查询词典 second boundary value problem

The solution expression is suitable both for the inner and outer problem with a close boundary, and the calculation of velocity and pressure can be carried out separately, which is an advantage of boundary element scheme.

该方法的积分表达式可同时表示内、外边值问题的解，而且计算速度和计算压力的式子可以分别开，这是用边界积分公式求解的优点。

The modern philologist wants for many times to the idiom to make to mark out boundary, meeting with often again so hard nut to crack; Also therefore make sure the scope of the idiom, make a clear distinction it and other familiar languages, especially with consistently use the boundary of the language, became idiom a define of core problem.

现代语言学者多次想对成语作个划界，又不时碰上这样那样的难题；也因此，确定成语的范围，划清它与其他熟语，特别是与惯用语之间的界限，就成了成语界定的核心问题。

The full field boundary element solutions are solved for the small—scall yielding problem of boundary layer formulation.

针对双材料界面裂纹边界层构形计算了小范围屈服问题的全场解，并与现有理论和有限元结果进行了比较。

The model is a free boundary problem for a system of partial differential equations governing the intratumoral nutrient concentration and the intratumoral pressure. The free boundary is the surface of the tumor.

该模型是一个关于肿瘤内部压力和肿瘤内部营养浓度的偏微分方程系统自由边界问题，其中自由边界是肿瘤外表面。

There is no ferromagnetic material in the outside of ironless PM motors airgap. Because of this characteristic, airgap magnetic field of ironless PM motor belongs to 3-dimentions (3-D) open boundary magnetic field. Engineering problem of open boundary magnetic field is a hot research issue in the computation electromagnetics field recently.

无铁心永磁电机气隙外没有铁磁材料，其自身的结构特点决定了无铁心永磁电机的气隙磁场属于三维开域磁场，开域磁场工程问题的计算是近年来计算电磁学的研究热点之一。

The main contributions of this thesis are as follows:(1)To address the problem of kernel parameterσselection and regulation of the decision boundary in SVDD algorithm,this thesis proposes a new kernel parameter optimization method based on the spheral distribution of samples in kernel space and regulation of the decision boundary method based on KPCA(Kernel Principal Component Analysis).

本论文主要以支持向量数据描述(Support Vector Data Description，SVDD)与随机森林(Random Forests，RF)模式识别工具为基础，对流程工业在线故障诊断的若干问题进行研究，其具体内容如下：(1)针对SVDD的核参数σ优化及其决策边界规整问题，提出了基于核样本球形分布的核参数优化方法与基于核主元分析(Kernel Principal ComponentAnalysis，KPCA)的SVDD决策边界规整方法。

Phase-lagged cyclic boundary condition is implemented by a novel method in conjunction with the developed sliding interface technique to accurately simulate the arbitrary pitch ratio rotor/stator interaction without any modifications of the physics of the problem. It's for the first time to compose the computational area into one structured grids including both rotor/stator of centrifugal or axial turbomachinery with arbitrary pitch ratio. This method can eliminate the iteration of boundary conditions on the sliding interface and calculate the unsteady flow within rotor and stator simultaneously.

为了能够在较小的计算区域内不改变叶型而真实地反映出任意栅距比时的内部非定常流场，并避免近似仍采用相位后滞周期性条件，结合本文发展的网格技术，给出了一种新的实施方法，首次将动、静叶片数不等的离心式/轴流式叶轮机械转子、静子计算区域组合在一套结构化计算网格中，动/静叶排间的滑移界面完全按内场处理，避免了每一时层内，滑移界面处边界条件的迭代计算；并保证了每一时层，滑移界面处流动参数的守恒特性。

First of all,we have given some of the basic concepts of differential equations, described the constant coefficient linear ordinary differential equation solution, for a class of second-order variable coefficient linear ordinary differential equation initial value problem, an approximate solution, the method is first unknown function of a definition for N sub-interval, and then in between each district within a constant coefficient ordinary differential equations similar to the replacement, the solution has been the problem as similar to the original analytical solution, and then gives a detailed second-order change order coefficient of linear homogeneous ordinary differential equation solution examples, the examples of the approximate method proposed in this paper is valid.

首先给出了微分方程的一些基本概念，讲述了常系数线性常微分方程的解法，针对一类二阶变系数线性常微分方程初值问题，提出了一个近似解法，本方法是先对未知函数的一个定义区间作N等分，然后在每一个小区间内用一个常系数常微分方程近似替换，所得到的解作为原问题的近似解析解，随后详细给出了一个求二阶变系数齐次线性常微分方程的解的实例，该实例说明本文提出的近似方法是有效的。

The boundary value problem for first-order differential equations with a parameter refers to the finite solution condition of equation which includes unknown quantity and its first-order derivative that not only relies on interval value but also relies on the parameter of the equation,which is always settled by fixed point theory or successive approximation method.

含一个参数的一阶微分方程边值问题是指：含有未知量及它的一阶导数的方程的定解条件不仅依赖于在区间端点的取值，而且依赖于方程中的参数。通常它用不动点定理或逐步逼近法来解决。

According to the Value Chain Theory,this paper gives a kind of means of performance audit on value-chain analysis after studying the existed primary difficulties ubout performance audit such as lack of metewand and comparable data.At the same time,this study has integrated the practice of some perform- ance audit program.By this way,the auditor investigates and analyses the value chain of performance audit program and its key points,and evaluates its validity and value increment,discloses relational problem...

本文针对当前绩效审计缺乏评价标准和可比数据、难以找到准确的切入点等问题，在价值链管理理论的启示下，结合绩效审计实践中的探索和思考，提出了一套基于价值链分析的绩效审计方法，即通过调查分析被审计项目的价值链及其关键价值点，进而对价值链的内外联系以及关键价值点上作业活动的有效性、增值性等进行绩效评估，发现问题，做出评价，提出审计增值建议。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。