388results about How to "Random" patented technology

A data encryption and decryption method and an apparatus thereof, and a communication system are disclosed. The data encryption method comprises the following steps of segmenting data to be encrypted and generating a segmented data; aiming at the data to be encrypted, randomly selecting an encryption algorithm; randomly generating a secret key corresponding to the encryption algorithm; using the encryption algorithm and the secret key to encrypt the data to be encrypted so as to acquire the encrypted segmented data; packing the encrypted segmented data to acquire an encrypted segmented data block; and combining and packing the encrypted segmented data block to acquire a final cryptograph. By using the encryption method, cracking difficulty is increased and safety of the data encryption method is increased.

The invention relates to a voice signal quantum encryption communication system based on a random number, which comprises terminal equipment, a quantum communication access point, a quantum communication gateway and a quantum communication access point, wherein the terminal equipment consists of a terminal sending subsystem and a terminal receiving subsystem; the terminal sending subsystem comprises a quantum key agreement and management module, a voice signal encoding module, a random number generation module, a voice encryption module and a digital modulation module; and the terminal receiving subsystem comprises a voice signal decoding module, a quantum key agreement and management module, a voice decryption module and a digital demodulation module. One piece of terminal equipment simultaneously comprises the terminal sending subsystem and the terminal receiving subsystem. According to the invention, the terminal sending subsystem is applied to send a voice signal with good encryption performance and high anti-interference performance and meanwhile, the terminal receiving subsystem is utilized to receive and reduce the voice signal, so that safety and integrity in the communication process are ensured.

The present invention provides a controller regional network bus safety communication method, device and system which can effectively withstand attackers' eavesdropping, injection and attack replay. Agateway ECU (Electronic Control Unit) generates a random number and sends the random number to at least one CAN (Controller Area Network) bus ECU. A first CAN bus ECU obtains the random number sent by the gateway ECU and generates a first information authentication code based on secret keys of a first CAN identifier, the random number sent by the gateway ECU, a counting value of the first CAN identifier and data of a first CAN message. The first CAN bus ECU performs encryption operation based on the secret keys of the first CAN identifier and a second CAN message to obtain a first encryptionoperation result and perform equal length encryption operation for the first encryption operation result, the first information authentication code, the counting value of the first CAN identifier andthe data of the first CAN message so as to obtain the first CAN message with encryption authentication and send the first CAN message with encryption authentication.

The invention discloses a two-dimensional code production method for a wine bottle, and belongs to the field of bar code production, for solving the problems of logistics node management, fake and inferior products, out-zone sale and the like in the industry of liquor. Two-dimensional codes are generated by an encryption algorithm and are obtained through secondary encryption, verification and checking through a system, two-dimensional code pictures are generated, each product is endowed with a code, according to a three-level association sequence of bottles, boxes and pallets, the unique two-dimensional code of each wine bottle is acquired on a liquor filling streamline through a gatherer for association, and then the two-dimensional codes are enabled to be associated with such information as product specifications, production time, production batch numbers, groups, dealers, sale orders, delivery orders and the like through production scheduling and delivery, such that tracing of the quality of products in the whole life period, counterfeiting prevention, out-zone sale prevention, logistics monitoring, sale data monitoring, product stock monitoring and establishment of a basis of consumer group terminal client data can be realized, and vast users can rapidly and conveniently participate in quality tracing supervision.

The invention provides a system for achieving dynamic wireless constant power charging and a control method for the system. The system comprises an energy transmitting module, an energy receiving module and a constant power tracking control module, wherein the energy transmitting module is used for converting a primary direct current power supply into high-frequency alternating current electrical energy and transmitting the high-frequency alternating current electrical energy in a high-frequency magnetic field coupling manner; the energy receiving module is used for receiving electrical energy and supplying the electrical energy to a load; the constant power tracking control module is used for obtaining a reference control signal according to charging current collected in real time, and adjusting voltage of a rectifying port into a reference control signal to achieve a constant power tracking control. With direct current output by a DC/DC converter at a secondary side as feedback quantity, direct current voltage of an uncontrollable rectifier terminal is disturbed by a perturbation and observation method-based constant power tracking control method; and a transmission voltage gain from the primary side to the secondary side always works on a voltage gain point corresponding to a transmission power extreme point, so that the condition that the system transmits the electrical energy at constant power is ensured, and the output power is kept stable.

The invention relates to a self-adapting characteristic extracting method for optical texture images and synthetic aperture radar (SAR) images, which comprises the following steps of: learning sampling positions for a plurality of images in a training set so as to continuously learn out sampling distribution; sampling and coding image blocks for the learned sampling distribution by utilizing self-adapting filtering, and extracting self-adapting characteristics; and combining the self-adapting characteristics and original local binary pattern (LBP) characteristics in series, i.e. describing the self-adapting texture characteristics of the images. According to the self-adapting characteristic extracting method for the optical texture images and the SAR images, the distribution characteristic and the spatial characteristic of images are fused, and the prior knowledge of the images is utilized for learning. Therefore, the defect of sampling fixity of common LBP characteristics is overcome by the randomness of self-adapting sampling, and the classifying correctness of optical texture images and SAR images is enhanced so as to enhance the accuracy of the image processing application of classifying, dividing and the like based on texture characteristics.

The invention discloses an information processing method and device. The information processing method comprises the steps of pre-storing a mapping relationship between multiple encryption modes and encryption mode identification information at a sending end and a receiving end of information; selecting one of the multiple encryption modes for encrypting to-be-sent data by the sending end so as to obtain encrypted information and sending the encrypted information and the identification information corresponding to the selected encryption mode to the receiving end; and determining a decryption mode based on the received identification information and the pre-stored mapping relationship and decrypting by the receiving end. In the embodiment, the encryption mode for the information is not single and fixed, but is determined randomly from the multiple encryption modes in each interaction process, so that the encryption mode of the information has randomness and is difficult for a third party to break. The security of information interaction is improved, the privacy and benefit of two parties carrying out the information interaction are guaranteed and the user experience is enhanced.

The invention provides a ship route navigational speed multi-task comprehensive optimization method. The ship route navigational speed multi-task comprehensive optimization method includes the steps:obtaining basic information including meteorological and sea conditions, geographic conditions, a recommended initial route and ship basic information during navigation; preprocessing the data; dividing each route segment of the recommended route at equal longitude; obtaining a plurality of equal division points as to-be-optimized steering points; establishing a multi-objective optimization modelwith a wave height penalty function by taking oil consumption and navigation time as objectives; and inputting related data into the model, solving the model by using a multi-objective evolutionary algorithm, obtaining a Pareto solution set of the optimal air route by adjusting the latitude position of each steering point to be optimized and optimizing the water navigational speed of each segment,and finally obtaining the optimal air route according to the requirements of a client. Compared with a traditional route optimization method, the route optimized through the ship route navigational speed multi-task comprehensive optimization method can effectively avoid meteorological severe areas, navigation risks are reduced while navigation oil consumption and navigation time are optimized, and navigation cost is reduced.

The invention discloses lithium ion battery slurry and an assessment method of stability thereof. The lithium ion battery slurry comprises battery negative slurry and battery positive slurry which arematched with each other; the battery negative slurry is prepared by adopting the following methods: respectively weighing artificial graphite or artificial mixed natural graphite, acetylene black, CMC and SBR, weighing solvent deionized water, firstly adding the CMC into the solvent deionized water, stirring and dispersing to obtain uniform and transparent glue solution; adding conductive agent acetylene black, stirring and dispersing; adding the artificial graphite to continuously stir; and finally adding SBR to stir to obtain the battery negative slurry. The method disclosed by the invention is simple in operation step, scientific, accurate in result, and capable of providing reference basis for the stability of the slurry.

The invention relates to a method for predicating an underground fault of a sucker-rod pump oil pumping well on the basis of a multivariable grey model. The method comprises the following steps of: collecting a ground indicating diagram by an indicating diagram remote data collecting system; converting the ground indicating diagram into an underground pump indicating diagram; extracting a curve moment feature vector capable of representing the graphic feature of the underground pump indicating diagram according to the curve moment theory; predicating each feature vector by the multivariable grey model; and calculating the grey correlation degree of each fault type in predicating samples and standards sets, wherein the fault type corresponding to the maximum grey correlation degree is the fault type of the predicating samples. The working system of the oil pumping well can be reasonably regulated, so that the production efficiency of the oil pumping well is improved, and the fault predication on the underground work condition of the sucker-rod pump oil pumping well can be realized; the calculation is simple, the required samples are few, and the model is applicable to data sets in any distribution; and the prediction accuracy is high, and particularly, the prediction precision on the gradually varied fault type is high.

The invention relates to a block chain-based gambling method and device, a computer device and a storage medium. The method includes: obtaining the transaction situation in which the user uses the pass to redeem the lottery share; recording transactions in blocks in which users redeem lottery shares with pass cards; screening effective transaction case uplink; judging whether the time for exchanging lottery shares is shorter than the preset time; if not, the last transaction of the uplink is obtained; calculating the winning number based on the last transaction; selecting the winning account and the non-winning account are selected according to the winning number; issuing passes to non-winning accounts; distributing prizes to winning accounts. The invention uplinks the effective transaction situation, Avoid dark box operation and non-conforming transactions, and process the last transaction of the chain with block high hash value to obtain the winning number. The hash value has randomness, which can improve the randomness and fairness of the gambling, and can increase the interest of the gambling by issuing the total number of general certificates to the non-winning accounts.

The invention discloses a hill encryption and dynamic DNA coding based image encryption method which is used for solving the problem that an existing image encryption algorithm is too complex and is liable to crack. The hill encryption and dynamic DNA coding based image encryption method is characterized in that a hill encryption matrix is constructed to perform replacement encryption on an imageby adopting a method combining a hyperchaotic system with an elliptic curve, so that strong dependency among elements is avoided, and complexity and difficulty in realizing of elliptic curve encryption are avoided, and therefore, the encryption algorithm is simple; a dynamic DNA coding rule is combined, and the coding rule is randomly selected according to different positions of pixels for performing DNA coding on the pixels, so that safety of the encryption algorithm is improved, and dependency among secret keys is reduced, therefore, a ciphertext is difficult to crack; and finally, a hyperchaotic sequence is used for scrambling the image. The hill encryption and dynamic DNA coding based image encryption method improves secret key sensibility, safety of transmitted data, further can effectively resist known plaintext and selected plaintext attack, has relatively good ability of resisting exhaustive attack, statistical attacks and differential attacks.

The invention discloses a spiral sampling device. The spiral sampling device comprises a spiral outer barrel, a spiral sampling head arranged in the spiral outer barrel, a spiral blade arranged at the periphery of the spiral sampling head, a drilling bit fixed on the spiral sampling head, a splitting hole, a reserved sample hole, a material discarding pipe, a reserved sample cabin, a first driving device and a second driving device, wherein the splitting hole and the reserved sample hole, which are the same in size, are formed on the outer side of the spiral outer barrel at the same height, the reserved sample hole and the splitting hole are uniformly distributed along the circumference of the spiral outer barrel; and the material discarding pipe is connected with the splitting hole, and the reserved sample cabin is connected with the reserved sample hole. According to the spiral sampling device, the splitting hole and the reserved sample hole are formed at the same height of the spiral outer barrel, and the material can enter the splitting hole and the reserved sample hole randomly when positioned at the height; the splitting hole and the reserved sample hole are the same in size, and different materials can enter the splitting hole and the reserved sample hole randomly; and according to the spiral sample device, accurate splitting ratio can be provided and the sampling operation has randomness.

The invention provides a product anti-counterfeiting method used for the field of product anti-counterfeiting. According to the product anti-counterfeiting method, a two-dimensional code scanning technology and an internet technology are mainly utilized, a label pasting and identifying region is then arranged on a product which is going to leave a factory, and an image of an anti-counterfeiting label pasted in the label pasting and identifying region is obtained and used as an anti-counterfeiting image, so that the anti-counterfeiting safety of labels is enhanced, and the consistency between the anti-counterfeiting label on the product going to leave the factory and the label recorded before leaving the factory is ensured more effectively; in addition, an identifying code is arranged, and the identifying code is associated with production information of the product going to leave the factory and the anti-counterfeiting image, so that consistency and the unilateral control performance of the information associated with the product going to leave the factory are ensured. The invention further provides a product anti-counterfeiting system for realizing the method, so that an effective and safe anti-counterfeiting technology is provided to a product producer.

The invention discloses an image compressed encryption method based on compressed sensing and a Chua's circuit. The method comprises the following steps of 1, generating a key related to plaintext according to an original image by using SHA-256; 2, performing iteration on initial values x02 and a02 to generate a chaos sequence t' and t'', and generating measurement matrixes FORMULA and FORMULA through performing iteration on t' and t''; 3, measuring sub-bands LH, HH and HL by different compression ratios; 4, quantizing to acquire an integer sequence z, and forming a matrix z'; 5, acquiring a diffusion matrix f'; 6, acquiring a matrix LL', and performing an XOR operation on the diffusion matrix f'; and 7, combining four sub-bands such as LL, LH, HL and HH, and scrambling the chaos sequencegenerated by x04 and a04 to acquire a final compressed encryption image E. According to the method the data transmission quantity can be reduced, the robustness of the image can also be enhanced, thesecurity is high, and particularly, the method is good in performance when being used for resisting shearing attacks and noise attacks.

The invention discloses a simulation test method and device of an automatic driving system and a storage medium, and is applied to the field of automatic driving. The method comprises the steps of obtaining a target test scene in the automatic driving system; adjusting the first control algorithm based on a preset decision to obtain a second control algorithm; further, performing at least two simulation tests in the target test scene based on a second control algorithm to obtain first test data and second test data; and comparing the first test data with the second test data to obtain a test result for indicating the consistency of the automatic driving system. Therefore, the stability consistency test process is realized, the variable parameters in the control algorithm are constrained, the interference of the control algorithm on the automatic driving system test is removed, and the accuracy of the test result is improved.

The invention provides a vending machine with LCD and network management, relating to a vending machine equipped with industrial PC, multimedia player, liquid crystal screen, wireless communication module and other parts, and implementing selling goods, playing advertisements and real-time monitoring and management. And the vending machine adopts industrial PC, multimedia with external memory, and one or more advertisement information LCD screens and vending conversation LCD screens, and introduces wireless communication module and other parts. And its connecting mode is that the multimedia player is connected through network interface with master control machine, the master control machine is separately connected through interface with vending conversation screen, input device, goods select/cipher keyboard, delivery controller and wireless communication module, and non-contact communication module communicates with wireless network and management server. And it has wireless network connection function so that multiple vending machines can interconnected through network and management server.

The invention discloses a design method of a patrol robot full-coverage traversal path planning algorithm. The method includes the following steps that: a one-dimensional Chebychev mapping is selectedas a chaotic dynamic equation, and inverse sine transformation is utilized to improve the chaotic characteristic and uniform characteristic of the chaotic dynamic equation; two inverse sine-improvedone-dimensional Chebychev mapping equations are adopted to construct a two-dimensional chaotic path planner; the patrol area of a robot is decomposed into traversable sub-regions and obstacle regions;transition sub-regions re established, and a transition algorithm is designed; the traversable sub-regions in the patrol area are connected to form a traversal sequence diagram; the patrol robot full-coverage traversal path planning algorithm is designed according to the traversal sequence diagram and the transition algorithm, and the patrol robot full-coverage traversal path planning algorithm can be used for completing a patrol task. The algorithm of the invention has the advantages of simplicity, low repetition rate and high coverage rate, and can ensure the randomness and unpredictabilityof the patrol task while ensuring full coverage of the patrol area.

The invention provides a raster Moire striped fine dividing method and apparatus, and belongs to the field of raster displacement measuring. A conventional raster sensor has the advantages of large measuring range, high environment adaptation capability, low cost and the like, and is widely applied to the industries of precision displacement measuring, digital display and numerical control, large-stroke precision positioning, precision processing, microelectronics and the like. At present, higher requirements for a wide-range nanometer level and the like of raster displacement measuring is brought forward in the various industries. When a raster sensor operates, output waveform of the raster sensor is quite complicated. The raster sensor does not necessarily move uniformly during a measuring process, and especially in a starting, stopping and inverting process, signals are random. According to the randomness of the raster signals, a wavelet fine dividing method is brought forward, high-speed high-precision synchronization data acquisition is performed on four paths of More striped signals outputted by a raster, after equal-magnitude amplification and nonopiate correction pretreatment is performed on the raster signals, wavelet phase modulation and phase extraction treatment is carried out, and finally the signals are converted to displacement.