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338results about How to "Fast operation" patented technology

An online classroom atmosphere assessment system and method

The invention provides an online classroom atmosphere evaluation system and method. The evaluation system comprises a video stream collection module, a data stream processing module, an image analysismodule, a classroom attendance analysis module, a classroom atmosphere evaluation module, a classroom atmosphere scoring module and a display module; . The invention collects classroom video stream data through a camera, and the captured video is captured frame by frame to obtain images; all the faces images are segmented and numbered sequentially, at the same time, the eigenvalues are assigned to the faces with the corresponding numbers, and then face recognition and facial expression recognition are carried out according to the number, so as to identify the number, emotion and movement posture of students in the video stream data; the score 0 is given to the students lowering heads in the image and the score 1 is given to students having interaction; according to the emotional analysisstrategy of students listening to the teacher, the current student listening student score is obtained and finally comprehensive evaluation of the classroom atmosphere score is obtained. The inventioncan evaluate the classroom quality on-line and in real time, and can effectively improve the evaluation effect.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY

MD5-code-based method and system applied to backup and reduction of application program data

The invention discloses an MD5-code-based method applied to the backup and the reduction of application program data. The MD5-code-based method applied to the backup and the reduction of application program data comprises the following steps: S1, backing-up and storing the application program data, namely calculating the MD5 values of all files associated with an application program by virtue of an MD5 information abstract algorithm, then backing-up and the storing the MD5 values of the files associated with the application program, the version number of the application program, names of all the relevant files and directory paths of the files on a cloud server; and S2, downloading and restoring the application program data, namely updating the application program, downloading and restoring the application program data when a user opens and uses account information to log in the application program at another intelligent mobile terminal. The method is capable of accurately calculating the difference between data files; when the backup and reduction of the data are carried out, the data traffic for uploading and downloading the data files can be saved; the operation speed of the backup and restoration can be increased; when the version number of the application program is inconsistent, a reduction path from the application program to a previous version can be provided.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Distributed sub-array wave arrival direction estimation method

The invention discloses a staggered base line angle measurement method based on a distributed sub-array. The problem that the angle is fuzzy in the distributed sub-array wave arrival direction estimation process is mainly solved. The method comprises the following implementation processes of: extracting a target signal from a radar echo; performing coarse angle measurement on a target signal by using a digital beam forming method; dividing the sub-array, equally dividing each sub-array into two novel sub-arrays, forming four novel sub-arrays, generating four base lines, and constructing a staggered relationship by two base lines selected from the four base lines; performing beam forming on the four sub-arrays, and calculating a phase difference observation value of the two base lines; calculating a value range of a fuzzy number by utilizing the constructed staggered relationship; and introducing a cost function, solving the fuzzy number by utilizing the minimum mean square error criterion, and solving the cost function value by utilizing the fuzzy number, so as to obtain a target wave arrival angle. The operation amount is reduced by adopting the processing method for constructing the difference of the two base lines, the calculation speed of the target arrival angle estimation is increased, and the method can be used for target identification.
Owner:XIDIAN UNIV

Multi-angle drilling device

The invention relates to a multi-angle drilling device. The multi-angle drilling device comprises a fixing frame provided with a base. The fixing frame is provided with a sliding rail and an electric drill fixing platform which moves up and down along the sliding rail. The electric drill fixing platform is transversely arranged, the left end and the right end of the electric drill fixing platform are of a shaft structure, and shaft parts of the two ends are coaxial and are connected to sliding bases of the sliding rail through bearings. The electric drill fixing platform is provided with a tray for fixing an electric drill and a feeding unit used for driving the tray to move front and back on the electric drill fixing platform. The device is adjusted to a proper height through ascent and descent, the angle of the fixing frame in the horizontal direction is adjusted, the electric drill fixing platform is rotated to adjust the angle in the vertical direction, and thus through the adjustment in the three aspects, an electric drill bit can rapidly arrive at an accurate position of a hole to be drilled, then the electric drill is started, and the feeding unit is used for performing drilling operation. The angle adjusting structure is simple, moving and angle adjusting operation is rapid, and the drilling efficiency is high.
Owner:ZHEJIANG GEELY AUTOMOBILE +2

Signature authentication system and method based on SM2 encryption and decryption algorithm

The invention relates to a signature authentication system and a signature authentication method based on an SM2 encryption and decryption algorithm. The system comprises a software module and a hardware module; the hardware module comprises an operation module, a register and a random number generator; the random number generator generates a random number, a symmetric key, a public key and a private key of a sender and the public key and the private key of a receiver applied to the algorithm; the operation module is used for operating SM2, SM3 and SM4 algorithms during encryption and decryption process; the software module is used for achieving a signature authentication function; and the register is used for being accessed by the software module so as to schedule the operation module. According to the system and the method provided by the invention, the random number generated during a signature authentication process is generated by the random number generator, so that data security is greatly improved; the operation part is implemented by the hardware module, the software module achieves the signature authentication function, and thus the method is greatly improved in operation speed by cooperation of hardware and software compared with the method only using the software; compared with inoperability of the method only using the hardware, the method has stronger controllability, programmability, transportability and compatibility.
Owner:GUANGDONG UNIV OF TECH

Order withdrawing processing system and method

InactiveCN103914776AReduce system couplingFast operationCommerceProcessing InstructionUser oriented
The invention discloses an order withdrawing processing system and method. The order withdrawing processing system comprises a synchronization server, an asynchronization server and an operation platform. The synchronization server comprises a receiving end and a processing end, and a plurality of user-oriented units are connected to the processing end in series. The asynchronization server is provided with a plurality of merchant-oriented units. The receiving end of the synchronization server receives the order withdrawing operation of a user, the order locking information of the user is generated and sent to the processing end, the processing end conducts user-oriented information processing according to the respective functions of the user-oriented units sequentially, an order withdrawing instruction is generated after processing is over, and the order withdrawing instruction is sent to the operation platform. After the synchronization server generates the order withdrawing instruction, a backstage processing instruction is sent to the asynchronization server, the asynchronization server conducts merchant-oriented information processing according to the respective functions of the merchant-oriented units in sequence, and the entire processing process is calibrated after processing is over.
Owner:BEIJING JINGDONG SHANGKE INFORMATION TECH CO LTD

Partitioning method and device for endoscope fluorescence image and storage medium

The invention provides a partitioning method and device for an endoscope fluorescence image and a storage medium. The method comprises the steps that a convolutional neural network is acquired, wherein the convolutional neural network is obtained in the mode that a part of image is randomly selected from a collected fluorescence image to serve as a training set, a target image of interest is partitioned from the selected image, a tag is added to the target image, and an image bock with a pixel point exceeding a set threshold being the center in the training set and a tag of the image block areinput into a neural network for training; and the to-be-processed endoscope fluorescence image is acquired and input into the convolutional neural network, and an image partitioning result is obtained. According to the method, the convolutional neural network is utilized to convert a partitioning problem of the optical operation navigation endoscope fluorescence image into a dichotomy problem ofimage pixel points; and through continuous training and optimization of a whole system, inhomogeneity of the optical operation navigation endoscope fluorescence image is effectively overcome, and thetarget of interest in the image is accurately extracted.
Owner:BEIJING DIGITAL PRECISION MEDICAL TECH CO LTD

Prediction method of badminton landing position based on computer vision

InactiveCN109087328AFast operationFor real-time applicationsImage enhancementImage analysisComputer basedBadminton court
The invention relates to a badminton landing position prediction method based on computer vision. According to a video frame picture obtained from a badminton match video, the perspective transformation relationship between a badminton field and a model field in the video frame picture is calculated according to the video frame picture obtained from the badminton match video, and a badminton fieldmodel is determined. Then the motion region detection module uses the time difference method to distinguish the motion region and the background part. Binary image processing, image segmentation, contour tracking are performed on a difference image and then the characteristic information of badminton is extracted; the flight trajectory of badminton is determined by trajectory tracking algorithm;Kalman filter algorithm is used to predict the trajectory location of badminton. According to the location of trajectory falling point, the coordinate of actual badminton court is transformed by perspective transformation, so as to realize the prediction of the location of badminton falling point. The method can be used to predict the badminton landing position in the complex scene when the illumination changes gradually, the wind speed influence, the airflow influence or the badminton speed is very fast.
Owner:HUBEI UNIV OF TECH

Multi-point touch identification method for infrared touch screen

InactiveCN103365492AAccurate confirmationFast operationInput/output processes for data processingOptical pathOblique Axis
The invention discloses a multi-point touch identification method for an infrared touch screen, which comprises the steps of determining a rectangular plane coordinate system by taking one corner of the touch screen as the origin of coordinates; scanning the infrared germinate transistors on the screen in the X axis and Y axis directions of the rectangular coordinate system, forming orthogonal light paths according to the shield signals of touch points, and primarily determining the touch point by the crossing point of the orthogonal light paths; performing oblique axis light path scanning in the X or Y axis, and calculating the linear distance between the lowering points, wherein crossing lines are formed by the oblique axis light path at the crossing point of the orthogonal light paths in the X or Y axis and the lowering points are formed by the crossing lines at an infrared receiving tube; and determining the position of the real touch point according to the crossing point of the orthogonal light paths and the linear distance between the lowering points. The multi-point touch identification method for the infrared touch screen has the advantages of accurately determining the real touch point by scanning the primarily determined point by an oblique axis light path scanning mode, and being fast in computing speed without causing errors due to the abnormity of a certain LED (light emitting diode) on the touch screen.
Owner:陈云波

Neural network convolution operation device and method

The invention discloses a neural network convolution operation device and method. The device is used for realizing convolution operation of a weight value matrix and a neural element matrix in a neural network via a matrix multiplication manner, and comprises a displacement operation unit, a matrix multiplication operation unit and a controller, wherein the displacement operation unit is used forrespectively carrying out winograd transformation on the neural element matrix and weight value matrix so as to obtain a transformed neural element matrix and a transformed weight value matrix; the matrix multiplication operation unit is used for carrying out a matrix multiplication operation such as counterpoint multiplication on the transformed neural element matrix and the transformed weight value matrix so as to obtain a multiplication matrix; the displacement operation unit is furthermore used for carrying out winograd inverse transformation on the multiplication matrix so as to obtain aconvolution operation result; and the controller is used for controlling the displacement operation unit to carry out the winograd transformation or the winograd inverse transformation, and controlling the matrix multiplication operation unit to carry out the matrix multiplication operation.
Owner:SHANGHAI CAMBRICON INFORMATION TECH CO LTD

Montgomery modular multiplication method and circuit thereof

InactiveCN103226461AFast operationReduce time complexityComputations using residue arithmeticFor loopIntermediate variable
The invention relates to a Montgomery modular multiplication method and a circuit thereof. In the method, a modular length k=sw, wherein w is a word size processed each time by an algorithm, and s is the frequency required by the circulation of the algorithm for; input parameters include a, b and a modulus n; r is a memory, a high k place is used for accommodating the input parameter a and an r2 of an output result, and a lower k place is used for accommodating an r1 of the input parameter b; t is a temporary calculation result of a polynomial, and the rest is intermediate variables. Calculation steps are as follows: calculating according to a formula that r2=MonPro(a,b,n)=a*b*2<-k> mod n, assigning zero for t and i, ensuring that r32=r[i], supposing the i to be 0 and starting external circulation, calculating according to formulae as follows: (c,z1)=t[i]+r[i]*r32, (c, z1)=z1*n0', x2=z1 and x1=r[i], supposing j to be 0 and starting the internal circulation, calculating according formulae as follows: (c, t[i+j])=t[i+j]+x1*r[i]+x2*n[i]+c and t[i+s]=c, adding 1 to the variable j, repeating the internal circulation when the j is smaller than the s, and quitting the internal circulation otherwise, adding 1 to the variable i, repeating the external circulation when the i is smaller than the s, and quitting the external circulation otherwise, judging whether the high k place of the t is larger than n, if yes, enabling that r2=r2-n and assigning the low k place of the t to the r2 otherwise, and outputting a modular multiplication result according to the r2. According to the method and the circuit thereof, the calculating speed of the algorithm can be increased, and the power consumption is reduced.
Owner:SUN YAT SEN UNIV
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