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744results about How to "Strong computing power" patented technology
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Methods and systems for using external display devices with a mobile computing device
InactiveUS20100138780A1Sacrificing of capabilitySacrificing qualityDigital computer detailsCathode-ray tube indicatorsDisplay deviceHuman–computer interaction
The present disclosure relates to methods and systems for using external display devices with a mobile computing device. When an external display device is connected or attached to a mobile computing device, output data associated with a resource executing on the mobile computing device may be displayed on the external display device. The output data may include a user interface appropriate for the display of the external display device. Execution of the resource may be transferred from the mobile computing device to the external display device.
Owner:CITRIX SYST INC
Methods and Systems for Using External Display Devices With a Mobile Computing Device
ActiveUS20100299436A1Sacrificing of capabilitySacrificing quality of displayDevices with multiple display unitsDigital data processing detailsData displayDisplay device
The present disclosure relates to methods and systems for using external display devices with a mobile computing device. The mobile computing device may be repurposed to display a virtual input device for interacting with a resource with output data being displayed on an external display device.
Owner:CITRIX SYST INC
Cross-platform development for devices with heterogeneous capabilities
ActiveUS7240327B2Good serviceFunction increaseMultiple digital computer combinationsSpecific program execution arrangementsSoftware engineeringOutput device
A system for generating software applications for a plurality of heterogeneous computing devices. Each computing device has different capabilities. The system outputs device-specific versions of a software application each tailored to the capabilities of the associated computing device in response to receiving device-independent modeling information characterizing the software application. The system includes a framework, a plurality of object types, a modeling tool, and a plurality of device-specific code generators. The framework defines common services on the computing devices. Each object type has a functional relationship to the common services provided by the framework. The modeling tool defines instances of the plurality of object types based on modeling information received as input, outputting a metadata structure describing the behavior and functionality of a software application. From the metadata, the code generators generate device-specific application code tailored to the capabilities of the associated devices.
Owner:SAP AG
Avionics system suitable for multi-purpose unmanned aircraft
InactiveCN101913427AMeet the needs of useReliable data transmissionAircraft navigation controlProgramme total factory controlAviationMass storage
The invention discloses an avionics system suitable for a multi-purpose unmanned aircraft. A 1553B dual-redundancy bus framework is adopted in the avionics system. The avionics system consists of a main processor unit, a universal interface unit, a 1553B bus, a mass memory, an airborne monitoring terminal, a task load, an execution mechanism and a sensor assembly. The devices have the connection relationships that: the main processor unit, the universal interface unit, the mass memory, the airborne monitoring terminal and the task load are connected with the 1553B bus through a 1553B special electric connector, and the 1553B special electric connector serving as a bus module connects all the devices attached to the bus together; a steering engine controller is connected with the universalinterface unit through an RS422 interface; and the sensor assembly is connected to the universal interface unit through interfaces of serial RS422 / RS232 / RS485, an ARINC429 bus, a CAN, analogue AD / DA and discrete DIO and the like. The avionics system has the characteristics of strong multi-task expandability, multi-redundancy high reliability, rich data interfaces and strong calculation and processing capabilities, and can well meet the application requirement of 'one platform and multiple purposes' of the unmanned aircraft.
Owner:BEIHANG UNIV
Method and apparatus for computing over a wide area network
InactiveUS7007070B1Strong computing powerMaintain performanceMultiple digital computer combinationsTransmissionNetwork addressingNetwork address
A cluster computer system including multiple network accessible computers that are each coupled to a network. The network accessible computers implement host computer programs which permits the network accessible computers to operate as host computers for client computers also connected to the network, such that input devices of the client computers can be used to generate inputs to the host computers, and such that image information generated by the host computers can be viewed by the client computers. The system also includes a cluster administration computer coupled to the multiple network accessible computers to monitor the operation of the network accessible computers. A method for providing access to host computers by client computers over a computer network includes receiving a request for a host computer coupled to a computer network from a client computer coupled to the computer network, wherein the relationship of the host computer to the client computer is to be such that after the client computer becomes associated with a host computer, an input device of the client computer can be used to generate inputs to the host computer, and such that image information generated by the host computer can be viewed by the client computer. Next, a suitable host computer for the client computer is determined, and the client computer is informed of the network address of the suitable host computer.
Owner:GULA CONSULTING LLC
Searchable encryption method based on Chinese in cloud environment
ActiveCN105681280ASearchable implementationSearchable encryption implementationTransmissionSpecial data processing applicationsDocument preparationSearch function
The invention discloses a searchable encryption method based on Chinese in a cloud environment. A dynamic searchable encryption scheme is finished based on the features of a PEKS scheme and a Bloom filter; a ciphertext search function is finished in an insecure channel; fuzzy keyword search based on a public key searchable encryption scheme is supported; multi-keyword search of the Chinese is supported; the keywords in a document are dynamically added or deleted; according to the method provided by the invention, an inner product operation is carried out through constructing a search vector and a file vector so as to finish a fuzzy search matching function; the similarity weight of the keywords in the document and the keywords of a search trap door is calculated through importing the vectors; the ciphertext search function and the fuzzy keyword search function are realized; the ciphertext keywords can be securely transmitted on a public channel in adoption of a server and user double-key pair mode; in application of a hash function and a pseudo-random function, through the scheme, the keyword selection attack can be resisted effectively; and the ciphertext is searched under a condition that the cloud server is semi-trusted.
Owner:XIDIAN UNIV
Vector crossing multithread processing method and vector crossing multithread microprocessor
InactiveCN102156637AImprove peak performanceGive full play to computing powerMultiprogramming arrangementsConcurrent instruction executionHardware structureThread scheduling
The invention discloses a vector crossing multithread processing method and a vector crossing multithread microprocessor. The processing method comprises the following steps: using a multithread instruction-acquiring part to choose a vector thread from N vector threads for reading an instruction and storing the read instruction to a corresponding instruction buffer array of the vector thread; using a thread scheduling part to choose an instruction buffer array from N instruction buffer arrays and taking out an instruction from the instruction buffer array for the purpose of decoding; and sending a decoded instruction to a vector executing streamline or scalar executing streamline so as to execute. The method can be realized by using hardware structure by the vector crossing multithread microprocessor. The method and the microprocessor provided by the invention have the advantages that the vector processing technique and multithread technique are combined, the hardware structure is simple, the operation capability is strong, the compatibility and expansibility are excellent, and the like.
Owner:NAT UNIV OF DEFENSE TECH
Method and apparatus for computing within a wide area network
InactiveUS7013327B1Strong computing powerMaintain performanceMultiple digital computer combinationsTransmissionNetwork addressingNetwork address
Owner:AI-CORE TECH LLC +1
Customizable individualized response method and system used in mobile terminal
InactiveCN103078995AUnderstand the intentionEasy to use and flexibleSubstation equipmentSpeech recognitionPersonalizationResponse method
The invention discloses a customizable individualized response method and system used in a mobile terminal. A user sets an answer rule and individualized answer content at first, and then judges whether to start an automatic answer flow or not according to the answer rule after receiving a call. A speech recognition function is used to identify telephone speech content. A semantic analysis function is used to analyze the intention of a caller so as to further determine the individualized automatic answer content. A speech synthesis function of the mobile terminal is used to play speech to the caller. The speech identification can be completed based on either local resources of the mobile terminal or a cloud-side recognition function. The semantic analysis function can be realized in the mobile terminal or in a manner of accessing the cloud-side semantic analysis function.
Owner:AISPEECH CO LTD
Method for cross-isomerism domain identity authentication and session key negotiation based on access authorization ticket
ActiveCN103780618AHigh security requirementsStrong computing powerUser identity/authority verificationPublic key authenticationKey-agreement protocol
The invention provides a method for cross-isomerism domain identity authentication and session key negotiation based on an access authorization ticket. The method mainly comprises the steps that firstly, a first-level trust relationship is established between a CA of a PKI domain and an AS of a Kerberos domain through a distributed trust model based on a public key authentication mechanism; on the basis, the authorization ticket allowing an outer-domain user to have access to resources of the domain is generated and distributed by the CA or the AS united with a TGS, and through design of a two-way cross-domain authentication and key negotiation protocol based on a symmetric key cryptosystem, a second-level trust relationship allowing the outer-domain user to have access to the resources of the domain is established. On the premise that the requirements for safety of the levels are satisfied, the calculated amount and the communication traffic of a terminal are effectively reduced, public key encryption and decryption operations of a Kerberos domain terminal can be completely avoided, and the implementation is good in the cross-isomerism domain identity authentication process of a dynamic distributed type system, session key negotiation is completed when identity authentication is conducted, and the protocol efficiency is high.
Owner:四川华创智能科技有限公司
Method and system for detecting and intercepting malicious code of mobile terminal
InactiveCN102254113AStrong computing powerDoes not occupy and consume system resourcesPlatform integrity maintainanceTransmissionThird partyComputer terminal
The invention discloses a method for detecting and intercepting a malicious code of a mobile terminal. The method comprises the following steps of: intercepting creating process of an Android debug bridge (ADB) client in a computer, and acquiring and saving a parameter list when the ADB client is started; judging whether an APK file (Android application program) is required to be installed according to the parameter list, if so, acquiring the route of the APK file to be installed in the computer; detecting whether the APK file to be installed corresponding to the route is the malicious code; and selecting stopping installing or continuously installing according to the detection result. The invention further discloses a system for detecting and intercepting a malicious code of a mobile terminal. The method and the system do not consume system resources of the mobile phone; the method and the system are suitable for the existing various installation methods and the third party mobile phone aided software; and the method and the system can effectively prevent the malicious code from spreading to the intelligent mobile phone through the computer.
Owner:SHENZHEN ANZHITIAN INFORMATION TECH
Access control of media services over an open network
InactiveUS20090019468A1More bandwidthStrong computing powerMultimedia data retrievalAnalogue secracy/subscription systemsConditional access systemsMaster key
To ensure that media services are only provided to those authorized users or receiving devices, various conditional access mechanisms are provided to secure that media services are only received in those authorized. Different from a prior art conditional access system, an entitlement control message containing a master key can be sent directly to an ordering box. Depending on implementation, a secure session may be established between a server and an ordering box, such that all secured information including a master key may be transported. Further an ordering box does not need to possess a key or keys needed to decrypt an entitlement control message, such key(s) may be transported from time to time in a secure session established between the server and the ordering box.
Owner:VUDU
Method and apparatus for controlling a computer over a TCP/IP protocol network
InactiveUS7130888B1Strong computing powerMaintain performanceMultiple digital computer combinationsTransmissionWeb siteNetwork control
The present invention permits virtually the entire functionality of a computer system to be made accessible over a network such as the Internet or an Intranet. More particularly, the present invention permits a computer system to be run as a "virtual machine" through a web page provided at a web site on the World Wide Web (WWW). The apparatus of the present invention includes a plurality of computers arranged in a wide area network (WAN) such as the Internet or an Intranet. At least one of the computers has at least one unique address designating a web site. A host computer system (which may or may not be one of the computers on the Internet) can be "posted" onto an "advertising" web page at the web site to permit other computers coupled to the Internet to interact directly with the host computer system. The computer "posted" on the web page is referred to as the "host" or "advertiser" computer, and computers accessing the host computer are referred to as "client" or "user" computers. Having the host computer posted on a web page creates a "virtual computer" that can be view and / or controlled by the client computers. Once the connection has been made between the host computer and one or more client computers, the web page is bypassed, i.e. the two or more computer systems communicate through the Internet without necessarily going through the web site supporting the "advertising" web page.
Owner:GULA CONSULTING LLC
Loss-preventing system with locating and tracking functions
InactiveCN104464132AStrong computing powerReduce use costBurglar alarmData informationPersonal computer
The invention provides a loss-preventing system with the locating and tracking functions. The loss-preventing system comprises a target locating device and a tracking device. The target locating device is arranged on a locating and tracking object and comprises a general control module, a wireless communication module, a locating module, a reminding module and a display module. The general control module comprises a CPU, a memory and a software processing system and can control other modules and analyze and process related data information. Software and hardware of the tracking device are the same as the target locating device basically, only the use purposes are different, and the main distinction lies in that when direct communication with the target locating device is carried out, the corresponding wireless communication module is adopted, and when indirect communication is carried out, any communication module capable of communicating is adopted. Two locating modes are adopted, one mode is that locating is carried out by analyzing the strength of wireless communication signals received by the wireless communication module, and the other mode is that locating is carried out according to locating data obtained by the locating module like a GPS. The loss-preventing system is an intelligent loss-preventing system, is wide in application range, and can be modified on the basis of a mobile phone, a tablet personal computer and the like.
Owner:NINGBO FREE TRADE ZONE PANDONG INFORMATION TECH
Multiprocessor real-time simulation platform
InactiveCN101320524AStrong computing powerAchieve sharingCosmonautic condition simulationsSoftware simulation/interpretation/emulationReal-time simulationSpace environment
The present invention relates to a multi-processor satellite real-time simulation platform which consists of three or more than three ARM processors, and two or more than two DSP processors with an FPGA as an intermediate memory. The ARM1 is used as the computer of the simulation satellite control center; the ARM2 is used in the space environment of the simulation satellite; the ARM3 is used for the kinetic calculation of the satellite; the DSP1 is used for completing the calculation of a sensor model; the DSP2 is used for completing the calculation of an actuating mechanism; the ARM1 sends data to the DSP1 so as to acquire instructions; the DSP1 sends the acquired data instructions to the ARM2 and the ARM3, fetches relevant data from the FPGA, and transmits the data to the ARM1; the ARM1 completes the calculation according to the read data, and acquires the corresponding attitude orbital parameters; if the parameters satisfy the requirements, the satellite enters the normal mode; if the parameters do not satisfy the requirements, the ARM1 sends control instructions to the DSP2 so as to control the actuating mechanism; the DSP2 transmits the corresponding data to the ARM2 and the ARM3 through the FPGA after completing the calculation, until the attitude orbit can satisfy the corresponding requirements. The platform simplifies the complexity of the system, lowers the difficulty of the simulation, and improves the real-time performance of the simulation.
Owner:BEIHANG UNIV
Vehicle environment sensing system and method based on unmanned plane
ActiveCN105512628AEasy to controlRelative position information is clear and unambiguousDetection of traffic movementCharacter and pattern recognitionUncrewed vehicleRoad surface
The invention relates to a vehicle environment sensing system and method based on an unmanned plane, and the system and method are used for quickly acquiring the road environment information around a vehicle. The sensing system comprises the unmanned plane and an earth station, the unmanned plane id connected with the vehicle through a mooring rope, the road surface is shot by the unmanned plane, and a video image is transmitted to the earth station; the earth station is arranged in the target vehicle, the earth station can process the video image to obtain the vehicle environment information, and the earth station also can calculate the flight control parameter and send the parameter to the unmanned plane to make the unmanned plane and the vehicle move together. The sensing method is based on the sensing system, the unmanned plane takes off and hovers above the vehicle, the unmanned plane establishes a communication for sensing the environment and transmits the video image to the earth station, the earth station processes the video image, calculates the vehicle environment information and transmits the information to the vehicle, and the earth station calculates the flight control parameter and transmits the parameter to the unmanned plane. According to the invention, the system can perform the wide area observation in the direction vertical to the vehicle plane direction, the coverage is wide, the road environment information around the target vehicle can be easily sensed, and the distance between the objects in the image can be precisely calculated.
Owner:BEIHANG UNIV
Method and apparatus for controlling a computer over a wide area network
InactiveUS7100069B1Strong computing powerMaintain performanceError detection/correctionOffice automationClient-sideIntranet
The present invention permits virtually the entire functionality of a computer system to be made accessible over a network such as the Internet or an Intranet. More particularly, the present invention permits a computer system to be run as a “virtual machine” through a web page provided at a web site on the World Wide Web (WWW). The apparatus of the present invention includes a plurality of computers arranged in a wide area network (WAN) such as the Internet or an Intranet. At least one of the computers has at least one unique address designating a web site. A host computer system (which may or may not be one of the computers on the Internet) can be “posted” onto an “advertising” web page at the web site to permit other computers coupled to the Internet to interact directly with the host computer system. The computer “posted” on the web page is referred to as the “host” or “advertiser” computer, and computers accessing the host computer are referred to as “client” or “user” computers. Having the host computer posted on a web page creates a “virtual computer” that can be view and / or controlled by the client computers. Once the connection has been made between the host computer and one or more client computers, the web page is bypassed, i.e. the two or more computer systems communicate through the Internet without necessarily going through the web site supporting the “advertising” web page.
Owner:GULA CONSULTING LLC
Updating routing and traffic flow data and vehicle navigation device
InactiveUS20040117113A1Strong computing powerPromote resultsInstruments for road network navigationRoad vehicles traffic controlTraffic capacityData storing
The present invention relates to a method for updating route data stored in a vehicle navigation device, particularly an offboard vehicle navigation device, the route data being updated in response to the occurrence of at least one predetermined event. According to the present invention, the method includes the following step: Transmitting route query data to at least one center when at least one predetermined, traffic-flow-induced event occurs. The present invention also relates to a vehicle navigation device and a method for updating traffic-flow data.
Owner:ROBERT BOSCH GMBH
Establishment method for gateway device which provides edge computing service
ActiveCN108667924AReduce the burden onStrong computing powerNetwork connectionsWireless routerIot gateway
The invention discloses an establishment method for a gateway device which provides edge computing service and belongs to the technology of the Internet of things and the field of application. A wireless router module, a data analysis module and a device management module are established in common Raspberry Pi through combination of own features of a Home Assistant system according to the own features of the Raspberry Pi, the gateway device which provides the edge computing service is obtained, and a router function, a data analysis function and a device management function are realized. The wireless router module in the Raspberry Pi is used for realizing an Internet surfing function of an IOT device and can communicate with a cloud server center and other device terminals. The data analysis module is used for collecting data generated by the IOT device and analyzing and processing the data before the data reaches the cloud center. The device management module is used for carrying outcorresponding device control response for sensor data. According to the method, a narrow router is provided, a task of providing service for the edge computing is carried out, and a development demandof an Internet of things gateway device in the future can be satisfied.
Owner:DALIAN UNIV OF TECH
Vehicle fault online detection and early warning device based on internet of vehicles and vehicle fault online detection and early warning method thereof
InactiveCN106327344ARealize online real-time monitoringAvoid failureData processing applicationsThe InternetComputer terminal
The invention provides a vehicle fault online detection and early warning device based on the internet of vehicles and a vehicle fault online detection and early warning method thereof. The device comprises a vehicle-mounted terminal, a remote server side, a vehicle owner mobile phone client side, a maintainer client side and a maintenance manufacturer client side. According to the detection method, the vehicle-mounted terminal acquires vehicle information, wherein the vehicle information includes the data of an OBD interface and the data acquired by a sensor so as to realize vehicle online real-time monitoring; the vehicle information is transmitted to the remote server side to perform big data intelligent analysis so that the existing problems of the vehicle are obtained and early warning is provided and faults can be avoided; besides, a vehicle maintenance scheme can be intelligently provided, and the data are fed back to the vehicle owner and the maintenance shop of the maintainer through the vehicle owner mobile phone client side, the maintainer client side and the maintenance manufacturer client side so that the vehicle owner can understand the situation of the vehicle in real time and take measures for fault prevention, the maintainer can view the data and the analysis result of the remote server side and thus maintenance is facilitated.
Owner:SOUTH CHINA UNIV OF TECH
High-accuracy position correction positioning system based on cloud computing
The invention discloses a high-accuracy position correction positioning system based on cloud computing. The high-accuracy position correction positioning system comprises a client-terminal, a differential server and a differential reference station network formed by multiple differential reference base stations. The differential server is connected with the client-terminal and the differential reference station network via a communication module. The differential server receives single-point positioning information of the client-terminal and real-time pseudo range observation information of the reference base stations. When the client-terminal is insufficient in single-point positioning accuracy and requests to the differential server for high-accuracy positioning, the differential server solves positioning information correction number and a correction satellite set formed by multiple satellites on the basis of the received single-point positioning information and the real-time pseudo range observation information. The client-terminal solves accurate positioning information to perform accurate positioning by utilizing the correction satellite set and the positioning information correction number. According to the correction positioning system, an accurate positioning service can be intelligently, rapidly and accurately provided to the client-terminal so that positioning is rapid and positioning accuracy is high; and the client-terminal acts as a data provider so that the client-terminal is low in computation burden and low in flow consumption.
Owner:深圳北斗应用技术研究院有限公司
Wireless automatic parking system and method
ActiveCN106875736AStrong computing powerProcessing speedIndication of parksing free spacesAnti-collision systemsControl systemRadar
The invention provides a wireless automatic parking system and method. The wireless automatic parking system comprises an environment sensing system installed in a parking lot, a base station and a vehicle control system installed inside the vehicle. A camera is used for replacing an ultrasonic radar and a laser radar. Environmental sensing, path planning, and vehicle controlling of the parking system are submitted to the environment sensing system of the parking lot; the environment sensing system having high computing power is capable of processing information quickly; and thus the complicated algorithms can be used on the premise that the real-time performance is guaranteed, so that global and precise monitoring of a parking process can be realized. The vehicle controller only needs to process a few of data and the software and the hardware are simplified, so that the cost can be lowered.
Owner:JIANGSU UNIV
Tunnel orthographic image acquisition system based on laser radar LIDAR point cloud data and tunnel orthographic image acquisition method thereof
ActiveCN106127771AImprove detection efficiencyTrue to sizeImage enhancementImage analysisPoint cloudRadar
The invention discloses a tunnel orthographic image acquisition system based on laser radar LIDAR point cloud data. The tunnel laser radar point cloud data of any shape design of section contour are unfolded into a measurable laser radar tunnel orthographic image map by using a skeleton line mileage projection method and a section contour projection method, and the image map acts as a reference base map and a target quantity color numerical analysis map is superposed on the image map in a semitransparent mode. The invention also provides a corresponding method. The generated laser radar tunnel orthographic image can truly reflect the measurable image of the size and the position of the internal wall of the tunnel and can generate a tunnel orthographic image map plane user report including "4D" information to visually display the three-dimensional section deformation and flatness of each part of the internal wall of the tunnel to tunnel structure detection users. The length, the width and the area of cracks, water seepage and other tunnel defects can be actually measured so that the geometric size of the defects can be calculated. The scientific basis is provided to assessment and restoration of the tunnel defects and the production efficiency of tunnel detection is greatly enhanced.
Owner:南京数联空间测绘科技有限公司
Blockchain gateway facing application of Internet of Things and method for managing Internet of Things using the gateway
InactiveCN109510760AEfficient Access CapabilityStrong computing powerNetwork connectionsThe InternetFinancial transaction
The invention belongs to the technical field of computers, in particular to a blockchain gateway facing application of Internet of Things and a method for managing Internet of Things using the gateway. The method is characterized in providing blockchain accessing capability for a device of Internet of Things. The gateway comprises a local area network interaction module, an internet interaction module, a gateway management module and a blockchain functional module. The local area network interaction module is used for realizing communication between the blockchain gateway and the device of Internet of Things located in the same local area network. The internet interaction module enables the blockchain gateway to access the Internet and communicate with remote hosts, servers, other blockchain gateways or other communicable devices through the Internet to realize a direct communication or a P2P communication, so as to complete a data interaction. The gateway management module is used forrealizing functions of fault reporting, remote diagnosis and recovery, and online software upgrading of the blockchain gateway. The blockchain functional module is used for realizing functions of theblockchain gateway as a blockchain node, wherein the functions comprise that initiating credibility verification, transaction initiating, transaction check executing, transaction verification and transaction packaging of the device of Internet of Things on the blockchain.
Owner:深圳物缘科技有限公司
Battery management system and balance method with parallel balance function
ActiveCN107359662APassive Equilibrium RealizationReduce sizeCharge equalisation circuitElectric powerMOSFETControl engineering
The invention discloses a battery management system and balance method with a parallel balance function. The battery management system comprises a battery pack with 24 lithium ion batteries, six single chip microcomputer-based battery monitoring modules, a main controller, six single battery gating modules, an active balance module, a communication module, a charge-discharge protection apparatus and a battery module. By virtue of the battery management system, monitoring and control for 24 batteries can be realized, and functions of monitoring the working parameters of the single batteries, and performing passive balance, active balance, parallel balance, charge-discharge overcurrent protection and upper computer communication and the like of the battery pack can be realized; meanwhile, the size of a balanced current also can be regulated, and intelligent balance can be realized; by virtue of the system, a switch matrix driver and a common power supply switch controller can be omitted; the driving of an MOSFET transistor of each single battery gating module is completed by the battery monitoring module; and the driving of an MOSFET transistor of the active balance module is completed by the main controller, so that the intelligent charge-discharge function of the balanced current controlled by software is realized.
Owner:SOUTH CHINA UNIV OF TECH
Access control system and method supporting cross-domain data sharing and wireless communication system
ActiveCN110636500AGuaranteed safe transmissionImprove securityPublic key for secure communicationSecurity arrangementKey sizeCommunications system
The invention belongs to the technical field of wireless communication networks, and discloses an access control system and method supporting cross-domain data sharing, and a wireless communication system. Users needing to share data in a domain A select elliptic curve parameters to generate ECC key pairs; a global authentication center CA of the domain B generates a global public parameter; the proxy node in the domain B encrypts the system public key and the attribute set by using the ECC public key of the domain A user; the domain A user decrypts the data from the domain B by using the ECCprivate key of the domain A user and uploads the data to the public cloud; the legal user sends a file access request to the public cloud; and when user revocation occurs, the proxy server searches acorresponding attribute private key list according to the global identifier of the user and deletes the attribute private key list. The method is high in safety under the condition of the same secretkey length. The method gives full play to the characteristic of strong computing power of agent nodes, completes the preprocessing of some data, helps a user to carry out partial decryption, and improves the decryption efficiency of the user.
Owner:XIDIAN UNIV
Portable vibration data collector and method based on embedded technology
InactiveCN101221422AStrong computing powerFriendly data analysis functionComputer controlSimulator controlCapacitanceMicrocontroller
The invention relates to the data acquisition and equipment fault diagnosis field, in particular to a portable vibration data acquisition device and a method based on embedded technology. The device comprises an acceleration transducer, an acceleration transducer interface module, a capacitance isolation module, a programmed control amplifying module, a self-adapting antialiasing filter, an AD converter and the bus interface of the converter which are connected in turn; moreover, the device also comprises an ARM minimum system, a DIM144 interface module, a singlechip as well as an electronic label module, a keyboard, a power source management and voltage conversion module which are connected with the singlechip; in addition, the programmed control amplifying module and the self-adapting antialiasing filter are also connected with a singlechip 8. The device communicates with an upper computer through a serial port to assign point inspection task, and transmits the sampling frequency in the point inspection task to the singlechip; moreover, the singlechip sets the lowpass cut-off frequency of the antialiasing filter according to the sampling frequency. With low power consumption, convenient operation and powerful data analysis function, the device has the characteristics of real time and accuracy.
Owner:BEIJING UNIV OF TECH
Multiple audio streams
ActiveUS20110023072A1More bandwidthStrong computing powerTwo-way working systemsTransmissionClosed captioningVideo encoding
Owner:NBCUNIVERSAL
Double-DSP (digital signal processor) control system based on chained SVG (scalable vector graphics)
ActiveCN103311932AImprove reliabilityFlexible configurationFlexible AC transmissionReactive power adjustment/elimination/compensationInternal memoryDigital signal processing
The invention discloses a double-DSP (digital signal processor) control system based on a chained SVG (scalable vector graphics). The double-DSP control system comprises a double DSP and an FPGA (field programmable gate array), wherein the double DSP is used for carrying out functional division according to a primary DSP and an auxiliary DSP, reading voltage and current information from the DSP, executing a core algorithm, calculating modulation wave information and providing the modulation wave information to the FPGA, wherein the FPGA is used for carrying out analog quantity sampling, so as to generate PWM (pulse-width modulation) pulse signals; and coding the PWM signals, transforming the coded PWM signals into optical signals to be transmitted into a corresponding power module, wherein the primary DSP is used for acquiring the state of the power module and the state of an external switch, and carrying out logic control and command transmission on the states. With the adoption of the double DSP control system based on the chained SVG, the double DSP+FPGA is adopted as a hardware core of a control platform; reasonable control software design is carried out by aiming at control requirements of the chained SVG on such basis; corresponding functional modules are designed according to the advantages of different CPUs (central processing units); data exchange and processing are carried out on the functional modules through an internal memories, buses and the like; the whole control system is compact in structure, rapid and effective in running.
Owner:南京国电南自新能源科技有限公司
A Lightweight Fast Response Aeronautical Remote Sensing Inertial Stabilization Platform Control System
ActiveCN102297694AVarious working modesHigh working reliabilityNavigation by speed/acceleration measurementsAviationControl system
The invention discloses a lightweight quick response aerial remote sensing inertial-stabilized platform controlling system used for carrying out initiative controlling upon triaxial frames of stabilized platforms. The system comprises a DSP module, an FPGA module, a PWM power driving module, brushless DC torque motors, a stabilized platform frame, a measuring sensor, and an interface circuit. Angular position information, angular rate information and attitude information of the frame output by the measuring sensor are acquired by the DSP module and the FPGA module through the interface circuit in real time. PID controlling algorithm is executed by the DSP module and the FPGA module, and 18 PWM signals for controlling the three brushless DC torque motors are generated. The signals are converted into voltage signals by the PWM power driving module, and the brushless DC torque motors are driven, and the frame is driven to rotate, such that the initiative controlling upon the triaxial frame is realized. According to the invention, an independent mode and a combined mode are realized, and a frame soft lock function and an independent course configuration function under the combined mode are realized. Therefore, the operation of the platform is more reliable and intelligent.
Owner:BEIHANG UNIV
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