查询词典 difference boundary value problem

In the two test sites, the soil water movement numerical models of vertical-one-dimension and cross section two-dimension have been established with the softwarer Vadose/W and self-programming code, of which the advantage is that it can deals with lower boundary and the upper boundary (such as meteorologic, vegetational, etc) conditions in convenience. The fitting between the model and observation data from sites indicates that the models are relatively high precision. So the models can be used to study problems such as soil evaporation, infiltration to recharge groundwater and so on under various conditions.

运用包气带水分运移软件Vadose/W和自编程序，建立了两个试验场垂向一维和剖面二维土壤水运移模型，该模型的优势在于可灵活地处理下边界和上边界条件，试验场观测数据拟合表明模型精度较高，可用于研究各种条件下土壤蒸发、土壤水分下渗补给地下水等问题。

Experiments on synthetic images with low signal-to-noise ratio and scene images show good performance and robustness of the approach, especially it's capabilities of capturing the discontinuous boundary and moving snakes into boundary concavities.

对人工合成的低信噪比图像及景物图像的实验表明本文方法具有很好的性能及鲁棒性，特别是在处理目标边缘不连续及有凹形边缘时更显示了其优越的性能。

Experiments on synthetic images with low signal-to-noise ratio images and nature images show good performmance and robust of the approach, especially it's capable to capture the discontinuous boundary and move snakes into boundary concavities.

对人工合成的低信噪比图像及自然图像的实验表明，本文方法性能良好，工作稳定，具有较强的处理边缘不连续及进入凹形边缘能力。

The main results in this paper as follows: First, a prototype of a shape-based image database retrieval system is completed, it can receive the query mode both by giving an example image and by sketching the desired object on the screen, Second, five shape-based image retrieval methods are realized; Third, an algorithm based on triangulation for shape-based image retrieval is brought forward. In this algorithm, firstly, the edge of the original image is followed and the candidate corners in the original image are detected. Then the counterpoints of the candidate corners in the result of edge follow are found, and the boundary corners whose counterpoints have been found are queued in the order of their counterpoints in edge follow. After these steps, the boundary corners are triangulated and triangles are obtained which can show the true shape of the original image. Finally, shape feature is obtained by calculating the angle histogram of the triangles.

同时本文中主要完成了以下三方面的工作：完成了一个基于形状特征的图象检索的原型系统，可实现例子图象或徒手绘草图两种查询方式；实现了五种利用形状特征进行图象检索的具体方法，并对其进行了分析比较；并且在继承将三角剖分引入形状检索的思想基础上提出了利用三角剖分进行形状检索的一种新算法：先对原图象进行边界跟踪和角点检测；然后寻找初始角点在边界跟踪中的对应点，并对找到对应点的角点按其对应点在边界跟踪中的顺序进行排序；再对排序后的角点进行德洛内三角剖分，得到能表示目标真实形状的三角形序列；最后计算三角形序列的角度直方图作为形状特征，并进行相似性匹配。

The Bengtsson-Jacobson conjecture that "degenerate phase boundaries are always null" is studied by the mapping language in Chapter 4. By distinguishing a "phase boundary" from its image in the "covariant approach", the nulless of the image is proved. Time-like and null hypersurfaces in the degenerate space-times in the Ashtekar theory are denned, and then the phase boundary obtained by the "covariant approach" is shown to be always null.

我们在第四章用映射的语言分析了Bengtsson和Jacobson关于&相边界为类光&的猜想；通过区分&协变方法&中的&相边界&和它的像，我们证明了像的类光性；在定义了Ashtekar退化时空中的类时和类光超曲面之后，我们证明了&协变方法&得到的相边界必定是类光的。

The results showed that the adhesion characteristic between PC and acrylate adhesive was significantly improved after modification because of ion beam bombardment resulted in excellent hydrophilicity, increasing of the polarity, denuding of the weak boundary and engendering of crosslinked boundary.

结果表明：改性后的PC与丙烯酸酯胶黏剂的压剪强度得到了明显的改善。经分析，粘接性能的改善是由于低能离子束表面改性后的PC表面润湿性能的改善、表面活性的提高、表面弱电层的剥蚀和表面微交联层的生成引起的。

At present, There are greatly divaricates about the boundary of the appellation in modern Chinese. Above all, this article definitude the connotation and the extension. In the second part, the article particularly expatiate the five kinds of the titles on the base of the boundary. In the third part, on the base of sorts the article searches the combination rule of every kind of titles and the relation of combination.

第二部分在称呼语界定的基础上，对各类称呼语进行了分类阐述，将称呼语分为五类，并在此基础上进而划分小类，力求对每类称呼语进行详尽阐述，第三部分则在分类的基础上探求各类称呼语的组合规律，探讨了四类称呼语的组合关系。

The plastic deformation which is caused by the enrichment of edge dislocation with the same symbol, the incline crystal boundary which occurs when edge dislocation arranges vertically and the dissymmetry incline crystal boundary which is born of the distortion of crystal lattice are the three kinds of possible mechanism by which the graphite gets more crooked as nitrogen adds.

同号刃型位错群聚产生的范性变形，同号刃型位错垂直排列所产生的倾侧晶界，以及因晶格畸变而产生的非对称倾斜晶界是氮使石墨弯曲程度增大的三种可能机制。

More than 100 unforgettable days and nights, members of the Joint Inspection of all work and live in the mountains of the Himalayas, the snow lying on ice climbing,Hard to make a living, sincere cooperation, a high sense of responsibility and mission, completed more than 1400 km boundary line and 100 stars the work of the Joint Inspection of the boundary markers.

一百多个难忘的日日夜夜，全体联检成员工作生活在喜马拉雅山脉的群山里，爬冰卧雪、风餐露宿、精诚协作、以高度的责任感和使命感，完成了1400多公里边界线和100颗界桩的联检工作。

Automatic boundary extraction of multiple targets of interest in an ultrasound image can not only help clinicians find out most perceptible objects, but also save sonologists' time for boundary delineation. Moreover, it is potentially helpful for the novice instruction and medical research.

中文摘要超音波影像之目标物自动边缘侦测，可帮助临床医师找寻可疑的目标物，节省检测人员手绘目标物的时间，还可以应用於超音波影像之电脑辅助诊断，新进医师的辅助教学，对於医疗诊断与教学研究都有帮助。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。