83results about How to "Avoid cross influence" patented technology

The invention relates to the field of gas sensitive sensors, and in particular relates to an array type smell detecting element based on an MEMS (Micro Electro Mechanical System) technology. The problem that the individuals in the gas sensitive sensor array used by the existing electronic nose are not uniform in response to characteristic drift is solved. The detecting element comprises a semi-conductor substrate, as well as a gas sensitive unit, a temperature sensing unit for detecting the working temperature of the gas sensitive unit, and a heating unit for heating the gas sensitive unit to the needed working temperature, wherein the gas sensitive unit, the temperature sensing unit and the heating unit are obtained by being processed with the MEMS processing technology on the semi-conductor substrate; the gas sensitive unit comprises a plurality of gas sensitive metallic oxide thin films which are arranged in the light of an array; the gas sensitive metallic oxide thin films are different in size parameters but the same in type; and each thin film is provided with two electrodes for connection with data acquisition equipment. The array type smell detecting element is simple in structure and can be realized by being processed with the MEMS technology which is relatively maturely developed; and in addition, the array type smell detecting element is beneficial to the realization of the integration and the miniaturization of the electronic nose and achieves reasonableness in method and correctness in identification.

The invention discloses a second-generation sequencing method for dimolecular self-checking library preparation and hybrid capture used for trace DNA ultralow frequency mutation detection. The methodcomprises the following steps: extracting plasma free DNA, performing DNA chemical error repair, preparing a self-checking dimolecular identification code hairpin type joint, repairing plasma free DNA, connecting DNA with the joint, and performing Pre-PCR amplification, excessive hybrid capture, Post-PCR amplification, computer sequencing, data error correction, and mutation analysis and annotation. The method disclosed by the invention can efficiently realize low frequency mutation detection of plasma free DNA. DNA error repair and dual redundancy checking technology can enable the method tohave ultralow false positive rate and high sensitity while detecting trace samples, thus avoiding defects of existing plasma circulating free DNA detection methods, not only realizing cancer mutationdetection and targeted medication guidance, but also realizing early screening of genetic and birth defects of fetus.

The invention relates to the technical field of catalysts for preparing gasoline, in particular to a catalyst for preparing a gasoline blending component through alcohol-naphtha coupling, a preparation method and application thereof. The catalyst comprises a metal modified molecular sieve, a rare earth element modified molecular sieve, one or multiple active components like platinum, palladium, tin and rhenium loaded on a carrier and two or three active components like nickel, molybdenum and tungsten. The catalyst has functions of isomerization, naphthene dehydrogenation, cracking, alkylation,aromatization and desulfurization and can effectively increase gasoline yield and octane value of gasoline and lower sulfur content.

The invention relates to the technical field of environmental monitoring, and provides an atmospheric environmental pollutant prediction model based on a dynamic space-time attention mechanism. The model comprises the following steps: acquiring concentration data, temperature data and humidity data of pollutants at S monitoring stations, and constructing an input matrix; performing one-dimensional convolution operation on the input matrix to obtain an original sequence; constructing a space-time encoder, and inputting the original sequence into the space-time encoder; adding a convolution gating unit to control the output of the space-time encoder; constructing a static attention mechanism and a dynamic attention mechanism, and fusing the static attention mechanism and the dynamic attention mechanism with output information of the space-time encoder to obtain encoding information of a target site; and constructing a decoder, decoding the coding information of the target site, and outputting a prediction result. By means of the technical scheme, the problem that in the prior art, an air pollutant prediction model is poor in prediction accuracy is solved.

The invention, which relates to the field of gait detection and recognition, discloses a gait detection and recognition system and method based on micro-nano optical fiber composite sensing. The system comprises a light source module, an optical fiber coupling module, a detection demodulation module, a signal processing module, an upper computer module and a plurality of micro-nano optical fiber composite sensors. Each micro-nano optical fiber composite sensor comprises a multi-core optical fiber, a photonic crystal optical fiber and a single-mode optical fiber which are connected in sequence;a tapering area is arranged on the single-mode optical fiber; the connection position of the multi-core optical fiber and the photonic crystal optical fiber is a first collapse area; and the connection position of the photonic crystal optical fiber and the single-mode optical fiber is a second collapse area. According to the invention, the sensor can be prevented from being influenced by cross inthe measurement process, so that three-dimensional gait detection and recognition of multi-information fusion are carried out, and the measurement precision and recognition rate are effectively improved.

The invention provides a multi-modal network control-data plane consistency verification method and device. The method comprises the following steps: loading a consistency verification component in a multi-modal network control plane, and loading a probe generation component and a log sampling component in a multi-modal network data plane, wherein the probe generation component injects detection flow into a network, so that the detection flow is forwarded through a data plane; using the log sampling component for sampling, analyzing and sorting the detection flow which is forwarded and output by the data plane, and sending a sorting result to the consistency checking component; and enabling the consistency verification component to compare a network configuration information analysis result in the control plane with a sorting result generated by the log sampling component to complete verification work, wherein the network configuration information analysis result and the sorting result generated by the log sampling component adopt the same file format. According to the invention, consistency verification of the control plane and the data plane can be completed, and security support is provided for a multi-mode network to bear various services.

The invention discloses a passive type body liquid sample screening and examining device based on paper diaper and a using method thereof, relates to an examining device of body liquid sample, and aims to solve the problem that the conventional device is inconvenient to use, a sample with a small volume cannot be measured accurately and reliably, and the results cannot be maintained for a long time. From the top to bottom, the device sequentially comprises a surface layer made of a hydrophilic material, a collecting layer made of a hydrophobic material, a test layer made of a hydrophilic material, a protective layer made of a hydrophobic material, and a read layer made of a hydrophobic material; the collecting layer comprises a central outlet arranged on the center of the collecting layer, and a self locking switch arranged on the center outlet; and the test layer comprises a test layer body, a route network for passing fluids, and a detection reaction reagent block arranged in the route network. The provided device can detect small volume samples, is capable of detecting multiple markers, and has the advantages of reliable test results, long retaining time of results, and user-friendliness.

The invention discloses an automatic control system and an automatic control method of a direct current electric arc furnace. The automatic control system of the direct current electric arc furnace comprises a direct current electric arc furnace body, an in-furnace infrared temperature measuring device, a cathode electrode, an electrode lifting device, an in-furnace temperature control sensor, an electrical power device, a voltage control sensor, an anode electrode, a discharge temperature control sensor, a discharge infrared temperature measuring device and a feed control device. The automatic control method of the direct current electric arc furnace includes: collecting voltage values between the cathode electrode and the anode electrode in the direct current electric arc furnace body, and calculating difference values between the voltage values and a preset voltage value so as to control the electrode lifting device to rise and fall for adjusting the voltage values; collecting in-furnace temperature, and calculating different values between the in-furnace temperature and preset temperature so as to control current magnitude of a direct current power source; collecting temperature of material flowing out of a discharge port, and calculating difference values between the temperature of the material and preset temperature so as to control feed amount. The automatic control system and the automatic control method of the direct current electric arc furnace use different control parameters for amending voltage, electric arc, feeding speed and the like, avoid cross influence of the above factors, and achieve full automatic control for the direct current electric arc furnace.

The invention discloses a detection device for a micro-fluidic biologic chip and a preparation method of the detection device. The detection device mainly comprises a groove plate, a bottom plate, a groove and a notch, wherein detection points are arranged in the groove. The detection device is easy to prepare and use, and is suitable for large-scale production and application, and the detection result is stable and reliable.

The invention provides a silicon wafer classifying and collecting method. The silicon wafer classifying and collecting method comprises the steps that silicon wafers are conveyed by a first conveying device to a detection station; the silicon wafers are detected at the detection station, and the silicon wafers are divided into a first type of silicon wafers of which the detection result meets a predetermined standard and a second type of silicon wafers of which the detection result does not meet the predetermined standard according to the detection result; the first type of silicon wafers are conveyed by the first conveying device to a first wafer receiving station so as to receive the first type of silicon wafers; the second type of silicon wafers are transferred from the first conveying device to a second conveying device located on the side of the first conveying device; and the second type of silicon wafers are conveyed by the second conveying device to a second wafer receiving station so as to receive the second type of silicon wafers. According to the silicon wafer classifying and collecting method, the second type of silicon wafers are reversed to the second conveying device located on the side of the first conveying device to be collected, the first type of silicon wafers are directly collected on the first conveying device, therefore, the collecting processes of the two types of silicon wafers do not interfere with each other, and finally the overall collecting efficiency is improved.

The invention relates to an atmospheric aerosol smoke system for simulating open burning of biomass and measuring number concentration of particulate matters. The system comprises a burning device forsimulating the open burning of the biomass, an aerosol smoke box for simulating a process of discharging atmospheric pollutants into the atmosphere, and a particular matter particle size measuring device, which are connected in sequence; the atmospheric aerosol smoke system has three functions at the same time, and stimulates the process of discharging the atmospheric pollutants in the open burning of the biomass accurately and really; the physical and chemical reactions of the atmospheric pollutants generated in open burning of crop straws at all heights of the troposphere and even the stratosphere can be simulated in an artificially controllable and repeatable manner, and meanwhile, the influence of complex weather, terrains and other factors in the actual environment is eliminated; andthe number concentrations of atmospheric particulate matters with different particle sizes discharged in the open burning of the biomass can be accurately reflected.

The invention relates to the technical field of culture and analysis of microorganisms, and discloses a high-throughput algae culture and test method. The method comprises the following steps: (S1) culturing algae in a high-throughput algae culture device; (2) caring out automatic sampling by an automatic sampling device from the high-throughput algae culture system and conveying the obtained sample to an analysis and detection device for detection; and (3) according to a test result of the analysis and detection device in the step (2), regulating and controlling culture conditions through a culture parameter feedback regulation device. According to the method, high-throughput and intelligent algae culture, rapid and automatic sampling detection, automatic sampling analysis in the cultureprocess and feedback control over culture conditions can be achieved.

The invention provides a detection mechanism used for detecting a tested edge of a to-be-tested silicon at a detection station, the tested edge includes two opposite first surfaces, a second surface and an end surface connecting the first surfaces and the second surface. The detection mechanism includes a surface light source, an end surface light source, a surface reflection mechanism, an end surface reflection mechanism and a detection camera, wherein the surface light source is configured to illuminate surface illumination light to at least one surface of the tested edge, the surface reflection mechanism is configured to reflect the surface illumination light reflected by the at least one surface to the detection camera, the end surface reflection mechanism is configured to reflect theend surface illumination light emitted by the end surface light source to an end surface of the tested edge, and the end surface illumination light is reflected by the end surface of the tested edge to the detection camera. The detection mechanism is advantaged in that the end surface of the tested edge of the to-be-tested silicon and at least one surface can be detected, and thereby detection efficiency is improved, and detection cost is reduced.

The invention discloses a wafer transfer method and a wafer transfer platform. The wafer transfer method comprises the following steps: S1, a first manipulator conveys a wafer in a front open type wafer conveying box into a transition bearing mechanism of a transition chamber; S2, a second manipulator sends the wafer in the transition chamber to a process bearing mechanism in the process chamber for processing; s3, the second manipulator sends the wafer processed by the process chamber into a vacuum bearing mechanism of the vacuum chamber; s4, the steps from S1 to S3 are repeated until the wafers in the open wafer transfer box are all processed by the process chamber and then placed in the vacuum chamber; s5, the processed wafers in the vacuum chamber are sequentially conveyed into the front-open type wafer conveying box through the first manipulator. The processed wafers and the unprocessed wafers are separated, the cross influence of the processed wafers and the unprocessed wafers is avoided, it is ensured that the processed wafers are not polluted, the yield of the wafers is increased, high practicability and popularization value are achieved, the improvement cost is low, and the actual process requirements are met.

The invention discloses a movable light-guide fiber display which structurally comprises a handle, a control switch, a movable box and a display screen. The movable box is provided with a light sourceplate, a fixed plate, a scaling mechanism and a transparent plate. A pressure block in a blocking mechanism is scaled through a controller in a telescopic device, when a telescopic mechanism is retracted, a bent rod is stressed and bent inwards to block light, so that the irradiation range in an irradiation hole is prevented from being too dense, the intensity of the light is adjusted, the diffraction phenomenon caused by too dense irradiation is avoided, and the visual effect at the edge of the pattern is prevented from being influenced by light cross; and the refractivity of a light sourceemitted by a bent mirror is controlled, so that light rays are in a good uniform scattering state, the light rays are prevented from forming a cross phenomenon, the light rays enter a reverse transparent mirror in a scattering structure and are refracted and diffused from rhombic holes after being focused, the light rays reach a uniform state, light sources are scattered orderly, and the problem of non-uniform brightness caused by scattering deviation is solved.