时轴

In this thesis, the mathematic model of servo system is set up, the contour error in straight line and circular interpolation movement on the duplex servo-system is analyzed, and the method to raise the contour accuracy of the movement track is put forward.

本论文建立了数控伺服进给系统的数学模型，对双轴进给系统在作直线和圆弧插补运动时形成的轮廓误差进行了数学分析，并指出了提高试验台运动轨迹轮廓精度的方法。

So in the design process to be considered when the above conditions, enhance the performance of the shaft.

因此在设计工艺时需考虑到以上的工况情况，提高该轴的综合性能。

Focusing properties of elegant cosh square Gaussian and Sinh square Gaussian beams through a thin lens are studied in detail. And intensity distribution on the axis and focusing intensity distribution are analyzed. Also focal shift of Sinh square Gaussian beams are studied.

详细研究了复宗量双曲余弦平方-高斯光束和双曲正弦平方-高斯光束通过薄透镜时的聚焦特性，分析了光束的轴上光强分布和聚焦场的光强分布，讨论了双曲正弦平方-高斯光束的焦移。

Panicle open, 10–30 cm; branches in distant whorls, capillary, flexuous, 5–15 cm, mostly unbranched, tipped by a raceme; racemes 2–5-noded with 7–13 spikelets, sometimes branched with up to 40 spikelets, disarticulating at maturity, one spikelet of a pair sessile, the other pedicellate; rachis internodes and pedicels slenderly clavate, margins ciliate, hairs 0.7–1 mm. Spikelets 4.5–5 mm; callus hairs ca. 1 mm; lower glume lanceolate, thinly pilose, veins smooth below middle, scaberulous above, apex acuminate; upper glume ciliate on margins, acuminate or emarginate and mucronate; lower floret sterile, palea reduced; upper lemma 2-lobed to middle; awn 5.5–8 mm.

圆锥花序打开，10-30厘米；在远轮生方面的分枝，发状，，5-15厘米，多数不分枝，被总状花序端部； 7-13小穗2-5有节具的总状花序，40小穗的有时分枝具可达，成熟时脱节，一对无梗，另一个的一小穗；棍棒状的轴节间和花梗slenderly，边缘具缘毛，头发0.7-1毫米小穗4.5-5毫米；胼胝体毛约1毫米；披针形，稀疏具柔毛的下部的颖片，脉平滑的中间以下，在上面微糙，先端渐尖；在边缘上具缘毛的上面颖片，渐尖的或微缺和短尖；不育的下部小花，退化的内稃；上面外稃2裂的至中部；芒5.5-8毫米花粉囊2-3毫米。

All these are the trigger mechanism of the severe convection and the squall line weather process. The strong instability of low level, the outbreak of low level jet and the core of the LLJ moving southeastward quickly, convective available potential energy and vertical helicity high center are indicative to the strong convection weather.

强对流发生时，该地区出现的低空增温增湿、低空急流的爆发及低层急流核向东南快传、高空急流轴稳定在强对流天气发生地上空，对流有效位能积累和释放随时间的演变过程及垂直螺旋度大值中心等都对此次强对流天气过程有很好的指示意义。

For SOV energized to counterclockwise drive shaft ro- tation, please rearrange the direction of piston as

电磁阀励磁使输出轴向左回转时，活塞的齿条部分应重新安装在齿轮轴的另一侧。

Based on the research on the scattering of the Gaussian beam from single sphere, the intensity distributions of LGB beam in different propagation distance is analyzed. Without considering the relationship of scattering and phase shift, the beam coefficients is gained by the solution of scattering cross section, and the LGB is expanded in terms of the vector spherical harmonics as fundamental Gaussian beam. The scattering of the beam with orbital angular momentum from single sphere located on the propagation axis is studied.

在单体球粒子对高斯光束散射研究的基础上，分析了在自由空间不同传输距离LGB光束的光强分布情况，在不考虑散射和波束相移关系的情况下，将LGB作为入射高斯光束，通过对波束入射时的散射衰减截面求解得到波束因子，利用矢量球谐函数对入射高斯波束进行展开，从而研究了单球粒子在在轴条件下对具轨道角动量高斯波束入射的散射问题。

It involves a spherical primary mirror and the secondary mirror with profile given by computer.lt is not necessary for the new optical system to obtain the on-axis solar image,so the secondary mirror may have a simpler profile.

一种由球面主镜和由计算机算出曲面型线的二次镜组成的新型二次反射聚光系统，可以减少制造困难，当这种光学系统用于太阳能聚光器时，由于不需要得到轴上的太阳像，其二次镜型线可更为简单。

And the proposed methods for accurate analysis on optoelectronic performances of tilted square metallic mesh provide a key theoretical basis for electromagnetic shielding of curved optical windows with high performance.

同时，本文提出的金属网栅倾斜于光轴时的光电特性精确分析方法，为曲面光学窗的高性能电磁屏蔽奠定了理论基础。

The stereographical examination of surface spread chromosomes revealed that stretched chromosomes were composed of a mass of twisted looping fibers with an average diameter of about 300 A.

在染色质纤维未完全展开排列紧密时，染色体臂的染色质纤维，缠绕排列有序，垂直于染色体纵轴，螺旋盘绕形成疏密程度不同的横纹。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷