40results about How to "Achieve cold start" patented technology

The invention discloses a court electronic file-oriented case information automatic extraction method, which comprises the steps of creating a case information extraction framework, performing statistical analysis on case elements in various case electronic file files, and constructing a basic case body; customizing a basic case information extraction strategy according to the case ontology and the layout characteristics of the electronic file; constructing a case information extraction framework based on a cross-domain information extraction tool TZIE of XML; building an NER model and a training and multi-granularity semantic unit combination mode based on multi-granularity semantic legal documents, employing a Word2vec Skip-gram model and an LDA topic model, obtaining a judicial domain word vector model and a judicial domain word vector model through training respectively, combining domain entity recognition of a BiLSTM-Attention CRF model, adding an Attentio mechanism in a referencemodel BiLSTM-CRF, predicting the probability that each semantic unit belongs to different labels, assisting an optimized model training mode, taking a manual annotation corpus training model as a main task, and taking manual and automatic annotation corpus training models as auxiliary tasks.

The invention relates to the technical field of hybrid electric vehicles, and discloses a hybrid electric vehicle thermal management system and a hybrid electric vehicle. The hybrid electric vehicle heat management system comprises a pump body, an engine and a fuel cell stack which are in pipeline connection, wherein the engine is in parallel connection the fuel cell stack and then is connected inseries with a water outlet of the pump body through a first three-way valve; and cooling liquid can flow into an engine and/or the fuel cell stack from the water outlet of the pump body after flowingthrough the first three-way valve and then flow back to the pump body. The hybrid electric vehicle thermal management system is capable of heating the fuel cell stack by utilizing the waste heat of the engine, thus realizing cold start and rapid temperature rise of the fuel cell stack; and in addition, the engine is supported to be rapidly warmed up by utilizing the waste heat of the fuel cell stack, thereby simplifying the system structure and reducing the cost.

According to a fuel cell cold starting device and a method thereof, a first gas path system, a second gas path system and a heating assembly are all controlled by a central control system. During cold start, the first gas path system generates heat through compressed air to heat a cathode of a fuel cell stack, the second gas path system conveys hydrogen to enable the fuel cell stack to perform hydrogen-oxygen reaction heat release, and meanwhile, the heating assembly receives a power signal to perform heating. Through the above three heating processes, the fuel cell system, especially a fuel cell stack, is rapidly heated, so that the temperature value and the internal resistance value of the fuel cell system reach numerical values required by cold start, cold start in a short time is rapidly realized, the time required by cold start is shortened, and the efficiency is high; besides, during shutdown, air and hydrogen are adopted to blow the system at the same time to dry residual moisture, and whether the humidity in the system meets the requirement or not is judged by monitoring the rising condition of the internal resistance value, so that blowing is controlled to be stopped, and conditions are created for next cold start.

The invention provides an engine and a cold starting system and a cold starting method thereof, which do not need any auxiliary starting equipment, and the cold starting system has a simple structure, is easy to implement, and can rapidly and stably implement cold starting. The cold starting system comprises an air cylinder with an intake valve and an exhaust valve, the exhaust valve communicates with an exhaust pipe, the exhaust pipe communicates with a return pipe through a switch, and the return pipe communicates with the intake valve; during starting, the exhaust pipe communicates with the return pipe through the switch, so that exhausted unburnt gas flows back into the air cylinder via the return pipe. The method includes the following steps: gas entering the air cylinder is compressed; the compressed exhausted unburnt gas is led into the air cylinder again, and is compressed again in the next operating cycle; when internal temperature is not lower than the burning point of diesel oil, the oil is injected into the air cylinder to start the engine. Since the unburnt gas which is compressed once flows back into the air cylinder and compressed again, the internal temperature reaches the burning point of the diesel oil, and thereby the rapid cold starting of the engine is realized.

The invention provides a starting method used for a methanol engine and the methanol engine, and relates to the field of methanol engines. According to the starting method, before the methanol engineis started, the temperature of the engine is detected, and if the temperature before the methanol engine is started is lower than preset temperature, after a control unit receives a starting command,gasoline cold starting gasoline sprayers are controlled to spray gasoline into manifolds on an intake manifold so as to achieve cold starting of the methanol engine. In the method, the gasoline cold starting gasoline sprayers directly spray gasoline into the manifolds of the intake manifold to be mixed with air, the process that gasoline is directly sprayed into an intake pressure stabilization cavity of the intake manifold to be mixed with air and then distributed to the manifolds is avoided, and therefore the spray amount of gasoline can be effectively controlled, the problem of engine coldstarting failing caused by insufficient gasoline supply during cold starting of the methanol engine is avoided, and the problem that during cold starting of the methanol engine, too much gasoline is sprayed, and consequently discharging exceeds standards is avoided.

The invention discloses an external particle heat absorber and a solar power generation system. A particle heat exchanger internally provided with a particle channel and a working medium channel is arranged, meanwhile, a heat absorption pipe group is arranged to be communicated with two ends of the working medium channel to form a circulating pipeline, the working medium channel is in heat transfer contact with the particle channel, and after a phase change working medium in the heat absorption pipe group absorbs heat and is evaporated into a gaseous phase change working medium, the gaseous phase change working medium enters the working medium channel to exchange heat with the cold particles in the particle channel and is condensed into a liquid phase change working medium which flows back to the heat absorption pipe group. The heated hot particles can be output to next external equipment from the output end of the particle channel. The liquid phase change working medium is arranged as the middle heat exchange medium, heat is transmitted to the particles after evaporation, and the particles are heated to the needed temperature, so that high efficiency is achieved, and the problem that an existing particle heat absorber is low in heat absorption efficiency is solved. Meanwhile, the particle technology is low in price and higher in heat absorption temperature, and the kilowatt-hour cost of a photo-thermal power station can be greatly reduced under the condition of the same heat absorption efficiency.

The invention relates to the technical field of hydraulic pressure, in particular to a hydraulic starting system and method used at the low temperature and an engineering machine. The system comprises a power mechanism, a metering pump, an electromagnetic valve, an execution system and a hydraulic oil tank; the power mechanism provides driving power for the metering pump, an oil supply path of the metering pump is communicated with an oil inlet of the electromagnetic valve and an oil inlet of the execution system, and an oil outlet of the electromagnetic valve and an oil outlet of the execution system are communicated with the hydraulic oil tank; when the electromagnetic valve is powered on and opened, the power mechanism provides driving power for the metering pump so as to enable the metering pump to suck hydraulic oil from the interior of the oil tank, one part of hydraulic oil flowing out of the metering pump enters the execution system, the other part of the hydraulic oil flowing out of the metering pump enters the electromagnetic valve, the pressure difference of the electromagnetic valve is far less than the maximum pressure relief value of the metering pump, and when the power mechanism is started, the resistance moment of the execution system to the power mechanism is reduced, and cold starting of the power mechanism is achieved.

The invention discloses a vehicle fuel cell air system with a cold start function. The system comprises an air supply unit, a fuel cell stack and a fuel cell controller; the air supply unit is connected with the fuel cell stack; the fuel cell controller is connected with the air supply unit and the fuel cell stack; the air supply unit comprises a solid adsorption type heat storage device; the solid adsorption type heat storage device adsorbs moisture in air and releases adsorption heat used for heating the fuel cell stack to achieve cold start. The invention further discloses a control method of the vehicle fuel cell air system with the cold start function. The solid adsorption type energy storage principle is ingeniously utilized; a large amount of the adsorption heat is released in an adsorbate adsorption process through an adsorbent to preheat the fuel cell stack, so that the cold starting of the fuel cell is achieved, and the defect that the endurance mileage of a fuel cell vehicle in the prior art is shortened is overcome.

The invention relates to a pulverized coal combustor capable of being ignited with little gasified oil, which comprises a little gasified oil gun, a little gasified oil combustion chamber, a pulverized coal conveying pipeline, a primary combustion chamber, a secondary combustion chamber and a third-level combustion chamber, wherein the pulverized coal conveying pipeline is connected to a pulverized coal inlet of the primary combustion chamber, the little gasified oil combustion chamber is connected to the front side of the primary combustion chamber, the little gasified oil gun is connected to an air inlet of the little gasified oil combustion chamber, the secondary combustion chamber is connected to the rear side of the primary combustion chamber, a third-level stable combustion chamber is connected to the rear side of the second combustion chamber, and the three-level stable combustion chamber consists of an alpha-angle tapered drum and a straight drum from front to back, wherein the inner diameter of the angle-angle tapered drum is enlarged from front to back. The invention provides the pulverized coal combustion which is capable being ignited with little gasified oil and has the advantages of higher combustion efficiency and oil saving rate.

The invention discloses a cold starting system of a wind generating set, which is used for heating loaded components of the wind generating set from the inside out. The cold starting system of the wind generating set comprises a hydraulic power unit, a filter, a direction control valve and a controller, wherein the hydraulic power unit is used for providing power for the flow of lubrication oil; heaters which are used for heating the lubrication oil are arranged between the hydraulic power unit and the loaded components of the wind generating set in sequence; the filter is used for filtering the impurities in the lubrication oil; the direction control valve is used for controlling the heated lubrication oil to flow to the loaded components of the wind generating set through cold starting pipes; the controller is used for controlling the cold starting of the wind generating set; and the hydraulic power unit, the heaters and the direction control valve are respectively connected with the controller. The invention aims at providing the cold starting system of the wind generating set, which is capable of heating the loaded components of the wind generating set from the inside to the outside under low temperature conditions, avoiding the bad phenomena such as brittle rupture, unlubricated friction and the like caused by direction operation, and realizing the safe and stable starting of the wind generating set.

The invention discloses a fuel cell low-temperature starting heating and waste heat recovery system based on strontium chloride ammoniate heat storage, and belongs to the technical field of fuel cells. According to the invention, the principle that ammonia gas and strontium chloride are obtained through a process that strontium chloride ammoniate is subjected to a chemical desorption process afterbeing heated is utilized, and the waste heat generated during the operation of the fuel cell is stored in the chemical energy of ammonia gas and strontium chloride. When a fuel cell is started at a low temperature, heat is released in the process of obtaining strontium chloride ammoniate through chemical adsorption between ammonia gas and strontium chloride, the heat is transferred to a fuel cellstack, and the fuel cell is helped to be rapidly heated and started under the low-temperature condition under the condition that extra power is not consumed. According to the system, the waste heat of the fuel cell is used for helping the temperature rise in the low-temperature starting process, a thermochemical energy storage mode is adopted, the energy storage loss is small, the energy efficiency is high, the starting speed of the fuel cell is increased under the condition of not consuming extra electric quantity, and irreversible structural damage caused by low-temperature starting to thefuel cell is eliminated.

The invention discloses a method and a device for assisting a machine learning model to be online. The method comprises the steps of: obtaining a model file obtained by offline training a machine learning model; analyzing the model file, and determining a training data table used in a model training process; creating an online data table consistent with the table information of the training data table in an online database; and importing at least part of offline data into the online data table. Therefore, when the offline trained machine learning model is deployed on line, online data cold start can be realized by utilizing the method and the system, and support is provided for model online.

The invention discloses a cold cathode structure for a magnetron, comprising a bottom metal rod, an upper shielding cap and a lower shielding cap sheathed on one end of the bottom metal rod, and a cold cathode arranged between the upper shielding cap and the lower shielding cap The emitter, the cold cathode emitter includes alternately arranged primary emitters and secondary emitters, and the primary emitters are located at both ends of the cold cathode emitter. The invention also discloses a millimeter-wave magnetron with a cold cathode structure, wherein the thickness of the cold cathode emitter is 0.62-6.5mm. The invention realizes the reliable interaction between the primary electron and the secondary multiplication phenomenon by alternately setting the primary emitter and the secondary emitter, and ensures the reliable startup of the magnetron; the magnetron manufactured by the cold cathode structure of the present invention No need for filament heating, instant start-up, no obvious start-up lag time, and electrical parameter characteristics after start-up are consistent with those of hot cathode magnetrons.

The invention relates to a thunder detection method and system based on image recognition, and the method comprises the steps: collecting a sound signal which contains or does not contain fan sweepingpneumatic noise in a period of time through audio equipment, and achieving the recognition of thunder in the sound signal through the further analysis of the sound signal. The thunder detection system based on image recognition comprises a sound sensor used for collecting sounds of a draught fan, the environment and the like, a machine-end hardware device and application software running on a station-end server, and the machine-end hardware device comprises an edge hardware data collection system. According to the application, through the deep learning model of image classification, the timedomain and frequency domain feature expressions of thunder on the spectrogram can be obtained without artificially exploring and selecting sound features or carrying out noise reduction or preprocessing on the sound, and the generalization of outdoor scenes in different environments is higher.

The invention relates to a data recommendation method and device, a server and a storage medium, and belongs to the technical field of computers. The method comprises the steps of obtaining target data features corresponding to to-be-recommended target multimedia data, calling a feature conversion model, performing feature transformation processing on the target data features to obtain transformed predicted operation features, determining the matching degree of each user and the target multimedia data according to user features corresponding to multiple users and the predicted operation features, and recommending the target multimedia data according to the matching degree of each user and the target multimedia data. And selecting at least one target user from the plurality of users according to the matching degrees corresponding to the plurality of users, and recommending the target multimedia data to the at least one target user. According to the method, the predicted operation characteristics of the multimedia data are used for representing the operation possibly executed by the user on the multimedia data, the user matched with the multimedia data is determined, and the multimedia data are subsequently recommended to the matched user, so that accurate recommendation of the multimedia data is realized, the accuracy of data recommendation is ensured, and cold start of the multimedia data is realized.

The invention provides a text error correction method and device, electronic equipment and a readable storage medium, and relates to the technical field of artificial intelligence such as natural language processing and deep learning. The text error correction method comprises the steps of obtaining a to-be-processed text, and determining a target text in the to-be-processed text; obtaining at least one candidate phoneme sequence according to a phoneme dictionary and an original phoneme sequence of the target text; according to the at least one candidate phoneme sequence and phoneme sequences of a plurality of candidate words, selecting a target word from the plurality of candidate words; and obtaining an error correction result of the to-be-processed text according to the target word. According to the method, the steps of text error correction can be simplified, the cost of text error correction can be reduced, cold start of text error correction can be realized, a better error correction effect can be obtained under the condition of'pronunciation-like character error 'in the text, and the accuracy of text error correction is further improved.

The invention discloses a fuel cell and a cold start control method thereof. The fuel cell comprises an electric pile; a gas inlet pipeline for inputting gas into the electric pile; an exhaust pipeline for exhausting heat and residual gas in the electric pile; a backflow pipeline; and a controller which can control the opening degree of the three-way valve according to the temperature of the electric pile, wherein one end of the backflow pipeline is communicated with the exhaust pipeline through a three-way valve, and the other end of the backflow pipeline is communicated with the gas inlet pipeline so as to guide heat and residual gas into the gas inlet pipeline . In the cold starting process of the fuel cell, heat generated by the electric pile can be fully recycled, so that the fuel cell can increase the starting temperature by virtue of the heat generated by the fuel cell so as to realize cold starting, the cold starting performance of the fuel cell is greatly improved, and the cold starting time is shortened. Meanwhile, the backflow pipeline can realize cyclic utilization of oxygen while realizing cyclic utilization of heat, so that the fuel utilization rate is improved, the clean energy concept is met, the efficiency of a fuel cell engine is also improved, and the hydrogen consumption is reduced.

The invention relates to the technical field of engine fuel filters, in particular to a constant-temperature electromagnetic purifying assembly which comprises an electromagnet, a constant-temperature heater and a magnetism isolation and heat isolation body. The magnetism isolation and heat isolation body is located between the electromagnet and the constant-temperature heater. The invention further provides a constant-temperature electromagnetic purifying filter which comprises a filter shell, a filter element, a filter element inner support, an upper buckling plate, a lower buckling plate and the above constant-temperature electromagnetic purifying assembly. The constant-temperature electromagnetic purifying assembly is installed in the filter shell, and the heating face of the constant-temperature heater is in contact with the lower buckling plate. Compared with the prior art, the constant-temperature electromagnetic purifying assembly and the constant-temperature electromagnetic purifying filter have the beneficial effects that energy conservation and environment friendliness are achieved, the filtering effect is good, and the heating effect is good.

The invention relates to a fuel cell cold start system based on liquid magnetic heat flow and a control method, a fuel cell thermal management unit is communicated with a fuel cell stack, and a cooling loop and a magnetic working medium loop are arranged in the fuel cell thermal management unit, a heat management controller is electrically connected with a first circulating pump, a first radiator, a three-way electromagnetic valve, a first temperature sensor and a second temperature sensor in the cooling loop, and is electrically connected with a second circulating pump, a second radiator and a third temperature sensor in the magnetic working medium loop; the cold start of the fuel cell is realized by circularly transferring heat in the environment to the fuel cell stack by constructing magnetization heat release-demagnetization heat absorption-magnetization heat release in a low-temperature environment by utilizing a magnetothermal effect of a magnetic material, so that the energy consumption is low, the utilization rate and the endurance mileage of the fuel cell are favorably improved, and the loss of irreversible electrochemical active area caused by interface separation of platinum and ion resin due to ice melting is avoided.