137 results about "Hysteresis phenomenon" patented technology

The invention discloses a method and a device for automatically clearing background application programs. The method comprises the following steps that: the residual electricity quantity of a mobile terminal battery, the number of background running application programs and the preset reference retention application program number value are obtained in real time; when the reference retention application program number value is obtained, and the residual electricity quantity is greater than the preset low-electricity electricity quantity but not equal to the reference residual electricity quantity, the target upper limit value of the allowed background running application program number corresponding to the residual electricity quantity is obtained according to the residual electricity quantity and the reference retention application program number value; and the background running application programs are cleared according to preset clearing rules, so that the background running application program number is smaller than or equal to the target upper limit value. The background running application programs can be cleared in real time according to the residual electricity quantity of the mobile terminal battery, so that compared with the prior art, the method and the device have the advantages that the occurrence of clamping and hysteresis phenomena can be prevented, and the problem of great battery electricity consumption is effectively solved.

The invention provides a method for preparing a perovskite solar cell on the basis of a two-dimensional material graphene-phase carbon nitride. The graphene-phase carbon nitride is doped into a perovskite precursor solution to prepare the perovskite solar cell. The method has the following advantages that (1) the raw material required for synthesis of the material is low in cost, and the product is small in toxicity; (2) solvent volatilization during the annealing process is effectively slowed down, so that a perovskite thin film crystal is more uniform and compact; (3) the grain crystal sizeof a perovskite layer is increased, a crystal boundary easy to combine with charge is effectively reduced, and the filling factor of a device is improved; (4) a surface of the perovskite thin film ispassivated, and the hysteresis phenomenon of the device is effectively improved; and (5) the conductivity of the surface of the perovskite thin film is improved, the contact resistance of the interface is reduced, and the short-circuit current of the device is increased. The preparation process is simple and convenient and is low in preparation difficulty; by doping of the graphene-phase carbon nitride, the smoothness and the uniformity of the perovskite thin film can be effectively improved; and by a series of gradient doping, the device performance is remarkably changed.

The invention belongs to the technical field of a cathode material for a lithium primary battery, particularly relates to the field of preparation of the cathode material for a fluorocarbon battery, and in particular to a composite carbon fluoride cathode material for the lithium primary battery, a preparation method and an application thereof. The material is a composite material prepared by ballmilling and mixing a porous carbon fluoride material having a high tap density and a carbon fluoride material having a high graphitization degree and then fluorinating the mixture. The composite material has a carbon content of 38-60%, a fluorine content of 40-62% and a tap density of greater than 0.8g/ml; the mixing mass ratio is in the range of 1:0.1-1:10; and the composite material has high specific surface area, high tap density and high graphitization degree. Due to the high tap density of the material, the overall high volumetric specific energy of the material is guaranteed; through anion diffusion channel composed of porous carbon fluorides, the voltage hysteresis phenomenon at the initial stage of the battery discharge is effectively improved and the overall discharge performance of the material is improved.

The invention discloses a multi-target tracking method for a PHD smoother adaptive to the target nascent strength. According to the invention, the target confirmation hysteresis phenomenon of the PHD smoother adaptive to the target nascent strength at the target nascent time in the clutter environment is mainly solved. Meanwhile, the implementation form of the PHD smoother in the Linear gaussian condition is provided. Through the forward filtering process and the backward smoothing process, the number of targets and the states of the targets are accurately estimated. The influence of the target confirmation hysteresis phenomenon on the track formation at the target nascent time is relieved. The method comprises the steps of target nascent rate estimation, forward filtering and backward smoothing. That means, firstly, the nascent rate of targets at the moment k is estimated according to the mean value of the number of transcendental clutters. Secondly, the targets are predicted and updated to realize the forward filtering based on the measurement value at the moment k. Thirdly, the backward smoothing is conducted on the filtering result based on the time hysteresis L. Finally, a tracking result is outputted through the clipping, combining and state extracting process.

The invention discloses a traffic flow microscopic simulation method based on car following behavior, which adopts a novel cellular automaton model to perform traffic flow microscopic simulation, and comprises the following steps: 1) start setting; 2) beginning to update from the first updating car a; 3) updating the state of the car i; 4) updating the front driving space of the car at the back; 5) acquiring simulation data; and 6) judging the simulation ending conditions. The model adopted by the method adopts a small cellular size; the car characteristics and the driving behavior can be finely adjusted according to the adjusting parameters, so as to facilitate the traffic flow simulations under different conditions. The simulated flow of the model is well matched with the actual measured data, and can describe the meta-stable state and the hysteresis phenomenon of the traffic system.

The invention relates to the field of solar cells, and provides a manufacturing method of a methylamine lead iodine perovskite solar cell. A photosensitive layer is a methylamine lead iodine perovskite film. The methylamine lead iodine perovskite film is manufactured by the spin coating technology and the anti-solvent dropping and cleaning technology with combination of the solvent annealing technology. The spin coating technology refers to the process that a methylamine lead iodine perovskite CH3NH3PbI3 precursor solution is spin-coated on a PEDOT:PSS film. The anti-solvent cleaning technology refers to the process that the anti-solvent amyl alcohol is dropped in the process of spin-coating the CH3NH3PbI3 methylamine lead iodine perovskite precursor solution so that the perovskite is enabled to be quickly crystalized and precipitated, wherein the anti-solvent amyl alcohol is sec-amyl alcohol or tertiary amyl alcohol. The adopted preparation technology is simple so that the methylamine lead iodine perovskite solar cell of high efficiency and great repeatability without the hysteresis phenomenon can be prepared.

The invention relates to a sectional cooling control method for an emulsion of a working roller of a single-frame rolling mill. Particularly, a fuzzy modeling method is used for establishing a quantitative relation among a plate-shape deviation, a previous regulating quantity of injected flow of the emulsion and a present regulating quantity of the injected flow of the emulsion, thereby realizinghigh-precision sectional cooling control of the emulsion of the working roller of the single-frame rolling mill. The method provided by the invention overcomes the technical problem that precise control cannot be realized because a long-time hysteresis phenomenon exists in an emulsion injecting cooling action mechanism; high-precision sectional cooling control of the emulsion of the working roller of the single-frame rolling mill is realized, thereby efficiently eliminating high plate-shape deviation of cold-rolling strip steel and promoting the quality of the plate shape of a cold-rolling strip steel product; the method is simple and practicable, fully meets a real-time demand of a sectional cooling control system and is characterized by effectiveness and practicability; and a firm foundation is established for high-precision plate-shape control of the cold-rolling strip steel.

The invention provides a nonaqueous electrolyte, which comprises an organic solvent and a lithium salt, wherein the organic solvent is selected from a non-carbonate solvent. The provided nonaqueous electrolyte has relatively good nucleophilic attack resistance; high-activity radical ions O2.<-> and these solvents are not easily subjected to nucleophilic reaction, so that Li2O loss in the material is effectively inhibited; the structure of a lithium-rich cathode material is stabilized; and the voltage hysteresis phenomenon of the material is effectively relieved. Meanwhile, the provided nonaqueous electrolyte has good oxidation resistance and non-combustible characteristics, so that a lithium-rich battery prepared from the nonaqueous electrolyte has relatively good cycle performance and relatively high safety.

The invention discloses a clutch gearbox solenoid valve characteristic curve correction method and system. The method comprises the steps of acquiring the solenoid valve hysteresis compensation valueof the clutch pressure by conducting compensation on solenoid valve hysteresis; conducting summation on the solenoid valve characteristic curve original value, the solenoid valve characteristic curvelearning compensation value and the solenoid valve hysteresis compensation value to obtain the final solenoid valve characteristic curve corrected value of the clutch pressure; and controlling the pressure of a solenoid valve and a clutch according to the corrected value. The influence of the hysteresis phenomenon on the clutch pressure is reduced. Accordingly, the control precision of the clutchpressure is improved, the control precision of a gearbox is improved, and the drivability of a whole car is guaranteed.

The invention discloses a transmission method for quickly previewing an H.264 coded picture. A video stream is sampled and coded to generate the coded picture. The coded picture comprises a plurality of I pictures and a plurality of P pictures corresponding to the I pictures, wherein the I pictures are preferably generated and transmitted, and the data of each I picture is transmitted at a fixed time interval T until the data of all the I pictures of the video stream is transmitted; the P pictures are transmitted in a time bucket with an idle network bandwidth between the transmission of every two I pictures; and a large coded picture is divided into a plurality of data packets for transmission. The hysteresis phenomenon of the transmission of the I pictures is avoided, the real-time performance of the transmission of the I pictures is ensured, and a client can most quickly generate a preview picture.

The invention relates to a method for detecting hydrophobic nature of a composite insulator based on dynamic contact angles. The method is characterized by comprising steps of photographing a contact angle meter at the position perpendicular to a plane where an umbrella skirt or a protecting bush is located through a digital camera or a camera lens, an industrial camera and an image acquisition card to obtain a water drop image, continuously shooting through injection of deionized water to obtain a series of water drop images, calculating out an advance angle theta A through a survey meter, then continuously shooting through extraction of water drops to obtain a series of water drop images, and calculating out an advance angle theta R through the survey meter. The method for detecting the hydrophobic nature of the composite insulator based on the dynamic contact angles has the advantages of (1) high calculating accuracy which represents that influences of roughness of the surface of a material and solute settling on the surface can be restrained to some extent, and an receding angle can better reflect the hydrophobic nature of the surface of the material particularly; and (2) high calculating stability which represents that fluctuations among a plurality of measurement results are small, and calculating stability is high due to the fact that the influence of hysteresis phenomena on measurement of the contact angles are restrained.

To provide a developing device capable of preventing the hysteresis phenomenon. The developer of the developing device contains a toner and a carrier. The toner and the carrier are charged to a polarity different from each other by frictional contact thereof. The developing device has a first conveyance member and a second conveyance member which faces an electrostatic latent image bearing body via the second region. An electric field forming device forms a first electric field between the first conveyance member and the second conveyance member to move the toner in the developer retained by the first conveyance member to the second conveyance member, and forms a second electric field between the second conveyance member and the electrostatic latent image bearing body to move the toner retained by the second conveyance member to an electrostatic latent image of the electrostatic latent image bearing body. The first electric field is an oscillating electric field having both a function to supply the toner to the second conveyance member and a function to collect the toner from the second conveyance member while a time average field strength is biased to a side where the toner is supplied from the first conveyance member to the second conveyance member, and a time ratio for carrying out the function to collect the toner from the second conveyance member to the first conveyance member is 60 to 80%.

The invention relates to a piezoelectric ceramic driving power supply with a hysteresis compensation function, which comprises a DC voltage stabilization module, a hysteresis compensation module, a power amplification module and a displacement detection module, wherein the DC voltage stabilization module provides DC voltage for the power amplification module and the hysteresis compensation module; the hysteresis compensation module is used for compensating hysteresis nonlinearity of the piezoelectric ceramic, a switch is arranged between the input end and the output end of the hysteresis compensation module, the switch is closed in the case of first-time use or when a piezoelectric ceramic chip of a different type is replaced, and the hysteresis compensation module is short-circuited; the power amplification module carries out voltage and power amplification on output signals of the hysteresis compensation module; and the displacement detection module is started only in the case of first-time measurement or a piezoelectric ceramic chip of a different type is replaced and is used for measuring response displacement and storing the response displacement to the hysteresis compensation module. The hysteresis compensation module is introduced, the influence on the control precision by a hysteresis phenomenon can be greatly reduced, and the structure is simple, and the stability is high.

The invention discloses an automatic control system for compaction density of a pole piece. According to the system, the coated pole piece passes through a rolling production line, production is controlled by a rolling production line control system, the surface density of the pole piece is detected by a double-face penetration type beta sensor, the thickness is detected by a double-face laser sensor, detection data is transmitted to the rolling production line control system via a data transmission network, the pole pipe is rolled through rolling rollers, a servo control system is installed on the rolling rollers for controlling the roller gaps, and a position detection sensor is installed on the rolling rollers for detecting the actual roller gap. The automatic control system for compaction density of the pole piece is simple in structure and reasonable in design, reduces artificial intervention on regulating of pole-piece rolling degree, and realizes automatic regulation, reduces the regulation hysteresis phenomena on pole-piece thickness and compaction density during production, realizes automatic stable controlling on compaction density during rolling of the pole piece, and is relatively intelligent. A novel rolling method for the pole piece is provided, and the control manner on pole-piece rolling production is expanded.

The invention relates to humidity-sensitive sensing films and discloses a preparation method of the humidity-sensitive sensing film. The preparation method comprises the following steps: taking valeryl chloride as a modifier; carrying out modification treatment on cellulose in an ionic liquid solution, i.e., 1-ethyl-3-methyl-methylimidazole acetate, so as to prepare water-soluble cellulose acetateWSCA; preparing the water-soluble cellulose acetate to a cellulose water solution; preparing graphene oxide into a solution and adding the solution into the cellulose water solution, so as to obtaina cellulose/graphene oxide uniform mixed solution; adding a reduction reagent into the cellulose/graphene oxide mixed solution and treating an obtained reduced graphene oxide/cellulose water solutionto obtain a flexible rGO/WSCA humidity-sensitive sensing film. The humidity-sensitive film provided by the invention has the advantages of uneasiness of falling off, no hysteresis phenomenon, relatively good humidity sensitivity, environment-friendly material and the like.

The invention discloses a message reminding method and device. The method comprises the following steps: detecting whether a terminal is in a visitor user mode while receiving data information; if the terminal is in the visitor user mode, detecting whether the received data information contains key information matched with the information in a database; if detecting that the data information contains the key information matched with database, generating prompt information corresponding to the data information. In the embodiment of the invention, when the terminal is in the visitor user mode, the device can automatically detect whether the received data information contains the key information, and sends the corresponding prompt information if the received data information contains the key information, thereby reducing the hysteresis phenomenon of important information and avoiding unnecessary loss for the user.

The invention discloses a film coiling system of a heat transfer machine. A film coiling carrying shaft, a film coiling roller, a film pressing wheel and a film reeling wheel shaft are stopped and positioned on a machine frame in the axial direction in a rotatable way, a photoelectric switch, a steering shaft group and a step motor are fixedly arranged on the machine frame, the photoelectric switch can sense optical markers on a transfer printing film, the outer wall of the film pressing wheel in the radial direction is tightly butted against the outer side wall of the film coiling roller in the radial direction, the motive power output end of the step motor drives the film coiling roller and the film reeling wheel shaft to rotate in the same direction at the same speed, the photoelectricswitch transfers sensing signals to a programmable logic controller, the programmable logic controller controls the starting and the stopping of the step motor, and a transfer printing film tensioning device makes the transfer printing film maintain the tensioning state. The invention uses the programmable logic controller for controlling the step motor to drive the film coiling roller, the starting and the stopping of the step motor are in pure electric control without mechanical friction and hysteresis phenomena, so the operation speed is stable, the reliability is high, the service life islong, the maintenance is not needed, the transfer printing film always maintains the tensioning state, and the positioning of the photoelectric switch is precise.

An electro-wetting display panel is provided. The electro-wetting display panel comprises a first transparent substrate, a second transparent substrate, and pixel units. The pixel units comprise first electrodes, a first hydrophobic layer, a plurality of first barriers, a second electrode, a polarized liquid and a plurality of first non-polarized liquids. The hysteresis phenomenon of the non-polarized liquids can be prevented by using the recess areas on the hydrophobic layer.

The invention discloses an automatic coating control method and an automatic coating control system. The automatic coating control system comprises a coating production line control system, a data transmission network, a coating steel roller, a double-faced penetration-type beta sensor, a coating cavity, a pressure detection sensor, a feeding tank, a feeding pump, a feeding pipeline, a coating production line and a drying box, wherein a battery pole piece is allowed to pass through a coating production line; the coating production line control system is used for controlling production; the battery pole piece is produced through the coating cavity, the coating steel roller and the drying box; the pressure detection sensor is mounted on the coating cavity; after the double-faced penetration-type beta sensor is mounted on the drying box, detected data are transmitted to the coating production line control system through the data transmission network; the feeding tank is used for feeding slurry to the coating cavity through the feeding pump and the feeding pipeline. The automatic coating control system is simple in structure and reasonable in design, manual intervention to adjustment of the slurry feeding amount in the coating process is reduced, automatic regulation is achieved, and the hysteresis phenomenon of surface density adjustment in the coating process is reduced.

The invention discloses a method and a device for eliminating thermal inertia of a hot air drier. The method comprises the steps of arranging a proportional valve for adjusting smoke amount and hot air amount in a smoke channel connected with a heat exchanger, respectively measuring an inlet smoke temperature Ty1 and an outlet smoke temperature Ty2 of the heat exchanger, a hot air inlet temperature Tf1 of the drier and an external environment temperature Tf0 respectively by a temperature sensor, taking a smoke and hot air ratio as the matching principle of drying heat energy, and realizing the principle by controlling the opening degree of the proportional valve, so the temperature of the drying hot air is automatically matched and the thermal inertia of the hot air drier is eliminated. The device and method can be used in real time under complex ambient environment of drying equipment, the serious large hysteresis phenomenon in high inertia, multi-variable and nonlinear process operation in a hot air drying process is solved, the seed quality is guaranteed, the drying temperature is controlled, the thermal inertia in drying process is eliminated, and meanwhile, the method and device are beneficial for an efficient and energy-saving drying process.

A method of forming a thin film of the present invention comprises: an optical characteristic adjusting step of repeatedly conveying a substrate holder between a zone to perform an intermediate thin film forming step and a zone to perform a film composition converting step while controlling a conveying speed of the substrate holder for holding a substrate, and adjusting a film composition of a finally formed thin film to form the thin film having an optical characteristic value of a region where a hysteresis phenomenon occurs.

The invention discloses a nonlinear system dynamic surface implicit inverse controller with unknown saturated PI hysteresis. The nonlinear system dynamic surface implicit inverse controller comprisesthe following steps: 1) constructing a nonlinear system model with saturated PI hysteresis; 2) modeling a saturated PI model in the system; 3) defining an error performance conversion function with asaturated PI hysteresis nonlinear system to ensure that the tracking error of the system meets a predetermined performance index; and 4) combining an adaptive dynamic surface algorithm with an implicit inverse method to design a controller with a saturated hysteresis strict feedback nonlinear system. According to the controller, it can be ensured that the system tracking error meets the preset performance index, the problem that a hysteresis inverse model is difficult to construct is solved, the influence of the hysteresis phenomenon in the system is effectively solved, the system tracking error meets the L-infinity performance index, and stable operation of the system is achieved.