分布

The established models in which annual precipitation was incorporated as the principal variable indicate a very closely correlation between forest productivity and its corresponding climatic factors,allowing to simulate distribution pattern of actual forest productivity effectiv...

结果表明：在所构建的模型中，除海拔高度与净生产力的相关模型外，其它模型均有较高的实用价值，模型的拟合曲线变化，基本反映了中国森林现实生产力的地理分布格局；中国森林生产力的分布格局主要取决于气候环境中的水热条件，水分条件是决定中国大部分地区森林生产力水平和地理分布格局的主导因素；根据7个GCMs大气环流模型预测合成的2030年的气候情景，研究气候变化对中国森林生产力影响的结果是：气候变化并没有改变中国森林第一性生产力的地理分布格局，即从东南向西北森林生产力递减趋势不变，但不同地域的森林生产力有不同程度的增加。

ABSTRACT: In order to establish the reliability model of long pipeline and rope, which is capable of reflecting the correlativity between virtual components, the present paper illuminates the segment partition principle of long pipeline and rope continuity system, relationship between sizes of virtual segments and features of flaw distribution, distribution of segment intensity, the failure correlativity among components, relationships of segment sizes, relationships between distribution of system intensity and that of segment intensity and so on.

为了建立能反映虚拟的"元件"间失效相关性的长管道或缆绳的可靠性模型，论述了管道、缆绳类连续系统的单元化原则，虚拟单元的尺寸与缺陷分布特征的关系，单元强度分布及单元间的失效相关性与单元尺度的关系，系统强度分布与单元强度分布的关系等。

In order to establish the reliability model of long pipeline and rope, which is capable of reflect ing the correlativity between virtual components, the present paper illuminates the segment partition principle of long pipeline and rope continuity system , relat ion ship between sizes of virtual segment s and features of flaw dist ribution, distribution of segmentin tensity, the failu recorrelativity among components, relat ion ships of segment sizes, relation ships between distribution of system intensity and that of segment in tensity and so on.

摘 要：为了建立能反映虚拟的"元件"间失效相关性的长管道或缆绳的可靠性模型，论述了管道、缆绳类连续系统的单元化原则，虚拟单元的尺寸与缺陷分布特征的关系，单元强度分布及单元间的失效相关性与单元尺度的关系，系统强度分布与单元强度分布的关系等。

A general model of two phase image segmentation based on variational level set method is proposed,and the region model is based on the image general probability distribution function.

基于变分水平集方法建立了两相图像分割的通用模型，其区域模型基于图像的一般概率分布函数，通过变分方法得到水平集函数的演化方程和符合常值分布、Gauss分布及Rayleigh分布的参数估计。

Suppose is two-dimension random variable, call the probability distribution of measuremarginal distribution on for ; the probability distribution of measure Y marginal

Definition 3.6 设是二维随机变量，称分量的概率分布为关于的边缘分布；分量的概率分布为关于的边缘分布。

Through the analysis for experiment result, The form of probability distributions on the unit length of breakwater with attack angle is presented, and the effects of wave angle, multi-directionality, wave steepness, and relative wave height on wave parameters of probability distributions are analyzed. The rules of statistical distributions of oblique and multidirectional wave forces are presented.

通过试验结果分析，给出了作用在直立堤上的单位堤长波浪力的概率分布形式，讨论了波向角、波浪方向分布宽度、波陡及相对波高等因素对单位堤长波浪力概率分布参数的影响，给出了斜向和多向波作用于直立堤上单元堤长的总力统计分布规律。

Results to obtain the location of the content and distribution of Staphylococcus law, when the dynamic equilibrium of its distribution after the crop, jejunum within the district with the largest, at least Proventriculus distribution, which the digestive tract for the turkey provided microecological dynamics scientific data.

结果从而获得了这些部位葡萄球菌的含量及分布规律，当其分布达动态平衡后，以嗉囊、空肠内分布最多，腺胃分布最少，这为火鸡消化道微生态动力学提供了科学数据。

Environment radon is mainly from rock and soil in geological environment, but the research is not connected with geological environment now. On the basis of physical field, the theoretical distribution model of radon in soil and exchange model of earth—air are set up by using Fick diffusion law and Dacy law, and then the research of environment radon is linked with geological environment. This paper described how the evry parameter of the theoretical model influence the radon concentration in air. The results of research indicat that molecule diffusion of radon is different from it's eddy form. Under the condition of surface radon source, the model experiment is used to study the transportation and distribution of radon in medium. The data of experiment show the relationship between radon and depth can be described by exponent. If the radioelement is well—distributtion, the concentration of radon in different depth or in different point at the same depth change with time, but the accumulated exhalation amount of radon at different point on the surface of model are close in relative long time. The author studied the exchange of radon between mediums and verified the theoretical models too.

环境氡主要来自岩石、土壤，而目前环境氡研究中与地质环境结合很少，为此作者以物理场为基础，运用气体运移的费克扩散定律和达西定律，建立起壤中氡浓度分布与大地—大气间氡交换理论模型，首次在理论上将环境氡与地质环境结合起来；论文中从理论上讨论了模型中各参数对空气中氡浓度的影响，发现空气中氡运移的分子扩散方式和湍流扩散方式存在明显差异；通过面状氡源条件下的氡运移模型实验，研究了介质中氡的运移与分布，实验数据表明氡浓度随深度的变化规律可用指数函数描述，在放射性元素分布均匀的条件下，介质中不同深度和同一深度不同点的氡浓度随时间而变，但介质表面不同点在较长时间内向空气中累计释放的氡的量是相近的；同时研究了不同介质间氡的交换，并验证了所建立的理论模型；运用理论模型预测青岛市城区壤中氡浓度、江西临川一住宅区空气中氡浓度及江西二个测区的区域空气中氡浓度分布，取得了较好的效果。

The class of distribution of decreasing variance residual life an that of decreasing percentile residual life are investigated,some their characters are also given,and their characteristic result is given when the general moments of residual life function are taken as their basis.

阐述了递减方差剩余寿命分布与平衡分布的平均剩余寿命函数的密切联系；研究了递减方差剩余寿命分布类及递减百分位数剩余寿命分布类，并且给出了它们的一些特征；给出了以剩余寿命函数的一般矩为基础的特征结果。

Simulation results also show that saddle-shaped distributed AMF can more effectively inhibit constriction of vacuum arc.

对于小电流扩散态真空电弧，重点仿真分析不同电弧电流与不同纵向磁场对其关键特性的影响，部分仿真结果进行了实验验证；对离子处于超音速流动的收缩态真空电弧的仿真表明，真空电弧的磁收缩主要是由于霍尔效应引起的，离子温度和电子温度沿轴向先增大后减小，马鞍形分布的纵向磁场能够更有效地抑制真空电弧的收缩，而且阴极斑点分布对真空电弧特性也有着显著的影响；对离子处于亚音速流动状态的大电流真空电弧的仿真表明，部分等离子体不能到达阳极而损失，马鞍形分布的纵向磁场能够更有效地抑制电弧等离子体的损失，同时能使阳极电流密度和能流密度的分布更加均匀。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。