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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 16. Отображено 16.
17-04-2013 дата публикации

Cognitive radio frequency spectrum sensing method based on wavelets

Номер: CN103051401A
Автор: Zhao Yu, Liu Yunhuai, Wu Yuanyuan
Принадлежит:

The invention discloses a cognitive radio frequency spectrum sensing method based on wavelets. The method comprises the following steps of (1) after receiving a signal by a receiving antenna, sampling the signal and changing the sampled signal into a digital signal; (2) filtering a band signal that is not needed in the digital signal by a band-pass filter; (3) performing de-noising process for the filtered signal value by a wavelet de-noising technology; and (4) comparing the signal waveform which is subjected to wavelet de-noising with the signal waveform before de-noising, if the amplitude of the signal waveform is not changed, a PU (Primary User) signal exists; if the amplitude of the waveform is greatly changed, no PU signal exists. Compared with the conventional energy detection method, the method provided by the invention is more accurate; compared with the conventional matching filtering method, the method provided by the invention does not need any prior knowledge; and compared ...

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Номер записи: 1
22-01-2014 дата публикации

Vehicle safety belt detection method and device based on image analysis

Номер: CN103522982A
Автор: Chen Jian, Hu Chuanping, Mei Lin, Qi Li, Liu Yunhuai, Wang Wenfei, Shang Yanfeng, Xu Xiaoming, Xu Lei, Tan Yixian, Tang Shijie, Sun Mingxia, Wang Chun, Zheng Xuping, Gao Xin, Yang Hui, Wu Jinjing
Принадлежит:

The invention discloses a vehicle safety belt detection method and device based on image analysis. The vehicle safety belt detection method and device based on image analysis is applied to the image analysis field of intelligent transportation. Firstly, a vehicle widow area is positioned; the position of a safety belt is detected primarily through a line segment detection method; the safety belt is accurately positioned according to the angle and the length of the line segment. The vehicle safety belt detection method and device based on image analysis can store the information of vehicles with passengers not belted up, and provide sufficient, reliable and strict evidences for detection of the traffic offence of not fastening the safety belt.

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Номер записи: 2
25-12-2013 дата публикации

Embedded type vehicle type recognition system based on virtual coil

Номер: CN103473933A
Автор: Hu Chuanping, Qi Li, Mei Lin, Tang Zhiwei, Liu Yunhuai, Jiang Hong, Li Zhenyu, Wang Wenfei
Принадлежит:

The invention discloses an embedded type vehicle type recognition system based on a virtual coil. The embedded type vehicle type recognition system comprises an external program and data memorizer, an external high-speed dynamic memorizer SDRAM, an image collecting device, an image AD sampling module, a power source control module, a dual-core DSP digital signal processor chip, a virtual coil distinguishing unit and a vehicle type recognition unit. The image AD sampling module is used for acquiring the video image date provided by the image collecting device. The dual-core DSP digital signal processor chip is used for calling the virtual coil distinguishing unit to carry out virtual coil distinguishing on the collected video image to select the keyframe image emerging when a vehicle appears. The dual-core DSP digital signal processor chip is used for calling the vehicle type recognition unit to carry out vehicle type recognition calculation on the keyframe image. The embedded type vehicle ...

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Номер записи: 3
22-08-2012 дата публикации

Method for distinguishing wireless transmission multipath in wireless signal strength ranging technology

Номер: CN102647785A
Автор: Zhang Zhen, Liu Yunhuai, Guo Xiaonan, Gao Min, Ni Mingxuan
Принадлежит:

The invention relates to a method for distinguishing a wireless transmission multipath in a wireless signal strength ranging technology. According to the method, the phase information transferred by a signal in different paths is analyzed by utilizing the various adjustability of frequency, namely, different signal strengths are obtained by a receiver under different frequencies. Specifically, the method comprises the following steps: describing each path with a free space transmission model (Friis); solving a signal of a Line-Of-Sight path according to a curve fitting nonlinear optimizing method; and separating the signal from a multipath signal of the receiver. The signal of the Line-Of-Sight path can be directly applied to a positioning operation, and without extra hardware cost, the positioning precision of the wireless signal strength ranging technology in a dynamic multipath environment is greatly increased.

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Номер записи: 4
17-07-2013 дата публикации

Multipath interference elimination method applied to indoor location based on signal strength

Номер: CN103207381A
Автор: Liu Yunhuai, Zhao Yu, Qi Li, Hu Chuanping, Ni Mingxuan
Принадлежит:

The invention discloses a multipath interference elimination method applied to indoor location based on signal strength. According to the method, by establishing a corresponding model through an overlying system in a location system, a solving equation set is established so as to solve a distance from a real transmitting terminal to a receiving terminal in indoor location. Through the method, interference caused by overlying of direct path signals caused by signals of a reflection path in the indoor environment can be overcome, and accuracy in indoor location based on the electromagnetic strength is greatly improved.

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Номер записи: 5
25-12-2013 дата публикации

Front human face detection method based on sensitive area

Номер: CN103473564A
Автор: Hu Chuanping, Yang Hui, Mei Lin, Qi Li, Liu Yunhuai, Zheng Xuping, Tan Yixian, Shang Yanfeng, Wang Wenfei
Принадлежит:

The invention discloses a front human face detection method based on a sensitive area. The method comprises the following steps that a virtual coil is set and the position and the size of the sensitive area are determined; the motion foreground in the sensitive area is detected and tracked through background modeling; the candidate area of the human face is detected through the Adaboost algorithm of Harr-like characteristics; some limitation conditions are set to exclude non-front human face images according to the color characteristics of the human face and simplified shape characteristics. According to the front human face detection method based on the sensitive area, due to the fact that the sensitive area is set and the motion foreground is detected, the efficiency of the follow-up Adaboost detection algorithm is improved, and the detection accuracy is improved through the later skin color and shape verification.

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Номер записи: 6
11-09-2013 дата публикации

Automobile active safety system based on video recognition and vehicle ad-hoc network

Номер: CN103295424A
Автор: Shang Yanfeng, Hu Chuanping, Mei Lin, Liu Yunhuai, Qi Li, Cai Xuan, Wang Jian, Yan Zhiguo, Wang Wenfei, Liu Weihao, Tan Yixian, Shao Jie
Принадлежит:

The invention discloses an automobile active safety system based on video recognition and a vehicle ad-hoc network. The automobile active safety system mainly comprises a video acquisition module, a processing module, a short distance communication module, a master control module and an output module. By installing the modules on an automobile, automobiles in front of or behind the automobile can be connected to form a mobile ad-hoc network so as to transmit automobile positions, plate numbers, speed and other information in the network, and active and safe protection of automobiles can be achieved.

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Номер записи: 7
16-01-2013 дата публикации

Personnel behavior identification implementation system and method based on image segmentation and semantic extraction

Номер: CN102880873A
Автор: Tang Zhiwei, Qi Li, Mei Lin, Liu Yunhuai, Zhu Xuemei, Li Zhenyu, Chen Longhu, Jiang Hong, Wang Bo
Принадлежит:

The invention relates to a personnel behavior identification and detection implementation system and method based on image segmentation and semantic characteristic extraction. The system comprises an image acquisition unit, a personnel behavior detection host computer, a user inquiry unit and an output interface unit. The method comprises the following steps: the personnel behavior detection host computer identifies personnel behaviors in the image data acquired by the image acquisition unit through image segmentation and image semantic characteristic extraction so as to generate personnel behavior presentation information. In the method, the personnel behavior detection host computer maps low-level features of an image into high-level semantics through a support vector machine so as to establish a mapping relation between the image and the image description, so that the content in the picture can be comprehended through digital image processing and analysis, the behaviors of personnel ...

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Номер записи: 8
29-01-2014 дата публикации

Vehicle color recognition method

Номер: CN103544480A
Автор: Hu Chuanping, Gao Xin, Xu Lei, Tan Yixian, Wang Wenfei, Mei Lin, Liu Yunhuai, Qi Li, Zheng Xuping, Wang Chun
Принадлежит:

The invention discloses a vehicle color recognition method and belongs to the field of image processing. The method includes: locating a license plate and recognizing the color of the license plate; determining a vehicle color recognition reference area according to the location and color information of the license plate; dividing vehicles into colored vehicles, black vehicles, white vehicles, sliver vehicles and gray vehicles by counting feature parameters of the reference area, such as saturation; if the vehicle is colored, separating out a colored area, and recognizing the color of the area; if the vehicle is black, white, sliver or gray, splitting the reference area, and determining the color of the vehicle by voting. Through the use of the method, the problem that the prior art is sensitive to interferences in images is solved.

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Номер записи: 9
17-07-2013 дата публикации

Signal intensity based method for eliminating multipath interference and achieving accurate indoor positioning

Номер: CN103209476A
Автор: Liu Yunhuai, Zhao Yu, Qi Li, Hu Chuanping, Ni Mingxuan
Принадлежит:

The invention discloses a signal intensity based method for eliminating multipath interference and achieving accurate indoor positioning. The method comprises the steps of establishing a model for a superimposed system, thus, an equation set is established to solve a distance from a real transmitting terminal to a receiving terminal in indoor positioning. According to the method, indoor positioning is conducted on the basis of energy of the receiving terminal, so that the characteristic that energy-based positioning is low in requirement of hardware is used, and the problem that the energy-based method is inadequate in accuracy is solved.

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Номер записи: 10
25-09-2013 дата публикации

System and method for realizing control over video information encryption on basis of semantic granularity

Номер: CN103327363A
Автор: Li Yi, Hu Chuanping, Mei Lin, Liu Yunhuai
Принадлежит:

The invention relates to a system for realizing control over video information encryption on the basis of semantic granularity. The system comprises a video input interface module, a video structuralization description module, a data mining and semantic matching reasoning module, a real-time encryption calculation module and a video output interface module. The invention further relates to a method utilizing the system for realizing the control over the video information encryption on the basis of the semantic granularity. The system and method for realizing the control over the video information encryption on the basis of the semantic granularity enables the encryption effect of videos to be more approximate to the habits of human sense organs, enables the view authority of the videos to be more controllable, effectively solves the problems that the video content is not targeted in the process of encrypting video data, remarkably reduces the computation complexity, shortens the time delay ...

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Номер записи: 11
29-01-2014 дата публикации

Device and method for locating automobile logo

Номер: CN103544489A
Автор: Hu Chuanping, Sun Mingxia, Mei Lin, Qi Li, Liu Yunhuai, Xu Xiaoming, Xu Lei, Tan Yixian, Shang Yanfeng, Wang Wenfei, Yan Zhiguo, Wang Jian
Принадлежит:

The invention discloses a device and method for locating an automobile logo. The device for locating the automobile logo comprises a video collection module, a license plate locating module, an automobile logo locating module and an output module. An automobile video in a real scene is collected through the video collection module, the initial locating of the automobile logo is carried out according to the position relation between the automobile logo and a license plate, and then the area of the automobile logo is located accurately through a method of edge detection and template matching according to texture information of background images of the initially located area of the automobile logo. The device and method for locating the automobile logo improve efficiency and accuracy for locating the automobile logo, and effectively solve the problems that a large amount of time is consumed, requirements for quality of images are high and robustness is poor in an existing method for locating ...

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Номер записи: 12
09-10-2013 дата публикации

Optimized picture shape feature extraction and structuring description device and method based on horizontal coordinate

Номер: CN103345747A
Автор: Hu Chuanping, Chen Longhu, Mei Lin, Qi Li, Liu Yunhuai
Принадлежит:

The invention discloses an optimized picture shape feature extraction and structuring description device and method based on a horizontal coordinate. According to the scheme, PAL format analog video signals are encoded through a TVP5150 and then are collected by a DM6446 chip, an algorithm processing thread in a codec engine frame is called for achieving processing of video data and extracting of picture shape features, structuring descriptions are conducted on the features, and finally a processed result is uploaded to the Internet through the Ethernet so that users can achieve retrieval. With regard to extraction of the picture shape features, when the structuring descriptions are conducted on the features, first, graying processing is needed, then binarization processing is carried out, edge processing is conducted, afterwards, all positions with effective pixels appearing are recorded into coordinate data, the data are further divided into two lines, one line is used for browsing the ...

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Номер записи: 13
30-01-2013 дата публикации

System and method for carrying out texture feature extraction and structured description on video images

Номер: CN102903126A
Автор: Tang Zhiwei, Liu Yunhuai, Mei Lin, Qi Li, Shen Dongqing, Li Zhenyu, Yang Ming, Jiang Hong, Li Wancai, Chen Longhu, Li Pan, Wang Bo
Принадлежит:

The invention discloses a system and a method for carrying out texture feature extraction and structured description on video images. According to the invention, under the control of a dual-core DSP (digital signal processor) chip, a video image acquisition module carries out real-time acquisition on an image, and after the image is processed through an A/D (analog to digital) sampling module, the image is subjected to segmentation so as to obtain a plurality of sub images; a two-dimensional Gabor wavelet module carries out filtering processing on the sub images, and then through carrying out extraction on the sub images by using a texture feature extraction module, the texture features of the sub images are obtained; a classification and discrimination module carries out features matching with a Brodatz standard texture library according to the extracted texture features; and finally, a structured description module carries out structured description on the texture features and the classification ...

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Номер записи: 14
21-08-2013 дата публикации

Signal-intensity indoor distance measuring method under multipath and other signal noise interference environments

Номер: CN103257335A
Автор: Liu Yunhuai, Zhao Yu, Qi Li, Hu Chuanping
Принадлежит:

The invention discloses a signal-intensity indoor distance measuring method under multipath and other signal noise interference environments. The method comprises the following steps of firstly arranging a distance measuring node, then arranging a target node, sending electromagnetic waves from the target node to the distance measuring node, receiving the electromagnetic waves through the distance measuring node, utilizing signal intensities measured from different channels to establish an electromagnetic wave receiving model at the distance measuring node, finishing a receiving end electromagnetic field overlay model through a built perpendicular incidence path and a plurality of built reflection paths, and utilizing the DFT principle to solve the electromagnetic file overlay model to obtain the perpendicular incidence distance, the reflection coefficients and the reflection distance. The signal-intensity indoor distance measuring method under multipath and other signal noise interference ...

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Номер записи: 15
20-03-2013 дата публикации

Vehicle video characteristic extraction system and vehicle video characteristic extraction method based on video structure description

Номер: CN102982311A
Автор: Hu Chuanping, Mei Lin, Wang Jian, Wang Wenfei, Qi Li, Liu Yunhuai, Wu Yixuan, Yan Zhiguo, Cai Xuan, Liu Weihao, Shang Yanfeng, Cheng Tao, Xu Lei, Sun Mingxia
Принадлежит:

The invention relates to a vehicle video characteristic extraction system and a vehicle video characteristic extraction method based on video structure description and belongs to the technical field of video processing. The system comprises a video streaming coding resolver, a vehicle bottom layer characteristic extractor, a vehicle video standard characteristic extractor, a license plate and vehicle logo divider, a license plate and vehicle logo recognizer and a video task support server. The method comprises the steps of firstly utilizing the video streaming coding resolver, the vehicle bottom layer characteristic extractor, the vehicle video standard characteristic extractor, the license plate and vehicle logo divider and the license plate and vehicle logo recognizer to extract vehicle characteristics in traffic monitoring video, then the video task support server uses a timestamp as a uniform identification to store information output by other modules to achieve information dynamic ...

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Номер записи: 16