188 results about "Electric charge" patented technology

The invention relates to the technical field of electromagnetic environment influence prediction, and particularly discloses an alternating current transmission line electromagnetic environment influence prediction and evaluation method. The method comprises the following steps: constructing a spatial region model; modeling and predicting the electric field intensity based on the spatial region model; based on the spatial region model, modeling and predicting magnetic induction intensity; determining a plurality of basic typical working conditions, and performing electromagnetic influence classification prediction; performing limit value comparison and space risk evaluation on the electric field distribution prediction data, the magnetic induction distribution prediction data and the classification prediction data; and carrying out prediction centralized induction and report output. According to the method, the phase balance charge distribution network is established, the mirror image charge is dynamically calibrated by combining actual measurement data of the ground sensor, and the adaptive charge safety envelope line is generated based on the road section type, so that the problem of electric field prediction deviation caused by neglecting space phase difference in the prior art is solved.

The invention provides a space particulate matter concentration detection method and device in an industrial and mining environment, relates to the technical field of industrial and mining environment detection, and solves the technical problem of low detection accuracy in the prior art. The method comprises the following steps: sensing a charge signal of the suspended particulate matter through a charge acquisition probe; the charge acquisition probe is used for generating induction current according to electrostatic induction charge characteristics of the suspended particulate matters; carrying out amplification processing and noise processing on the charge signal, and adopting a differential signal processing mechanism to eliminate environmental noise in the noise processing; the processed charge signals are input into a particulate matter characteristic model, and the spatial particulate matter concentration is obtained through calculation; the particulate matter characteristic model is used for representing an association relationship between electrostatic induction charge characteristics and concentrations of particulate matters with different particle sizes. The method is used in the detection process of the space particulate matter concentration.

Systems and methods described herein provide for charge state control of multiply-charged anions in a front end, high pressure ion guide. In some example aspects, a mass spectrometer system is provided comprising a first vacuum chamber (121) maintained at a pressure above about 500 mTorr. At least one ion guide (106) is disposed within the first vacuum chamber, the at least one ion guide comprising a plurality of rods extending along a central longitudinal axis. A controller (193) is configured to adjust an amplitude of an RF voltage signal provided to the plurality of rods so as to alternatively operate the ion guide in a first mode of operation with a lower amplitude of the RF voltage signal so as to reduce the likelihood of charge reduction by electron detachment so as to substantially maintain the isotopic distribution of the ions during transmission of ions through the ion guide, and a second mode of operation with a higher amplitude of the RF voltage signal so as to increase the likelihood of electron detachment from ions being transmitted therethrough.

The invention relates to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. The electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer of a single-layer type disposed on the conductive substrate. The photosensitive layer has an absorption coefficient of 0.008 or less at a wavelength of 1000 nm and contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The charge generating material is at least one selected from a hydroxygallium phthalocyanine pigment and a chlorogallium phthalocyanine pigment and is contained in an amount of 0.9% by weight or more and 1.8% by weight or less relative to the binder resin.

Methods and systems for identifying or classifying charge states of detected ions. An example method for classifying a charge state of detected ions may include generating a pulse for each ion in a plurality of ions detected by a detector, wherein each pulse has a pulse characteristic; generating a pulse-characteristic distribution of the generated pulses; and based on the pulse-characteristic distribution, generating an identification of the charge state of one or more ions in the plurality of ions.

A particle acceleration and extraction system includes a cyclotron having a stripping assembly and a target. The cyclotron includes an acceleration chamber and is operable to generate a magnetic field and an electric field in the acceleration chamber such that charged particles in the acceleration chamber are accelerated along a spiral path extending outward and at increasing energies from an initial energy E1 to a final energy E2, E2 being greater than E1. The target defines a target location outside of the acceleration chamber. The stripping assembly is positioned in the acceleration chamber and is operable to extract a charge from the charged particles at an intermediate location of the outward spiral path whereby the post-stripping assembly particles are directed towards the target location. The charged particles have an intermediate energy E3 at the intermediate location that is between E1 and E2.

The invention discloses a method for predicting electrostatic potential in a storage tank in oil collection operation of a storage tank, and the method comprises the following steps: initializing and constructing a knowledge respectively establishing a multipath leakage equivalent circuit model library for a fixed roof tank and an inner floating roof tank, the initial fitting impulse current calculation coefficient range, the optimization constraint condition and the conductivity-temperature relation function library are stored; real-time prediction and monitoring: acquiring multi-dimensional data in real time, preprocessing, dynamically calibrating charge generation items, and calculating charge balance by combining a multi-path leakage model and capacitance correction; meanwhile, a high-frequency flow meter is used for detecting the sudden change of the flow speed to trigger an LSTM transient compensation model to predict the transient electrostatic potential variable quantity, and the transient electrostatic potential variable quantity is superposed on a physical model predicted value result to obtain a final electrostatic potential predicted value; dynamic risk assessment and early warning: triggering different levels of early warning according to an assessment result; and deep analysis of abnormal working conditions: when the abnormal working conditions occur, automatically starting local CFD micro-simulation driven by edge calculation to verify local charge aggregation and electric field distortion conditions.

The invention relates to the technical field of partial discharge processing, and discloses a partial discharge processing method and system based on electric field analysis, and the method comprises the steps: synchronously collecting the multi-point electric field intensity and charge density of a device surface, recognizing a charge abnormal region, and calculating an electric field non-uniformity index; inputting the information into a finite element analysis model, simulating an electric field distortion process, and positioning potential discharge induction points; predicting a charge accumulation trend of each potential point in combination with historical operation data, and constructing an optimization function taking minimization of global electric field distortion and charge accumulation risk as a target according to the charge accumulation trend; and with the function as a convergence target, an optimal electric field compensation parameter is automatically solved through iterative calculation. According to the partial discharge processing method and system based on electric field analysis, predictive recognition and counteracting are carried out on discharge core inducements, and active and accurate suppression of partial discharge of equipment is achieved.

The invention relates to the technical field of monitoring modeling, in particular to an electrostatic precipitation smoke emission dynamic modeling method based on multi-parameter coupling analysis, which comprises the following steps: calculating electric field rate and acceleration through sliding window difference, judging electric field abrupt change trigger parameter adjustment, normalizing particle size and charge density, and mapping disturbance intensity index. And calculating response delay and a gradient field to generate a disturbance coefficient, transferring a model weight when the disturbance exceeds a threshold value, performing fitting reconstruction, and performing regression weight reverse normalization to output a steady-state parameter group. According to the method, electric field dynamic characteristics are captured through equal-interval sampling in combination with a sliding window, an acceleration super-threshold model is constructed through second-order difference, a dynamic adjustment mechanism is triggered, particle size and charge density are normalized, disturbance intensity is mapped through linear interpolation, speed and density abrupt change are quantized through gradient weighting, and weight transfer and a least square method are introduced to reconstruct parameters. The transient analysis capability and robustness of the model are improved, and high-precision synchronous mapping of the emission trend and the equipment state is realized.

A microfluidic system for controlling movement of charged particles, including a microfluidic channel, at least three electrodes, a plurality of conductor leads and at least two drive power supplies. Each electrode is in electrical contact with the electrolyte, and a pseudo-capacitance, a double-layer capacitance or a combination thereof is formed at an electrode-electrolyte interface. Each drive power supply periodically produces a voltage or current excitation, and is connected to one or more electrodes via the conductor leads. Each electrode continuously undergoes charging-discharging alternating cycles to form a traveling-wave electric field in the microfluidic channel. A maximum charge capacity of each electrode is greater than a total amount of charges transferred thereon during a charging or discharging process. A control method based on the microfluidic system is also provided.

The present application relates to a method and to a device for setting an electrostatic charge of a sample. The method comprises the following steps: (a) adjusting at least one parameter of at least one particle beam such that, on average, each particle, incident on the sample, of the at least one particle beam releases a predefined average number of electrons from the sample; and (b) irradiating the sample with the at least one adjusted particle beam in order to set the electrostatic charge of the sample.

The application discloses a GIS insulator partial discharge charge on-line detection method and system, and relates to the technical field of charge detection.The method comprises the following steps: according to a GIS simulation model, simulating the electric field distribution of charge generation in the partial discharge process, determining the performance index of the required electric field sensing probe, and preparing the electric field sensing probe; according to an epoxy resin model, obtaining the charge density, the charge distribution range and the electric field signal collected by the electric field sensing probe under different voltage pulses, and constructing a test data set; according to the GIS simulation model, obtaining the electric field signal under different charge densities and different charge distribution radii, and constructing a training data set; training a neural network model according to the training data set, and correcting according to the test data set; and collecting the partial discharge electric field signal by using the electric field sensing probe array arranged on the outer wall of the GIS insulator, and obtaining the charge density and the charge distribution range on the surface of the insulator by using the neural network. Non-invasive and non-contact on-line measurement is realized.

The application provides a method for calculating interface polarization charge and current distribution based on reflection coefficient, and relates to the technical field of computational electromagnetics. The method comprises the following steps: establishing a reflection coefficient-dielectric parameter mapping, directly correlating the reflection characteristics of electromagnetic waves with the intrinsic parameters of the medium through a reflection coefficient formula, and laying a physical foundation for polarization analysis; interface electromagnetic field reconstruction, using boundary conditions and constitutive relations to determine the electric field distribution on both sides of the interface and the corresponding polarization intensity. The distribution rule of the electromagnetic field in the medium is determined, the macroscopic electric field is converted into the spatial description of the polarization intensity, and an intermediate variable is provided for charge and current calculation; polarization dynamic response quantification, through the spatial and temporal derivatives of the polarization intensity, the interface polarization charge density and the polarization current density are derived. The theoretical model is converted into actual physical quantities, and the dynamic response mechanism of charges and currents when electromagnetic waves interact with the medium is revealed.

The application relates to a satellite energy acquisition system based on space charged particle collection, belonging to the technical field of spacecraft power supply. The application aims at solving the problem that the discharge phenomenon of the space charged particles deposited on the surface of a satellite can cause physical damage to materials. The application comprises a collection capacitor used for capturing the space charged particles, forming a high-voltage electrostatic field through the accumulated charges of the space charged particles; an energy-taking conversion circuit used for converting the high-voltage electrostatic field energy stored in the collection capacitor into low-voltage electrostatic field energy and transferring the low-voltage electrostatic field energy to an energy storage capacitor; the energy storage capacitor is used for storing the low-voltage electrostatic field energy, setting a target electric field energy according to the working requirement of a rear-end load, and discharging after the target electric field energy is reached; and a switch voltage stabilizing circuit used for adjusting the discharging output voltage of the energy storage capacitor, realizing constant voltage power supply for the rear-end load. The application can reduce the charging and discharging fault risk of the surface of the satellite by collecting the particles radiated to the satellite and controllably transferring and utilizing the particles.

The invention discloses an S-type heterojunction Bi2Sn2O7 / Bi4O5I2 composite photocatalyst and a preparation method thereof, the in-situ composite Bi2Sn2O7 / Bi4O5I2 composite photocatalyst is obtained through the preparation steps of magnetic stirring, hydrothermal treatment, centrifugal washing and the like, and the in-situ composite Bi2Sn2O7 / Bi4O5I2 composite photocatalyst is applied to a photocatalytic water treatment method to achieve efficient removal of pollutants. According to the Bi2Sn2O7 / Bi4O5I2 composite photocatalyst prepared by the preparation method disclosed by the invention, an inner electric field is formed through the construction of an S-type heterojunction between Bi2Sn2O7 and Bi4O5I2, an excitation transmission path of photogenerated electrons is changed under the action of the inner electric field, migration and conversion of photogenerated charges are promoted, and then compounding of photogenerated electron-hole pairs is inhibited. It is worthy of noting that the discrete heterojunction of the Bi2Sn2O7 quantum dot modified Bi4O5I2 hollow nanotube is designed and constructed, and separation and axial transportation of photo-generated charges can be achieved. The discrete structure is beneficial to spatial separation of redox reaction sites, is also beneficial to separation of photogenerated charges, and is an ideal strategy for improving the charge separation efficiency and photocatalytic activity of the semiconductor material. The apparent rate constant k and the rate constant (0.3463 min <-1 >) of the Bi2Sn2O7 / Bi4O5I2 heterojunction, which are obtained according to a fitting quasi-first-order kinetic equation, are 1.9 times and 58.7 times of those of a Bi4O5I2 hollow nanotube (k is equal to 0.1792 min <-1 >) and a Bi2Sn2O7 quantum dot (k is equal to 0.0059 min <-1 >) respectively. The invention provides a feasible method for preparing a high-performance photocatalyst, and provides a new idea for the design of heterojunction.

The invention relates to a cyclotron which enables the production of α- or β-emitting radionuclides. The cyclotron, with a magnetic periodicity of 3, comprises three accelerating cavities connected to the centre, thus not requiring phase control between the cavities, forming a single high-frequency resonator. The six accelerating gaps per turn enable rapid acceleration (the angle ϕ between the accelerating gaps of each cavity being approximately 30°) which is essential for acceleration at the third and sixth harmonics. This cyclotron preferably has an injection system (31) supplied by different types of ion sources, making it possible to efficiently accelerate charged particles having Z / A ratios equal to 1 / 2 and to 1 / 4. The cyclotron may also have stripping extraction means positioned in the cyclotron so as to extract the charged particles and double their state of charge. These particles enable a set of nuclear reactions for producing α-emitting radionuclides.

The invention discloses a non-Newtonian fluid-based particle and biomolecule stepping separation method and device. Through microstructure arrangement of the non-Newtonian fluid, particles and biomolecules which cause different shear rates have blocking and passing characteristics, molecules with different volumes and different charge quantities are separated under the action of a square wave electric field, or molecules with different volumes and different charge quantities are separated under the action of a uniform gradient square wave magnetic field. The invention relates to a method for separating particles with different ferromagnetism or biomolecules combined with magnetic microbeads. Comprising a non-Newtonian fluid and a carrier thereof, a square wave electric field for providing power and a corresponding electrode or a magnetic field generator, and a support carrier for accommodating particles and biomolecules. After the particles and the biomolecules are separated in the square wave electric field for a period of time, the electric field intensity is changed, the second type of particles or biomolecules are separated, and the electric field intensity is sequentially switched according to the number of components to be separated, so that the separation purpose is achieved.

Described herein are systems and methods for assembling electron spin and charge to possess one or more properties of a magnetic monopole. Example systems can include a laser configured to generate a light beam with a first spin and / or a first orbital angular momentum, and a surface including a coupling structure having a geometrical charge. When exposed to the light beam, the surface is configured to enable excitations of surface plasmon polariton field waves at metal-dielectric interfaces of the coupling structure to generate a plasmonic field. The surface can be configured to focus the plasmonic field to form a plasmonic vortex, in which plasmonic spin-orbit coupling between a total spin and a total orbital angular momentum forms a topological spin texture that is homotopic to that of a magnetic monopole.

Anomalously large charge transport is provided using room temperature MIS (Metal-Insulator-Semiconductor) capacitive structures. Conductance can be 1 O× or more (often orders of magnitude more) than what would be expected from the classical properties of the structure. This anomalous behavior is attributed to topological states formed in the MIS structures under bias when there are both in-plane and out of plane components of the biasing electric field. One signature of this new physical effect is lateral supercurrents between the MIS structures. Another signature of this new physical effect is observation of quantum Hall effects at room temperature and in the absence of significant magnetic fields.

The application belongs to the technical field of space plasma environment detection, and particularly relates to a device and method for measuring particle composition and incident direction, which comprises: a detection unit array, which is respectively provided with a plurality of independent charge input channels in an inner circumferential direction and an outer circumferential direction; each charge output channel is used for outputting different initial charge pulse signals in the inner circumferential direction and different terminal charge pulse signals in the outer circumferential direction after a space charged particle is incident at an incident angle, and delay and amplification are performed respectively; and a back-end circuit analysis processing module, which is used for obtaining actual time of flight and actual incident azimuth angle time of the charged particle according to different initial pulse signals and terminal pulse signals collected for each charge output channel, obtaining the composition of the charged particle according to the obtained actual time of flight of the charged particle, and obtaining the actual incident azimuth angle of the charged particle according to the actual incident azimuth angle time.

To align two-stage aperture holes with high precision.SOLUTION: A beam detector includes a first aperture substrate formed with a first passage hole smaller than the inter-beam pitch of the multi-charged particle beam, a second aperture substrate formed with a second passage hole through which one detection target beam that has passed through the first passage hole can pass, and a sensor that detects a beam current of the detection target beam that has passed through the second passage hole. The second aperture substrate includes a conductive material, and a plurality of third passage holes through which light can pass are formed around the second passage hole.SELECTED DRAWING: Figure 1

Disclosed in the present invention are a particle accommodating device, and a particle contactless processing apparatus and a light sensing structure thereof. The particle accommodating device is used for accommodating a liquid specimen that contains a plurality of particles. The accommodating device comprises a light sensing structure and a mating structure spaced apart from the light sensing structure. The light sensing structure comprises a substrate, an electrode layer and a photoelectric layer which are formed on the substrate, and an insulator formed on the photoelectric layer. The insulator comprises a charge-type track protruding from the photoelectric layer. The photoelectric layer is operable to generate a plurality of charges that are concentrated on the charge-type track, so that the charge density of the charge-type track is greater than that of the outer surface of the photoelectric layer, and thus the charge-type track can position at least one of the particles thereon by electrostatic adsorption. Thus, the particles are moved and positioned by means of the electrostatic adsorption, thereby achieving precise positioning of the particles.

A process for charge detection mass spectrometry includes: acquiring a time-varying signal representative of a current induced on a detector by oscillatory motion of ions within a trapping region; processing the time-varying signal to derive a frequency of the oscillating motion; generating resonant ion selective time overview (STORI) data representing a relationship of STORIreal value to time and a relationship of STORIimag value to time based on the amplitude of the time-varying signal and the derived frequency of the oscillatory motion; regenerating STORI data based on a change in the frequency of the oscillatory motion over time; and determining a state of charge of the ion based on the regenerated STORI data.

The application belongs to the technical field of spintronics, and specifically forms a vortex of electron drift velocity at the interface of a magnetic layer and a metal layer by a difference in conductivity, further utilizes a spin vortex coupling effect to realize conversion of charge current to spin current, and thereby drives a magnetic moment to flip through a spin-orbit moment. As an example, the application deposits a Cu layer with high conductivity on a PtCo alloy layer with lower conductivity through magnetron sputtering, and constructs a heterostructure with a PtCo / Cu interface spin vortex coupling effect. By increasing the thickness of the Cu layer to improve the conductivity of the Cu layer, a significant improvement in the orbital moment efficiency can be observed. Not only does this provide valuable experimental evidence for in-depth understanding of the physical mechanism of interface-induced spin current, but also enriches the conversion approach between charge current and spin current, and opens up a simple and efficient new path for the research and design of a new generation of spintronic devices.

The application relates to a method for analyzing the charge accumulation characteristics of a polyimide material, which comprises the following steps: based on the multi-stress state of the electric field, temperature, mechanical stress and irradiation of the polyimide material in a deep space environment, applying multi-stress synergy to the polyimide material; constructing a dynamic charge migration model of the polyimide material under the multi-stress synergy, and analyzing the charge accumulation characteristics of the polyimide material. Based on the multi-stress state of the electric field, temperature, mechanical stress and irradiation of the polyimide material in a deep space environment, multi-stress synergy is applied to the polyimide material, so that the distortion problem of traditional single stress or two-by-two combined stress measurement is solved; through the dynamic charge migration model, the charge accumulation characteristics of the polyimide material under the action of the electric field, temperature, mechanical stress and irradiation are analyzed, and accurate prediction and regulation of the electric performance of the polyimide material are realized.

The invention relates to a particle collision device (10) for detecting an electrical charge after a collision of a particle (12) with a collision partner (14), with an acoustic particle holding device (16), a particle preparation device (32) for changing at least one particle property of the particle (12), a collision partner (14) and a charge detector (28) which is configured to detect an electrical charge of the particle (12) and / or the collision partner (14) after a collision of particle (12) and collision partner (14).

The present application relates to rare earth resources exploration technical field, specifically to a kind of ion adsorption type rare earth content determination method, system, equipment and medium, the method by constructing the quantitative relationship prediction model between the normalized charge rate and total rare earth oxide mass fraction, impedance measurement system is arranged in study area, impedance amplitude and phase are collected, normalized charge rate is obtained based on impedance amplitude and phase, the quantitative relationship prediction model between the normalized charge rate and total rare earth oxide mass fraction is constructed, and total rare earth oxide mass fraction is calculated based on quantitative relationship prediction model.The present application method considers the surface electrical property influence of ion adsorption type rare earth ore sample, establishes the correlation between frequency spectrum induced polarization response and chemical parameter, and estimates the rare earth oxide content in ion adsorption type rare earth sample using it.

According to the insulator surface charge cleaning method based on plasma discharge provided by the invention, the surface charge of the insulator can be actively, quickly and safely neutralized and cleaned through a composite discharge mode of pulse + direct current bias under the condition that equipment is not disassembled; the method comprises the following steps; equipment connection; setting and generating parameters of a composite waveform; high-voltage amplification; the plasma discharges to sweep charges; the discharge plasma device generates a high-pulse voltage electric field to reach gas breakdown field strength, a violent ionization reaction occurs, a large number of charged particles are further generated, and when superposed voltage acts during a pulse interval, the charged particles generated during the pulse interval migrate to the surface of the insulator under the action of the electric field generated during the pulse interval, so that the charged particles are formed. When residual charges in the discharge space are swept, migrated charges are used for neutralizing charges on the surface of the insulator, so that the charges on the surface of the insulator are swept; and cleaning is finished.

This light-emitting element comprises a charge transport layer between an anode and a light-emitting layer, or between the light-emitting layer and a cathode. The charge transport layer includes a first layer, a second layer, and a third layer in this order from the anode side. The second layer has a lower ionization potential and a lower electron affinity than the first layer and the third layer. Alternatively, the second layer has a higher ionization potential and a higher electron affinity than the first layer and the third layer.