planar vector fields

Using the software Mathematica and bifurcation method of dynamical systems,the phase portraits of a quartic vector field are studied.

用数学软件Mathematica和动力系统分支方法对一类四次平面向量场的相图进行研究,参数半平面被9条分支曲线分成10个区域,在软件Mathematica下,每一个区域和每一条分支曲线上的相图被计算机画出。

Research on water flooding effect improved by vectorial well arrangement for reservoirs with permeability heterogeneity in plane;

矢量井网改善平面非均质油藏水驱开发效果研究

Distribution of Magnetic Charges in Arbitrarily-shaped Region on the Plane;

平面上任意形状范围内的磁荷分布

Simulation of Even Material Removal During Eccentric Plane Polishing by a Tin Polisher;

定偏心锡磨盘超精密平面抛光均匀去除模拟计算(Ⅰ)

Anti-earthquake research is done on various type of flat metallurgical buildings of reinforced concrete,the affecting factors are analyzed such as: working space,shift and twist,column shape,roof rigidity,side-way stress resistance of gable and longitudinal wall and so on,the adjusting index for space effect and twist influence in flat truss calculation proposed.

针对各种类型的钢筋混凝土单层冶金厂房进行抗震研究,考虑到厂房的空间工作、平移和扭转、柱子形式、屋盖刚度、山墙和纵墙的抗侧力作用等因素,提出了平面排架计算的空间作用和扭转影响的调整系数。

The flatted-painting resulted from the previous internal evolution of paint-ing.

绘画平面化就是绘画内部先前事件的结果，它的目的是要使绘画内部诸形式手段获得独立并指向自身，这种发展的内在逻辑并不会随着社会的，经济的，意识形态的变化和转折而更改。

Taking Dong Nationality s traditional residence in Tongdao, Hunan for examples, this paper studied on the technological characteristics of it, from the respects of plan style, structure mode and constitution method, and summarized that the general features of Dong Nationality s traditional residence are simplicity, utility and freenes

本文以湖南通道侗族传统住宅为例,从平面类型、结构方式、构造做法几个方面研究了侗族传统住宅的建筑技术特点,认为简朴、实用、不拘一格可以视为侗族传统住宅建筑技术的总体特色。