12results about How to "Large fluctuations" patented technology

The invention discloses an endurance duration estimation method, an endurance duration estimation device, equipment and a storage medium, and the method comprises the steps: obtaining the estimated endurance duration of an energy storage unit in the round, and obtaining the allowable change time of the energy storage unit in the round; on the basis of a first duration difference between the estimated endurance duration and a historical reported endurance duration, the historical reported endurance duration and the allowable change time, obtaining the current reported endurance duration, the historical reported endurance duration being the endurance duration of the energy storage unit reported in the last round, and the historical reported endurance duration being the endurance duration of the energy storage unit reported in the last round; the difference value between the current reported endurance duration and the historical reported endurance duration is smaller than the allowed change time; and taking the current reported endurance duration as the endurance duration of the energy storage unit reported in the current round. By means of the method, the endurance duration jump can be avoided.

This invention relates to a boron-doped multi-element polyanionic sodium-ion battery cathode material and its preparation method, comprising the following steps: [The method involves] mixing Na₄Fe₂O₃ with... 3‑X B X (PO4) 2‑Y (SiO4) Y The stoichiometric ratio of P2O7 is determined by adding ferrous source, boric acid, sodium source, phosphorus source, and silicon source to water, followed by the addition of carbon source and mixing thoroughly to obtain a mixed slurry; wherein 0.2≤X≤0.5, 0<Y≤1; the mixed slurry is then ground to obtain a sand-milled slurry; the sand-milled slurry is dried to obtain precursor powder; under a protective atmosphere, the precursor powder is sintered at 450~550℃ to obtain boron-doped multi-element polyanion sodium-ion battery cathode material. The introduction of boron and silicon elements in this invention helps reduce raw material costs, improve the electrochemical performance of the material, especially enhancing the structural stability, rate performance, and cycle life of the cathode material, and also lowers the sintering temperature, meeting the requirements for cost reduction and efficiency improvement.

According to the method, the slurry can be accurately and stably supplied during coating, and the problem that the ground coating material is uneven due to fluctuation such as slurry deposition is solved. According to the method, the dressing coated on the base material is ensured to be stable and unchanged from the source from real-time detection of the density of the slurry and control of the volume of the supplied slurry (through pump speed control). And the purpose of high consistency is achieved.

The present invention relates to the technical field of cooling devices, and specifically to a rapid epidermis cooling device; it comprises a chassis, wherein a high-pressure air pump and a vortex tube are fixedly installed inside the chassis; a vortex chamber connected to the high-pressure air pump is provided at the upper end of the vortex tube; a refrigeration port and a heat exhaust port connected to the vortex chamber are provided at both ends of the vortex tube; an exhaust port is provided on one side of the chassis; the present invention enables a driving motor to drive the transmission gear to rotate through the gear shaft through the cooperation of the gear shaft and the transmission gear, so that the transmission gear drives the rotating drum to rotate, and when the rotating drum drives the through groove to rotate and cooperates with the arc groove of the baffle, the cold air in the vortex tube can enter the nozzle through the rotating drum and be sprayed out by the nozzle, so that there is no need to repeatedly start and stop the vortex tube, which not only avoids the increase of fluctuation of the refrigeration temperature and reduces the influence of temperature fluctuation on the treatment result, but also avoids the increase of starting power of the cooling system caused by frequent start and stop, thereby improving the overall energy efficiency.

The present application relates to the technical field of petroleum chemical industry, in particular to an automatic execution system and method for the material returning process of an ethylene cracking furnace, which comprises a state confirmation module before material returning, used for confirming initial parameters before material returning, and when the initial parameters are within an initial range, indicating that material returning can be performed, and when the initial parameters are not within the initial range, giving an alarm; a material returning process control module, used for controlling key parameters of material returning in the material returning stage, and issuing a material returning instruction, wherein the key parameters of material returning include the material returning rate of a single pipe of a furnace chamber and the material returning rate of a total pipe of the furnace chamber; and a material returning module, used for receiving the material returning instruction and performing material returning. By using the system, the state before material returning is confirmed by the state confirmation module before material returning, and the key parameters of material returning in the material returning process are controlled by the material returning process control module, which can effectively improve the accuracy of material returning, and has the advantages of high material returning efficiency, high safety and small fluctuation.

The invention relates to the technical field of tank-type storage and transportation equipment, and discloses a tank-type storage and transportation equipment temperature control method, which comprises the following steps: acquiring a heat transfer coefficient of tank-type storage and transportation equipment to an environment through a heat transfer coefficient test strategy, judging whether the heat transfer coefficient is valid or not, and if not, adopting a thermal insulation performance definition value of the equipment as the heat transfer coefficient; selecting a working mode according to the working condition of the cargo temperature sensor, and calculating the time length required by cargo temperature adjustment; in the adjusting process, the temperature of the cold and hot carrier is monitored and controlled in real time, the temperature adjusting duration is divided into discontinuous adjusting duration blocks, and the system conducts heating and cooling work in the blocks; the system recovers the temperature of the cold and hot carriers outside the blocks; through an accurate temperature control strategy, efficient temperature management of the tank type storage and transportation equipment under different working conditions is achieved, and safe storage and transportation of goods are guaranteed.

The invention relates to the technical field of metal processing and manufacturing, and discloses a metal melt surface tension measuring and calculating method. According to the method, the length 2a, the height h and the bottom length 2l of the metal ball are calculated by recognizing the coordinates of the end points of the molten metal ball. Firstly, end point coordinates of a metal ball are obtained through an image recognition technology; then, relevant geometric parameters of the small balls are calculated; and then, calculating the surface tension of the metal melt according to a known physical model by utilizing the geometric parameters. Compared with a traditional surface tension measuring method, the method has the advantages that complex ellipse fitting is not needed, the contact angle does not need to be solved, and therefore the calculation process is simplified. In addition, the method provided by the invention has the advantages of higher identification precision, strong anti-interference capability and shorter calculation steps, and occupies less memory space after programming is realized. The method not only improves the measurement efficiency, but also reduces the requirement on hardware equipment.

The present invention discloses an automatic cleaning device and process for a viscose filament combing assembly, and relates to the technical field of cleaning of viscose filament combing assembly. The present invention comprises an alkali solution soaking mechanism and a cleaning box, and a loading rack, a cleaning box, an air drying box and an inspection table arranged side by side are fixed to one side of the discharge end of the alkali solution soaking mechanism, and the loading rack and the inspection table are connected by a feeding mechanism, and the feeding mechanism crosses the cleaning box and the air drying box. In order to meet the demand for natron inlet and outlet, the present invention designs the natron pool assembly into a multi-layer stepped shape, which can increase the natron amount of the combing assembly per unit area, realize batch and automatic cleaning of the combing assembly, improve production capacity, and each layer of the natron pool assembly can be operated independently, which improves applicability.

The invention discloses automatic cleaning equipment and process for a viscose filament yarn combing device assembly, and relates to the technical field of viscose filament yarn combing device assembly cleaning. The device comprises an alkali liquor soaking mechanism and a cleaning box, a feeding frame, the cleaning box, an air drying box and an inspection table which are arranged side by side are fixed to one side of the discharging end of the alkali liquor soaking mechanism, the feeding frame and the inspection table are connected through a conveying mechanism, and the conveying mechanism transversely penetrates through the cleaning box and the air drying box. In order to meet the alkali soaking feeding and discharging requirements, the alkali soaking pool assembly is designed to be in a multi-layer step shape, the alkali soaking amount of the silk combing device assembly in the unit area can be increased, batch and automatic cleaning of the silk combing device assembly is achieved, the productivity is improved, each layer of alkali soaking pool assembly can be independently operated, and the applicability is improved.

The invention provides an evaluation bandwidth determination method and device, electronic equipment and a storage medium. The method comprises the following steps: obtaining the delay of a network link between a server and a client; under the condition that the change information of the delay of the network link meets a preset condition, determining whether the server is in an application limited sending state or not; under the condition that the server is in the application limited sending state, determining the evaluation bandwidth of the network link at the current moment; and the evaluation bandwidth is reduced to obtain the optimized evaluation bandwidth, so that excessive fluctuation of the evaluation bandwidth can be avoided, and the influence on the quality of pictures received by players is reduced.

The present invention provides a coordinated control system and method for a condensate system of a power plant based on feedforward compensation, wherein the first feedforward controller is constructed using the measured value of the condensate flow rate as a feedforward signal for hot well water level control; the second feedforward controller is constructed using the measured value of the condensate pressure as a decoupling control signal for deaerator water level control; and the third feedforward controller is constructed using the measured value of the deaerator water level as a decoupling control signal for condensate pressure control. The present invention solves the control problem of independent control of the three sub-loops and poor stability of the whole system in the traditional control scheme through the organic coordinated automatic control of the three control sub-loops of hot well water level, deaerator water level and condensate pressure in the condensate system, and realizes that the hot well water level, deaerator water level and condensate pressure control loops quickly reach a balance when the unit load changes rapidly and frequently, thereby enhancing the robustness of the whole condensate control system and meeting the full-condition operation control needs of the unit.

This invention provides a heat exchange tube and a heat exchanger. The heat exchange tube includes a tube body, an outer fin structure, and an inner rib structure. The heat exchange tube and heat exchanger provided by this invention have an outer fin structure on the outer wall of the tube body. This outer fin structure disturbs the fluid flowing through the outer wall of the tube body, causing the fluid to drip off the outer fin structure. This avoids the problem of fluid accumulating on the lower side of the tube body due to gravity within the channels defined by the outer fin structure, and also avoids fluid bridging between adjacent outer fin structures that could submerge the heat exchange area, thereby improving the external heat exchange efficiency of the heat exchange tube. Furthermore, an inner rib structure is provided on the inner wall of the tube body, forming a first spiral flow channel and a second spiral flow channel. This secondary disturbance increases the fluid ripple at the inner wall of the tube body. The outer fin structure and the inner rib structure enhance heat exchange in the heat exchange tube, thereby effectively improving the heat exchange efficiency of the heat exchange tube.