Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

3673results about How to "Reduce operational complexity" patented technology

Polarization code decoding method for cyclic redundancy check assistance

The invention relates to a polarization code decoding method for cyclic redundancy check assistance. When a polarization code is decoded, in all the routes with cyclic redundancy check values of corresponding bit estimation sequences of being zero from a root node to leaf nodes on a code tree corresponding to the polarization code, one route with maximum reliability metric value is searched by taking a list or stack as assistance for route search, and the bit estimation sequence corresponding to the route is output as a decoding result. The method comprises the following operation steps of: determining parameters according to a search assistance method, constructing an auxiliary structure of the decoding method, searching a candidate bit estimation sequence and executing cyclic redundancy check. By adopting the method disclosed by the invention, error correcting capability of a communication system which adopts the polarization code as channel coding is greatly improved, operation steps are simpler, and operation complexity is equivalent to or even lower than that of a Turbo code coding and decoding method used in a WCDMA (wideband code division multiple access) system, thus the method disclosed by the invention has a good practical prospect.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Alarm association rule obtaining method of mobile internet

The invention provides an alarm association rule obtaining method of the mobile internet. A system comprises five parts of the obtaining of alarm data, the preprocessing of the data, the setting of parameters, the acquisition algorithm of the alarm association rule, and the expressing and the explaining of the association rule. The method comprises the steps: integrating, selecting, cleaning and changing communication alarm data; setting an alarm time window and an alarm sliding step length, and converting preprocessed relation type data into conventional type data to be convenient to obtain the alarm association rule; and setting support level and confidence level parameters, calling the acquisition algorithm of the alarm association rule based on a full itemset, obtaining the association rule from the alarm data according to the set parameters, and expressing and explaining the obtained alarm association rule. On the basis of the alarm association rule obtaining method, the alarm association analysis of the mobile internet can be realized without the participation of specialists, operation personnel and maintenance personnel, and the processing efficiency is doubled and redoubled under the condition that the operation cost is lower; and independent of a topological structure of a communication network, the method can be adapted to the complex, variable and isomerous communication network, can be used for automatically discovering the alarm association rule, is particularly suitable for the alarming and the monitoring of the mobile internet, and is wide in application prospect and good in practical value.
Owner:INSPUR TIANYUAN COMM INFORMATION SYST CO LTD

Discrete keyboard layout system and setting method, corresponding portable electronic device and control method

The invention relates to a discrete keyboard layout system used in a touch screen of a portable electronic device. The system comprises a left master keyboard area, a right master keyboard area and an additional function area, wherein the additional function area is arranged between the left master keyboard area and the right master keyboard area. The invention also relates to a method for carrying out keyboard layout switching setting and dynamic zooming on the discrete keyboard layout system, an electronic device system for implementing the discrete keyboard layout system, and a method for implementing the setting control of discrete keyboard layout switching based on the electronic device system. By using the discrete keyboard layout system and setting method, corresponding portable electronic device and control method disclosed by the invention, the keyboard position layout function can be changed flexibly so as to accord with the human engineering, thereby obviously reducing the operating complexity of a user and solving the continuity problem of overall error correction of an area of a keyboard; meanwhile, an interface is friendly, the implementation procedure is simple, the application is flexible and efficient, the performance is stable and reliable, and the application range is wide.
Owner:SHANGHAI CHULE (COOTEK) INFORMATION TECH CO LTD

New method for RAIM (receiver autonomous integrity monitoring) based on satellite selecting algorithm in multimode satellite navigation system

The invention discloses a new method for RAIM (receiver autonomous integrity monitoring) based on a satellite selecting algorithm in a multimode satellite navigation system. The method comprises the steps of first determining space position information of satellites according to a navigation message and eliminating satellites with a small elevation angle according to a shielding angle; determining an observation matrix including only one clock correction item according to clock correction conversion factors in the navigation message; selecting p satellites from N visible satellites so as to be used for positioning calculation of a receiver, acquiring a satellite combination, which enables the GDOP (geometric dilution of precision) to be minimum, through the satellite selecting algorithm to act as calculating satellites, and determining a weight matrix in WLS (weighted least squares) according to parameters such as the carrier-to-noise ratio, the loop bandwidth, pre-check integral time and the like of satellite signals; carrying out RAIM availability detection according to a false alarm rate and a missed alarm rate which are preset by the receiver, and calculating a pseudo-range residual error threshold value after positioning according to the false alarm rate and a degree of freedom in Chi-squared distribution; carrying out global detection at first, then carrying out local monitoring in a circumstance that a fault satellite exists, determining calculation satellites again through satellite selection, and finally carrying out positioning calculation through selecting satellite combinations within the threshold value. The method disclosed by the invention is simple, high in fault recognition rate, not only applicable to multi-mode and multi-fault satellite navigation systems, but also applicable to single-mode and multi-fault satellite navigation systems, thereby providing new ideas for carrying out RAIM by a modern GNSS (global navigation satellite system).
Owner:PEKING UNIV

Smart home gateway and networking method thereof

The invention discloses a smart home gateway and a networking method thereof. The networking method comprises the following steps: a master gateway setting instruction of a client side is received and an own mode of a gateway is set into a master gateway; or, a slave gateway setting instruction of the client side is received and an own mode of the gateway is set into a slave gateway; when the gateway is used as the slave gateway, the gateway configuration information of the slave gateway and the governed equipment information detected by the slave gateway are reported to the master gateway, and a control command from the master gateway to the governed equipment is received and forwarded to the governed equipment; when the gateway is used as the master gateway, the governed equipment information detected by the master gateway is recorded, the slave gateway configuration information and the governed equipment information of the slave gateway, which are reported by the salve gateway, are recorded; the recorded equipment information is displayed to the client side, a control command to the equipment from the client side is received, if the control command is a control command for the governed equipment of the master gateway, the control command is sent to the governed equipment; if the control command is a control command for the governed equipment of the slave gateway, the control command is sent to the governed equipment. According to the invention, the networking scale of a smart home network can be improved, and meanwhile the operation complexity can be reduced.
Owner:SAMSUNG ELECTRONICS CHINA R&D CENT +1

System and method for detecting quality of metal cap based on machine vision

The invention relates to a system and method for detecting the quality of a metal cap based on machine vision, used for detecting the quality defect of the metal cap and rejecting the inferior quality product. The detection system comprises an optical imaging device, an image processing device, a rejecting device and a conveying belt, wherein the optical imaging device comprises a planar array industrial camera, a first optical detection sensor and a light source; the image processing device is used for processing the image; and the rejecting device comprises a control circuit board, a second optical detection sensor, a solenoid valve and an injection tube. The method for detecting the quality of the metal cap based on machine vision comprises the following steps of: acquiring an interested maximum outline scale of a template cap image; establishing a rotational invariance characteristic template matrix for the template cap image; acquiring a round outline of the cap to be detected according to the interested maximum outline scale; calculating the rotational invariance characteristic matrix in the coverage of the round outline of the cap to be detected; and matching the rotational invariance characteristic matrix with the rotational invariance characteristic template matrix, so as to judge whether the cap to be detected is a qualified product or an inferior product.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI

OFDM (orthogonal frequency division multiplexing) system symbol timing synchronization realizing method suitable for low-signal-to-noise-ratio channel environments

The invention discloses an OFDM (orthogonal frequency division multiplexing) system symbol timing synchronization realizing method suitable for low-signal-to-noise-ratio channel environments. The OFDM system symbol timing synchronization realizing method includes: adopting two conjugated OFDM symbols based on frequency domain PN (pseudo-noise sequence) to serve as a training sequence; subjecting symbol positions of the training sequence and a receiving sequence to sliding conjugation correlation at a receiving end, obtaining a timing offset estimation function via summation and modulus computation; for every moment, taking an estimation function of one timing offset section at every moment to solve a weighted average so as to obtain a dynamic threshold for the corresponding moment; comparing the estimation function with the corresponding dynamic threshold to lock a timing position. Due to the facts that only data symbol position information is required, data are not involved in computation and normalization computation for computation results is not required, the OFDM system symbol timing synchronization realizing method has the advantages that complexity is low and performance cannot be affected by size of received signal power. In addition, the OFDM system symbol timing synchronization realizing method is accurate and stable in timing under a low-signal-to-noise-ratio environment, easy to implement and low in computation complexity.
Owner:XIDIAN UNIV

Rapidly converged scene-based non-uniformity correction method

InactiveCN102538973APrevent erroneous updatesBug update avoidanceRadiation pyrometryPhase correlationSteep descent
The invention discloses a rapidly converged scene-based non-uniformity correction method, wherein the aim of non-uniformity correction is achieved by minimizing interframe registration error of two adjacent images. The method mainly comprises the following steps of: initializing gain and offset correction parameters and acquiring an uncorrected original image; acquiring a new uncorrected original image, and carrying out non-uniformity correction on the new uncorrected original image and the previous uncorrected original image by utilizing the current non-uniformity correction parameters; obtaining relative displacement, scene correlation coefficient and interframe registration error of two corrected images by utilizing an original point masking phase correlation method; and updating correction parameters along the negative gradient direction by adopting a steepest descent method. The method disclosed by the invention has the advantages of high correction accuracy, fast convergence speed, no ghost effect and low calculated amount and storage content and is especially applicable to being integrated into an infrared focal plane imaging system, and the effect of improving imaging quality, environmental suitability and time stability of an infrared focal plane array is achieved.
Owner:NANJING UNIV OF SCI & TECH

Trojan horse detection method based on communication behavior clustering

The invention discloses a Trojan horse detection method based on communication behavior clustering, and belongs to the field of information safety. The unknown Trojan horse detection method is excellent in feature extraction performance, proper in clustering algorithm and high in detection efficiency and accuracy in order to resolve the problems that the existing Trojan horse detection technology is low in feature extraction capacity, improper in clustering algorithm selection and the like. According to the technical scheme, the Trojan horse detection method comprises the steps of extracting a network flow data package, recombining a TCP conversation, extracting a Trojan horse reverse connecting feature, an entropy feature, a heart beat feature and the like, building a feature vector of the TCP conversation and carrying out real-time clustering on the feature vector based on a real-time increment clustering algorithm of LSH. According to the difference of communication behavior features of a Trojan horse conversation and normal network communication behaviors, the Trojan horse detection method marks the difference of the communication behavior features of the Trojan horse conversation and the normal network communication behaviors by combining the statistic analysis and the time series analysis technology, guarantees high detection accuracy and a zero false alarm rate, lowers the false alarm rate, and can effectively carry out real-time detection on the abnormal communication behaviors of a Trojan horse.
Owner:STATE GRID CORP OF CHINA +2
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products