查询词典 general equation

In 3D scalar Helmholtz equation computation, for the first time, this dissertation proves that there is an analytical solution of infinite series convegence for the problems satisfying the MT expansion condition, derives the MT general solution formula and the using laws, proves or explains the using rules that are used in the GMT and but they can't be proven or explained by The GMT.

首次从理论上证明，在三维静电场分析中，存在一种无穷级数收敛，且有一定普遍性的解析解；推导出三维静电场分析的多极理论通解及其使用规则，证明或解释广义多极技术不能证明或解释的若干使用规则，用多极理论求解工程实际中的三维静电场边值问题。

A numerical method, where the pressure is used as a primary dependent variable, is presented for the solution of the two-dimensional steady Navier-Stokes equation in general curvilinear coordinates.

本文采用了求解压力速度耦合的SIMPLE算法，以压力为主要求解变量对Navier-Stokes方程进行数值求解。

A numerical method, where the pressure is used as a primary dependent variable, is presented for the solution of the two-dimensional steady Navier-Stokes equation in general curvilinear coordinates. SIMPLE (Semi-Implicit Method for Pressure Linked Equations) is mainly adopted.

本文首先详细推导了二维任意曲线坐标系下张量形式的流动控制方程及其和压力修正方程的离散形式，应用求解压力速度耦合的SIMPLE算法，以压力为主要求解变量对Navier-Stokes方程进行数值求解。

First, under general conditions, we solvethe locomotive's cyclic working current equation with the analyticaland the numerical methods combined, giving a computing module quitefitting in with practicl results.

文中首先在一般条件下用解析法和数值方法综合求解了SSI型电力机车的周期工作电流方程，给出了比较切合实际的计算模型。

On the basic of heat equation method, a general math modeling of heater is developed., as well as a lots of real-time math modeling of heating system, such as math modeling of heat economic analysis、relative internal efficiency of HP cylinder、relative internal efficiency of MP cylinder and LP cylinder、utilization of blow down water tank、steam make-up of deaerate and steam leakage of seal gland.

热力系统在线性能计算和热经济性分析在降低机组煤耗，提高火电厂运行效益方面具有重要的作用。

And the semi-lethal temperature of the plant tissues was gotten according to Logistic equation. The result shows that these cultivars' semi-lethal temperatures distribute from -2.91 to -5.48℃. With the application of geography information system, the temperature suitable ecotopes in China of Bougainvillea were established by use of -3℃, the general lethal temperature, as the determinator.

对我国广泛栽培的21个三角梅品种进行了模拟低温电导率测定，确定低温致死范围在-2.91℃～-5.48℃之间；以三角梅品种普遍致死温度-3℃为依据，采用地理信息系统进行了三角梅在我国的温度适宜区划。

Chapter two proposes the unified form of Hojman"s conservation law and Lutzky"s conservation law. Firstly, the author introduces the general Lie group of transformations that the variations of both the time and the generalized coordinates are considered, derives the determining equation of Lie symmetry for the system, presents a new conservation law, which contains the Hojman"s and the Lutzky"s conservation law as two special cases, and obtains a condition to exclude trivial Hojmans conserved quantities.

第二章，Hojman定理和Lutzky定理的统一形式：首先，引入一般意义下的Lie变换群(即位型变量q_s和时间变量t同时变换)，给出系统的Lie对称性确定方程，提出一个新的守恒律，Hojman定理与Lutzky定理则分别是这个新守恒律在两个特殊情况下的推论，导出一个可排除平凡Hojman守恒量的定理，并分别讨论了Birkhoff系统和非完整系统的Lie对称性和Hojman守恒量，最后，讨论了Hamilton系统的梅对称性与Lie对称性的关系，给出了由梅对称性求Hojman守恒量的方法。

By the methods of reducing order and Euler s eigenvalues,we obtain the general solution formula to one kind of systems of three dimensional second order ordinary differential equation with constant coefficients.

采用降阶和特征根方法，给出了一类三维二阶常系数微分方程组的通解公式，并通过算例与拉氏变换法进行了比较。

A.Einstein's personal experience had founded his belief in mathematics and relevant methodology,success in the general theory of relativity had his belief enhanced,and this had led Einstein astray in introducing the semivector for research Dirac's equation.

爱因斯坦；数学信仰；半矢量；爱因斯坦的科学经历铸就了他的数学信仰以及相应的方法论，广义相对论的成功使这种数学信仰得到强化，并使他在引入半矢量研究狄拉克方程过程中误入歧途。

The physical solutions of the Dirac equation with non-zero rest mass are found outside the event horizon of general spherically symmetric and charged evaporating black hole.

引 言自从Balbinot研究了考虑到反作用时的蒸发黑洞的Hawking辐射以来，这一研究领域引起了国内外理论天体物理学家的极大兴趣[1 5]。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。