This article uses SHARED object-oriented modeling to model the design artifact information,and studies what form and what specification are adopted to store the design artifact information in order to satisfy the artifact modeling requirement of design repositories.

For example, by giving historical narration on the drawings of Navy in that period and focusing on different . expression patterns on the subject, the article offers an interpretation of how the image of New China Navy comes into fine art history and in what form it presents its' cultural characteristics in that era.

Cu concentrations in Fe deficient plants in Treatments EDTA Cu, NTA Cu, oxalate Cu, and citrate Cu, were lower than that in Treatment Cu. But Cu uptake, no matter what form of Cu, by Fe deficient plants was higher than that by Fe sufficient plants.

For a linear system of differential equations with constant coefficients. it is well-known that, if all eigenvalues of A have negative real parts, then the trival solution of (1) is asymptotically stable.However, the problem is much more difficult for a linear timc-varying system in the relation between the signs of Re(λ_i(t)) of the eigenvalues A(t) and the stability of the dynamical systems. Examples of all kinds of the combinations are afforded in this paper in order to show its complexity. However, when...

For a linear system of differential equations with constant coefficients. it is well-known that, if all eigenvalues of A have negative real parts, then the trival solution of (1) is asymptotically stable.However, the problem is much more difficult for a linear timc-varying system in the relation between the signs of Re(λ_i(t)) of the eigenvalues A(t) and the stability of the dynamical systems. Examples of all kinds of the combinations are afforded in this paper in order to show its complexity. However, when the rate of change for elements a_(ij)(t) of A(t) is sufficiently slow, and the method of Lyapunov function is used, the problem can be solved thoroughly. In addition, an explicit bound for the a_(ij)(t) is given, no matter what form matrix A(t) has. Similarly, explicit bounds for the nonlinear additional terms and the time-lag bounds for the time-lag systems are given.

This paper makes an approach to the three problems on the gravel grains movement in the Three-Gorge reach of the Yangtze River. ( 1 ) In what form are gravel grains transported in the reach? (2 ) what is the saltation height which gravel grains may have in their movement in the reach as bed load? (3)What is the height at which the gravel grains are suspended possibly in the reach? The results of previous studies concerning this respect are briefly reviewed in this paper and then, according to the hydraulic...

This paper makes an approach to the three problems on the gravel grains movement in the Three-Gorge reach of the Yangtze River. ( 1 ) In what form are gravel grains transported in the reach? (2 ) what is the saltation height which gravel grains may have in their movement in the reach as bed load? (3)What is the height at which the gravel grains are suspended possibly in the reach? The results of previous studies concerning this respect are briefly reviewed in this paper and then, according to the hydraulic conditions in the Three-Gorge reach, analytical views are put forward respectively on the three questions above-mentioned.

In this paper, a remark on the general development of structural analysis programs in recent years is made. And the importance of appling microcomputers in the structural analysis is emphasized. The particularity of using microcomputers for structural analysis is discussed.what form the program