189 results about "Random coding" patented technology

A system and method for generating action cues and recommendations for provision to an electronic device are provided. Context data associated with an electronic device and derived from one or more of sensor data, device state data, and application data is received, and a profile for the electronic device or a user thereof is defined using the context data, representing probability distribution. A selected action from a plurality of actions executable at the electronic device is identified using the profile, and a cue is returned to the electronic device for execution. The profile may be constructed as a factor graph representation using random coding techniques.

A planar structured light three dimension measuring device and method for a high-reflectivity part relate to the field of three dimension optical measurement and aim to solve the problems of large size and slow measuring speed due to the complex structure of the existing device. The planar structured light three dimension measuring device comprises a blue laser source system, a structured light pattern generation system, a synchronous control circuit, an image collection system and a computer. The device has the advantages of small size, light weight, fast projecting speed and the like. The phenomena of local mirror reflection, mutual reflection and direction reflection and the like at the part surface are effectively inhibited by the projecting random or pseudo random coding patterns and two groups of periodically, forwardly and reversely changed black and white strip patterns, the sub pixel point match of two images shot by left and right cameras are fast realized, and the efficient measurement of the high-reflectivity part is finished. The planar structured light three dimension measuring device and method for the high-reflectivity part is suitable for the planar structured light three dimension measurement of the high-reflectivity part.

The invention discloses a construction method of a neural network model for realizing image classification. The construction method comprises the following steps: S1, constructing a unit structure search network, a system structure search network, an image training set and a random coding array; s2, generating a neural network model by using the unit structure search network, the system structuresearch network and the random coding array; s3, inputting the image training set into a neural network model to obtain an actual classification result; s4, judging whether an actual classification result meets a preset condition or not, and if not, performing a step S5; s5, updating the unit structure search network and the system structure search network according to the actual classification result and the theoretical classification of the image training set; s6, repeating S2; And S5, until the actual classification result obtained in the step S4 meets the preset condition. According to themethod disclosed by the invention, an original search space is converted into two spaces, namely a unit structure search space and an architecture search space, the optimal architecture of the architecture is searched in an automatic learning manner, and the flexibility of the generated model architecture is enhanced.

Provided is a method for processing seismic data. One exemplary embodiment includes the steps of obtaining a plurality of initial subsurface images; decomposing each of the initial subsurface images into components; identifying a set of components comprising one of (i) components having at least one substantially similar characteristic across the plurality of initial subsurface images, and (ii) components having substantially dissimilar characteristics across the plurality of initial subsurface images; and generating an enhanced subsurface image using the identified set of components. Each of the initial subsurface images is generated using a unique random set of encoding functions.

The present invention relates to an encoding frequency-hopping high-resolution distance-measuring speed-measuring method and radar. In particular, it is applicable to automobile anti-collision radar and police speed-measuring radar, and can be substituted for infrared alarm to make all-weather real-time safety supervisory control for large-range sensitive area. Said invention also provides the concrete steps of said distance-measuring and speed-measuring method, and can make several radars have strong anti-interference power when they are simultaneously worked.

Randomized coded arrays and methods of forming a randomized coded array. The methods include: forming a dielectric layer on a semiconductor substrate; forming an array of openings extending through the dielectric layer; introducing particles into a random set of less than all of the openings; and forming a conductive material in each opening of the array of openings, thereby creating the randomized coded array, wherein a first resistance of a pathway through the conductive material in openings containing the particles is different from a second resistance of a path through openings not containing the particles. Also, a physically unclonable function embodied in a circuit.

The invention discloses a photon counting laser radar based on composite pseudo-random coding. The photon counting laser radar is composed of a signal generator, a light intensity modulation device, alaser device, a beam splitter prism, a circulator, an optical system, a scanner, a GM-APD single-photon detector, a photodiode, a photon counting module, and a signal processing module. An overall structure of a transmitting-receiving-same-path type optical reduced system is employed and a scanner is used for carry out scanning and transmitting a laser pulse string, so that the field angle of thelaser radar is extended. After processing on a laser signal transmitted by an optical system by the beam splitter prism, one part of the signal irradiates the photodiode directly to form a light trigger signal and the other part of signal is scanned by the scanner and then the scanned signal is irradiated on a target; an echo signal reflected by the target enters the scanner, the processed signalreturns to a second port of the circulator by the optical signal and enters the GM-APD single-photon detector through a third port of the circulator; the GM-APD single-photon detector records an echosequence and generates a stopping signal; and a detection result recorded by the photon counting module is transmitted to the signal processing module for follow-up processing and flight time of a pulse string is obtained.

Easily implemented randomization within a flash memory EEPROM reduces the NAND string resistance effect, program disturbs, user read disturbs, and floating gate to floating gate coupling that result from repeated and long term storage of specific data patterns. The randomization may be code generated pseudo randomization or user driven randomization in different embodiments. User driven commands, the timing of which cannot be predicted may be used to trigger and achieve a high level of randomization. Randomly altering the encoding scheme of the data prevents repeated and long term storage of specific data patterns. Even if a user wishes to store the same information for long periods, or to repeatedly store it, it will be randomly encoded with different encoding schemes, and the data pattern will therefore be varied.

The invention relates to a wireless sensor network multi-path routing method based on network coding, and belongs to the field of wireless sensor network communication. The wireless sensor network multi-path routing method based on the network coding is characterized in that paths between any source node to a destination node are ranked according to the size of path advantages from large to small according to path advantage values based on coding priority nodes, priority selection paths are provided, and I (I>=K) coding data packages formed by K original data packages and sent by source nodes are transmitted in the mode of one-to-one correspondence with the priority selection paths. Firstly, in the data transmitting process of data coded by the source nodes, one coding advantage node is a multi-path interesting point, random coding is carried out on input coded data again, coded numbers indicating the nodes to be receiving nodes in a routing list are taken out, coding coefficients in the second-time coded data marked with the other intermediate nodes or destination node addresses of a lower layer are then decoded and output downstream, and the rest nodes are done in the same way until the destination node is output. The wireless sensor network multi-path routing method based on the network coding combines the network coding and multi-path selection and is good in effect.

The invention includes a method for reducing noise in migration of seismic data, particularly advantageous for imaging by simultaneous encoded source reverse-time migration (SS-RTM). One example embodiment includes the steps of obtaining a plurality of initial subsurface images; decomposing each of the initial subsurface images into components; identifying a set of components comprising one of (i) components having at least one substantially similar characteristic across the plurality of initial subsurface images, and (ii) components having substantially dissimilar characteristics across the plurality of initial subsurface images; and generating an enhanced subsurface image using the identified set of components. For SS-RTM, each of the initial subsurface images is generated by migrating several sources simultaneously using a unique random set of encoding functions. Another embodiment of the invention uses SS-RTM for velocity model building.

The invention discloses a method for detecting deep geology and sulfide ore resources, the method comprises the steps of: transmitting a pseudo random transmitting waveform to underground by a transmitting device, propagating back to the ground through underground mediums, observing and collecting electromagnetic field response signals by a receiver; analyzing the correlation of electromagnetic field response signals observed by the receiver and the transmitting waveform, deconvolution identifying and extracting an earth impulse response signal stimulated by the pseudo random transmitting waveform, calculating an apparent resistivity and a polarizability phase; processing data and obtaining the polarizability phase with high resolution and electrical property fine structure which are reflecting deep resources. According to the method for detecting deep geology and sulfide ore resources disclosed in the invention, interference is deconvolution suppressed by using a pseudo random encoding current signal transmission of an electrical prospecting apparatus, observed electromagnetic field responses and emission current signals, the apparent resistivity and excitation polarization methodphase are calculated, investigation and detection of deep geology and sulfide ore resources are achieved, investigation accuracy of deep sulfide ore is greatly improved, and actual popularization andapplication are facilitated.

A wavefront sensor and a wavefront measuring method are disclosed. The wavefront sensor comprises a two-dimensional random coding mixing raster and a detector, wherein the two-dimensional random coding mixing raster comprises a random coding amplitude raster and a chessboard type phase raster. The pixel dimension of the random coding amplitude raster, the processing difficulty is reduced, and the wavefront measuring precision is not affected.

The invention discloses a device and a method for identifying gestures through compressed infrared sensing. According to the device for identifying the gestures, a pyroelectricity infrared sensor array visibly modulates a sub field-of-view in a Fresnel lens installed in front of a pyroelectric sensor by means of a random coding mode to randomly compress and project high-dimensional infrared radiation states generated by gesture motions into low-dimensional pyroelectricity infrared sensing array measurement space, so that characteristics of the gesture motions are obtained. According to the method for identifying the gestures, each semantic motion characteristic sequence with special actions is subjected to characteristic parameter estimation by means of vector quantization, a codebook is distributed to each characteristic sequence through training data and used as a semantic expression template, and test data are subjected to decision making by means of a classifier to express semanteme, so that the gesture actions are distinguished. By means of compressed infrared sensing, the gesture motion characteristics are obtained, generation and processing progresses of redundant and invalid information are effectively avoided, complexity and hardware costs of a sensing system are obviously reduced, and a light weight gesture identification algorithm is supported.

A system includes a tamper detector that includes a linear feedback shift register (LFSR) for generating pseudorandom coded detection signals as a function of seed values and a generator polynomial. The generator polynomial is loaded from a controller to the LFSR via software, and the seed values are directly loaded from a hardware-based random number generator to the LFSR. The tamper detector has output and input elements for connection to ends of a tamper detection circuit, wherein the detection circuit is linked with a physical closure surrounding an electronic circuit. The detection signals are applied to the output element and incoming signals are received from the tamper detection circuit at a comparator via the input element. Comparison of the incoming signals with the coded detection signals is performed to detect interference with the detection circuit in an attempt to tamper with the electronic circuit.

The invention belongs to the filed of image matching of coding structured light active visual sense in machine visual sense, in particular to a feather point matching method based on the colored false random coding projection. The invention is based on a false random coding principle, and designs a novel colored coding projection template by using a point and line combined method. The method comprises the following concrete steps: 1. generating a false random sequence from a0, a1 to an by a feedback network n-displacement bit register specified by a primitive polynomial h(x)=xm+hm-1xm-1+...+h1x+h0; 2. filling the false random sequence from a0, a1 to an into a matrix with the size of n=n1*n2 for generating a false random array b; and 3. using the generated array values as the discrete feather points, connecting the feather points by a feather line, and establishing a coding template. The invention introduces a morphological algorithm, and provides the extraction algorithm of the relevant feather points. In the decoding process, the invention provides the thought of mutual verification of adjacent windows, can realize the automatic extraction and matching of the feature points, and can perfectly solve the problem of shadow generation during the projection of the structural light on the surface of the complicated three-dimensional scenes and the problem of mistake feather point matching caused by that parts of coding patterns are covered because the shooting angles of a video camera are different.

This invention overcomes the disadvantages of the prior art by providing a system and method for cryptographic communication that allows for the use of identical random number database structures located on the sending and receiving clients to randomly encode and decode messages based on encoded instructions on how to apply the database to encode and subsequently decode the underlying encoded message data, allowing for a secure and keyless transfer of message data between the sender and the recipient. Illustratively, an encoded message on a sending client with an appended header containing the filename, a unique synchronization block and instruction set with the method and starting point is encoded again to obscure the header. The message is transmitted and received by a receiving client and decoded, first by trial and error on the header portion to reveal the header, and then the remaining message data according to the revealed instruction set.

The present invention discloses a two-dimensional absolute displacement encoder, which comprises a light path system and an FPGA signal processing system. The light path system comprises a parallel light source, a two-dimensional absolute encoding code channel, an imaging lens group, an aperture diaphragm and an image sensor. The two-dimensional absolute encoding code channel is placed on a to-be-measured plane, and is composed of code elements the same in size and encoded in the pseudo random coding mode, wherein the code elements are capable of reflecting the light or not capable of reflecting the light. The FPGA signal processing system mainly conducts the FPGA realization for the configuration of the image sensor, the reading of the image information, the median filtering and binarization treatment of images, the image cache, the code identification, the decoding algorithm and the like. Meanwhile, the FPGA signal processing system realizes the output of two-dimensional absolute position measurement values. The two-dimensional absolute displacement encoder has the advantages of simple structure and strong real-time property. The two-dimensional absolute displacement encoder can quickly decode and output a two-dimensional absolute position measurement value. The two-dimensional absolute displacement encoder can be widely applied to the absolute positioning and the precision measurement of a two-dimensional workbench and has a good practical application prospect.

The invention discloses a three-dimensional reconstruction method based on color pseudo-random coding structured light, comprising the following steps: projecting a preset color structured light pattern on a target object, wherein the color structured light pattern comprises a plurality of squares, and the colors of any two adjacent squares are different; on the premise of satisfying the binocularvision polar constraint, the odd lines of color structured light pattern are the same in color, and the even lines are the same in color; acquiring an object image in the step by using a camera; performing corner extraction of the target image; carrying out feature description and matching of the proposed corner points, and using a triangulation method to complete the three-dimensional reconstruction. The invention enhances surface information of an object in a three-dimensional scene. The experiment shows that the root-mean-square error of three-dimensional reconstruction of a planar objectis 0.36 mm on the premise that only one color structured light pattern is projected, and it is obvious that the three-dimensional reconstruction method of the invention has the advantages of higher accuracy, accuracy and effectiveness, and can be applied to three-dimensional reconstruction of an acolor object.

The invention proposes a random scattering medium based controllable sub-wavelength maskless photoetching system and method, which is used for solving the technical problem of high cost, low time efficiency and low resolution of a photoetching technology. A spatial light modulator I is used for generating a target pattern, a light wave passes through the spatial light modulator I and then is incident to a surface of a random scattering medium, the random scattering medium is used for random coding of light, a spatial light modulator II is used for compensating phase distortion generated by the random scattering medium, and finally, sub-wavelength imaging through the scattering medium is achieved, an arbitrary controllable sub-wavelength digital mask is formed for projection exposure. By the system and the method, the fabrication of a mask is avoided, and the photoetching cost is greatly reduced; with the combination of random coding of the random scattering medium and phase compensation of the spatial light modulation, the photoetching resolution is improved; and only one time of phase calibration process is required, the photoetching time efficiency is improved, and thus, the maskless photoetching of a controllable sub-wavelength pattern is achieved.

The invention relates to a receiver device of a high density electric method device, which is formed in the way that an upper computer is connected with a main controller and a three-channel 24-bit high speed analog-to-digital (A / D) synchronous conversion circuit. A high density electric method transmitter is connected with an electrode AB voltage collection conditioning circuit, the electrode ABvoltage collection conditioning circuit and an ABMN electrode port are respectively connected with an A electrode, a B electrode, an M electrode and an N electrode, the ABMN electrode port is connected with an electrode MN voltage collection conditioning circuit and respectively connected with an electrode 1, an electrode 2, an electrode 3... and an electrode N through an enhancement electrode conversion device. Compared with the prior art, the receiver device adopts the enhancement electrode conversion device, is capable of collecting any random coding wave form, synchronously collects analog signals of three channels, adds a collection channel for measuring AB electrode voltage, improves flexibility of the any random coding wave form and data analyzing processing accuracy, adds a port of an ABMN electrode collection channel, flexibly arranges and combines various electric method collection methods, improves detection depth, is convenient, improves efficiency and saves working time and outdoor measuring cost.

The invention provides an ultra-wideband pseudo-random encoding radar system. According to the system, a signal output from a transmitting channel is divided into two signals; one encoded signal is transmitted out by an antenna; the other encoded signal is directly acquired by a first receiving channel as a reference signal for use in pulse compression. Therefore, the fact that the two signals are generated and acquired at the same temperature can be guaranteed, uniformity of the two signals is guaranteed, post-pulse-compression peak-to-sidelobe ratio is increased, and the system has a wider detection range and higher detection probability.

The invention relates to an automobile radar cross-interference inhibition method based on hyperchaos coding. Through two-dimensional pseudorandom coding modulation based on a hyperchaos technology and performed on transmitted waveforms at a transmitting terminal, through utilization of a pseudorandom coding orthogonality characteristic, and through a reasonable decoding mode at a receiving terminal, the waveform transmitted by an own radar obtains a coherent accumulation gain, an influence of cross interferences, which are brought by waveforms transmitted by other radars, on the own radar is habited due to processing loss caused by coding irrelevance, and then the problem of an insufficient MFSK waveform cross-interference-resistance capability is solved.

The invention provides a transceiver networking radar autonomous time synchronizing system based on a pseudo random coding signal and a method thereof. The method comprises the steps of generating a sampling clock signal and a pulse repetition frequency signal which are required for radar transmission, thereby generating a radar synchronization signal, performing power amplification and radiating,wherein the radar synchronization signal comprises a monopulse signal, a short-code-element m-sequence modulating signal and a long-code-element m-sequence modulating signal; performing preprocessingand sampling on the received radar synchronizing signal, performing pulse compression processing on the direct wave signals of the short-code-element m-sequence modulating signal and the long-code-element m-sequence modulating signal, and calculating a highest value of a respective pulse response function; and calculating the time interval of the highest value of two or more adjacent long-code-element pulse response functions, and using the reciprocal of the time interval as the pulse repetition rate of the radar transmitting signal. The transceiver networking radar autonomous time synchronizing system and the method thereof can realize nanosecond-grade synchronizing precision and furthermore have advantages of low cost, low power consumption, high signal-to-noise ratio, high interferenceresistance, simple system structure, etc.

An optical signal multiplexer / demultiplexer using an orthogonal pseudorandom (PRN) coding scheme for optical mode modulation to produce a plurality of independent optical signals that may be combined into one multiplex signal for transmission over an optical fiber to the receiving end, where the multiplex signal may be demultiplexed by relying on the orthogonal properties of the PRN code to isolate each independent optical signal from the transmitted multiplex signal. In channels subject to mode modulation distortion, one of the signal components may be used as a pilot signal to obtain a correction for channel mode modulation distortion. The PRN optical signal multiplexer / demultiplexer is particularly useful with polarization mode modulation.

The present invention relates to a reconstructed low-frequency data frequency domain full-waveform inversion method based on a convolution idea and an accurate earthquake source. The method comprisesthe steps that: a reliable earthquake source function is inverted by employing direct wave components of observation data; low-frequency data of self-excited self-closing points is reconstructed basedon the convolution idea; and finally, the reconstructed data is applied to perform a low-frequency starting part of multi-scale full-waveform inversion to allow the inversion to have a good beginningand finally obtain a good result. The method provided by the invention effectively avoids occurrence of cycle skips, so that the inversion result is greatly improved, and minimum convergence of various errors is effectively recovered. An idea of a supergun of dynamic random coding is employed at the final inversion part, so that the efficiency of the full-waveform inversion is effectively improved. The reconstructed low-frequency information of the self-excited self-closing points are low-frequency information on the aspect of mathematics to provide large-scale disturbance for the full-waveform inversion, are real low-frequency information on the aspect of objective physics, and can be used for other data processing directions.

The invention discloses a single pixel laser calculation imaging device, comprising: an active illumination module used for performing illumination on a target scene to be imaged; a first imaging lensgroup used for performing converging imaging on illumination information reflected by the target scene; a DMD (Digital Mirror Device) modulation module used for generating a Gaussian random coding template matrix which is repeatedly coded, and performing random coding modulation on target scene information according to the Gaussian random coding template matrix to obtain a coded target scene signal; a second imaging lens group used for performing distortion correction and second imaging on the coded target scene signal; a data acquisition module used for performing acquisition and conversionon the coded target scene signal to obtain a total intensity value of the target scene information in two reflection directions; and a high-resolution calculation imaging module used for performing compressed sensing reconstruction operation on the total intensity value to obtain a high-resolution image. A single pixel laser calculation imaging method is also disclosed.

The invention discloses a scattering-controllable random coding meta-surface which is composed of coding units with a discrete reflection phase arranged according to a preset rule. The preset rule is specifically a hybrid coding matrix formed through superposition of a random coding matrix and a periodic coding matrix. The invention further discloses a scattering control method of the random coding meta-surface, which can be used to control and predict the scattering direction. The size of a random scattering distribution area can be controlled effectively, and thus, the amount of information carried can be controlled. A scattering image produced in the invention can be compared to the concept of electron cloud in quantum mechanics, contains a specific physical mechanism, and has a unique relationship with information coding. Predictably, the scope and quality of compressed radar imaging can be improved, and the meta-surface has a huge impact on conventional reflection materials and diffuse reflection materials based on microwave, optical frequency band and even acoustic frequency band.

The invention provides an anti-attack encrypting positioning method and device of a wireless sensor network. The method comprises: a process of sending the codes of a distance measuring message by a beacon node: carrying out Manchester coding to the distance measuring message k, obtaining a code word m; carrying out pseudorandom coding to data m, outputting a code b, sending out the code b through broadcast; and a process of receiving and decoding information by an unknown node: receiving the broadcast information, measuring the signal power Ri of the broadcast at the unknown node, carrying out amplitude limited filtering to the received information, obtaining a code b1; carrying out pseudorandom decoding processing to the code b1 according to a pseudorandom parameter, obtaining a code word m1; carrying out Manchester decoding to the code word m1, obtaining the distance measuring message k1; carrying out self positioning according to the distance measuring message k1 and receiving power R. According to the invention, completeness of the information is protected independent of the information encrypting technique; the anti-attack ability and information processing speed of the system are improved; and the energy consumption of the hardware is reduced.

The invention relates to a passive decoy state modulation reference system independent quantum key distribution system and method, and belongs to the technical field of quantum cryptography. The system comprises a transmitting end Alice signal preparation device and a Bob signal receiving and measuring device, wherein the transmitting end Alice signal preparation device comprises two pulse lasers Laser1 and Laser2, a beam splitter BS, a coding module and a threshold single-photon detector D0. The method comprises the following steps: describing QKD system parameters, and calculating a probability distribution rule of an Alice output signal of the transmitting end to determine a decoy state marking condition; respectively inputting a signal state and a decoy state into a coding module for modulation, wherein the coding module randomly selects one of three groups of mutually unbiased bases and codes key information on two intrinsic quantum states of each group of bases, a random coding mode is adopted and the result is sent to a receiving end Bob for measurement, base pairing screening, error correction and confidential amplification. The capability of the system for resisting rotation of a reference system is improved, and the overall key distribution performance is improved.