91results about How to "Guaranteed redundancy" patented technology

The invention belongs to the technical field of autonomous running and visual perception, particularly relates to a multi-camera visual perception system for a UGV (Unmanned Ground Vehicle) and aims to solve the problems of single perception algorithm, poor real-time performance, poor system expandability, inconvenience in debugging, limitation to the view field control and the like of an image processing system of the existing UGV and autonomous mobile robot. The system comprises a plurality of vehicle-mounted image processing industrial personal computers and one or a plurality of debugging monitoring computers, wherein each vehicle-mounted image processing industrial personal computer is connected with three cameras; one or a plurality of debugging monitoring computers are used for controlling the vehicle-mounted image processing industrial personal computers by a wireless router; and a control mode can be a redundancy control mode and also can be a respective control mode. In the system, an optimized visual perception method on the basis of multiple threads is adopted; and threads comprise a multi-camera video acquisition thread, a lane line perception thread, a barrier, cone bucket and signal lamp perception thread and the like. Compared with a conventional single-thread visual perception method, the optimized visual perception method on the basis of the multiple threads has higher real-time performance, stability and expandability.

The invention an electric-energy quality data compression and reconstruction method based on self-adaptive dictionary learning, and self-adaptive dictionary learning is used for sparse representation of electric-energy quality data. A lot of different types of electric energy quality data form a training sample set, and the completeness and redundancy of the training sample set are ensured; basic atom sparse codes which can represent the electric energy quality data is extracted from the training sample set adaptively, and a self-adaptive dictionary is obtained via iteration; a random Gauss matrix is used to carry out dimension-reducing measurement on electric energy quality test signals, and compression sampling is realized; and on the basis of compressed perception theories, the self-adaptive dictionary is used for sparse solution to obtain a sparse representation matrix of test signals, and the original signals are decoded and reconstructed. Thus, the electric energy quality data is compressed and sampled simply and reconstructed accurately, the sampling efficiency of the electric energy quality data is improved, and storage of redundant data is reduced.

The invention discloses a general industrial controller, including a general industrial computer, a control bus and a controller. The controller includes site bus scanners, target manager, control strategy scanners and redundancy couple manager. The site bus scanner realizes the reception and sending of the real-time data on control bus. The target manager conducts a transparent visit to all the real-time data on all the nodes of control bus and can regulate the number of nodes. The control strategy scanner makes each node use different general industrial computer to operate according to different functions, and manages on-line and schedules each control function block. The redundancy couple manager realizes the mutual interaction between the two machines for hot standby, to judge their own state and other state to inform each other, and switch when necessary, and transmit the data for the inverse calculations of guard machine function block.

The invention discloses a liver ultrasonic image identification method based on sparse expression. The method comprises the following steps of: (1) selecting an interested area from a liver ultrasonic image training sample with a space-occupying lesion area; (2) extracting a gray scale symbiosis matrix texture ratio characteristic, a fractal characteristic and a abrupt change rate characteristic of the interested area; (3) utilizing a dictionary expansion method based on sparse reconstruction to construct an expanded dictionary by the image characteristics obtained in the step (2); (4) utilizing the expanded dictionary obtained in the step (3) to construct a classifier based on sparse expression; and (5) inputting the image characteristics of a testing sample into the classifier for identification and judgment, and identifying out the liver ultrasonic image with the space-occupying lesion area. According to the invention, the classified identification accuracy is high, and each index accords with a clinical diagnosis range.

Provided is a distributed wireless fingerprint positioning method free of off-line training, comprising a fingerprint database establishing phase, a fingerprint coupling phase and a positioning phase, and characterized in that off-line information collection is not needed, but each anchor node sends a request message to neighbor anchor nodes; each neighbor anchor node receiving the request calculates the signal intensity, and returns results to the anchor node sending a request; the anchor node sending a request generates fingerprint database information fi which is directly stored in the node and the neighbor anchor nodes. In a positioning system, when anchor nodes are numerous and are distributed uniformly, the off-line training workload and the fingerprint database maintenance workload of the positioning system are as small as possible; in case of outage, damage or increase of specific anchor nodes, the system can work normally.

The invention discloses an H.264 standard motion vector-based method for embedding and extracting a fragile watermark, which belongs to the technical field of information security. Watermark information is selectively embedded into the motion vector of a frame P in front of a frame I, so that watermark capacity and fidelity are high; the watermark information comprises a frame number and a time stamp, and is encrypted with a symmetric cryptographic algorithm, so that the watermark information has attack resistance and video tampering can be positioned at a certain accuracy; and an implementation process is performed in a compressed domain, computation complexity is low and the influence on a video coding bit rate is low.

The invention relates to an annular dual-bus redundancy protective structure of passive optical network which includes: an OLT system, an annular net controller and a plurality of light function structure units with special structure. Four input ports of the annular net controller connect with corresponding light switches respectively, four light switches connect with corresponding light coupler modules, each light coupler module connects with a light detection function module and corresponding light source, then, connects with the light function structure through tow channels main fiber, the whole light function structure is composed of N light function structure units; a, b, c, d ports of a light splitter with four ports in the light function structure unit upper part and down part can be concatenated according to figure or connect with the light coupler module, other four ports are cross connected through the coupler or the light switch, then connect with the corresponding ONU; a light resuscitation module can generate four or a plurality of input ports according to need. The annular dual-bus redundancy protective structure has advantages that: using dual-bus annular net structure can reach better protective redundancy effect, increase system reliability, and heal remarkably quickly; the annular dual-bus redundancy protective structure with low cost can realize uniform network management, and is convenient for system integration.

The invention discloses a novel passive safety shell energy control system which comprises an open circulating heat exchange device, a high-position cooling water tank, a safety shell inner heat exchange device, a low-position cooling water tank and a safety shell outer heat exchange device. The high-position cooling water tank and the open circulating heat exchange device are connected to form an open circulating loop, a valve is arranged on the open circulating loop, the safety shell inner heat exchange device and the safety shell outer heat exchange device are connected to form a closed circulating loop, and a valve is arranged on the closed circulating loop. The novel passive safety shell energy control system can quickly respond to a breaking accident of a high-energy pipeline in a safety shell and can effectively guide out heat in the safety shell to inhibit rising pressure and temperature in the safety shell; a passive structure is reasonable in design, so that failing of the system can be avoided greatly, and safety and economic efficiency of a nuclear power plant are improved.

The invention provides a file previewing method based on Hadoop distribution type. The file previewing method comprises the following steps of: step 1), storing a source file in a Hadoop distribution type file system; step 2), converting the source file stored in the Hadoop distribution type file system into an SWF (Small Web Format) file and a text file; step 3), carrying out index extraction on the text file and establishing index; and step 4), reading the SWF file needing to be previewed and displayed from the Hadoop distribution type storage according to the index so as to carry out playing. The invention also provides a file previewing system based on Hadoop distribution type. By the file previewing method and the system provided by the invention, the timeliness for simultaneous conversion processing of large and multiple files is obviously improved, and the conversion processing capability and the index searching capability of the mass files as well as the smoothness of played and previewed files are enhanced.

The invention discloses a modular storage battery aviation power supply starting system. The modular storage battery aviation power supply starting system comprises a 0-70V power module, a parallel connection and boosting starting component, an autotransformer rectifier, a system controller, a control panel and a plurality of power components, wherein each power component comprises a 28V storage battery, a bidirectional direct current conversion module, a single-phase alternating current inversion module and a three-phase rectifier power module. The modular storage battery aviation power supply starting system can be compatible with inputs of a low-voltage storage battery, a common frequency power network and a diesel generator by carrying out modular design and architectural design on a power supply, can output a multi-system power supply, has the advantages of an aviation storage battery starting vehicle and a static variable frequency power supply at the same time and can meet requirements such as maneuverability, redundancy, diversified power supply forms and continuous guarantee of an aviation guarantee power supply. The power module with multiple functions is adopted and organically combined, and all the power supply forms in an existing aviation field can be met by a single power supply.

The invention provides a power supply management apparatus, a piece of electronic equipment and a power supply management method. The power supply management apparatus is applied in the electronic equipment and is connected with a power supply module in the electronic equipment. The power supply module comprises at least one power module. The power supply management apparatus comprises: a first obtaining module used for obtaining electric power load needed by the electronic equipment, a second obtaining module used for obtaining electric power load provided by the power supply module at present, a comparison module used for comparing the electric power load needed by the electronic equipment with the electric power load provided by the power supply module at present so as to obtain a comparison result, and a first prompt module used for generating a prompt message in dependence on the comparison result. The prompt message is used to prompt whether the power module needs to be increased or decreased at present. The invention can determine the coupling relation between the electric power load needed by the electronic equipment and the electric power load provided by the power supply module at present so as to reduce system costs.

The invention provides a method for forwarding a message via an AP. The method comprises that the AP including n effective member links is created, a unique identification is distributed for the AP, and n represents a positive integer greater than or equivalent to 1; a first type of message is obtained, and a secrete key corresponding to the first type of message is determined according to a feature value in the first type of message; a message characteristic identification is generated according to the unique identification and the secret key; a pre-configured export link table including export link indexes in one to one correspondence with the effective member links in the AP is matched according to the message characteristic identification; and the first type of message is forwarded according to a matching result. At the same time, the invention also provides a device for forwarding the message via the AP. According to the device and method, the message characteristic can be utilized more effectively, link redundancy is ensured, and the flow stability is also ensured.

The embodiment of the invention provides a method and device for achieving the high availability of a Linux system storage device on the basis of an LVM mirror image. The storage device comprises at least two shared magnetic disks with the same storage data. The method includes the steps of establishing data volumes with the same capacity and storage data for all the shared magnetic disks respectively, establishing a journal volume for a local magnetic disk, backing up all the data volumes and the journal volume into the LVM mirror image, deleting an unknown data volume and establishing a new data volume in the unknown shared magnetic disk when detecting the existence of the unknown mirror image data volume, recovering storage data in the unknown data volume into the new data volume through the LVM mirror image technology, and replacing the unknown data volume with the new data volume. The single-point failure problem is effectively solved, data in the shared magnetic disks can be recovered and reused rapidly, the failure disposal and data recovery difficulty is lowered, the redundancy of important service data on the bottom layer is ensured, the continuity of service of the upper layer is ensured, the high availability of the storage device is achieved, and meanwhile hardware cost is saved.

The invention discloses a data hiding method based on a Lagrange interpolation method and multiple clouds, which is applied in a system under a multi-cloud environment. The system comprises four parts: a user, a client, a data uploading layer, a data downloading layer and the clouds; before data are uploaded, an information segmentation algorithm of Reed Solomon erasure codes is used for segmenting the user data on the client, the Lagrange interpolation method is then used for carrying out information hiding on each block of segmented data, and finally, each block of data is stored in a different cloud storage. During data downloading, the data only need to be obtained from part of the cloud storages, the Lagrange interpolation method is first used for carrying out hidden information recovery on each block of data, and a recovery algorithm in Reed Solomon is then used for merging the data blocks to recover the original data. The data hiding method based on the Lagrange interpolation method and the multiple clouds solves the availability problem of services and the limitation of a single cloud storage; while reducing storage spaces, the usage of the Reed Solomon algorithm can tolerate the errors of the cloud storages; the usage of the Lagrange interpolation method solves the confidentiality problem of data, protecting the privacy of user data.

The invention belongs to the technical field of nuclear power station cooling and particularly relates to a sodium-cooled fast reactor intermediate-circuit passive-accident residual heat removal system. The sodium-cooled fast reactor intermediate-circuit passive-accident residual heat removal system is formed by three circuits respectively including a primary circuit formed by a primary side in asodium pool and an intermediate heat exchanger, a secondary circuit projected on the secondary side of the intermediate heat exchanger and the pipe side of an air heat exchanger, and a tertiary circuit formed by the air heat exchanger and atmosphere. By the arrangement, the problem that the independent heat exchanger (DHX) cannot establish the natural circulation in the sodium pool is solved; fournew residual heat removal circuits in addition to the two circuits of the independent residue heat removal system are obtained; support is provided for diversity and redundancy of reactor system safety design; under the condition of power outage of the whole plant, long-term effective cooling through natural circulation for the reactor is provided.

The invention discloses a trellis coded modulation method applicable to an electrical interconnection system among high speed backplane chips, and relates to a trellis coded modulation technology applicable to the electrical interconnection system among the high speed backplane chips. According to the method, by the collaborative design of channel coding and signal modulation, coding gain can be obtained on the premises of not increasing the channel bandwidth and not lowering the transmission rate of effective information, so that the performance of serial single link among chips is improved. A sending end of a system comprises a data parallel/serial conversion, a trellis coded modulation and a forward feedback equalizer. The trellis coded modulation utilizes a measure combining the convolutional encoding and the four-level pulse amplitude modulation. A receiving end of the system comprises a continuous time linear equalizer, a decision feedback equalizer, a clock data recovery, a soft output Viterbi decoding and a data parallel/serial conversion. The update of a coefficient of a filter of the decision feedback equalizer is based on an error correction signal after the soft decision Viterbi decoding.

The invention discloses a double stability control device mutual detection control method and system. The double stability control device mutual detection control system comprises two stability control devices arranged in the same transformer substation, and the two stability control devices are used for sampling detected objects. When detected object sampling results of any stability control device meet overload alarm conditions, overload action enabling signals are transmitted to the other stability control device. After any stability control device is started in an overload manner, when sampling is normal, the current and the power of the detected objects reach constant values and the overload action enabling signals from the other stability control device are received, overload actioninstructions are transmitted to controlled objects. According to the double stability control device mutual detection control method and system, on the premise of ensuring the redundancy of the system, the risk of misoperation of the system is effectively reduced by mutual detection of the two stability control devices, continuous, safe and reliable running of the stability control system is ensured, and safety and stability of an electric power system are effectively improved.

The present invention relates to one kind of guiding magnet system for magnetic suspension vehicle. The guiding magnet system includes several magnet devices with iron core, and the iron core with two planes for windings extends in the longitudinal direction of the vehicle. Windings in even number are arranged in each of the planes for windings. In one end of the magnet device, there are paired electrically serial windings connected to specified control loops; and in the other end, there are either two pairs of similar windings or only one pair of windings. The present invention also relates to one kind of magnetic suspension vehicle with the said guiding magnet system.

A collision detecting device includes a first sensor (2), a second sensor (3, 9), and a determination unit (4). The first sensor is disposed in a rear region of a passenger compartment of a vehicle defined from a first seat row towards a rear of the vehicle. The second sensor is disposed one of in a front region of the passenger compartment defined from the first seat row towards a front of the vehicle and at a side of the first seat row. The determination unit (4) stores a safing threshold (THs) and a main threshold (THm) greater than the safing threshold (THs), and determines that a side collision has occurred only when an output value (V2) of the second sensor (3, 9) is greater than the safing threshold (THs) and an output value (V1) of the first sensor (2) is greater than the main threshold (THm). The invention also relates to an occupant protection system having the above collision detecting device.

The invention provides an array reconstruction method and device based on metadata. The method comprises the following steps: receiving an array reconstruction notice; obtaining each piece of data sector information in the metadata of an array according to the array reconstruction notice; sorting each data sector corresponding to the metadata according to a pre-set array reconstruction strategy and the information of each data sector in the metadata to obtain a corresponding reconstructed chain table; and reconstructing each data sector corresponding to the metadata in sequence according to the reconstructed chain table. With the adoption of the embodiment of the invention, each data sector corresponding to the metadata is reconstructed according to different array reconstruction strategies, so that the reconstruction flexibility can be enhanced and the reconstruction reliability can be improved.

The invention discloses a multi-power-source series-connection type hybrid power unmanned aerial vehicle and a control method thereof. The unmanned aerial vehicle comprises a vehicle body, a left wing, a right wing, a left aileron, a right aileron, a left flap, a right flap, an empennage, a left wing motor, a left wing propeller, a right wing motor, a right wing propeller, a standby propeller module, a horizontal stabilizer, a vertical stabilizer, an elevator, a rudder, an engine, a clutch, an inverter, a power generation/electric all-in-one machine, a storage battery pack, a super-capacitor,an oil tank, a temperature sensor, a pressure sensor, a state-of-charge estimation module and a control module. Enough cruising ability and high maneuverability of the unmanned aerial vehicle can be guaranteed; and meanwhile, the standby propeller module is arranged on the empennage, so when a driving mechanism of the unmanned aerial vehicle breaks down, an engine drives the standby propeller to drive the unmanned aerial vehicle, the situation that the system has a certain redundancy function is guaranteed, and the survival capacity of the unmanned aerial vehicle is greatly improved.

The invention relates to an underwater acoustic target dimension reduction matching sound field positioning method based on a six-member cone vector array, and belongs to the technical field of underwater acoustic target positioning. According to the method, complete information about the azimuth angle, the pitch angle, the depth and the horizontal distance of the sound source can be obtained by utilizing the six-member cone vector array, dimension reduction processing is carried out on final horizontal distance estimation by utilizing estimation information obtained successively, and the estimation efficiency is effectively improved through space scanning dimension reduction. In the invention, the minimum-scale three-dimensional array, namely the six-member cone vector array, is utilized,so that the method not only has full-airspace positioning capability, but also has positioning precision superior to that of a linear array and a planar array, meanwhile, the airspace fractal dimension characteristic advantages of the three-dimensional array are reserved, and the method has good symmetry and stability.