查询词典 calculus of finite differences

Proceed from general conclusion of algebra on the finite field, study this special algebra system of Elliptic Curve on the finite field, Discuss that sets up several theories of the Public Key Cryptosystems and the problems of implementation on it.

从有限域上的代数的一般结论出发，研究有限域上的椭圆曲线这一特殊的代数系统，讨论在其上建立公钥密码体制的若干理论和实现问题。

The finite element stiffness matrix of the equivalent beam or pipe of the cracked leg of the platform is derived using the finite element method.

采用有限元分析方法和断裂力学方法，将含裂纹构件的裂纹段以线弹簧处理，建立了带有裂纹损伤桩腿的等效梁和管单元的单元刚度矩阵的计算方法。

E. new extrapolation value s of finite element solutions on the first two level grids are used to provide the good initial value s on the third level grids and then an exacter finite element solution can be obtained by several CG-iterations.

摘要提出一种求解大规模有限元方程组的新外推多网格法，即用前两层网格上有限元的新外推值提供第3层细网格上的好初值，然后用几次CG-迭代能得到较准确的有限元解。

Developed an ability to analyze the primary sentence structures of English, such as finite and non-finite clauses, simple, compound, and complex sentences, active and passive voices, declarative, imperative, interrogative, and exclamative sentence types, and embedded clauses belonging to distinct grammatical categories e.g.

二、培养分析英语基本句型的能力，如限定与非限定子句、简单、并列与复合句式、主动与被动语态、直述、祈使、疑问与感叹句型，以及分属各类语法范畴的附属子句（如名词子句、形容词子句、副词子句）。

Secondly, the gun barrel temperature field is solved by two-dimensional and one-dimensional heat conduction model with finite element method and finite difference scheme respectively.

其次通过对身管二维轴对称传热模型和一维径向传热模型的数值计算，研究了身管固壁的传热问题。二维轴对称传热计算采用了有限单元法，一维径向传热计算采用了有限差分法。

Firstly, according to electromagnetic field theory, the 2-dimensional (2-D) mathematical model of a three phase squirrel-cage Y802-2 induction motor is developed. Then general equations can be deduced from finite element discrete and functional analysis. The motor's 2D solving region of electromagnetic field is given based on the boundary conditions and assumption conditions of the squirrel-cage induction motor. Through finite element mothod and inner–outer convergence method, magnetic field distributions and magnetic forces of bars can be calculated in following rotor conditions: health rotor, one single broken bar, two adjacent broken bars, two broken bars with one good interval, two broken bars with two good interval and four adjacent broken bars.

本文首先根据电磁场理论建立Y802-2型三相笼型感应电动机二维电磁场的数学模型，并对其进行了有限元离散以及泛函分析，推导出总体方程；在基本假设和边界条件基础上，给出笼型感应电动机二维电磁场的求解区域，然后应用有限元并结合内外双收敛方法，对样机稳态运行进行数值计算，得出电机在转子完好、一根导条断裂、连续两根导条断裂、间隔一根两根导条断裂、间隔两根两根导条断裂及连续四根导条断裂六种情况下的磁场分布和导条所受电磁力的变化情况。

Also called a deterministic finite automaton, or simply a finite state machine.

也称为确定性有限自动机，或者只是一个有限状态机。

Although the adjacency matrix was a storage structure of finite automaton in common use, it was not proper to store all kinds of finite automata.

尽管邻接矩阵是有穷自动机的一种常用存储方法，但是，邻接矩阵并不适合存储所有类型的有穷自动机。

The finite element model of base plate is used in modal analysis and transient dynamic analysis by means of the elasticity finite element method.

同时运用弹性力学有限元法对座钣建立的有限元模型进行模态分析和瞬态动力学分析。

Some important factors in finite element analysis, such as the quality of meshing andtime-step, are studied and analyzed deeply, which is the base of correct finite elementcomputation.

对影响有限元分析的有关重要参数(如，网格尺寸、网格比例、时间步长等)进行了深入的研究和讨论，为正确地进行有限元计算提供了重要依据；在模型验证的基础上，分别利用模拟器对裂缝半长、导流能力对产能的影响进行了模拟研究，得出了有意义的结论。

We have limited budget let me know if you can do this competitively.

我们有限的预算让我知道如果你能做到这一点竞争力。

We don't know how other critters breathe--lizards, for example.

我们还不知道诸如蜥蜴之类的动物如何呼吸。