103results about How to "Accurate and effective measurement" patented technology

The invention relates to the text analysis field, particularly to a semantic characteristic-based text semantic similarity analysis method. According to the technical scheme, the similarity degree between texts is analyzed more accurately and effectively by calculation based on semantic relations of internal words of the texts. According to the method, shallow analysis on association relation between texts and between lexical items is performed through singular value decomposition; a lexical item-theme set is constructed by a bayesian network; the semantic similarity between the lexical items is calculated by mutual information and context; and finally, the text similarity is calculated through a graph structure. By adoption of the text semantic similarity analysis method, the semantic relation between texts can be measured and recognized more accurately and effectively.

The invention belongs to the technical field of medical optometry equipment and especially relates to an intelligent portable hand-held vision screening instrument and an optometry method. The instrument comprises an optometry system, a camera shooting system, an integral control system and a wireless communication system which are connected to a central processing unit, wherein the optometry system is composed of a light source, a diaphragm and a lens and is used for emission of the light source, diaphragm isolation and lens transmission; functions of distance and temperature measurement are achieved through combination of an ultrasonic ranging and a temperature sensor; the optometry system can shoot eye images by an infrared lens and a visible light lens; the integral control system executes different modes including a preview mode, a camera shooting mode and a checking mode; the wireless communication system carries out card reading functions of a social insurance card and a medical service card as well as wireless data transmission; and the central processing unit carries out collection and processing of data, image recognition, gray analysis and diopter computation. The intelligent portable hand-held vision screening instrument is connected to an intelligent medical cloud platform by a wireless communication system.

The invention discloses measuring equipment and a measuring method for leakage currents of a high-voltage holding test of security equipment. The measuring equipment for the leakage currents of the high-voltage holding test of the security equipment comprises a mobile testing platform and a modular current detection alarm device. The modular current detection alarm device is mounted on the mobile testing platform which comprises an insulating support, a high-voltage end, a grounding end and a guide rail ruler. The modular current detection alarm device is in series connection with the grounding end. The measuring method for the leakage currents of the high-voltage holding test of the security equipment comprises the following steps of drawing an equipment wiring diagram, choosing the modular current detection alarm device, manufacturing the mobile testing platform, debugging and mounting and operating measurement. The measuring equipment and the measuring method for the leakage currents of the high-voltage holding test of the security equipment can effectively and accurately measure the leakage currents on the surface of the security equipment, solve the problem that the security equipment is difficult to judge to be qualified or not, and guarantee the personal safety of an operator and the safe and stable operation of a power grid.

The invention discloses a micro-resistance measurement equipment and measurement method. The resistance measurement equipment comprises a slide platform, a control device and a micro-resistance tester which is arranged on the slide platform and can move along three directions of X,Y and Z axes. One set or multiple sets of probes are arranged on the micro-resistance tester. According to the micro-resistance measurement equipment and measurement method, resistance value measurement can be rapidly, effectively and accurately performed on products, qualified and unqualified products can be distinguished, operation complexity of workers can be reduced and detection efficiency can be enhanced.

The invention provides a positioning system for an aeromotor installing vehicle. The positioning system comprises two multistage telescopic supporting arms, a clamping board, a clamping board bottom seat and a pair of measuring arms; according to the positioning system, the design of the multistage telescopic supporting arms are adopted, so that the operating distance of the positioning system is improved effectively, the positioning function can be played in a long distance, and efficient operation is sustained all the time during the process that the installing vehicle moves to the final operating position, so that the positioning system for the aeromotor installing vehicle is one sustaining positioning system, and the accuracy of the system is improved with the decrease of the distance between the installing vehicle and an engine compartment of the aeromotor. A positional method studied and designed according to the positioning system has the advantages that accurate and efficient measuring and control can be conducted on the angular deviation and the lateral displacement deviation, and the measuring and control over the lateral displacement deviation adopt a combining mode of coarse positioning and fine positioning, so that the positional method is accurate, fast and efficient.

The invention relates to a cross-media similarity measure method and search method based on a local association graph; the method comprises the following steps: building a cross-media data set containing various media types, segmenting all data, thus obtaining local segments while reserving the whole data; extracting characteristic vectors from whole data and local segments of each media type in the cross-media data set; using a cross-media unification characteristic expression method to train various media types through the whole data in a training set so as to obtain a unification characteristic mapping matrix, and mapping the whole data and local segments of each media type to the unification space; building the local association graph in the unification space, and calculating media data similarity. The cross-media similarity measure method and search method can measure cross-media data similarity, can use local information to dig fine grain cross-media association, can use whole information to effectively block local information noises, thus optimizing cross-media similarity measure exhaustive and accuracy.

The invention discloses a convenient channel sludge thickness measuring instrument, so as to solve the problems that the thickness of sludge in a channel can not be measured accurately in the prior art, and thus, the amount of sludge in the channel can not be accurately measured later, measured data can only be read online and errors of the read data are increased. The convenient channel sludge thickness measuring instrument comprises a measuring sleeve, a steel measuring ruler and a positioning ring, wherein the measuring sleeve is composed of an upper wide-diameter section and a lower narrow-diameter section; the measuring ruler is composed of an upper steel column section and a lower steel drill section; a measuring scale is arranged on the upper steel column section; the top part of the upper wide-diameter section is provided with a measuring scale pointer; a gradienter is fixed on the measuring sleeve; and the upper part of the measuring sleeve is provided with a positioning threaded hole, a positioning bolt and a rotating handle. The convenient channel sludge thickness measuring instrument has the advantages that the structure is simple; the design is scientific and reasonable; the use is convenient, the thickness of sludge in the channel can be measured accurately and effectively; accurate original data are provided for later channel sludge amount measurement; the data after measurement are convenient to read and have small errors; and carrying and use are facilitated.

The present invention provides a biochemical incubator, which comprises a thermal insulation box, wherein an electrical control system is positioned on the upper portion of the box, a heat and moisture treatment system is positioned just above an experiment bin, a circulating fan connected with the heat and moisture treatment system is positioned just above the top portion of the experiment bin, a temperature and humidity sensor is arranged on the inner side wall of the experiment bin, the experiment bin is provided with experiment bin separation plates, a circulating ventilation channel is formed between the inner wall of the box and the experiment bin separation plates, and the lower portion of the experiment bin is provided with experiment bin ventilation separation plates. According to the present invention, the biochemical incubator has functions of cooling, heating, dehumidification, humidification, ventilation, and the like, and can achieve precise control on the temperature and the humidity, wherein the cooling, the heating and the dehumidification are achieved through the semiconductor cooler; and with the experiment box, the indoor temperature and the indoor humidity can be controlled to near the set value, and the control precision and the control function have the high requirements.

The invention discloses a mining method for frequency modulation capability of an extraction type cogeneration unit based on building thermal inertia, comprising the following concrete steps: step 1,collecting operation parameters of the combined system for an electric heating system including a CHP unit; 2, establish a building hot standby measurement index for excavating that frequency modulation capability of the extraction-type CHP unit; 3, establish a decomposition and coordination dispatching model of an electric-heating combine system for mining frequency modulation capability of a CHPunit; 4, solving that decomposition and coordination dispatching model of the electrothermal combine system established in the step 3, and obtaining the values of each operation variable under the condition that the objective function is optimal; 5, according to the solution result obtained in the step 4, analyzing the mining effect of the frequency modulation capability of the electrothermal combined system based on the building thermal inertia; For the stable development of various new energy represented by wind power in the above-mentioned areas to provide a good foundation for the security and stability of the power system, to solve the problem of new energy consumption, improve its consumption situation.

The present invention relates to the field of generator rotor winding insulation measurement, and specifically, a method for measuring the insulating state of a generator rotor winding to an iron core and a shaft system. The method includes the steps as follows: establishing a measuring power source of the generator rotor winding to an insulation object; inputting the measuring power source with positive-negative intervals through an electronic switch; measuring the leak current of a rotor to the insulating object under the normal circumstance; setting a safe threshold value according to the leak current; identifying the detection value and the preset insulating resistance value when the monitored current exceeds the preset threshold value; comparing the detection value with the preset insulating resistance value through a plurality of interval measuring values; and emitting the alarm (I section high resistance) instruction or shut down (II section low resistance) instruction when the plurality of interval measuring values exceed the preset value. According to the invention, the generator rotor is protected.

The invention discloses a self-calibration externally bonded ultrasonic liquid level switch measurement system which comprises an externally bonded ultrasonic liquid level switch host, a calibration probe, a high level measurement probe and a low level measurement probe, wherein the calibration probe is mounted in an empty liquid position inaccessible for a liquid level of a tank body or outside a liquid position without emptying of the liquid level; the high level measurement probe is mounted at a high level alarm point at the upper part of the outside of the tank body; the low level measurement probe is mounted at a low level alarm point at the lower part of the outside of the tank body; the high level measurement probe and the low level measurement probe are connected with the externally bonded ultrasonic liquid level switch host. The measurement system judges whether liquid exists by change of ratios of a signal of the calibration probe to signals of the high level measurement probe and the low level measurement probe; influences of material, thickness, temperature and coupling layer loss on the signals can be effectively removed; more stable and reliable measurement is realized; frequent calibration of a set value is not required; the mounting and debugging workload is low; the efficiency is high; frequent debugging is not required.

The invention provides a multichannel pulse acquisition system. The multichannel pulse acquisition system comprises a signal acquisition unit, a signal processing unit and a signal integration unit, the signal acquisition unit is used for acquiring multiple paths of pulse wave signals, and the signal processing unit is used for denoising the multiple paths of pulse wave signals and screening the denoised multiple paths of pulse wave signals to obtain a single pulse wave signal scatter diagram; and the signal integration unit is used for performing curve fitting on the single pulse wave signal scatter diagram to obtain a pulse wave signal curve. Measurement errors caused by pulse wave signal collection through a single collection channel are avoided, and more accurate and effective pulse wave signals can be measured. Correspondingly, the invention further provides a multi-channel pulse acquisition method.

The present invention discloses a device for measuring electric conductivity, and real-time monitoring electrical parameter change in electric osmosis process in polluted soil. The device comprises a computer, a data collection system, an organic glass cylinder, a program controlled power box, a TDR 100 tester, a temperature detection module, a voltage detection module, a current detection module, an LAQUA electric conductivity tester, an electronic scale and a filtering collection bottle, wherein a metal tube is arranged on the axle wire of the organic glass cylinder to be used as a negative pole, the inner wall of the organic glass cylinder is wrapped with EKG geotechnical cloth to be used as a positive pole; small holes are formed in the inner wall of the metal tube; the outer layer of the metal tube is wrapped with geotechnical cloth; electric osmosis drainage water enters the metal tube after passing through the geotechnical cloth and enters the filtering collection bottle by a water drainage guide pipe after passing thorough drain holes in the bottom of the organic glass cylinder; three temperature sensors are inserted into negative pole soil, positive pole soil and soil between the negative pole soil and the positive pole soil. In the device, the computer is used for performing unified management on working states of node devices under the date collection system, so that the change rule of electrical parameters can be studied in a highly effective manner, and the measurement of electric conductivity is relatively accurate and effective.

The invention relates to a nondestructive measuring instrument for the thickness of a covering rubber layer of a steel wire lining conveyer belt and a measuring method of the nondestructive measuring instrument. The nondestructive measuring instrument for the thickness of the covering rubber layer of the steel wire lining conveyer belt comprises a base, a power source, an adjusting lead screw, a stand column, an induction limiting stopper and a displacement measurer used for measuring the moving distance of the induction limiting stopper. The stand column is vertically arranged on the base, the adjusting lead screw is connected with a threaded hole in the stand column, the lower end of the adjusting lead screw is fixedly connected with the induction limiting stopper through a connecting rod, the induction limiting stopper is suspended on the side edge of the base and electrically connected with the power source, and the displacement measurer is fixedly connected with the stand column through a fixing frame. According to the measuring instrument, after a probe of the induction limiting stopper makes contact with the working face of the steel wire lining conveyer belt and induces steel wires, the adjusting lead screw is rotated to make the probe of the induction limiting stopper slowly move upwards until the probe does not induce the steel wires, the moving distance of the probe can be known through the displacement measurer, and the thickness of the covering rubber layer is known through calculation.

The invention relates to the technical field of thermodetectors, and in particular relates to a wireless charging infrared thermodetector protection device. The device comprises a supporting plate, a supporting mechanism which is used for fixing a thermodetector body and is arranged on the outer side of the supporting plate, and an adjusting mechanism which is arranged on the outer side of the supporting mechanism; the adjusting mechanism comprises a lifting assembly which is arranged on the outer side of the supporting mechanism and connected with the supporting mechanism by rotating a rotating assembly, an air blowing assembly which is arranged on the inner side of the lifting assembly, and a connecting mechanism which is used for connecting the lifting assembly and the air blowing assembly and matches the air blowing assembly to drive the lifting assembly and the rotating assembly so that the position of the thermodetector body located in the supporting mechanism can be adjusted. According to the invention, the height and the angle of the thermodetector body can be adjusted, and the thermodetector body located in the supporting mechanism can be cooled through the air blowing assembly.

The invention discloses a fiber laser output beam measuring device and a using method thereof, and belongs to the technical field of fiber laser measurement. The device comprises a visible light diode, a near-infrared signal light source, a pump laser, an optical fiber beam combiner, a pump beam combiner, a gain optical fiber and an optical fiber collimator, wherein the optical fiber beam combinercan combine a visible light beam emitted by the visible light diode and a near-infrared signal light beam emitted by the near-infrared signal light source into a first laser beam. A second laser cancombine the first laser beam and a pump laser beam emitted by the optical fiber beam combiner and the pump laser into a second laser beam, and the near-infrared signal light beam and the visible lightbeam pass through the gain optical fiber and then the optical fiber collimator outputs the near-infrared signal light beam and the visible light beam which are parallel to each other. The fiber laseroutput beam measuring device improves the problem that the output light beam of the laser cannot be accurately and effectively measured in the prior art.

The invention discloses a method and device for measuring the sugar content of fruits, computer equipment and a storage medium, relates to the technical field of sugar content measurement, and aims toimprove the efficiency of measuring the sugar content of the fruits and avoid damage to the fruits to be measured in sugar content measurement. According to the main technical scheme, the method comprises the steps: obtaining fruit picture data of a to-be-detected fruit; inputting the fruit picture data into a fruit sugar estimation model to obtain sugar data corresponding to the fruit picture data, wherein the sugar estimation model is obtained by training according to fruit sample picture data and corresponding sugar content; and determining the sugar content of the fruit to be detected according to the sugar data corresponding to the fruit picture data.

The invention provides a ventilation system filtering performance testing device and method for a railway vehicle. The ventilation system filtering performance testing device for the railway vehicle comprises a spraying assembly and a testing assembly, wherein the spraying assembly is used for spraying an object to be filtered; the to-be-tested piece is arranged in the test air duct assembly, and the spraying assembly is communicated with the test air duct assembly; the first filter is arranged in the test air duct assembly; the cooling air simulation assembly is communicated with the test air duct assembly, and cooling air generated by the cooling air simulation assembly penetrates through the filtering surface of the to-be-tested piece; the wind resistance measuring assembly is used for measuring the wind volume and the resistance of the to-be-tested piece; the weighing assembly is used for weighing the weight of the to-be-filtered object and the weight of the to-be-tested piece before and after filtering. The problem that the filtering performance of the ventilation system of the railway vehicle cannot be accurately measured in the prior art is solved.