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291results about How to "Improve equalization performance" patented technology

Blind channel balancing method based on improved PSO (Particle Swarm Optimization) BP (Back Propagation) neural network

The invention designs a blind channel balancing method based on an improved PSO (Particle Swarm Optimization) BP (Back Propagation) neural network. In the process of solving the blind balancing problem on the basis of a BP neural network, determination of an initial weight and a threshold of the BP neural network is lack of the theoretical basis and has the defects of low convergence speed, easiness for falling into a local minimal value and the like so as to cause a poor channel blind balancing effect. In order to overcome the defects of the BP neural network and improving the channel blind balancing effect, the invention discloses a blink balancing method based on the improved PSO-BP neural network. According to the method, firstly, defects of a basic particle swarm algorithm are overcome, parameters of the basic particle swarm are improved, and an inertia weight and a learning factor are adaptively regulated; secondly, the initial weight and the threshold of the neural network are optimized by utilizing the advantage of high global searching capacity of the improved particle swarm, and then more accurate searching is carried out in such local space by utilizing a BP algorithm soas to obtain an optimal connection weight and threshold of the neural network; and finally, blind balancing based on the the improved PSO-BP neural network is implemented.
Owner:CHONGQING UNIV

Technology for regenerating active carbon by supersonic desorptive activation

The invention is concerned with active carbon rebirth technology to desorption and activation with large power industry ultrasonic technology after active carbon is saturation for disposing the sewage with organic matters and heavy metal ion with filtration. The ultrasonic generator sends out high frequency surging signal and the transducer changes the high frequency sound wave to spread in medium and produce exquisite machine surge. Ultrasonic travels in cleaning medium to drive the liquid to produce lots of tiny air bubbles, those air bubbles shake intensively with the action of sound field. When the press of sound reaches to a certain value, the bubbles rise quickly and close suddenly and the close produces shock wave and thousands of atmospheric pressure to force the water-fast feculence to escape from the carbon hole to disperse in the solution. It will clean the tiny space and surface of active carbon to realize the rebirth process. It has low rebirth cost without another pollution and the renewed active carbon has better adsorption efficiency, likely 95 to 130 percent of new carbon, and the wastage is less than 0.3 percent each time. This active carbon has long work time for circulation using with low cost and wide application range.
Owner:周恩民

Balance control management system and balance control method of lithium-ion power battery pack

The invention discloses a balance control management system and a balance control method of a lithium-ion power battery pack. The balance control management system of the lithium-ion power battery pack comprises a MCU central control unit, a battery information monitoring module, a battery heat radiation module, a balance control module and a battery module, wherein the MCU central control unit is respectively connected with the battery information monitoring module, the battery heat radiation module and the balance control module, and the battery information monitoring module, the battery heat radiation module and the balance control module are respectively connected with the battery module. According to the balance control method, in the charging process, the battery information monitoring module continuously carries out data collection and conversion on the information of a single battery, feeds the obtained data to the MCU central control unit through an infrared transmitter, and when the voltage of one battery deviates from an interval value, and the MCU central control unit charges and discharges the battery by controlling a K-series switch and an optocoupler relay. According to the balance control management system and the balance control method of the lithium-ion power battery pack, the circuit is simple, the battery balance method is effective and easy to achieve, and the same balance effect is achieved both in the processes of charging and discharging.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Method and base station equipment for dispatching downlink communication resources

The invention discloses a method and base station equipment for dispatching downlink communication resources. The base station equipment comprises a DRX period configuring module, a notice module and a resource allocation module. The method which is executed by the base station equipment comprises the following concrete steps: using the DRX period configuring module to configure DRX periods of DRX users and configure starting points of the DRX periods of the DRX users on downlink subframes in balance; using the notice module to notice the DRX period and the starting point of the DRX period of each DRX user to a corresponding DRX user to carry out DRX monitoring; and using the resource allocation module to dispatch corresponding downlink communication resources in balance according to the allocated starting point of the DRX period of each DRX user. The method and the base station equipment for dispatching downlink communication resources can be used for improving the balance of the downlink dispatching of the base station and the balance of the utilization ratio of resources in the DRX working mode, and can be used for reducing the defect that part of users are dispatched in delay, but part of downlink resources are not utilized fully.
Owner:DATANG MOBILE COMM EQUIP CO LTD

Triangle connection cascade energy storage system two stage equalization control method

The invention provides a triangle connection cascade energy storage system two stage equalization control method. The method comprises the steps that 1, SOC and SOH information of each link of a chained energy storage system is acquired; 2, rechargeable power and dischargeable power of each link are respectively calculated; 3, total rechargeable power and dischargeable power of each line and the whole system are calculated; 4, power distribution and control are carried out on each line; and 5, on the basis that the power of each line is determined, the voltage of each link is distributed according to the proportion of the rechargeable/dischargeable power of each link, and power distribution according to the proportion can be realized. According to the invention, the maximization of the capacity utilization rate of the energy storage system is used as a goal, namely simultaneous complete charging and discharging are carried out on batteries of all links; a safe operation boundary is considered, so that the requirement of the energy storage system for an equalization ability in different operation conditions and SOC states can be reasonably reflected; and an equalization performance is optimized in a range which can be realized.
Owner:SHANGHAI JIAO TONG UNIV +1

Agricultural greenhouse with marsh gas heating auxiliary system

The invention provides an agricultural greenhouse with a marsh gas heating auxiliary system. The technical problem that in a cold environment, an existing agricultural greenhouse is low in indoor temperature, poor in heat preservation property and the like is solved. The agricultural greenhouse with the marsh gas heating auxiliary system comprises a greenhouse frame and a transparent greenhouse film; the marsh gas heating auxiliary system comprises a marsh gas fermentation pond, a transparent flow guide pipe is laid on the top face of the greenhouse film, a terrestrial heat pipe is laid on the ground in the greenhouse, and the terrestrial heat pipe is connected with a marsh gas heating device. Marsh gas generated by the marsh gas fermentation pond is connected with the marsh gas heating device through a gas conveying pipe, the liquid inlet end of the flow guide pipe is connected with a water storage tank, and the water storage tank is further connected with an output opening of a first circulating pump. An input opening of the first circulating pump is connected with the liquid outlet end of the flow guide pipe through a connecting pipe, and heat collecting sheets are arranged in the water storage tank. The agricultural greenhouse has the advantages of saving energy, being good in greenhouse heat preservation effect and the like.
Owner:李梦颖

Linear equalizer

The invention discloses a linear equalizer which comprises a differential input pair pipe, a second resistor, a third MOS capacitor and a fourth MOS capacitor, wherein the differential input pair pipe is composed of a first MOS transistor and a second MOS transistor, the drain electrode of the first MOS transistor and the drain electrode of the second MOS transistor are respectively and sequentially connected with a first resistor and a first inductor in series, and the first resistors and the first inductors are required to produce a zero point higher than channel bandwidth. The two ends of the second resistor are connected with the source electrode of the first MOS transistor and the source electrode of the second MOS transistor respectively. The third MOS capacitor and the fourth MOS capacitor are composed of the MOS transistors connected through the source electrodes and the drain electrodes in a short circuit mode, a grid electrode of the third MOS capacitor and a grid electrode of the fourth MOS capacitor are connected with the source electrode of the first MOS transistor and the source electrode of the second MOS transistor respectively, and the second resistor, the third MOS capacitor and the fourth MOS capacitor are required to produce another zero point higher than the channel bandwidth. The linear equalizer can be used in high-speed serial transmission, the two zero points can be formed, low frequency small transmission gain and high frequency large transmission gain can be achieved, high frequency transmission gain can be greatly improved, and the balancing performance is improved.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP

Energy storage system, balance control method of energy storage system and photovoltaic power generation system

The invention provides an energy storage system, a balance control method of the energy storage system and a photovoltaic power generation system, and relates to the technical field of energy storage systems. The energy storage system comprises a controller and three power conversion branches. Each power conversion branch comprises a power conversion circuit, or each power conversion branch comprises at least two power conversion circuits which are connected in series. The second end of each power conversion circuit is connected with at least one battery cluster; each battery cluster comprises at least two energy storage modules which are connected in series, and each energy storage module comprises a direct current/direct current conversion circuit and a battery pack; the output end of each battery pack is connected with the input end of the corresponding DC/DC conversion circuit, and the output ends of the DC/DC conversion circuits are connected in parallel with the equalization bus. And the controller controls each DC/DC conversion circuit, so that the electric quantity of each battery pack in the battery cluster is balanced. By means of the scheme, the electric quantity balance capacity of the energy storage system is improved, and the influence of the battery short-plate effect is relieved.
Owner:HUAWEI DIGITAL POWER TECH CO LTD

LED epitaxial structure with high light extraction efficiency and growing method thereof

The invention provides an LED epitaxial structure which comprises a substrate, a low-temperature buffer layer, a non-doped GaN layer, an Si-doped n-type GaN layer, an InxGa(1-x)N / GaN light emitting layer, an InX / Mg3N2 super-lattice inner roughed layer, a p-type AlGaN layer and a magnesium-doped p-type GaN layer, wherein the substrate, the low-temperature buffer layer, the non-doped GaN layer, the Si-doped n-type GaN layer, the InxGa(1-x)N / GaN light emitting layer, the InX / Mg3N2 super-lattice inner roughed layer, the p-type AlGaN layer and the magnesium-doped p-type GaN layer are successively laminated. The InX / Mg3N2 super-lattice inner roughed layer comprises 8-10 monomers which are arranged in an overlapped manner. Each monomer comprises an InN layer and a Mg3N2 layer. The LED epitaxial structure provided by the invention is advantageous in that the InX / Mg3N2 super-lattice inner roughed layer covers the light emitting layer; the InX / Mg3N2 material has an advantage of low mismatch with the GaN crystal lattice; high quality of the epitaxial layer crystal is realized; not only is light efficiency improved, but also antistatic capability can be improved; and LED product quality is improved. As an integral technical solution, the InX / Mg3N2 super-lattice inner roughed layer has advantages of increasing number of photons extracted from the LED in light unit time, reducing number of attenuation times of the photons in the LED, and correspondingly improving light extraction strength. The invention further discloses a growing method of the LED epitaxial structure. The growing method of the LED epitaxial structure has advantages of concise steps, easy process parameter control and convenient industrial production.
Owner:XIANGNENG HUALEI OPTOELECTRONICS

Quick product spraying device based on advanced manufacturing production line

The invention relates to the technical field of advanced manufacturing, in particular to a quick product spraying device based on an advanced manufacturing production line. The quick product sprayingdevice comprises a base, a feeding mechanism, a spraying mechanism, a spraying chamber, a drying chamber and an air drying chamber, wherein the feeding mechanism comprises a feeding plate, the two sides of the upper end of the feeding plate are correspondingly provided with side plates, and the portions, located at the inner sides of the side plates, of the upper end of the feeding plate are provided with clamping plates. According to the quick product spraying device, upper-and-down opposite spraying design is adopted, materials in an upper spraying plate and a lower spraying plate are uniformly conveyed, and the balance in spraying is improved. Moreover, through the cooperation of an infrared emitter and an infrared receiver, the upper spraying plate and the lower spraying plate can be automatically controlled to conduct spraying, an upper drying plate and a lower drying plate in the drying chamber simultaneously conduct targeted drying on the upper and lower faces of panels, and besides, opposite-jetting air outlets are designed in the air drying chamber and can comprehensively blow air to the panels to air-dry the panels. Moreover, the quick product spraying device integrates functions of spraying, drying and air drying, and the processing efficiency of spraying the panels is improved.
Owner:嘉善瑞佳运动器材有限公司

Reverse circulation drill for geological prospecting, and power head thereof

The invention provides a reverse circulation drill for geological prospecting, and a power head of the reverse circulation drill. The reverse circulation drill for geological prospecting is high in drilling efficiency. The power head comprises a rotating joint, a rotary box and a gas distributor, wherein the rotating joint, the rotary box and the gas distributor respectively comprise a rotating shaft, a main shaft and a mandrel which are hollow shafts arranged in a coaxial through way and are sequentially connected in a sealing way; the outer end of the rotating shaft is provided with a slag discharge hole; the main shaft is connected with a driving motor; the mandrel is internally provided with an inner tube in a coaxial way; the inner end of the inner tube is connected with the inner wall of the mandrel in a sealing way; the inner end of the inner tube is communicated with a hollow part of the main shaft is through; the outer diameter of the inner tube is smaller than the inner diameter of the mandrel; and at least one air inlet is arranged along the circumferential direction of the inner end of the mandrel, and compressed air enters the mandrel from through the air inlet. All the parts of the power head are independent of one another, so that the power head is convenient to assemble and disassemble; therefore, the sampling process is simplified, the quality of a sample is guaranteed, and the exploration efficiency is improved.
Owner:张家口市宣化正远钻采机械有限公司

All vanadium redox flow battery structure

The invention discloses an all vanadium redox flow battery structure, comprising at least two single batteries; the single battery comprises two liquid flow frames; an ion exchange membrane is arranged between the two liquid flow frames; liquid flow passages are respectively arranged on the two liquid flow frames; the liquid flow frames clamp the ion exchange membrane to respectively form a first hermetic liquid storage chamber and a second hermetic liquid storage chamber; carbon-based electrode materials are respectively arranged in the first liquid storage chamber and the second liquid storage chamber; a first liquid storage pot and a second liquid storage pot are respectively communicated with the liquid flow frames; the first liquid storage chamber is communicated with the first liquid storage pot via one liquid flow passage; the second liquid storage chamber is communicated with the second liquid storage pot via the other liquid flow passage; the single batteries are connected in series via a bipolar electrode. In the structure, derious liquid flow passages are arranged on the liquid flow frames, perfluorinated ion exchange membrane serves as the ion exchange membrane and flow passages or flow chutes are arranged on the external surfaces of the carbon-based electrode materials, thereby improving electric energy transfer efficiency and uniformity of single battery property.
Owner:QINGDAO WUXIAO GRP

Multi-string high-power lithium battery control board

The invention discloses a multi-string high-power lithium battery control board comprising a single chip computer control module, an equalization circuit, a battery management module and an LCD (Liquid Crystal Display) module; the single chip computer control module is used for detecting the voltage of a battery pack, and the battery management module is used for transmitting signals to the single chip computer control module; an end of the battery management module is used for detecting the temperature of the battery pack and the current flowing by a resistor via a first thermal resistor and a second thermal resistor; the positive pole of the battery pack is connected with a charge / discharge shared positive pole connection end, and the negative pole of the battery pack is connected with a discharge negative pole connection end sequentially via a resistor and a first field-effect tube and then connected with a charge negative pole connection end via a second field-effect tube; the charge and discharge of the battery pack is controlled by the single chip computer control module through the control over the connection and disconnection of the first and the second field-effect tubes; and the LCD module is also controlled by the single chip computer control module. With the adoption of the battery management module, the current, the temperature and the capacity are more accurately detected; and with the adoption of the single chip computer control module as a core, high accuracy and high efficiency are achieved, the balance of batteries is improved and the cycle lives of the batteries are prolonged.
Owner:昆山万金天宇贸易有限公司
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