62results about How to "Address sensitivity" patented technology

A voltmeter measures an unknown voltage on a target surface using multiple sampling stages or a parallel reference capacitor. A movable shutter may alternately be closed during resetting of a voltage measuring circuit and opened so as to expose a detector plate to the target surface during two sampling stages. Alternatively, the shutter may be used to modulate exposure of a detector plate to the target surface.

The invention discloses a preparation method and application for an amphoteric polycarboxylate water reducer containing anions and cations. The method is designed through a high-molecular structure, and the quaternary-ammonium-salt type carboxylate water reducer terminated with a cation is synthesized by performing modification on allyl polyethenoxy ether. According to the synthesized water reducer, anionic charges and cationic charges are both introduced into the molecular structure of the water reducer, when the water reducer is added into cement slurry, anionic charges at the main chain are adsorbed on the surface of cement particles with positive charges, and the anionic charges at the terminals of side chains are adsorbed on the surface of cement particles with negative charges, so that cement particles are dispersed. Cations are capable of inhibiting expansion of soil, so that adsorption of soil to additives is reduced. Because of the unique amphoteric structure of the water reducer, the water reducer possesses unique dispersing capability, high water reducing rate, good slump maintenance property and excellent performances. Also, the invention provides the amphoteric polycarboxylate water reducer prepared by employing the method, and application of the water reducer to concrete.

A method for facilitating semantic event classification of a group of image records related to an event. The method using an event detector system for providing: extracting a plurality of visual features from each of the image records; wherein the visual features include segmenting an image record into a number of regions, in which the visual features are extracted; generating a plurality of concept scores for each of the image records using the visual features, wherein each concept score corresponds to a visual concept and each concept score is indicative of a probability that the image record includes the visual concept; generating a feature vector corresponding to the event based on the concept scores of the image records; and supplying the feature vector to an event classifier that identifies at least one semantic event classifier that corresponds to the event.

The invention discloses a method for troubleshooting an electromagnetic radiation sensitivity fault of an electronic product, and aims to provide a fault point troubleshooting method, which is simpleand easy to do, convenient, rapid and high in test and diagnosis efficiency. The method in the invention is realized through the technical scheme as follows: a general measuring instrument is connected onto an external socket of a measured electronic product device through a shielding test cable; spare contact pins or temporarily unused contact pins on the external socket are utilized for being correspondingly connected to a detection conductor wire, and connected onto a test point of a circuit board in the measured electronic product device needing to be detected; in a normal conduction, an electromagnetic interference transmitter applies electromagnetic radiation interference in a laboratory; the voltage signal or the signal waveform of a sensitive circuit of a measured electronic circuit board is detected; an electromagnetic radiation sensitivity point is troubleshot; detection interference waveform is transmitted to the shielding test cable through the detection conductor wire, andintroduced into the general measuring instrument outside the measured electronic product; and interference waveform reflecting the electromagnetic radiation sensitivity point is detected.

The invention relates to a soil insensitive polycarboxylic acid water reducer and a preparation method of the reducer. The water reducer is prepared by taking a 4-hydroxybutyl vinyl ether macromonomer, unsaturated carboxylic acid, unsaturated sulfonate and an unsaturated ester micromonomer as a comonomer, and an initiator and a chain transfer agent as a molecular regulator for copolymerization reaction. A mass ratio of the 4-hydroxybutyl vinyl ether macromonomer to unsaturated carboxylic acid to unsaturated sulfonate to the unsaturated ester micromonomer to the initiator to the chain transfer agent to deionized water is (24-120):(4-8):(6-8):(10-20):(0.8-1.5):(0.4-2):(70-120). The invention further provides the preparation method of the water reducer. The water reducer is insensitive to a sand content of a sandstone material in concrete; when the water reducer is used for the concrete with the high sand content, the water reducer has higher water reducing capability and smaller slump loss than the traditional polycarboxylic acid water reducer; and the water reducer solves the problem that the traditional polycarboxylic acid water reducer is sensitive to soil, a raw material of sandstone, in the concrete application.

The invention belongs to an electromagnetic and eddy current testing technology category in the field of nondestructive testing. When a traditional eddy current sensor is used for detecting a curved surface part, very loud lift-off noise exists in a detection signal since the lift-off height is continuously changed, so as to result in a very high missed detection probability, while a flexible eddy current sensor can well reduce the changes of the lift-off height to inhibit the lift-off noise due to the flexible and deformable characteristics thereof. According to the flexible eddy current sensor, a Koch fractal planar eddy current sensor is integrated into a flexible printed circuit board, and is bonded with flexible magnetic adhesive, so as to form a flexible array eddy current sensor. When detecting a ferromagnetic part, through the effect of magnetic force between the magnetic adhesive and the part, the sensor is attached to a test piece in a self-adapting manner, so that the lift-off noise caused by lift-off is avoided, thereby improving the sensibility of eddy current to curved surface detection.

The invention discloses a ship type recognition method based on compactness measurement weighting. A conventional method for target recognition based on one-dimensional distance image mainly carries out the extraction of the one-dimensional distance image, and carries out the direct weighted processing of the features with no reference to the compactness measurement of the features. The method firstly carries out the noise reduction and normalization of raw HRRP data, thereby solving a sensitivity problem of HRRP to amplitude. The method extracts a target region through estimating the starting and ending points of a ship, and carries out the preprocessing of HRRP data, thereby solving a translation problem of HRRP. The method solves a problem of HRRP attitude sensitivity to a certain extent through extracting invariant features of attitude. Because the compactness measurement of all extracted features is different, the method enables the extracted features to be multiplied by the compactness of all features according to the compactness measurement of sample features, reflects the difference of weights of different features in a process of classification and recognition, and then carries out the classification and recognition of testing samples through employing a nearest neighbor method.

The invention discloses a rapid PCR ((Polymerase Chain Reaction) testing method of a silkworm densovirus BmDNV, which comprises the steps of: rapidly extracting a template DNA of the silkworm densovirus BmDNV by adopting a boiling precipitation method, and designing a specifc primer to test the silkworm densovirus BmDNV through the PCR method. The rapid PCR testing method of the silkworm densovirus BmDNV can be used for effectively extracting the template DNA of the silkworm densovirus BmDNV and testing the silkworm densovirus BmDNV rapidly and accurately, is applicable to small-amount sample operation, and is simple to operate; the DNA sample prepared by using the method can meet the requirement of the PCR method on molecular diagnosis of the silkworm densovirus BmDNV; and the rapid PCR testing method of the silkworm densovirus BmDNV lays the foundation and provides technical reservation for early diagnosis and prediction check of BmDNV by applying a PCR technology.

A slowly-releasing anticanser composite medicine implanted in human body is composed of the anticancer medicine prepared from implantation agent, slowly releasing agent and dichloroethane-kind medicine for suppressing the growth of tumor cells and the medicinal additive chosen from biocompatible and biodegradable polymer for slowly releasing said anticancer medicine toward tumor.

The invention discloses an on-line monitoring and diagnosing method and device for a tap switch and a storage medium. The method comprises the steps of: respectively obtaining monitoring waveforms ofthe odd number side and the even number side of a selector switch in an on-load tap switch; building an electromagnetic transient simulation model of the tapping switch, and carrying out the simulation of the normal switching of the on-load tapping switch, and obtaining the simulation waveforms of the odd and even sides of the switching switch of the on-load tapping switch; judging whether the internal electrical state and the mechanical state of the on-load tap-changer are normal or not according to the monitoring waveform and the simulation waveform; if the working state of the on-load tap-changer is judged to be normal, ending; otherwise, comparing with the fault simulation waveform in the fault simulation waveform library, or setting new fault re-simulation calculation until the simulation waveform consistent with the monitoring waveform characteristics is obtained, and determining the fault reason. According to the invention, on the premise of not changing the original wiring andstructure of the tapping switch, the internal electrical quantity of the switch is monitored in real time, and the working state of the on-load tapping switch is diagnosed through simulation comparison.

The invention relates to a gas-liquid separator for a portable fuel cell system. The gas-liquid separator comprises a gas-liquid separator cavity, a liquid suction soft pipe, a counterweight material,a fuel inlet, a fuel outlet, a gas-liquid mixture inlet, a gas outlet, a gas outlet pipe, a heat dissipator, a liquid level sensor, a baffle and other components, and has a symmetrical structure, wherein the liquid suction pipe is made of a flexible silicone rubber pipe capable of bending and having a certain strength, and naturally sags under the action of the counterweight material, the fuel inlet, the fuel outlet, the mixture inlet and the gas outlet pipe are respectively arranged on the centerline of the gas-liquid separator cavity, the gas-liquid mixing product of the fuel cell enters the gas-liquid separator cavity, and passes through the gas path formed by the baffle, and the water in the product is separated. Compared to the gas-liquid separator in the prior art, the gas-liquid separator of the present invention has the following advantages that the structure is simple, the water recovery does not require extra electric energy, and the gas-liquid separator can be used normallywithin an inclination angle range of +/-90 DEG.

The invention relates to the field of water reducers, in particular to a polycarboxylate water reducer and a preparation method thereof. The preparation method mainly comprises the following steps: anunsaturated phosphonic acid monomer and maleic anhydride are subjected to esterification to obtain an esterification product; a molecular weight regulator aqueous solution and an acrylic acid aqueoussolution are added into a mixed initiator, a polyoxyethylene ether macromonomer and the esterification product for reacting at 50-60 DEG C for 1-3 hours. The unsaturated phosphonic acid monomer is esterified with the maleic anhydride, double bonds are introduced into the esterification product, and the esterification product, the polyoxyethylene ether macromonomer and the acrylic acid are polymerized. According to the method, more phosphoric acid groups can be introduced by first introducing the double bonds and then performing polymerization. The problem that polycarboxylate water reducer and concrete material sensitivity caused due to the change of concrete raw materials is overcome, the production method is simple and is convenient to popularize and apply.

The invention discloses a magnetorheological fluid technology based isothermal amplification type tera-hertz multichannel microfluidic chip and a method thereof for detecting pathogenic bacteria. Thechip comprises a rolling circle amplification (RCA) reaction module, a magnetorheological fluid switching module, a metamaterial nanoparticle signal amplification module and a microfluid chip structure. The microfluid chip structure is of a compass-type structure with a plurality of detection channels, a total inlet is formed in the center of the microfluid chip structure, and each detection channel is sequentially connected with the RCA reaction module, the magnetorheological fluid switching module and the metamaterial nanoparticle signal amplification module from inside to outside. Accordingto the detection method, the problem that water susceptibility and sensitivity are low is solved by using RCA, magnetorheological fluid and the metamaterial nanoparticle signal amplification module.As a novel method for rapidly and accurately detecting the pathogenic bacteria, the detection method has an important significance in diagnosis and treatment of infectious diseases.

The invention discloses a random decrement technology-based structure dynamic characteristic identification method. The method is specifically implemented by the following steps of A, performing a real object model experiment: performing system carrying and debugging, arranging measurement points, and outputting a circumferential acceleration response in a corresponding direction under a certain excitation; B, performing finite element model building according to model parameters of a real object model, and performing acceleration excitation on a finite element model under different time-history conditions to obtain vibration modes and frequencies of different orders; C, performing measurement point arrangement and corresponding output: arranging measurement points according to the structure of the finite element model, and outputting an acceleration response in a required coordinate axis direction under a given sampling frequency; and D, processing response data: under a given triggering condition, extracting a time slice length, processing each measurement point by adopting a random decrement technology and an Ibrahim time domain method, and performing comparative analysis on the obtained data to check the application range and precision of the random decrement technology in dynamic characteristics.

The invention relates to a visual rapid detection method for canine distemper viruses. According to the detection method, on the basis of fusion of an immunochromatography technique and molecular biology means and through combination of LAMP which is high in amplification efficiency and lateral flow dipstick which is convenient for result observation, a detection result is more intuitive; the detection method has the characteristics of being visual, rapid in diagnosis, accurate and the like; shortcomings of conventional detection methods which are complex in operation, low in sensitivity and low in specificity can be overcome; and the detection method provided by the invention is applicable to fields of clinical diagnosis, food safety, animal disease detection and the like.

The invention provides a three-area current differential protection method, and belongs to the technical field of current differential protection in a power system. The area which the relative relationship of double-end currents belongs to on an amplitude-phase plane is judged, a fault type is judged, and whether protective actions are carried out or not is decided according to the judgment results. The amplitude and the phase of double-end currents are made full use of, the whole amplitude-phase plane is divided into three areas including a braking area, a fuzzy area and an action area, whether protective actions are carried out or not is determined according to the area where the relative relationship of the double-end currents is located, by means of an external fault CT linear area, high-resistance faults in the area and external fault CT saturation is judged in the fuzzy area, contradiction between sensitivity and safety is eliminated, and meanwhile, by means of the method, an external fault can be converted into a fault in the corresponding area quickly.

The invention relates to a system for improving geothermal energy and solar energy integrated thermoelectric conversion efficiency. The system is characterized by comprising an evaporator, a heat regenerator, a fractional distillation condenser unit, a solar ammonia collector, a separator, a turbonator and an ammonia feeding pump. The invention aims to provide the system for improving geothermal energy and solar energy integrated thermoelectric conversion efficiency, and belongs to the technical field of geothermal energy and solar energy thermoelectric conversion device. Compared with the traditional geothermal power generation technology, the system provided by the invention adopts Karina cycle technology and utilizes medium and low temperature heat sources, the cycle efficiency of the system is higher than general Rankine cycle for 20 percent to 50 percent within the medium and low temperature range, which is considerable in energy utilization, and the operational reliability and generating efficiency are improved. The method for collecting solar heating ammonia steam by the solar ammonia collector is mature in technology, and is economical and feasible, and the solar-thermal conversion efficiency is higher than 95 percent, which can not be surpassed by other solar heat collectors.

The invention relates to an optical switch based on a plane waveguide and a manufacturing method thereof. By using the optical switch based on the plane waveguide and the manufacturing method thereof provided in the invention, the structure is compact, the size is small, system integration is convenient, and problems of wavelength sensitivity and temperature sensitivity of an existing optical switch can be simultaneously solved. The optical switch based on the plane waveguide comprises a plane substrate and an M-Z interferometer arranged on the plane substrate. The structure of the optical switch is characterized in that the M-Z interferometer comprises an incident waveguide, 3dB couplers, an emergent waveguide, a main waveguide and a branch waveguide, wherein the main waveguide and the branch waveguide are connected in parallel between the two 3dB couplers; a main waveguide surface is provided with a metal heater; and the main waveguide includes two waveguide branches formed by two kinds of calorescence dispersion coefficient materials.

The invention provides an application of histone methyltransferase EZH2 in preparation of a biomarker for diagnosing sepsis severity or prognosis. The invention also provides a kit for diagnosing sepsis severity or prognosis. The kit contains a reagent for detecting histone methyltransferase EZH2 in a body fluid sample. The invention finds that the expression quantity of EZH2 in peripheral blood Tcells of a clinical sepsis patient is obviously higher than that of EZH2 in a healthy examinee; the SOFA score of the sepsis patient is positively correlated; through ROC curve analysis, it is foundthat the expression level of EZH2 in T cells can be used as a new biomarker for predicting sepsis prognosis, EZH2 is provided as an index for diagnosis, prognosis and treatment monitoring of sepsis infection, and the severity of sepsis can be evaluated.

The invention discloses a method for preparing a gold nanorod material through reduction of hydroquinone under the action of double surfactants, and under the combined action of cetyl trimethyl ammonium bromide (CTAB) and sodium oleate (NaOL), gold nanorods are synthesized by adopting a seed-mediated method. The method comprises the following steps: mixing a certain amount of CTAB and chloroauric acid (HAuCl4) in a bottle, then adding sodium borohydride (NaBH4) prepared from an ice-water mixture, and vigorously stirring for 2 minutes by a magnetic stirrer until the solution becomes brown yellow from golden yellow; leaving the mixture to stand for 30 minutes to obtain a seed solution; dissolving CTAB and NaOL with corresponding low concentrations in another bottle at 50 DEG C to serve as a growth solution, cooling the growth solution to about 30 DEG C, and then adding silver nitrate (AgNO3) and chloroauric acid, and conducting stirring at room temperature for 60-90 minutes to enable the solution to become clear from golden yellow; adding hydroquinone and the seed solution sequentially; and conducting vigorous stirring by using a magnetic stirrer, and leaving the mixture to stand for 12 hours at a constant temperature of 30 DEG C to obtain a final product.