查询词典 space plane

Secondly, the isolation of plane P and S waves by using a row of rigid or elastic piles as a barrier is investigated in a homogeneous unbounded space.

其次，分别采用刚性和弹性排桩作为屏障，对全空间饱和土中排桩对平面纵波和横波的隔离问题进行了研究。

Furthermore, you must keep your feet stowed directly in front of you at all times in such a way that your legs do not touch my legs or penetrate any part of the imaginary vertical plane separating your seating space from mine.

还有，保证管好你的脚，随时保持并拢的状态；别绊着我，也不要幻想通过飞机上一个虚无的垂直点还抢我的地方。

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。

Firstly a proper unstable linear system satisfied shilnikoc inequation is selected. Then shift transformations of the linear system are implemented and the phase space is divided into several parts by a series of cross-plane. Finally the needed multi-scroll piecewise linear chaotic system is constructed.

首先选取满足Shilnikov不等式的不稳定线性系统，然后对该系统进行平移变换，并以相交平面为分界而对相平而进行划分，最后得到所需的多涡卷分段线性混沌系统。

As to the space curve coils the arbitray right line and circles to obtain the rotational surface ∑, the body of rotational through ∑ s surround into(the part sealing off does not put the back plane disc), the integration formula about area of rotational surface and volume of the body of rotation are given by using coordinate transformation and Infinitesimal method.

利用坐标变换与微元法得到了空间曲线绕任一直线旋转所得旋转曲面∑的面积公式，以及由∑所围旋转体的体积公

In the third chapter, it is proved that a Minkowski plane withπ/2-property, whose unit circle is Radon curve, is an inner product space.

在第三章中，本文证明了单位圆是Radon曲线且具有π/2性质的空间是内积空间。

In this paper,it is proved that a Minkowski plane with π/2-property,whose unit circle is Radon curve,is an inner product space .

证明了单位圆是Radon曲线，且具有π/2性质的M inkowski平面，是内积空间

Based on the Guldin's first theorem, it was deduced that the general formula to calculate the rotating surface area which is shaped by rotating the curve Г in a plane around the L-axis in the space by using curve integral.

依据古鲁金第一定理推证，得到利用曲线积分计算空间某一平面上的曲线Г绕直线L旋转而成的旋转曲面面积的通用公式；利用曲线积分计算xoy面上的曲线c绕直线L旋转而成的旋转曲面面积的通用公式。

Definition 2:line,plane,interspace call 1-degree space.

定义2：线，平面，立体空间，叫做1度空间。

Proposed a representation scheme for 3D face -- Surface UnfoldingFor its irregular sampling in 3D space, 3D face surface cannot be processed by many orthogonal and subspace analysis toolkits directly, i.e. DFT, DCT, PCA, LCA. Surface Unfolding projects the 3D face to a 2D plane while retaining its intrinsic geometry properties of angle and area which issues a surface representation — Unfolded Image.

提出了一个三维人脸的平面表征方法——曲面开折模型不同于传统的数字生物特征，3D人脸数据是非规则采样的，传统的信号处理工具难以对3D数据进行直接处理。

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。