40results about How to "Strong parallel computing ability" patented technology

The invention discloses a small FMCW-based (frequency modulated continuous wave) SAR (synthetic aperture radar) imaging system by using an FPGA (field programmable gate array) to mainly overcome the disadvantages of large volume, heavy weight and high power consumption of the traditional SAR imaging system. The small FMCW-based SAR imaging system comprises a radar front end, an acquisition preprocessing unit, a signal processing unit and a receiving host, wherein the acquisition preprocessing unit comprises an instruction communication module, an A / D (analogue / digital) acquisition module, an FPGA control and calculation module and a data sending interface; the signal processing unit comprises a data receiving interface, an FPGA control module, a DSP (digital signal processor) calculation module and a data sending interface; the acquisition preprocessing unit and the FPGA of the signal processing unit are used for receiving back waves and inertial navigation parameters of the radar front end, feeding back the regulation instruction to the radar front end to perform distance pulse pressure, transmitting data to a DSP, receiving the calculation results of the DSP and transmitting thecalculation results of the DSP to the receiving host for display. According to the small FMCW-based SAR imaging system, one picture can be imaged in real time in one second under the airborne condition, the small FMCW-based SAR imaging system has the advantages of small size, light weight, small power consumption and good reliability and can be applied to the fields of radars, guided missile, remote sensing, etc.

The invention provides a secondary sound source laying method for a helicopter cabin active noise control system. The secondary sound source laying method for a helicopter cabin active noise control system is characterized in that: based on a quantum particle swarm optimization algorithm, encoding the position of a secondary sound source, taking one encoding string as a particle, performing iterative computation, and computing the fitness value of each particle during each iteration process, and performing element value updating on the particles. The secondary sound source laying method for a helicopter cabin active noise control system has memory so that each particle can still maintain the individual historical extremum of each particle when the algorithm is ended, and taking regard of the situation that the secondary sound source in a helicopter cabin has constraint, various meaningful selection schemes can be provided. Besides, the secondary sound source laying method can search the secondary sound source position in a plurality of secondary sound source working faces, and can select better laying of secondary sound source in the helicopter cabin; and the secondary sound source laying method can take regard of a plurality of frequencies at the same time, laying of secondary sound source robustness at a plurality of harmonic frequencies, that is, good noise reduction effect can be obtained when the secondary sound source is laid at the frequencies.

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.

The invention relates to a light terminal 3D cloud rendering method. The 3D program is deployed in the cloud server cluster according to preset rules. When a user terminal initiates a request, the cloud server cluster receives and distributes the request, and the 3D program can perform rendering operations on the cloud server cluster. , and send the rendering result back to the user terminal, and the user terminal judges the rendering result and performs corresponding processing. The present invention applies cloud server clusters, based on the extremely high hardware configuration and massive computing resources of the cloud rendering server, provides flexible elastic computing capabilities and super parallel computing capabilities, can quickly process graphics and instructions, and render multiple 3D programs in parallel. While reducing user costs, all terminal devices can obtain high-performance host-level HD image quality and extremely smooth experience without downloading; cloud rendering servers can perform load balancing and build clusters to process more complex large-scale 3D programs, without worrying about a certain server It is safer and more reliable to solve the problem of failure to work.

The invention provides a depth map generation device, including an input module used for setting video synchronization signals, user variable input parameters and multi-channel image data, a gray scale conversion module used for calculating gray scale data of each pixel; a minimum depth path acquisition module used for generating a minimum depth path according to the gray scale data, a depth refinement module used for acquiring refined depth data and smooth depth data according to the minimum depth path, a user variable setting module used for carrying out updating calculation on the smooth depth data according to user variable input parameters to generate final depth data; a synchronization signal processing module used for performing output synchronization processing on the video synchronization signals, and an output module used for setting output parameters, wherein the output parameters include final depth data of each pixel and the updated video synchronization signals. The device according to the embodiment of the invention has the advantages of fast calculation speed and ability of direct real time conversion.

The invention relates to a stream cipher based secure communication protocol. The communication is one-time pad, keys are owned by both parties and are synchronous, the generation speed is fast, the fault-tolerant capacity is achieved, a 128-bit original text is processed every time, digital signature and data encryption are performed on the original text, and subsequently, 256-bit processed data are sent; firstly, original text grouping and hashed value calculation are performed, secondly, the data are encrypted, and finally, data decryption is achieved. According to the stream cipher based secure communication protocol, a method is designed on the basis of a stream cipher system, a grouping encryption processing structure is used for reference, the 256-bit data can be processed every time, high encryption and decryption efficiency is achieved, a random number generator is used for generating the keys which are owned by both communication parties and are synchronous, and the occupation space of the keys is small.

The invention relates to a high-performance BW100 chip based SAR (Synthetic Aperture Radar) parallel processing method. The method comprises the following steps: an echo datum is transmitted by an FPGA (Field Programmable Gate Array) controller in a ping-pong manner and then is processed by a master BW100 chip and a slave BW100 chip, the processing result is transferred to a DDR3 (double data rate) memory through a ping-pong QDRII (quad data rate) memory to finish processing the echo number and the distance vector; the ping-pong QDRII memory takes the direction vector data from the DDR3 memory, transmits the data in a ping-pong manner to the master BW100 chip and the slave BW100 chip through the FPGA controller to process the data, and receives the processing result in a ping-pong manner, so as to finishing processing an imaging direction vector; after the distance vector and the direction vector are processed for multiple times, the whole imaging processing is completed. The invention further discloses a high-performance BW100 chip based SAR parallel processing device. The BW100 chip is taken as an SAR imaging processing core processor, and the device has the advantages of strong parallel processing capability and data communication capability and excellent overall performances, and is suitable for the SAR real-time imaging processing field.

The invention provides an image encryption method based on the Hash function and an inserting-deleting model and relates to the field of image encryption. The Hash function and an inserting-deleting model of DNA computing are introduced to an image encryption processing. First, operating pixel values by use of the Hash function to obtain a Hash table; scrambling the pixel values according to the Hash table and then performing DNA coding to a scrambled matrix; in addition, the method makes full use of the advantages of the inserting-deleting model; the inserting-deleting model is applied in spreading the pixel values of the image. Simulation results and security analysis show that the method not only has large cipher code space and high sensitivity, but also can resist exhaustive attacks, statistical attacks, and differential attacks, etc., and has good encryption effect. The method is stressed on applying the Hash function and the inserting-deleting model in image encryption.