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THE RESEARCH ON SPEECH ENHANCEMENT TECHNIQUES
Wang, Chen Fa,Zhao, De Bin,Jin, Shan,Miao, Baili 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
In this paper, the research on the methods of speech enhancement in applications is made. The main methods mentioned here are the improving of input devices of a speech recognition system and the applying of adaptive filtering technique. The paper discusses the paraboloid speech enhancement, the ellipsoid speech enhancement, the two-microphone collecting system for speech and noise, and the one-microphone collating system for voice containing noise.
AN IMAGE CODING SCHEME BASED ON THE CLASSIFICATION
Wei, Wang,Jun, Cai De,Guan, Wan Fa 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
Based on the spectral analysis of the discrete cosine transform (DCT), this paper proposes an adaptive image coding scheme, two activity measurements are designed to classify the image subblocks into four classes, various coding techniques are applied to every class, a good visual quality of the reconstructed image at bit rates of 0.2-0.4 bits/pixel (bpp) is achieved.
Li Shen,Li Rong-Rong,Wang De-Fa,Pan Xiu-Zhen,Guo Hong-Chao 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.5
A Y-shaped eccentrically braced high-strength steel frame is a novel structure. For such structure to exhibit good plastic deformation ability under severe earthquake, the links are made of ordinary steel ( f y ≤ 345 MPa), whereas high-strength steel ( f y ≥ 460 MPa) is used in the frame beam and column to reduce the cross section while ensuring the elasticity of the non-energy consuming component. The new structure has good ductility and energy-dissipating capacity. The response modifi cation factor R is crucial to the performance-based seismic design. For an appropriate and economical seismic design, the R value should be reasonably selected. In the 2016 edition of China's code for Seismic Design of Buildings (GB50011- 2010), it is obviously not reasonable to hide the R concept and adopt a constant value for all structural systems. It is important to study R and C d of a Y-shaped eccentrically braced high-strength steel frame, it can not only improve the structural performance design, but also provide reference for the future, and promotes the application of the structure in seismic areas, which presents excellent seismic performance. Therefore, in this study, structures with diff erent stories (4, 8, 12, and 16 stories) and link lengths (700, 900, and 1100 mm) were designed via the performance-based seismic design method. A static elastic–plastic analysis (Pushover analysis) and an incremental dynamic analysis (IDA) were conducted and the data thus obtained was fi tted to reach the IDA performance curve of the structure. The R and C d value of each prototype were calculated using the capability spectrum method, the number of structural story N and the link length e is considered. The results of the pushover analysis and IDA were compared; the values of each performance coeffi cient obtained can serve as a reference for the performance design of the new structural systems in the future.