first format, and converting the one or more messages from the first format to a second format to generate a first converted message that is delivered to a first social media site;brokering, in a second direction from the one or more social media sites to the social resource management application, by receiving from the first social media site at least one second electronic message comprising social media data fields, wherein at least one of the social media data fields is in response to the first converted message; andconverting the one or more first electronic messages from the first format to a third format to generate a second converted message, and delivering the second converted message to a second social media site.2. The method of claim 1 , wherein the social media data fields include any of a “ ...

GENETICALLY ENHANCED CYANOBACTERIA FOR THE PRODUCTION OF A FIRST CHEMICAL COMPOUND HARBOURING ZN2+, CO2+ OR NI2+ -INDUCIBLE PROMOTERS

One embodiment of the invention is directed to a genetically enhanced cyanobacterium for the production of a first chemical compound, comprising at least one first recombinant gene encoding a first biocatalyst for the production of the first chemical compound, wherein the gene is under the transcriptional control of a Co or Zn-inducible promoter. Such a cyanobacterium can provide a tighter control of the production of the first chemical compound. 1. An ethanologenic recombinant cyanobacterium comprising a recombinant alcohol dehydrogenase gene and a heterologous pyruvate decarboxylase gene wherein said alcohol dehydrogenase gene is operably linked to a first promoter and wherein said pyruvate decarboxylase gene is operably linked to a second promoter and wherein said second promoter is a Co2+ inducible promoter or a Zn2+ inducible promoter.2. The ethanologenic recombinant cyanobacterium of wherein said first promoter is a Co2+ inducible promoter or a Zn2+ inducible promoter.3. The ethanologenic recombinant cyanobacterium of wherein said first promoter is constitutive.4. The ethanologenic recombinant cyanobacterium of wherein said first promoter is PrbcL.5SynechocystisSynechococcusSynechococcusSynechocystisAnabaenaOscillatoria brevisOscillatoria brevisStaphylococcus aureusStaphylococcus aureusMycobacterium tuberculosis.. The ethanologenic recombinant cyanobacterium of wherein said second promoter is selected from the group consisting of PziaA from 6803 claim 1 , PsmtA from 7942 and 7002 claim 1 , PcorT from 6803 claim 1 , PaztA from 7120 claim 1 , PbmtA from claim 1 , Pbxa1 from claim 1 , PzntA from claim 1 , PczrB from 912 claim 1 , and PnmtA from6. The ethanologenic recombinant cyanobacterium of comprising an extrachromosomal plasmid wherein said extrachromosomal plasmid is selected from the group consisting of an extrachromosomal plasmid consisting of said first promoter claim 1 , said recombinant alcohol dehydrogenase gene claim 1 , said second promoter claim 1 , ...

Novel Shuttle Vector Capable of Transforming Multiple Genera of Cyanobacteria

A plasmid vector for the production of compounds in cyanobacteria is described which is capable of being efficiently transformed to and replicating in a broad range of cyanobacterial species. 1cyanobacterium. A nucleic acid construct for expressing a recombinant gene in a , comprising:a. a DNA origin of replication for replication of the nucleic acid construct in cyanobacteria;b. a gene encoding a protein regulating replication of the nucleic acid construct in cyanobacteria by interacting with the DNA origin of replication, the protein comprising an amino acid sequence having at least 80% sequence identity to SEQ ID NO: 3; and{'i': 'cyanobacterium', 'c. at least one recombinant gene selected from (i) a production gene encoding a biocatalyst for the production of a chemical compound, (ii) a marker gene able to indicate the presence of the nucleic acid construct in the , and combinations thereof, wherein said at least one recombinant gene is operably linked to at least one promoter.'}2. The nucleic acid construct of claim 1 , wherein the DNA origin of replication comprises a nucleotide sequence having at least 80% sequence identity to SEQ ID NO: 15.3cyanobacteriumcyanobacterium.. The nucleic acid construct of claim 1 , wherein said production gene is a biosynthetic pathway gene encoding an enzyme catalyzing a metabolic reaction which is not present in the wild-type for the production of a chemical compound in the4. The nucleic acid construct of claim 3 , wherein the chemical compound is selected from the group consisting of: alcohols claim 3 , alkanes claim 3 , alkenes claim 3 , ethers claim 3 , polyhydroxyalkanoates such as PHB claim 3 , fatty acids claim 3 , fatty acid esters claim 3 , hydrogen claim 3 , and combinations thereof.5. The nucleic acid construct of claim 4 , wherein the alcohol is ethanol.6. The nucleic acid construct of claim 1 , wherein the production gene comprises at least one gene selected from the group consisting of: a gene encoding pyruvate ...

Bi-Directional Multi-Channel Social Media Brokering

The present disclosure provides a detailed description of techniques used in systems, methods, and in computer program products for bi-directional social media broker services that connect multiple social media sites using a common management framework. The claimed embodiments address the problem of efficiently scaling and managing bidirectional interaction with multiple social media publishing channels. More specifically, the claimed embodiments are directed to approaches for a computing platform having multiple message broker modules that enable bi-directional communication of messages between a common resource manager and a plurality of social media sites. The message broker modules can receive messages in a unified message format from the common resource manager, queue the messages for asynchronous processing, translate the messages from the unified message format to a site-specific format, and deliver the translated messages to multiple social media sites.

Polarization Rotator-Splitter/Combiner Based On Silicon Rib-Type Waveguides

Various embodiments of an integrated polarization rotator-splitter/combiner apparatus are described. An integrated polarization rotator-splitter apparatus may include an input waveguide section, a polarization rotator section, a polarization splitter section and an outgoing waveguide section, which can also be reversely connected as a polarization rotator-combiner. 1. An integrated polarization rotator-splitter apparatus , comprising:an input waveguide section;a rib-type waveguide based polarization rotator section;a rib-type waveguide based polarization splitter section; andan outgoing waveguide section.2. The apparatus of claim 1 , wherein the input waveguide section comprises a channel-type waveguide configured to receive an optical signal with TE0-polarized and TM0-polarized modes.3. The apparatus of claim 1 , wherein the polarization rotator section comprises a taper rib-type waveguide comprising:a first part comprising a tapered slab on each side of the rib-type waveguide, each tapered slab configured to adiabatically couple an optical signal from channel modes to rib modes; anda second part comprising a tapered rib with larger width on an output side, each tapered rib configured to rotate a TM0-polarized component of the optical signal to a higher-order mode, TEn, of the rib-type waveguide and to output the TEn mode to the polarization splitter section, wherein n is greater than or equal to 1, and wherein the TE0-polarized component propagates without loss and is provided to the polarization splitter section.4. The apparatus of claim 1 , wherein the polarization splitter section comprises a rib-type asymmetric directional coupler comprising:a first branch connected to an output port of the polarization rotator section, the first branch configured to propagate a TE0 component to the output port without loss; anda second branch disposed in parallel with the first branch, a rib width of the second branch configured to match a TE0 mode thereof to a higher-order ...

LASER BROADBAND CLADDING DEVICE

The present invention relates to the broadband laser cladding apparatus and more particularly to the field of 3D forming. The broadband laser cladding apparatus includes a mirror assembly and a multifunctional reflective optics assembly. The mirror assembly is configured to transmit the laser from the laser generator to the multifunctional reflective optics assembly. The multifunctional reflective optics assembly comprises an upper focusing mirror assembly to receive and redirect the laser to form the cladding spot on the work piece, as well as a reflective mirror assembly to receive and redirect the laser to form the pre-heating and slow-cooling spots outside the cladding spot, wherein the reflective mirror assembly is adjoining with the bottom edge of the upper focusing mirror assembly.

Silicon Photonic Integrated Circuit With Electrostatic Discharge Protection

Various embodiments of a photonic integrated circuit (PIC) are described herein. A PIC, functioning as a coherent receiver, may include optical components such as an optical coupler, a directional coupler, a beam splitter, a polarizing beam rotator-splitter, a variable optical attenuator, a monitor photodiode, 90-degree hybrid mixer, and a waveguide photodiode. The PIC may also include electrical components such as an electrode, a capacitor, a resistor and a Zener diode.

Silicon-Based Rib-Waveguide Modulator And Fabrication Method Thereof

Various structures of an electro-optic device and fabrication methods thereof are described. A fabrication method is provided to fabricate an electro-optic device which may include a silicon-based rib-waveguide modulator which includes a first top silicon layer, having a first doped region that is at least partially doped with dopants of a first conducting type, a second top silicon layer, having a second doped region that is at least partially doped with dopants of a second conducting type, and a thin dielectric gate layer disposed between the first top silicon layer and the second top silicon layer. The second doped region may be at least in part directly over the first doped region. The modulator may also include a rib waveguide formed on the second top silicon layer, a first electric contact formed on the first top silicon layer, and a second electric contact formed on the second top silicon layer.

Flexible connecting structure of prefabricated component and building main body

The present invention discloses a flexible connecting structure of a prefabricated component and a building main body. The flexible connecting structure comprises multiple layers of cast-in-situ building main bodies spaced up and down, a prefabricated component is connected between two adjacent cast-in-situ building main bodies, a tenon is provided at the lower end of the prefabricated component, a mortise matching the tenon is provided on the top surface of the cast-in-situ building main body, and the prefabricated component is socketed to the lower layer of cast-in-situ building main body by tenon-and-mortise cooperation; and a first flexible layer for reducing the connection rigidity between the prefabricated component and the upper layer of cast-in-situ building main body is provided at the junction between the prefabricated component and the upper layer of cast-in-situ building main body. The present invention realizes a flexible connection between a prefabricated component and a building main body, and avoids the influence of the prefabricated component on the rigidity of the building main body.

Systems and methods for managing concurrent data requests

In some embodiments, systems, methods, and apparatuses are provided herein useful for managing a plurality of concurrent and nearly concurrent data requests within a computer system. The systems have a main data storage for storing source data, and a high speed, and/or remote data storage for storing computed data. In some embodiments, a combination of data filters and distributed mutex processes are used to eliminate or limit duplicate reads and writes into the high speed data storage units by ensuring only a single service module gets a lock to do the read and update of the cache; and makes it possible for keys to expire and be removed from the data filter. The systems and methods herein have various applications including retail sales environments where the requested data is related to product sales, product availability and the like.

ANNULAR HOLLOW OFFSET-FOCUS LASER CLADDING DEVICE

An annular hollow offset-focus laser cladding device, including a housing, a conical reflector arranged in the housing, an annular off-axis parabolic focusing mirror opposite to and arranged coaxially with the conical reflector, a nozzle installed below the conical reflector and a powder-spraying tube connected to a lower end of the nozzle. A top of the housing is provided with a light entrance; the conical reflector faces the light entrance; The powder-spraying tube is coaxial with the annular hollow offset-focusing light reflected by the annular off-axis parabolic focusing mirror; a collimating protective gas jacket is arranged on a periphery of the powder-spraying tube, and the collimating protective gas jacket is located between the annular hollow offset-focused light and the powder-spraying tube; the annular off-axis parabolic focusing mirror is configured to create a horizontally offset of parent parabola focus.

Cyanobacterium sp. for production of compounds

A genetically enhanced cyanobacterial host cell, Cyanobacterium sp. ABICyanoI, is disclosed. The enhanced Cyanobacterium sp. ABICyanoI produces a compound or compounds of interest.

Optical coupler having anchored cantilever structure with multi-stage inverse taper core waveguide and fabrication method thereof

An optical coupler structure may include a substrate, a waveguide section and an anchored cantilever section. The substrate may include a main body and a sub-pillar structure formed on the main body. The waveguide section may be disposed on the substrate, and may include a core waveguide of a first material surrounded by a cladding layer of a second material. The anchored cantilever section may be disposed on the sub-pillar structure on the substrate, which may be configured to support the cantilever section and separate the cantilever section from the main body of the substrate. The anchored cantilever section may include a multi-stage inverse taper core waveguide and a cladding layer, of the second material, which surrounds the multi-stage inverse taper core waveguide.

Polynucleotide having promoter activity and use thereof in production of traget compounds

Provided are a polynucleotide having promoter activity and use thereof in the production of target compounds. Specifically, provided are a polynucleotide having promoter activity, a transcription expression cassette, a recombinant expression vector, and a recombinant host cell comprising the polynucleotide having promoter activity, a method for regulating the transcription of a target gene, a method for preparing a protein, and a method for producing target compounds. The provided polynucleotide having promoter activity is a high salt and high osmolality-inducible promoter, and has an enhanced promoter activity in an environment of increased salt concentration and osmolality. The polynucleotide is operably ligated to the target gene, can significantly improve the expression intensity of the target gene in the stress environment of high salt and high osmolality, thereby stably and efficiently producing a downstream product, and effectively solving the current problems of adding expensive inducers such as IPTG and causing toxicity to a strain.

Polynucleotide Having Promoter Activity and Application of Polynucleotide in Producing Amino Acid

Provided are a polynucleotide having promoter activity and an application of the polynucleotide in producing an amino acid. Also disclosed are a transcription expression cassette, a recombinant expression vector, and a recombinant host cell which contain the polynucleotide, and a method for enhancing expression of a target gene, a method for preparing a protein, and a method for producing an amino acid. The polynucleotide having the promoter activity is a mutant of a polynucleotide having the sequence as shown in SEQ ID NO: 9. Compared with the polynucleotide having the sequence as shown in SEQ ID NO: 9, the promoter activity of the mutant is significantly enhanced, thereby promoting the stable and efficient expression of the target gene.

Silicon photonic integrated circuit with electrostatic discharge protection

Various embodiments of a photonic integrated circuit (PIC) are described herein. A PIC, functioning as a coherent receiver, may include optical components such as an optical coupler, a directional coupler, a beam splitter, a polarizing beam rotator-splitter, a variable optical attenuator, a monitor photodiode, 90-degree hybrid mixer, and a waveguide photodiode. The PIC may also include electrical components such as an electrode, a capacitor, a resistor and a Zener diode.

Bi-directional multi-channel social media brokering

The present disclosure provides a detailed description of techniques used in systems, methods, and in computer program products for bi-directional social media broker services that connect multiple social media sites using a common management framework. The claimed embodiments address the problem of efficiently scaling and managing bidirectional interaction with multiple social media publishing channels. More specifically, the claimed embodiments are directed to approaches for a computing platform having multiple message broker modules that enable bi-directional communication of messages between a common resource manager and a plurality of social media sites. The message broker modules can receive messages in a unified message format from the common resource manager, queue the messages for asynchronous processing, translate the messages from the unified message format to a site-specific format, and deliver the translated messages to multiple social media sites.

Bi-directional multi-channel social media brokering

The present disclosure provides a detailed description of techniques used in systems, methods, and in computer program products for bi-directional social media broker services that connect multiple social media sites using a common management framework. The claimed embodiments address the problem of efficiently scaling and managing bidirectional interaction with multiple social media publishing channels. More specifically, the claimed embodiments are directed to approaches for a computing platform having multiple message broker modules that enable bi-directional communication of messages between a common resource manager and a plurality of social media sites. The message broker modules can receive messages in a unified message format from the common resource manager, queue the messages for asynchronous processing, translate the messages from the unified message format to a site-specific format, and deliver the translated messages to multiple social media sites.

一种一体化装配式卫生间

本实用新型公开了一种一体化装配式卫生间，包括卫生间主体，所述卫生间主体的空腔内设有防水底盘，所述防水底盘将所述卫生间主体分隔为墙体和位于墙体下端的沉箱；所述墙体的内壁铺设有墙面板，所述墙体的顶部设有顶盖，所述墙体内预埋有给水管和线管；所述防水底盘和/或墙面板上安装有与所述给水管连通的卫浴设备，所述沉箱底部和防水底盘之间的空腔内设有与卫浴设备连通的下水管以及与下水管连通的排水管；所述顶盖的下端设有与所述线管内的电线接通的卫浴家电。可解决传统卫生间结构、管线、保温、装饰现场作业工作量大、质量难以保证、工效底等问题，及提高建筑的装配化率。

Lidar system

Barrier and heat-sealable cellulose film, preparation method therefor, and application thereof

The present invention relates to the technical field of functional cellulose films, and provides a barrier and heat-sealable cellulose film, a preparation method therefor, and an application thereof. The barrier and heat-sealable cellulose film provided by the present invention comprises a barrier layer, a regenerated cellulose base film, and an adhesive layer which are sequentially stacked, wherein the barrier layer is formed by a barrier coating (a polyvinylidene chloride emulsion, a first anti-sticking agent, and water), and the adhesive layer is formed by an adhesive coating (an emulsion (an acrylate emulsion and/or a polyurethane emulsion), a second anti-sticking agent, and water). The barrier and heat-sealable cellulose film provided by the present invention has high adhesion and high barrier performance, can be directly hot-pressed with a paper product, is high in adhesive strength with a paper product, and meets the use requirement of a coated paper for adhesive strength. The barrier and heat-sealable cellulose film provided by the present invention is high in moisture barrier performance and oxygen barrier performance, and has excellent aroma retention performance, fresh-keeping performance, and moisture resistance. The barrier and heat-sealable cellulose film provided by the present invention is high in self-heat-sealing strength, and can be self-hot-pressed to prepare a packaging bag which is high in edge sealing strength.

Method for Realizing High-Speed Cladding of Hollow Offset-Focus Annular Laser

A method for realizing high-speed cladding of hollow offset-focus annual laser. The method includes the following steps: dividing laser into annual light, and forming an offset-focus annual light spot after the annual light is focused, which acts on a surface of a matrix; during cladding for the surface of the matrix, selecting laser parameters according to different materials; after every cladding, making a shift by 20-80% of the diameter of the light spot in a vertical direction of a scanning speed of the laser; in the cladding process, selecting shielding gas for protection, and blowing the shielding gas to the molten powder in the air to spray the molten powder in air towards the surface of the matrix at a certain speed so that the cladding layer and the matrix are bonded firmly, and cladding the surface of the matrix to form a coating layer.

Annular hollow offset-focus laser cladding device

An annular hollow offset-focus laser cladding device, including a housing, a conical reflector arranged in the housing, an annular off-axis parabolic focusing mirror opposite to and arranged coaxially with the conical reflector, a nozzle installed below the conical reflector and a powder-spraying tube connected to a lower end of the nozzle. A top of the housing is provided with a light entrance; the conical reflector faces the light entrance; The powder-spraying tube is coaxial with the annular hollow offset-focusing light reflected by the annular off-axis parabolic focusing mirror; a collimating protective gas jacket is arranged on a periphery of the powder-spraying tube, and the collimating protective gas jacket is located between the annular hollow offset-focused light and the powder-spraying tube; the annular off-axis parabolic focusing mirror is configured to create a horizontally offset of parent parabola focus.

Microorganism that produces lysine and method for producing lysine

Aspartate kinase gene expression regulatory sequence and use thereof

Disclosed are an aspartate kinase gene expression regulatory sequence and the use thereof. By modifying positions 366-373 of a sequence represented by SEQ ID NO: 1, a polynucleotide formed by linking the sequence with a start codon GTG or TTG has transcriptional expression regulation activity, and these polynucleotides can improve expression of the aspartate kinase encoding gene lysC, such that a large amount of L-lysine is accumulated.

Aspartate kinase gene expression regulatory sequence and use thereof

Disclosed are an aspartate kinase gene expression regulatory sequence and use thereof. By modifying positions 366-373 of a sequence represented by SEQ ID NO: 1, a polynucleotide formed by linking the sequence with a start codon GTG or TTG has transcriptional expression regulation activity, and these polynucleotides can improve the expression of the aspartate kinase encoding gene lysC, such that a large amount of L-lysine is accumulated.

FeCrCuTiV High-entropy Alloy Powder for Laser Melting Deposition Manufacturing and Preparation Method Thereof

Provided is a FeCrCuTiV high-entropy alloy powder for laser melting deposition manufacturing and a preparation method thereof, in percent by weight, the composition of the high-entropy alloy powder is: chromium 17-20%; copper 22-25%; titanium 16-19%; vanadium 17-20%; and ferrum 19-22%, wherein by utilizing the solid solution effect of alloying elements such as Ti, V and Cu of the high-entropy alloy, it can effectively alleviate the differences in thermal expansion coefficient, melting point, elastic modulus, etc. of the tungsten/steel or tungsten/copper heterogeneous interface, can reduce the residual stress level at the heterogeneous interface during the laser melting deposition manufacturing process and avoid the precipitation of Laves phase, and can meet the manufacturing requirements of tungsten/steel and tungsten/copper heterogeneous components for fusion reactors.

Polinucleotídeo e cassete de expressão para regular a expressão do gene lysc da aspartato quinase, sequência de polinucleotídeos, vetor, célula hospedeira, métodos para intensificar a expressão de um gene lysc que codifica a aspartato quinase e para produzir l-lisina, e, usos da sequência de polinucleotídeos, do vetor, do cassete de expressão e da célula hospedeira e do polinucleotídeo

polinucleotídeo e cassete de expressão para regular a expressão do gene lysc da aspartato quinase, sequência de polinucleotídeos, vetor, célula hospedeira, métodos para intensificar a expressão de um gene lysc que codifica a aspartato quinase e para produzir l-lisina, e, usos da sequência de polinucleotídeos, do vetor, do cassete de expressão e da célula hospedeira e do polinucleotídeo. são descritos uma sequência regulatória da expressão do gene da aspartato quinase e o uso da mesma. ao modificar as posições 366 a 373 de uma sequência representada pela seq id no: 1, um polinucleotídeo formado pela ligação da sequência com um códon de iniciação gtg ou ttg tem atividade de regulação da expressão transcricional, e esses polinucleotídeos podem melhorar a expressão do gene lysc que codifica a aspartato quinase., de modo que uma grande quantidade de l-lisina seja acumulada.

Systems and methods for managing concurrent data requests

In some embodiments, systems, methods, and apparatuses are provided herein useful for managing a plurality of concurrent and nearly concurrent data requests within a computer system. The systems have a main data storage for storing source data, and a high speed, and/or remote data storage for storing computed data. In some embodiments, a combination of data filters and distributed mutex processes are used to eliminate or limit duplicate reads and writes into the high speed data storage units by ensuring only a single service module gets a lock to do the read and update of the cache; and makes it possible for keys to expire and be removed from the data filter. The systems and methods herein have various applications including retail sales environments where the requested data is related to product sales, product availability and the like.

Replacement device of suspender in long-span concrete filled steel tubular arch bridge

The present invention discloses a replacement device of suspender in long-span concrete filled steel tubular arch bridge, including a flat plate, a vertical plate welded on back of flat plate, a bolt connected with the front of vertical plate, a screw penetrated top of flat plate, a first ring and a second ring sleeved outside of screw, a clamping column fixedly connected with bottom of screw, a clamping groove opened on the back of clamping column, a fixing block connected with inside of clamping groove, a plurality of rollers clamped at a position where fixing block outwardly extends five centimeters, an electromagnet embedded in fixing block, an indicator light electrically connected to front of clamping column. The present invention solves problems of low efficiency because complicated installation and disassembly of existing device needs long time for fixing suspender on arch bridges, and reduces safety hazards of suspender falling off during construction.

Systems and methods for managing concurrent data requests

In some embodiments, systems, methods, and apparatuses are provided herein useful for managing a plurality of concurrent and nearly concurrent data requests within a computer system. The systems have a main data storage for storing source data, and a high speed, and/or remote data storage for storing computed data. In some embodiments, a combination of data filters and distributed mutex processes are used to eliminate or limit duplicate reads and writes into the high speed data storage units by ensuring only a single service module gets a lock to do the read and update of the cache; and makes it possible for keys to expire and be removed from the data filter. The systems and methods herein have various applications including retail sales environments where the requested data is related to product sales, product availability and the like.

Underwater acoustic target ranging method based on feature extraction and neural network

The present invention provides an underwater acoustic target ranging method based on feature extraction and a neural network, including: acquiring underwater acoustic signals transmitted by an underwater acoustic target at different distances, dividing data by seconds, and using data of one second as one sample; performing framing on each sample; and separately calculating a zero-crossing rate of a time domain waveform, the second, fifth, and eighth coefficients of MFCC, a spectral centroid, a spectral skewness, a spectral entropy, and a spectral sharpness for each frame of data of each sample. In the underwater acoustic target ranging method based on feature extraction and a neural network provided in the present invention, the received underwater acoustic signal data is directly processed, so that the real-time performance is high and the reaction speed is fast.

Laser radar system

Mutant of pyruvate carboxylase gene promoter and use thereof

Polynucleotide having promoter activity and application of polynucleotide in producing amino acid

Provided are a polynucleotide having promoter activity and an application of the polynucleotide in producing an amino acid. Also disclosed are a transcription expression cassette, a recombinant expression vector, and a recombinant host cell which contain the polynucleotide, and a method for enhancing expression of a target gene, a method for preparing a protein, and a method for producing an amino acid. The polynucleotide having the promoter activity is a mutant of a polynucleotide having the sequence as shown in SEQ ID NO: 9. Compared with the polynucleotide having the sequence as shown in SEQ ID NO: 9, the promoter activity of the mutant is significantly enhanced, thereby promoting the stable and efficient expression of the target gene.

Polynucleotide having promoter activity and application of polynucleotide in producing amino acid

Provided are a polynucleotide having promoter activity and an application of the polynucleotide in producing an amino acid. Also disclosed are a transcription expression cassette, a recombinant expression vector, and a recombinant host cell which contain the polynucleotide, and a method for enhancing expression of a target gene, a method for preparing a protein, and a method for producing an amino acid. The polynucleotide having the promoter activity is a mutant of a polynucleotide having the sequence as shown in SEQ ID NO: 9. Compared with the polynucleotide having the sequence as shown in SEQ ID NO: 9, the promoter activity of the mutant is significantly enhanced, thereby promoting the stable and efficient expression of the target gene.

Laser radar system

Polynucleotide having promoter activity and application of polynucleotide in producing amino acid

Systems and methods for managing concurrent data requests

In some embodiments, systems, methods, and apparatuses are provided herein useful for managing a plurality of concurrent and nearly concurrent data requests within a computer system. The systems have a main data storage for storing source data, and a high speed, and/or remote data storage for storing computed data. In some embodiments, a combination of data filters and distributed mutex processes are used to eliminate or limit duplicate reads and writes into the high speed data storage units by ensuring only a single service module gets a lock to do the read and update of the cache; and makes it possible for keys to expire and be removed from the data filter. The systems and methods herein have various applications including retail sales environments where the requested data is related to product sales, product availability and the like.

Method for depositing horizontal rib on unequal-height section by laser cladding

The present invention relates to a method for depositing a horizontal rib on an unequal-height section by laser cladding, including the following steps: providing an unequal-height section and a laser cladding device, determining a deposition position on the unequal-height section, and determining a length of a rib on the unequal-height section according to the deposition position; using a lowest point of the deposition position as a first segment of the rib and a highest point as a last segment of the rib; determining a number of segments of the rib according to the length and a vertical height of each segment of the rib; determining a cladding speed of each segment of the rib according to a relationship between a cladding height of each segment of the rib and a scanning speed under a certain parameter, and carrying out laser cladding to obtain a horizontal rib.

Polarization rotator-splitter/combiner based on silicon rib-type waveguides

Various embodiments of an integrated polarization rotator-splitter/combiner apparatus are described. An integrated polarization rotator-splitter apparatus may include an input waveguide section, a polarization rotator section, a polarization splitter section and an outgoing waveguide section, which can also be reversely connected as a polarization rotator-combiner.

Bi-directional multi-channel social media brokering

The present disclosure provides a detailed description of techniques used in systems, methods, and in computer program products for bi-directional social media broker services that connect multiple social media sites using a common management framework. The claimed embodiments address the problem of efficiently scaling and managing bidirectional interaction with multiple social media publishing channels. More specifically, the claimed embodiments are directed to approaches for a computing platform having multiple message broker modules that enable bi-directional communication of messages between a common resource manager and a plurality of social media sites. The message broker modules can receive messages in a unified message format from the common resource manager, queue the messages for asynchronous processing, translate the messages from the unified message format to a site-specific format, and deliver the translated messages to multiple social media sites.