查询词典 implicit function theorem

Spectral element methods for partial differencial equation is introduced in this study from viewpoint of the collocation approximation of Chebyshev polynomial. Wave Equation and its space discretization are deduced. Two time integral methods, central difference method and implicit Newmark method, are introduced, and their stability and applicability are also discussed in some details. The significance of absorbing boundary conditions in spectral element methods for Aeroacoustics is explained, and Clayton-Engquist-Majda absorbing boundary conditions is emphasized and introduced, then the discrete scheme of this boundary conditions is deduced and applied to spectral element methods for wave equation.

本文从Chebyshev多项式逼近理论出发，详细介绍了谱元方法求解偏微分方程的过程；推导了流体中的声波动方程并在空间上对其进行了谱元离散；详细讨论了两种时间积分方法──中心差分法和Newmark方法，分析了它们的稳定性条件，并从理论上对比了两种方法的优缺点和适用范围；将吸收边界条件推广应用于谱元方法求解气动声学问题中，重点介绍了Clayton-Engquist-Majda吸收边界条件的原理和公式，推导了该吸收边界条件的变分形式，并将其引入波动方程的离散形式中。

The numerical modeling process for SVE remediation is achieved after a steady alternant direction implicit finite difference format is developed. In this paper, as an example, the 60 days remediation under 4 different conditions is simulated, which proves that the clear-up result is mainly governed by soil permeability.

再采用一个稳定的交替方向有限差分解出传质微分方程，从而实现多维情况下竖井SVE修复的完整模拟过程。4组不同条件下为期60d的SVE修复过程的计算机模拟显示，土壤通透系数是决定修复效果的关键因素。

VOF equation use Lax-Wendroffgeshi scheme with precision of two steps. Pressure of host field is turned into initial-boundary value problem of variable coefficient parabolic equation on regular border. We utilize implicit difference method to solve it.

VOF方程的离散求解使用Lax-Wendroffgeshi格式，这种格式具有二阶精度；主场压力的求解转化为固定边界上变系数抛物型方程的初边值问题，采用隐式差分格式。

Had some implicit but unexpressed arrangement been come to between the police and the complainant at 160?

警方和160号的投诉者之间，有没有一些不成文的隐密安排？

Implicit transaction costs is a composite indicator to measure the efficiency of stock.

更多、有效性低、价格波动性高会导致隐性交易成本增大，运行效率良好的股票市场必然有较低的隐性交易成本。

By use of implicit scheme,exit and wall temperature varying with time in air-precooled heat exchanger for compound engine are extracted.

利用隐式格式，求得组合发动机空气预冷换热器随时间而变的出口及壁面温度。

There are explicit and implicit schemes in FDM . explicit scheme are easy to compute and make programmes, but it has a problem of conditional stability and the exactness is not high .

有限差分方法主要有，显式格式和隐式格式(Crank-Nicolson格式)，其中显式格式虽然计算简单，便于编程，但有稳定性限制，并且精度也比较低，不便于适用。

The students learn too little implicit cultural background knowledge some words connote in the textbooks.

2学生对课本所蕴含的文化背景知识了解甚少。

In fact, the style of contemplativeness refers just to such characteristics of Du's poetry as deep thought, strong emotion, tragic sense, tender feelings, implicit comfort and nostalgia.

而要想做出这个系统的归纳，不仅要弄清杜甫本人所说的含义，还要弄清后人在以这一概念描述杜诗风格时所赋予的新的含义。

In fact,the style of contemplativeness refers just to such characteristics of Dus poetry as deep thought,strong emotion,tragic sense,tender feelings,implicit comfort and nostalgia.

沉郁顿挫的风格是指杜诗运思深刻，感情浓烈，声情悲壮，而又忠厚缠绵，含蓄蕴藉，回环往复的特点。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样