连续波

The effect of metallic pit prop on transmission characteristics in tunnel is studied.

针对矩形巷道中由于金属支护立柱的存在而带来的分叉不连续问题，提出用分叉波导模型并用模式匹配法和多模传输理论分析传输特性。

A fork waveguide model is proposed and the mode matching and multi-mode network technique are used to analyze the transmission characteristics of rectangular tunnel with metallic pit prop.

针对矩形巷道中由于金属支护立柱的存在而带来的分叉不连续问题，提出用分叉波导模型并用模式匹配法和多模传输理论分析传输特性。

A fork waveguide model is proposed and the mode matching and multi-mode network technique are used to analyze the transmission characteristics of rectangular tunnel with metallic pit prop.

针对矩形巷道中由于金属支护立柱的存在而带来的分叉不连续问题，提出用分叉波导模型并用模式匹配法和多模传榆理论分析传榆特性。

In this paper, the profile along the line focus is simulated and analyzed in details based on the principle of physical optics.

随时改变能动反射镜形状以调制波面位相，能将入射激光束变换成辐照均匀、长度在一定范围内连续可调的焦线。

This invention relates to a method and device for generating cold atomic beam. Said method includes heating hot atom source in vacuum chamber to form atomic saturated vapor pressure atmosphere, cooling hot atom by three-D MOT to below 200uk and trapped to form cold atomic cloud, by the quarter wave plate reflection mirror in MOT the laser radiation pressure being unbalanced to make cold atom emitting along said direction, four tape arranged straight line set with contrary current direction is set in atom beam emission direction, which makes the atom emitted to forward to obtain cold atom beam with low speed, large flux and small transverse speed, laser beam vertical with atom beam set in the direction of cold atom emitting for atom beam state preparation to realize state concordant emitted cold atom beam.

本发明涉及一种冷原子束产生方法和装置，该方法包括在抽真空的真空室内，加热热原子源，在真空室中形成相应的原子饱和蒸汽压气氛；采用三维MOT对热原子进行冷却，冷却到200μk以下，并被捕获形成冷原子云团；通过三维MOT中开小孔的四分之一波片反射镜，而使得在该方向上激光辐射压力不平衡，使冷原子沿此方向出射；在冷原子束出射方向上，还置有载有彼此电流方向相反的四根成锥形排列的直导线，从而原子出射时将在磁场的作用下，不会沿横向膨胀而向前射出；便得到了出射速度低的、通量较大的、横向速度非常小的连续冷原子束；同时在冷原子束的出射方向上，设置有与原子束垂直的激光束，用于原子束的态制备，实现态一致的出射冷原子束。

On this basis, the seismic response analysis of a three-span continuous middle-supported steel arch bridge with a main span of 428m is conducted under different input conditions of uniform excitation, traveling wave excitation and multi-excitation.

在此基础上分别考察了一座主跨428m的三跨连续中承式钢拱桥在一致激励、行波激励和多点激励下的地震反应规律。

A new single-wire capacitance probe with a high sensitivity of 1.52 pF/mm was used to measure water layer height in oil-water two-phase flows in horizontal pipes.

利用一种单丝电容探针，对水平管内机油-水两相流的水相高度进行测量。实验中油、水相折算速度分别为0~0.2 m/s和0~0.8 m/s，覆盖了水为连续相的全部流态：包括波状分层流、三层流、水包油/水和水包油4种流型。

Plate concept: the concept of commercial chain of technical points: this column in the August 20 transaction that is found in the unit, and a continuous Co MM ent, followed by a wave of self-completion of the Unit 7 yuan to 10 yuan fast pulled up.

板块概念：商业连锁概念技术面看点：本栏在8月20日即发现了该股的异动并连续点评，随后该股完成一波自7元多至10元以上的快速拉升。

He went through a similar stretch last August, when he had a winless drought of nine games before rebounding to win three straight in the tail end of the season.

他去年八月有类似的状况，在季末连续赢得三场之前，有一波九连不胜的状况。

And the young wizard does his magic for a third week; Harry Potter and the Sorcerer's Stone is number one.

在小男巫的魔力下，《哈利·波特与魔法石》已是连续三周蝉联冠军了。

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。