103 results about "Based wide" patented technology

In one embodiment, a method for sensing an image of a scene includes receiving incident light at a image sensing device including an array of at least two regions of pixel elements, providing one or more control parameters where each of the control parameters modifies the sensitivity of the pixel elements, generating control signals for the one or more control parameter for each region of pixel elements where the sensitivity of the pixel elements is varied on a region by region basis. In another embodiment, method for sensing an image of a scene includes generating control signals for controlling two or more control parameters for controlling the pixel elements of an entire array to provide continuous fine grain control of the sensitivity of the pixel elements.

The invention discloses a display base wide in application range, and relates to the related technical field of computers. The display base comprises a bottom plate. A base is fixedly connected to the top of the bottom plate. Bottom rods are fixedly connected to the bottom of the inner wall of the base. The tops of the bottom rods are movably connected with a movable plate through groove holes. A lead screw groove is fixedly connected to the top of the movable plate. A rotation rod penetrates one side of the lead screw groove, the end, located outside the lead screw groove, of the rotation rod is fixedly connected with a rotation handle, a clamping groove is formed in the surface of the end, located in the lead screw groove, of the rotation rod, and a clamping device is movably connected in the clamping groove. According to the display base wide in application range, the rotation rod is driven to rotate through rotation of the rotation handle, the rotation rod is used for driving a lead screw to rotate, then the movable rod is driven to move left and right, a vertical plate is driven to move, and fixing of displays different in size is achieved; and through the clamping device, the rotation rod is tightly clamped, loosening is avoided, the fixing effect is good, and universality is high.

The invention relates to a photogrammetry-based wide-field binocular vision calibration device and a calibration method. The method comprises steps: a standard camera for calibrating inner parameters is used for acquiring three-dimensional coordinates of marking points of a first target and a second target in a world coordinate system through encoding and decoding; a first camera is used for acquiring the image of the first target, and a second camera is used for acquiring the image of the second target; the images acquired by the first camera and the second camera and the three-dimensional coordinates of the marking points in the world coordinate system are used for binocular vision calibration, and thus rotation matrixes and translation vectors when the first camera coordinate system and the second camera coordinate system are converted to the world coordinate system are acquired respectively. The photogrammetry-based wide-field binocular vision calibration device and the calibration method has the advantages of simple calibration process, easy operation, high precision, low cost and low measurement environment requirements, and can be applied to industrial field measurement.

The invention discloses a bidirectional full-bridge converter-based wide-output voltage range control method for soft switching. The method comprises the following steps: setting working frequencies of all switch tubes of a bidirectional full-bridge converter to be the same, and setting dead time of upper and lower switch tubes of a same bridge arm; determining a power phase-shift angle and a modulating phase-shift angle to be adjustable variables; obtaining conditions of a primary bridge of the bidirectional full-bridge converter for achieving soft switching according to the power phase-shift angle and current constraint conditions of an half cycle, and determining the range of the power phase-shift angle; and determining the relationship between the power phase-shift angle and the modulating phase-shift angle under the maximum power condition and changing a synchronous timing sequence according to the obtained calculation result. The advantages of achieving soft switching within a full-power range and easily achieving wide-range adjustment of the output voltage by the full-bridge converter can be achieved; and zero-voltage switching of all power tubes on a primary side and a secondary side is achieved within the wide-voltage output range from an idle load to a full load.

A Video Call Distributor, including systems and methods, for distributing high quality real time video calls over an IP Packet-Based Wide Area Network and for routing those calls based on an ability to communicate and leverage existing routing rules and logic of a call management system, such as a traditional PBX-based.

The invention provides a parallel TCP (Transmission Control Protocol) technology based wide area network (WAN) communication acceleration method. The method comprises the following steps of: when a proxy server monitors that a client in a local area network (LAN) sends a session connection request to a server in a target LAN, establishing a session connection between the proxy server and a proxy client, i.e. a first session connection; based on a WAN environment, establishing a parallel TCP tunnel between the proxy server and the proxy client; connecting the proxy client and the server through a session connection based on session pool distribution, i.e. a second session connection; and carrying out data communication by the client in the LAN with the server in the target LAN through a communication channel formed by the first session connection, the parallel TCP tunnel and the second session connection. The invention can effectively reduce the time expense of the data transmission of the WAN and accelerate the speed of file and data transmission.

The invention relates to a large-grid wide-area asynchronous control method, which belongs to the field of emergency control of power systems. The method comprises the following steps of (1): real-time state computation of a main network frame of a wide area measurement system (WAMS)-based power grid, which is to eliminate the false and retain the truth through data pre-treatment, inhibit or eliminate noises to the largest extent, and highlight the useful information of the wide area measurement system in a grid dynamic process to provide characteristic quantity for stable analysis and control; (2) real-time analysis of stability of grid power angle, which is to detect and predict asynchronous process of the system based on the synchronous phasor of the integral main power grid by combining a system analysis method, and find out an asynchronous section in space; and (3) presentation of a coordinate control strategy for asynchronous disconnection, which is to present a backup disconnection control measure when the asynchronous section deviates to the section which is not controlled by disconnection and guarantee reliable disconnection when the large-grid becomes asynchronous. According to the method, a WAMS-based wide area asynchronous emergency control is provided, the running state of the power system can be monitored and controlled in real time, possible power angle instability of the power system can be predicted, the chain reactions of large-grid resistance is guaranteed, and influences of grid accidents on national economy and people's live are avoided.

The invention discloses an IMU information-based wide dynamic image fusion method. According to the method, different shutter time is set, the same scene is subjected to multiple times of long exposure and short exposure, and then three frames of images of which bright and dark area contrasts are relatively large are selected, including the shortest exposure image frame, the moderate exposure image frame, and the longest exposure image frame; the three frames of images are divided into M areas respectively, each area is subjected to Euler angle multi-data fusion attitude calculation based on information detected by an IMU sensor to obtain a motion vector of each area, and a motion vector mean is calculated to be used as a correcting value to perform registration correction on each image frame; and the different exposure images that are corrected are subjected to segmented linear fitting by adoption of the least square method in combination with a camera response function and a luminance mapping function, then wide dynamic images are obtained through mapping, and finally, the wide dynamic images are fused by a multi-frame accumulation method. Through adoption of the method, a phenomenon that a transition area generated by direct fusion of two frames of images is unnatural is optimized, and thus the clear and natural wide dynamic images are obtained.

A dual-camera device is provided. The dual-camera device includes wide and telephoto imaging sections with respective lens/sensor combinations, and a processor. The wide and telephoto imaging sections provide wide image data and telephoto image data, respectively. At least one misalignment error exists between the wide and telephoto imaging sections. The processor generates an output image provided with a smooth transition when switching between a lower zooming factor and a higher zooming factor. The processor warps the wide image data using a portion of the misalignment error to generate base wide image data, and warps the telephoto image data using the remaining portion of the misalignment error to generate base telephoto image data. The processor generates the output image using the base wide image data at the lower zooming factor, and generates the output image using the base telephoto image data at the higher zooming factor.

A quantization-based wide-area power system output feedback control method comprises the following steps that: 1) the information acquisition is finished through a PMU in a wide area measurement system, the PMU measures a power system state quantity at a fixed sampling period, and establishes a closed loop power system discretized state space model by taking T as the sampling period; 2) all states of the system are difficult to be measured in a real system; 3) and the obtained power system model is subjected to stability analysis by adopting a Lyapunov stability theory and a linear matrix inequality method, so that an inequality (15) is satisfied, and controller gains are designed for analysis validation. The quantization-based wide-area power system output feedback control method can ensure the stability of the power system with a quantizer, effectively alleviates the communication network congestion, reduces the construction costs of a communication network, saves storage space of a data storage center, is conducive to the expansion of the system, and increases the economic benefit.

An embodiment of the invention provides a method and a device for decision tree based wide-area remote sensing image classification. The method includes acquiring an image set to be classified; dividing the image set to be classified into multiple groups according to time phase characteristics and enabling each group of images to have the same spectrum characteristics; respectively sampling the same groups of images uniformly to acquire sample data, extracting characteristics of the same groups of images, and then carrying out band combination so as to acquire multi-characteristic band-combination images; and inputting the sample data and the multi-characteristic band-combination images of the same groups of images to a decision tree classifier to acquire classified images. The method and the device have the technical advantages that a wide-area land cover classification decision according to decision tree based sensing image classification is provided, and wide-area remote sensing image classification precision is improved.

The invention relates to a cubic silicon carbide (3C-SiC) monocrystal film with reversed extension growth on a Si base and a preparation method thereof, belonging to the preparation field of novel Si-base wide band-gap semiconductors, wherein the cubic silicon carbide (3C-SiC) monocrystal film with reversed extension growth on the Si base is formed by diffusing carbon on the Si base to Si and reacting with the Si. The method adopts low-temperature chemical vapor deposition (LPCVD for short), comprising the following steps of: diffusing the carbon to the Si by utilizing methane decomposition at high temperature to effectively displace the Si, and forming the 3C-SiC monocrystal film with the stoichiometric ratio of 1:1 by using a reversed extension growth mechanism, wherein the thickness of the 3C-SiC monocrystal film can reach the micrometer level, the electronic Hall mobility at the room temperature reaches 1.22*10<3> cm<2>/(V.S), and the electronic Hall mobility in liquid nitrogen reaches 2.06*10<3> cm<2>/(V.S). The impurity concentration and the condition type of the 3C-SiC monocrystal film prepared in the method can be controlled through the impurity concentration and the condition type of a monocrystal silicon substrate, and the impurity concentration in the film is uniform. The preparation method can be used for obtaining the Si-base reversed extension 3C-SiC monocrystal film with low stress and high quality.

The invention belongs to the technical field of damping materials and discloses a network structure design-based wide-temperature range polyurethane elastomer damping material and a method and application thereof. The network structure design-based wide-temperature range polyurethane elastomer damping material is prepared from, by weight part, 11-37 parts of polyurethane prepolymer, 7-30 parts of suspension chain prepolymer and 1-25 parts of terminal hydroxyl hyperbranched polyester, wherein the polyurethane is obtained through reaction of polyester glycol and diisocyanate under the action of catalyst. The network structure design-based wide-temperature range polyurethane elastomer damping material achieves an effective damping temperature range width of 170 DEG C and obtains excellent damping performance within the temperature range width, and the damping factor tan delta is higher than or equal to 0.3. Meanwhile, the network structure design-based wide-temperature range polyurethane elastomer damping material is good in high-temperature and low-temperature damping performance and achieves a high-temperature effective damping temperature up to 120 DEC, thereby having a good application prospect.

Apparatus and methods are presented herein that permit real-time, accurate detection of residual tumor in the operating room. The Raman-based wide-field imaging apparatus and methods described herein permit real-time imaging of tumor-targeted R-MR nanoparticles over a wide field.

The invention discloses a quick titling mirror-based wide view field confocal scanning microscope, consisting of a light source assembly, a two-dimensional imaging scanning assembly, a wide view field scanning assembly and a detector assembly. The confocal scanning microscope device preferably uses the design of a spherical reflector telescope to avoid the high-order aberration of the system and simultaneously compensates the low-order aberration of the system by using a cylindrical lens. By using the synchronous work of the quick tilting mirror and the two-dimensional scanning imaging assembly, a high-resolution image at the eye bases of human eyes (or a sample additionally provided with an objective lens) in a wide view field range can be acquired by using an automatic splicing technology on the basis of acquiring a single-frame image in a small view field. The invention mainly overcomes the difficulty that the high resolution and the wide view field synchronously image, realizes the wide view field confocal scanning microscope with compact design, high imaging resolution and wide imaging view field and greatly improves the imaging view field and the imaging quality of the traditional confocal microscope. Therefore, the invention can realize the high-resolution imaging on the eye base of the human eye (or a sample to be detected) in the large view field range.

The invention discloses a small-sized radar-based wide-area icing monitoring and pre-warning method for a power transmission line. The method comprises the following steps: 1, arranging and mounting a radar device and a microclimate sensor according to a corridor condition of the power transmission line; 2, setting a time interval-t, extracting weather observation data in real time at the time interval serving as a unit, transmitting the data back, and caching the data into a database; 3, analyzing radar data, and when a snow condition is met, deducing the icing condition of the line via a power transmission line icing and ice melting calculation model according to data of the microclimate sensor; 4, setting a pre-warning threshold value according to a tower parameter, and when the icing value is greater than the threshold value, performing icing pre-warning. According to the small-sized radar-based wide-area icing monitoring and pre-warning method, the small-sized radar supplies the detailed weather condition of a line corridor; the small-sized radar-based wide-area icing monitoring and pre-warning method has the advantages of wide monitoring range and high weather data precision. In the method, the tower parameter is used for icing thickness pre-warning for the first time; compared with the existing method for pre-warning the icing thickness based on the line theory, the method is higher in accuracy.

The invention relates to an SCM (single-chip microcomputer)-based wide-range accurate measuring method for the real-time rotating speed of a motor. A designed speed measuring system comprises a speed-measuring generator or a linear Hall element, a signal amplification module, an A/D conversion module, an SCM processing module as well as a speed output and display module. The accurate and real-time rotating speed of the to-be-measured motor is directly estimated with a numerical algorithm running in the SCM processing module according to the sine induced electromotive force output by the speed-measuring generator or the linear Hall element, the problem that traditional simulation speed measuring circuits have low-rotating-speed feedback blind zones is mainly solved, and wide-range accurate measurement of the continuous and real-time rotating speed of the to-be-measured motor is realized.

The invention relates to a method for preparing a high-resistance transparent zinc oxide (ZnO) thin film by utilizing direct current magnetic control sputtering equipment, which is characterized in that based on Zn-rich (or O2-inefficient) zinc oxide-based wide bandgap ceramic material target, direct current magnetic control sputtering is utilized to replace traditional radio frequency magnetic control sputtering to prepare the high-resistance ZnO-based transparent thin film, and the transparent thin film is used for the diffusion barrier layers and the window layers of thin film solar cells. Through regulating technological parameters, the resistivity of the prepared high-resistance ZnO-based transparent thin film can be controlled to be within the range of 104-108omega.cm, and the average transmissivity in visual and near infrared zones is about 90 percent. Compared with the high-resistance ZnO-based thin film prepared a radio frequency magnetic control sputtering method based on a commercial intrinsic ZnO ceramic target, under the condition of same film thickness, the transmissivity, the resistivity and the surface toughness are equivalent to those of the thin film prepared by the method of the invention. The high-resistance transparent zinc oxide (ZnO) thin film has a simple preparation process, low cost and high transparency in the visual and near infrared zones, and can be widely applied to the field of transparent electronics and novel photoelectric devices, especially the thin film solar cells.

The invention provides a CT based (Computerized Tomography) wide-breadth dynamic three-dimensional human body scanning system. The CT based wide-breadth dynamic three-dimensional human body scanning system comprises a near-infrared transmitter, a near-infrared receiver, a color camera and a PC (Personal Computer) end; the near-infrared transmitter is used for transmitting light covering human body surfaces; the near-infrared receiver is used for collecting light reflected by a human body; the color camera is used for collecting color image data of the human body; the PC end constructs a three-dimensional profile of the human body through simultaneously collected color data and depth data according to the receiving time difference of different light of the near-infrared receiver; the PC end constructs a positioning image according to an obtained three-dimensional human body surface patch image; the PC end confirms a CT scanning region according to the positioning image and controlling the radiation dosage during CT scanning according to a transverse image of the three-dimensional human body surface patch image. The CT based wide-breadth dynamic three-dimensional human body scanning system can well construct a starting position and a terminal position of scanning and controls the radiation dosage at different positions according to the section of the three-dimensional human body profile.

The invention provides an adjustable transformer ratio-based wide-input LLC resonant converter and a regulation and control method. The adjustable transformer ratio-based wide-input LLC resonant converter comprises an inversion module, a resonance module, a transformer and a rectification module, wherein after an input voltage passes through the inversion module and the resonance module in sequence, the input voltage is subjected to voltage reduction through the transformer; then a stable direct current voltage is output through the rectification module, and taps are arranged on the secondary side of the transformer and are used for adjusting the transformer ratio according to the magnitude of the input voltage. By adoption of the LLC resonant converter designed in the invention, a relatively small switching frequency variation range can be maintained, and can be basically stabilized between 0.8fr and fr (which is illustrated in the specification); and meanwhile, the stable output voltage can be guaranteed in a relatively wide input voltage range, so that the efficiency and the stability of the LLC resonant converter are improved.