等分布

The exponential distribution family and minimum error theory are brought to bear combined with fact.

针对小样本和小失效数给系统可靠性分析带来的难度，以及可靠性分布函数和参数估计的不确定性和模糊性，运用指数分布族、最小误差原理等相关理论，结合实际工程经验，对这类系统的可靠性分析提出了一种新的方法。

As a type of complicated information system, E-government system is usually made up of many subsystems which be dealt by different security strategies, be distributed in geography, belong to different departments, their systemic users can be active in many systems in the same time. There are great capacity resource and user info in each subsystems. Therefore, E-government system is faced with validity, utility, dynamics, distributivity, real-time nature and compatibility etc. challenges in access control technology aspect.

电子政务系统作为一类复杂的信息系统，通常由多个应用着不同的安全策略、地理上分布的、分属不同部门的、多用户同时在线的子系统组成，各系统内部存在越来越多的海量资源和用户信息，因此电子政务系统在访问控制技术方面面临着有效性、应用性、动态性、分布性、实时性、兼容性等严峻挑战。

Analyzing and simulating of the deformation law of the ceramic downspout product after overcoming the shortage of powder material models in the software of MSC. MARC. It shows out the important effects of various factors and the shape of mandril during the process. And it is obvious that the shape of the top mandril has more effects on the process than the bottom.(3) Showing out the important effects of model figure on the flowing of powder and the forming of low-density fields from the analysis. After changing the top of the mandril into spherical shape, an improving model is putting out so that the distribution of stress and strain turns to be even and proper and that the flow rule of powder grains is better.(4) Calculating of the dimensional precision and the cutting ratio of the product and analyzing of the effects of such factors as rubber aging, loading process, mandril, friction etc. on the cutting ratio.

MARC存在的粉末材料模型方面的设计缺陷后，对连铸水口粉末成形件的变形规律及影响因素作用进行了模拟分析，指出芯棒形状对成形件的变形有较大影响，并且芯棒顶部形状与芯棒底部形状相比，对粉末变形有更大影响；(3)分析了成形件出现低密度区域的原因，指出模具形状对粉末流动以及粉末成形件低密度区域的形成有重要作用，提出了密度分布优化改进模型：改进模具顶部形状，并将芯棒顶部设计成球面后，粉末成形件顶部区域的应力、应变分布更加均匀、合理，粉体颗粒流动情况明显改善，低密度区域明显缩小；(4)计算了成形件的尺寸精度及切削率，并指出除模具形状的影响外，充填密度、橡胶模具老化、加载工艺等其他因素对总体切削率也有相当的影响。

Vertically, slop-moving turbidity fans are located on the location where the middle term base levels transformed from rising stage to falling stage. On the plane, the slop-moving fans are distributed in the downthrow of depositional faults and the palaeogeomorphological lowlands between these faults.

该类扇体的分布主要受基准面旋回变化、同生断裂及沉积古地貌等因素所控制，垂向上主要位于中期基准面由下降到上升的转换位置，平面上要分布于同生断层下降盘及其之间的古地貌低洼处。

To research into the distribution of laser spot on the sea surface of airborne laser bathymetric system, to obtain the relationship between its spacing and scan mode, scan driver rate, laser frequency and plane speed, and to optimize its distribution are important.

通过对激光测深仪的激光海面入射点分布的研究，得到了其疏密程度与扫描方式、扫描电机转速、激光器重复频率和飞机飞行速度等参量之间的关系，并对激光海面入射点分布进行了优化设计。

Using air dustfall data and samples at background sites, the quantity of dustfall, distribution scope, chemical composition and grain distribution characteristics, etc.

使用降尘背景观测点的大气降尘资料和样品，统计、分析和研究了沙尘暴降尘在各地区的沉降量、分布范围、化学组分和粒度分布特征等问题。

Using air dustfall data and samples at background sites, the quantity of dustfall, distribution scope, chemical composition and grain distribution characteristics, etc. of sand storm deposition at different areas were analyzed.

使用降尘背景观测点的大气降尘资料和样品，统计、分析和研究了沙尘暴降尘在各地区的沉降量、分布范围、化学组分和粒度分布特征等问题。

According to the relation of the heat capacity, the thermal conductivity, the thermal expansion coefficient and the elastic modulus of the laser medium, the distribution and the variation of the temperature and the thermal stress in laser medium were got.

考虑热容值、热导率、热膨胀系数和弹性模量等与温度的关系，得到激光介质的温度分布和变化，以及热应力的分布和变化。

With the elastic strain energy increased, the arrangement orientation increased, from spherical-shaped precipitates to elliptical plate.

随共格畸变能的增大，沉淀相分布的取向性越来越明显，由原来离散分布的等轴粒子状向椭片状转变。

The transport and current-voltage properties of submicron GaAs MESFET device are calculated firstly based on the nonparabolic effective mass energy band model and Monte Carlo method which includes all major scattering mechanisms. The electron drift velocity, electric field and the non-homogeneity of mobility distribution in device are obtained. The influences of different gate lengths to electron drift velocity and drain current are analyzed.

根据对以GaAs、GaP和InP为主的Ⅲ-V族化合物半导体材料的能带结构和散射机制的分析，采用蒙特卡罗模拟方法，研究了亚微米尺寸的OaAs MESFET器件的电子密度分布、电场强度、漂移速度和迁移率分布等输运性质，以及栅长对器件性质的影响和电流电压特性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。