长度

Firstly, This paper processes geometry filtration based on character of orbit's apogee and perigee after orbit model is analyzed and based. Secondly Space Debris is separated into two kinds, coplanar and not coplanar according as location interrelation of target and debris. In Dynamic filtration's processing, considering prediction time limit and orbit perturbation, secular effects which have increaser effect is considered so that some need catching danger time point is appeased, some law about time when target and debris pass intersectant line each other is inferred, when debris and object are in different plane and some similar law also is inferred otherwise. The time list is arithmetical progression. These laws can improve calculation efficiency remarkably; Lastly orbit predict is a course approaching least distance. Danger time point in the last step become beginning time point from which debris and object's position and velocity are calculated by SXP4 Model which is an analytic model.By result, determine that relative movement trend is closer or apart, farther calculate the interval apart from time when predictive least relative distance occurs. Least relative distance and time when least distance occurs is calculated finally. It is a fast approach course adopting varied interval.

本文在分析、建立轨道摄动计算模型的基础上，首先采用基于轨道远、近地点特征对大量编目在册的空间碎片进行初步几何静态筛选，然后根据碎片与目标轨道面的相对位置特点把碎片分为异面与准共面两种情况以进行动态筛选，在筛选过程中考虑到预报时限长度和轨道摄动影响，引入了轨道摄动中具有积累效应的长期项以满足危险时间点的捕捉要求，利用了长期项摄动变化线性的特点导出了碎片与目标异面情况下各自过交线的时间序列成准等差数列的规律性和准共面情况下类似的规律性，从而显著地提高了前期轨道筛选的计算效率；最后对剩余危险碎片和目标飞行器利用SXP4轨道预报模型在前期轨道筛选的基础上以各个危险探测时间点为预报的时间起点，并根据预报计算结果，分析目标和碎片在该时间点的运动趋势是相互远离还是相互接近，推出预计最小相对距离发生时刻相对此刻的时间长度，得到其随时间变化的局部最小相对距离以及危险距离发生的时刻和相对速度，这是一个采用变时间步长、快速逼近最小相对距离的过程。

Set tab = 8 spaces we indent by 4 spaces per indention level, and our tabs are 8 spaces long

设定tab = 8 spaces （每缩进层次缩进4个空格长度，我们的tabs就是8个空格的长度

contraction length of 103 cm, elongated length of 140 centimeters after the outer tube diameter of 25 cm, inner tube diameter of 22 centimeters.

收缩后长度是103厘米，拉长后的长度是140厘米，外管直径25厘米，内管直径22厘米。

Your inseam measurement is basically the length from your crotch to the floor.

Inseam长度的量测方法是从您的会阴到地板的长度。

When a length is included, it specifies the -minimum- length of the interpolated formatting.

如果指定了长度值，它指定的是被替代格式的最小长度。

The uncertainties for verifying all kinds of abraded straight rulers with different length on interferential installation with isoclinic circle fringe by two kinds plane optical bars were evaluated in this paper. Among the uncertainty evaluations, the situation of subsection also was evaluated.

摘 要：对不同长度的研磨平尺用两种不同长度长平晶在等倾干涉装置上检定的不确定度进行了评定，其中包括分段法不够一整段时的评定。

The simulation results by applying zero-equation model are compared with those by adopting Prandtl mixing length theory and K-ε two equation model.

研究表明，总体来说Prandtl的混合长度理论能够获得比Chen的零方程模型更好的结果；从这两种零方程模型的构造分析，Prandtl混合长度理论较为合理，但Chen的零方程模型更容易收敛。

Through the analysis of five calculation methods of shear velocity and roughness length (Z0), choose Kerman Prandtl method and log-parabola method as the methods to calculate shear velocity and roughness length.

本文通过对5种计算摩阻流速u*及粗糙长度Z0的方法分析研究，选择卡曼-普朗特方法和对数抛物方法作为本文计算摩阻流速和粗糙长度的方法。

At the same time, the lengths of key and signature were unrelated to the number of group members.

同时，密钥的长度及签名的长度与群成员的多少无关。

The number corresponds with the length of the packet, so for now I'll label the two-byte field as the length field.

我猜这 2 个字节(unknown1 和 unknown2)应该是代表数据包的长度的，所以我把这个域称为长度域。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。