64results about How to "Avoid border effects" patented technology

The invention belongs to an electric energy quality monitoring technology, particularly a ship electric energy quality monitoring system. The system comprises a data analysis evaluation subsystem and data acquisition processing subsystems distributed on each node. The data acquisition processing subsystems are used for acquiring three-phase voltage and current signals of a ship power grid in real time and providing the three-phase voltage and current signals for the data analysis evaluation subsystem by the Ethernet; the data analysis evaluation subsystem is used for completing calculation of steady-state electric energy quality indexes in an on-line mode and giving an electric energy quality comprehensive evaluation according to an index weight; the detection of transient-state electric energy quality perturbation parameters is completed in an off-time mode; the steady-state electric energy quality indexes comprise a voltage deviation, a frequency deviation, harmonic waves, three-phase unbalance, voltage fluctuation and flicker; and the transient-state electric energy quality perturbation parameters comprise short duration voltage variation, time varying harmonic waves and inter-harmonics. According to the system, all the nodes on the power grid can be simultaneously monitored, the factors influencing the electric energy quality can be analyzed by a plurality of indexes and the level of the electric energy quality of the power grid is timely known.

The invention discloses a test device and a test method for testing kinetic shear characteristics between pipe piles and grouting soil bodies. The test device comprises a vibration platform, a pipe pile model test box, a loading mechanism and a monitoring system, wherein the pipe pile model test box comprises a steel bottom plate, stacked steel frames, a limiting mechanism, pipe piles arranged in the steel frames, and a sandy oil body; guide chutes are formed between the steel frames; balls are arranged on the guide chutes; hard soil is spread on the steel bottom plate; the part between the pipe piles and the sandy oil body is filled with cement paste; sealing films are arranged on the inner walls of the steel frames; and the monitoring system comprises a displacement sensor, a strain rosette group arranged on the outer surfaces of the pipe piles, and a pressure box arranged in the sandy oil body. According to the device and the method disclosed by the invention, the box wall boundary influence can be well eliminated, the problem that a scale effect and a test model similarity ratio relationship are difficult to determine is solved, the test results are accurate, reasonable and reliable, and reliable basic data is provided for theoretical analysis and engineering practice.

A method for predicting abnormal eye convergence in a human or animal subject may involve tracking eye movement of at least one eye of the subject to generate eye tracking data for the subject and using the eye tracking data to predict whether the subject has abnormal eye convergence. A method for diagnosing a brain injury in a human or animal subject may involve tracking eye movement of at least one eye of the subject to generate eye tracking data for the subject, using the eye tracking data to predict whether the subject has abnormal eye convergence, and predicting whether a brain injury has occurred in the subject, based on the prediction of whether the subject has abnormal eye convergence.

The invention provides methods and kits for detecting, screening, quantifying or localizing the etiology for reduced or impaired cranial nerve function or conduction; localizing a central nervous system lesion; detecting, diagnosing or screening for increased intracranial pressure, pressure or disruption of central nervous system physiology as seen with concussion; or detecting, diagnosing, monitoring progression of or screening for a disease or condition featuring increased intracranial pressure or concussion by tracking eye movement of the subject.

The invention provides methods and kits for detecting, screening, quantifying or localizing the etiology for reduced or impaired cranial nerve function or conduction or associated cranial nucleus or supranuclear input, useful for detecting, diagnosing or screening for increased intracranial pressure, or useful for detecting, diagnosing, monitoring progression of or screening for a disease or condition featuring increased intracranial pressure by tracking eye movement of the subject. The methods may be performed by a) analyzing eye movement of the subject; b) comparing eye movement of the subject to eye movement of a control or the subject's own baseline eye movement; and c) identifying the subject as having eye movement significantly different from the control or the subject's own baseline eye movement.

The invention relates to a device for measuring apparent viscosity of liquefied sand and a method therefor. The device comprises a vibration table and a model box, wherein a horizontal track is arranged in the model box; a rigid ball is placed on the track; both ends of the rigid ball are respectively connected with dynamic tension sensors which are pulled by traction ropes; the traction ropes are led out of the model box through a fixed pulley set and connected with two dynamic displacement sensors and then connected on a reversible regulating motor; and a dynamic pore pressure sensor is arranged at the equal height with the rigid ball in the model box. The saturated sand in the model box can be in the liquefaction state through the vibration table, the motor drives the rigid ball to do horizontal movement on the track, the speed and resistance of the rigid ball are measured, and the apparent viscosity of the liquefied sand is calculated. The invention solves the technical problems of apparent viscosity measurement of the liquefied sand, can perform parallel test in the same test and has the advantages of high test efficiency and small boundary effect.

The invention discloses a preparation method of double pipes of a non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction, which comprises the steps of: evenly mixing non-crystalline powder which is taken as reinforced phase and aluminium-base body powder, and filling into a steel inner pipe; arranging a steel outer pipe with a gap out of the inner pipe; arranging subuliform PVC end stoppers at the upper ends of the inner pipe and the outer pipe to adjust the wave shape; sealing the lower ends of the inner pipe and the outer pipe; packing explosive out of the outer pipe; exploding at the center of a top by a blasting cap; adopting a point exploding mode; slidably detonating at the side wall of the outer pipe after exploding the explosive to drive the outer pipe to beat the inner pipe and compact the powder; and eliminating the inner pipe and the outer pipe to obtain the block non-crystalline grains reinforced aluminium-base composite material. The preparation method can effectively prevent heat energy generated by the exploding of the explosive from acting on the mixed powder and can effectively reduce the whole temperature increase of the powder to be capable of keeping the characteristic of the non-equilibrium state of the reinforced phase non-crystalline grains; can arrange the layers of steel cushion in the inner pipe with numbers as required to obtain the block composite material with required numbers for once; and has low cost.

A method for measuring microcosmic dynamic properties of each compositive phase in a multiphase material comprises the following steps that: (1) a multiphase material sample to be measured is prepared; (2) one or a plurality of test areas are selected on the surface of the sample to be measured randomly to perform the nanometer pressing-in test, test points are arranged in a way of grid, grid nodes and impressing points are put into a one-to-one correspondence; (3) the test result is analyzed initially to get E-hardness H data pairs of available elastic modules with the number of Ne, a scattergraph is drawn in a data summarization list or in an E-H rectangular plane coordinates system; (4) the effective data points with the number of Ne are sorted, the data group and the compositive phases are in a one-to-one correspondence; (5) the volume fraction and the microcosmic dynamic properties of each compositive phase are determined according to the data group. Therefore, each compositive phase content, the elasticity modulus and the hardness of the multiphase material can be measured conveniently and flexibly; the measure result is intuitive and reliable, thereby being particularly suitable for the measurement of the microcosmic dynamic properties of each compositive phase in the multiphase materials such as the multiphase steel, the polymer, the biological materials and the composite materials, etc.

The invention relates to measuring device and method of the apparent viscosity of saturated sand in a high pore pressure ratio state. The measuring device comprises a model box and an external water box, wherein the external water box can regulate the height of a water surface; a flexible pipe is led from the bottom of the water box and penetrates through an opening positioned at the bottom of the model box to connect with a water outlet pipe inside the model box; a hard board with the opening is placed on the lower part inside the model box; a rigid sphere with both ends hauled by haulage ropes is placed on a horizontal track inside the model box; and the haulage ropes are led out of the model box through a fixed pulley block and connected with a forward and reverse rotating speed-regulating motor. The measuring method comprises the following steps of: enabling the saturated sand inside the model box to be in a super-pore pressure ratio state before liquification by changing a water level of the external water box; enabling the speed-regulating motor to drive the rigid sphere to take horizontal movement on the track, and measuring the speed and the resistance of the rigid sphere; and calculating the apparent viscosity of the saturated sand before the liquification. The invention solves the problem of measurement of the apparent viscosity of the saturated sand in the high pore pressure ratio state before the liquification and has the advantages of easy test operation, high efficiency and low border effect.

The invention relates to a laser segment-scanning plate bending forming device and method. The method comprises the steps that a metal plate to be machined is placed below a first scanning head and a second scanning head; scanning paths and scanning powers of a first laser device and a second laser device are set through a computer; the scanning paths of the first laser device and the second laser device are connected in the middle of the metal plate, and the scanning powers gradually decrease from the edges of the metal plate to the middle of the metal plate; the first scanning head and the second scanning head moves face to face and starts to scan along the respective scanning paths. Through the laser segment-scanning plate bending forming device and method, difference of laser bending angles in all positions of the metal plate can be reduced, the boundary effect is avoided, and the forming quality of plates improved.

The invention discloses a method and a device for embedding a visible watermark into an image. The method comprises the following steps: after a fundamental region into which each visible watermark is to be embedded is determined in an original image data block, a final region into which each visible watermark is to be embedded is obtained by enlarging the fundamental region; an image data block, into which the visible watermarks are imbedded, is obtained by embedding the visible watermarks into the fundamental region; an additional data block is built according to information about the visible watermarks and information about the final region; and after the additional data block is connected to the image data block into which the visible watermarks are embedded, the embedding of the visible watermarks is completed. Meanwhile, the invention further discloses a method and a device for recovering an original image. By enlarging the fundamental region and building the additional data block, the invention recovers precisely the original image, avoids blocking effect and boundary effect, and avoids visual impact caused by compression. Moreover, the whole method is self-closed, recovers the original image without requesting extra data, and realizes rapid operation.

The invention discloses a dense connection convolutional network-based target tracking method. The method comprises the following steps of S1, determining the size and position of an interested target; S2, extracting convolution features of an input frame and judging the convolution features, if the input frame is an initial frame, solving a PCA projection matrix to reduce the dimension of the convolution features, using the obtained convolution features to train a dense connection network-based target tracking model, entering S7, otherwise, using the trained PCA projection matrix to reduce the dimension of the convolution features of the input frame, and entering S3; S3, inputting the convolution features into a tracking model to predict the position of the target of interest; S4, performing scale sampling at the target prediction position, and estimating the size of the target; S5, updating the network weight of the target tracking model; S6, outputting a target prediction position and scale; and S7, inputting the next frame until all frames of the video are predicted. According to the invention, end-to-end learning of the tracking model is realized, the training time is effectively shortened, and the use efficiency is improved.

The invention discloses a testing apparatus and a testing method for simulating liquefied particle motion characteristics. The apparatus comprises: a model box, a model box sealing cap, a workbench, and a PIV optical testing platform. The model box is prepared from a transparent plexiglass material. A water injection hole is arranged on the side of the model box. A vacuum pumping hole is arranged on the sealing cap. Two rails are arranged inside the model box. A fixed pulley assembly and a forward and reverse motor are connected outside the model box. The testing method comprises that: liquefied sands are simulated by using suspending plastic sands in a sodium chloride solution with a certain density; a steel wire is drawn by the motor, such that a solid cylinder moves horizontally on the rails; the motion states of the plastic sands around the cylinder during the movement is measured by using the PIV optical testing platform; and the horizontal tensile force on the cylinder during the movement is measured by using a tension sensor. The apparatus and the method provided by the invention are advantaged in high precision, simple operation, stable state after liquefaction simulation, and the like.

The invention discloses an image super-resolution reconstruction method based on multi-layer supporting vectors and mainly aims at solving the problems that high-frequency information is lost and a ring effect is generated in an existing super-resolution method. The realizing steps of the method are as follows: (1) respectively establishing a training sample base and a testing sample base, (2) establishing first-layer support vector regression machine models of testing samples, (3) predicating high-resolution luminance initial images and initial training images, (4) calculating differential value training images of the initial training images, (5) establishing second-layer supporting vector regression machine models of the differential value training images, (6) calculating high-resolution luminance differential value images, (7) adding the high-resolution luminance initial images and the high-resolution luminance differential value images to obtain high-resolution luminance images, The images reconstructed through the method have the advantages of being clear in edge, rich in texture and closer to real images. The method can be used for video monitoring and high-definition television (HDTV) imaging.

The invention discloses a method of calculating the travelling wave front of a single-phase grounding fault in a distribution network. A line data collector uploads two voltage cycles before a fault and two voltage cycles after the fault, performs Karrenbauer transform on the voltage travelling wave to get a line mode voltage, performs Hilbert transform on the line mode voltage, carries out derivation, and calculates the modulus. The obtained modulus is de-noised, an effective interval is taken, and then, the arrival time of the travelling wave front is obtained. The method has the advantage of quick and accurate calculation. Through the method, the arrival time of the travelling wave front can be calculated accurately, and conditions can be created for fault location. The method has a very good application prospect.

The invention discloses a soil pressure sensor mounting, loading and testing device, and an operating method thereof. A punching mechanism and an embedding mechanism are not required to excavate a tunnel for embedding a sensor in advance, and are only required to downwards drill a hole for placing the soil pressure sensor along a certain angle; the excavated tunnel is prevented from influencing a boundary effect of a testing point for embedding the soil pressure sensor; the disturbance and the damage to a structural state of in-situ soil can be reduced to the greatest extent; the labor intensity of embedding the soil pressure sensor is reduced; a loading and testing mechanism is controlled by a hydraulic drive which is stable in loading speed and accurate in control; and the transmission condition of stress in a soil body is reflected by a loading load and loading stress measured by the soil pressure sensor embedded in the soil body, so that a compaction and stress process of farmland soil can be reflected more accurately. The soil pressure sensor mounting, loading and testing device is simple in structure, low in cost, convenient to use and accurate in measurement, is widely applicable to testing the compaction condition of the farmland soil, and is suitable for popularization and using.

The invention discloses a test device and method for simulating a three-dimensional flow state of a caving zone filling slurry. The test device is composed of a delivery pump, a slurry diffusion testbox body, a loading device and a monitoring system. Transparent stone bulk materials are uniformly stacked in the box body, the three-dimensional stacking form of a caving zone of a goaf is simulatedthrough the loading device, the slurry containing tracer particles is injected into the box body through a high-position grouting pipe or an adjacent-position grouting pipe in the conveying pump, andthe tracer particles scatter under the action of the laser device, so that the diffusion form of the slurry in the three-dimensional space along the accumulated cracks can be clearly observed, and images are collected at regular time through a high-definition wide-angle camera. The test method can be used for researching the three-dimensional diffusion rule of the filling slurry of the caving zoneof the goaf under the influence of different concentrations, different accumulation forms and different intervention positions. The method has a certain reference value for the basic theoretical research in the green mining fields of underground coal mine filling mining, goaf treatment and the like.

The invention discloses large-size reinforced soil shear strength testing equipment, and a testing method. The large-size reinforced soil shear strength testing equipment comprises a control unit, a pressure loading unit and a shear box assembly; the control unit comprises an industrial computer A, a normal force motor, a horizontal force motor, a microcomputer control system, a normal force loading driving device, a horizontal force loading driving device, a normal force motor driving device and a horizontal force motor driving device; the pressure loading unit comprises a base, a slide way,a normal force loading shaft rod and a horizontal force loading shaft rod, and an outer blocking piece is arranged on the slide way; and the shearing box assembly is arranged in the outer blocking piece. In addition, the invention also provides a testing method adopting the equipment. The equipment can realize a large-size direct shear test of reinforced soil and obtain a comprehensive evaluationresult of a large-size soil sample shear strength test, has the advantages of reasonable evaluation parameters, high accuracy and high efficiency, and can meet the requirements of a multi-parameter complex test scheme.

The invention belongs to the technical field of molecular simulation and seepage mechanics, and discloses a molecular simulation method for calculating gas permeability in micro-nano pores. The methodcomprises the steps of performing giant regular Monte Carlo simulation in an H region of a high-pressure region to balance initial conditions; carrying out molecular dynamics simulation, so that gasmolecules in the H region continuously flow to the L region through pores under the action of pressure difference; and after the system flow is balanced, counting the number N of gas molecules passingthrough the pores by adopting a statistical method. According to the method, an unbalanced molecular dynamics simulation method is adopted; the proposed modeling method can simulate the flow of gas in micro-nano pores under different temperature and pressure conditions; the number of gas molecules is counted through a statistical method, and the permeability is directly calculated; various mechanisms of gas flow in micro-nano pores are comprehensively reflected on the basis of real particle interaction and motion states; the limitation of flow partition is eliminated; and the permeability ofa complex flow desorption process which is difficult to describe by a conventional method can be calculated.

The file clustering method based on self-organization mapping network comprises: finding out all the selected files; initiating the output layer of the network as ring structure to divide it equally at least into two parts with every sector as a neuron; calculating R2 clustering criterion factor of current output layer; deciding whether the said factor more than the threshold mu, if yes, stopping the training and classifying the file according to current self-organization mapping network; or else, finding out the neuron with maximal RSS in class to interpolate a new neuron, then training all neurons of current output layer. This invention can self-adapt the input file data and fixed structure and other incidental problems.

The invention discloses a testing device for simulating bidirectional self-induced vibration of deep-sea stand columns under inclined uniform flow. The testing device obtains velocity and stress of a cylinder body through measuring, obtains actual motion response signals under the effect of water flow by solving a motion equation of the cylinder body and exerts the actual motion signals onto models through a servo motor to enable the models to move, so that self-oscillation motion is simulated. During test, a horizontally sliding module is used for simulating flow and vortex-induced oscillation in the horizontal direction, and a vertically sliding module is used for simulating vortex-induced vibration in the vertical direction. The device sets parameters to simulate model structure performance, avoids messy testing operations in a traditional self-oscillation device, accelerates testing progress, provides large freedom degree for selection of parameters of a vibration system, simulates vortex-induced vibration bidirectionally and synchronously, simulates special working conditions of inclined flow, adopts large-scale stand column subsection to reduce scale effect, and adopts an end prosthesis device to solve the problem of model boundary effect.

The invention provides methods and kits for detecting, screening, quantifying or localizing the etiology for reduced or impaired cranial nerve function or conduction; localizing a central nervous system lesion; detecting, diagnosing or screening for increased intracranial pressure, pressure or disruption of central nervous system physiology as seen with concussion; or detecting, diagnosing, monitoring progression of or screening for a disease or condition featuring increased intracranial pressure or concussion by tracking eye movement of the subject. The invention also provides methods and kits useful for detecting, screening for or quantitating disconjugate gaze or strabismus, useful for diagnosing a disease characterized by disconjugate gaze or strabismus in a subject, useful for detecting, monitoring progression of or screening for a disease or condition characterized by disconjugate gaze or strabismus in a subject or useful for quantitating the extent of disconjugate gaze or strabismus. Further, the invention provides methods for assessing or quantifying structural and non-structural traumatic brain injury or diagnosing a disease characterized by or featuring structural and non-structural traumatic brain injury.

The invention provides a vibration reduction and isolation model test device for a railway vibration source. The vibration reduction and isolation model test device comprises a test box, an in-box soil body, a vibration isolation barrier, a data acquisition device and a load applying device; the vibration isolation barrier is arranged inside the soil body and on the surface of the soil body and isused for evaluating a vibration isolation effect; the data acquisition device is arranged in the soil body and on the surface of the soil body and is used for acquiring vibration signals and transmitting acquired data to the load applying device; and the load applying device comprises a simulation vibration device and a control device, wherein the simulation vibration device is arranged above thesoil body and is used for simulating moving load, and the control device is arranged outside the box body and is used for controlling the simulation vibration device to act and displaying and storingthe acquired data. According to the vibration reduction and isolation model test device of the invention, closed-loop PID control is adopted, so that the output of an excitation force can be accurately controlled; an electromagnetic-type vibration exciter is used as an excitation device, so that vibration excitation signals with a relatively wide frequency range can be provided; and a wireless vibration sensor is adopted, so that the influence of a line on a test can be avoided when the internal vibration of the soil body is measured.

The invention discloses a testing device for simulating cross self-induced vibration of deep-sea stand columns under inclined uniform flow. The testing device obtains velocity and stress of a cylinder body through measuring, obtains actual motion response signals under the effect of water flow by solving a motion equation of the cylinder body and exerts the actual motion signals onto models through a servo motor to enable the models to move, so that self-oscillation motion is simulated. During test, a horizontally sliding module is used for simulating inclined flow, and a vertically sliding module is used for simulating vortex-induced vibration in the vertical direction. The device sets parameters to simulate model structure performance, avoids messy testing operations in a traditional self-oscillation device, accelerates testing progress, provides large freedom degree to selection of parameters of a vibration system, actually simulates cross vortex-induced vibration of the stand columns, simulates special working conditions of inclined flow, adopts large-scale stand column subsection to reduce scale effect, and adopts an end prosthesis device to solve the problem of model boundary effect.

The invention provides a method for manufacturing an LED (light-emitting diode). Firstly a picoseconds laser is used for performing laser internal cutting on a sapphire substrate according to a preset path to form an internal cut pattern inside the sapphire substrate and make the structure of a specific position of the sapphire substrate to change, and then epitaxial growth is performed to manufacture a light-emitting epitaxial structure to thin the sapphire substrate, and finally performing splintering along the internal cut pattern to complete the manufacturing. According to the method, since a process method that laser internal cutting is firstly performed on the sapphire substrate and the light-emitting laser epitaxy is then performed is adopted, damage caused by direct or indirect irradiation gallium nitride by laser can be prevented, luminance of the LED and a yield rate of final products are helped to improve, and a problem that the light-emitting epitaxy has a boundary effect caused by walkways firstly formed on the surface of the sapphire can be prevented. The method for manufacturing the LED is stable in process, high in repeatability, and can be applied to industrial production.

A large three-dimensional detachable similar simulation experiment device for drilling cuttings comprises a detachable counter-force frame, a top hydraulic loading oil cylinder set, a side hydraulic loading oil cylinder set and a rear dynamic load loading oil cylinder. Hydraulic loading oil cylinders in the top hydraulic loading oil cylinder set and the side hydraulic loading oil cylinder set can be independently loaded so as to realize simulation of a crushing area, a plastic area and an elastic area; a horizontal dynamic load is independently applied through rear dynamic load loading oil cylinders to simulate the influence of dynamic disasters such as mine earthquakes on the stress and strain of the coal rock mass, so that the credibility of an experimental result is improved; through independent loading of a plurality of hydraulic loading oil cylinders, a drilling cutting experiment and a drilling pressure relief experiment with a coal seam inclination angle can be carried out, the outermost side of a loading cushion block extends to the outside of a sample, and a boundary effect can be effectively avoided during loading so as to reduce experiment errors; and the whole experimental device forms a three-dimensional structure, ground stress is simulated more accurately, and the accuracy of similar simulation experimental results of drilling cuttings and drill hole pressure relief is further improved by adopting a large-size sample.

The invention discloses a method and a device for embedding a visible watermark into an image. The method comprises the following steps: after a fundamental region into which each visible watermark is to be embedded is determined in an original image data block, a final region into which each visible watermark is to be embedded is obtained by enlarging the fundamental region; an image data block,into which the visible watermarks are imbedded, is obtained by embedding the visible watermarks into the fundamental region; an additional data block is built according to information about the visible watermarks and information about the final region; and after the additional data block is connected to the image data block into which the visible watermarks are embedded, the embedding of the visible watermarks is completed. Meanwhile, the invention further discloses a method and a device for recovering an original image. By enlarging the fundamental region and building the additional data block, the invention recovers precisely the original image, avoids blocking effect and boundary effect, and avoids visual impact caused by compression. Moreover, the whole method is self-closed, recoversthe original image without requesting extra data, and realizes rapid operation.

The invention belongs to an electric energy quality monitoring technology, particularly a ship electric energy quality monitoring system. The system comprises a data analysis evaluation subsystem and data acquisition processing subsystems distributed on each node. The data acquisition processing subsystems are used for acquiring three-phase voltage and current signals of a ship power grid in real time and providing the three-phase voltage and current signals for the data analysis evaluation subsystem by the Ethernet; the data analysis evaluation subsystem is used for completing calculation of steady-state electric energy quality indexes in an on-line mode and giving an electric energy quality comprehensive evaluation according to an index weight; the detection of transient-state electric energy quality perturbation parameters is completed in an off-time mode; the steady-state electric energy quality indexes comprise a voltage deviation, a frequency deviation, harmonic waves, three-phase unbalance, voltage fluctuation and flicker; and the transient-state electric energy quality perturbation parameters comprise short duration voltage variation, time varying harmonic waves and inter-harmonics. According to the system, all the nodes on the power grid can be simultaneously monitored, the factors influencing the electric energy quality can be analyzed by a plurality of indexes and the level of the electric energy quality of the power grid is timely known.