Showing papers in "Journal of Sichuan Normal University in 2002"

Collectively Fixed Points and Equilibria of Generalized Games with U - Majorized Correspondences in Locally G -Convex Uniform Spaces

Abstract: In this paper, by using a collectively fixed point theorem due to author, some equilibrium existence theorems for qualitative games and generalized games with an infinite number of agents, with noncompact strategy spaces and with U-majorized correspondences are proved in locally G -convex uniform spaces. These theorems improve some known results in the literatures.

Asymptotics of Global Solutions for Semilinear Wave Equations in Two Space Dimensions

Abstract: In this paper the asymptotic theory of global solutions of initial value problems for semilinear wave equations in two space dimensionsu tt -△u=ef(u,e), t0, x∈R 2, u(0,x,e)=u 0(x,e), x∈R 2, u t(0,x,e)=u 1(x,e), x∈R 2.is studied. The well posedness and validity of formal approximations about time T=∞ are discussed in the classical space of C 2. Then the validity of formal global solutions is described by utilizing these results. An application of the asymptotic theory is given and a special wave equation in two space dimensions is analyzed.

Chinese Red Beds and Developing Landforms

Abstract: Chinese Red Beds distribute widely in the Southwest , Northwest , Southeast , and Mid China regions. Red Beds are red terrestricol clastic rock deposition which mainly formed in inland basins or lakes during the hot and arid climates of Triassic Period, Jurassic Period, Cretaceous Period and Early Tertiary Period. Red Beds are composed of red conglomerate rock , sand conglomerate rock and sandstone, and contain siltstone, mudstone, shale or gypsum and rick salt double layers. When the basins and ancient lakes rose up, Red Beds could develop many different landforms suck as hillsides, flat mountaintops and Danxia landform for the difference of lithological characters, tectonic effects, weathering surroundings and so on. The Red Beds landforms should be distinguished with Danxia landform rigidly.

Market Analysis of Chinese Tourist E-Business

Abstract: Network management is an inner demand of tourist development and tourist e business is to develop rapidly. Presently there exist problems in Chinese tourist e business market of excesssive dependence on capital operation, payment means and consuming habits, and it has difficulty to develop. It should care more about 18 40 age groups and individual tourists, besides the existing market room in enterprises and organizations.

Improvement of the Quick Fitting of LADT

Abstract: An improved electrocardiogram(ECG) data compression algorithm based on the quick fitting of LADT is proposed in this paper We propose approximating ECG by radius. We apply it to compression of ECG data. Experiments on selected records from the MIT BIH arrhythmia database revealed that the improved algorithm is significantly more efficient in compression and in computatio than the quick fitting of LADT. The improved algorithm can satisfy the demand of real time application.

Modules over R and R{X}

Abstract: In this paper, we show that every w-projective w-module is reflexive, moreover, every finite type w-module over a PVMD is reflexive We also prove that a coherent domain with finite weak dimension is a PVMD in which every prime w-ideal is flat Further, we obtain two representations of w-operation:if R is an SM domain, then R{X} is noetherian, and if F is w-projective as an R-module, then F{X} is projective as an R{X}-module

Study on Cultivated Land Reduction in the Course of Nanjing's Urbanizations with Gray Theory

Abstract: This paper discusses some social factors which influence cultivated land quantity and predicts the area of cultivated land in the future in Nanjing. It researches the cultivated land quantity change in the process of Nanjing urbanizations in last decade by using Gray correlation analysis and Gray predictable way. From this discussion we find that the population of the suburbs is the most important factors to cultivated land quantity change among all factors and the nonagricultural population is the secondary. This discussion can provide some guidances for city planning and cultivated land sustainable developing in Nanjing.

A 3-D Reconstruction Method for Car-body Surface in Binocular

Abstract: On the basis of the photoes captured by CCD from different view points, through the spatial geometry relationship, the expression of the object's tree-dimensional surface has been successfully constructed. In order to reduce time for 3-D reconstruction (3DRS), we develop an adaptive algorithm (3DRRM) for 3DRS. 3DRRM makes full use of the multi-resolution specialty reconstructs the 3-D surface at different resolution. The application implies that under ordinary conditions, this method can reduce much time for 3DRS.

The Isolation and Characterization about Bacillus thuringiensis

Abstract: This article describes a method of isolating Bacillus thuringiensis in soil and characterizing it Bacillus thuringiensis is isolated from selective medium Its physiologic and biochemical analysis proves that it is a Bacillus thuringiensis We use improved medium to culture parasporal crystalline bodies and show that this medium can produce a lot of parasporal crystal in 48 h

Study of Heart Chamber Segmentation and Algorithm Analysis of Ultrasound Heart Images Based on Snake Model

Abstract: Based on a new snake model as well as considering the high noise of ultrasound heart image, suitable filters and edge operators are selected and developed, so that a segmentation algorithm is proposed to segment heart chambers (ventricle or atria), which has great importance for the precision of quantitative analysis.

An Unexploited Scenic Spot of Jiuzaigou Circular Tour Area --The Tourism Resources of Ecology and Qiang Nationality Culture and Its Development in Yanmengou Area, Wenchuan County

Abstract: It is important project for ecotourism to make coordination between developing tourism economy and safeguarding ecological environment, to develop and utilize comprehensively regional tour resources, and to promote urbanization. Mountain area is rich in tourism resources but scattered. We need to combine those dispersed scenic spots, depend on the characters of ecological property and minority amorous feelings, into a rational net of region tourism or line. This paper discussed the development of new tourism resources of Yanmengou area that will be helpful for tourism of the Jiuzhaigou circular tour area.

Fuzzy Minimal Automaton and Reduced Fuzzy Automaton

Abstract: In this paper the notions of fuzzy minimal automaton and reduced fuzzy automaton are introduced, the relationship among fuzzy minimal automaton, rational fuzzy language and reduced fuzzy automaton are discussed, several important results are obtained.

Analysis on a Species Mechanics Epidemical Model with Nonlinear Incidence Rate

Abstract: In this paper, a species mechanics epidemical model with nonlinear incidence rate was considered. The sufficient conditions on the global asymptotic stability of the extinct equilibrium and the survival equilibrium are obtained. The results show that control the increase of population is propitious to preventing and controling the epidemic of a contagious disease.

Studies on the Dielectric and Magnetic Properties of Ferrocene Type Polymeric Magnet Modified by Acrylic Acid

Abstract: In this paper, we have reported the ferrocene type polymeric magnet modified by acrylic acid, the relation between frequency magnetic conductivity magnetic loss (f μ′ μ″) and frequency dielectric constant dielectric loss (f e′ e″) of the modified polymeric magnet which has been studied at high frequency and microwave band. Results show that it has higher dielectric constant (e′) , lower dielectric loss ( e ″) and magnetic loss ( μ ″). It is very important for small volume of devices.

A New Generalization of the Popoviciu's Inequality

Abstract: An inequality for the concave function is established by using Schur's concavity of the elementary symmetric functions and a simple domination relation of the vector. As a consequence Popoviciu inequality is extended in many sides.

Frequently-used Prediction Method and Evaluation Summary

Abstract: We can evaluate prediction method by means of fuzzy-summerized-evaluation. It benefits to our selection of prediction methods.

Investigation and Study of Psychological Health of Elementary School Teachers

Abstract: A positivistic study of self assessiment of psychological health by 230 elementary school teachers reveals that, in the SCL 90 form such factors as physicalization, compulsion, anxiety, hostility and fear mark obviously higher than domestic normal, there exists notable difference between teachers in charge of a class and the other teachers in anxiety, hostility and fear, and teachers of old, middle aged and young generation show remarkable difference in physicalization, compulsion, fear and ofther factors.

Business Operation System Reform and Its Problems of Sichuan Scenic Resorts

Abstract: With typical "Bifengxia Model" and "Siguliangshan Phenomenon", Sichuan takes the lead in business operation management system reform of scenic resorts. The separation of operation right and ownership brings about chances for resort development, but at the same time gives rise to new problems such as interest division, management, cultural concordance and resource wastage.

Regularity of the Attractor and Approximate Inertial Manifold for Strongly Damped Nonlinear Wave Equations

Abstract: In this paper, the initial boundary value problem of the strongly damped nonlinear wave equation u tt =αu xxt +σ(u x) x-f(u)+g(x) is considered. By using the analylic property of the semigroup generated by the principal operator of the equation in the phase space, the authors prove the smoothing property of the solution, the regularity of the attractor is obtained and approximate inertial manifolds of the equation are constructed. It is proved that arbitrary trajectory of such equation goes into a small neighbourhood of such manifold after large time.

The Rough Fuzzy Number

Abstract: Rough sets theory and fuzzy sets theory research the unperfect problems in information systems. On the base of fuzzy number and rough sets, this paper defines the rough fuzzy number (RF number). Then it researchs the nature of RF number and discusses the distance between two RF numbers.

The Research of Plot-Based Knowledge Expression in Hiberarchy Style in Intelligent Education Platform of Physics

Abstract: The necessity of plot-based knowledge expression in the building of intelligent education platform of physics is discussed. The main shortages of current computer aided education systems in physics are pointed out. And then, an expression method which is based on the idea of decomposition and combination and the structure characteristics of subject fields is presented, that is the plot-based knowledge expression in hiberarchy style. Its motive is to unify both the physics' issue solution and experiment imitation expression into a unified form of plot-based knowledge element. The investigation indicate that this kind of expression system is applicable, frank, in focus and naturalness.

Global Attactor for Cahn-Hilliard Equations with More General Nonlinear Term

Abstract: In this paper, the existence of compact and connected global attractor for the Cahn Hilliard equationsut-△k(u)=0, k(u)=-λ△u+f(u), un=-△un=0, u(x,0)=u 0(x)is transformed. The condition that f(u) is a polynomial of odd degree with a positive leadin coefficient is replaced by move general limited one. It is proved that such system possesses a compact and connected global attractor.

Si Shu and Xue Tang: Dualistic Educational Structure at the beginning of the 20th Century

Abstract: There exists a dualistic structure of the old and the new in modern China's education system in the course of social change, which is obvious in the elementary education for Xue Tang and Si Shu are representative in the new and the old systems respectively. at the Beginning of the 20th Century, Xue Tang cannot replace Si Shu, which is still in large proportion, althongh the replacement is the genereal trend. Because of the adaptability of Si Shu and the immaturity of Xue Tang, there exist between the two conflict and competition, and complementarity and inheritance as well. It reflects to a large extent the features of China's education modernization, and indirectly the social environment of the time.

Research and Preparation of a Reversible Thermo-color Printing Ink at Lower Temperature

Abstract: Based on the predecessors, a novel formula of a reversible changing color printing ink at lower temperature is put forward in this paper, with CoCl 2·2C 6H 12 N 4·10H 2O as pigment, alkyd resin as binder, nanometre SiO 2 as filler. This printing ink can change color at lower temperatures, reverse color in a short time, and may be used many times.

The Closeness of Fuzzy Rough Sets

Abstract: In this paper, base on the definition of closeness in fuzzy set theory and some properties of fuzzy rough sets, the closeness of fuzzy rough sets is discussed. The closeness of distance, the least and the greatest closeness, the least average closeness and the closeness in the lattice for fuzzy rough sets are introduced. At the same time, we discuss their properties.

Coincidence Theorems Involving Better Admissible Mappings and Φ-Mappings in G-Convex Spaces

Abstract: A new coincidence theorem involving better admissible mappings and Φ-mappings is proved in noncompact G-convex spaces. As consequences, some recent coincidence theorems and fixed point theorems are obtained under much weaker assumptions.

The New Exact Solutions of (3+1)-dimensions Nonlinear Equations

Abstract: In this paper, the new exact solutions of (3+1) dimensional nonlinear equations are studied. According to Painleve singularity analysis method and the homogeneous balance method, one can find a nonlinear transformation to change the (3+1) dimensional nonlinear equations. Starting some special types of the soliton solutions for the (3+1) dimensional nonlinear equation are obtained by introducing a class of the formal solutions.

The Closeness of Rough Fuzzy Sets

Abstract: In this paper, some properties of rough fuzzy sets are discussed. Based on these, the concept of the closeness of rough fuzzy sets is given. Then, the closeness of distance, the least closeness, the greatest closeness , the least average closeness and the closeness in the lattice for rough fuzzy sets are defined.

On the Existence of Positive Periodic Solutions for a Three-species Predator-prey Systems with Michaelis-Menten Functional Response

Abstract: The existence of positive periodic solution for a three-species predater-prey nonautonomous systems with Michaelis-Menten functional response is studied in this paper. By employing the differential inequality and some analytic techniques, the sufficient conditions for existence of positive periodic solution are presented.

On WTO'S Influence on China's Higher Tourism Education

Abstract: WTO's influence on China's higher tourism education is many sideD It can introduce advanced foreign contents, methods and theories of tourism education, and bring about as well much new pressure and many new challenges, such as recruiting warfare, lack of teaching personnel and inadequacy for funds Within two or three years after entering WTO, higher tourism education must seize the historical chances of high speed development and increasing demand for professional personnel, change sense and mechanism, adopt new teaching ideas, enhance teachers' comprehensive qualities, increase teaching fund input, renew teaching equipment and means, and take as its development direction the cultivation of professional personnel, especially those in short supply in tourist business, planning of meeting and exhibition, publicity and promotion, resort designing and academic research, to be in an invincible position in intense competition of tourism education