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铁道学报 1998年第6期20卷 74-80页

作者：马波裘正定北方交通大学

利用小波变换和多分辨分析对分形的尺度变化性质作了分析，得出了小波变换的平移不变性与分形变换的尺度不变性是一致的的结论；并据此提出了一种采用小波变换和ＩＦＳ分形编码相结合的新的图象编码方法。

关键词：分形 IFS编码小波变换多分辨分析图像编码

Continuous Wavelet Transforms

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Continuous Wavelet Transforms

第七届国际信号处理会议

作者： SHI Yunhui RUAN Qiuqi (College of Computer science beijing university of technology Beijng china 100022) (institute of Information science beijing jiaotong university Beijng china 100044)

In this paper, we propose a new type of continuous wavelet transform. However we discretize variables of integral a and b , any numerical integral has a high resolution, and a does not appear in th

关键词： Fourier transform wavelet frame wavelet transform neural network

来源： cnki会议评论

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基于PSOLA算法的情感语音合成

系统仿真学报 2008年第S1期20卷 423-426页

作者：任蕊苗振江北京交通大学计算机学院信息科学研究所北京100044

在人机通信技术由图形用户界面向多通道界面的发展趋势中,语音交互界面的研究开发显示出了巨大的潜力和光明的前景。情感信息作为语音信号的重要组成部分,是人机通信技术智能化的重要标志之一。为此,介绍了一种汉语普通话情感语音合成方... 详细信息

在人机通信技术由图形用户界面向多通道界面的发展趋势中,语音交互界面的研究开发显示出了巨大的潜力和光明的前景。情感信息作为语音信号的重要组成部分,是人机通信技术智能化的重要标志之一。为此,介绍了一种汉语普通话情感语音合成方法,包括语音库的建立及参数提取,应用一种改进的自相关算法进行基音的检测,通过对四种情感语调的基频曲线分析,用PSOLA基音同步叠加算法改变句子的语气,表达出不同的情感,增加了语音交互的自然度,以增添语音和合成系统的智能化,提高了人机交互的能力。

关键词：情感语音基频自相关 PSOLA算法

RESEARCH ON THE MODEL OF SPEECH RECOGNITION AND UNDERSTANDING BY USING HIERARCHICAL INFORMATION FEEDBACK

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Journal of Electronics(china) 1999年第3期16卷 208-214页

作者： Jiang Minghu Lin Biqin Yuan Baozong(institute of Information science, Northern jiaotong university, beijing 100044)

In this paper according to the process of cognitive of human being to speech is put forward a model of speech recognition and understanding in a noisy environment. For speech recognition, two level modular Extended Associative Memory Neural Networks (EAMNN) are adopted. The learning speed is 9 times faster than that of the conventional BP net. It has high self-adaptability, robustness, fault toleration and associative memory ability to the noisy speech signals. To speech understanding, the structure of hierarchical analysis and examining faults which is a combination of statistic inference and syntactic rules is adopted, to pick up the candidates of the speech recognition and to predict the next word by the statistic inference base; and the syntactic rule base reduces effectively the recognition errors and candidates of acoustic level; then by comparing and rectifying errors through information feedback and guiding the succeeding speech process, the recognition of the sentence is realized.

关键词： Neural network Speech recognition and understanding Information feedback

A Practical Qualitative+Quantitative Method─S-ANN

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Systems science and Systems Engineering 2002年第1期11卷 19-27页

作者： GUAN Wei, SHEN Jin-sheng, LI Peng-fei institute of Systems Engineering, Northern jiaotong university, beijing 100044, china institute of Systems Engineering Northern Jiaotong University Beijing 100044 China

In this paper, a practical qualitative+quantitative method named S-ANN is proposed as a forecasting tool, in which the artificial neural network (ANN) of AI is used to handle the quantitative knowledge and the SCENARIO method of systems engineering is used to handle the qualitative knowledge respectively. As a case study, S-ANN method is employed to forecast the ridership of beijing public transportation, the results show that S-ANN method possesses advantages of feasibility and easily to operate.

关键词： SCENARIO method artificial neural network complexity research

TFEL of Ce^(3+) in zine sulpho-oxide

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Chinese science Bulletin 1998年第14期43卷 1179-1183页

作者： YU Lei\+1, LOU Zhidong\+1, XU Chunxiang\+1, XU Zheng\+2 and XU Xurong\+2 1. institute of Material Physics, Tianjin institute of technology, Tianjin 300191, china 2. Department of Physics, Northern jiaotong university, beijing 100044, china institute of Material Physics Tianjin Institute of Technology Tianjin China Department of Physics Northern Jiaotong University Beijing China

A new TFEL material ZnS X O 1-X : Ce 3+ is prepared. The EL brightness of ZnS X O 1-X : Ce 3+ is at least one order higher than that of ZnS: Ce 3+ at the same doping concentration of Ce 3+ . The EL emission wavelength of ZnS X O 1-X : Ce 3+ (\%X\%=0.5) ranges from 400 to 600 nm. The emission of ZnS X O 1-X : Ce 3+ may be used as the blue part of white TFEL.

关键词： thin_film electroluminescence (TFEL) filter layered optimization zine sulpho_oxide.

Central simple Poisson algebras

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science china Mathematics 2004年第2期47卷 245-263页

作者： SU Yucai & XU XiaopingDepartment of Mathematics, Shanghai jiaotong university, Shanghai 200030, china institute of Mathematics, Academy of Mathematics and System sciences, Chinese Academy of sciences, beijing 100080, china 1.Department of Mathematics Shanghai Jiaotong University 200030 Shanghai China 2.Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences 100080 Beijing China

Poisson algebras are fundamental algebraic structures in physics and symplectic geometry. However, the structure theory of Poisson algebras has not been well developed. In this paper, we determine the structure of the central simple Poisson algebras related to locally finite derivations, over an algebraically closed field of characteristic *** Lie algebra structures of these Poisson algebras are in general not finitely-graded.

关键词： Poisson algebra, locally-finite operator, derivation, finitely-graded, isomorphism class.

Determination of the packing number Dλ(3,W4（3）,v)

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science china Mathematics 2009年第11期 2537-2548页

作者： WU Yan & CHANG YanXun institute of Mathematics,beijing jiaotong university,beijing 100044,china

A t-hyperwheel(t≥3) of length l(or W l(t) for brevity) is a t-uniform hypergraph(V,E) ,where E = {e1,e2,. . .,el} and v1,v2,. . .,vl are distinct vertices of V = il=1 ei such that for i = 1,. . .,l,vi,vi+1 ∈ ei and ei ∩ ej = P,j ∈/{i-1,i,i + 1},where the operation on the subscripts is modulo l and P is a vertex of V which is different from vi,1 i l. In this paper,we investigate the maximum packing problem of MPλ(3,W 4( 3) ,v) . Finally,the packing number Dλ(3,W 4( 3) ,v) is determined for any positive integers v 5 and λ.

关键词： t-(v Γ λ) packing leave packing number group divisible(Γ t) -design candelabra(Γ t) -system

Acetazolamide inhibits aquaporin-1 protein expression and angiogenesis

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Acta Pharmacologica Sinica 2004年第6期25卷 110-114页

作者： Yang XIANG2, Bing MA, Tao LI, Jun-wei GAO, He-ming YU3, Xue-jun LI4 Departmentof Pharmacology, school of Basic Medical sciences, Peking university, beijing 100083 2Life science institute, Nanjing university, Nanjing 210093 3National Research institute for Family Planning, beijing 100081,china Department of Pharmacology School of Basic Medical Sciences Peking University Beijing 100083 China

AIM: To study effects of acetazolamide on aquaporin-1 (AQP1) protein expression and angiogenesis. METHODS: Establishing Lewis-lung-carcinoma model, the localization of AQP1 in tumor tissues was investigated by immuno- histochemical methods; The biological activity of acetazolamide was detected by endothelial cells proliferation test (MTT) assay and chorioallantoic membrane (CAM) vascular inhibition test. RESULTS: Immunohistochemical localization of AQP1in mice tumor was labeled in capillaries, post capillary venules endothelial cells. After being treated with acetazolamide, the number of capillaries and post capillary venules was significantly decreased in tumor tissue. Acetazolamide showed significant inhibitory effect on angiogenesis in CAMand endothelial cell proliferation. CONCLUSION: Acetazolamide might be identified and developed as one of potential lead compounds for a new therapeutic intervention in inhibiting cancer angiogenesis.

关键词： neoplasms acetazolamide angiogenesis inhibitors CHIP28

A Note on the Nonparametric Least-squares Test for Checking a Polynomial Relationship

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Acta Mathematicae Applicatae Sinica 2003年第3期19卷 511-520页

作者： Chang-lin Mei, Shu-yuan He, Yan-hua WangLMAM, institute of Mathematics, Peking university, beijing 100871, china school of sciences, Xi’an jiaotong university, Xi’an 710049, china LMAM Institute of Mathematics Peking University Beijing 100871 China school of sciences Xi’an Jiaotong University Xi’an 710049 China

Recently, Gijbels and Rousson[6] suggested a new approach, called nonparametric least-squares test, to check polynomial regression relationships. Although this test procedure is not only simple but also powerful in most cases, there are several other parameters to be chosen in addition to the kernel and bandwidth. As shown in their paper, choice of these parameters is crucial but sometimes intractable. We propose in this paper a new statistic which is based on sample variance of the locally estimated pth derivative of the regression function at each design point. The resulting test is still simple but includes no extra parameters to be determined besides the kernel and bandwidth that are necessary for nonparametric smoothing techniques. Comparison by simulations demonstrates that our test performs as well as or even better than Gijbels and Rousson’s approach. Furthermore, a real-life data set is analyzed by our method and the results obtained are satisfactory.

关键词： Local polynomial fitting polynomial regression derivative estimation p-value