469results about How to "Quick capture" patented technology

A device that is useful for removing obstructions from vessels. Various embodiments and methods of use are contemplated for the effective removal of obstructions. The disclosed devices utilize a thrombogenic material to promote the formation of fibrin bonds, thus enhancing adhesion. It is further contemplated that the disclosed devices may be used in all vasculature including the cerebral vasculature and the neurovasculature.

A focus detection device includes an image sensor and a plurality of lenslets. Each of the plurality of lenslets has a distinct conjugate length and is associated with a distinct portion of the image sensor.

The present invention relates generally to the field of high content screening of particles, e.g., cells in a flow cytometric system. In particular, the present invention relates to devices, methods and systems to obtain line-scan images of particles, e.g., cells, of a plurality of different samples simultaneously, where the line-scan images can be used to identify cells based on at least one of a variety of phenotypic characteristics such as shape, asymmetry, and intracellular information for cell sorting and selection. In some embodiments, the line-scan images are obtained as the particles, e.g., cells, in a plurality of different samples flow through a plurality of microchannels, reducing the need and time for focusing of the image detection system. In some embodiments, the laser spot size has a small spatial resolution for rapid capturing of images of cells. In some embodiments, the laser spot size has a larger spatial resolution for imaging of larger particles or cells, e.g., rare cells in a sample. In some embodiments, the devices, methods and systems are automated for a high-throughput, high content screening of particles such as cells in a plurality of samples.

A system and method for stereoscopic image capture. The method includes capturing a first image with a first camera and capturing a second image with a second camera. The second camera comprises a lower resolution sensor than a sensor of the first camera. The method further includes determining a third image based on adjusting the first image to a resolution of the lower resolution sensor of the second camera and generating a stereoscopic image comprising the second image and the third image.

A method and system for biometric identification utilizes structured light (e.g., fine grid) that is projected to the target objects (fingers and palm). The image with structured light on the object contours can give 3D information of the objects with resolution to satisfy NIST fingerprint standard. In embodiments, the structured light can be of different color, to reduce the burden of the software processing. To enhance the capture speed, a model with 2D image on “smooth” 3D surface can be used. In this “2.5-D” case, the finest feature of the structured light can be as big as millimeter size. Although grid-structured light can satisfy current requirement of fingerprint and palm print capture standards, in other embodiments, a customized structure based on the initial scan result can give optimal result on the 3D data. This may be useful when higher resolution is desired.

The present invention discloses a low signal-to-noise ratio short preamble burst signal demodulation system and method. A burst signal detection module detects in real time whether a received signal includes an MPSK signal, if the received signal includes the MPSK signal, an initial position and an ending position of the MPSK signal are offered; then, a coarse frequency synchronization and time synchronization module realizes time synchronization point tracing and coarse frequency offset correction of the signal according to the preamble of the burst signal and the initial position of the MPSK signal; then, sampling timing synchronization and fine frequency offset compensation and phase offset correction are respectively performed by a timing synchronization module and a fine frequency synchronization module on the signal; and finally, a phase unwrapping and de-mapping module completes phase unwrapping and bit decoding. According to the method, time synchronization of the demodulation system is before timing sampling synchronization, a parameter estimation module is reused, while the processing time is not increased, the accuracy of coarse frequency estimation and time synchronization is greatly improved, and hardware resource consumption is reduced greatly.

The invention provides a double-antenna GNSS (Global Navigation Satellite System) / INS (Inertial Navigation System) deeply integrated navigation method and device. The device comprises a power supply module, an MEMS (Micro Electro Mechanical System) inertial measurement unit, a radio frequency module, an FPGA (Field Programmable Gate Array) module, a DSP (Digital Signal Processor) module and at least two antennas. According to the device, with the assistance of an INS, the probability of cycle slip of the GNSS can be reduced effectively, the integer ambiguity searching space of the GNSS is reduced, attitude measurement information is guaranteed to be continuously outputted, and the tracking loop robustness of the GNSS is enhanced; and with the assistance of a double-antenna GNSS, quick initial alignment of the INS can be realized, the attitude observability of the INS is improved, and the attitude divergence of the INS is inhibited.

A viewer for viewing stereo images either downloaded over a network, such as the Internet, or resident on a personal computer uses a graphical user interface (GUI) to facilitate the display of wireframes with or without texture applied in a variety of formats. In stereo mode, the GUI permits adjustment of the neutral plane and of camera offset. The file sizes utilized with the viewer are very small and permit rapid transmission over a network. The files contain wireframe information, texture map information and animation information.

The invention discloses functional fatty powder and a preparation method thereof, and belongs to the technical field of feeds. The functional fatty powder is characterized in that raw materials comprise the following components in parts by weight: 30-50 parts of concentrated omega-fatty acid fat, 10-20 parts of lecithin, 8-15 parts of concentrated linolenic acid fat, 8-15 parts of MCT, 1-5 parts of choline, 1.5-5.5 parts of nicotinamide, 1-5 parts of a composite emulsifying agent, 3-8 parts of a composite antioxidant, 2-8 parts of vitamin C, and 40-70 parts of encrusting substances or 30-60 parts of carriers. The functional fatty powder provided by the invention is small in addition quantity, high in cost performance ratio, good in stability, high in nutrient value and high in fat utilization rate; the functional fatty powder not only can greatly improve the growing property and the reproductive property of animals but also can improve the immunity of the animals and promote the development of animal organisms, so that the functional fatty powder is an excellent feed additive.

The invention discloses a high-sensitivity satellite navigation signal capturing method and a system. The system comprises a digital down-conversion module, an average sampling and block accumulation module, an FFT (fast Fourier transform) module, a circumference shifting module, a local PRN (pseudo random noise) code FFT conjugate memory, a complex multiplier module, an IFFT (inverse fast Fourier transform) module, a differential coherence integration module, a peak detection module and a sequential control module. The digital down-conversion module realizes digital down-conversion operation for satellite digital intermediate frequency signals; the average sampling and block accumulation module averagely samples satellite data and completes a block accumulation function; the FFT module searches code phase frequency domains; the circumference shifting module utilizes Doppler circumference shifting search to replace frequency compensation; the local PRN code FFT conjugate memory stores a local PRN code FFT conjugate result; the complex multiplier module realizes signal de-spreading; the IFFT module calculates different code phase coherence results; the differential coherence integration module accumulates differential coherence energy of de-spread satellite signals; the peak detection module realizes signal capturing output; and the sequential control module controls timing sequence of the various modules of the system. Weak signal capturing speed and sensitivity of a satellite navigation receiver are improved, and parameters can be configured flexibly.

The invention provides an airborne laser communication equipment and a control method thereof. Beacon light and source light are received by the same receiving antenna, separated, processed and transmitted to a control module, pitch and azimuth angles of equipment are regulated on the basis of received beacon light and source light signals, signal tracking is performed, and fed-back beacon light and source light signals are transmitted through two different transmitting terminals, so that exchange work of signals of both sides is guaranteed. The airborne laser communication equipment and control method thereof solve the technical problems that the communication speed and the image resolution cannot meet requirements and wide coverage and real-time transmission cannot be guaranteed simultaneously in the prior art.

The invention relates to a high dynamic satellite navigation signal rapid capture and tracking system and method. The method comprises the following implementation steps that S1, related parameters are set according to the capture requirements, and intermediate frequency signals are read to be mixed with local carrier; S2, windowing is performed on PMF and FFT modules based on the conventional PMF+FFT to implement capturing; S3, an adaptive threshold adjustment method is adopted on signal peak judgment after FFT operation so as to obtain the capture result; S4, the process enters the tracking stage, frequency mixing and pseudo code correlation are performed on the intermediate frequency data and the result after correlation is integrally cleared so as to obtain a coherent integral value; S5, dimension enlarged unscented Kalman filter is adopted for carrier tracking, and the state vector optimal estimation value is obtained according to the dynamic model and the measurement model of the system; and S6, the conventional code ring under carrier aiding is adopted in code tracking. According to the method, the problems of rapid capture and tracking of the high dynamic satellite navigation signals can be solved, and the dynamic performance can be 100g.

The present invention is a flatbed scanner operating with a digital image capture module comprising two-dimensional (2D) optical image photo-sensor and in particular with a digital camera or digital video camera. The present invention further relates to flatbed scanners and means and methods of supporting cameras, and particularly, although not exclusively, to a flatbed scanner housing for holding a digital camera to allow the digital camera to act as a document capture device in obtaining digital images suitable for downloading to a personal computer or other computer peripherals such as a printer. The scanner incorporates an image capturing module comprising 2D image photosensor and assembly such as flash light, electronic circuit, and software inside the flatbed scanner box to function like an image capturing module where said scanner box functions like the camera body with an internal lens internal.

An apparatus and method for obtaining a data file representing a natural color three-dimensional image of the surface of a subject are disclosed. The apparatus incorporates a plurality of scanners, each comprising illuminating means and digital camera means, disposed about the subject, and computer means to correlate the images and store the data file. An apparatus and method for producing a natural color three-dimensional model from that data file are also disclosed. The use of rapid prototyping and manufacturing technology for manufacturing a model is disclosed. The present invention is particularly applicable to human subjects.

The invention discloses a rapid acquiring method suitable for a GPS (Global Positioning System) weak signal. The rapid acquiring method comprises the following steps of (1) taking a section of data of an Mms intermediate frequency signal, wherein M is larger than 1 and is less than or equal to 10; dividing the section of the data in a plurality of 1ms data, carrying out coherent integration by applying a frequency domain circular correlation method based on FFT (Fast Fourier Transform), carrying out incoherent accumulation for every result, and obtaining the primary frequency of the intermediate frequency signal and a pseudo code initial phase; (2) stripping pseudo code information in the intermediate frequency data by multiplying a section of intermediate frequency data which is additionally used with the pseudo code initial phase obtained in step (1); and (3) setting 21 to-be-acquired frequencies within a frequency shifting range [-500Hz, 500Hz] according to the primary frequency obtained in step (1), carrying out time domain sliding acquisition, and obtaining a carrier frequency with the accuracy being 50Hz. The rapid acquiring method disclosed by the invention has the advantages that the acquiring speed is rapid, the acquiring accuracy is high, the operating amount is less, the carried frequency error can be controlled within 25Hz, and the treating efficiency of a follow-up circuit is greatly increased.

The invention discloses a method for utilizing an Ethernet-card to rapidly capture packet on a Linux system, the method comprises mapping an Ethernet-card DMA receiving caching area on a user area, achieving the purpose of simultaneously capturing packets for a plurality of Ethernet cads through reducing data packets to reach a user area and copying times of a user program and starting a thread packet capture with every Ethernet card, reducing dispatching cost of interrupt handling through shutting interruption to actively enquire and receive, defining cache and management thereof which are repeatedly used, reducing cache application and releasing cost, reducing the conflict of visiting cache between the packet capture thread and packet processing thread, realizing the rapid capture of Ethernet data packets and ip packets which are transferred on the Ethernet data packets.

The invention provides a data packet capturing, processing and sending method which comprises the following steps: a memory space with a preset size is distributed according to the page size of a system; a memory is mapped to a user address space from a kernel space to make a user program be associated with the memory in the kernel space; received data packets are sequentially stored into multiple continuous DMA buffer areas in the memory space in the mode of direct memory access; the use program conducts concurrent processing on the data packets in the N DMA buffer areas through m threads, wherein m refers to the number of kernels of a processor; the data packets which are processed in the N DMA buffer areas are sequentially sent out. By means of the data packet capturing, processing and sending method, quick capture, concurrent processing and linear speed sending are combined organically, as a result, the defect that a zero copy technology cannot timely process captured data packets is overcome, and certain technical support is provided for a safety audit system. The invention further provides a data packet capturing, processing and sending system.

The invention discloses a method for acquiring the C / A code signals of a GPS in the GPS communication technical field. The method comprises a rough acquisition process and a precise acquisition process. The rough acquisition process comprises the following steps: searching a plurality of parallel satellites set by a system and obtaining a rough code phase and carrier frequency by using code phase search based on FFT; and the precise acquisition process comprises the following steps: setting a precise acquisition carrier frequency step according to the code phase and the carrier frequency obtained from rough acquisition and determining the search scope of precise acquisition; and removing the correlation between input signals and local carrier signals influenced by the code phase and comparing a correlation value and a resetting threshold value to determine whether satellite signals can be really acquired. Compared with the prior GPS acquiring method, the invention improves the acquisition performance of GPS signals, ensures the GPS fast acquisition, and simultaneously achieves the high-accuracy requirements of the GPS acquisition.

The invention belongs to the field of energy storage materials and particularly relates to a modified carbon dioxide shaped phase change material and a preparation method thereof. The energy storage material comprises the following components in percentage by weight: 10-90wt% of an organic phase change material and 10-90wt% of a chemical bond bonded carbon material modified carbon dioxide supporting material, wherein the structure of the chemical bond bonded carbon material modified carbon dioxide supporting material is shown in a general formula (I) shown in the description, R is CnH2n straight chain saturated alkyl bonded with a carbon atom, n is greater than or equal 2 but less than or equal to 5, and n is an integer; Carbon represents the carbon material. The energy storage material provided by the invention has the advantages of great energy storage density and high stability, is suitable for the field of energy-saving building materials, solar energy storage and utilization, industrial waste heat recovery and the like, and has a broad application prospect.

A method to operate a camera to focus on a selected object or a process object of interest in an industrial installation, and automatically calculating which camera or cameras are in line of sight of the object of interest utilizing measurements on a 3D model of the installation and the cameras. A system is also described. The camera may be automatically operated to move, or pan or tilt or zoom the camera so as to point and focus on the process object of interest. A video stream or an image of the object of interest is then generated and displayed.

The embodiment of the invention provides a video screenshot or clipping method, a video screenshot or clipping device and a mobile device. The method comprises the steps of acquiring voiceprint information in a voice sample; scanning target video according to the voiceprint information, and acquiring a time point when a voice matched with the voiceprint information appears in the target video; and carrying out screenshot or clipping on the target video according to the acquired time point. Through adopting the technical scheme provided by the embodiment of the invention, the voice sample and the target video can be designated when a user uses the mobile device to carry out a video screenshot or clipping operation, the mobile device can scan the target video automatically according to the voiceprint information acquired from the voice sample, a video image or the video content matched with the voiceprint information is intercepted, the algorithm is simple, the interception accuracy is high, and quick interception can be realized. The whole operating process is simple and convenient, the user does not need to manually select the interception position, and user requirements can be met.

Whole Doppler range of signal is divided into frequency sweep points. Using united non-coherent detecting energy in parallel de-spread on all frequency sweep points, the method finds out maximum value. Comparing the maximum value with referenced threshold determines whether signal is captured, and carrier frequency and phase of de-spread code. Under limited resources, the method avoids complex calculation, and realizes quick capturing signal. In condition of large frequency deviation and high dynamic signal, the invention guarantees stable, high performance quick operation in whole dynamic range. The invention is applicable to area of satellite communications and wireless communication based on spread spectrum.

The invention provides a method for reducing capturing time of a spreading code in a large dynamic range and aims to provide a spreading code capturing method which is large in dynamic application range and can obviously shorten the capturing time. The technical scheme for realizing the method comprises the following steps of firstly, performing down-sampling and storage on baseband data subjected to down-conversion at two-time spreading code speed, reading stored data from a storage by a high-speed clock, dividing a frequency channel according to a Doppler frequency offset range, and performing Doppler frequency compensation on the read data according to the center frequency of each frequency channel; secondly, generating the corresponding spreading codes in the local place according to a code clock subjected to Doppler frequency compensation and corresponding to each frequency channel, and sampling and storing the spreading codes generated by different frequency channels by a two-time standard code clock; and finally, reading the spreading code corresponding to each frequency channel from the storage by the high-speed clock, and performing correlation calculation on the spreading codes and a signal subjected to the Doppler frequency compensation, wherein the pseudo-code phase and the Doppler which correspond to the highest correlation value are the final capturing result.

The invention provides a system for rapidly acquiring GLONASS satellite signals in a field programmable gate array (FPGA), which filters and down-sampling data after down-conversion, stores the data and samples and stores local codes by utilizing a high-speed clock to drive the whole acquisition circuit. After the data is stored, a control unit controls data output in a data storage and a local code storage, and relevance and accumulation of the data is finished through a partial matching filtering unit. A fast fourier transform (FFT) unit takes charge of carrying out spectrum analysis on the data after partial matched filtering, a threshold is acquired by calculating operation results of FFT, a doppler frequency shift and a code phase corresponding to an output peak value after detection of the peak value are acquired, and then rapid acquisition of the GLONASS signals is finished. The system for rapidly acquiring the GLONASS satellite signals in the FPGA has the advantages of being fast in acquisition speed, few in occupied resource, and suitable for rapid acquisition of the satellite signals by means of a GLONASS receiver under a highly dynamic environment.

The invention discloses a method for determining timing for capturing a tumbling target by a free floating space robot. The method comprises the following steps: establishing a movement equation of the tumbling target; analyzing a working space of the free floating space robot; proposing three criterions for determining the optimum capturing timing; and finally verifying the effectiveness of the method through examples. According to the method disclosed in the invention, the three criterions for determining the timing prevent a mechanical arm from colliding the tumbling target, so that an end effector has better operation flexibility and operation ability, the capturing can be completed rapidly, and benefit is brought to enable the robot in the future space to safely, reliably and rapidly execute the task of capturing the tumbling target.

The invention provides a method for quickly acquiring GPS signals and a GPS signal quick acquiring system which comprises the method. The main hardware parts of the system mainly comprise a quick acquisition module; the quick acquisition module acquires the GPS signals in parallel in large scale, obtains the initial phase and frequency information of the GPS signals and sends the signals to a correlator; and the correlator completes the carrier removal correlation of corresponding phase and frequency, and then accumulates the data and saves the data in a register. A microprocessor schedules the assembly lines of the quick acquisition module and the multi-channel correlator, simultaneously distributes the satellite number of the next quick acquisition module, confirms the data given by the channels of the correlator by quick detection algorithm processing so as to quickly and accurately acquire the GPS signals.

The invention discloses a ground-space-based integral measurement and control system applied to a terrestrial space. The system includes a ground measurement and control station; a relay satellite; anair vehicle including an upper antenna, a lower antenna, a radio frequency front end, a transceiving assembly and an air vehicle management computer, wherein the upper antenna and the lower antenna are used for receiving and transmitting of ground-base uplink and downlink signals and space-based forward and backward remote control signals; the radio frequency front end is used for performing filtering hybrid amplification on signals and outputting the signals; the transceiving assembly is used for conversion through modulation and demodulation and for receiving CCSDS remote measurement framesor acquiring positioning information according to remote measurement parameters of the transceiving assembly itself and calculating the optimal direction transmission of the space-based forward remote control signals; the air vehicle management computer is used for transmitting the received positioning information and the calculated optimal direction of the space-based forward remote control signals to the radio frequency front end for transmission switching between the upper antenna and the lower antenna and transmitting selected space-based backward remote control signals to the relay satellite. According to the invention, a ground-based and a space-based remote measurement and remote control links can be implemented at the same time and whole course coverage of flight tasks is realized.

The invention discloses a high-performance condensation heat exchange tube based on a bionic structure. The high-performance condensation heat exchange tube based on the bionic structure is used for efficiently condensing water vapor or organic steam and removing the condensed fluid in time. The condensation heat exchange tube comprises a heat exchange tube base tube (1) with a hydrophobic micro-channel structure, a super-hydrophobic base (2) arranged on the surface of the heat exchange tube base tube (1), the hydrophobic micro-channel structure (4) distributed on the super-hydrophobic base (2) and a needle-shaped hydrophilic bionic structure (3) distributed on the hydrophobic micro-channel structure (4). According to the high-performance condensation heat exchange tube, the heat exchangetube base tube is treated by the spray drying technology based on the ultrasonic atomization, so that the surface performance of the material is effectively improved, the surface energy is reduced, and more stable bead-shaped condensate is formed on the surface of the heat exchange tube; and the hydrophobic micro-channels distributed on the condensation surface can guide the liquid beads moving tothe root of the needle-shaped hydrophilic bionic structure to be away in time so that the condensation circulation can be carried out smoothly.