Table of Content

20 September 2000, Volume 36 Issue 5

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Some Results on MLE of the Parameter of the Exponential Distribution from Randomly Censored Data

WANG Qihua

2000, 36(5):  583-590. 

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Consider the exponential population... where θ>0 is an unknown parameter. In this paper the MLE of θ, say from randomly censored data is proved to be asymptomic minimax efficiency. That is, for a certain loss function w(.), and I(θ) is the information function of the censored observations. Furthermore, the iterative logarithm law and an inequality for the rth(r≥2) mean error of are also established, respectively.

Limit of Perturbed Discontinuous Dynamical System

ZHANG Zhixiang

2000, 36(5):  590-598. 

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The author uses comparison theorem for stochastic differential equations to explore the limit behavior of one-dimentional discontinuous dynamical system with small random perturbations.

Automatic Segmentation of Moving Objects for Head-shoulder Video Sequence

LUO Tao

2000, 36(5):  599-607. 

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Introducing and comparing the difference within the conception of area segmentation, motion segmentation and moving object segmentation (VOP extraction), and their application in content-based video sequence image coding. Analysis the relationship between the frame difference image and its relative frame gray level image. Then a new automatic moving object edge tracking and extracting method, based on the high correlation between the edge of frame difference and the edge of gray level image,was proposed. Using the close of moving object edge to get the real moving object.

q-Zero-covariance Portfolio Frontier

WANG Yiming

2000, 36(5):  608-612. 

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Unlike the literature.this paper mainly discusses the characteristics of the portfolio which isn't on the portfolio frontier. A more general concept—q-zero-covariance portfolio frontier is proposed, and its geometric configuration is depicted in the σ₂(r)—E［r］ space. The usual zero covariance portfolio of the frontier portfolio is its degenerate case, and the portfolio frontier is the envelope of our q-zero-covariance portfolio frontier as q moves.

Optimum BMS Designs with Dependent Risks

LIU ChangBiao,YUAN Wei

2000, 36(5):  613-618. 

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The bivariate Poisson models of contingent claim times about the homogeneous portfolios are studied, and an independent condition of the two variables is proved, and then the Mixed bivariate Poisson models of contingent claim times about the heterogeneous portfolios with dependent risks are studied, and the last, the optimum BMS formula about the heterogeneous portfolios with dependent risks are reached.

A New Definition of Fuzzy Partition and Its Application

YU Jian,CHENG Qiansheng

2000, 36(5):  619-623. 

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In this paper, we pointed out that the Ruspini's definition of fuzzy partition has a shortcoming, which does not always coincide with our intuition. So we proposed a new definition for fuzzy partition and proved the new definition of fuzzy partition has a desired property consistent with our intuition and applications of fuzzy partition (e.g., fuzzy decision making, fuzzy clustering, fuzzy control, etc.). It can follow Ruspini's definition of fuzzy partition, which are cited frequently in current papers. According to the new definition of fuzzy partition, we defined the relative clearness of fuzzy sets and the mean clearness of fuzzy partition. The latter is proved effective for evaluating the performance of FCM algorithm by the experiments.

Robust Analysis and Synthesis of MIMO Linear Systems Subject to Simultaneous Perturbations

DUAN Zhisheng,HUANG Lin,WANG Long

2000, 36(5):  624-633. 

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Robust control problems of MIMO linear systems with both plant and controller subject to additive norm-bounded perturbations are studied, and LMI-based controller design method is given. The relation between the conditions of robust analysis and robust synthesis is also given. In addition, robust performance problem is considered again, a better sufficient condition is presented.

Room Temperature Transmission Spectrum in Metal Ion Doped TiO₂ Nanoclusters

LIANG Ruisheng,WANG Dehuang,CHENG Humin,WANG Yanqin,MA Jiming

2000, 36(5):  634-636. 

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The experimental results on transmission spectrum in metal ion doped TiO₂ nanoclusters at room temperature are reported. It is found that the transmission in the metal ion doped TiO₂ nanoclusters are decreased significantly. The transmission change as increasing wavelength nonlinearly varied and there is a maximum in the transmission change curve in metal ion doped TiO₂ nanoclusters.

Signal Detection of Global Climate Change and External Forcing Factors

HOU Zhangshuan,LI Xiaodong

2000, 36(5):  641-650. 

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The application of the B-spline wavelet analysis method to series of climate and external forcing factors is introduced. Using lag-correlation analysis method, interpretative variances analysis method, phrase comparing method to the wavelet analysis result, we not only gained the variation at different scales of the global temperature and El Nino signals, the location of the jump points and latent scale of these series, but also indicated the magnitude, extent of the effect of external forcing factors on them.

Noisy Chinese Speech Recognition Based on Linear Prediction of One-sided Autocorrelation Sequence

HUANG Xinyu,WU Shuzhen

2000, 36(5):  672-680. 

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A new way is supplied to increase the recognition rate of Chinese speech in noise. It includes two parts. One is using the autocorrelation function to detect the speech terminal, the other is using the coefficients based on the one-sided autocorrelation sequence to replace the original speech signal and then extract the speech feature to recognize. Isolated word recognition experiment based on DTW shows: it can reduce the disturbance of noise effectively and get the high recognition rate. It is of great advantage to apply when SNR (signal to noise rate) is low.

Mapping of the Hulthén Potential intoPoschl-Teller Ⅰ Potential under Point Canonical Transformation

QIAN Shangwu,GU Zhiyu,HUANG Bowen

2000, 36(5):  637-640. 

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By the method of mapping of shape invariant potentials under point canonical transformations, the bound state spectra and eigenfunctions of the Hulthén potential from the known results of Poschl-Teller Ⅰ potential were found.

Route Modeling of Optical Transport Network(OTN) Nodes

TAO Zhenning,WU Deming,XU Anshi

2000, 36(5):  681-688. 

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It is introduced that the concept of OTN node route model. It is also discussed that on the requirements of the OTN node route model and why we define this concept. The matrix and graph forms of the model are demonstrated. The two forms are compared with each other. At last, it is given that several examples and explain how to find the matrix and graph forms through these examples.

Application Research of Nonlinear Programming on the Feedback Analysis of Seepage in Fractured Rock Mass

HUANG Yuanzhi,WANG Enzhi,SUN Yi,DENG Xudong

2000, 36(5):  689-696. 

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The principles and methods of Nonlinear Programming are applied in this paper to find a kind of nonlinear feedback analysis method of seepage in fractured rock mass. On the basic of theoretical analysis and test performed with the experimental model, a series of significant conclusions concerning the feasibility and calculating efficiency of the method are summarized, Meanwhile, a kind of improved arithmetic method is worked out.

Forming Conditions and Mechanism for the Fluid Ore-forming System of the Copper, Gold Deposits in the Middle and Lower Reaches of the Yangtze River Area

ZHOU Taofa,YUE Shucang

2000, 36(5):  697-707. 

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There are two series of Cu, Au deposits,the stratiformed deposits and the intrusive-related ones in the mineralization belt of the middle and lower reaches of the Yangtze River area. Comparative studies on forming geodynamic backgrounds, geological and geochemical conditions of the ore-forming systems have been undertaken in this paper. The stratiformed deposits were formed in Hercynian period by submarine exhalation-sedimentation (SEDEX) of hot brine through the synchronous basement faults in a tensional environmental, and the intrusive-related deposits were formed in Yenshanian in a tensional or a transitional period to tensional environment during the upper mantle doming by water-rock interaction and complex transport-chemical reaction dynamic processes, the ore-forming fluids were mainly magmatic water from melt-fluid partition and some meteoric water.

The Discovery and Its Significance of Late Quaternary Involution in the Area of Lower Reach of Qingshuihe River, Ningxia, China

ZHANG Ke,LIU Kaiyu,YANG Jingchun

2000, 36(5):  714-718. 

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In the lake-face strata located in the lower reach of the Qingshuihe River, Ningxia with the latitude of 37.4° N and the elevation about 1230m, involution dated in late period of late Quaternary was discovered, which indicates that the south limit of permafrost had once expanded approximately to the latitude of 37.4° N in that time in Ningxia and that the annual mean temperature was 8～9℃ lower than today. Because the intensive tectonic uplift in the northeast margin of Tibetan Plateau and cold and dry weather in the last glacial maximum, the Qingshuihe River was so blocked that along the margin of the blocked-lake the involution was developed.

Thermal Mineral Waters in Tianjin

ZHAO Weiming,LIAO Zhijie,SHAO Hongxiang,ZHAO Fengsan

2000, 36(5):  708-713. 

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Tianjin is located at north part of northern China plain, where is rich in thermal water in sedimentary basin. The main reservoir is carbonate rocks of the Paleozoic and upper and middle Proterozoic group, which contain thermal waters with temperature of more than 90℃. The cap rock is Cenozoic sedimentary rocks with thickness of more than 1000m, which contains thermal water with temperature from 25 to 70℃ in 13 sandstone layers. The temperature of thermal water is steady growth along with the deepen of basin. All thermal waters in different aquifers are medical mineral waters, which is conducive to good health.

The Effects of Personality and Social Psychological Factors on Health of Senior

HOU Yubo

2000, 36(5):  719-724. 

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Many factors can affect physiopsychological changes of aging, in which personality and social psychological factors are most important ones. Three models will be used to explain the relationship between personality and physical disease, and a serial of studies confirms of this. Hostility、emotional suppression and neuroticism all have close linkages to cancer and heart disease. By ways of socio-economic status、social support and behavioral style, social psychological factors cast influence on health of senior too. All those factors were integrated by an ecological approach. Those analyses are important to further aging researches.

A Comparative Study of Murine Immune Tissue Involution of Different Age, Sex and Strain by Signaled Shock

XIAO Jian,ZHANG Yan,GENG Xiaofeng,WU Zhenyu,WANG Leyu

2000, 36(5):  725-731. 

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The Present experiments have studied the influences of signaled shock on lymphoid tissue in mice, Male and female Swiss and Balb/c mice of various ages were stressed by signaled shock for 7 days (24 min per session). The animals were then killed for determination of total body weight and the weights of the thymus, spleen and axillary lymph nodes. In addition, the total number of cells in the thymus and the proportion of lymphoid cells in the bone marrow cell population was defined. The results show that stress-induced involution of the thymus was generally more pronounced in older animals, while for the spleen was the opposite. Involution of the thymus was higher in males than in females, but there were no-marked differences between the sexes in the response of the spleen. In general Swiss mice was more sensitive to stress than Balb/c mice. However, for the involution induced by stress on lymph nodes there were not a clear trend with age, sex or strain. In male and female mice of all ages and both strains, stress led to statistically significant reductions in the absolute of cells inside the thymus and spleen and in the proportion of lymphoid cells in the bone marrow.

Theory of Mind—A Broad and Challenging Research Field

WANG Qian,SU Yanjie,LIU Lihui

2000, 36(5):  733-738. 

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This article reviews a great number of researches on “theory of mind” during the past twenty years；summarizes the results of studies concerning different aspects of the topic；and discusses the problems and prospects in this research field.

Theory of Mind—A Broad and Challenging Research Field

WANG Qian,SU Yanjie,LIU Lihui

2000, 36(5):  733-738. 

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This article reviews a great number of researches on “theory of mind” during the past twenty years；summarizes the results of studies concerning different aspects of the topic；and discusses the problems and prospects in this research field.

Numerical Simulation and Visulization Study of Heavy Rainfall in Hubei Province in 1998

CHEN Min,WANG Hongqing,ZHENG Yongguang,LI Yaping

2000, 36(5):  651-658. 

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Using the Pennsylvania State University/NCAR mesoscale model (MM5), a 36h simulation of the heavy rainfall process in Hubei province on July 20, 1998 is conducted. The simulation reproduced the evolution of meso-β-scale convective systems which were responsible for the heavy rainfall quite well. And the MCSs' visual images produced by the visualization software LiveView can reveal the life cycle, the features of water materials' distribution and 3-d stream structure of MCS.

Relational Knowledge Representation Model in Intelligent Tutor System

WANG Lu,WANG Meihua

2000, 36(5):  659-664. 

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The knowledge representation is a key aspect in the computer Intelligent Tutor System(ITS), which determines the effect of the inference process. Moreover, it is necessity of the combination of the knowledge base with the teaching material base in ITS because it contains a lot of multimedia data. In this paper, a discussion of construction of the knowledge base by the relational model(RM) is presented. We analyze the knowledge into groups, each one called a knowledge point. Then, use RM to organize the knowledge points to form two databases；one is called the attribute database, and the other called linkage database. The attribute database gives each knowledge point attributes and a link to the teaching material base, while the linkage database describes the relation among knowledge points. This linkage database is suitable for ratiocination. In order to build the systematic teaching courses, we construct a strategy database. As an example, we discuss the knowledge representation of the cone section in the mechanical drawing class.

A Study on Noisy Speech Recognition (Linear Predictive Coding Prediction Error)

FENG Chenglin,WU Shuzhen

2000, 36(5):  665-671. 

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This paper presents a new method for speech recognition in stationary noise. By using the LPC coefficients of noise to predict all the speech signal, the method gets the LPC prediction error(LPCPE) sequence. Then use it to substitute the speech sequence to detect the speech terminal、extract the speech features and to recognize in a suitable way. Isolated words recognition experiment based on DTW shows: this method is o.k. in automatic detection of speech terminal and extraction of speech feature；and achieves very satisfying recognition rate.