平面度

The common method for obtaining the angle of the plane figure to projection plane is through the right-angled triangle method after getting the double-face projection of the plane figure on the basis of the conception of maximum oblique line.

求平面图形对投影面的倾角，通常需要知道平面图形的两面投影，利用最大斜度线的概念，通过直角三角形法求得。

Because Mars' axis of rotation isn't perpendicular to its orbital plane, but inclined at an angle of 24.936, it gives rise to the phenomenon of the seasons, as on Earth.

由于火星的旋转轴与其旋转平面并不是垂直的，而是倾斜的，斜度为 24.936 度，这导致了火星上的季节变化现象，这一点与地球是一样的。

This software package is of the following capabilities: top view display, line plot, net plot, surface plot, section analysis, background plane reduction, zoom, 1-D or 2-D Fourier transformation, power density analysis, restoration of STM images, smoothing, low pass or high pass filter, BMP file output, printing images etc.

STM图象是三维数字图象，考虑到其它自制仪器的需要，编写了通用三维图象处理软件，其中包括：黑白灰度、伪彩色顶视图显示，三维线形图、网格图显示，真三维立体图显示，剖面线分析，背景平面扣除和斜面校正，灰度直方图平坦化，卷积滤波边缘增强，选区放大和插值处理，一维、二维Fourier变换，功率谱分析，STM图象复原，噪声扣除和STM图象格式文件输出，打印等。

Then,the first order second moment theory in structural reliability analysis,i.e.,the checking point method was introduced to compute the two failure modes respectively,and two corresponding reliability i...

将两种失稳模式视为串联系统，由逐步等效平面法计算结构体系可靠度指标，最后由结构体系可靠度指标计算出该挡土墙稳定性的结构体系失效概率。

The merit of the invention are: 1 adopting free curved surface imaging method , three part reflection type Zernike polynomial free curved surface forms short focal distance bigger, relative apertures bigger fields of view angle imaging , rectifying optical aberration much better and its structure is simple; 2 adopting the reflection structure without optical lens, has removed the effect of various chromatic aberration , guarantee the imaging articulation; 3 adopt the design of short focal distance big fields of view angle, focal distance 8 - 15 mm, field of view angles 100 -135 degree, having 120 times multiplications under 250 mm imaging distance, having ultra-thin characteristic property; 4 adopting big relative apertures design ,the relative aperture is 2.0-2.4, having improved the illuminance of flat surface; 5 adopting image space telecentric imaging method , ensures that the image surface irradiance is homogeneous.

本发明的优点是：1采用自由曲面成像方法，三片反射式Zernike多项式自由曲面形成短焦距大相对孔径大视场角成像，更好地校正像差，结构简单；2采用无透镜形式的反射式结构，消除了各种色差影响，保证成像清晰度；3采用短焦距大视场角设计，焦距8～15mm，具有100～135度的视场角，在250mm成像距离下有120倍的放大倍数，具有超薄特性；4采用大相对孔径设计，相对孔径为2.0～2.4，提高像平面上的光照度；5采用像方远心成像方法，保证像面辐照度均匀。

Moreover,we also gave the proofs of generalization formula of integration by parts,the Green s formula of first type and the Green s formula of second type by using the divergence theorem .

首先指出数学分析中反映二重积分和第二类平面线积分联系的Green公式可以看成是散度定理的一种特殊情形，然后利用散度定理给出广义分部积分公式、第一Green公式和第二Green公式的证明

This algorithm can find all the optimal planer pseudoknots and some non-planer ones, but it is so high in time complexity.

该算法能得到最优平面假结结构和部分非平面假结结构，但算法的时间复杂度太高。

In Drsophila eye, PCP is evident in the coordinated orientation of ommatidia that rotate 90° in opposite directions in the dorsal and ventral halves of the eye during eye development. The key point for ommatidia to rotate correctly is the decision of R3/R4 fate that is controlled by PCP.

平面细胞极性在果蝇复眼的功能是在发育过程中协调位处背腹部的小眼各自旋转90度，使其依背腹轴形成镜像对称，而要使此过程有正确的旋转角度就要有正确的R3/R4细胞命运的选择，平面细胞极性的作用正是调控R3/R4细胞的选择。

By rescaling the system,we obtain the Lorenz-Stenflo system with slow variation of the flow rotation. Based on Routh-Hurwitz criteria,the stabilities of the equilibria are analyzed and the bifurcation sets are sought to divide the parameter plane into different regions,corresponding to different types of the solutions.

通过对系统的重新标度，得到了气流旋转缓慢变化时的Lorenz-Stenflo系统；基于Routh-Hurwitz准则，分析了平衡点的稳定性问题，得到了参数平面上的分岔集，这些分岔集将参数平面划分为不同的区域，在各个不同的区域对应于系统不同的解。

The great circle representing the apparent annual path of the sun; the plane of the Earth's orbit around the sun; makes an angle of about 23 degrees with the equator.

在地球上看到的太阳运行的轨道；地球绕着太阳转的平面；与赤道平面大致成度角。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。