58results about How to "Overcome volatility" patented technology

The invention discloses a reactive voltage control partitioning method under wind power integration. The method comprises the steps as follows: a whole network electrical distance expected matrix considering wind electricity power probability characteristics takes the place of an electrical distance matrix under one power flow section to be used as a partitioning basis; PQ node partitioning is achieved on the basis of AP clustering; the voltage regulation sensitivity of a PV node region considering the wind electricity power probability characteristics is defined by a perturbation method; PV nodes ranked on the basis of the region sensitivity are partitioned; the regional connectivity and controllability are firstly considered in node partitioning; and meanwhile, the condition that the PV nodes are classified into a PQ region which is the most sensitive in control can be ensured to the maximal extent. An index evaluation result shows that the partitioning scheme obtained by the method obtains a good effect; and an auxiliary reference can be provided for voltage control under wind power integration.

The invention discloses a voltage automatic calibration device, which includes a high precision voltage reference source, multichannel transfer relays, a voltage acquisition module and a single chip control unit, wherein one end of each of the channel transfer relays is respectively connected with the high precision voltage reference source, the other end of each of the channel transfer relays is connected with each of voltage acquisition channels of the voltage acquisition module respectively, the single chip control unit is connected with a control end of each of the channel transfer relays and is connected with the voltage acquisition module through a controller area network (CAN) bus, thereby obtaining channel acquisition voltage of the voltage acquisition module and finishing the calculation of voltage calibration value. The single chip control unit performs voltage calibration on the voltage acquisition module through the CAN bus. Without manual operation, the voltage automatic calibration device avoids battery voltage discretization errors and personal errors, and can guarantee that voltage acquisition precision is promoted from 10 m V to 2 m V.

The invention discloses a dynamic weighting evolution positioning system and a dynamic weighting evolution positioning method based on received signal strength indicator (RSSI) of two nodes. According to the dynamic weighting evolution positioning system and the dynamic weighting evolution positioning method, real-time position estimation is performed through acquiring position numbers of two wireless signal transmission nodes based on the dynamic weighting evolution positioning method. A positioning solution which is provided according to the invention is a one-dimensional dynamic weighting evolution positioning solution based on RSSI, wherein an information exchange between a to-be-positioned node and a reference node is not required. Compared with a traditional positioning technique based on RSSI, the positioning solution is advantageous in that quick positioning with advantages of high efficiency and high precision can be realized.

The invention discloses a power grid demand side dispatchable capacity prediction method and belongs to the technical field of intelligent power grid and computer data mining intercrossing. According to the method, basic user information, user interruption capability and user interruption wishes influencing the demand side dispatchable capacity are fully considered, further the most important influence factor is selected from the basic user information, the user interruption capability and the user interruption wishes, the selected influence factor is quantized in a grading mode, and a demand side dispatchable capacity prediction model is constructed in combination with a neural network. The invention further discloses a power dispatching method adopting the prediction method. Compared to the prior art, the method has higher prediction precision and accuracy, and can provide powerful data support for applications of power grid dispatching, electricity price setting, power grid reliability analysis and the like.

The invention discloses a direct-current vehicle traction system and relates to the technical field of traction power. The direct-current vehicle traction system is used for solving the problems that in the prior art, energy cannot flow in a bidirectional mode, and the equipment safety is threatened due to the fact that the voltage of a direct-current electric network is increased during vehicle regenerative braking. The direct-current vehicle traction system comprises a filter circuit, a traction braking circuit and a processor. The traction braking circuit comprises a power supply input positive pole A+ end which is sequentially connected with a first brake resistor, a first current transformer, a first motor device, a second traction contactor, a first inductor and a first GTO thyristor in series through a first traction contactor, finally, the power supply input positive pole A+ end is connected to a power supply input negative pole A- end, and the first inductor is connected with the positive pole of the first GTO thyristor; the power supply input positive pole A+ end is sequentially connected with a second motor device, a second current transformer, a second brake resistor, a second traction contactor, the first inductor and the first GTO thyristor in series through the first traction contactor; and the contactors, a current sensor, a voltage sensor and the thyristor are all connected with the processor.

This invention is a secondary throttle H type vehicle air conditioner thermostatic expansion valve with filter structure. It includes valve body, valve port throttling channel, valve port throttling fore-channel, valve port throttling back-channel and connecting holes. The channel cross section of throttling hole is smaller than the maximum cross section of valve port throttling channel. There is filtering net between connecting hole and valve port throttling fore-channel. It is fixed by clamping spring. High pressure liquid refrigerant undertakes double throttling. It increases the energy efficiency ratio and refrigerating volume. The filtering net can ensure refrigerating system work well.

The invention provides a CBD production method of Mg-doped ZnO nanorods. The method comprises the following steps: dissolving zinc acetate and magnesium acetate in deionized water to prepare a zinc acetate solution, dropwise adding hexamethylenetetramine to the zinc acetate solution under a magnetic hot stirring condition, obliquely placing a cleaned glass substrate in the stirred solution after whole titration is completed, and growing a one-dimensional ZnMgO nanomaterial in the closed solution. The solution is prepared from zinc acetate, magnesium acetate and hexamethylenetetramine, a titration reaction of the hexamethylenetetramine is carried out, and the ternary alloy compound ZnMgO nanomaterial is formed through a chemical bath deposition technology. Addition of a proper amount of Mg makes the forbidden band width of ZnO be wider than that of a bulk material, and the nanostructure of the ZnO is successfully doped with Mg.

The invention relates to a matte manufacturing solution of solar energy single crystal silicon wafers and its preparation method. The method comprises the following steps: adding 18megohm water in a solvent preparation device, stirring and successively adding triethanolamine, tetramethyl ammonium hydroxide (TMAH), a surfactant and sodium silicate, stirring for 20-40 minutes, completely dissolving under the temperature of 5-25 DEG C, and filtering to obtain the finished product matte manufacturing solution. The surface of the single crystal silicon wafers forms a suede structure full of pyramids. The suede structure formed on the solar cells can reduce the reflectivity of the surface, form a light trap in the internal part of the cell, and increase the transition efficiency of the solar cell substantially.

The invention discloses a hybrid electric vehicle (HEV) mode switching process control device and method. The HEV mode switching process control device comprises an engine, a clutch, a motor, a general control unit, an engine ECU controller, a transmission TCU controller and a motor MCU controller, and an output shaft of the engine is connected with a rotating shaft of the motor through the clutch; the general control unit is connected with the engine through the engine ECU controller, the general control unit is connected with the clutch through the transmission TCU controller, and the general control unit is connected with the motor through the motor MCU controller; and rotating speed sensors are arranged on the engine and the motor correspondingly, the clutch is provided with a pressuresensor, and the rotating speed sensors and the pressure sensor are all connected with the general control unit. According to the HEV mode switching process control device and method, the structure issimple, operation is convenient, through two fuzzy controllers of the transmission TCU controller, vehicle dynamic impact is suppressed, and the advantages of easy control and the high control efficiency are further achieved.

The invention discloses an anionic and cationic surface active agent compound disinfectant technology. The anionic and cationic surface active agent compound disinfectant technology is characterized by comprising the following requested materials: (1) 10 to 13% of didecyldimethylammonium chloride, (2) 23 to 25% of laurylamine dipropylenediamine, a chelating agent, a stabilizer, and a pH conditioning agent. Highly concentrated liquid of the invention can be directly mixed with deionized water in proportion to produce military, medical and civil sanitation disinfectants, or used in the fields of industry, agriculture, forestry, animal husbandry and the like. The preparation is simple and the cost is low. Under war and natural disasters and other special circumstances, clean water can be directly taken as a solvent to blend, the anti-hard water capacity will not affect the sterilizing effect, the drawbacks of inflammability and failure caused by volatilization of the current disinfectants are overcome, high barrier bottles are used for storage according to the anionic and cationic surface active agent compound disinfectant technology, so preservation time can be up to 5 years or above, and the highly concentrated liquid has the characteristics of being colorless, tasteless, free from stained yellow, free from color fade, free from washing, easy to transport and use and the like.

The invention relates to the technical field of electric power system operation and control technology and provides an electric power system state estimation method taking into account new energy time-space relevance. The method includes steps of 1, reading power grid information data; 2, performing system metering and configuration; 3, performing modeling based on time-space relevance according to new energy system state; 4, performing estimation on Phi 1 and Sk by adopting M groups of history state data; 5, performing state predication of k moment according to estimation values as in the description; 6, performing predication auxiliary state estimation; 7, sending a state estimation result of the k moment to a power grid control center. According to the invention, a defect that static state estimation cannot meet needs for randomness and volatility of new energy grid connection is made up and real time, effective and accurate state estimation on new energy grid connection is realized. Short time state predication accuracy is improved, final state estimation accuracy is improved, and dynamic feature of a power grid are reflected fully. Data support is provided for high level application related to the power system control center.

The invention discloses a multi-target flexible job shop energy-saving scheduling method based on an improved grey wolf algorithm. The method comprises the following steps: firstly, constructing a flexible job shop energy-saving scheduling problem model; two-segment coding based on natural numbers is adopted; discretizing a continuity problem by adopting a mode based on an LOV rule; introducing an aggregation rate among individuals to obtain an initial population with relatively high quality; evaluating individuals in the initial population, determining an alpha wolf set, a beta wolf set and a delta wolf set of individuals of a decision-making layer according to a proportion, and adding a non-dominated solution into an external file; a dual-mode parallel search mode is used, tracking and searching capabilities are dynamically adjusted in the search process, improved tracking operation is introduced to improve the problem solving precision, variable domain search is adopted in the search mode, the evolution speed is improved, and a local optimal solution is broken through. According to the method, the machining sequence of the workpieces on the machines is reasonably arranged, and a better scheduling scheme is provided for a production enterprise from the three aspects of minimizing the maximum completion time, the total delay duration and the total energy consumption of the system.

The invention relates to a continuous air pressure sintering method for a copper-based composite material friction block, and belongs to the field of train braking systems. The copper-based composite material friction block is composed of copper powder, ferrous powder, flake graphite, molybdenum disulfide, aluminum oxide and chromite. All components are mixed uniformly and formed by cold-pressing; and then blanks are sintered by using continuous sintering equipment. In the sintering process, air pressure sintering is employed; a gas pressure in a furnace chamber is 0.5-3 MPa; and the gas is formed by mixing hydrogen and nitrogen. The continuous air pressure sintering method overcomes fluctuation and difference of sample performance among batches caused by conventional intermittent sintering with a bell type furnace or a hot-pressing furnace, prevents energy consumption of repeatedly heating and cooling among the bathes in the intermittent sintering. A prepared material has density uniformity and structure continuity in all directions, and is beneficial to stabilize friction performance and absorb sound and reduce noise. The performance of a product obtained by the continuous air pressure sintering method is superior to that of a product obtained by the conventional sintering method. The continuous air pressure sintering method is low in production cost and high in production efficiency and can realize large-scale production easily.

The invention discloses a harmonic detection method and detection system based on frequency shift ensemble empirical mode decomposition. According to the method, signals are converted by employing Hilbert transform, conditions of ensemble empirical mode decomposition are satisfied through frequency shift, and the problem of higher harmonic separation is solved. According to the method, the problem of intermittent signal interference in a harmonic detection environment can be overcome, and the application range can be extended; the problem that higher harmonics cannot be completely separated due to similar frequencies is effectively solved, and various kinds of information of the signals on a time frequency plane can be accurately expressed; the system employs an industrial personal computer and a DSP as core devices; the industrial personal computer is regarded as a host, detection of a complex algorithm is realized, the effect thereof is verified, and acquisition of harmonic signals is realized by employing a data acquisition card; and the DSP is regarded as a slave and used for verifying the practicality of the complex algorithm, a phase-locked loop circuit is employed, the power grid frequency fluctuation influence is overcome, the voltage frequency of the power grid can be accurately detected, and the precision of harmonic detection is improved.

A high-temperature resistant wax anticorrosion material is disclosed. The anticorrosion material is prepared from, by mass, 3-70% of polyethylene wax, 5-20% of polytetrafluoroethylene modified polyethylene wax, 0.5-4.5% of 2,6-bis(1,1-dimethylethyl)-4-methylphenol, 5-25% of white oil, 2-3% of petroleum sodium sulfonate, 1.5-10% of fumed silica, and 0.1-0.5% of polysiloxane. The anticorrosion material can overcome the problem that other flexible anticorrosion materials cannot resist high temperatures, and overcomes a problem that petrolatum type anticorrosion materials are prone to component loss and volatilization. The process and operation are simple. The anticorrosion material is prone to industrial production.

The invention relates to an ink-jet printing method which comprises the following steps: judging whether the tail end (in the transmission direction) of a printing medium transmitted in the transmission direction passes a tail detection sensor, and detecting the current position of the tail end (in the transmission direction) of the printing medium transmitted in the transmission direction; and correcting the current position of the tail end into the correction position of the tail end, wherein in the process of detection, whether the printing medium is transmitted or in a state of rest is judged under the condition that the current position of the tail end is detected; and the correction contains an operation of correcting the current position of the tail end as the correction position of the tail end under the condition of judging that the printing medium is transmitted in the process of judging. According to the invention, through detecting the tail end of printing paper and cutting images according to the tail end of the printing paper, the situation that inks are adhered to tapes can be prevented; and in addition, through making the stroke influence quantity of a stuffer variable, the individual difference such as sensor fluctuation and assembling fluctuation can be overcome.

The invention relates to an ink-jet printing device comprising a transmission unit, a tail end detection unit, a correction unit, a generation unit, an accumulation unit, an identification unit and a second calculation unit, wherein the transmission unit is used for transmitting a recording medium; the tail end detection unit is used for detecting a current position of a tail end in the transmission direction of the recording medium transmitted by the transmission unit; the correction unit is used for correcting the current position of the tail end into a tail-end correction position; the generation unit is used for generating a layout of images to be recorded; the accumulation unit is used for accumulating transmission capacity of the recording medium transmitted by the transmission unit during intermittent drive; the identification unit is used for identifying information of the recording medium; and the second calculation unit is used for calculating a calculation position of the tail end on the basis of the transmission capacity accumulated by the accumulation unit and the recording medium information identified by the identification unit. Through the ink-jet printing device disclosed by the invention, images are cut by detecting the tail end of printing paper according to the tail end of the printing paper, thus ink can be prevented from being attached on a belt; in addition, individual difference, such as sensor fluctuation and installation fluctuation can be overcome by working out the quantity influenced by the variable stroke of a filler.

The invention discloses a stable high-pressure medical pump. The stable high-pressure medical pump comprises a pump body, a liquid inlet pipe and a liquid outlet pipe; a first piston cylinder and a second piston cylinder are arranged in the pump body; a first liquid inlet channel and a first liquid discharge channel communicates with an inner cavity of the first piston cylinder; a second liquid inlet channel and a second liquid discharge channel communicates with an inner cavity of the second piston cylinder; the liquid inlet pipe is respectively connected with the first liquid inlet channel and the second liquid inlet channel, and is provided with one-way valves on the first liquid inlet channel and the second liquid inlet channel; a switching valve is arranged on the pump body; the liquid outlet pipe can communicate with the first liquid discharge channel or the second liquid discharge channel through the switching valve; and pistons and piston rods are respectively mounted in the first piston cylinder and the second piston cylinder. The stable high-pressure medical pump comprises two piston cylinders, uses an asynchronous continuous pressing mode of double pistons to realize reciprocating motions of the double pistons, matches with the one-way valves and the switching valve to realize no-gap continuous high pressure, overcomes the fluctuation problem of a water jet scalpel, and keeps excellent cutting performance of the water jet scalpel under constant pressure.

The invention relates to a composite fiber of spices and a preparation method and application of the composite fiber. The composite fiber of the spices is in a skin-core structure and comprises a hollow fiber as a skin layer and a core layer in a hollow cavity of the hollow fiber; and the core layer comprises a core layer base material and the spices dispersed in the core layer base material. The preparation method comprises the following steps: preparing a perfusion fluid from the spices and the core layer base material; injecting the perfusion fluid into the hollow cavity of the hollow fiber; and then carrying out solidification to form the core layer. The method provided by the invention can achieve recombination of various spices and fibers; the spice content in the composite fiber of the spices is relatively high; and the functional effect is relatively good.

The invention relates to a polymer photoinitiator and a preparation method thereof, the method being a first method of carrying out condensation polymerization on 4,4'-dihydroxy benzophenone and dihalogenated hydrocarbon which are used as raw materials to prepare the polymer photoinitiator; a second method of firstly carrying out acetylation on 4,4'-dihydroxy benzophenone, and then carrying out melt polycondensation reaction with diacid to prepare the polymer photoinitiator; a third method of carrying out polymerization reaction on 4,4'-dihydroxy benzophenone and diisocyanate to prepare the polymer photoinitiator. The structural formula of the prepared high-molecular photoinitiator is shown in the specification, wherein n is an integer greater than or equal to 2; R1 is a cC1-C20 alkylene group, or R2 is a C1-C18 alkylene group; and R3 is a C4-C20 alkylene group. The preparation method disclosed by the invention is simple in process and has a wide application prospect in the field of engineering plastic processing; the prepared polymer photoinitiator is good in thermal stability and excellent in photo-initiation effect, and the problems of volatilization and migration of photo-initiation residues during photolysis of an existing photoinitiator can be solved as an initiation group is located in a main chain.

The invention discloses a high-gain broadband millimeter-wave differential amplifier. The differential amplifier includes: an input broadband balun, an input matching network, a four-stage differential cascode amplifier, an interstage matching network, an output matching network, and an output broadband balun. It solves the problem of low gain of the millimeter-wave amplifier, and at the same time solves the technical problem that the traditional broadband amplifier adopts the form of feedback to reduce the gain, and realizes the technical effect of high-gain and wide-bandwidth of the millimeter-wave differential amplifier.

The invention discloses a preparation method of rigid polyurethane foam, relates to the field of polyurethane industry, and particularly relates to a preparation method of rigid polyurethane foam. The preparation method comprises the following steps of the preparation of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate: mixing 1-methylimidazole, n-butyl bromide and potassium tetrafluoroborate, adding an obtained first mixture into a 100mL of flask, agitating the first mixture, making the first mixture react for 3h to 3.5h at a constant temperature of 80 DEG C, cooling an obtained second mixture to a room temperature, diluting the second mixture by using acetonitrile, depositing an obtained third mixture by using potassium bromide, filtering an obtained fourth mixture, moving filtrate into a rotary evaporator, pressurizing the filtrate to remove the acetonitrile, and carrying out vacuum drying for 8h at 80 to 85 DEG C; the preparation of ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate: under the protection of nitrogen, dropwise adding n-butyl bromide into 1-methylimidazole, and agitating an obtained fifth mixture. According to the preparation method, the high heat stability of the ionic liquid is utilized; the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate and 1-butyl-3-methylimidazolium hexafluorophosphate is prepared, and is applied to polyurethane rigid foam as flame retardants. Not only are the defects that a phosphorus flame retardant is high in volatility and relatively low in heat resistance overcome, but also the defect that a halogen flame retardant is large in fuming amount is overcome.

The invention provides a coating material, a coated controlled-release pesticide fertilizer, a preparation method and application thereof. The coating material mainly consists of a coating material Aand a coating material B; the coating material A is composed of plant polyol, a film-forming assistant, an organic metal compound catalyst and a pore-forming agent; and the coating material B is polyisocyanate. The components selected by the invention are environmental-friendly materials, and the preparation process of the coated pesticide fertilizer is free of solvent volatilization and possibleenvironmental pollution problems. The coating material can form a film through in-situ polymerization reaction at 50-60DEG C, thus ensuring preparation of the coated controlled-release pesticide fertilizer without pesticide decomposition; in addition, through the combination of fertilizer and pesticide, the added value of the coated controlled-release pesticide fertilizer is increased; the pesticide fertilizer can be dried and coated at low temperature after granulation, thus avoiding the reduction or failure of pesticide efficacy caused by decomposition of the effective components of pesticide; and the coated controlled-release pesticide fertilizer provided by the invention has the characteristics of complete coating and good controlled release performance, and the pesticide release ratemakes the application prospects of the controlled-release pesticide fertilizer wider.

The invention discloses a monthly power demand prediction method based on VMD-ANFIS-ARIMA, which solves the defects in the prior art, and comprises the following steps: 1, obtaining monthly power consumption sequence data, and determining the number of VMFs of VMD components; 2, taking the screened influence factors as independent variables, taking trend terms in the VMF as dependent variables, and using an ANFIS model to perform prediction; 3, carrying out sequence stability test on the VMF except the trend term, and determining the order of AR and MA according to the correlation coefficient and the partial autocorrelation coefficient of the VMF; 4, using an ARIMA model to carry out time sequence prediction on the VMFs except the trend term; and 5, performing linear reconstruction on each VMD component prediction result to obtain a final power consumption demand prediction result.

The invention provides an anti-diffusion layer, a preparation method of the layer, a TFT (thin film transistor), an array substrate and a display device, which belong to the technical field of display device preparation and can solve a problem that a grid is volatilized so the performances of a display device are influenced, caused by higher environment temperature required by the preparation of a tantalum dioxide anti-diffusion layer by utilizing PVD (physical vapor deposition) or CVD (chemical vapor deposition) in the prior art. The preparation method of the anti-diffusion layer comprises the following steps of putting a conductive substrate and a cathode in a tantalum sulfate solution, electrifying by taking the conductive substrate as an anode to form the tantalum dioxide anti-diffusion layer on the conductive substrate. The prepared tantalum dioxide anti-diffusion layer can be applied to the preparation of the grid of the TFT.

The invention relates to the technical field of electric power system operation and control technology and provides an electric power system state estimation method taking into account new energy time-space relevance. The method includes steps of 1, reading power grid information data; 2, performing system metering and configuration; 3, performing modeling based on time-space relevance according to new energy system state; 4, performing estimation on Phi 1 and Sk by adopting M groups of history state data; 5, performing state predication of k moment according to estimation values as in the description; 6, performing predication auxiliary state estimation; 7, sending a state estimation result of the k moment to a power grid control center. According to the invention, a defect that static state estimation cannot meet needs for randomness and volatility of new energy grid connection is made up and real time, effective and accurate state estimation on new energy grid connection is realized. Short time state predication accuracy is improved, final state estimation accuracy is improved, and dynamic feature of a power grid are reflected fully. Data support is provided for high level application related to the power system control center.

The invention discloses a CO2 zero-emission production process and system for calcining limestone by using solar energy, and the specific process is as follows: solar energy is reflected to a heat collection and energy storage device through a mirror field, the heat collection and energy storage device focuses and stores energy, the collected kiln tail waste gas containing high-concentration CO2 gas is heated to 900-1200 DEG C, and is conveyed into a decomposing furnace for calcining and decomposing limestone, and then the limestone is calcined and decomposed. After high-concentration CO2 waste gas generated by limestone decomposition in the decomposition furnace enters a preheater system to preheat limestone, the high-concentration CO2 waste gas returns to the heat collection energy storage device; and the decomposed calcium oxide is cooled to 80-100 DEG C through a cyclone cooler in an independent cold air supply mode. According to the invention, low-energy-consumption, low-pollution and low-emission solar clean energy is used for replacing high-energy-consumption, high-pollution and high-emission traditional energy such as coal, petroleum and the like, and zero emission of CO2 is realized.