53results about How to "Optimize the total calculation amount" patented technology

The present invention discloses a identity-based authentication group key management method which comprises the following steps: embedding ID into key with bilinear pairing in elliptic curve; generating Ci as part of main key ui according to the secret key and ID of group member ui by key generating center, and transmitting the Ci to ui through overt channel; generating main key according to Ci and its own secret key by each group member ui; calculating overt key verification information according to Hash value of main key and over key by each group member, and broadcasting the link between over key and verification information inside the group; calculating the secret value sharing with left and right neighbors when the received information is verified to be true by each group member, and calculating the group member information Xi included in group session key according to the secret value, and then broadcasting the Xi inside the group; calculating group session key K according to all Xj, j=1, ...,n, by each group member. The invention has the advantages of no key escrow and no need of secure channel, which can be applied in coordination and distributed network as secure reliable group communication.

The invention discloses an authenticated encryption method and a system, relating to the field of communication security. The restorable signature of a message and the symmetric encryption technologyare combined; a commitment value which only can be calculated by a designated message receiving end is used as a session key encryption message; and the message receiving end validates the validity ofthe message by the restorable signature, thus realizing encryption and authentication in one logical step. A key generation unit of a sending end generates a session key of the sending end; an encryption unit encrypts a message to be sent; the receiving end generates a session key of the receiving end; a decryption unit utilizes the session key of the receiving end to decrypts the encrypted message; and the authentication and confirmation message is generated according to the decrypted message, thus validating the validity of the message. When disputes occur, the message receiving end transforms the authenticated and encrypted message signature into a common signature so as to lead a third party to validate the validity of the signature. The invention has the advantages of high security,low calculated amount and transmission cost, and the like.

The invention provides a numerical control system-based tool radius compensation vector calculating method which comprises the steps of: judging different switching-over types through analyzing the distribution condition of a vector angle of a tangent line on the switching-over point of a processing segment on a plane coordinate system, and calculating the coordinate point after cutter compensation according to a specific computing method; analyzing the processing segment according to the information of the tool radius, the cutter compensation direction and a workpiece outline coordinate point and the like after collecting and processing the information of a to-be-processed workpiece, calculating vectors of two tangent lines on the switching-over point, and obtaining a switching-over angle of two straight lines according to the vectors of the two tangent lines, drawing the distribution condition of the switching-over angle in the plane coordinate system, and judging the switching-over type of the two straight lines so as to figure out coordinates of the switching-over point by adopting a vector calculating method; and sending information of the coordinates to a numerical control system for next step of interpolation. The numerical control system-based tool radius compensation vector calculating method has the advantages of being simple in calculating method and small in calculating quantity, and being beneficial to the realization of programming especially for the calculation of the switching-over point, thereby increasing the processing efficiency.

The invention discloses a big data security protection cloud system based on trusted calculation. The big data security protection cloud system constructs a security configuration system based on a trusted security grading system and minimal trees on the basis of systems having security grading functions and trusted security configuration functions, and provides a trusted calculating environment for the security protection of information through the cooperation with a security network monitoring system. The trusted protection cloud system starts from the acquisition and security grading of basic data, divides the network nodes into four different security grades by calculating the importance values of the network nodes, and constructs an integral trusted environment, and by means of the security grading configuration with high credibility, the trusted security of information security and protection is guaranteed, the data cannot be acquired randomly, and a good balance between the calculated quantity and trusted security configuration is achieved.

The invention discloses a wireless transmitter recognition method based on a multi-core double-channel network, and belongs to the field of electromagnetism. The method specifically comprises the following steps: firstly, performing power amplification on a modulation signal through a transmitter, transmitting the modulation signal to a receiver for sampling and receiving, performing statistical characteristic processing on a received signal to obtain a cyclic spectrum, and extracting a high peak density value in the cyclic spectrum as a characteristic; then, inputting all the characteristic values into a fully connected multi-core double-channel network module, learning the characterization characteristics of each transmitter from the cyclic spectrum, and fusing the obtained result unionsets; after a multi-core double-path network model is trained, the fused feature result is tested, and normalized feature vectors corresponding to all test features are obtained; and obtaining a probability value corresponding to each feature through a softmax classifier, and selecting the wireless transmitter with the maximum probability value as the final wireless transmitter to be identified and classified. According to the method, the calculation complexity is simplified, and the situation that the classification effect is not ideal due to noise interference is reduced.

The invention belongs to the technical field of automobile electronics, and discloses a pre-warning method for automobile parking door opening and based on image processing. The pre-warning method comprises the steps that target identification and classification are conducted on images in a pre-warning area; the moving speed of a target and the moving time of a target needed to collide with an automobile are calculated; and the moving time and the moving speed are compared with the pre-warning calibration time and speed of different categories of targets to determine whether pre-warning is issued or not. The pre-warning method for automobile parking door opening and based on image processing utilizes SIFT feature extraction technology to quickly identify vehicles and pedestrians and the like in the pre-warning area, the calculation speed is high, and stability is high; and the binocular vision ranging technology can be utilized to accurately measure the distance and collision time of the passed vehicles, pedestrians and the like with the automobile, the calculation amount is greatly optimized, environment information of the rear part of the automobile can be processed in real time,almost no delay occurs, and a reliable pre-warning system is provided for parking door opening.

The invention relates to a gear residual life prediction method based on MMALSTM, and belongs to the field of big data and intelligent manufacturing. The method comprises the following steps: firstly,simplifying and fusing high-dimensional features of acquired gear vibration signals; then using the fusion feature information subjected to dimension reduction for multi-step prediction of MMALSTM, and performing macro and micro processing on the fusion feature data by adopting MMA according to the characteristic that different feature information contains different information amounts; and finally, amplifying the weights of the input data and the recursive data according to the result of the MMA, and performing automatic and different degrees of processing on the fusion feature data. The prediction speed and precision of the residual life of the gear can be improved while the calculated amount is reduced.

The invention discloses a method of synchronizing precise timing of a DVB-T2 (Digital Video Broadcasting-Terrestrial 2) system. The method comprises the steps: extracting the pilot frequency of a first P2 symbol in the received T2 frame, performing pseudo random sequence correction, and carrying out IFFT (Inverse Fast Fourier Transform) to obtain channel impulse response; according to the average power and envelope of the channel impulse response, separating the effective path in the channel impulse response; making relation with a time domain P2 signal by using the time domain signal of the locally generated P2 pilot frequency according to the position of the effective path in the channel impulse response and the imaging position of the effective path, analyzing and judging the true position of the path in the channel impulse response; judging the characteristic of a channel by judging whether a path exists before a main path of a CIR, thus regulating the window of FFT (Fast Fourier Transform) in time domain by utilizing the minimal intersymbol interference principle. By utilizing the method, the computation amount and locking time can be greatly reduced, the synchronization accuracy of the precise timing can be improved, and the power consumption of the DVT-T2 system can be decreased.

The invention discloses a method for estimating parameters of expectation maximization in a Gaussian mixture model. The method improves the specific calculation process of the EM algorithm on the basis of sample clustering, and provides the estimation of three parameters of w, μ and ∑ method, making it suitable for sample reduction and the input parameters of GMM are fuzzy color features. Due to the reduction in the number of samples, the parameter estimation process will not introduce unnecessary noise, thereby improving the accuracy of parameter estimation; due to the reduction in the number of samples, the improved EM algorithm is also improved in terms of storage capacity, calculation capacity, and running time. , which is beneficial to improve the efficiency of parameter estimation.

The invention discloses a universal killing area calculation method and a universal launching area calculation method. The method can be well applied to killing area calculation of various tactical types and various target types, so that a killing area is quickly and efficiently modified in different stages of type research and development. The method abstracts various killing area boundary calculation methods and extracts common parts for establishing a universal mathematic model, thereby realizing complete isolation of killing area boundary parameters and an algorithm model. As only the killing area boundary parameters are different for different tactical types, the required killing area can be obtained by only changing initial parameters. The algorithm well solves the problems of an existing killing area in incompatibility among different types, incompatibility among different target types and complex and low-efficiency killing area calculation after change of boundary parameters, has the advantages of quickness, high efficiency, high universality and the like, can effectively reduce research and development expenditures and manpower resource costs, and can meet the requirements of killing area calculation of weapon systems of different tactical types.

The invention provides a cultural relic classification method based on a lightweight deep learning network, and the method comprises the steps: firstly constructing a data set for the classification of cultural relic images, and then dividing an original cultural relic image data set into a plurality of relatively independent small data sets through employing a coarse-grained clustering neural network, for each small data set, using a lightweight neural network classifier designed by the invention to classify data, and finally, using an energy prediction model to measure whether the CNN model can be deployed on a device with limited resources. According to the method, the model structure can be simplified, the training speed can be increased, the reusability is higher, the precision and the calculated amount can be better balanced, and the method is suitable for being deployed on equipment with limited resources.

The invention relates to a gear residual life prediction method based on LSTMPP, and belongs to the field of big data and intelligent manufacturing. The method comprises the steps of firstly, simplifying and fusing high-dimensional features of collected gear vibration signals; then using the fusion feature information subjected to dimension reduction for multi-step prediction of an eccentric longshort-term memory network LSTMPP, and performing eccentric processing on the fusion feature data by adopting an attention mechanism method according to the characteristic that different feature information contains different information amounts; and finally, amplifying the weights of the input data and the recursive data according to an eccentric processing result, and performing automatic and different degrees of processing on the fused feature data. The prediction speed and precision of the residual life of the gear can be improved while the calculated amount is reduced.

The invention provides preparation technology of fresh pickled cowpea. The technology comprises the following steps: step A, preparing pickle liquid I and pickle liquid II for later use, wherein the difference between the pickle liquid I and the pickle liquid II is that Gaofuji Paolemei Lactobacillus Powder is added in the pickle liquid I while no Gaofuji Paolemei Lactobacillus Powder is added in the pickle liquid II; step B, circulation fermentation, namely fermenting vegetable cowpea by the pickle liquid I prepared in step A, so that the fresh pickled cowpea is obtained; when performing the 4n times of fermentation, the pickle liquid after the 4n-time fermentation is used again for fermenting the cowpea after sequential processes such as centrifugation, water-losing and the like, wherein the n is selected from continuous positive integers; and the fermentation is carried on at 20-24 DEG C for 40-65 hours. According to the technology, the pickle liquid preparation and the circulation fermentation control are utilized, especially the addition of the Gaofuji Paolemei Lactobacillus Powder into the pickle liquid and the controls to the parameters and indexes in the circulation fermentation process are performed, so that the preparation time of the fresh pickled vegetables is shortened and the quality and taste of the fresh pickled vegetables are improved; thus, the technology is suitable for large-scale production and promotes development of the pickled-vegetable industry; moreover, the technology is relatively good in economic benefit.

The invention discloses a management method of self-certified public key of a mobile self-organized network on the basis of ECC, comprising the following steps: a shared key is distributed to n virtual central nodes by threshold cryptology; a user chooses a secret random number to calculate a public parameter, and identity and the public parameter are sent to a nearby virtual central node A1; A1 contacts with other virtual central nodes and sends the user information to the nodes; each publisher Ai chooses a random secret integer and calculates as well as broadcasts a self-certified public key subblock Qi to other publishers according to the secret integers and parameters published by the user; each publisher Ai calculates a self-certified public key Q, a sub-signature xi and an intermediate quantity Ri and sends (r, I, xi and Ri) to a synthesizer; the synthesizer calculates and synthesizes a signature x after all sub-signatures are qualified after authentication and sends Q and x to the user; the user calculates a secret key s according to the x; and the authenticity of the self-certified public key of the user is verified. The invention has no certificate management, no key escrow and no secure channel, so that the invention is suitable for the safe communication of the mobile self-organization network with limited resource.

The invention discloses an intelligent identification method for a tangram toy. Internet equipment, a base, a reflector, a splicing base plate and an application software unit in the Internet equipment are adopted as identification tools; a mobile phone is inserted into a groove of the base, a reflector lens is horizontally installed at the lower end of the shell, and the shell is clamped on the front side of the upper portion of the mobile phone and located on the upper portion of a mobile phone camera. The base plate is positioned at the front end of the base. The application software unit comprises a calibration module, a game process module, an instruction module, an image processing module and a reward module. Identification is divided into eight steps. The method is based on the AI technology, the color of each tangram serves as the judgment basis of the placement position and shape, whether the position and pattern of the single tangram placed in the corresponding area of the base plate are correct or not is directly obtained according to the colors, the calculation amount is reduced, the steps are few, and the probability of image recognition errors is correspondingly reduced; and the method overcomes the defects that an edge matching method adopted in the prior art is large in calculated amount and large in number of steps. Based on the above, the method has a good application prospect.

A pedestrian positioning and track acquisition method based on a camera video stream is characterized by sequentially comprising two steps: 1, a feature extraction and detection algorithm of an indoortarget person; wherein the pedestrian detection module is used for performing pedestrian detection on each frame of image of a camera video stream; 2, a pedestrian position information and a moving track acquisition algorithm thereof; wherein the algorithm is used for acquiring position information and moving tracks of pedestrians detected in each frame of image of a camera video stream. According to the method, the space models of the indoor camera and the pedestrian are established, the related models are established from the vertical section and the horizontal section of the pedestrian respectively, the established models are simple and efficient, the required calculation amount is small, the accuracy of the acquired position information is high, the calculation force can be saved, thetime consumption is reduced, and the real-time performance is ensured.