47results about How to "Maximum Efficiency Utilization" patented technology

The invention relates to a nanometer molten binary nitrate heat-transfer heat-storage medium and a preparation method thereof and belongs to the field of solar photo-thermal electricity generation. The nanometer molten binary nitrate heat-transfer heat-storage medium is characterized in that nano-particles are dispersed in a KNO3-NaNO3 and KNO3-NaNO2 solid-liquid phase-change molten binary nitrate system at a high temperature so that the nanometer molten binary nitrate heat-transfer heat-storage medium is compounded, and the nano-particles comprise SiO2, ZnO, Al2O3, TiO2, CaO and / or MgO nanoparticles. The nanometer molten binary nitrate heat-transfer heat-storage medium solves the problem that the existing nanometer molten binary nitrate system has a low heat conductivity coefficient, poor heat stability and a narrow use temperature scope and can be widely used in the technical field of solar photo-thermal electricity generation.

The invention discloses a stereo garage. The stereo garage is characterized by comprising a plurality of layers of carrying stages and a lifting device; the carrying stages comprise a plurality of concentric annular parking strips capable of rotating around the circle center; the lifting device is arranged in the carrying stages; the carrying stages are used for parking vehicles; the lifting device is used for lifting of the vehicles; and the carrying stages communicate with one another through the lifting device. The vehicles pass through the parking strip located on the inner circle and reach the parking strip located on the outer circle, and no channel allowing the vehicles to get in and get out needs to be arranged additionally; and except the parking strips on the two inner circles need to reserve a channel allowing the vehicles to get in and get out, the vehicles can park in any other positions of the parking strips, and accordingly the space can be utilized with the highest efficiency.

The invention relates to a method for preparing paper through waste textile fibers. The method comprises the following steps of: taking the waste textile fibers and products as raw materials; sorting, opening, decontaminating, cleaning and accurate grinding the waste textile fibers; modifying the fibers; preparing sizes; forming paper sheets; hot pressing; and hot pressing and preparing the paper sheets at the temperature of 100-280 DEG C and the pressure of 0.2-1.2 KN / cm, wherein the basis weight is 13-48g / m<2>, the tightness is 0.31-0.78g / cm<3>, the evenness index is 62-78, the tensile index is 27-223Nm / g, the tear index is 7.6-26.2mN.m<2> / g, the burst index is 2.67-7.15kPa.m<2> / g, and a surface contact angle of static water is 20-90 degrees. Compared with traditional plant fiber papermaking, the performance is improved greatly. The method can be realized through equipment of textiles and paper, and the process flow is simple, the adaptability is strong. The method provides a recycling processing way for the waste textile fibers, and also provides new raw materials for pulping and papermaking.

The implementation of the invention provides a mobile terminal information subscription method, system and device. The method comprises the following steps: an information subscription candidate list is sent by a server to a mobile terminal, an information subscription directory is selected by the mobile terminal from the information subscription candidate list, and the information subscription directory is sent to the server; information subscription content related to the information subscription directory is determined by the server, and the information subscription content is sent to the mobile terminal; and the subscription information content is analyzed by the mobile terminal, and the subscription information content is displayed on the mobile terminal. According to the implementation of the invention, the information acquisition efficiency of the mobile terminal can be improved, and the workload of the server can be reduced. The implementation of the invention can be applied into various terminals, and the implementation of the invention can be used across platforms and across terminals, so the advantage of wide application range can be realized.

The invention discloses a method for grading silver powder for a solar battery, and the method comprises the following steps of: adding a dispersant agent to deionized water to prepare a 0.1%-2% by weight of dispersant agent water solutions; adding metal silver powder to the dispersant agent water solutions, and mixing into a solid-liquid system with solid content controlled at 1%-30% by weight; then carrying out mechanical dispersion to obtain uniformly dispersed slurry; collecting the slurry through a screen mesh of 40-600 meshes, adding to a stirring kettle, delivering to a hydraulic cyclone by using a booster pump, wherein the outlet pressure of the booster pump is controlled at 0.2-1.6 MPa, the inlet flow rate of the hydraulic cyclone is controlled at 5-30m<3> / h, and the overfall outlet flow rate of the hydraulic cyclone is controlled at 0.3-3m<3> / h; controlling the grading time of the hydraulic cyclone at 1-1.5 h, and collecting the slurry positioned on the overfall outlet of the hydraulic cyclone to obtain the silver powder for the solar battery. The method disclosed by the invention has the advantages of grading efficiency guarantee, simple process, low cost, safety and environmental friendliness and can ensure that the powder dispersibility meets the use requirement of the silver powder for the solar battery.

The invention discloses a passing point control method based on a double-axis photovoltaic tracking system. According to the passing point control method based on the double-axis photovoltaic tracking system, whether passing point tracking is conducted or not is determined by comparing the position of the track of the sun and the track of a double-axis photovoltaic tracking device, it is indicated that the position of the tracking device is left behind by the track S1 of the sun when the elevating angle (S0H) or the azimuth angle (S0W) of the tracking device is smaller than the corresponding elevating angle (S1H) or the corresponding azimuth angle (S1W) of the track of the sun, namely, S0H-S0H>M1, SW-GW>M2, (M2 is the tracking threshold value of passing point tracking), and the tracking device is controlled to conduct tracking for the distance of 2M along the moving track of the sun at the moment so that the tracking device can be in front of the actual position of the sun by M. Due to the fact that the sun moves along the fixed track, the difference between the position of the tracking device and the position of the sun is firstly reduced to 0 from M and then is increased to M from 0, and the steps are executed again when the sun is in front of the tracking device by the distance of M. According to a double-axis photovoltaic tracking power generator adopting the passing point control method, the annual average electric energy production can be increased by 0.05%.

The invention discloses a universal distributed acquisition system which comprises a seed storehouse, a task scheduling module, a data capture module and a regular text page storehouse, wherein the seed storehouse is used for storing a URL (Uniform Resource Locator) of a required site and setting an information source category and an acquisition time interval; the task scheduling module is used for coordinating a task load of each acquisition node; the data capture module is used for performing information capture on the distributed acquisition tasks, wherein the information capture is divided into list page capture and regular text page capture; the task scheduling module and the data capture module comprise servers and clients and both adopt distributed communication frameworks; and the regular text page storehouse is used for storing the parsed regular text web page link and providing a site gate for the regular text page in the data capture module.

The method is used to solve the problem being not capable of implementing roaming between the networks not singing roaming agreement. When the current network do not sign a roaming agreement with user home network and a third party network has already signed an agreement with the current network, the method comprises: when a home network user end roams into the current network, the communication between said user end and other user end is implemented by using a third party network to make switch between the slave IMSI (international mobile subscriber identification number) and master IMSI; the said slave IMSI registers at the home location register of third party network, and said master IMSI registers at the home location register of the home network. The invention also reveals an agent network and a user end.

The invention discloses a tunable laser pumping system and a method for obtaining a tunable laser by using the same and belongs to the optical field. The tunable laser pumping system solves a problem that it is difficult for a conventional high-energy tunable laser pumping optical path implemented by an optical beam splitter with a fixed splitting ratio to cater to the optimum pumping conditions of various tunable laser materials. A servo motor is used for driving a beam splitter with gradually-changed reflectivity to move in order that the laser spots emitted to the beam splitter with gradually-changed reflectivity laterally moves on the surface of the beam splitter with gradually-changed reflectivity. Laser reflected by the beam splitter with gradually-changed reflectivity is used as a pumping source of an oscillator. The oscillator outputs a tunable seed laser under the effect of the pumping source and the tunable seed laser is emitted to an amplifier. The laser transmitting the beam splitter with gradually-changed reflectivity is emitted to a total reflector. The laser reflected by the total reflector is emitted to the amplifier used as pumping light. The amplifier outputs the tunable laser after amplifying the tunable seed laser with the pumping of the pumping light. The tunable laser pumping system is used for outputting high-energy tunable laser.

The invention discloses a lightning conductor with solar energy and windmill power generation. The lightning conductor comprises a lightning arrester, a pedestal and a conductive rod and further comprises a hollow supporting column, wherein the supporting column is arranged on the conductive rod in a sleeving manner; the conductive rod is grounded; the upper end of the conductive rod upwards extends out of the supporting column; a windmill for wind power generation and a plurality of solar power generation panels are mounted on the supporting column, an energy storage box is placed in the pedestal, and the windmill and the solar power generation panels are electrically connected with the energy storage box; a ring of slide rail is fixedly arranged on the outer wall of the supporting column in a sleeving manner, a sliding block is slidably positioned on the slide rail, a wireless controller is fixedly arranged on the sliding block, the wireless controller can control the sliding block to slide and position on the slide rail, and the windmill is fixedly arranged on the sliding block; the solar power generation panels are fan-shaped, two positioning boxes are fixedly arranged on the supporting column, a notch is formed in each of the positioning boxes, a supporting plate is fixedly arranged on the bottom face of each of the solar power generation panels, and the supporting plate is arranged through the notch and swings up and down and is positioned in each of the positioning boxes. The lightning conductor disclosed by the invention can be used for utilizing wind energy and solar energy with maximum efficiency.

The invention discloses an electric vehicle charging device and method suitable for a bus station or a logistics field station, and belongs to the technical field of new energy automobiles; the electric vehicle charging device comprises a plurality of charging guns; a switch matrix comprises a plurality of charging passage groups; each charging passage group is provided with a charging passage, and each charging passage is provided with a relay; the control ends of all the relays are connected with a control module; a power supply module comprises a plurality of charging module groups, and each charging module group is connected with an auxiliary alternating current contactor; the control end of each auxiliary alternating current contactor is connected with the control module; each charging module group comprises at least one charging module, and the output ends of the charging modules are connected with the charging passage groups respectively, so that the charging guns can be flexibly arranged and the requirements on the site can be reduced to the maximum extent, different charging strategies under different conditions can be realized, the temporary scheduling requirement is guaranteed, the electricity consumption cost is effectively lowered, and the purposes of maximizing economic and social benefits of equipment are achieved.

The invention discloses an energy-saving and environment-friendly spray drying system. A spray drying chamber is connected with a cyclone separator; the cyclone separator is connected with a heat exchanging chamber; the heat exchanging chamber is internally provided with a heat exchanging pipe; a condensed water tank is internally provided with a condensing pipe; one end of the heat exchanging pipe is connected with the spray drying chamber through a heater and the other end of the heat exchanging pipe is connected with one end of the condensing pipe and a solvent recycling pot; the other end of the condensing pipe is connected with the bottom of the heat exchanging chamber; the upper part of the spray drying chamber is provided with a spraying nozzle and the lower part of the spray drying chamber is connected with a second drying finished-product collecting box; and the lower part of the cyclone separator is connected with a first drying finished-product collecting box. According to the energy-saving and environment-friendly spray drying system, under the state of ideal heat insulation conditions and sealing conditions, the heat is utilized to the greatest extent and a solvent is not discharged or does not have any loss. Energy sources are greatly saved and the environment is protected; meanwhile, the solvent is recycled so that the production cost is greatly reduced; and external air is prevented from being used and secondary pollution of a product is avoided.

The invention discloses a nitrogen-assisted carbon dioxide fracturing and developing integrated method for a shale oil reservoir. The nitrogen-assisted carbon dioxide fracturing and developing integrated method comprises the steps that nitrogen-assisted carbon dioxide is used for conducting fracturing operation on a target shale oil reservoir; after the fracturing operation is completed, carbon dioxide gas is injected into the target shale oil reservoir, and nitrogen gas is subsequently injected into the target shale oil reservoir for pushing the carbon dioxide gas into the deep part of the oil reservoir; soaking operation is conducted on the target shale oil reservoir; after well soaking is finished, the well is opened to implement depletion production; production is conducted in a firstperiod; and in the subsequent production process, the volume of an injected gas slug and the soaking time are 1.5 times those of the previous period, and the operation of the step 5 to the step 7 is repeated in each period. According to the method, the recovery ratio of the shale oil reservoir is increased to the maximum extent; the carbon dioxide gas is utilized to the maximum extent, so that thedevelopment of the shale oil reservoir is more economical and efficient; and fracturing and development are integrally designed, so that field operation is processized and standardized, and differentdepartments can establish closer cooperation.

The invention provides an emergency device for treating port ballast water through ultraviolet rays, photocatalysis and strong oxidation. The device comprises a reaction box, slant quartz plates and common fixing plates are sequentially arranged in a box body, and a catalytic material is sprayed on the slant plates. By changing slant angles and the water film thickness of the slant plates, it canbe guaranteed that water films meet the discharging requirement of the ballast water in the process that the slant plates fall up and down through a synergistic effect between ultraviolet radiation and photocatalysis according to the actual volume and the water quality condition of the ballast water. Ultraviolet lamps are arranged on the back faces of the quartz plates, can simultaneously illuminate water flow on the quartz plates and non-transparent plates, and are efficiently used. The ultraviolet lamps are not in contact with the ballast water, the physical property of the water cannot be changed, dirt cannot be attached to the ultraviolet lamps, and the penetration rate of ultraviolet rays is guaranteed. According to the emergency device, the ultraviolet lamps can be maximally used, energy consumption is small, and aims of being environmentally friendly and capable of saving energy are achieved; the treating speed is high, and the emergency treating requirement is met; modularization can be achieved, and the emergency device meets the using requirements of various ballast capacities.

The invention relates to a sub-mother unmanned aerial vehicle unit based on a folded combination form in the technical field of unmanned aerial vehicles. The sub-mother unmanned aerial vehicle unit comprises a mother unmanned aerial vehicle and sub-unmanned aerial vehicles, wherein two sub-unmanned aerial vehicles are connected and located on the side wings of the two sides of the mother unmannedaerial vehicle respectively. The invention further provides the sub-mother unmanned aerial vehicle unit based on the folded combination form and a combination method thereof. Through the design of thefolding deformation combining technology, the contradiction between the number of putting of the cluster unmanned aerial vehicle and the limited space of an aerial carrier can be effectively solved.

A timing temperature control device for biogas comprises a tank and a printed circuit board (PCB), wherein the tank comprises a key group used for setting time and corresponding temperatures; the PCB is arranged in the tank and comprises a single chip microcomputer (SCM), a memory and a timer; the memory is used for storing the time and corresponding temperatures set in the key group; the SCM is connected with a first temperature sensor, a concentration sensor, a heating unit, a water pump and the memory respectively, and used for obtaining the fermentation broth temperature detected by the first temperature sensor, reading the current time of the timer, obtaining corresponding set temperature according to the current time, the set time and corresponding temperature, and comparing the fermentation broth temperature with the set temperature; and if the fermentation broth temperature is smaller than the set temperature, the SCM triggers the heating unit to heat the fermentation broth to enable the fermentation broth temperature to reach the set temperature. Different temperature maintenance at different moments for a biogas digester is achieved through the device.

The invention relates to a universal wind gathering floor type breeze electric generator based on a Venturi effect. The problems that an existing wind driven generator can not normally generate electricity in places where the wind power is small and the wind speed is low, the structure of equipment is complex, the manufacturing cost is high, and the ecological environment is damaged are mainly solved. The universal win gathering floor type breeze electric generator based on the Venturi effect comprises a wind power collecting unit, a wind power accelerating unit and an additional unit. The wind power collecting unit is composed of an inner wall face, an outer wall face and a partition plate, wherein the inner wall face and the outer wall face are gradually contracted along a flow channel, and the partition plate is arranged between the inner wall face and the outer wall face. The wind power accelerating unit is composed of a wind power transition tube, a Venturi tube and a diffuser tube. The additional unit comprises a power generation unit, an outer support, a one-way door wind shielding device and a wind speed measuring device. The universal air gathering floor type breeze electric generator based on the Venturi effect can be applied to the breeze electricity generation field.

An AGV route optimization and real-time scheduling method comprises a mathematical planning method, a simulation method and an artificial intelligence method. The mathematical planning method can select an optimal task and an optimal path for an AGV and can be summarized into a task scheduling method, and the mathematical planning method adopts integer planning, dynamic planning and petri methods. The simulation method is used for carrying out computer analog simulation on implementation of a scheduling scheme of an AGV through modelling an actual scheduling environment, and the simulation method adopts a discrete event simulation method, an object-oriented simulation method and a three-dimensional simulation technical method. The artificial intelligence method describes the scheduling process of the AGV as a process of searching an optimal solution in a solution set meeting constraints, and the artificial intelligence method strives to give a satisfactory solution by using a knowledge representation technology and various search technologies at the same time. The artificial intelligence method further adopts an expert system method, a genetic algorithm, a heuristic algorithm and a neural network algorithm.

The invention discloses a flat panel integrated LED lamp capable of generating and storing power. The LED lamp is provided with a frame serving as a supporting frame, the two sides of the frame are provided with a flat panel LED lamp body and a photovoltaic cell assembly respectively, a storage battery and a power generating and storing drive control circuit are arranged in a cavity in the middle of the frame, the photovoltaic cell assembly is connected with the flat panel LED lamp body and the storage battery in parallel through the power generating and storing drive control circuit, and the storage battery is connected with the flat panel LED lamp body through the power generating and storing drive control circuit. The LED lamp is low-voltage and direct-current in the whole power transmission process, conversion from direct currents to alternating currents, and then from the alternating currents to the direct currents in a traditional scheme is avoided, and energy consumption is reduced. A digital signal control circuit is led in so as to achieve intelligent control balance among power output of the photovoltaic cell assembly, charging and discharging of the storage battery and power consumption of the flat panel LED lamp body, and therefore solar energy is used at maximum efficiency.

The invention discloses an industrialization production method for a diacetate fiber non-woven fabric filter stick base material for cigarettes. The production method is characterized in that a non-woven fabric mechanical net formation mode and a spunlaced process reinforcement technology are adopted for preparing the filter stick base material. According to the production method, under the circumstance of achieving stable production by adopting the process technology, the high performance of acetate fibers can be utilized at the highest efficiency; according to the provided complete set, theprocess technology route is mature, the process route is short in process, the production efficiency is high, and industrialization production for the diacetate fiber non-woven fabric filter stick base material can be achieved; according to the method, in the process of preparation of a non-woven fabric filter material, harmful substances cannot be introduced, a production workshop is clean in environment, the production cost is low, and the product meets the requirements of the theme of green and environmental protection.

The invention discloses an electric charge calculating method, which comprises the following steps: the connection between a control server and a calculating server is set up; the control server obtains an electric charge calculating request sent by a client and a state parameter of the calculating server connected with the control server in real time; the control server generates an electric charge calculating order according to the electric charge calculating request and a state parameter, sends the electric charge calculating order to a corresponding calculating server; the calculating server performs the electric charge calculating order and generates an electric charge value; the calculating server sends the electric charge value to a data center to store; the calculating server generates an ending signal and sends to the control server. The invention further discloses a control server, a calculating server and an electric charge calculating system. By adopting the electric charge calculating method, the number of the calculating server can be dynamically adjusted, the pressure is spread on a plurality of calculating servers worked at the same time; and therefore, the utilization rate of the calculating resource is improved, and the elastic expansion of the resource is realized.

The invention relates to a power generation device, in particular to a vehicular wind power generation device, and belongs to the technical field of electric power devices. The vehicular wind power generation device comprises a shell, a wind wheel, a generator and a storage battery, the generator is arranged in the shell and connected with the storage battery through a lead, a speed increasing mechanism, a rectifier and a charger are arranged in the shell, a low-speed shaft of the speed increasing mechanism extends out of the shell and is connected with a wind wheel hub, an output end of a high-speed shaft of the speed increasing mechanism is connected with a motor shaft of the generator, the rectifier is arranged between the generator and the storage battery, the charger is arranged between the rectifier and the storage battery, the motor shaft of the generator is perpendicularly arranged, and the wind wheel hub is perpendicular to the motor shaft of the generator. The device is simple and compact in structure, reasonable and scientific in design, small in size and high in practicability.

The invention relates to a method for preparing paper through waste textile fibers. The method comprises the following steps of: taking the waste textile fibers and products as raw materials; sorting, opening, decontaminating, cleaning and accurate grinding the waste textile fibers; modifying the fibers; preparing sizes; forming paper sheets; hot pressing; and hot pressing and preparing the paper sheets at the temperature of 100-280 DEG C and the pressure of 0.2-1.2 KN / cm, wherein the basis weight is 13-48g / m<2>, the tightness is 0.31-0.78g / cm<3>, the evenness index is 62-78, the tensile index is 27-223Nm / g, the tear index is 7.6-26.2mN.m<2> / g, the burst index is 2.67-7.15kPa.m<2> / g, and a surface contact angle of static water is 20-90 degrees. Compared with traditional plant fiber papermaking, the performance is improved greatly. The method can be realized through equipment of textiles and paper, and the process flow is simple, the adaptability is strong. The method provides a recycling processing way for the waste textile fibers, and also provides new raw materials for pulping and papermaking.

The present invention proposes an ultraviolet photocatalytic strong oxidation port ballast water emergency treatment device. The device includes a reaction box in which an inclined quartz plate and a common fixing plate are sequentially arranged, and the inclined plate is sprayed with catalytic materials. By changing the inclination angle of the inclined plate and the thickness of the water film, according to the actual ballast water volume and water quality, the synergistic effect of ultraviolet irradiation and photocatalysis can be used to ensure that the water film meets the discharge requirements of ballast water during the process of falling on the inclined plate. The ultraviolet lamp is arranged on the back of the quartz plate, which can irradiate the water flow on the quartz plate and the opaque plate at the same time, and efficiently utilizes the ultraviolet lamp. And the UV lamp does not directly contact the ballast water, it will not change the physical properties of the water, and there will be no dirt attached to the UV lamp to ensure the penetration rate of the UV. The device of the invention can maximize the use of ultraviolet lamps, has low energy consumption, and realizes the purpose of environmental protection and saving; the processing speed is fast, and the emergency processing requirements are met; modularization can be realized, and the use of ships with various ballast capacities can be satisfied.

The method is used to solve the problem being not capable of implementing roaming between the networks not singing roaming agreement. When the current network do not sign a roaming agreement with user home network and a third party network has already signed an agreement with the current network, the method comprises: when a home network user end roams into the current network, the communication between said user end and other user end is implemented by using a third party network to make switch between the slave IMSI (international mobile subscriber identification number) and master IMSI; the said slave IMSI registers at the home location register of third party network, and said master IMSI registers at the home location register of the home network. The invention also reveals an agent network and a user end.

The invention discloses a method for grading silver powder for a solar battery, and the method comprises the following steps of: adding a dispersant agent to deionized water to prepare a 0.1%-2% by weight of dispersant agent water solutions; adding metal silver powder to the dispersant agent water solutions, and mixing into a solid-liquid system with solid content controlled at 1%-30% by weight; then carrying out mechanical dispersion to obtain uniformly dispersed slurry; collecting the slurry through a screen mesh of 40-600 meshes, adding to a stirring kettle, delivering to a hydraulic cyclone by using a booster pump, wherein the outlet pressure of the booster pump is controlled at 0.2-1.6 MPa, the inlet flow rate of the hydraulic cyclone is controlled at 5-30m<3> / h, and the overfall outlet flow rate of the hydraulic cyclone is controlled at 0.3-3m<3> / h; controlling the grading time of the hydraulic cyclone at 1-1.5 h, and collecting the slurry positioned on the overfall outlet of the hydraulic cyclone to obtain the silver powder for the solar battery. The method disclosed by the invention has the advantages of grading efficiency guarantee, simple process, low cost, safety and environmental friendliness and can ensure that the powder dispersibility meets the use requirement of the silver powder for the solar battery.

The invention discloses an LED tissue culture bed frame for industrialization and an LED tissue culture lamp tube thereof. The LED tissue culture bed frame comprises a goods shelf type bed frame, strip-shaped LED light bars arranged on each layer of the tissue culture bed frame, tissue culture discs arranged in each layer of the goods shelf type bed frame space and tissue culture bottles arrangedin the tissue culture discs, and the tissue culture bed frame is provided with tissue culture disc bearing frames composed of side guide rail strips and middle guide rail strips; the bottom of each tissue culture disc is provided with light holes; the disc bottoms of the tissue culture discs are arranged on the side guide rail strips and the middle guide rail strips, and the LED tissue culture bedframe which is completely pervious to light from top to bottom is obtained; and the LED tissue culture lamp tube is adopted as each LED light bar and comprises a lens, an LED chip and a lamp plate, the outer side of the lens is a smooth surface, the inner side of the lens is a free hook surface, the LED chip is arranged on the inner side of the lens to form an LED lamp bead, more than two LED lamp beads are installed on the lamp plate in a linear mode, and the lamp plate is fixed to a strip-shaped bracket to form a long-strip-shaped lamp tube.

The invention relates to a data transmission method and system, comprising: the sender initiates a data transmission request to a plurality of receivers; the receiver returns response of the data transmission request to the sender, and selects data source from which obtaining each data fragment according to data fragment index information, in order to obtain data in fragment. The sender stores the data to be transmitted to a server after receiving the response of the first data transmission request; and sends the data fragment identifier information contained in the request for obtaining datafragment and the receiver address to the data transmission server; the data transmission server sends the data fragment to the receiver according to data fragment identifier information and receiver address. The invention realizes the process that single user transmits file or multimedia content to a plurality of users simultaneously, in order to effectively avoid bandwidth bottleneck in the sender to use the network bandwidth with maximal efficiency.

The invention discloses an independent photovoltaic intelligent control method and device capable of fast charging. The method includes 1) dividing the storage battery into two groups, and the electric energy output by solar energy is sent to the two groups respectively through a DC-DC1 conversion module and a DC-DC2 conversion module. Battery charging; 2) The initial stage of charging; 3) When a group of batteries enters the fast charging mode, the battery pack 1 and battery pack 2 switch to the pulse charging mode; 4) In the pulse charging mode, the charging pulse of a group of batteries stops During charging intervals, discharge to another set of batteries; 5) When supplying power to the load, the first battery set supplies power to the load through the DC-DC1 conversion module, and the second battery set supplies power to the load through the DC-DC2 conversion module. The beneficial effect of the invention is that the charging speed and charging efficiency of the storage battery can be effectively improved, and the contradiction between the design requirements of the storage battery redundancy in an independent photovoltaic system and the difficulty of charging the storage battery within a day's sunshine is overcome.