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In recent years, SAR is developing to multitemporal, multi-band, high resolution and full polarization. So the study of polarization SAR change detection technology is the trend of the SAR. The traditional change detection methods have disadvantages either low accuracy, serious noise or can't determine changes types. In order to improve the detection accu-racy of polarization SAR data, a new change...
The paper proposes a novel method for automatic linear features extraction from raw LiDAR point clouds. Our method bases on the fact that facades of a building in urban area can reflect laser pulses since most of time the scanning angle of the laser scanner does not equal to zero degree. Experimental results show that our algorithm can extract linear features in urban area automatically with high...
Relationships between sea surface roughness and wind-wave parameters (wave age and wave steepness) are analyzed, which means that sea surface roughness is indeed affected by wind-wave state, however, the appropriate relationship between dimensionless sea surface roughness and wave parameter is still not found. Analysis shows that the spurious self-correlation is found in all of the parameterization...
To reduce the noise in the signal in nonstationary signals, a new technique based on EEMD(Ensemble Empirical Mode Decomposition) was studied for decomposing signal. With the EEMD the extremums of the signal was used as scales to decompose data in the time domain and get the IMFs (Intrinsic Mode Function) with their frequencies from high to low. Then based the frequency spectrum from FT(Fourier Transform)...
In order to transmit live video or video streaming at low bit-rates, the encoder usually needs to reduce the frame rate to cope with the available bandwidth. In this paper, a new dynamic frame-skipping scheme for live video encoding based on motion detection in the adaptive length sliding window is proposed. The length of a sliding window can be adjusted according to bandwidth variation in order to...
This essay deals with VV&A method of operation Command Decision Simulation (CDS) prototype. It provides a summary and conclusion on current prototype V&V methods frequently used in military simulation field, and based on development process of simulation prototype, presents detailed VV&A process of CDS prototype in system prototype.
Radar remote sensing technology has become an important method for stable and long-time rice monitoring for its capability to operate in all weather conditions. In this paper, the obtained main achievements on rice monitoring using ENVISAT ASAR data were reviewed and major results were summarized. The results showed that the multi-temporal and multi-polarization radar data has advantages in rice monitoring,...
This article studies a paper cutting platform in a comprehensive approach to folk art, folklore, communication, computer and information science focusing on paper-cut in Hebei China. The main content includes: 1) the data collecting and recording of the scattered Chinese folk paper-cut work in Hebei, 2) the digitization, optimization, compression, classification, icon and pattern extraction, vectorization...
The paper optimizes AVS key coding algorithm, and designs high coding efficiency and high coding quality AVS encoder XAVS based on x86 platform. It supports IPPP, IBBP structure, films on a variety of formats of media sources to AVS compression, rate control, rate distortion optimization, and packaged into the standard TS stream. The experiment results show that subjective quality of XAVS is better...
The usual thinning algorithms based on analyzing the 8 adjoining points of the present pixel usually result in double pixels in the thinned image.In response to the necessity of detecting holes in the numeral recognition,a modified method is proposed based on the original thinning method,which can delete the unnesessory pixels,thus maintaining the single skeleton of the thinned number.It's proved...
Conventional algorithms for image matching are slow and inefficient, and standard genetic algorithm (SGA) in image matching is not high in accuracy. In order to solve these problems, a fast and variable precision template matching algorithm based on hybrid genetic algorithm is proposed in this article. The algorithm combines GA and hill-climbing algorithm in an efficient way and performs fast both...
Electroencephalogram (EEG) activity in Male human during pleasant and unpleasant emotions by different events was investigated. When the subjects were listening to pleasant music and noise, the EEG data comparing pleasant and unpleasant states were obtained. Related emotional theta band was studied by using Principal Component Analysis of EEG data, meanwhile extracting the first principal component,...
According to the difference of motion characteristics between ship targets and the targets that move stationary, the application of a time-frequency distribution-Reassigned Smoothed Pseudo Wigner-Ville Distribution (RSPWVD) in ISAR imaging spectrum at ship target is studied. The high resolution instantaneous Doppler frequency spectra at a certain time instant is obtained by processing the radar echo...
In this paper, the problems faced by traditional model of petroleum engineering experiment teaching were analyzed, the applicability of multimedia software in experiment teaching was discussed, and the construction and application of petroleum engineering multimedia software were introduced.
Just Noticeable Difference (JND) of interaural level difference (ILD) are measured in 30 subjects with nomal hearing. Single-frequency sine tones with the frequency of 200, 500, 1000, 2000, 5000, 8000 or 12000Hz are used in the subjective listening test. The reference ILDs are 0, 3, 6, 9, 12 and 22dB, indicating 6 directions of sound sources from midline to the direction of the right ear. The results...
Generally speaking, the slowly-happening and short distance transport of hazard materials in the atmosphere can be simulated very well with a dispersion model based on the computer technology. However, when a sudden-happening disaster, such as the Chernobyl disaster, had occurred, all the existed dispersion models in the world didn't work well for it. In this paper, we show the recent progress on...
The Extensible Markup Language for Petroleum Geologic Information Expression (PXML) is a new expression method of petroleum geologic document information, which is of great significance for storing, exchange, sharing and analysis of petroleum geologic information. This paper mainly discussed the definition, features, expression model of text and data information, transformation from regular document...
Taking the case of Shenyang Agriculture University, based on the 3D scene creation process as the reference, this essay elaborates the process and methods of the creation of 3D virtual scene and 3D roaming system in such three aspects as data collection, methods of 3D scene creation, and scene integration. The innovation of this essay is the modeling optimization running through the entire modeling...
This paper presents a polarimetric SAR interferometric SAR data analysis based on ESPRIT algorithm and three-stage inversion algorithm. The formulations of ESPRIT algorithm and three stages inversion algorithm are presented firstly. The experimental results based on ESPRIT algorithm and three-stage algorithm have been compared and analyzed then. And we point out that direct conversion of the retrieved...
The gyro theodolite with suspension-belt (GAK1, JT15) is traditionally and commonly used in mine surveying for the orientation. However, with the rapidly development of underground engineering, the traditional instruments can't meet the constructive needs of the long and large tunnels. Allow for its insufficiency in practical application, this paper discussed the key technology, technical characteristics...
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