查询词典 difference boundary value problem

Based on the study on the traveling salesman problem, in this dissertation, some results on the solving of production scheduling problem using the neural networks are described, which includes the following main parts: l The method which was put forward by Hopfield－Tank of solving the traveling salesman problem is analyzed, and the drawbacks of the method are pointed out. The interlinks between optimal tours and city distribution in the clustering and divide and conquer method are analyzed. A parallel network algorithm on the problem of the traveling salesman problem is presented.

主要包括以下几个方面的内容： 1对Hopfield和Tank提出的解决旅行商问题的方法做了分析和研究，指出该方法的严重不足；对于用聚类方法和各个击破的思想解旅行商问题，分析了最优路径与城市分布之间的几个关系；提出了一个解决旅行商问题的并行网络算法，由这一算法得到的解是&or-optimal&路径。

The algorithm has some problems, such as bias problem, aliasing problem and one problem that affects none-shade part of image and is caused by Gaussian blur. To solve these problems, this paper makes some improvement on the algorithm. Firstly, it uses the Woos average depth principle and PCF algorithm to solving bias problem and aliasing problem; secondly, it designs and implements an effective method to control the range of blur; thirdly, it adapts any size texture to story information. This method for keeping information plays important part on raising realistic graphic; fourthly, it takes use of the technology of programmable graphics hardware and the method of FBO to improve efficiency of algorithm.

由于基于高斯模糊的阴影算法存在阴影走样、量化误差和高斯模糊影响非阴影部分图像等问题，因此本文从以下几个方面对算法进行了改进：第一，在算法中添加了woo的平均深度值原理和PCF算法，改善了量化误差和阴影走样问题；第二，设计并实现了一种方法，有效地控制了高斯模糊的范围，提高了三维图形的真实感；第三，使用任意大小的纹理进行存储，提高了阴影的真实感；第四，通过可编程图形硬件技术的应用，提高了算法的运行速度。

Adopting speech record analysis by making a sound while thinking ,aiming at Organic Chemistry test questions and doing a lot of individual case analysis, The author summarizes the successful problem-solving thinking strategy for outstanding students of Organic Chemistry questions then edites the successful problem-solving thinking strategy for outstanding students as a teaching plan and trains consciously the students in the experiment team adhibiting the problem-solving thinking strategy for Organic Chemistry in the usual teaching practice activities to find out the characteristics of students" problem-solving thinking activity in Organic Chemistry and to improve the students" ability of problem-solving in Organic Chemistry rapidly.

然后，将优生成功解题的思维策略编成教案，在正常的教学实践活动中，有意识地对实验组学生进行有机化学问题解决思维策略训练，以了解学生有机化学解题思维活动特征，促进学生有机化学问题解决能力的迅速提高。实验以株洲六○一中学高三年级理科两个班的学生为被试，以自编《高中有机化学问题解决能力检验的前测和后测试题》和自编《高中生有机化学解题思维策略训练教程》各1套等为材料，通过6周的教学训练，收集训练前、后有机化学测试成绩等数据，采用SPSS10.0进行统计分析，得出如下研究结论： 1、对高三年级学生进行有机化学解题思维策略训练能有效地提高其有机化学解题能力。

Thirdly, we examine a job scheduling problem, in which jobs could be processed by multiple in-line steppers. This problem includes two decisions: job assignment and job sequencing. Through developing a new and concise representation scheme for modeling the two decisions, we solve the multiple-machine scheduling problem by various meta-heuristic algorithms. The preceding single-machine scheduling problem in fact is a special case of the multiple-machine scheduling problem.

第三部分探讨在多机情境下，求解工件排程问题，在此情境下产生两个决策变数：工件指派给各机台，以及工件在机台内的排序问题；为了解决此问题，本研究透过新的染色体设计，能同时代表此两个决策变数，使得解题空间变小，求得更好的解题品质。

The main idea of the finite difference method is as follows: We consider the discrete difference equation with the finite alphas as approximate substitution for the differential equation with the continuous variant and boundary conditions.

有限差分方法的基本思想是用离散的，只含有有限个未知数的差分方程去近似代替连续变量的微分方程及边界条件，并把相应的差分方程解作为微分方程的近似解。

Firstly, based on the wave equation, determining reasonably its initial boundary condition, the paper establishes a computer diagnostic model of oil pumping mechanical well, the damping factor in the model has been reasonably determined, the implicit difference solutionis conducted to the model by changing of step width expression difference solves, and the half analytical solution is explored to the model - fine integral method; and realizes the transformation from dot indicator diagram to indicator diagram of any section.

首先从抽油机井计算机诊断技术的理论基础入手，考虑多级抽油杆连续性，建立了粘滞阻尼波动方程，合理确定模型中的阻尼系数，采用无条件稳定的隐式差分法及半解析方法求解方程，获得抽油杆柱任意断面和抽油泵处的示功图。

Through the limit difference method,the partial differential equation of the semiconductor device is transformed into a difference equation,and the corresponding boundary condition is discretized with high accuracy.

采用有限差分法把器件工作的偏微分方程转化为差分方程，并将相应的边界条件转化为精度较高的离散化形式。

Magnetic field method is used to analysis the distribution of multi-medium, complex boundary, large difference in dimension, non-linear and forced axial symmetry magnetic field in magnetic fluid seal, the data is derived by unequally spaced net finite difference, and the results of different structure are showed by magnetogram.

利用变步长有限差分法对磁场法描述的磁流体密封中磁介质多、边界复杂、尺寸差别大、非线性的强磁场进行求解，得到了多种形式密封结构磁力线和磁感应强度等值线的分析结果。

In this paper,based on determination of initial and boundary condition,implicit difference method was used to present difference equations in order to simulate soil water movement of one-dimensional ponded water infiltration,redistribution and evaporation mathematically.

而数值法则可采用不同的初始和边界条件，实现复杂条件下水分运动过程的预测，从而给出相应条件下水分运动的分布规律[1，2]。

An algorithm for detecting moving IR point target in complex background is proposed,which is based on the Reverse Phase Feature of Neighborhood of target in difference between neighbor frame images that two positions of the target in the difference image are near and the gray value s of them are close to in absolute value but with inverse sign.

基于运动点目标在邻帧差分图像中所具有的近邻反相特征，即运动点目标的两个位置相邻近、灰度值一正一负，提出一种在复杂背景下，基于红外序列图像的运动点目标检测算法。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。