Vehicle anti-theft method and device

The invention relates to the technical field of automobiles, and discloses a vehicle anti-theft method and device.The method is executed by a first controller in a vehicle and comprises the steps that state parameters of the vehicle are obtained, the state parameters are used for indicating the state of the vehicle, and the state parameters change along with time; generating first verification information according to the state parameter; the first verification information and second verification information are verified, the second verification information is generated by a second controller according to the state parameters, and the second controller is different from the first controller; and in response to matching of the first verification information and the second verification information, starting the vehicle. According to the vehicle anti-theft method and device, anti-theft verification between the controllers can be completed without writing information into the controllers in ...

High-temperature heat treatment method for mercury cadmium telluride material

A high-temp heat treatment method for Te-Cd-Hg material features that said heat treatment is completed in quartz ampoule which contains Te-containing Hg source as heat-treating source and Te source and protecting gas to suppress the absolute evaporated amount of surficial atoms of Te-Cd-Hg material. After heat treatment, the dislocation of Te-Cd-Hg material is lowered by about one order of magnitude while the surficial appearance integrity is retained well. Said method is also suitable for high-temp electric activation of doped atoms in Te-Cd-Hg material.

Vacuum heat treatment process of mercury-cadimium-telluriurm molecular beam epitaxial material

VESSEL TYPE IDENTIFICATION METHOD USING COARSE-TO-FINE CASCADED CONVOLUTIONAL NEURAL NETWORK

Disclosed is a vessel type identification method using a coarse-to-fine cascaded deep convolutional neural network. The method adopts a random heuristic selection mechanism to dynamically tune the structure and parameter settings of a depth network, and through coarse-step training and fine-step training, the method may obtain a deep convolutional neural network which may identify vessel types. In the method, the coarse-step training process is identical to the training process of a conventional deep convolutional neural network, and the samples inputted during the training process are vessel images. During the fine-step training process, the deep convolutional neural network is re-trained using the images of commercial ships with the lowest vessel type identification precision derived during the coarse-step training process so as to enhance the overall precision of vessel type identification. The method as disclosed may achieve a better identification precision for different vessel types and thus offers information support to automated vessel type identification and smart vessel sailing.

Graphite boat for improving mercury cadmium telluride rheotaxy membrane surface shape

Method for setting tea tree nursery garden seedbed

The invention provides a method for setting a seed bed inside a tea nursery, which is essentially characterized in that: (1) the seed bed is set to be kyphosis-shaped, that is, high in middle and lower in both sides; (2) a shading trellis is arranged above the seed bed; (3) yellow soil is spread on the border field and acidity of soil is maintained. The method has the advantages that: (1) the border field of the seed bed is kyphosis-shaped and no water is accumulated on the border field, which ensures full development of seedling root system and high survival rate of seedlings. In addition, uneven border field is favorable to ventilate, thus ensuring fast growth and nursery of the seedlings, so the method is applicable to the cuttage method of short sprout and shoot; the yellow soil is spread on the border field, which ensures that the acidity of the soil on the seed bed is maintained, which is applicable to the growth of new root and survival of the seedlings; a shade net is used for shading ...

Silicon based substrate mercury cadmium telluride rheotaxial growth method

开管式碲镉汞外延材料热处理方法

... 本发明公开了一种开管式HgTe源碲镉汞外延材料热处理方法，热处理所需的稳定的汞蒸气压采用石墨盒的结构来提供，石墨盒也可通过改进液相外延的石墨舟来实现，开管工艺为材料的批量生产化提供了一种途径。用该工艺进行空穴导电型热处理的成功率达100％，材料在77K温度下的空穴浓度可在5×10#+[15]到5×10#+[16]cm#+[-3]范围内随意控制。同时，热处理过程中材料表面的位错不产生增值效应，材料的组分和表面形貌的完整性也得到了很好的保持。 ...

Corrosive agent and corrosion method for II-VI family semiconductor material line defect display

The invention discloses a corrosive agent which is used for showing the dislocation of II-VI group semiconductor materials and the corrosive agent is provided with the component ratio of 80ml: 6 to 10ml: 10 to 15ml: 0 to 5ml: 5.1g: 2.0 to 7.0g of H2O to HCl to HNO 3 to HF to K2Cr2O7 to CrO3; wherein, the II-VI group semiconductor materials are ZnyCd1-yTe materials and Hg1-xCdxTe thin film materials which develop by taking the ZnyCd1-yTe materials as the substrate extension; the corrosion method comprises the pretreatment of the eroded samples, the dislocation erosion and the post treatment of the eroded samples; compared with two present common Schaake and Chen corrosive agents specially used for showing the dislocation of the Hg1-xCdxTe thin film materials, the invention has the advantages of bigger shape of a corrosive pit and clear rules and background, and showing the dislocation corrosive pit of the substrate materials Cd1-yZnyTe, which has great significance in the study of the dislocation ...

Driving kinetic energy recovery method, device, equipment, medium and program product

The invention discloses a driving kinetic energy recovery method, device and equipment, a medium and a program product, and relates to the field of electric vehicle driving kinetic energy recovery. The method comprises the steps that first vehicle driving information of the electric vehicle in a first driving period is obtained, in response to a received driving kinetic energy recovery request, a first driving working condition of the electric vehicle in the first driving period is determined based on the first vehicle driving information, and target power generation torque is determined based on the first vehicle driving information and the first driving working condition; and controlling the electric vehicle to perform driving kinetic energy recovery based on the target power generation torque. Safety accidents and energy (including kinetic energy and electric energy) conversion loss caused by driving kinetic energy recovery under the condition that driving kinetic energy recovery is ...

A elasticity abrasive disc for stone material is polished

The utility model provides an elasticity abrasive disc for stone material is polished, includes the abrasive disc base member and sets up gerar grinding on the abrasive disc base member, the abrasive disc base member is circular cymbals column structure, including the installation through -hole that confession grinding device is fixed that is used for the grinding face of polishing and sets up in centre of a circle department, the gerar grinding is the secter pat column structure, along the horizontal align to grid of abrasive disc base member is covered with whole grinding face, the abrasive disc base member is being close to installation through -hole position is equipped with the installation department, two complete parallels of face around the installation department. The utility model discloses a set up alternate fan -shaped gerar grinding on the abrasive disc base member, when carrying out burnishing and polishing to the stone material, it is not enough to eliminate the chip removal ...

Hole conduction mercury cadimium-tellurium epitaxial material heat treatment process and device

Formula of cutting blade for hot cutting casting piece and machining method

The invention relates to a formula of a cutting blade for a hot cutting casting piece and a machining method. The formula comprises the following components of, by weight ratio, 20%-40% of chrome corundum with granularity 24 mesh, 5%-25% of iridium-plating brown fused alumina with granularity 24 mesh, 5%-25% of iridium-plating brown fused alumina with granularity 30 mesh, 5%-25% of iridium-plating brown fused alumina with granularity 36 mesh, 3.0%-5.5% of liquid phenolic resin, 7.5%-10.5% of powder phenolic resin with granularity 200-300 mesh, 2.0%-5.0% of potassium sulphate with granularity 150-200 mesh, 1.0%-3.0% of pyrite powder with granularity 325-400 mesh, 3.0%-8.0% of calcium sulfate whisker with granularity 80-150 mesh and 0.2%-0.8% of carbon black with granularity 325-400 mesh. The formula of the cutting blade for the hot cutting casting piece and the machining method have the advantages that the formula by using multiple materials in a mixed mode mixed is adopted, the resin grinding ...

Corrosive agent and corrosion method for II-VI family semiconductor material dislocation display

A elasticity abrasive disc for stainless steel is polished

The utility model provides an elasticity abrasive disc for stainless steel is polished, the gerar grinding is including setting up grinding face one side and by to the inside concave yield of abrasive disc base member with the abrasive disc base member radially radiate linear dimpled grain and with the installation through -hole of abrasive disc base member is the crossing trapezoidal massive structure that forms of cutting apart of the cyclic annular dimpled grain of concentric circles, along the abrasive disc base member is sun line pattern regular spread and is covered with whole grinding face. The utility model discloses a set up the trapezoidal gerar grinding that is sun line pattern regular spread on the abrasive disc base member, when carrying out burnishing and polishing to the stainless steel, it is not enough to eliminate the chip removal through the clearance between the gerar grinding, and abrasive disc heat dissipation simultaneously is better, can effectively improve the precision ...

Three swords combination scraper

The utility model provides a three swords combination scraper, includes locating support and three scrapers, and the head fixed connection of three scrapers is 120 contained angle evenly distributed between the head of scraper on the locating support, and every bottom the scraper keeps on same horizontal plane for strickleing off of emery wheel shaping middlings material. In strickleing the operation off the relative die rotation a week of three swords combination scraper be equivalent to ordinary scraper regional stand material cubic here promptly to sand material tissue in guaranteeing the mould evenly and in the sand material surfacing has shortened the stand material time effectively, has promoted the shaping efficiency of emery wheel, can reach very good result of use in the forming process of big emery wheel in batches.

Method and system for diagnosing vehicle data by using mobile terminal

The invention provides a method for diagnosing vehicle data by using a mobile terminal, which comprises the following steps of: downloading diagnosis software on the mobile terminal; integrating a Bluetooth conversion module to a vehicle-mounted Bluetooth device or integrating a USB (universal serial bus) conversion module to a vehicle-mounted USB device; reading the vehicle data from VMS (velocity-measuring system) through a CAN (controller area network) bus when the mobile terminal is communicated with the vehicle-mounted Bluetooth device through the Bluetooth apparatus thereof or connected to the vehicle-mounted USB device through the USB data line; and converting the format of the read vehicle data through the Bluetooth conversion module or the USB conversion module, then sending the data to the diagnosis software on the mobile terminal. Correspondingly, the invention provides a system for diagnosing vehicle data by using the mobile terminal. The vehicle data can be read to the mobile ...

Method for improving anaerobic digestion efficiency of molasses alcohol wastewater by using streptozoon GXU-A4

The invention belongs to the technical field of sewage treatment. The invention relates to a method for improving the anaerobic digestion efficiency of molasses alcohol wastewater by using streptozotoci GXU-A4, which comprises the following steps: mixing the streptozotoci GXU-A4 with molasses alcohol wastewater, and inoculating granular sludge for co-digestion. In the anaerobic digestion process of the molasses alcohol wastewater, the inhibition effect caused by the high C/N ratio of the molasses alcohol wastewater is effectively relieved due to the addition of the streptozotoci GXU-A4, the digestion efficiency of the molasses alcohol wastewater is remarkably improved, the hydrolytic acidification efficiency of granular sludge on organic matters in the wastewater is promoted, meanwhile, the methane potential of the organic matters can also be improved, and the anaerobic digestion efficiency of the molasses alcohol wastewater is improved. And a new method is provided for full recycling of ...

Heat treating appts. for mercury-cadmium tellurid

Method for monitoring short-circuit fault of current sensor of electric vehicle

The invention provides a method for monitoring short-circuit fault of a current sensor of an electric vehicle to realize state monitoring of an electric vehicle battery current sensor. The method comprises the following steps: a monitor unit detecting voltage of two signal lines of a current sensor as well as battery current value detected by the current sensor; the monitor unit determining that the current sensor has short-circuit fault when the voltage value of the two signal lines of the current sensor exceeds a preset range, or the battery current value detected by the current sensor exceeds an allowable range, or the battery current value detected by the current sensor is negative in both charging and discharging process of the battery. The method provided by the invention can determine whether the current sensor has the short-circuit fault by detecting voltage of the signal lines of the current sensor as well as the battery current value, and can remind a driver through an alarm device ...

Marine ecological environment monitoring wireless sensor network node positioning method

The invention relates to a marine ecological environment monitoring wireless sensor network node positioning method, which takes real-time movement of nodes and path loss and absorption effect of underwater communication into consideration, and performs joint estimation on node positions and path loss factors; an original non-convex problem is converted into a non-negative constraint least square framework, and an ocean node position optimal solution is searched based on two stages of an interior point method and a block coordinate updating method; in the first stage, a penalty function is used for reexpressing the problem according to an interior point method, and an approximate solution is solved; and in the second stage, the original problem is converted into a generalized trust region sub-problem, an approximate solution obtained by an interior point method is used as initial estimation of the second stage, iterative solution is carried out by combining a block coordinate updating method ...

Numerical control tool turret

The invention relates to the technical field of tool turrets, in particular to a numerical control tool turret. The tool turret comprises a tool apron, a tool disc, a pressing gear ring and a driving mechanism, a fixed gear ring is fixed to the tool apron, and the rear end of the fixed gear ring is attached to the tool apron; a movable gear ring is coaxially fixed to the end, close to the tool apron, of the cutter head. The pressing gear ring is arranged in the tool apron in a sliding mode, the pressing gear ring, the fixed gear ring and the movable gear ring are coaxially arranged, and the pressing gear ring can be meshed with the fixed gear ring and the movable gear ring. The driving mechanism is located in the tool apron and used for driving the pressing gear ring to reciprocate in the axial direction of the pressing gear ring so that the pressing gear ring can abut against or be away from the front end of the fixed gear ring. The cutter head locking device has the advantages of good ...

Calculation and alarm device for service life of battery of pure electric vehicle and control method thereof

The invention relates to a battery service life calculation of a purely electric vehicle, an alarm device and a control method thereof. The service life of the battery of the electric vehicle is estimated through prediction of battery performance. The battery performance is predicted by adding the times of deep charge-discharge cycles of the battery, and when the times of deep charge-discharge cycles of the battery reaches a certain threshold value, a vehicle is supposed to warn a driver to replace a high-power vehicle battery.

Application method of drop aeration-high depth composite undercurrent constructed wetland technology in rural domestic sewage treatment

The invention relates to an application method of a drop aeration-high depth composite undercurrent constructed wetland technology in rural domestic sewage treatment. The problems that the rural domestic sewage is treated and the environmental pollution is reduced are effectively solved. The method is as follows: rural domestic raw water is treated by a grating and then is fed to a regulating reservoir so as to be treated, sludge is fed to a sludge tank, and is treated so as to be transported out, sewage treated by the regulating reservoir flows into a drop landscape facility so as to be treated, and then flows into a drop aeration-high depth composite undercurrent constructed wetland system, and the treated sewage meets the drainage requirement and is drained or recycled. The method provided by the invention has the advantages that the method is novel and unique, equipment is easily manufactured, the treatment efficiency is high, the quality is good, the land occupation area is reduced ...

Vacuum heat treatment process of molecular beam epitaxial TeCdHg material

The heat treatment is completed inside the vacuum cavity for molecular beam epitaxy or vacuum quartz ampoule, and the CdTe covering layer required by the heat treated specimen is prepared through direct growth after epitaxy without outer contamination. The said technological process can perform hole conducting heat treatment with successfulness of 100% and the hole density may be controlled at will in the range of 5x10 to the power 15-16 cu.cm. At the same time, the material component and surface integrity is well kept.

Barrier enhanced composite current collector, preparation method thereof, electrode and battery

The invention provides a barrier enhanced composite current collector, a preparation method thereof, an electrode and a battery. The barrier reinforced composite current collector comprises a polymer substrate, a barrier layer and a metal conductive layer, the barrier layer covers at least one side surface of the polymer substrate, the metal conductive layer is arranged on one side, far away from the polymer substrate, of the barrier layer, and the material of the barrier layer comprises an amorphous alloy material. The amorphous alloy material is arranged between the polymer substrate and the metal conductive layer, so that electrolyte permeation can be effectively blocked under the condition that the mechanical property and the conductive property of the barrier reinforced composite current collector are basically not influenced, and the long service life of the barrier reinforced composite current collector is prolonged.

Wireless sensor network technology based method for designing inland-river management information system

The invention discloses a wireless sensor network technology based method for designing an inland-river management information system. The system mainly comprises a shipborne information acquisition and display platform, a water environment acquisition analysis unit, other information acquisition units, a network base station, a middleware system, a local navigation networking management center and an internet management center. In the invention, through arranging a lot of various kinds of sensors on inland ships, on buoys or floats in a navigation channel, on bridges, on elevated antennas and under the inland-river water or on the river bed and through carrying out multi-hops self-organized network by utilizing a Zigbee network communication protocol, a comprehensive and tridimensional monitoring of the inland ships, the navigation channel and the water area can be realized; therefore, the navigation safety of the inland ships and the environmental cleanness of the inland waters can be ...

Electric putter motor drive's simple and easy lift stops layer and prevents protection device that falls

Electric putter motor drive's simple and easy lift stops layer and prevents protection device that falls hits board, guide rail, two car fixed plates including electric putter motor, linkage pivot subassembly, two connecting rods, two thongs round pin axle, travel switch, switches, the one end of two connecting rods articulates respectively on linkage pivot subassembly, and the other end of two connecting rods corresponds articulatedly with two thongs round pin axle respectively, all install the switch on two connecting rods and hit the board, install on the car is put the beams in place and hit the travel switch that the board corresponds with the switch, two car fixed plates are fixed respectively on the guide rail of car both sides, simple and easy lift stop under the stratiform attitude with two a thongs round pin axle one -to -one. This device drives the bolt axle through the electric putter motor and inserts and extract the car fixed plate, simultaneously with return circuit switch ...

Formula and machining method of cutting piece for titanium alloy

The invention discloses a formula of a cutting piece for titanium alloy. The formula comprises, by weight, 46%-60% of 46 mesh monocrystalline fused alumina, 10%-20% of 60 mesh iridium-plated white fused alumina, 2.0%-8.0% of 150 mesh-180 mesh green silicon carbide, 4.5%-7.5% of 1800 mPa.s-2000 mPa.s liquid phenolic resin (25 DEG C), 9.0%-15.0% of 200 mesh-300 mesh powdery phenolic resin, 5.0%-15.0% of 325 mesh-400 mesh potassium fluoroaluminate and 0.2%-0.8% of 325 mesh-400 mesh carbon black. The formula has the advantages that by the adoption of the formula with several materials mixed in use, the special resin grinding wheel cutting piece for the titanium alloy is manufactured through a specific hot-pressing technology and can meet the requirement for efficiently cutting titanium alloy workpieces; in the cutting process, the product is smooth in feeding, free of blockage and good in heat dissipation and will not burn out the workpieces, cuts are narrow, section burrs are small, durability ...

Indicator lamp synchronization method and device of LED display screen and computer equipment

The invention relates to an indicating lamp synchronization method and device of an LED display screen, computer equipment, a storage medium and a computer program product. The method comprises the following steps: receiving video data, analyzing a video data packet of each display unit, filling the video data packet with a generated synchronization signal parameter to form updated video data, sending the updated video data packet to each display unit, receiving the updated video data packet by each display unit, and sending the updated video data packet to the display unit. And according to the synchronization signal parameter in the updated video data packet, refreshing the indicating lamp of each display unit. Because the video data sent to each display unit is the same, each display unit can synchronously receive the synchronous signal parameter and synchronously refresh the state of the indicating lamp, so that the indicating lamp of each display unit can synchronously display.

Battery charging heat preservation control system and method

The invention provides a battery charging heat preservation control system and method. The battery charging heat preservation control system comprises a charger, a direct-current converter, a vehicle control unit and a battery management system. The battery management system is regularly awakened to detect whether the battery pack has a heating requirement or not after the battery pack is charged, if the battery pack has the heating requirement, the battery management system awakens the vehicle control unit, the charger and the direct current converter, and meanwhile, the battery management system requests the charger to output constant voltage to the battery pack; the battery pack is heated; in the heating process of the battery pack, the vehicle control unit sends out a direct-current converter enabling signal according to the high-voltage output state and the battery heating state collected by the direct-current converter, and the direct-current converter enabling signal is used for ...

Software mistaken-swiping prevention method and system applied to after-sales market

The invention belongs to the technical field of vehicle software brushing and writing, and relates to a software mistaken brushing prevention method and system applied to an after-sales market, after brushing and writing equipment is in communication connection with a production management system and is connected with a vehicle, the following steps are executed: obtaining a VIN code of the whole vehicle, and determining identification information of the current vehicle according to the VIN code; according to the identification information, an ECU supporting flashing in the vehicle is obtained from a production management system; and receiving confirmation information of the ECU to be flashed and written, judging whether the ECU to be flashed and written accords with a flashed and written condition or not, and if the ECU to be flashed and written accords with the flashed and written condition, transmitting the corresponding software updating package to the ECU to be flashed and written.

Tribonema, culture method thereof and functional feed prepared from tribonema

The invention relates to the technical field of aquatic feed. The invention provides tribonema, a culture method thereof and a prepared aquatic functional feed. The tribonema has the preservation name of tribonema GXU-A10, the Latin is Tribonemasp.GXU-A10, the preservation date is January 6, 2023, the preservation unit is the China Center for Type Culture Collection, and the preservation number is CCTCCM2023047. The tribonema provided by the invention is rich in various nutrients and active ingredients such as palmitoleic acid, EPA (eicosapentaenoic acid), chrysophyta laminarin and the like. The immunopotentiator can be used for improving the growth performance of tilapia mossambica and accelerating the growth speed; the antioxidant capacity of the tilapia mossambica is enhanced, the capacity of the tilapia mossambica for resisting external environment pressure in the breeding process is improved, lipid deposition of livers and susceptibility to pathogenic microorganisms are reduced, and ...

Heat treating apparatus for mercury self sealed mercury-cadmium tellurid for switching transistors

A heat treating apparatus for Te-Cd-Hg material is composed of specimen holder, sealing hood, annealing tube, stainless steel sealing joint, diaphargm valve and air pumping pipe. The Hg source is also used as the self-sealing medium of sealing hood, so forming an annealing apparatus both in open mode and with enclose function. The apparatus is suitable for heat treatment of N-type Te-Cd-Hg molecular beam epitaxy material, liquid epitaxy material, organic chemical metallic gas-phase deposit material and block of Te-Cd-Hg material to regulate the carrier concentration.

Ship network construction method based on radio frequency identification and cloud computing

The invention relates to a ship network construction method based on radio frequency identification and cloud computing. A network structure consists of a cloud platform, a middleware system, a ship management center, a data acquisition and transmission system, a network fixed base station and shipborne radio frequency equipment; a data acquisition system of a ground base station scans a shipborne radio frequency signal in an area and transmits the signal to the ship management center; the ship management center transmits data to a data analysis and storage system of the cloud computing platform in real time through the middleware system; and the cloud computing platform acquires related information of ships, converts the information into data information which can be identified by the ground base station, and returns the data information to the ship management center. An inland ship management information system which is constructed on the basis of radio frequency identification (RFID) ...

Intelligent networked automobile information security protection method and system

The invention belongs to the technical field of intelligent networked automobile information security, and particularly relates to an intelligent networked automobile information security protection method and system. The method comprises the following steps: acquiring risk item data related to automobile information safety in real time; based on a preset information security matrix model, determining an information security risk according to the risk item data; wherein the information security matrix model comprises a plurality of risk items and risk identification standards thereof, and the plurality of risk items are divided into different levels of security domains. According to the intelligent network connection automobile information safety protection method and system, different levels of safety domains are divided according to different subsystems of information safety, a unified information safety matrix model is established, and an omnibearing information safety monitoring and ...

Automatic put packing ring device

The utility model relates to an automatic put packing ring device, conveyor involving vibrations dish, running device includes the fixed plate, and the rotary disk is installed on fixed plate upper portion, and two sets of packing ring dead lever devices are installed on rotary disk upper portion, the fixed plate lower part install with the revolving cylinder that the rotary disk is connected, top packing ring cylinder sets up the movable rod is installed to the fixed plate lower part on the cylinder pole on top packing ring cylinder upper portion, the vibration dish with two sets of packing ring fixing device pass through the packing ring groove and connect, the fixed quarter butt that packing ring dead lever device was used including the cover packing ring, advancing device is connected including impeing the cylinder, impeing the cylinder and inhale the packing ring cylinder, inhales packing ring cylinder lower part and installs the sucking disc, it sets up the emery wheel grinding apparatus ...

Marine sensor network positioning method with uncertain parameters

The invention relates to an ocean sensor network positioning method with uncertain parameters, and the method comprises the following steps: S1, constructing a distance measurement model based on the received signal strength according to the signal propagation loss; s2, selecting a reference node, performing difference operation on a distance measurement model of the reference node, introducing a natural constant, constructing a difference distance measurement model, and solving an initial position of a target by adopting a linear unbiased estimation method; s3, establishing a target optimization function taking a path loss factor as a variable to be solved based on the initial position of the target, constructing a constraint, and solving an optimal path loss factor by adopting an improved whale optimization algorithm; and S4, reconstructing the differential distance measurement model based on the optimal path loss factor, and solving the reconstructed differential distance measurement ...

A elasticity abrasive disc for cast iron is polished

The utility model provides an elasticity abrasive disc for cast iron is polished, including abrasive disc base member and the polish line of setting on the abrasive disc base member, this abrasive disc base member is circular shape cymbals column structure, including the installation through -hole that confession grinding device is fixed that is used for the grinding face of polishing and sets up in centre of a circle department, the line of should polishing is including setting up in the grinding face one side and to vertical dimpled grain and horizontal dimpled grain of the inside concave yield of abrasive disc base member, and vertical dimpled grain is parallel to each other perpendicularily and the spaced is covered with whole grinding face, and horizontal dimpled grain parallel just spaced horizontally is covered with whole grinding face, vertical dimpled grain of setting up and horizontal dimpled grain crossing and constitute a plurality of rectangle pieces on the grinding face. The ...

Tea tree short sprout tender lateral branch cuttage

The invention discloses a cuttage breeding method of tea short sprout and lateral shoot, which comprises cultivation of cutting tea in a cutting tea garden, establishment of a seed bed, cuttage and seedling protection and is characterized in that: the short sprout and lateral shoot are adopted in cutting. The steps of the breeding method are that: (1) heavy subsoil is applied 10-15 days before picking spring tea; (2) after picking spring tea, pruning is processed at once and promoting fertilizer for leaf surface is sprayed, and then axillary bud grows to be the tea cutting; (3) when the tea cutting grows up to 30-50cm and terminal leaf bud still grows, top pruning is processed to promote lateral bud of the tea cutting to sprout; (4) when the lateral shoot on the tea cutting grows up to 10-15cm, cutting and cuttage can be processed. The method has the advantages that: in normal management condition, survival rate reaches more than 95 percent and nursery rate is up to more than 90 percent ...

High-temperature heat treatment method for mercury cadmium telluride material

Vehicle-mounted multi-temperature-zone automatic air conditioner control method and device

The invention provides a vehicle-mounted multi-temperature-zone automatic air conditioner control method, which belongs to the field of vehicle-mounted air conditioner control, and is characterized in that an infrared temperature sensor is utilized to obtain the body surface temperature of a passenger, and the body surface temperature is compared with a proper temperature to obtain a comparison result, so that whether the body surface temperature of the passenger is proper or not is judged according to the comparison result; therefore, the corresponding air conditioner air outlet can be accurately adjusted according to the body surface temperature of the passenger, and the adjusting accuracy of the multi-temperature-zone automatic air conditioner is improved.

Calculation and alarm device for service life of battery of pure electric vehicle and control method thereof

The invention relates to a calculation and alarm device for the service life of a battery a pure electric vehicle and a control method thereof. The service life of the battery of the electric vehicle is estimated through prediction of battery performance. The battery performance is predicted by adding the times of deep charge-discharge cycles of the battery, and when the times of deep charge-discharge cycles of the battery reaches a certain threshold value, a vehicle is supposed to warn a driver to replace a high-power vehicle battery.

Electric vehicle lane departure early warning correction method and device

The invention provides an electric vehicle lane departure early-warning correction method and device, and belongs to the technical field of electric vehicle driving assistance. When a vehicle can execute a lane departure early-warning correction function, corresponding preset triggering conditions are determined according to different function intensity levels, and when the preset triggering conditions are met, the lane departure early-warning correction function is executed. Initial lane departure early warning corresponding to the function intensity level is executed, when execution exceeds a preset time threshold value but the vehicle still has a lane departure condition, it is indicated that a driver does not respond to the initial lane departure early warning, and at the moment, enhanced lane departure early warning is further executed; if the driver does not respond to the enhanced lane departure warning, lane departure correction is performed. The electric vehicle lane departure ...

Hardware-in-the-loop test system, method and equipment and storage medium

The invention discloses a hardware-in-the-loop test system, method and device and a storage medium, and belongs to the technical field of vehicles. A first test device in the system obtains operation information of a virtual vehicle based on a whole vehicle dynamics model, and sends the operation information to a second test device. The second test equipment generates a plurality of test sequences based on the plurality of test variables and the corresponding first variable values, generates a plurality of test cases based on the plurality of test sequences, and generates a first control instruction based on test steps in the test cases, and the test cabinet controls the running state of the virtual vehicle based on the first control instruction to obtain test data. And the second test device stores the test data and continues to test the vehicle control unit according to the test steps. According to the system, the test data acquired by the first test equipment is stored in the second ...

Metalization hatch method for cadmium telluride passivating film of mercury cadmium telluride infrared detecting chip

The invention discloses a metalized opening method of a mercury cadmium telluride passive film in a mercury cadmium telluride infrared detection chip. The method relates to a preparation technology of an HgCdTe infrared focal plane detector, in particular comprising the preparation of a selective etching solution of a CdTe passive film of the HgCdTe detection chip and a method for using the etching solution to carry out the metalized opening of the detector chip. The result shows that the etching solution has a high etching selective ration on CdTe and HgCdTe materials, and is stable with controllable etching speed. The opening method is a stable and convenient technology, has no effect on other surface treatment technologies, facilitates the improvement of surface properties of a device, improves technological stability and is vital to realize the application of CdTe passivation to a focal plane device.

Hole conduction tellurium-cadimium-mercury epitaxy material heat treatment process and device thereof

The present invention provides a heat treatment process for long-wave Te-Cd-Hg epitaxial material and its equipment. Said heat treatment process consists of six portions of sample surface treatment, heat treatment device treatment, chip-charging, system vacuum-pumping, heat treatment condition selection and quenching-taking-out. Said invention can be used for regulating N-type material grown up by using molecular beam epitaxy (MBE) technology, and its hole concentration is regulated to (77K working temp.)_ 0.8-2X10 to the power 16 cm to the power 13 or so, and its hole mobility is greater than 500 cm to the power 2/VS, so that it can make the long-wave Te-Cd-Hg MBE material meet the requirements for application of infrared focal plane device of N-on-P structure.

一种用于碲镉汞液相外延薄膜材料生长的带有母液清除装置的石墨舟

... 本发明公开了一种用于碲镉汞液相外延薄膜材料生长的带有母液清除装置的石墨舟，包括：底板、滑块以及固定底板和滑块的底座，底板上开有一孔道，孔道内置有调节衬底与孔道口高度的石英垫片，石英垫片上放置衬底。滑块上开有放置母液的孔道，它的特征是：在孔道的后面与底板相接触的滑块面上开有二个长方形的小槽，小槽的长度方向与滑块的移动方向相垂直，小槽是通过滑块的移动来完成收集外延薄膜生长结束后残留在薄膜上的母液。采用本装置可生长出表面如镜面一样光亮，无沾液的HgCdTe液相外延层，而且本装置也适用于II-VI族或III-V族化合物半导体的液相外延层上残留母液的去除。 ...

Electric vehicle collision signal remote diagnosis system

The invention belongs to the category of vehicle safety technologies in the field of electric vehicle control, and particularly relates to an electric vehicle collision signal remote diagnosis system. The remote diagnosis system comprises a collision switch arranged at the front end of a vehicle, the collision switch transmits a collision signal to a vehicle control unit, the vehicle control unit obtains vehicle data from a sensor, stores the data in an internal storage and transmits the collision signal to a remote diagnosis device, the remote diagnosis device receives the collision signal, then downloads the vehicle data from the internal storage and transmits the data to a background server, and the background server searches a database for vehicle registration information and transmits the vehicle information and the vehicle registration information to a rescue department. After a serious collision accident occurs, the system can automatically call an accident rescue dispatching center ...

Whole vehicle electrical framework without low-voltage energy and vehicle

The invention discloses a whole vehicle electrical architecture without low-voltage energy and a vehicle. The whole vehicle electrical architecture comprises a battery unit, a first central domain controller and a second central domain controller. The battery unit is respectively connected with the first central domain controller and the second central domain controller, and the first central domain controller and the second central domain controller are both connected with the electronic control unit; the battery unit comprises a battery management system and a converter control module, and the battery management system is connected with the converter control module; and the battery unit is used for controlling the converter control module to supply power to the first central domain controller and/or the second central domain controller through the battery management system. Low-voltage energy such as a lead-acid battery or a lithium battery is canceled as a starting power supply, and ...

Fault diagnosis control method of battery current sensor

The invention relates to a fault diagnosis control method of a battery current sensor. The method comprises the following steps of: acquiring the current and/or voltage of the battery current sensor by a battery management system (BMS); calculating the acquired current and/or voltage by the BMS; and when a calculating result indicates that low channel current I is -37A and/or high channel currentI is -412A, or the voltage is lower than 0.25V, judging that the current sensor has a fault.

File analysis method and device, equipment and medium

The invention discloses a file analysis method and device, equipment and a medium, and relates to the technical field of vehicle-mounted controller refreshing. The method comprises the following steps: acquiring a vehicle-mounted control file, and reading an ith control data row with a first byte length for the ith control data row to obtain a first data type corresponding to the ith control data row; determining an address field length corresponding to the first data type; reading a first data content field from the ith control data row based on the address field length, and parsing a code in the read first data content field to obtain parsed data; and sending the analysis data to the vehicle-mounted controller. According to the method, the vehicle-mounted control files of various vehicle-mounted controllers can be analyzed, and information of data content fields in the vehicle-mounted control files can be automatically analyzed, so that the vehicle controllers can refresh application ...

Vehicle door opening anti-collision early warning method and device

The invention provides a vehicle door opening anti-collision early warning method, and belongs to the technical field of vehicle active safety. After a vehicle is in a parking state and an electronic hand brake is activated, a vehicle-mounted ranging radar is started to detect an obstacle behind the side of the vehicle, so that whether a door opening collision risk exists or not is judged; when the target obstacle meeting the condition is detected, it is indicated that the door opening collision risk exists, and corresponding door opening early warning is conducted at the moment to remind passengers in the vehicle, so that the situation that the passengers collide with obstacles beside the vehicle or other road traffic participants due to sudden door opening is avoided. Therefore, the accident rate is reduced, and the vehicle use safety is improved.

Tea tree short sprout tender lateral branch cuttage

The invention discloses a tea short-spike tender lateral branch cutting propagation method, comprising: the cultivation of spikes in mother tree orchard, establishing of nursery bed, cutting and seedling nursing. The cutting propagation method is characterized in that the spike cutting adopts the short-spike tender lateral branches. The cultivation method comprises the steps as follows: (1) more fertilizer is fertilized 10-15 days before spring tea; (2) after the spring tea is picked, the cutting is carried out immediately and foliar fertilizer which can prompt the growth of the buds is sprayed so as to prompt the buds to grow as mother spikes; (3) when the mother spikes grows with the depth of 30-50cm, the topping operation is carried out so as to prompt the lateral bud of the mother spikes to bourgeon; (4) when the lateral bud of the mother spike grows to become new tender lateral branches with the heights of 10-15cm, the spike cutting can be carried out. The tea short-spike tender lateral ...

Electric vehicle rental interaction method and system

The invention provides an electric vehicle rental interaction method and system, and belongs to the field of electric vehicle control, workers can conveniently and quickly set a vehicle as a rentable vehicle or a non-rental vehicle by means of interaction among a used mobile terminal, a remote processing platform and a vehicle-mounted mobile communication module, and the working efficiency is improved. And the tenant can conveniently, quickly, safely and reliably rent and return the vehicle by virtue of interaction among the used mobile terminal, the remote processing platform and the vehicle-mounted mobile communication module.

AGV (Automatic Guided Vehicle) cooperative scheduling method considering quay crane cache region and energy consumption saving

The invention relates to an AGV (Automatic Guided Vehicle) cooperative scheduling method considering a quay crane cache region and energy consumption saving. The method comprises the following steps of (1) establishing a multi-target mixed integer programming model by taking quay crane operation delay time, quay crane and AGV bidirectional waiting time and equipment waiting delay energy consumption as targets; (2) designing a genetic-simulated annealing algorithm GA-SA by combining the global search capability of the genetic algorithm and the local search and rapid convergence capability of the simulated annealing algorithm, and inputting the result of the GA as the initial solution of the simulated SA, thereby improving the quality of the initial solution of the SA and getting rid of the condition that the GA is caught in local optimum; (3) solving the scheduling model by using a GA-SA algorithm, and comparing with the traditional GA algorithm; and (4) on the basis of selecting the combination ...

Ocean sensor network node positioning method based on efficient particle filtering

The invention relates to an ocean sensor network node positioning method based on efficient particle filtering. The method comprises the following steps: 1) acquiring a first state vector of a posterior probability mean value at a k-1 moment; 2) establishing a state model of a nonlinear system; 3) obtaining an observation model of a nonlinear system; 4) spreading particles, and calculating a state vector at the next moment according to the particle vector at the k-1 moment; 5) obtaining an observation value, and calculating a weight; (6) judging whether degradation occurs or not, if not, calculating position expectation by using the weight, and otherwise, executing the step (7); 7) modifying the small weight particles; 8) carrying out improved residual error resampling and weight normalization; and 9) calculating position expectation by using the weight in the step 8) to realize node positioning. Compared with the prior art, the method has the advantages of balancing the relation between ...

Graphite boat for improving mercury cadmium telluride rheotaxy membrane surface shape

The invention discloses a graphite boat for improving the surface shape of the extended liquid-phase film of merury cadmium telluride, which is characterized in that the mercury supply tank formerly placed at front or rear of the mother liquid tank is changed to be placed right above the mother liquid tank, a channel is provided between the two tanks for communicating; the mercury steam generated by the mercury supply tank supplements mercury into the mother liquid from the top of the mother liquid tank, so that the supplementing of the mercury steam generated by the mercury supply tank becomes more even, hence the pressure above the mother liquid is more even; in addition, as the front and the rear strcuture of the mother liquid tank are similar, the temperature field surrounding the mother liquid tank becomes more even. The advantages with the invention is that the uneveness of pressure and temperature field can be removed to the max. extent, convection of mother liquid is slowed, hence ...

Ship track prediction method and system fusing data quality control and Transform network

The invention provides a ship track prediction method and system fusing data quality control and a Transformer network, and the method comprises the steps: obtaining AIS data of all ships in a target water area, separating the track data of each ship, carrying out the data quality control primary processing of the track data, carrying out the data quality control secondary processing, and carrying out the data quality control secondary processing of the track data; adopting a cubic spline interpolation algorithm to resample and normalize the track data after the data quality control primary processing, adopting a sliding window method to construct a track sequence of a ship in a certain historical time period, and then taking the track data as a training set sample; a ship track prediction model constructed based on a full connection layer and a Transform network is trained to obtain a trained ship track prediction model, a track sequence of a certain ship in a certain historical time period ...

Simple and easy lift flat bed induction system

The utility model provides a simple and easy lift flat bed induction system, includes flat bed response magnetic stripe 1, sensor 2, sensor support 3, flat bed response magnetic stripe 1 sets up each the floor flat bed position on guide rail 6, corresponds with sensor 2, sensor 2 is installed on sensor support 3, sensor support 3 is fixed on boots 4 are led to the car, the car is led boots 4 and is installed and put the beams in place on 5 at the car. The utility model discloses simple structure, reliably durable, with low costs, mounting adjustment is convenient, adopts hall formula proximity switch sensor as response equipment, utilizes the expert of hall effect control sensor or disconnected, realizes the accurate flat bed of simple and easy lift car.

Remote monitoring system for electric car and hybrid power car

The invention discloses a remote monitoring system for an electric car and a hybrid power car. A diagnostic protocol processing module of the system obtains the state of a car high-voltage battery and the state of the whole cars through a CAN bus application protocol, meanwhile, the failure state zone bit of a car control unit is continuously detected by the cars, and collected information is stored in a storage module at regular time. The system can remotely monitor the operating and charging state of the cars, and in addition, the failures of the cars can be automatically detected and reported. Meanwhile, the charging state of the personal electric car can be mastered in real time by an individual user through an intelligent mobile phone, a specific economical time frame can be selected to carry out charging, and charging expenses are saved.

Open pipe tellurium cadmium mercury epitaxial material heat treatment method

The present invention discloses an open tube HgTe source Te-Cd-Hg epitaxial material heat treatment method. The stable mercury steam pressure required for heat treatment is provided by adopting graphite box structure. Said graphite box also can be implemented by utilizing improved liquid-phase epitaxial graphite boat, and its open tube process provides a way for batch production of the part. The success rate of using said process to make hole conduction heat treatment can be up to 100%. The hole density of the material of 77K temp. can be arbitrarily regulated in the range of 5X10 to the power 15 to 5X10 to the power 16 cm (-3). At the same time, the dislocation of material surface in the course of heat treatment does not produce increment effect, and the material composition and appearance form can be better retained.

Resin emery wheel angle abrasive disc

The utility model provides a resin emery wheel angle abrasive disc, including abrasive disc base member and dimpled grain, this abrasive disc base member is circular cymbals column structure, is provided with the installation through -hole that supplies the operative installations fixed in its centre of a circle department, and one of them side is the grinding face, this dimpled grain sets up on the grinding face, by the surface of grinding face to a plurality of recesses of the perpendicular concave yield in inside of grinding face form, each the recess with the installation through -hole of abrasive disc base member is concentric circles evenly distributed and is in on the grinding face. The utility model discloses radially be concentric circular arrangement with the dimpled grain along the installation through -hole of abrasive disc base member, the line retentivity is not influenced by the sclerosis, and product difficult appearance is warp, and density is easily controlled, does not ...

Foraminiferous incision scraper

The utility model provides a foraminiferous incision scraper for strickleing off of emery wheel shaping middlings material. Including the scraper body, a plurality of hourglasss sand material hole of transverse arrangement is offered to the downside of scraper body, and it is parallel with the base of scraper body that every lower tangent line that leaks sand material hole is linked to be a straight line, and the side of scraper body and the base of scraper body are perpendicular setting, and the scraper body is on the side upper portion of the modular ring inner wall by to the mould to the recessed formation incision in the inside of scraper body. The utility model provides a foraminiferous incision scraper has improved the shaping speed of emery wheel when improving sand material structural homogenity and surfacing nature. And, through this scraper of notched design repeatedly usable, the cost of manufacture of having saved the emery wheel.

Silicon based substrate mercury cadmium telluride rheotaxial growth method and special graphite boat

This invention discloses an epitaxial growing method for Si/HgCdTe liquid including: growing a SiO2 cover layer out of a Si/CdTe compound substrate then applying a mode of combining temperature-reduction at constant speed with cooling step by step to grow a HgCdTe epitaxial film. Advantages: the SiO2 cover layer can protect surface of the substrate and isolate contact of Si with melt liquor, and the method can avoid melt of a thin buffer layer and reduce contact time of the liquor with Si/CdTe so as to control dissolution of Si.

Method for treating wastewater generated in preparation of D-ribose, high-end VC derivative and iso-VC sodium derivative

The invention discloses a method for treating wastewater generated in preparation of D-ribose, a high-end VC derivative and an iso-VC sodium derivative. The method comprises the following steps: S1, constructing equipment; s2, hardness removal of the wastewater: S21; s22, carrying out calcium removal reaction; s23, carrying out a flocculation reaction; s24, separating mud from water; s25, temporarily storing the supernate; s26, adjusting the pH value to be neutral; s3, filtering is carried out; s4, reverse osmosis; s5, electrolysis is conducted; s6, evaporation; and S7, sludge treatment. The treatment method disclosed by the invention is good in effect, the effluent hardness is below 40mg/L, the influence on subsequent advanced treatment equipment is small, the utilization rate of carbon dioxide is high, the amount of residual organic matters can be greatly reduced after the high-organic-matter wastewater enriched in the wastewater recycling process is subjected to electrolytic treatment ...

Vehicle collision control method and device and vehicle

The invention discloses a vehicle collision control method and device and a vehicle, and belongs to the technical field of automobile control. The method comprises the steps that whether the vehicle is in an over-close mode or a pre-collision mode with a front vehicle is determined based on the current vehicle speed and a brake signal of the vehicle; outputting collision early warning information in response to the fact that the vehicle is in the mode of being too close to the front vehicle; in response to the vehicle being in the pre-collision mode, a collision protection operation is performed. According to the vehicle collision control method disclosed by the invention, the safety of vehicle driving can be improved to a certain extent.

Graphite boat with mother liquid remover for light-phase epitaxial growth of Te-Cd-Hg film

A graphite boat with mother liquid cleaner for liquid-phase epitaxial growth of Te-Cd-Hg film is composed of a bottom plate, a slide block, a base for fixing the bottom plate and the slide bock to it, quartz pad in a channel on the bottom plate and liner bottom on said quartz pad with adjustable height. Said slide block has the channel for storing mother liquid and two rectangular recesses for collecting the residual mother liquid on the film. Its resultant film has smooth surface without residual liquid.

Control method, system and equipment for booking to start air conditioner of automobile and medium

The invention discloses a control method, system and equipment for an automobile to start an air conditioner in an appointment mode and a medium, and the method comprises the steps that when the automobile state meets the condition, the function of starting the air conditioner in the appointment mode is entered through a remote terminal platform; setting a cut-off SOC and a target temperature, and selecting a reservation starting mode; the vehicle control unit calculates the duration required for reaching the target temperature according to the difference value between the current in-vehicle temperature and the target temperature and the air conditioner operation power; after the vehicle air conditioner is started and runs to reach the target temperature for the required duration, the vehicle control unit judges whether the cut-off SOC or the target temperature is reached or not; and after the cut-off SOC or the target temperature is reached, the vehicle air conditioner is turned off. A ...

Vehicle energy recovery system, method and equipment and storage medium

The invention discloses a vehicle energy recovery system, method and device and a storage medium, and belongs to the technical field of vehicles. The system firstly obtains first face information, current road condition information and current vehicle condition information of a target object, then searches for first historical road condition information matched with the current road condition information in a database based on the first face information, and then sends the first historical road condition information to the target object in multiple pieces of historical vehicle condition information corresponding to the first historical road condition information. The first historical vehicle condition information matched with the current vehicle condition information is determined according to the current vehicle condition information, then the energy recovery intensity corresponding to the first historical vehicle condition information is determined, and finally energy recovery is conducted ...

Production process of annular or tubular grooved broken steel sheet

The invention discloses a production process of an annular or tubular grooved broken steel sheet, and relates to the field of metal material processing. The injection molding machine injects the POM into a blocky sizing material through an injection mold, one surface of the sizing material is a smooth surface, and the other surface of the sizing material is a grooved concave-convex surface; the POM block-shaped material is rolled into a circle or a ring shape through a rolling die, the concave-convex face faces inwards, and the smooth face faces outwards; metal powder and organic rubber are mixed into a mixture according to a certain proportion; putting the POM which is rolled into a circle or a ring into an injection mold, and injecting the mixture into the mold to form the style of a product, so that the POM and the product are combined into a whole; the preparation method comprises the following steps: degreasing, sintering, carrying out high-temperature sintering on organic glue and ...

Ensemble Deep Learning Method for Identifying Unsafe Behaviors of Operators in Maritime Working Environment

The present invention proposes an ensemble deep learning method for identifying unsafe behaviors of operators in maritime working environment. Firstly, extract features of maritime images with the You Only Look Once (YOLO) V3 model, and then enhance a multi-scale detection capability by introducing a feature pyramid structure. Secondly, obtain instance-level features and time memory features of the operators and devices in the maritime working environment with the Joint Learning of Detection and Embedding (JDE) paradigm. Thirdly, transfer spatial-temporal interaction information into a feature memory pool, and update the time memory features with the asynchronous memory updating algorithm. Finally, identify the interaction between the operators, the devices, and unsafe behaviors with an asynchronous interaction aggregation network. The proposed invention can accurately determine the unsafe behaviors of the operators, and thus provide operation decisions for maritime management relevant activities.

Method for vessel traffic pattern recognition via data quality control and data compression

The present invention proposes a vessel traffic pattern identification method via data quality control and data compression. Firstly, assort a collection of Automatic Identification system (AIS) data points according to Mobile Service Identify (MMSI) code and sort each collection result by time ascending order, and then delete duplicated vessel AIS data points considering time stamp, latitude, longitude and vessel speed over ground, then segment vessel trajectories. Secondly obtain high-quality AIS data with an AIS data anomaly detection and repair and compress each vessel trajectory with the Douglas-Peucker algorithm. Thirdly, cluster vessel trajectories with the Quick Bundles algorithm, and identify maritime traffic pattern. The invention can efficiently identify vessel traffic patterns, and help maritime traffic management departments to accurately identify a traffic situation.

Ship image trajectory tracking and prediction method based on ship heading recognition

Disclosed is a ship image track tracking and prediction method based on ship heading recognition, which includes the following steps: obtaining a ship image data set, preprocessing the data set to obtain a preprocessed data set; inputting the preprocessed data set into the rotating ship detection network for training, obtaining the trained rotating ship detection network, collecting the ship navigation video, and inputting the ship navigation video into the trained rotating ship detection network to obtain the ship detection result; inputting the ship detection result into the rotating ship tracking network and tracking the target ship to obtain the historical trajectory and the heading information of the target ship; inputting the historical trajectory and ship heading information of the target ship into the ship trajectory and ship heading prediction network, and predicting the navigation trajectory and ship heading at sea.

Vessel type identification method using coarse-to-fine cascaded convolutional neural network

Disclosed is a vessel type identification method using a coarse-to-fine cascaded deep convolutional neural network. The method adopts a random heuristic selection mechanism to dynamically tune the structure and parameter settings of a depth network, and through coarse-step training and fine-step training, the method may obtain a deep convolutional neural network which may identify vessel types. In the method, the coarse-step training process is identical to the training process of a conventional deep convolutional neural network, and the samples inputted during the training process are vessel images. During the fine-step training process, the deep convolutional neural network is re-trained using the images of commercial ships with the lowest vessel type identification precision derived during the coarse-step training process so as to enhance the overall precision of vessel type identification. The method as disclosed may achieve a better identification precision for different vessel types and thus offers information support to automated vessel type identification and smart vessel sailing.

Communication method, device and storage medium of maritime search and rescue wireless sensor network

Method for vessel traffic pattern recognition via data quality control and data compression

The present invention provides a vessel traffic pattern identification method via data quality control and data compression, and includes the steps of assorting a collection of Automatic Identification System (AIS) data points according to Maritime Mobile Service Identity (MMSI) code; sorting each collection result by time ascending order; deleting duplicated vessel AIS data points considering time stamp, latitude, longitude and vessel speed over ground; segmenting vessel trajectories; obtaining high-quality AIS data with an AIS data anomaly detection; repairing and compressing each vessel trajectory with the Douglas-Peucker algorithm; clustering vessel trajectories with the Quick Bundles algorithm; and identifying a maritime traffic pattern. The invention can efficiently identify vessel traffic patterns and help maritime traffic management departments to accurately identify a traffic situation.

Efficient particle filter node positioning method for ocean sensor networks

The application relates to an efficient particle filter node positioning method for ocean sensor networks, including the following steps: 1) obtaining a first state vector of mean value of posterior probability at k−1 moment; 2) establishing the state model of the nonlinear system; 3) obtaining the observation model of the nonlinear system; 4) propagating particles, and calculating the state vector ū+k at the next moment according to the particle vector at k−1 moment; 5) obtaining the observed value and calculating the weight; 6) judging whether it is degraded, if not, the weight is used to calculate the position expectation, otherwise, 7) is executed; 7) modifying small-weight particles; 8) resampling the improved residual and normalizing the weights; and 9) using the weight of 8) to calculate the position expectation and realize node positioning.

Positioning method of water surface sensor network with unknown signal propagation loss under non-line-of-sight condition

Method for intelligently extracting and identifying people's tracks in different visibility environments

The application discloses a method for intelligently extracting and identifying people's tracks in different visibility environments, which comprises the following steps: Obtaining a target characteristic diagram of port operators; position coding and splicing the target feature maps, and then inputting them into an encoder to obtain the global feature information of the port operators; inputting the global feature information into a decoder for processing, and obtaining the position detection value of the port operators based on the bipartite matching; acquiring the position prediction value of the port operators by using Kalman filtering; performing cascade matching on the position detection value and the position prediction value, performing secondary matching on the position detection value and the position prediction value which fail to cascade match based on the Hungarian algorithm to obtain the final track of the port operators.

Ensemble deep learning method for identifying unsafe behaviors of operators in maritime working environment

The present invention proposes an ensemble deep learning method for identifying unsafe behaviors of operators in maritime working environment. Firstly, extract features of maritime images with the You Only Look Once (YOLO) V3 model, and then enhance a multi-scale detection capability by introducing a feature pyramid structure. Secondly, obtain instance-level features and time memory features of the operators and devices in the maritime working environment with the Joint Learning of Detection and Embedding (JDE) paradigm. Thirdly, transfer spatial-temporal interaction information into a feature memory pool, and update the time memory features with the asynchronous memory updating algorithm. Finally, identify the interaction between the operators, the devices, and unsafe behaviors with an asynchronous interaction aggregation network. The proposed invention can accurately determine the unsafe behaviors of the operators, and thus provide operation decisions for maritime management relevant activities.