Sausage casing threading machine

The invention relates to a device for sausage casing packaging, and particularly relates to a device for additionally arranging a plastic belt in the sausage casing. An object of the invention is to provide a sausage casing threading machine, change an operation of penetrating the belt in the sausage casing into a mechanized operation, and simultaneously to reduce the appearance of broken sausage. A speed changer protrudes out of two surfaces of a housing through a rotating shaft after the speed is changed to form two work benches with opposite surfaces. The solution can play a role of saving resource, allows one motor to drive the two work benches, and simultaneously plays a role of saving space.

Method for preparing polymer

The invention provides a method for preparing polymer by using a fluidized bed reactor; the temperature in the fluidized bed reactor is controlled to allow the temperatures at a first position, a second position, and a third position disposed orderly in a direction opposite to the material flowing direction to meet T1>T2>T3, and a value of deltaT=(T1-T2)/(T2-T3) being more than 0.5, wherein both the axial distance from the first position to the second position, and the axial distance from the second position to the third position are 0.5-6 m. Olefin polymer prepared by the method of the invention has greatly improved physical properties.

Method for preparing olefin polymer

The invention provides a method for preparing olefin polymer by a fluidized bed reactor; the temperature in the fluidized bed reactor is controlled to provide at least one low temperature area in the reactor; the polymerization temperature approaches or is equal to a dew point temperature of fluidizing gas in the reactor, particularly the temperature difference between the two is +/- 5 DEG C. According to the method of the invention, the fluidized bed reactor is operated; the polymer generated by copolymerization of ethene and alpha-olefin has a same melt index and density, and physical properties of the olefin polymer is characterized, such as tensile strength including yield strength and breaking tenacity, and falling dart impact, which are improved greatly.

Low-profile one-dimensional active transceiving phased-array antenna for satellite communication in motion

The invention discloses a low-profile one-dimensional active transceiving phased-array antenna for satellite communication in motion. The antenna comprises dual-linear-polarization antenna units in inclined and staggered arrangement, flat waveguide dual-channel feed networks, flat waveguide dual-channel miniaturized duplexers, waveguide transition and miniaturized TR components and miniaturized printed board power division networks. The units of the phased-array antenna are dual-linear-polarization waveguide radiators in triangularly inclined and rear-staggered arrangement, so that the antenna is low. By the aid of a method of sharing the same aperture for horizontal polarization and vertical polarization, aperture utilization efficiency of the antenna is increased, a flat waveguide feedback mode is adopted for both horizontal polarization and vertical polarization, loss of the feed networks is reduced, and quite high antenna efficiency is achieved. After passing through the antenna units ...

Extraction system of heparin sodium

The invention relates to an extraction system of heparin sodium, in particular to a fully-automatic unmanned automatic extraction system. The extraction system of heparin sodium, provided by the invention, changes the traditional heparin sodium processing method, realizes a fully-automatic processing technology, and actually realizes unmanned operation. By adopting electronic monitoring equipment, the system provided by the invention monitors and controls each process; and through the built-in calculation formula of an integrated control unit and the built-in proportioning scheme, the system realizes real-time monitoring and real-time operation so as to obtain higher accuracy and yield.

Gas-liquid separation apparatus

The invention relates to a gas-liquid separation apparatus, which belongs to the field of chemical machinery. The gas-liquid separation apparatus comprises an inner cylinder connected with a supply pipeline used for conveying liquid-containing air flow, an outer cylinder sleeved out of the inner cylinder at a certain interval and an eddy flow part arranged between the upstream side end of the inner cylinder and the supply pipeline, wherein the circumferential sidewall of the inner cylinder is provided with liquid discharging holes, an enclosed ring cavity is formed between the inner cylinder and the outer cylinder, and the outer cylinder is provided with liquid discharging ports. The gas-liquid separation apparatus provided by the invention has high gas-liquid separation efficiency, small air flow pressure drop and good adaptability to different production apparatuses.

Process for cooling stainless steel slag by wet method

The invention discloses a process for cooling stainless steel slag by a wet method. The process comprises the following steps of: cooling naturally for 20 to 24 hours on a cooling station after electric furnace mother solution slag is conveyed from a field; spraying for cooling for 4 to 6 hours, and controlling a slag surface, so that water is not accumulated on the slag surface; standing for 3 to 4 hours, when the maximum temperature of the walls of slag tanks is lower than 120 DEG C and the temperature of an inner core of the steel slag is lower than 300 DEG C, turning the slag over in a slag box, keeping dried in the slag box, and paving by using the massive slag; crushing the turned massive steel slag, wherein massive materials of which the diameter is smaller than 200 millimeters are taken as tank filling materials; transferring the tank filling materials into empty slag tanks to fill up the tank, wherein 3 to 5 tons of tank filling materials are added into each empty slag tank; and ...

Multi-channel combined type heart rate analysis meter for intertidal zone organisms

The invention relates to a multi-channel combined type heart rate analysis meter for intertidal zone organisms and relates to an organism physical sign monitoring instrument. The meter comprises a combined type sensor, a signal collecting and analyzing device, a universal serial bus (USB) power source/signal transmission data line and a computer, wherein the sensor is composed of a temperature sensor and a reflecting optoelectronic switch sensor heart rate determining sensor which are controlled by a unibus; the signal collecting and analyzing device comprises a pre-amplification circuit, a filter circuit, an analog-digital conversion circuit and a microprogrammed control unit circuit; an input end of the pre-amplification circuit is connected with an output end of the sensor, an input end of the filter circuit is connected with an output end of the pre-amplification circuit, an input end of the analog-digital conversion circuit is connected with an output end of the filter circuit, an ...

Entirely-stirring tank used for heparin sodium extraction process

The invention relates to a stirring tank, and particularly relates to a stirring tank body used for a heparin sodium extraction process. The problem to be solved is to provide an entirely-stirring tank used for the heparin sodium extraction process. With the adoption of the entirely-stirring tank provided by the invention, a material is sufficiently stirred while reaction time is reduced by 3-4 hours, so that the yield is higher than the yield of a traditional tank body. A pipeline opening is formed outside the tank body, and the outside of the tank body is connected with a high-pressure drainage pump at the bottom; and a valve is arranged on a pipeline. In the prior art, an auxiliary material or alkaline water needs to be manually added in a reaction process. With the adoption of the entirely-stirring tank provided by the invention, automatic stirring can be realized through one-off pouring. With the adoption of the manner, the addition is more uniform, and the reaction rate is higher.

Artificial cultivation method for hazel mushroom

The invention relates to an artificial cultivation method for hazel mushroom. The artificial cultivation method is characterized in that: the formula of hazel mushroom strain spray solution comprises the following raw materials by weight: 200g of paraquat, 200g of glyphosate isopropyl amine salt with content of 41 percent, 100g of methyl-4-chlorophenoxyacetic acid sodium, 50g of juice squeezed by using newly picked hazel nut fruiting bracts and 15kg of water; and the raw materials are mixed and uniformly stirred to prepare the hazel mushroom strain spray solution. The artificial cultivation method for the hazel mushroom comprises the following steps of: cultivating and planting from April to August each year; keeping an apparatus for spraying the hazel mushroom strain spray solution clean and sterile and spraying without pollution; closing ridges, covering soil and compacting after spraying the hazel mushroom strain spray solution; decomposing sprayed hazel mushroom strain when encountering ...

Method for preparing polymer

The invention discloses a method for preparing a polymer. According to the invention, reactants containing polymerization monomers are polymerized under the effect of a catalyst in a first zone of a tower of a fluidized bed polymerization reactor, such that a first solid polymerization substance is produced; the reactants containing the polymerization monomers flows upwards in the tower, and enters a second zone of the tower of the fluidized bed polymerization reactor, and a second solid polymerization substance is produced under the effect of a catalyst; in a circulation unit outside the fluidized bed polymerization reactor, the reactants containing the polymerization monomers form a gas-liquid mixture; the gas-liquid mixture is delivered back to a bottom zone in the tower, and is subject to gas-liquid separation; a separated liquid phase is circulated and delivered back to the first zone, and is subject to the reaction; the separated gas phase is circulated and delivered back to the second ...

Insulation construction method for frozen-earth roadbed

The invention discloses an insulation construction method for a frozen-earth roadbed, which comprises the steps of: (1) carrying out excavating and replacing-filling construction; (2) laying a sand mattress layer, an insulation board, a geotextile and a geogrid; (3) burying temperature sensors; and (4) performing regular temperature observation. The insulation construction method for the frozen-earth roadbed relates to a construction method of setting a thermal insulation layer in a permafrost section, which is capable of controlling disturbance on a permafrost layer effectively, and maintaining property stability of the permafrost layer, thereby enhancing the overall stability of a roadbed, preventing the roadbed in the permafrost section from damages of subsidence, frost heave, pavement cracking, collapse, and the like, reducing replacing-filling thickness, saving construction cost, and shorting construction period under the same conditions.

Automatic simulation device for intertidal zone environmental change

The invention discloses an automatic simulation device for intertidal zone environmental change, relating to an automatic simulation device, and providing the automatic simulation device for the intertidal zone environmental change, which can be used for simulating the intertidal zone environmental change in a laboratory environment to perform related replication experiments. The automatic simulation device is provided with a water tank, an organism carrying tray, a lighting device, a seawater circulating device, a heating device, a liquid level adjusting device, a pH (Potential of Hydrogen) value adjusting device, a salinity adjusting device, a temperature sensor, a salinity sensor, a pH composite electrode, a liquid level sensor and a control circuit, wherein the water tank is provided with a CO2 solution inlet, a helium solution inlet and a salinity adjusting solution inlet; the lighting device is provided with a lighting bracket and a florescent lamp; the seawater circulating device ...

Transmit-receive sharing dual-polarization waveguide array antenna

The invention discloses a transmit-receive sharing dual-polarization waveguide array antenna, which comprises a dual-polarization antenna unit and a waveguide feed network, wherein the dual-polarization antenna unit is composed of a radiation port, a main waveguide, a transition waveguide, a vertical polarization waveguide, a horizontal polarization waveguide and a polarization switching waveguide. A method of a horizontal polarization and a vertical polarization sharing the same one aperture is utilized, so that the aperture utilization efficiency of the antenna is increased. The horizontal polarization and the vertical polarization adopt a waveguide feed mode, so that the loss of the feed network is reduced, and the antenna has high antenna efficiency. Two polarizations to a radiation unit adopt the same polarization feed mode, wherein the vertical polarization is direct feed, the radiation to the horizontal polarization adopts the vertical polarization feed, and the horizontal polarization ...

Ultra-low side lobe adaptive digital beam forming (ADBF) method for digital array

The invention discloses an ultra-low side lobe adaptive digital beam forming (ADBF) method for a digital array. The method comprises four steps of conventional formation of a sum beam, interference airspace direction finding of a beam domain, construction of interference auxiliary beams and calculation of an adaptive weight; and specifically, the ADBF weight is calculated in a beam domain dimension reduction space for the auxiliary beams in the interference direction by using a digital array adaptive design. A theoretical analysis and a simulation result show that the algorithm adaptively inhibits interference, has good ultra-low side lobe beam shape preserving performance and is high in convergence rate, low in calculation quantity and suitable for the engineering application.

Olefin polymerization apparatus and olefin polymerization method

The invention relates to an olefin polymerization apparatus, which belongs to the field of chemical processes. The olefin polymerization apparatus comprises: a fluidized bed reactor which includes a first part located below a distribution plate and a second part located above the distribution plate; a leading-out pipeline connected with the second part of the fluidized bed reactor and a storage tank, wherein a compressor, a condenser and a gas-liquid separator are successively arranged in the leading-out pipeline, the gas-liquid separator is used for gas-liquid separation of circulating gas flow having undergone condensation, a gas flow branch pipe of the gas-liquid separator is communicated with the first part of the fluidized bed reactor, and a liquid flow branch pipe of the gas-liquid separator is communicated with the storage tank; and fluid conveying equipment connected with the outlet of the storage tank, wherein a first outlet pipeline of the fluid conveying equipment is communicated ...

Method for preparing polymer

The invention provides a method for preparing polymer; a polymerization temperature in a reactor is set to change circularly between a high temperature point and a lower temperature point; the cycle has at least one period within 6 hours; the high temperature point is higher than the low temperature point by more than 10 DEG C. Polymer prepared by the method of the invention has a ratio of flow index MI 21.6 to melt index MI 21.6 being more than 60, which indicates that the polymer has excellent processability; in addition, the polymer obtained in the invention has improved yield strength, breaking strength, and falling dart impact values when compared with the prior art, which indicates that the polymer has excellent physical properties.

Resin collecting and washing device for sodium heparin

The invention relates to a resin collecting and washing device for sodium heparin. The resin collecting and washing device adopts the technical scheme as follows: the resin collecting and washing device comprises an outer housing and an inner filter barrel, wherein charge and discharge end seals are arranged at the two ends of the outer housing respectively; a charge hole is formed in the charge end seal; a discharge hole is formed in the discharge end seal; the inner filter barrel is coaxially mounted in the outer housing and forms an annular sandwich cavity with two disconnected ends along with the outer housing; the charge hole and the discharge hole are respectively communicated with the two ends of the inner filter barrel; the discharge hole is connected with a material pump; a washing water inlet and a washing water outlet are arranged on the outer housing; and the washing water outlet is connected with a water suction pump. Wastewater in resin is filtered by the filtering effect ...

FLUIDIZED BED POLYMERIZATION REACTOR AND PROCESS FOR PREPARING POLYMER

The invention provides a fluidized bed polymerization reactor, including: a column, in which a liquid distributor and a gas distributor above the liquid distributor are arranged, so that the reaction zone being divided into a first zone and a second zone through the gas distributor; and a circulating unit for circulating the gas material originated from the top zone of the column into the bottom zone thereof in a form of gas-liquid mixture. The gas-liquid mixture is undergone a gas-liquid separation in the bottom zone, the gas phase portion obtained being fed to the gas distributor and then into the second zone while the liquid phase portion obtained being entered into the first zone through the liquid distributor, so that the temperature in the first zone is lower than that in the second zone. Therefore, polymer with a molecular weight distributed in a relatively wide range can be obtained. The invention further provides a method for preparing polymer. 124-. (canceled)25. A fluidized bed polymerization reactor , including:{'b': 1', '2', '8', '11', '12, 'a column (), in which a liquid distributor () and a gas distributor () above the liquid distributor are arranged, wherein liquid reactant is fed into a bottom zone in the column under the liquid distributor, and enters into a reaction zone above the liquid distributor after passing through the liquid distributor, the reaction zone being divided into a first zone () under the gas distributor and a second zone () above the gas distributor; and'}{'b': '20', 'a circulating unit () for circulating the gas material originated from the top zone of the column into the bottom zone thereof in a form of gas-liquid mixture,'}wherein the gas-liquid mixture is undergone a gas-liquid separation in the bottom zone, the gas phase portion obtained being fed to the gas distributor and then into the second zone while the liquid phase portion obtained being entered into the first zone through the liquid distributor, so that the ...

OLEFIN POLYMERIZATION METHOD AND SYSTEM

The present application relates to an olefin polymerization method and system in the field of olefin polymerization. The method combines a supported double catalyst with a series process, introduces a liquid material obtained after heat exchange and gas-liquid separation of a circulation gas flow into a separate first reactor to get into contact with the supported double catalyst for polymerization reaction, and then introduces the reaction material and the first polyolefin generated by reaction into a second reactor to continue polymerization reaction, thereby enabling particles to circulate between first reactor and second reactor, improving mixing effect of two polyolefins with obvious differences in properties, avoiding the occurrence of phase separation, and facilitating the production of polyolefins with excellent performance. At the same time, ethylene gas is introduced into first reactor to further reduce the hydrogen/ethylene ratio, increase the molecular weight of polyethylene and improve the product performance. 1. An olefin polymerization method , comprising the following steps:{'b': '1', 'S, compressing and condensing circulation gas flow comprising an olefin and a condensing agent exported from an outlet of a second reactor to obtain a gas-liquid mixture; carrying out gas-liquid separation of the gas-liquid mixture to obtain a gas material and a liquid material, wherein the liquid material comprises a first liquid material and a second liquid material having the same or different compositions;'}{'b': '2', 'S, conveying the gas material and the first liquid material back to the second reactor for circulation, introducing the second liquid material into a first reactor, simultaneously conveying ethylene and a catalyst into the first reactor, and polymerizing the olefin in contact with the catalyst in the first reactor to form a mixture comprising a first polyolefin;'}{'b': '3', 'S, leading out the mixture comprising the first polyolefin from the first ...

POLYETHYLENE MATERIAL AND APPLICATION THEREOF

Provided is a polyethylene material and application thereof. A density distribution of the polyethylene material is in a range of 0.880 g/cm-0.960 g/cm. An amount of a fraction at a temperature of 40° C. obtained by conducting temperature rising elution fractionation on the polyethylene material is in a range of 9.0 wt %-40.0 wt %, preferably in a range of 10.0 wt %-25.0 wt %, more preferably in a range of 9.9 wt %-20.0 wt %. A melting temperature of the polyethylene material is 110° C.-135° C., preferably 116° C.-130° C. The polyethylene material provided by the present application has distinctly improved amount of medium/low-molecular-weight fractions and high-degree-branching fractions, as well as relatively high-molecular-weight fractions which are highly branched. The polyethylene material thus has a relative high melting temperature. 1. A polyethylene material , having a density distribution in a range of 0.880 g/cm3-0.960 g/cm3; an amount of a fraction at a temperature of 40° C. in a range of 9.0 wt %-40.0 wt % , preferably in a range of 10.0 wt %-25.0 wt % , more preferably in a range of 9.9 wt %-20.0 wt % , as determined by conducting temperature rising elution fractionation on the polyethylene material , a melting temperature of the polyethylene material is in a range of 110° C.-135° C. , preferably in a range of 116° C.-130° C.2. The polyethylene material according to claim 1 , wherein the polyethylene material has an amount of a fraction at a temperature of 110° C. in a range of 8.0 wt %-30.0 wt % claim 1 , preferably in a range of 9.0 wt %-18.0 wt %.3. The polyethylene material according to claim 1 , wherein as determined by temperature rising elution fractionation claim 1 , a standard deviation of amounts of two fractions of the polyethylene material at temperatures at an interval of 10° C. from 40° C. to 110° C. is in a range of 0%-6.0% claim 1 , preferably in a range of 0.5%-3.5%.4. The polyethylene material according to claim 1 , wherein a number- ...

OLEFIN POLYMERIZATION APPARATUS AND OLEFIN POLYMERIZATION PROCESS

Provided in the present invention are an olefin polymerization apparatus and an olefin polymerization process. The following operations and effects can be realized by the apparatus or method provided in the present invention: the gas material discharged from the polymerization reactor is condensed, after the gas-liquid separation, the resulting gas portion is recycled to the reactor to form a circulation loop; the condensate can be selectively introduced to the polymerization reactor, in order to achieve the free switch between the homopolymerization reaction and the copolymerization reaction or between different copolymerization reactions, and at the same time the condensate can absorb the heat generated by the reaction. By using the apparatus and method provided in the present invention, polyolefin products having excellent mechanical properties and processability can be prepared as needed. 1. An olefin polymerization apparatus , comprising:a polymerization reactor for olefin homopolymerization and/or copolymerization reaction;a condensation unit for condensing a gas material discharged from the polymerization reactor;a gas-liquid separation unit for carrying out gas-liquid separation on the material from the condensation unit to generate a gas and a condensate;storage tanks for receiving the condensate discharged from the gas-liquid separation unit; anda control unit,wherein,the gas from the gas-liquid separation unit is introduced into the polymerization reactor, andthe condensate from the storage tanks is selectively introduced into the polymerization reactor under the action of the control unit to achieve the switch between the olefin homopolymerization and copolymerization in the polymerization reactor.2. The apparatus according to claim 1 , characterized in that claim 1 , the numbers of the storage tanks are 2 or more claim 1 , preferably 2 to 4 claim 1 , and the storage tanks are respectively used for storing the condensate containing different comonomers.3 ...

Ad collision reduction

An ad collision machine can be configured to evaluate collision queries for possible ad collisions and is associated with an ad datacenter configured to evaluate and respond to bid requests on behalf of a plurality of advertisers. The ad collision machine can comprise a plurality of nodes and a data cache containing a plurality of user ID-campaign ID keys representing recently submitted bids in response to bid requests. Once a selected node receives a collision query, a user ID-campaign ID key is retrieved from the collision query. If the first key is not found in the data cache, it is written to the data cache by the node and the ad collision machine returns that user ID-campaign ID pair as available to be bid on.

Olefin polymerization apparatus and olefin polymerization process

Polyethylene material and application thereof

Provided is a polyethylene material and application thereof. A density distribution of the polyethylene material is in a range of 0.880 g/cm 3 -0.960 g/cm 3 . An amount of a fraction at a temperature of 40° C. obtained by conducting temperature rising elution fractionation on the polyethylene material is in a range of 9.0 wt %-40.0 wt %, preferably in a range of 10.0 wt %-25.0 wt %, more preferably in a range of 9.9 wt %-20.0 wt %. A melting temperature of the polyethylene material is 110° C.-135° C., preferably 116° C.-130° C. The polyethylene material provided by the present application has distinctly improved amount of medium/low-molecular-weight fractions and high-degree-branching fractions, as well as relatively high-molecular-weight fractions which are highly branched. The polyethylene material thus has a relative high melting temperature.

Composite catalyst for production of polyethylene

A composite catalyst useful in the production of polyethylene, which comprises at least a first catalyst and a second catalyst separated by a polymer layer, with the first catalyst and the second catalyst being identical or different, is described. A composite catalyst useful in the production of polyethylene with a broad molecular weight distribution in a single polymerization reactor, which comprises at least a first catalyst and a second catalyst separated by a polymer layer, with the first catalyst and the second catalyst being different, is also described. A process for preparing said catalysts and a process for the production of a polyethylene by using said catalysts are also described.

Olefin polymerization apparatus and olefin polymerization process

Provided in the present invention are an olefin polymerization apparatus and an olefin polymerization process. The following operations and effects can be realized by the apparatus or method provided in the present invention: the gas material discharged from the polymerization reactor is condensed, after the gas-liquid separation, the resulting gas portion is recycled to the reactor to form a circulation loop; the condensate can be selectively introduced to the polymerization reactor, in order to achieve the free switch between the homopolymerization reaction and the copolymerization reaction or between different copolymerization reactions, and at the same time the condensate can absorb the heat generated by the reaction. By using the apparatus and method provided in the present invention, polyolefin products having excellent mechanical properties and processability can be prepared as needed.

Fluidized bed polymerization reactor and process for preparing polymer

The invention provides a fluidized bed polymerization reactor, including: a column, in which a liquid distributor and a gas distributor above the liquid distributor are arranged, so that the reaction zone being divided into a first zone and a second zone through the gas distributor; and a circulating unit for circulating the gas material originated from the top zone of the column into the bottom zone thereof in a form of gas-liquid mixture. The gas-liquid mixture is undergone a gas-liquid separation in the bottom zone, the gas phase portion obtained being fed to the gas distributor and then into the second zone while the liquid phase portion obtained being entered into the first zone through the liquid distributor, so that the temperature in the first zone is lower than that in the second zone. Therefore, polymer with a molecular weight distributed in a relatively wide range can be obtained. The invention further provides a method for preparing polymer.

Olefin polymerization method and system

The present application relates to an olefin polymerization method and system in the field of olefin polymerization. The method combines a supported double catalyst with a series process, introduces a liquid material obtained after heat exchange and gas-liquid separation of a circulation gas flow into a separate first reactor to get into contact with the supported double catalyst for polymerization reaction, and then introduces the reaction material and the first polyolefin generated by reaction into a second reactor to continue polymerization reaction, thereby enabling particles to circulate between first reactor and second reactor, improving mixing effect of two polyolefins with obvious differences in properties, avoiding the occurrence of phase separation, and facilitating the production of polyolefins with excellent performance. At the same time, ethylene gas is introduced into first reactor to further reduce the hydrogen/ethylene ratio, increase the molecular weight of polyethylene and improve the product performance.

Olefin polymerization apparatus and olefin polymerization process

Provided in the present invention are an olefin polymerization apparatus and an olefin polymerization process. The following operations and effects can be realized by the apparatus or method provided in the present invention: the gas material discharged from the polymerization reactor is condensed, after the gas-liquid separation, the resulting gas portion is recycled to the reactor to form a circulation loop; the condensate can be selectively introduced to the polymerization reactor, in order to achieve the free switch between the homopolymerization reaction and the copolymerization reaction or between different copolymerization reactions, and at the same time the condensate can absorb the heat generated by the reaction. By using the apparatus and method provided in the present invention, polyolefin products having excellent mechanical properties and processability can be prepared as needed.

Olefin polymerization apparatus and olefin polymerization process

Ad collision reduction

An ad collision machine can be configured to evaluate collision queries for possible ad collisions and is associated with an ad datacenter configured to evaluate and respond to bid requests on behalf of a plurality of advertisers. The ad collision machine can comprise a plurality of nodes and a data cache containing a plurality of user ID—campaign ID keys representing recently submitted bids in response to bid requests. Once a selected node receives a collision query, a user ID—campaign ID key is retrieved from the collision query. If the first key is not found in the data cache, it is written to the data cache by the node and the ad collision machine returns that user ID—campaign ID pair as available to be bid on.

Ad collision reduction

An ad collision machine can be configured to evaluate collision queries for possible ad collisions and is associated with an ad datacenter configured to evaluate and respond to bid requests on behalf of a plurality of advertisers. The ad collision machine can comprise a plurality of nodes and a data cache containing a plurality of user ID—campaign ID keys representing recently submitted bids in response to bid requests. Once a selected node receives a collision query, a user ID—campaign ID key is retrieved from the collision query. If the first key is not found in the data cache, it is written to the data cache by the node and the ad collision machine returns that user ID—campaign ID pair as available to be bid on.

Ad collision reduction

An ad collision machine can be configured to evaluate collision queries for possible ad collisions and is associated with an ad datacenter configured to evaluate and respond to bid requests on behalf of a plurality of advertisers. The ad collision machine can comprise a plurality of nodes and a data cache containing a plurality of user ID-campaign ID keys representing recently submitted bids in response to bid requests. Once a selected node receives a collision query, a user ID-campaign ID key is retrieved from the collision query. If the first key is not found in the data cache, it is written to the data cache by the node and the ad collision machine returns that user ID-campaign ID pair as available to be bid on.

مفاعل بلمرة للطبقة المميعة وطريقة لتحضير البوليمر

يوفر الاختراع مفاعل لبلمرة الطبقة المميعة Fluidized bed polymerization reactor، يتضمن: عمود، والذى به موزع سائل وموزع غاز يتم ترتيبه فوق موزع السائل، بحيث يتم تقسيم منطقة التفاعل إلى منطقة أولى ومنطقة ثانية خلال موزع الغاز؛ ووحدة تدوير لتدوير مادة الغاز الناتجة من المنطقة العلوية من العمود إلى المنطقة السفلية منه في شكل خليط غاز- سائل. يخضع خليط الغاز- السائل إلى فصل غاز- سائل في المنطقة السفلية، يتم تغذية جزء طبقة الغاز الناتج إلى موزع الغاز ثم إلى المنطقة الثانية في حين يتم إدخال جزء الطبقة الثانية الناتج إلى المنطقة الثانية من خلال موزع السائل، بحيث تكون درجة الحرارة في المنطقة الأولى أقل منها في المنطقة الثانية. وبذلك، يمكن الحصول على بوليمر بوزن جزيئي موزع بمدى واسع نسبياً. يوفر الاختراع أيضاً طريقة لتحضير البوليمر polymer.