37results about How to "Sampling is simple" patented technology

The invention relates to a simultaneous localization and mapping method based on distributed edge unscented particle filter. First, a coordinate system is built and an environmental map is initialized; then subfilters are built for each landmark point with successful matching respectively; next, based on a robot motion model, a particle swarm is generated in each subfilter respectively, and the state vector and the variance of each particle are obtained; noise is introduced, particle state vectors after extension are calculated by utilization of unscented transformation, the particles after extension are updated and the particle swarms are optimized; then particle weights are calculated and normalization is carried out, and aggregated data of each subfilter are subjected to statistics and the data are sent to a master filter; next, global estimation and variance are calculated; then the effective sampling draw scale and sampling threshold of each subfiter are determined, the subfilters with severe particle degeneracy are subjected to resampling; then the state vectors and the variances of the robot are output, and stored in a map. Finally, landmark point states are updated by utilization of kalman filtering algorithm until the robot is no longer running.

The invention discloses an immunochromatographic reagent strip, and particularly relates to an immunochromatographic reagent strip for detecting PCT (procalcitonin) and a preparation method of the reagent strip. A detection line is arranged on immunochromatographic test paper, and is formed by coating of an antibody, the antibody is selected from a mouse anti-human PCT monoclonal antibody, and a quality control line is formed by coating of a sheep anti-mouse IgG polyclonal antibody; the mouse anti-human PCT monoclonal antibody and colloidal gold are prepared into a colloidal gold combined pad. The preparation method of the immunochromatographic reagent strip for detecting the PCT is characterized by comprising the following steps: A, coating a nitrocellulose membrane with a detection line working solution and a quality control line working solution of each antibody, drying the obtained nitrocellulose membrane at a temperature of 36-38 DEG C for 8-12 hours to obtain a chromatographic membrane; B, preparing the mouse anti-human PCT monoclonal antibody and the colloidal gold into the colloidal gold combined pad; and C, sequentially adhering a sample pad, the colloidal gold combined pad, the chromatographic membrane and a water absorbing pad on a rubber plate to prepare the immunochromatographic reagent strip for detecting the PCT.

The invention provides an acute toxicity algae infrared testing method of toxic and harmful substances, which adopts the sensitive algae liquid with the chlorophyll content not less than 4.0mg.L-1 and the toxicity test factors of a portable infrared thermometer. The contrast toxicity test is carried out by selecting the processing and concentration design of a test sample, the response dose and the minimum response concentration of the sensitive algae to the sample are determined by the sample dilution concentration and the adding amount of a first-appeared temperature response during the dilution concentration test of using different samples for response temperature difference and response time so as to determine the toxicity of the sample. The sensitivity of the method of the invention can achieve the sensitivity of a luminous bacteria method, the average testing time of the method and the average testing time of the luminous bacteria method are similar, the testing effect ofthe acute toxicity algae infrared testing method of the toxic and harmful substances is the same with the testing effect of the luminous bacteria method. The invention is characterized by convenient test, low cost, strong specificity, field test and so on.

The present invention relates to a device 1 and a method for connecting strip ends of steel strips, having shears 4, wherein the shears 4 comprise an upper blade carrier 40 having one or more upper blades 44 and a lower blade carrier 46 having one or more lower blades 48, a welding appliance 60, at least one welding table 70, 72 and side parts 2 for horizontally moving the strip ends, wherein the welding appliance 60 and the shears 4 are separated from one another in their planes of action.

The invention provides a sampling apparatus and a sampling method for simultaneous collection of exhaust gas pollution source size-fractionated particles and gas phase organic matters. The sampling apparatus comprises the following components: a multifunctional sampling pipe which is connected to a flue; an Andersen fractionation sampler which is connected to the multifunctional sampler, wherein the diameter of an air intake of the Andersen fractionation sampler and the diameter of an inner pipe of the multifunctional sampling pipe are identical; an outlet end of the Andersen fractionation sampler which is connected to a quartz fiber filter membrane cylinder; a condensation unit which is connected to an outlet end of the quartz fiber filter membrane cylinder; an ion exchange adsorption resin unit which is connected to an outlet of the condensation unit; a drying unit which is connected to the ion exchange adsorption resin unit; and a sampling instrument host which is connected to the drying unit. The sampling apparatus can be used for simultaneously collecting the exhaust gas pollution source size-fractionated particles and the gas phase organic matters; equipment in the sampling apparatus has the advantages of easy connection, easy operation, simple and easy sampling, good effects, high accuracy, and environmental and social dual benefits.

The invention provides a simple and easy flow equalization scheme of a parallel system. The parallel system consists of power supply modules with multiway switches in parallel connection, the flow equalization scheme adopts an independent PWM (Pulse Width Modulation) controller, output currents of all the power supply modules are sampled and fed back to the PWM controller, and output voltage of all the power supply modules is regulated by the PWM controller, so that the flow equalization of the output of all the power supply modules is achieved. The flow equalization scheme is characterized in that sampling of the output currents of all the power supply modules is realized through detecting voltages at both terminals of a capacitor C in an RC (Remote Control) network. For the flow equalization scheme of the parallel system, when the output currents of all the power supply modules are sampled, the sizes of a load current and an inductive current are detected, only the size of the voltage of the capacitor in the RC (Remote Control) network is required to be detected, by the method, the currents are conveniently, simply and easily sampled without depletion, the cost is low, and current distortion is not caused.

The invention discloses an audio and video transmission system based on quantum encryption. The system comprises a first quantum key generation module, a second quantum key generation module, a quantum key transfer module, a file storage module, an audio and video extraction module, an audio encryption module, an audio decryption module, a video sampling module, a video coding module, a video decoding module, a video encryption module and a video decryption module. The method has the beneficial effects that the two quantum key generation modules are respectively used for encrypting and decrypting audios and videos, so that the high requirement of simultaneously transmitting the audios and the videos in one file by utilizing one quantum key generation module on the coding speed of the quantum key in the prior art is reduced.

The invention proposes a three-phase driving bridge lower bridge arm three-resistor based motor current sampling method and system. Current sampling is triggered according to periodic change of a PWMdriving signal, a section where a motor rotor is currently located is simultaneously judged, current sampling is performed by combining the characteristic of a central edge aligned to the PWM modulation signal and distribution characteristic of each phase voltage at each section, the current sampling accuracy is high, the voltage utilization efficiency is high, moreover, no complicated circuit isused, the cost is low, soft implementation is easy, and a few CPU resources are occupied.

The invention discloses a device for testing fogdrop content in smoke gas and a method for testing fogdrop content in smoke gas. The device for testing fogdrop content in smoke gas comprises a fogdrop absorbing bottle, a pitot tube, an acid gas absorbing bottle, a dryer, an intelligent dynamic pressure balance smoke dust sampling pump and a connecting pipe between the fogdrop absorbing bottle and the pitot tube, and a connecting pipe between the pitot tube and the intelligent dynamic pressure balance smoke dust sampling pump. The device applies absorption liquid to absorb fogdrop with all grain diameters in the smoke gas, thus the sampling bias is reduced; through measuring the Mg2+ content in the absorption liquid, the fogdrop content is directly obtained; the fogdrop absorbing bottle is arranged at the head part of the pitot tube, and extended to a smoke flue in measurement to sample; the device and method for testing fogdrop content in smoke gas can absorb the fogdrop in the smoke gas by the absorption liquid, thus the sampling bias is reduced; through measuring the Mg2+ content in the absorption liquid, the fogdrop content is directly obtained; the method and device are convenient and fast.

The invention discloses a sampling device and sampling method for massively collecting atmospheric gaseous mercury in a short term. The sampling device comprises a filter membrane box for filtering away atmospheric particulate matter, an atmospheric gaseous mercury sampling unit connected with an outlet of the filter membrane box, an instantaneous flow meter connected with the outlet end of the atmospheric gaseous mercury sampling unit, a vacuum pump connected with the outlet end of the flow meter, and a volumetric flow meter connected with an outlet of the vacuum pump, wherein the atmosphericgaseous mercury sampling unit is composed of six gold-plated quartz sand tubes and two modified conical funnels. The sampling device is capable of collecting a sufficient amount of atmospheric gaseous mercury for isotope analysis within a few hours; and equipment in the sampling device is easy to assemble and disassemble and easy to operate; sampling is simple and easy; and the accuracy is high.

The invention discloses a standard clamp rail type intelligent photovoltaic battery pack string monitoring device. The device adopts a milliohm divertor and one sampling channel of a dual-channel analog-digital converter ADC to sample the stringing current, adopts a voltage sampling resistor and another sampling channel of the dual-channel analog-digital converter ADC to sample the stringing voltage, adopts a build-in temperature sensor of the dual-channel analog-digital converter ADC to measure the working temperature of the fuse, and adopts a self-excited isolated power source to supply power. The device of the embodiments of the invention can be used to overcome various defects in the prior art, can be used to monitor various parameters, such as the photovoltaic battery pack string voltage, current, fuse state, temperature, etc., and has advantages of high acquisition accuracy, no current measurement zero offset, small temperature drift, high accuracy voltage measurement, small occupied space and easy installation.

The invention provides a method and a device for sampling and measuring surface soil to obtain soil potential radon concentration by using an electrostatic collection emanometer. The method comprisesa sampling process and a measuring and calculating process, and can quickly obtain an accurate soil potential radon concentration by a simple calculation method. A measurement system is closed by a sealing cover to form a closed loop gas path measurement device to improve the accuracy of the measurement. When measuring the production rate of radon and soil porosity for sampled soil, the decay, leakage and anti-diffusion effects of the radon are taken into consideration. An electrostatic collection manometer is used, the concentration of the radon is deduced reversely by the concentration of Po-218, and the accurate soil potential radon concentration is quickly calculated by using a nonlinear fitting algorithm, which saves measurement time since it is needless to wait for the concentrationof the radon in a measurement device to be stable.

The invention relates to the technical field of biomedicine, and provides a preparation method and application of a human pluripotent stem cell senescence model. The preparation method of the human pluripotent stem cell senescence model comprises the steps that peripheral blood monocytes from Chinese mutant HGPS patients are reprogrammed into Chinese HGPS-iPSC; c.1579C)T(p. R527C) mutation of LMNAis repaired by using a single nucleotide mutation repair technology mediated by CRISPR/Cas9 and ssODNs; normal iPSC, Chinese HGPS-iPSC and mutation correction iPSC are differentiated into functionalMSCs respectively in vitro, and the expression, cell proliferation, apoptosis, cell cycle, cell senescence and the like of LMNA protein in three iPSC-MSCs are detected, thereby disclosing the effect of the c.1579C)T(p. R527C) mutation on an expression function of cell-related passage signaling molecules, and studying the molecular mechanism and pathogenic mechanism of the Chinese HGPS which are different from Caucasian population mutant HGPS.

The invention discloses a lens assembly, a device for detecting the attachment magnitude and a household appliance. The lens assembly comprises a lens and a surface mesh part and is arranged on the device for detecting the attachment magnitude; a light transmitting surface is arranged on one side of the lens, and an incident surface and an emergent surface are arranged on the other side of the lens; the surface mesh part and the light transmitting surface are spaced with each other and are oppositely arranged, and a plurality of meshes are formed in the surface mesh part. The lens assembly disclosed by the invention is easy to sample and can increase the scope of the quantity of light reflected by attachments.