121results about How to "Improve overall efficiency" patented technology

The invention discloses a lithium ion battery thermal performance testing method. The method comprises the steps of: placing a fully-charged battery in a constant-temperature box, and detecting an open-circuit voltage and the surface temperature of the battery in real time; carrying out discharging operation by a preset current until the battery is discharged to a preset charge state; detecting the open-circuit voltage and the surface temperature of the battery at different discharge time points until the battery charge state is equal to zero to obtain an actual open-circuit voltage and an actual open-circuit voltage temperature coefficient B of the battery; discharging the fully-charged battery, and detecting a work voltage U and the surface temperature T of the battery in real time at different discharge time points; and calculating the heating power P of the battery at different discharge time points. The lithium ion battery thermal performance testing method disclosed by the invention can conveniently and reliably test the thermal performance of the lithium ion battery during discharge, and can accurately acquire the heating power, the change of heating power over time and the total heating amount of the lithium ion battery during discharge.

The invention discloses an automatic rectangular tube feeding device which comprises a rack, a feeding box, horizontal sorting platforms, at least two sets of material poking devices arranged on the rack, at least two sets of overturning mechanisms arranged on the rack and a horizontal conveying roller set arranged on the rack and used for longitudinally conveying rectangular tubes. Each material poking device set comprises a material poking lifting frame arranged on the rack in a vertically lifting mode. The material poking lifting frames are driven by a material poking lifting power device and arranged on horizontal material poking frames in a horizontally sliding mode. The horizontal material poking frames are driven by a horizontal material poking power device and provided with material poking rods. The overturning mechanisms comprise jacking rods, and the jacking rods are driven by an overturning lifting power device. The horizontal conveying roller set is arranged on the rack. By means of the automatic feeding device, automatic feeding of the rectangular tunes can be achieved, and the rectangular tubes are turned over and conveyed out according to the actual requirements, so that the rectangular tubes can be cut by a downstream process conveniently, rectangular tube cutting is more automated, and overall efficiency is higher.

The invention discloses an intelligent logistics full-course sensing system which comprises a cargo information system for recording cargo distribution information, a transportation terminal monitoring system for monitoring relevant information of a transportation terminal in the distribution process, a distribution information monitoring system for recording relevant information of cargo distribution results, and a logistics monitoring center, wherein the logistics monitoring center is used for receiving information transmitted by the cargo information system, the transportation terminal monitoring system and the distribution information monitoring system and displaying the information processing results. The intelligent logistics full-course sensing system, provided by the invention, controls the Internet of Things application system of cargo information within cargo transportation life cycle in real time through the Ethernet, the wireless sensor network, the Big Dipper / GPS satellite and other communication technologies, provides the basis for operation dispatching and security assurance, meets various demands for vehicle management, improves operating benefit, effectively reduces costs of people, vehicles and cargos, and increases the overall benefits of the transportation logistics industry.

The present invention relates to coal additive and method for raising coke output and performance. The coal additive contains surface activating catalyst, co-solvent, permeation assistant and solvent. When the coal additive is used, the surface activating catalyst is dissolved in the solvent, added into coal through a specific mode, and distributed on the surface of coal and inside coal under the action of the permeation assistant. During producing coke, the coal additive is heated and the volatile component is separated out, to raise the output and performance of the produced coke. The high performance coke may be used in coal burning, dry distilling, gasifying, liquefying and other fields. The present invention can reach the aims of raising the utilization rate of coal, saving coal resource, reducing pollutant, etc.

The invention provides a photovoltaic array combiner box which comprises multiple DC (direct current) input branches, wherein the multiple DC input branches are connected in parallel and then combined into one DC output; and each branch has a maximum power tracking function so as to work at respective maximum power point. The combiner box also comprises multiple voltage compensation units connected in series with the branches respectively, and a comparison calculation unit, wherein the comparison calculation unit is used for comparing to obtain the maximum value of voltage at the maximum power point of each branch, calculating the difference between the maximum value and the voltage value at each maximum power point respectively, and outputting the difference to the voltage compensation unit corresponding to each branch respectively; and the voltage compensation unit is used for performing voltage compensation for the corresponding branch according to the difference so that the output voltage of the branch is equal to the maximum value. The photovoltaic array combiner box provided by the invention can ensure that each branch still can output voltage at respective maximum power after the output is combined, thus the total output power of the combiner box reaches the maximum.

The invention discloses a resource optimal management method aiming at a clustering system. The method includes: integrating nodes into different queues; distributing tasks into different queues; determining a task completing sequence by calculating priority of the tasks; when there are nodes which are occupied while in an idle state, enabling the idle nodes to pick other tasks to complete according to different strategies. By the method, by flexibly calling and arranging of the idle nodes inside the system, the objectives of increasing utilization rate of the nodes in the clustering system and improving overall efficiency of the clustering efficiency are achieved.

The invention belongs to the field of high-performance geographic calculation, and discloses a shapefile master-slave type parallel writing method based on the OGR (open geospatial rule), which includes: step 1, inputting command line parameters; step 2, setting up a shapefile target data source and a layer file serially, and closing a target data source file; step 3, opening a shapefile original file to be processed to acquire each layer and graphic data volumes of the shapefile; step 4, performing MPI (message passing interface) parallel initialization to acquire numbers and quantity of processes, and setting a master process and slave processes; step 5, performing data partitioning to determine initial fid and terminal fid of graphics in the shafpefile processed by each process; and step 6, allowing each slave process to perform shapefile data processing. Computing resources are fully used, and integral efficiency of shapefile processing is improved.

The invention relates to a method for removing sulfur dioxide and nitric oxide by combining dual-shaft clash smoke gas, comprising the following steps of: dedusting and cooling polluted smoke gas to enter a dual-shaft clash stream premixing pipe, performing gas-liquid premixing with urea / ammonia water mixing solution in the dual-shaft clash stream premixing pipe, controlling the temperature of absorption liquid at 30 to 80 DEG C, accelerating the absorption liquid by smoke gas in the dual-shaft premixing pipe and entering a clash stream reactor body. A device is composed of a heat exchanger, a dual-shaft clash premixing pipe, a clash stream reactor body, an efficient demister, an absorption liquid circulation pump, a liquid collecting tank, a valve, a centrifuge, a separation liquid pump, an ammonia water pump, an ammonia water liquid distributing tank, a urea solution pump, a urea solution distributing tank and an air compressor. The dual-shaft clash stream premixing pipe comprises two pairs of clash stream premixing pipes each of which comprises two premixing pipes arranged in the same direction; the premixing pipe is provided with an absorption liquid atomizing nozzle; and the two pairs of clash stream premixing pipes form orthogonality relation in the same horizontal plane.

The invention discloses a memory mapping processing method of mobile terminal location data and a big data platform. The method includes the following steps that: when a mobile terminal performs a communication behavior, and the number information of the mobile terminal and the identifier of a base station cell where the mobile terminal is currently located are obtained; the position change condition of the mobile terminal is judged, and data which are related to the mobile terminal and stored in a memory are updated according to the position change condition, wherein the memory is used for storing the historical position data of a plurality of mobile terminals and the information of mobile terminals which are served by a plurality of base stations in a preset time; and when the times exceeds the preset time, the historical position data of the plurality of mobile terminals and the information of the mobile terminals served by the plurality of base stations which are stored in the memory are transmitted to a historical data processing hard disk. With the memory mapping processing method of the mobile terminal location data adopted, the overall efficiency of position processing of the mobile terminals can be improved, and list indexing can be realized when historical data are queried, and therefore, query speed is higher, and the overall efficiency of the big data platform for fast processing massive terminal position data change can be improved.

A solid laser contains LD array, heat sink adhered crystal chip, coupling output mirror, wherein the crystal chip has gain medium doped column shape thin crystal in center and regular n-polygon non-doped irregular structure crystal in outside, which has a column hole in center, n is not less than 6 and is even number, the surface of column shape thin crystal plated with oscillation all reflection film and adhered with micro-pass cooling heat sink, n number of LD arrays fixed on outside of non-doped irregular structure crystal. Said invention has high laser power output, simplified pumping optical structure, fine mechanical stability and radiation ability.

The invention discloses an unmanned aerial vehicle cluster distributed online cooperative region reconnaissance method and device, and the method comprises the steps of dividing a task region into grids with the same size, and enabling each unmanned aerial vehicle to maintain a grid map in a mode of local storage matrix data; carrying out online evaluation on the state transition of the adjacent region, and calculating the optimal or better motion direction of the next step in a performance constraint range; and when reconnaissance of adjacent areas of the unmanned aerial vehicle is completed,enabling the unmanned aerial vehicle to calculate the optimal area transfer direction through hierarchical area division and task allocation mechanisms. Therefore, on-line collaborative real-time planning is realized based on the probability map, the global experience advantages of a traditional off-line planning mode are fused by reasonably designing a comprehensive evaluation function, and theoverall efficiency of collaborative reconnaissance of the unmanned aerial vehicle cluster is improved through a boundary search and regional weight coordinated distribution mechanism.

The invention relates to an electric lifting table with a spring balanced design. The electric lifting table comprises a base, an upper tabletop, scissor mechanisms, a lead screw transmission mechanism and an assorted electronic control system, and the lead screw transmission mechanism is arranged between the two scissor mechanisms and comprises a motor, a gearbox, a middle box, a push box, a lead screw, a stroke guide rod and a brake hydraulic cylinder. The electric lifting table is characterized in that a compressed balance spring is arranged on the stroke guide rod. A lead screw transmission mechanism of an existing electric lifting table is reasonably modified, counterweight balance is realized by the compressed balance spring arranged on the stroke guide rod, the balance spring assists the motor to lift up a heavy object when the lifting table ascends, and gravitational potential energy is converted into elastic potential energy to be stored by the balance spring when the lifting table descends, so that purposes of reducing power of the motor and improving integral efficiency are realized.

The invention relates to an energy-saving system of a double-speed same electrical system and synchronous diesel generator assembly, which comprises a diesel generator assembly, at least one breaker, a central control system, a function choosing module, a diesel generator assembly control module and a power switching module. A signal of the function choosing module enters the central control system which controls the on and off of the breaker by outputting a signal according to the input signal; the speed of the diesel generator assembly is controlled by the output signal of the central control system via the diesel generator assembly control module; the power which meets the requirements of the national grid is obtained from the output power of the diesel generator assembly through the power switching module. The system overcomes the problem of low efficiency of a variable-speed generator and has high overall efficiency and obvious energy-saving effects; the invention does not change the structure and working pattern of the existing generator, protects the existing investment and ensures that the project can be easily promoted.

The invention discloses a debris-flow drainage canal with energy dissipation and drainage functions and an application of the debris-flow drainage canal with energy dissipation and drainage functions. The drainage canal comprises a fully-lining drainage canal bottom plate and drainage canal side walls on two sides of the drainage canal bottom plate; the drainage canal bottom plate is in the shape of continuously-connected multiple-stage steps, the steps are provided with grooves; the width of the grooves on the top surfaces of the steps increases gradually along the flow direction of the debris flow, and the width of the grooves on the vertical surfaces of the steps decreases gradually; and the maximum width of the grooves on the top surfaces of the steps coincide with the maximum width B on the vertical surfaces of the steps. Compared wit the prior art, the step shape design is adopted to dissipate the energy of the debris flow all the way and the groove design is adopted to drain the debris flow, so the debris-flow drainage canal disclosed by the invention has high efficiency and good drainage capacity. By adjusting the height and the length of the steps and the size and the shape of grooves, the debris-flow drainagedrainage canal can be used for preventing the debris flow with any gradient and any nature.

The invention discloses a loading method after multi-partition application of a comprehensive modularized avionics system. A section of dynamic loading area is set in the memory space; the dynamic loading area is divided into several areas, and each area corresponds to one; the interrupt response to an external event , sequentially load the corresponding application image files from the external storage medium to the configured dynamic loading area, and reset the working mode of the corresponding partition to cold start mode, so that the partition can host and run the application loaded later. Due to the adoption of the partition application post-loading technology, the corresponding partition applications can be selectively loaded according to actual needs during the operation of the IMA system, which saves IMA system resources. In addition, there is no need to wait for the real partition application to be built before performing IMA system synthesis. , improving the overall efficiency of the IMA system.

The invention discloses a hybrid electric vehicle composite power supply for self-adapting filter power dividing control and a self-adapting filter power dividing control method. The composite power supply comprises a storage battery, a super capacitor and a bidirectional DC / DC (Direct Current / Direct Current) convertor, wherein the storage battery is connected with a power bus to be used as a main power supply; the super capacitor is connected with the power bus by the bidirectional DC / DC converter and is connected with the bidirectional DC / DC converter in series to form an auxiliary power supply. The self-adapting filter power dividing control method is used for controlling the bidirectional DC / DC converter. The super capacitor in the composite power supply is used for carrying out power compensation on the storage battery so as to prevent from providing instantaneous power and peak power by the battery; the whole efficiency of the composite power supply is obviously improved; the super capacitor can be used for rapidly and efficiently charging and discharging by large current and regenerative braking energy is recycled to the greatest extent; the self-adapting filter power dividing control method realizes the reasonable distribution of power, guarantees that all parts of the composite power supply are efficient obtains the good control effect.

The invention provides a mixed bridge-type isolated bidirectional DC converter and a control method therefor. The converter comprises a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm, a high-frequency isolation transformer T, a capacitor C1, and a capacitor C2. The first bridge arm consists of two switching tubes S1 and S2, and the second bridge arm consists of two switching tubes S3 and S4. The third bridge arm consists of two switching tubes S5 and S6, and the fourth bridge arm consists of two switching tubes S7 and S8. The switching tubes S2, S4, S7 and S8 are SiC-MOSFET switching tubes. According to the invention, the converter enables the novel SiC-MOSFETs with smaller switching loss to be combined with a current mainstream semiconductor technology, enables the switching loss to be centralized on the SiC-MOSFETs through control, enables an isolated bidirectional DC converter to have the advantages of two types of switching devices, and improves the system efficiency and switching frequency.

The invention discloses a land utilization scheme optimization system. The system comprises a target data collection module, a data preprocessing module, an incidence relation establishment module, aphysical model construction module, a virtual actuator, a virtual parameter module, a simulation analysis module, a land utilization scheme assessment sub-module, a scheme optimization decision module, a land utilization scheme information management system and a central processing unit. According to the system, through self-definition of the virtual actuator, the virtual parameter module and thesimulation analysis module, automatic analysis and acquisition of planning scheme data are realized, and land utilization space configuration rationality can be effectively improved.

The invention discloses a method, a device and a computing device for managing virtual machine resources, wherein, the method comprises the following steps: determining each task to be tested in a specific test system; calculating a virtual machine quantity threshold value corresponding to a specific test system of the task according to the number of test cases to be executed of the task for any task; comparing a number of virtual machines of a corresponding specific test system in an automation platform that has completed the snapshot processing for the task with a threshold value of the number of virtual machines; according to the comparison result, the virtual machine resources of the automated cloud platform being deployed. The scheme of the invention allocates virtual machine resources for tasks according to the number of test cases to be executed of the tasks, and allocates the virtual machine resources in the platform according to the number of virtual machines occupied by the tasks in real time, so that the virtual machine resources in the platform can be reasonably allocated to each task, thereby improving the overall test efficiency of the platform.

The invention discloses a multi-transformer switch power supply with a cascaded output. The multi-transformer switch power supply comprises a plurality of groups of transformers, a rectifier, a high frequency transformer, a driving module, a power supply controller and a cascade controller, wherein the plurality of groups of transformers are used for converting direct current into alternating current; the rectifier is used for converting the alternating current into the direct current; the high frequency transformer is used for raising voltage or reducing voltage; the driving module is used for selecting and driving switch devices of the transformers; the power supply controller is used for outputting a control signal of a single power supply monomer; and the cascade controller is used for cascading a plurality of switch power supplies. The switch power supply can be applied to the electrochemical field.

The invention discloses a system and a method for evaluating litchi organoleptic quality. The method for evaluating the litchi organoleptic quality comprises the steps of acquiring comment data of litchi by a judger; then analyzing the overall litchi preference degree by adopting a preference ranking method, treating quantitative description of a set index under each dimensionality of litchi by adopting a series descriptive analysis method, and analyzing set dimensionality of the litchi by adopting a quantitative descriptive analysis method; determining a litchi organoleptic quality evaluatingtable according to data treated through analysis treatment, the series descriptive analysis method and the quantitative descriptive analysis method. According to the system and the method for evaluating the litchi organoleptic quality provided by the invention, multiple dimensionalities such as appearance, texture, taste, flavor and smell are evaluated, the litchi product is analyzed sequentiallyfrom preference degree to descriptive analysis, and the scientificity of commentary data statistics is ensured.

The invention provides a vehicle fuel cell operation power control system and method. The system comprises a fuel cell management unit, a vehicle control unit, a power cell management unit, and a motor controller, wherein the power cell management unit, the motor controller, and the fuel cell management unit are respectively connected with the vehicle control unit. The vehicle controller controlsthe fuel cell to follow the power of the vehicle motor to a certain extent according to the motor bus voltage and the motor bus current; and the SOC is monitored and the operation power of the fuel cell is dynamically adjusted, so that the power cell is prevented from being overcharged and overdischarged, the SOC is maintained in an optimal service life working interval, and the service life of the power cell is prolonged.

The invention relates to a light emitting diode driving method, suitable for driving a plurality of light emitting diode strings. Each light emitting diode string comprises a light emitting diode or a plurality of light emitting diodes connected in series. The light emitting diode driving method comprises the following steps of: acquiring the initial duty ratio of the driving current of each light emitting diode string in a frequency cycle so as to acquire the target accumulated glow brightness of each light emitting diode string; when the maximum value of the initial duty ratios of the driving currents of the light emitting diode strings in the frequency cycle is smaller than the frequency cycle, extending the duty cycle of the driving current of each light emitting diode string in the frequency cycle and enabling the accumulated brightness of the light emitting diode string in the extended duty cycle to be equal to the target accumulated glow brightness.

The invention relates to a novel three-phase current converter topology based on a modular multilevel converter, wherein the three-phase current converter belongs to the technical field of a power electronic converter. The three-phase current converter topology comprises a high-voltage electrode, an isolating electrode and a low-voltage electrode, wherein the high-voltage electrode has a three-phase structure. A four-bridge-arm three-phase modular multilevel converter structure is utilized, namely two phases in the three phases are composed of four bridge arms, and the output end of the three phase is obtained through serially connecting capacitors. The third phase output end of the high-voltage electrode is arranged at the middle point of the serially connected capacitors. The summation of voltages of all capacitors in the third phase is equal with a bus voltage. The isolating electrode is formed through serially connecting and then parallelly connecting a plurality of isolator modules in a high-frequency isolation manner. The number of sub-modules of the isolating electrode is determined according to the voltage of the isolating electrode and overvoltage resistance grade of an adopted switch device. The primary voltage grade of the sub-module of the isolating electrode can be different from the voltage grade of a semi-bridge sub-module of the high-voltage electrode. The novel three-phase current converter topology has advantages of small number of required sub-modules, low output voltage harmonic wave, high system efficiency, etc.

The invention discloses a preparation method for a tin-doped indium phosphide quantum dot sensitized solar cell. The preparation method comprises the following steps: (1) mixing Sn<2+>, In <3+> and long-chain alkyl acid to obtain a mixture, and adding the mixture into an octadecene solvent to mix to obtain a mixed solution; (2) preparing the mixed solution into an carboxylic acid indium precursor solution containing dopant ions; (3) adding tri (trimethyl silicyl) phosphine to prepare a tin-doped indium phosphide quantum dot solution; (4) separating and purifying the indium phosphide quantum dot solution; (5) transferring the indium phosphide quantum dot solution into a water phase from an oil phase; (6) preparing a quantum dot sensitized FTO / TiO2 electrode plate; (7) assembling the quantum dot sensitized FTO / TiO2 electrode plate with a cuprous sulfide electrode plate, and injecting polysulfide electrolyte to obtain the tin-doped indium phosphide quantum dot sensitized solar cell. The preparation method is reasonable in design and convenient to operate, and the short-circuit current and the photoelectric conversion efficiency of the cell are remarkably improved, and therefore, the preparation method is suitable for being popularized and applied.

The invention relates to a method for improving numerical reservoir simulation efficiency by optimizing the behaviors of a Cache. According to the conventional method, the hit rate of the Cache is low, so that overall performance is average. A quad-tree-based sparse matrix-vector multiplication method is introduced, and comprises the following optimization steps of: reading a sparse matrix, and converting the sparse matrix into a quad-tree storage format; determining the optimal size of each sub-matrix block by adopting a pre-tuning algorithm; and integrating a vectorization technology, a software pipelining technology and a multi-thread optimization technology in operation to improve the performance of a conjugate gradient solver. Therefore, the overall operation efficiency of numerical reservoir simulation calculation is improved.

The invention discloses a power generation system with supercritical water thermal combustion of coal and supercritical carbon dioxide cycle coupled. The power generation system comprises a supercritical water thermal combustion reaction device of coal, a supercritical carbon dioxide cycle power generation device and an auxiliary heating device. In the power generation system, heat sources are provided by the supercritical water thermal combustion reaction device of the coal and the auxiliary heating device. Supercritical carbon dioxide in the supercritical carbon dioxide cycle power generation device is adopted as a cycle working medium. According to the power generation system with supercritical water thermal combustion of coal and supercritical carbon dioxide cycle coupled, the supercritical carbon dioxide is adopted as the working medium; supercritical water thermal combustion of the coal serves as the main heat source; heat produced by methane combustion serves as an auxiliary heat source; by means of gradient utilization of energy, efficient transformation of coal power is promoted; and efficient power generation of fire coal is comprehensively achieved, and meanwhile, zero release of pollutants such as sulfur oxides, nitrogen oxides, dusts and the like and greenhouse gases such as carbon dioxide is achieved.

The invention relates to an uninterrupted power supply system for a power source of an intelligentized computer. After a power-down signal observation circuit observes whether the power supply signal is suddenly cut off or not, if yes, a power supply battery circuit is started; a 12V storage battery is directly used by switching so as to output 12V direct voltage for the computer, meanwhile, the 12V direct voltage is still converted into the direct voltage which is needed by other groups of computer by a DC / DC converting circuit. Therefore, when the commercial power is cut off, the 12V storage battery can supply power without using an inversion circuit but in a way that only the 12V storage battery is directly switched to the low voltage DC output terminal of the power source of the computer; the output 12V direct voltage is used for supplying power for the computer in one hand, and the 12V direct voltage can be converted into other voltages such as +5V, +3.3 V, +5VSB, and the like, by DC / DC conversion for the computer. As the efficient DC / DC converting circuit technology is adopted, the converting efficiency can be over 90%, therefore, the consumption in the inversion process is reduced, meanwhile, the overall working efficiency of the power source of the computer is improved, the circuit structure applying the method of the invention is simplified, and the cost is lower.

The invention discloses an amplitude-type holographic printing method capable of adjusting a longitudinal position of a reconstructed three-dimensional scene. The method comprises the steps of (S1) designing a three-dimensional scene by using 3D-aid software or generating point cloud data of objective things by using a laser scanner; (S2) sampling the three-dimensional scene or the point cloud data and generating amplitude-type holograms by using a point source method; (S3) loading the amplitude-type holograms by using a spatial light modulator, evaluating the definition and the spatial resolution of the reconstructed three-dimensional scene and selecting the hologram with the best reconstruction effect for printing; (S4) making the reconstructed three-dimensional scene reach the longitudinal position through changing a distance parameter in the point source method; and (S5) after printing is completed, reconstructing the three-dimensional scene by using reference light and evaluatingthe reconstruction effect. The amplitude-type holographic printing method belongs to an amplitude-type holographic printing technology, a practical application of calculating holographic three-dimensional display is improved, development and improvement of the holographic printing technology are facilitated and the amplitude-type holographic printing method has the advantages that the space-bandwidth product is increased and the longitudinal depth of the reconstructed three-dimensional scene is adjusted.

The embodiments of the invention disclose an LED constant current drive circuit and an LED light fixture. The LED constant current drive circuit comprises an LED, a switch circuit, a current sampling circuit, an auxiliary power supply circuit and an PWM control chip, wherein the auxiliary power supply circuit comprises an auxiliary power supply inductor, an auxiliary power supply diode and an auxiliary power supply capacitor; the LED, the switch circuit, the current sampling circuit and the auxiliary power supply inductor are successively series connected and then are connected between the anode of a power supply and the cathode of the power supply; the starting end of the PWM control chip is communicated with the anode of the power supply; the power supply end of the PWM control chip is communicated with the cathode of the power supply through the reverse auxiliary power supply diode, and is communicated with the cathode of the power supply successively through the auxiliary power supply capacitor and the auxiliary power supply inductor; the pulse output end of the PWM control chip is communicated with the control end of the switch circuit; and the feedback control end of the PWM control chip is connected with the current sampling circuit. By using the LED constant current drive circuit and the LED light fixture, energy consumption can be reduced and efficiency can be improved.