338results about How to "The result is accurate and reliable" patented technology

A location system is disclosed for commercial wireless telecommunication infrastructures. The system is an end-to-end solution having one or more location centers for outputting requested locations of commercially available handsets or mobile stations (MS) based on, e.g., CDMA, AMPS, NAMPS or TDMA communication standards, for processing both local MS location requests and more global MS location requests via, e.g., Internet communication between a distributed network of location centers. The system uses a plurality of MS locating technologies including those based on: (1) two-way TOA and TDOA; (2) pattern recognition; (3) distributed antenna provisioning; and (4) supplemental information from various types of very low cost non-infrastructure base stations for communicating via a typical commercial wireless base station infrastructure or a public telephone switching network. Accordingly, the traditional MS location difficulties, such as multipath, poor location accuracy and poor coverage are alleviated via such technologies in combination with strategies for: (a) automatically adapting and calibrating system performance according to environmental and geographical changes; (b) automatically capturing location signal data for continual enhancement of a self-maintaining historical data base retaining predictive location signal data; (c) evaluating MS locations according to both heuristics and constraints related to, e.g., terrain, MS velocity and MS path extrapolation from tracking and (d) adjusting likely MS locations adaptively and statistically so that the system becomes progressively more comprehensive and accurate. Further, the system can be modularly configured for use in location signaling environments ranging from urban, dense urban, suburban, rural, mountain to low traffic or isolated roadways. Accordingly, the system is useful for 911 emergency calls, tracking, routing, people and animal location including applications for confinement to and exclusion from certain areas.

Apparatus and methods are provided for analyzing surface characteristics of a test object using broadband scanning interferometry. Test objects amenable to these apparatus and methods include but are not limited to semiconductor wafers, semiconductor devices, metallic surfaces, and the like. An interferometry system is used to obtain an interferometry signal and related to data embodied in the signal representative of the test object surface. This signal and / or data is used to construct an n-dimensional function that includes an independent frequency variable and an independent time variable, and / or an n-dimensional function that includes an independent scale variable and an independent time variable, and / or a multi-domain function. These functions are compared with various models to obtain a best match that is then used to characterize the test object surface.

The invention relates to a rock sample detection and data acquisition system. The system can realize elastic parameter test of a rock sample in the state of gas adsorption; in the system, a three-shaft pressure cabin is connected with a gas supply and metering control device for absorbing samples in the cabin and accurately metering absorption quantity, moreover, an ultrasonic transducer is installed on a cap of the (high) pressure cabin and integrated with an ultrasonic wave transmitting / receiving device so that the test of elastic parameters of methane absorption on coal can be realized truly. The system can automatically and continuously test in the processes of gas absorption and gas enrichment, thereby ensuring a consistent test environment, acquiring an absorption quantity and elastic parameter relation curve, improving test accuracy and efficiency and saving test time and cost. The rock sample detection and data acquisition system integrates methane enrichment mechanism simulation and rock physical property test, can be applied to seismic prospecting method research on coalbed methane and shale gas, mine advanced detection, coal mine safety research and the like.

A method and apparatus for analyzing a surface of a test object employs apparatus with a scanning interferometry system which generates a windowed interferometric signal from the surface of a test object to characterize the surface of the test object.

A device and method for discovering, identification and monitoring of mechanical flaws in metallic structures is disclosed, based on magneto-graphic / magnetic tomography technique to identify stress-related defects. The technique is specifically optimized for extended, not-accessible underground and underwater metallic structures quality control, emergency alarms as well as timeline planning for structural repairs and maintenance work. Examples of the technique implementation include pipes for oil and gas industry, detection of flaws in rolled products in metallurgical industry, welding quality of heavy duty equipment such as ships, reservoirs, etc. It is especially important for loaded constructions, such as pressured pipes, infrastructure maintenance, nuclear power plant monitoring, bridges, corrosion prevention and environment protection.

The invention concerns nondestructive ultrasonic test equipment for detection and visualization of damage to and in structural components through reflections of introduced ultrasound waves at inhomogeneities in the test area, consisting of primarily piezo sensors, which, depending on how they are driven, can function as transmitter or as receiver for ultrasound waves, and which are permanently attached, for example by gluing, to the damage-critical areas of structural components to be tested and / or monitored, and also of a control device, which is connected to the relevant sensor by electrically conducting wires, so that the received reflected ultrasound waves can be used as imaging data in a suitable device (analysis unit), in order to finally be compared with expected ultrasound images to evaluate any damage that may have occurred. The essence of the invention consists in that the control unit—for example a digital FPGA (field programmable gate array)—is connected to its associated sensor with almost no separation. Another essential inventive concept is to be seen in that the sensors are designed to be two-dimensional or multidimensional such that they can also be used one-dimensionally as needed.

A remote sensing image target detection method based on a deep neural network is provided. The method comprises: obtaining a training sample and carrying out a scaling preprocessing operation on the training sample; carrying out multiple types of labeling operations on a training sample image containing a remote sensing target and a remote sensing background in the preprocessed training sample; based on the maximum number of iterations, carrying out pre-training and fine-tuning operations on a selected deep convolutional neural network model to obtain a fine-tuned deep convolutional neural network model; processing a full-connected layer of the fine-tuned deep convolutional neural network model to obtain a fine-tuned deep full convolutional network model; and detecting the remote-sensing image target based on the fine-tuned deep convolutional neural network model and the fine-tuned deep full convolutional network model. The method has the advantages of a high detection speed and high detection accuracy, and can be widely used in the fields such as target detection, target tracking, intelligent navigation, urban planning and the like.

The invention discloses a method for identifying and detecting the fire flame in a big space, including: pretreating the input video streams, performing movement detection for the video streams to obtain the movement pixel, performing color detection for the video streams to obtain the pixel with the flame characteristic color, performing frequency domain analysis for all the pixels according with the movement detection and the color detection flame characteristic, searching the communicating areas formed by mutually connecting the pixels according with the same characteristic, calculating the circumferences and the areas of the obtained communicating areas to perform the shape analysis, performing the area change variable analysis for each communicating area, at last judging whether the fire happens. In the method, the real flame in the big space is distinguished from the flashy car light, so that the device is not only for the flame detection in the tunnel, but also used in the big-space fire flame detecting sites such as a gymnasium, a museum, a warehouse and the like.

The invention relates to a tropical cyclone full path simulation method facing disaster risk assessment. The tropical cyclone full path simulation method comprises concrete steps: a first step of establishing a start point model, and taking samples to simulate yearly occurrence frequency of tropical cyclones and generate start point information; a second step of establishing a marching model, and simulating the moving speed and orientation of the tropical cyclones to form a tropical cyclone path; a third step of establishing strength models including an ocean surface strength development model and a land strength attenuation model, and selecting the corresponding strength model in dependence on the latitude and longitude of the next point in the tropical cyclone path; a fourth step of examining the path simulation result, and carrying out statistical result examination and statistical rule analysis on the randomly-generated tropical cyclone path and the strength large sample; and a fifth step of establishing a typhoon wind field engineering model and a boundary layer model, calibrating wind field model key parameters, calculating the typhoon wind speed on the simulated point, and carrying out typhoon risk disaster assessment. The tropical cyclone full path simulation method facing disaster risk assessment can achieve refined evaluation, and is accurate and reliable in result, high in calculating efficiency and wide in application scope.

The invention discloses a multi-phase permeameter and a rock permeability determination method. The multi-phase permeameter comprises an injection system, a cooling system, a model system, a metering system, an automatic control system, a pressure return system, a vacuum pumping system and a data acquisition and processing system, wherein the injection system is used for injecting carbon dioxide and liquid; the cooling system, the automatic control system, the pressure return system, the vacuum pumping system and the model system are used for simulating formation conditions; and the metering system and the data acquiring and processing system are used for date statistic measurement. The method comprises experiments of vacuum pumping, core saturation and displacement, wherein injection rate and injection pressure are changed by an injection pump, so that parameters required for the permeation experiment can be acquired, and salt precipitation capacity generated by desiccation effect can be measured. According to the invention, the operation is simple, automatic control, acquisition and handling by using a computer are realized, and limitations and defects of conventional experimental apparatuses and methods can be overcome.

The invention concerns a method of providing a geographical localisation service within a wireless local area network having two or more wireless network access points. The terminal of a user is located at a location of a plurality of locations. The terminal measures at least two times the strength of signals received from two or more wireless network access points. It chooses the strongest signals of the several measurements as valid signal strengths and triggers a localisation server to compare the valid signal strengths to an intensity map stored in a data base. The location from the intensity map which best matches the valid signal strengths is provided as location of the terminal.

An arrangement for and a method of automatically selecting substrate alignment marks on a substrate in a lithographic apparatus or overlay metrology targets in an overlay metrology apparatus. The apparatus has a processor and a memory connected to the processor. The memory stores locations of one or more sets of substrate alignment marks or overlay metrology targets available for selection and selection rules to select suitable substrate alignment marks or overlay metrology targets from this at least one set. The selection rules are based on experimental or theoretical knowledge about which substrate alignment mark or overlay metrology targets locations are optimal in dependence on one or more selection criteria.

The invention discloses a device and method for determination of a coal rock isothermal desorption curve under saturated water condition. The device comprises a gas injection and vacuum pumping control subsystem, a water injection control subsystem, a true-triaxial rock core holding and control subsystem, and a dehydration metering subsystem. The gas injection pipe hole and water injection pipe hole of the true-triaxial rock core holding and control subsystem are respectively connected to the gas injection and vacuum pumping control subsystem and the water injection control subsystem, and the outlet end of the true-triaxial rock core holding and control subsystem is connected to the dehydration unit inlet end of the dehydration metering subsystem. The dehydration metering subsystem realizes respective metering of accumulative discharged gas and water mass. The method for determination of the coal rock isothermal desorption curve under saturated water condition is an experimental method carried out based on the device. Through true reappearance of the ground stress field, groundwater pressure field, temperature field and other underground environments where the coal rock is located, coal-seam gas desorption characteristic test is carried out, the device has a clear structure, the data acquisition is reliable, and the result is accurate and credible.

The invention relates to a fine simulation method for a wind spectrum model. The method is to solve the problem of large error between a fitting wind spectrum model and an actually-measured wind spectrum model so as to more accurately simulate the wind spectrum model adopted in the wind resistance analysis of an engineering structure. Firstly, mass actually-measured data of wind property is subjected to power spectrum analysis to obtain the actually-measured wind spectrum model; secondly, an inflection point and the position of the actually-measured wind spectrum model are found out in a frequency domain; according to the inflection point, the wind spectrum model is divided into sections in the frequency domain; and finally, each section of the wind spectrum model is subjected to fitting respectively. Obviously, the wind spectrum model obtained by subsection fitting is more inosculated with the actually-measured wind spectrum; wind load born by an obtained structural object also more meets actual situation; therefore, the wind spectrum model can be more accurately and reliably applied to wind resistance design of the engineering structure.

The invention discloses a method and a device for measuring gas adsorption quantity and adsorption deformation of coal rock under a stress condition. The method comprises the following steps of: processing the coal rock into a cylindrical sample; wrapping the cylindrical sample, a gasket and the base of a sample tank through a sealing material; vacuumizing; filling gas in a gas injection meteringpump; opening an ambient pressure control metering pump, injecting ambient pressure liquid in the tank, and recording volume and pressure of liquid in the ambient pressure control metering pump; opening the gas injection metering pump; injecting gas; recording volume and pressure of gas in the gas injection metering pump; and calculating the adsorption quantity and the adsorption deformation. A sub-system is connected with a valve in a fluid injection and control sub-system. The sub-system is connected with a fluid passage hole in a tank sub-system through a stainless steel pipe. The valve inthe sub-system is connected with a four-way in the fluid injection and control sub-system. The ambient pressure control metering pump in the fluid injection and control sub-system is respectively connected with an acquisition card in a data acquisition sub-system through a cable. The method and device disclosed by the invention has the advantages of simple principle, clear structure, simple and convenient operation and accurate and credible result.

The invention relates to a method for adjusting the position and the size of a projection picture with the full degree of freedom. The method comprises the steps of projecting a standard testing image through digital light process (DLP); aiming at a projection screen and shooting the projection picture through CCD; acquiring the adjustment amount of a zoom adjustment to conduct zoom adjustment by processing of shot data by a computer; and sequentially using rotating adjustment, vertical inclination adjustment, horizontal displacement adjustment and vertical displacement adjustment as an adjustment object, loop executing of the following steps and completing the adjustment to the projection picture. The CCD is directed at the projection screen to shoot the projection picture, analyzing and processing are conducted on the shot data by using an approximation algorithm through the computer to obtain the adjustment amount and the adjustment direction corresponding to the adjustment object, and the computer automatically controls a corresponding knob to conduct adjustment. By means of the method for adjusting the position and the size of the projection picture with the full degree of freedom, the computer automatically controls the five shafts of six shafts to adjust the knob, so that the relative position of a light machine and the projection screen can be adjusted accurately, the projection image can be fully displayed on the screen inerrably, manual operation is needless, and time and labor can be saved.

The invention discloses a meshing frequency and spectrum correction technology based wind power gear box order tracking method. The meshing frequency and spectrum correction technology based wind power gear box order tracking method comprises performing discrete sampling on vibration acceleration signals on the surface of a box body of a fan planet gear box to obtain a non-stationary time domain sequence xn (t); adding a hanning window w (t) to intercept a section of xn (t) and performing FFT (Fast Fourier Transformation) to obtain a power spectrum G (f); performing frequency correction on the meshing frequency fm of a gear box high-speed shaft in the G (f) by a four-point energy centrobaric correction method to obtain an instantaneous meshing frequency which is expressed by the formula; moving window functions in turn and extracting the formula by the energy centrobaric method repeatedly to obtain a meshing frequency curve which is expressed by the formula; obtaining a high-speed shaft rotating frequency curve according to the relation between the meshing frequency and the rotating frequency, wherein the high-speed shaft rotating frequency curve is expressed by the formula; combining with the formula to performing equal-angle resampling on the xn (t) to obtain a smooth angle domain sequence theta n (t); performing correction on the order time and the amplitude by a window length moving method and the energy centrobaric method to obtain an order tracking curves Oi (t). The meshing frequency and spectrum correction technology based wind power gear box order tracking method is good in generality, high in anti-noise performance and accurate and reliable and the problems that a method for measuring the fan rotating speed through a tachometer is difficult in installation, high in cost, poor in accuracy and the like can be avoided.

The invention discloses an evaluation method for tight oil well reserves, and relates to the technical field of oil and gas exploration and development. The problem that the prediction precision of the tight oil well reserves is low is mainly solved. Geological factors of a tight oil well region and the exploration states of tight oil wells are utilized for grading different tight oil wells to obtain the abundance of each tight oil well in each grade of tight oil wells, through calculating the abundance planar distribution, the economic coefficient of each tight oil well in each grade of tight oil wells is obtained, then through the economic coefficients, all the grades of tight oil wells are divided into different types, and on the basis of the area of each type tight oil well in each grade of tight oil wells and the abundance of each type tight oil well in each grade of tight oil wells, the reserves of all the types of tight oil wells in all the grades of tight oil wells are finally obtained. The evaluation method for the tight oil well reserves effectively improves the prediction precision of the tight oil reserves.

The invention discloses a vision measurement and calibration-based AGV automatic posture adjusting and positioning method. The method comprises the following steps: (1) calibrating AGV according to anindustrial CCD camera, a calibrating plate, displacement sensors, a laser tracker and a telescopic column in an AGV automatic posture adjusting system to obtain relation between a camera coordinate system and an AGV coordinate system (the formula is as shown in the description); (2) acquiring the current coordinates of the centers of two big round holes in the calibrating plate under the AGV coordinate system by using the relation (the formula is as shown in the description), calculating according to the current positions and postures of the four displacement sensors and the centers of the two big round holes as well as the target position and posture to obtain a transformation matrix to obtain the current position and posture of the AGV; (3) planning the posture adjusting route accordingto the current position and posture of the AGV, the target position and posture of the AGV and the current coordinates of the 6 supporting positioners under the AGV coordinate system; and (4) performing posture adjustment on the AGV according to the posture adjusting route obtained by planning. With the method, the AGV is subjected to posture adjustment and positioning to a proper position at thetransferring position and the automatic and rapid transferring function is achieved.

The invention discloses an instrument for monitoring gas emission quantity in a roadway. The instrument mainly comprises a data processing module, a gas concentration sensor, a wind speed sensor, a signal conditioning circuit, an A / D (Analog / Digital) converter, a digital keyboard, a liquid crystal display and an upper computer, wherein the data processing module is used for receiving and storing a gas concentration signal and a wind speed signal after conversion, calculating to obtain the gas emission quantity, and outputting the gas emission quantity, the gas concentration and the wind speed at the same time; the digital keyboard is used for inputting the cross section information of the roadway; the signal conditioning circuit is used for amplifying and filtering an analogue signal; the A / D converter is used for converting the analogue signal into a corresponding digital signal; and the upper computer is used for acquiring the wind speed, the gas concentration and the gas emission quantity output after the analysis of the data processing module, calculating, processing and displaying a time-varying curved line of the wind speed, the gas concentration and the gas emission quantity of the measured point. The instrument is real-time, quick and accurate, and is particularly suitable for real-time monitoring and warning of burst or emission of a large amount of gases.

The invention provides a full-automatic erythrocyte sedimentation rate analyzer, which comprises a base as well as a blending device and a detecting device mounted on the base, wherein the blending device comprises a sample rack, a sample rack bracket and a rotating device; the sample rack bracket is arranged on the base, and is connected to the sample rack through a rotating shaft; more than one test tube rack is arranged on the sample rack; the rotating device is connected to the rotating shaft, and drives the rotating shaft to rotationally drive the sample rack to turn over up and down; a plurality of holes are arranged in each test tube rack; a fixing device is arranged in the hole, and used for placing and fixing a closed container containing samples; the detecting device comprises a guide device, a driving device, infrared transmitting and receiving devices having the same quantity as that of the test tube racks, and a mounting rack; the driving device drives the mounting rack to move up and down along the guide device; the mounting rack drives the infrared transmitting and receiving devices to move; the closed containers containing the samples are located on moving paths of the infrared transmitting and receiving devices; and infrared rays penetrate through the closed containers to realize detecting.

The invention relates to a method for optically measuring a chassis at a testing station. According to said method, radiation that is reflected by a surface structure of a vehicle, comprising at least one wheel (5) and a surrounding bodywork section, is detected by a measuring device with the aid of appropriate sensors, and at least the wheel plane and the wheel center point are determined by an evaluation of the positional data obtained by means of the detected radiation. To achieve a reliable, precise measurement of the chassis in a simple operation, the surface structure of at least the vehicle bodywork section and at least the wheel is scanned, over its entire surface or at least by any two lines that record both the wheel and the bodywork, using a laser beam (12) that is emitted by the measuring device (10), and at least two surface profiles are obtained from the scanned surface structure as characteristic structures.

The invention provides a local cabin section model for a ship impact resistance test, which is a box body formed by a dual-layer bottom compartment, a ballast compartment and a buoyancy reserve compartment. The shape of the cross section of the box body is as same as the shape of an area with length being 5-7 times of frame space along the length direction of a ship to be tested, width being halfof the width of the ship along the width direction of the ship and height being above 3-5m from the bottom of the ship up to the inner bottom along a vertical direction. The dual-layer bottom compartment is arranged at the bottom. The buoyancy reserve compartment is arranged right above the dual-layer bottom compartment. The ballast compartment consists of two independent watertight compartments,which are respectively arranged at the front and the rear of the dual-layer bottom compartment and the buoyancy reserve compartment. By designing a 1:1 actual-size typical cabin section model to carry out relevant impact resistance tests to research the local strength of a ship structure, the inaccuracy caused by a too simplified structure during a local grillage model test can be effectively remedied, the defects of high expense, difficult implementation and the like of a real ship test can be avoided and the problem that a scale model test is difficult to be converted into a similar test ofa real ship can be solved at the same time.

The invention relates to a method for measuring the sensitivity of an electronic manometer, which belongs to the technical field of electronic measurement. The method comprises the following steps: a pressure value with the measuring pressure of full scale is selected as base measuring pressure; dynamic calibration to the electronic manometer to be calibrated is carried out respectively under normal temperature, high temperature and low temperature environments; under the condition that three sets of standard pressure-measuring systems and the electronic manometer to be calibrated are all effectively calibrated, an average pressure curve measured by the three sets of standard pressure-measuring systems and the rising edge data of the curve measured by the calibrated electronic manometer are utilized to compute to obtain the sensitivity of calibrated electronic manometer. The method of the invention has simple operation, the calibration only needs to be carried out for three times respectively under the normal temperature, the low temperature and the high temperature, the sensitivity coefficient of the electronic manometer under the three temperature environments can be obtained by the calibration of nine times; compared with the existing measuring method, the method of the invention lowers the calibrating period, improves the working efficiency, reduces the testing expenses and the item cost, has precise and reliable result, and is the result of innovative thinking. The method for measuring the sensitivity of the electronic manometer is worthy of being adopted and generalized in the industry.

The invention discloses a shale adsorbed gas content dynamic calculation method based on a Langmuir model. On the basis of experimental analysis and log data, by analyzing the influencing factors of the shale adsorbed gas content, the invention finds the change law of a Langmuir volume and Langmuir pressure along with temperature, pressure and total organic carbon content, and then puts forward the shale adsorbed gas content dynamic calculation method based on the Langmuir model. The method solves the calculation problem of the shale adsorbed gas content, and has high calculation precision.

The invention provides a high-efficiency identification method for salt resistance of cotton germplasms. By utilizing a flower pot soil seedling cultivation method, cotton seedings are cultivated to a three-leaf-and-one-leaflet stage. The materials with normal and consistent growth vigour are selected and subjected to salt stress treatment and clear water treatment with the same volume respectively. The second true leaves are selected, the PSII maximum photochemical efficiencies of the true leaves with different treatments are measured respectively, the relative values are calculated, and brought into the standard equation of salt resistant indexes: D=1.943X-0.882 to calculate the salt resistant indexes and determine the salt resistance, wherein X is for a relative value of a PSII maximum photochemical efficiency and D is for a salt resistant index. The larger the salt resistant index, the stronger the salt resistance. When the method is compared to the prior art, the results of the obtained standard equation of the method are accurate and credible. The measurement method of PSII maximum photochemical efficiencies is simple and fast, can be performed in vivo, does not harm plants, and can ensure normal running of downstream experiments. The measurement time is the cotton seedling stage, so the identification time can be shortened effectively, the efficiency is raised, and the method is suitable for large scale germplasm resource identification.

The invention discloses an advanced prediction method of unfavorable geology of tunnel construction. The method comprises the steps of: surveying the surrounding environment of an advancing tunnel andsketching the geology; surveying the advancing tunnel by a geophysical prospecting method to determine an unfavorable geological section; acquiring and confirming unfavorable geological data of the to-be-advanced tunnel area by an advanced drilling method; and, performing the advanced prediction of the unfavorable geology. The geophysical prospecting method comprises a seismic wave reflection method, an infrared detection method and a geological radar detection method. After surveying the surrounding environment and sketching the geology, the blasthole position, the search angle and the tuning angle are determined; the geology of the total length of the advancing tunnel is surveyed by the seismic wave reflection method, so as to determine the suspicious section of the unfavorable geology;and at the same time, the initial geological data of the suspicious section of the unfavorable geology is acquired by the infrared detection method and the geological radar detection method, so as todetermine the unfavorable geological section. By adoption of the method, the geological range of the advancing tunnel is gradually reduced and the precision is gradually improved, so as to improve the prediction accuracy of the unfavorable geology.

The invention discloses a method for determination of aflatoxin. The invention is innovative by comprising the following steps: 1) weighing a sample, adding an acetonitrile-water extract, stirring for 30 minutes, and then filtering by using qualitative paper, wherein the acetonitrile and water are in the volume ratio of 84:16; 2) determining the sample under the following conditions: chromatographic conditions of a liquid chromatographic column AgilentSBC-18 (25 cm*4.6 mm), a mobile phase of 85 v% of acetonitrile and 15 v% of water, column temperature at 30 DEG C, sample size of 25 mL and flow rate of 1.0 mL / min; 8 mL of extraction filtering liquid to a multifunctional purification column, transferring 2 mL of purification liquid from a collection pool of a purification column into a derivative bottle, blowing nitrogen at 60 DEG C, adding 200 mL of normal hexane and 100 mL of trichloroacetic acid, mixing uniformly for 30 s, derivatizing for 15 min at a 40 DEG C baking oven, drying at room temperature, dissolving with 200 uL of water-acetonitrile solution, mixing uniformly, and sending into an automatic sample introduction bottle, and determining. The detection method provided by the invention is simple and fast in operation and accurate and reliable in results, has little pollution, high security, reduced pollution to operation personnel and the environment, and low detection cost, and is easy for popularization.