查询词典 arid region

In order to improve the accuracy of segmentation of region growing and reduce the number of user interaction,a segmentation algorithm of region growing based on confidence interval and region competition is presented.

为了提高区域生长的分割精度，减少种子点选取对分割结果的影响和用户交互量。提出一种通过置信区间和区域竞争计算目标区域最优阈值区间，用于医学序列图像的区域生长分割算法。

This thesis has generalized the characteristics of displacement model's confidence region, inferenced the shapes of plane and space displacement confidence region, determined calculating formula of confidence region.

文中对位移模型置信域的基本特征进行了归纳、推导，确定了平面和空间位移置信域形状，给出了确定置信域的计算式。

Regional development strategy of the state can lead to regional disparities expanding, and also can be as an external condition for underdeveloped region to achieve convergence;resources of western region can cause influence to regional development, but it is limited, and function with other conditions as premise, such as environmental abilities, technologies etc. Even to some degree, western region fell into present environmental poverty just owing to abundant resources.

在外部条件中，国家的区域发展战略可以导致地区差距的扩大，同时也可以作为实现区域趋同的外部条件而存在；而西部地区的资源禀赋对西部地区的发展产生的影响是有限的，并且作用是有条件的，甚至在大程度上正是由于资源的丰富而导致了西部地区目前的环境贫困。

The minimum potential region of water vapor transport vector correspond to intense heavy rainfall region, and the water vapor convergence of the heavy rain region is supplied by the hemisphere scale water vapor transport, indicating that even for a regional severe flood it must gain water vapor supply from very extensive regions.

水汽通量的势函数极小值区对应强降水区，并且暴雨区的水汽辐合是由半球尺度的水汽输送造成，这表明，即使对于该年背景的区域性大暴雨/洪水，它也必须从极大范围地区获得水汽供应。1999年水汽辐合的中心位置较1998年偏东偏南，这使得1999年降水较1998年偏南。

This article focuses on the line-line, line-region and region-region topological relations algorithm, which come down to the same question: whether there are intersections between line and line. The sweep-line algorithm was studied by many people, but has some deficiencies to be improved, in order to handle some special cases and increase program efficiency. My works as follows: rectangular envelope to reduce executive times , vector cross multiplication to determine intersection between line and line, coordinates and slope method to deal with some special cases. C program examples are showed together.(5) Finally, to prove capability and efficiency of the model and calculation method, some test systems are developed. For example, complex spatial topological relation query, parcels' exact area with the area of linear object reduced in land use, quality inspection to cadastral data according to topological rule, spatio-temporal change query of cadastral data.

将线线、线面、面面之间的拓扑关系实现的算法归结为线与线之间求交的基本问题；为处理一些特殊的拓扑关系情况，提高扫描线算法的效率，探讨了包络矩形粗滤、判断线线是否相交的矢量叉乘法、线节点重合或共线的斜率坐标判断法等改进方法；同时还设计了一种新的节点微小圆求交的算法，可应用于图斑与线状地物细分拓扑关系及地类面积的计算；（5）本文设计了实验系统，包括复杂对象的拓扑关系表达与计算程序、图斑地类面积的计算程序、基于空间拓扑关系规则的地籍数据库质量检查功能，以及时空拓扑关系和变化语义分析等原型，验证了拓扑关系表达模型和计算方法的可行性和实用性。

There isn"t obvious selectivity in blank cutworm imperilment, the onseting quantity and imperilling degree is similar on different crops. It"s more serious in the field of invasion of weeds and corn intercrop potato than single cropping of corn, and the field of forecrop green manure is more serious than single cropping. Imperilment degree of black cutworm is very serious in both high altitude region as Dewu (1780 meters) and low altitude region as Lemin (1450 meters). The imperilment degree in two regions have no obvious differences. 4. The imperilment of second generation armyworm is very serious in both high altitude region of Dewu and low altitude of Lemen town.

3小地老虎的为害对品种没有明显的选择性，各品种小地老虎发生量和受害程度相似；作物对小地老虎发生为害程度影响较大，杂草丛生的地块和玉米与马铃薯间作的地块受害程度明显高于玉米净作地块，而前作为绿肥的地块受害程度也比净作高；土壤条件对小地老虎发生为害程度有影响，土质疏松、肥沃、团粒结构良好的地块受害程度明显比地势低洼、土质粘重、瘠薄的地块重；小地老虎在高海拔的德坞(1780米)和低海拔的乐民(1450米)两地发生为害均较重，为害程度没有明显差异。

The apparent degradation reaction activity energy of PET and PC are evaluated to be 27. 19kJ. mol〓 and 35. 75kJ. mol〓 in system noncritical region respectively. The mass transfer and scatter, which are the controlling factors of degradation in system noncritical region, change into chemical reaction in system critical region, where the activity energy of PET and PC are evaluated to be 89. 79kJ. mol〓 and 80.61kJ. mol〓 respectively.

在系统的非临界区域，PET、PC的降解为液固相反应，反应速率很低，其降解反应表观活化能分别为为27.19KJ.mol〓和35.75KJ.mol〓，为传质、扩散控制；在系统的临界区域，PET、PC的降解为液态均相反应，降解反应速率显著提高，其降解反应表观活化能分别为89.79KJ.mol〓和80.61KJ.mol〓，为化学反应控制。

At the same time, the practical implementation of evolutionary algorithm is given in order that evolutionary algorithm is introduced into vector quantizer. In the fourth section the asymptotic theory of vector quantization is studied. Then the partial distortion theorem that when codebook size is large enough, each region of the partition makes an equal contribution to the distortion for an optimal quantizer, which is the key part of vector quantizer is obtained. Finally, the competitive learning algorithm based on the partial distortion theorem is proposed, which introduces the subdistortion of each region into the distortion measure to assure that the subdistortion of each region approximately equals to each other.

第四章详细研究矢量量化的渐近理论，然后得出了矢量量化器设计的核心部分——部分失真定理，当码本尺寸足够大且输出矢量的渐近概率密度与输入矢量的概率密度的幂成比例时，最优量化器划分的各个区域对该量化器的平均误差产生相同的影响，最后提出基于部分失真定理的竞争学习算法，它通过在误差测度中，引入与各区域相关的子误差以保证各区域的子误差近似相等，该算法实现较为简单，在一定程度上确保全局最优。

We use the Taylor series expansion method to get the second-order approximate expression of the confidence region of the parameters, and then according to the principle of minimizing the volume of the confidence region, this paper carries out experimental design for the regression model, and then fixes the point range in the domain of definition of design variable for the model function so as to select the designing point, which can minimize the volume of the confidence region.

文章首先计算指数族非线性模型的回归参数β在1-α置信水平下的置信域的体积，为了便于计算，需把置信域投影到切空间中去，投影后的置信域是一个椭球体，用Taylor展开方法对此椭球体的体积进行二阶近似，推出原参数置信域的体积的近似表达式，然后对回归模型进行试验设计，根据置信域体积最小准则，在模型函数的设计变量的定义域上确定点列，选取使置信域体积达到最小的设计点。

It is also possible to create double-ended chunks, where the committed region is any contiguous subset of the reserved region, with size equal to an integer multiple of the processor page size. These chunks can have both the bottom and top of the committed region altered dynamically.

另外还可以创建 double-ended chunk ，那么委托区将是保留区的任意连续子集，他的大小也是处理器页面大小的整数倍，这种Chunk的委托区可以有两个顶端和底端，并且它们的大小也是可变的。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。