44results about How to "Balance loss" patented technology

The invention discloses a device for controlling temperature and uniformity of epitaxial wafers in an MOCVD (metal organometallic chemistry vapor deposition) system. A group of non-contact optical thermometers is arranged above a tray along the radial direction to feed back the temperature of single or a plurality of epitaxial wafers in a plurality of annular areas. A temperature controller independently controls the power output of a plurality of heating elements below the tray by using difference minimization of a statistical average value of the temperatures of the epitaxial wafers and an epitaxial process specified temperature as a target. The plurality of epitaxial wafers in each annular area are correspondingly heated by using one or more lower adjacent heating elements which are arranged annularly and have small radial coverage area so as to effectively balance the radial heat loss of the epitaxial wafers and the tray under the process condition of different temperatures and realize accurate and stable control of the temperature and the uniformly between the single epitaxial wafers and the adjacent epitaxial wafers. The device is also provided with a contact thermocouple thermometer for measuring a heater temperature serving as a reference point of the epitaxial process specified temperature and meanwhile monitoring whether the heater works normally.

The invention relates to an intrusion response decision-making method based on the incomplete information dynamic game, which comprises the following steps of: establishing an intrusion response decision-making model based on the incomplete information dynamic game, introducing the game theory to an intrusion response decision-making phase, considering the effects of the intrusion response cost, the misreport rate and the report missing rate of an intrusion detection system and other factors on the intrusion response, balancing negative effects on the response and the loss caused by an attack, strengthening the capabilities for anticipating and handling the policy of an attacker, and improving the response efficiency. The invention provides an attack and defense cost-income evaluation method for calculating the costs and incomes of the attacker and the defender, further establishes an attacker-defender dynamic game model, and obtains the optimum response policy by calculating the perfect Bayesian equilibrium of the attacker-defender dynamic game model.

A first current mirror circuit including an input side transistor, an output transistor and passive elements respectively connected in series with said input side transistor and said output side transistor, temperature coefficients of said passive elements being opposite in characteristics and a second current mirror circuit provided as a load circuit of the first current mirror circuit, for feeding back an output current of the output side transistor to an input of the input side transistor are provided. A drive current is generated on a basis of a current corresponding to a current generated in the output side transistor as a reference current and an operating current ratio of the input side transistor and the output side transistor is selected such that luminance change of organic EL elements with respect to temperature change is restricted.

The invention discloses a wireless sensor network clustering routing method based on fuzzy control. The fuzzy control is used for carrying out experiential, intuitive, simple and intelligent control on cluster head selection, cluster routing selection, inter-cluster routing selection and cluster head data fusion. The fuzzy control is introduced in the clustering routing method disclosed by the invention to ensure that cluster heads can be uniformly distributed, thus the cluster heads are avoided being distributed in the same region. In addition, a distributed asynchronous cluster head selection is used in the invention, the cluster heads are replaced externally transparently, data transmission of the whole network is not interrupted due to reconfiguration of a cluster, data downlink transmission and frequent cluster head replacement are avoided; and an inter-cluster multi-hop cluster is optimized and reconfigured based on a static cluster head tag table, low energy consumption and high efficiency performance of routing are ensured, and network self-organizing ability is increased.

The embodiment of the invention provides a rate matching method, a coding and decoding device and a communication device. The rate matching method comprises the steps of obtaining an information bit sequence and a target code length M of a Polar code; when the target code length M satisfies a preset condition, coding the information bit sequence by adopting the Polar code with the code length of a first mother code as N1 and outputting a first coding bit sequence, wherein the N1 is less than or equal to M, and N1 is the integer power of 2; repeating at least a portion of bits of the first coding bit sequence to obtain a first target Polar code with the length of M; when the target code length M does not satisfy the preset condition, coding the information bit sequence by adopting the Polar code with the code length of a second mother node of N2, and outputting a second coding bit sequence, wherein N2 is greater than or equal to M, and N2 is the integer power of 2; shortening or drilling the second coding bit sequence to obtain a second target Polar code with the length of M. A repetition based rate matching scheme is adopted under the condition of very low coding gain loss, so that the coding and decoding complexity is reduced.

The invention discloses a power distribution network economy reconstructing method considering network loss and reliability. The power distribution network economy reconstructing method considering the network loss and reliability includes an economy optimizing model for summing based on power loss cost due to network loss and power loss cost due to deficiency of power supply amount under a power failure state, an object-oriented power distribution network reliability calculating method matched with the model, a power distribution network economy reconstructing model calculation method based on a biogeography algorithm, and power distribution network economy reconstructing steps based on the core content of the three parts, wherein the power distribution network reliability calculating method includes element collection class, block class, block class tree and power supply route determination methods, and the power distribution network economy reconstructing model calculation method includes the construction of residential suitability indexes, habitat characteristic vectors, transport models and the like. The power distribution network economy reconstructing method considering the network loss and reliability combines the yearly demand not supplied due to the network electricity interruption and the yearly power loss due to the network loss to construct the power distribution network economy reconstructing model which simultaneously considers the power distribution network reliability and network loss, and the model has visual economy characteristics and strives to obtain the most economical network structure. The power distribution network economy reconstructing method considering the network loss and reliability is suitable for reconstructing the power distribution network economy.

The invention discloses a charging system power distribution method. The method comprises: receiving a power distribution request sent by a charging pile; acquiring state information of each power module in the idle queue; calculating a health value of each power module according to the state information by utilizing a load balancing algorithm; and selecting the optimal power module from the idlequeue according to the health value, and allocating the optimal power module to the operation queue of the charging pile. According to the invention, the optimal power module is selected from the idlequeue according to the health value and is allocated to the operation queue of the charging pile, thereby achieving the purpose of balancing the loss of each power module, effectively reducing the fault rate of the power modules, improving the stability of a charging system, and reducing the probability of huge loss. The invention also provides a charging system power distribution system and device, and a computer readable storage medium, which have the above beneficial effects.

The invention discloses a method for manufacturing a [mu]90 composite magnetic powder core. The [mu]90 composite magnetic powder core is made by compounding two or more alloy powders. The alloy powders comprise the following components: mechanically crushed sendust, aerosolized sendust, aerosolized iron-silicon, aerosolized iron-nickel and aerosolized iron-nickel-molybdenum. The manufacturing method comprises the steps of powder compounding, passivation, insulation coating, press molding, heat treatment and surface coating. The alloy powders complement each other in terms of performance so that the performance of the prepared composite powder core is close to that of a commercially available amorphous magnetic powder core. The alloy powders used in the method have the advantages of mature technology, stable performance and relatively low cost so that the prepared magnetic powder core has quite high cost performance and stable characteristics. The composite magnetic powder core with magnetic permeability of [mu]90 has excellent physical properties and magnetic properties. By use of the magnetic powder core prepared by the invention, the development requirements of an existing electronic industry for low-voltage high current, high power density and high frequency are greatly satisfied.

The invention belongs to the technical field of agricultural machinery, in particular to a closed coaxial differential arch dental roller for a semi-feeding combined harvester and a semi-feeding rice thresher. Aiming at the defects of large volume and complicated structure of the traditional threshing roller, the invention provides the closed coaxial differential arch dental roller with small volume, simple structure and favorable threshing effect. The closed coaxial differential arch dental roller comprises a closed low-speed roller, a closed high-speed roller, a hollow shaft and a roller shaft, wherein the hollow shaft is sleeved on the roller shaft; the low-speed roller is fixed on the hollow shaft; the high-speed roller is fixed on the roller shaft; a plurality of arc teeth which are spirally arranged are arranged on the cylindrical surface of a roller body of the high-speed roller; a thrust bearing and an adjusting sleeve are arranged between the high-speed roller and the lower-speed roller on the roller shaft; a transitional ring with arch teeth is arranged between the high-speed roller and the lower-speed roller; the head of the low-speed roller is in a circular truncated cone shape; a guide plate is arranged at the head of the low-speed roller; two rows of triangle belt wheels II are arranged on the hollow shaft; and triangular belt wheels I are arranged on the roller shaft.

The invention discloses a method for manufacturing a [mu]26 composite magnetic powder core. The technical scheme is as follows: after two or more alloy powders from mechanically crushed sendust, aerosolized sendust, aerosolized iron-silicon, aerosolized iron-nickel and aerosolized iron-nickel-molybdenum are selected and are fully mixed, phosphoric acid passivation treatment and drying are performed, then one or more from silicon oxide, aluminum oxide, calcium oxide and magnesia calcinata, sodium silicate, and deionized water are successively added to the alloy powders subjected to the passivation processing and drying for insulation coating, and afterwards, the [mu]26 composite magnetic powder core is prepared after press molding, heat treatment and surface coating. The alloy powders used in the method have the advantages of mature technology, stable performance and relatively low cost so that the prepared magnetic powder core has quite high cost performance and stability. Such oxides as the silicon oxide, the aluminum oxide, the magnesia calcinata and the like and such inorganic materials as the sodium silicate and the like are used for coating adhesion so that the obtained composite magnetic powder core has the advantages of high stability, high reliability, low cost, high safety and facilitated production.

The present invention relates to a flash storage file management system and its method. It can manage writing and updating operation of the flash storage file, and can belance the loss of flush storage memory unit. Said invention also provides the concrete steps for implementing said management method. The utilization of said invented system and method can prolonge service life of flash memory.

The invention discloses a switch loss dispersion and distribution modulating method for an ANPC (active neutral-point-clamped) type three-level inverter. Two transient states O+out and O-out are added to switch states in a conventional PWM (pulse width modulation) method for an ANPC type three-level inverter, the transient state O+out is added in the conversion process when the state P is switch to the state O+, the transient state O-out is added in the conversion process when the state N is switched to the state O-, switch loss produced by active switch devices is dispersed, and turn-off loss and turn-on loss are borne by an outer switch and an inner switch respectively, so that switch loss of the active switch devices on the inner and outer sides is balanced.

The invention relates to a topology construction and internet access method for an aviation ad-hoc network. In the method, a flight process is divided into five stages including a dormancy stage, a waiting stage, a take-off stage, a cruising stage and a landing stage; a corresponding topology construction and data transmission strategy is provided for a flight node in a specific flight stage, wherein a waiting node is used as a connection point between an ad-hoc network in the air and a ground network, passively accepts network access requests of other nodes, and is mainly responsible for data relay; on one hand, a take-off node rapidly establishes a link information table; on the other hand, the take-off node accepts a request of the waiting node, carries data of the ground network, and rapidly diffuses data of the ground network in the ad-hoc network in the air; a cruising node regularly updates the link information table, and selects the optimal and backup link to perform data exchange in the air according to a link distance and the link duration; and a landing node rapidly forwards the data of the network in the air to the waiting node, and finally forwards the data into the ground network. By means of the topology construction and internet access method for the aviation ad-hoc network disclosed by the invention, fully connected topology can be rapidly formed; and communication between the aviation ad-hoc network and the ground network is realized.

The invention discloses an anti-network tracking privacy protection method and system based on identity behavior confusion. The method comprises the following steps: 1) a plurality of virtual identities is constructed for a user; 2) a behavior splitting module sequentially allocates a corresponding virtual identity to each web service operation request sent in the real behavior chain of the user;3) an identity switching module switches the user identity to the currently allocated virtual identity and executes the allocated web service operation request; a behavior generation module generatesa virtual behavior for the current virtual identity; the virtual behavior refers to simulating a behavior which is not executed by a real user and sending a virtual request to the web service to enable a behavior chain of a virtual identity to be complete; and 4) the return results are respectively fed back to a result fusion module for fusion for the plurality of virtual identities allocated to the user, and then the fusion results are returned to the client where the user is located. According to the method and the system, the plurality of identities are used for access, so that the privacyinformation of the user is effectively protected.

The invention provides a method and a device for controlling dissipation balance of a full-bridge module, the method comprises the steps that when Uc and -Uc levels are output by a sub-module, the time delta t when positive and negative levels are output is divided into two stages delta t 1 and delta t 2, the delta t is equal to the sum of the delta t 1 and the delta t 2, two kinds of states are divided in each time period, two kinds of states are divided in the time period delta t 1, a switching tube T1 and a switching tube T2 are conducted alternatively in the delta t 1, and a switching tubeT3 and a switching tube T4 are conducted alternatively in the delta t 2. In the period when the positive level Uc is output and in the period when the switching tube T1 and the switching tube T2 areconducted alternatively, the normal conductive state of the tube T4 is kept, and in the period when the switching tube 3 and the switching tube 4 are conducted alternatively, the normal conductive state of the tube T1 is kept; in the period when the negative level Uc is output and in the period when the switching tube T1 and the switching tube T2 are conducted alternatively, the normal conductivestate of the tube T3 is kept, and in the period when the switching tube T3 and the switching tube T4 are conducted alternatively, the normal conductive state of the tube T2 is kept. According to the method and the device for controlling the dissipation balance of the full-bridge module, rising of the junction temperature of each device of the module due to unbalanced power dissipation of each power device of the full-bridge module is avoided, and the power output capacity of the whole module is improved.

The invention discloses an all-fiber mode-locked laser device based on a micro-nano fiber polarizer. The laser device is characterized in that an output end of a pump source is connected with an inputend of a wavelength division multiplexer, an output end of the wavelength division multiplexer is connected with one end of an erbium-doped fiber, the other end of the erbium-doped fiber is connectedwith an input end of an optocoupler, 10% of output ends of the optocoupler are connected with a spectrometer, 90% of the output ends of the optocoupler are connected with an input end of a polarization non-correlated isolator, one side of a first polarization controller is connected with an output end of the polarization non-correlated isolator, the other side is connected with an input end of the micro-nano fiber polarizer, an output end of the micro-nano fiber polarizer is connected with one side of a second polarization controller, and the other side of the polarization controller is connected with the input end of the wavelength division multiplexer. The laser device is advantaged in that the micro-nano fiber polarizer has a linear polarization extinction ratio (LPER) of about 15 dB,and the all-fiber mode-locked laser device based on the polarizer produces a stable pulse sequence with the pulse duration of 0.92 ps.

The invention provides an image processing method, device and equipment and a computer readable storage medium. The method comprises the steps of obtaining a to-be-processed image, and performing feature extraction on the to-be-processed image to obtain image features of the to-be-processed image; determining a control vector and a compression degree coefficient based on the image features; determining a target exit stage of the trained image enhancement sub-model based on the compression degree coefficient and a model structure of the trained image enhancement sub-model; based on the image feature and the control vector, obtaining an image processing result of the trained image enhancement sub-model when the target exit stage is reached; and outputting the image processing result. Through the invention, the exit stage of image processing can be determined in a self-adaptive mode, and the image processing efficiency is improved.

The invention discloses a rapid-start method and device of a Flash file system. The method comprises a journal recording step, a snapshot storing step and a starting step, wherein the journal recording step is to perform journal recording using block as unit in the Flash file system; the snapshot storing step is to store snapshot data in an independent block so as to separate snapshot data from the data of the file system; and the starting step is to directly read snapshot and build the related information of the file system in system internal storage when effective snapshot exists in the file system and to read journal in each block and build the related information of the file system in system internal storage when effective snapshot does not exist in the file system.

The invention provides an electric car, a power supply touch net, a charging facility and an urban operation method of the electric car and relates to an electric car driven by storage batteries. A battery vehicle capable of supplying power sources to the electric car and self driving on the road surface is arranged on the electric car. A power supply touch net power-taking system, a tracking system and an automatic driving system are arranged on the electric car. A power transmission and transformation system, a trajectory touching system and an information and control system are arranged on the power supply touch net. The trajectory touching system is a sectional type independent control system. The charging facility constituted by a battery charging room forms a bicycle parking area. The power supply touch net is arranged on a loop road of a city and with the perimeter being not more than 180 kilometers; on the loop road, the electric car is subjected to identity enrollment by touching a trajectory and then is subjected to power taking for driving; after the electric car breaks away from the power supply touch net, settlement is automatically conducted; through batteries, the electric car drives on the loop road, and after arriving at a destination, the electric car drives to a charging station or a home for charging through the batteries.

The invention discloses a face detection and alignment method and device, and the method comprises the steps: obtaining a face data set which comprises a plurality of face images with image label information; taking the face data set as input of a preset face detection and alignment network model to perform model training so as to output face label information predicted by the network; calculatinga first loss function corresponding to the face frame position information, a second loss function corresponding to the face frame classification information and a third loss function corresponding to the face key point coordinate information according to the image label information and the face label information; outputting a first weight factor corresponding to the first loss function, a secondweight factor corresponding to the second loss function and a third weight factor corresponding to the third loss function through a full connection layer of the network model; determining a total loss function according to each loss function and the corresponding weight factor; and according to the total loss function, performing back propagation to update each weight so as to determine a targetface detection and alignment network model.

The invention discloses a method for manufacturing a [mu]75 composite magnetic powder core. The method comprises the steps of powder compounding, passivation, insulation coating, press molding, heat treatment, surface coating and product finishing. Employed alloy powders are made by compounding two or more powders from mechanically crushed sendust, aerosolized sendust, aerosolized iron-silicon, aerosolized iron-nickel and aerosolized iron-nickel-molybdenum. The alloy powders complement each other in terms of performance so that the performance of the prepared composite powder core is close to that of a commercially available amorphous magnetic powder core. The prepared [mu]75 composite magnetic powder core has excellent physical properties and magnetic properties. In case of 100kHz, 1V, the effective magnetic permeability [mu]e of the magnetic powder core is 75; under 1000e, the coefficient of initial magnetic permeability is equal to or greater than 0.45; and the power loss PCV (50kHz, 1000Gs) of the magnetic powder core is equal to or smaller than 400mW / cm<3>. By use of the magnetic powder core prepared by the invention, the development requirements of an existing electronic industry for low-voltage high current, high power density and high frequency are greatly satisfied. Therefore, the prepared magnetic powder core can be applied to some occasions with quite high requirements for good stability and low cost as a replacement of a part of amorphous powder cores.

The invention provides a lithium niobate-doped modified Mg-based hydrogen storage material and a preparation method thereof, and relates to the technical field of magnesium-based solid hydrogen storage materials. The preparation method comprises the following steps: carrying out ball milling on MgH2 and lithium niobate in an inert gas or hydrogen atmosphere to obtain an efficient magnesium-based hydrogen storage material; in the hydrogen storage material, the mass fraction of the catalyst is 2-20 wt.%. Compared with a material not doped with a lithium niobate catalyst, the magnesium-based hydrogen storage material obtained after ball milling of lithium niobate and MgH2 has the advantages that the catalyst has excellent catalytic activity, the hydrogen absorption and desorption performance of the magnesium-based hydrogen storage material can be further improved, the hydrogen absorption and desorption temperature is remarkably reduced, and the hydrogen absorption and desorption speed is increased. The magnesium-based hydrogen storage material provided by the invention is simple in preparation process and excellent in hydrogen storage performance, and has an important reference value for industrial development of hydrogen energy storage and transportation.

The invention relates to a heterogeneous memory allocation method and device and electronic equipment, the heterogeneous memory comprises a plurality of nonvolatile memories, and the method comprises the following steps: receiving a memory allocation request initiated by an application program, reading memory resource information of a system, wherein the memory resource information comprises the memory size, the initial address, the current written frequency, the maximum writable frequency, the read delay, the write delay and the economic cost of the plurality of non-volatile memories; calculating the allocation cost of each nonvolatile memory in the plurality of nonvolatile memories based on the memory allocation request, the memory resource information and a preset calculation rule; and allocating the memories to the application program according to the allocation cost of the plurality of blocks of nonvolatile memories in an ascending order. According to the scheme, a more reasonable memory allocation optimization mechanism is provided and is used for balancing the write-in life loss and the read-write delay of the nonvolatile memory, so that the cost of each time of memory allocation is lowest.

The invention discloses a loss balance control method for a full-bridge modular multilevel converter, and the method comprises the following steps: collecting the current of a bridge arm, the capacitor voltage of a sub-module, and the switching state of each power device in the sub-module, calculating the average loss of each power device, judging the switching state of the sub-module, and carrying out the calculation of the average loss of each power device. By comparing the average loss of the left and right bridge arms of the full-bridge sub-module, the working time of the sub-module in the two operation modes is adjusted, and finally loss balance is realized. Compared with a conventional method, the loss balancing method is good in loss balancing effect, easy to control and high in economical efficiency, and the construction cost of the modular multilevel converter does not need to be increased.

The invention provides a composite heat pump air conditioning system based on an environment-friendly low-temperature refrigerant. The composite heat pump air conditioning system comprises a buried pipe heat exchange loop, a refrigerant loop, an air conditioning output terminal, a domestic hot water loop and a heat replenishing unit. The refrigerant loop and the buried pipe heat exchange loop are connected, and the air conditioning output terminal and the refrigerant loop communicate. By means of the arrangement of the domestic hot water loop, low-price domestic hot water can be provided, the underground heat discharge amount can be reduced, and conservation of soil heat near an underground pipeline is kept; and due to the fact that the environment-friendly low-temperature refrigerant is added, energy saving and environmental protection are promoted. Due to the fact that the heat replenishing unit is arranged, richer heat supply modes can be provided, use is more convenient, and the overall air conditioning system is more stable.

The invention relates to a seawater multi-effect membrane distillation desalination salinity valve opening flow control device, the structure of which comprises: microporous membrane, seawater desalination device, sea current mixing rod, seawater evaporator, salinity flow control device, microporous membrane Embedded and installed on the upper surface of the seawater desalinator, the sea current mixing rod is installed inside the seawater desalinator, and the seawater evaporator is embedded and installed at the bottom of the seawater desalinator. When the inflow of the seawater desalinator increases, the seawater inside the seawater The salinity becomes thinner under the dilution of excess seawater, and the content of hydrated metal ions in seawater decreases per cubic meter, which reduces the conductivity of the sea salt conductor inside the salinity flow control device, reduces the suction of the water flow control block, and makes the water flow The lowering of the control block reduces the water outlet of the water inlet area, so that the inflow of the seawater desalinator becomes smaller, so as to balance the heat loss of the water vapor passing through the microporous membrane, increase the water production ratio that is reduced due to the increase of the inflow, and increase the seawater desalination The water production rate of the device.

The invention relates to a topology construction and internet access method for an aviation ad-hoc network. In the method, a flight process is divided into five stages including a dormancy stage, a waiting stage, a take-off stage, a cruising stage and a landing stage; a corresponding topology construction and data transmission strategy is provided for a flight node in a specific flight stage, wherein a waiting node is used as a connection point between an ad-hoc network in the air and a ground network, passively accepts network access requests of other nodes, and is mainly responsible for data relay; on one hand, a take-off node rapidly establishes a link information table; on the other hand, the take-off node accepts a request of the waiting node, carries data of the ground network, and rapidly diffuses data of the ground network in the ad-hoc network in the air; a cruising node regularly updates the link information table, and selects the optimal and backup link to perform data exchange in the air according to a link distance and the link duration; and a landing node rapidly forwards the data of the network in the air to the waiting node, and finally forwards the data into the ground network. By means of the topology construction and internet access method for the aviation ad-hoc network disclosed by the invention, fully connected topology can be rapidly formed; and communication between the aviation ad-hoc network and the ground network is realized.

The invention relates to a method for manufacturing an electrochemical energy storage system (2) that includes at least one electrode (21, 22), especially an anode, wherein the at least one electrodeincludes at least one prelithiated electrode active material (41, 42) and at least one current collector (31, 32). Lithiation is performed by reacting the electrode active material (41, 42) with an organolithium compound of formula Li-R, wherein R is selected from the group consisting of: a linear or branched, saturated or unsaturated, preferably saturated, aliphatic or heteroaliphatic hydrocarbongroup having 5 to 12 carbon atoms, which can include at least one heteroatom selected from Si, S, N, and O; a cycloaliphatic or heterocycloaliphatic hydrocarbon group having 5 to 12 carbon atoms, which can include at least one heteroatom selected from Si, S, N, and O; and an aromatic or heteroaromatic hydrocarbon group having 5 to 9 carbon atoms, which can include at least one heteroatom selectedfrom Si, S, N, and O.