1318results about How to "Accurately obtained" patented technology

The invention provides a three-dimensional measuring system, a photographing device, a photographing method, a depth calculation method and a depth calculation device. The photographing device comprises a projection device, a first imaging unit and a second imaging unit, wherein the projection device is used for projecting discrete beams to a photographing area, the discrete beams are modulated to form a plurality of discrete spots in the photographing area, and the discrete spots can be recognized by other discrete spots in a peripheral preset space range; the first imaging unit is used for photographing the photographing area to acquire a first two-dimensional image; the second imaging unit and the first imaging unit have a predetermined relative position relation, and the second imaging unit is used for photographing the photographing area to acquire a second two-dimensional image. Therefore, under the situation of not being subjected to the influence of the ambient light and the background, the spatial depth information of a detected object can be accurately acquired. For example, when the detected object is arranged in an environment with a single background or in an environment with similar background textures, the spatial depth information of the detected object still can be accurately obtained.

The invention discloses an aggregate digital image assessment system which comprises a motion control module, a computer module, an image acquisition module and a power supply module, an image preprocessing module, an aggregate identity module, an aggregate analysis and evaluation module and a data storage module. The assessment method includes that: a computer sends an instruction to a motion controller for controlling the linear sliding of a laser scanner; a CCD camera takes a picture of aggregate on a scanning board and transforms the image to a digital image; the digital image is transformed to a grey-scale map, And an edge detecting operator is utilized for carrying out image enhancement and restoration to the transformed grey-scale map so as to transform the grey-scale map to a binary image; the aggregate in the binary image is projected and the image of the aggregate in the binary image is detected and separated; IPP image processing and analysis software is used for calculating the three-dimensional coordinate of the surface of the aggregate; quantitative assessment category is carried out to the characteristics of the aggregate to obtain the gradation, the shape, the corner angle and the texture of the aggregate; the computer stores experimental data as well as analysis and assessment results. The aggregate digital image assessment system of the invention can be used for analysis and assessment of the aggregate.

The invention discloses a garment QD code recognition method. The method includes the following steps that firstly, a two-dimension code image attached to a garment raw material is collected; secondly, the image is subjected to graying, fast median filtering and binarization processing; thirdly, the image having been subjected to binarization processing is subjected to edge extraction; fourthly, two side edge regions obtained after edge extraction of a QR code are separated out; fifthly, Hough transform is adopted to detect a side-edge imaginary line so as to obtain the deviation angle of the QR code; sixthly, the image having been subjected to binarization processing is rotated according to the bilinear interpolation method, and initial correction is carried out; seventhly, the QR code is positioned, the sequence of three view finding images is determined, and the QR code is adjusted to have a correct orientation according to the image matrix transposition turning method; eighthly, decoding is carried out according to the national two-dimension code standard. According to the method, due to the combination of projection cutting and the Hough transform method, the deviation angle of the QR code can be quickly and accurately acquired, the collected image is immune from noise pollution and uneven illumination, and the two-dimension code image easy to identify can be obtained through transform.

The invention discloses a ground daily rainfall predicting method based on satellite remote sensing and regression Kriging. The method comprises the steps that firstly, data are fast obtained through satellite remote sensing, and a regression relation among ground-based observation values, TRMM, DEMs and geographic positions of rainfall capacities of all levels is established according to the classification of the rainfall to obtain regression estimated values and regression residual errors of all levels; secondly, the spatial agglomeration degrees of the regression residual errors of all levels are analyzed, the trend removing is carried out on the regression residual errors, and the Kriging interpolation of the regression residual errors is carried out to obtain the regression residual error spatial distribution characteristics of all levels per 1 km; thirdly, the regression estimated values of all levels and the regression residual errors of all levels are added to obtain the ground-based predicting values of rainfall of all levels per 1 km; lastly, the ground-based predicting values of the rainfall of all levels are merged to obtain a daily rainfall predicting value per 1 km. According to the ground daily rainfall predicting method, the spatial and temporal distribution characteristics of the ground-based rainfall can be accurately predicted, the predicting precision of the ground daily rainfall is improved, the predicted space resolution is improved, and the key problem that the water conservancy department predicts the ground rainfall is solved.

The invention discloses a clustering method for question sentences in a question-and-answer platform and a system thereof. The technical scheme is as follows: the question sentences in the question-and-answer platform is analyzed according to the semantic feature of the question sentences to obtain analysis results; the semantic feature comprises the question type and the comparison feature of the question sentences and thesaurus correlative to the content of the question sentences; and aiming at the question sentences which is analyzed by the semantic feature, a clustering algorithm for evaluating the semantic similarity of the question sentences is adopted to obtain clustering results of the question sentences in the question-and-answer platform. The system comprises a question sentences analysis module and a clustering algorithm module. Aiming at the problem that the clustering method for the question sentences in the question-and-answer platform and the system thereof are not existed in the prior art, the technical scheme of the invention fills the gap, thereby not only realizing fast and exact clustering method and system in the question-and-answer platform, but also improving user experience.

The invention provides an accurate and rapid road violation and parking full-automatic snapshot system. The system comprises a front-end monitoring point part, a network transmission part and a centermanagement unit. The vehicle detection technologies mainly comprise the vehicle dynamic detection technology and the vehicle tracking technology. A matched vehicle tracking method is estimated by utilizing the motion detection method based on time-based motion historical images and feature-point optical flows. In order to achieve a better motion detection effect, a shadow removing method is usedand a moving vehicle is more accurately detected. The multi-feature point optical flow detection tracking mode is adopted, and the tracking accuracy is obviously improved in combination with a vehicleshielding solution. The system is powerful in function and is sufficient to meet the requirements of various application occasions. By adopting the system, the functions of the remote control on a ball machine at a front end monitoring point, the previewing of the video monitoring, the automatic detection of the illegal parking, the automatic identification of license plate numbers, the association of the high-definition video recording with illegal behavior videos, the storage and the browsing of the vehicle information, the system management, the remote maintenance and the like are realized.

The invention discloses an automatic identification system of area topology. The system comprises a master station, a concentrator and one or more identification terminals; the master station is used for periodically generating an area topology identification instruction according to an area topology identification strategy, obtaining area topology logic relationship information generated by the concentrator and drawing an area topology graph according to the area topology logic relationship information; the concentrator is used for releasing an identification terminal control command according to the area topology identification instruction periodically generated by the master station, identifying an identification signal generated by the identification terminal and generating the area topology logic relationship information according to the identification signal; and the identification terminal is used for sampling a signal on a power line according to the identification terminal control command released by the concentrator, performing load carrier signal demodulation and operation processing and generating the identification signal. By adoption of the automatic identification system, the area topology identification precision can be guaranteed, and the area topology graph is obtained accurately; and the condition of the line can be periodically checked, and the manpower investment of operation and maintenance work of the power grid is reduced.

The invention discloses an experiment device for synthesizing a marine natural gas hydrate sample. The device comprises a reaction kettle, an axial compression piston, a kettle outer jacket, an injection system, an axial compression control system, a confining pressure control system and an output system. The invention further discloses an experiment method adopting the experiment device for synthesizing the marine natural gas hydrate sample. The method comprises the steps that firstly, ice powder particles are manufactured, then, the ice powder particles and dried porous medium particles are mixed and placed into the high-pressure reaction kettle in the subzero low-temperature environment so as to simulate seabed geomechanical properties, then, methane is injected to generate a hydrate, ice is directly converted into the hydrate, and finally free gas inside the reaction kettle is removed through the liquid injection system. According to the experiment device and method, true marine natural gas hydrate samples which are hard to obtain on various geological conditions and various occurrence form conditions can be economically, efficiently and accurately obtained, the research on the hydrate is closer to the reality, and the experiment basis is provided for research of natural gas hydrate exploitation.

An underwater moving target positioning algorithm based on single beacon is characterized in that one overwater moving beacon is used to position an underwater moving target; the moving beacon is provided with a satellite positioning receiver; and the underwater moving target is provided with a horizontal gesture sensor, a navigation speed sensor, and a vertical position sensor. Through the technology, the linear distance between the underwater target and the beacon can be obtained, at the same time, measured values of gesture, speed, and depth of underwater target can be obtained by the sensors carried by the underwater target; on the basis of the linear distance and measured values, a system model is established, the initial state is calculated, the state observability analysis is performed, the state equation is discretized, and finally Kalman filtering is carried out so as to obtain the estimate value of position of the underwater target.

The invention is applied in the field of nuclear power control, and provides a method for controlling the starting and stopping of a turbo generator set of a nuclear power plant, a device for controlling the starting and stopping of the turbo generator set of the nuclear power plant, and a digital control system (DCS). The method comprises the following steps of: detecting the running state and running parameters of the turbo generator set, the running state and running parameters of an auxiliary system of the turbo generator set, and fault information in the running of the turbo generator set; displaying the detected information on the same function tracking interface in a centralized way; and directly controlling the starting and stopping of the turbo generator set according to the information displayed on the function tracking interface. The method provided by the embodiment of the invention can make an operator directly and rapidly discover the anomaly of the turbo generator set, rapidly and accurately obtain key parameters and judge reasons, so that the operator can directly, rapidly and accurately control and intervene the starting and stopping of the turbo generator set of the nuclear power plant to ensure the security of the turbo generator set of the nuclear power plant.

The invention provides a generation method and system for video frequency frame depth graph. The method comprises: selecting critical frame in continuous video frequency frame of vide frequency sequence, and acquiring depth graph of critical frame; also following steps, extracting characteristic point of continuous frame of video frequency sequence; determining matching relation of each characteristic point of continuous frame; computing movement distance between characteristic points matching at continuous frame; then determining the corresponding characteristic point depth value at non-critical frame; performing depth assign for the non-critical frame, further acquiring depth graph of every video frequency frame of the continuous frame. The inventive method and system acquires relatively accurate depth graph of video frequency frame without need of manpower, largely shortens production period from planar video frequency to stereo video frequency, and reduces production cost and simultaneously promotes efficiency.

The invention provides a device for determining the gas-water relative permeability of a low-infiltration dense rock core. The device comprises a gas driving unit, a liquid driving unit, a first six-way valve, a confining pressure pump, a rock core clamping device, a second six-way valve, a liquid measurement unit and a gas measurement unit, wherein the gas measurement unit comprises a dryer, a precision electronic balance and a gas mass flow meter; the outlet end of the dryer is communicated with the gas mass flow meter; the dryer is arranged on the precision electronic balance; the gas driving unit and the liquid driving unit are communicated with the inlet of the rock core clamping device by the first six-way valve; the liquid measurement unit and the inlet end of the dryer are communicated with the outlet of the rock core clamping device by the second six-way valve; and the confining pressure pump is communicated with a confining pressure opening of the rock core clamping device. The invention further provides a method for determining the gas-water relative permeability of the low-infiltration dense rock core, which utilizes the determination device. By virtue of the determination device and the determination method, water-phase data of the outlet end of the rock core can be accurately obtained so that the gas-water relative permeability is accurately obtained.

The invention discloses a man-machine interaction question-answering method and system based on complex intention intelligent recognition, and the method comprises the steps: obtaining an original question sentence of a user, carrying out the sentence segmentation and part-of-speech tagging, and obtaining the part-of-speech information of each component word of the question sentence; performing dependency syntax analysis on the question sentence to obtain a dependency syntax tree; carrying out industry entity identification to obtain industry entities and the number, and extracting a core dependency tree to simplify questions; carrying out industry question relation classification on the questions, carrying out Chinese multi-intention question rewriting, and then carrying out knowledge retrieval on the questions; and selecting and generating answers for knowledge retrieval results, and returning the answers to the user. According to the method and system, multi-intention complex questions can be effectively simplified in any industrial scene, the intention of the user can be accurately understood, the industrial knowledge can be more naturally fed back to the user, the user can more accurately and quickly obtain the required industrial knowledge, the user experience is improved, and the method and system are particularly suitable for man-machine interaction intelligent questions and answers in the medical industry.

The invention discloses a channel estimation and diversity method based on train speed and position in train-ground communication, comprising the main steps: according to the obtained speed and position information of a train at current, inquiring channel state experience information corresponding to the position and the speed of the current train in a prestored channel state experience database;taking the information as a primary channel estimation result; verifying by a reference signal; if the verification result is not in a set error range, taking the verification result as a final channel estimation result; and if the verification result has big error, taking the channel estimation result of the previous frame as the final channel estimation result. The method has advantages of low complexity, high efficiency and accurate and reliable channel estimation result.

The invention discloses a method for optimizing search results, which comprises acquiring correlation evaluation of files containing search result; and sequencing the files containing search result according to the correlation evaluation of the files containing search result and content of the files containing search result. The inventive method for optimizing search result can make clear the actual search intent of user according to the correlation evaluation of files containing search result fed back from user, can sequence the files containing search result in combination with the files containing search result, and can feed files actually interested by user, useful to user and meeting user's search intent back to the user with high priority, so as to remarkably reduce user's search time, and improve search efficiency. By using the invention, users can rapidly, accurately and conveniently acquire the information required by them.