查询词典 fish beam

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。

The mutual connection that analyses Bessel beam of light and Bessel-Gauss beam of light theoretically reachs distinction, beam of light of Bessel of numeric imitate ideal and Bessel-Gauss beam of light are in the radial light intensity of aleatoric plane distributings, and the influence that smooth waist radius and syntonic antrum antrum grow pair of output Bessel-Gauss beam of light.

梗概： 理论分析Bessel光束和Bessel-Gauss光束的相互联系及区别，数值模拟理想Bessel光束和Bessel-Gauss光束在任意平面的径向光强分布，以及光腰半径和谐振腔腔长对输出Bessel-Gauss光束的影响。

The device includes a beam; at least one beam support mounted on the beam; a sensor assembly slidably connected to said beam and adapted for measuring the distance to the surface; and a transducer assembly adapted for measuring the position of said sensor assembly along said beam.

该装置包括：梁；至少一个梁支撑件，其安装在所述梁上；传感器组件，其与所述梁可滑动地连接并且适合于测量与所述表面的距离；以及变换器组件，其适合于测量所述传感器组件沿着所述梁的位置。

Based on the differences between the design value and the survey of the bridge deck elevation in constructing the pre-stressed and so on working condition, the model parameters are identified by ANN, and the beam camber of different sections are given. The results demonstrated that the ANN is efficient and the theoretical results fit well with that of forecasting the beam camber in construction.In this thesis, aim to the beam axis shape be exactitude for design, the internal force of the beam be appeased by design request, the concept of modem cybernetics is applied, At the same time, the effecting parameter has collected. The paper build the ANN model in predicting the beam camber an construction and discuss indetail the extraction of inputting nodes information when quoting the fundamental principle of ANN model and introducing research process of the improved BNN. According to them, ANN is applied in the construction control of prestressed concrete continuous bridge. It is successful for used in the No. 4 bridge of Xiangfan bridge over-crossing Hanriver brideg. To predict the construction camber of by ANN method is useful and effective.

本文以大桥成桥线形满足设计要求和成桥内力控制在设计容许范围内为目的，运用现代控制理论的思想，引用神经网络基本原理，详细介绍BP神经网络的研究过程，从而建立预应力混凝土连续梁桥施工预拱度的神经网络模型，并详细讨论了模型的神经网络结点信息的提取，在工程实例的基础上进行了数值计武汉理工大学硕士学位论文算，数值表明，将神经网络应用于预应力混凝土连续梁桥施工控制，获得了满意的结果，在预应力混凝土连续梁桥施工控制技术研究方面，具有方便有效、精度高的优点，具有良好的应用前景。

This beam-beam effect was studied in previous colliders, where experience showed that one cannot increase the bunch density beyond a certain beam-beam limit to preserve a sufficiently long beam lifetime.

这种粒子束效应已经在以前的加速器中被研究过。实验表明，我们如果想使粒子束保存实验所需的更长的时间，粒子束的密度就不能超过一个极限。

It is composed of above two mircoprisms dislocated and closely arranged, each microprism has three all-reflecting surfaces, N microprisms change the light beam into N vertical closely-arranged light beam groups, the distance between the light beam groups can be controlled by the difference of optical distance of the light beam between the first and second reflecting surfaces of the two adjacent microprisms and after shaped, the light beam does not change the advancing direction.

本整形器是由两片以上棱镜错位紧密排列构成，每片微棱镜有三个全反射面，N片棱镜使得光束变成N个垂直紧密排列的光束组，光束间的距离可由相邻两棱镜的第一反射面和第二反射面间光束光程差控制，并且整形后光束不改变前进方向。

The point doses at the inferior beam edge for the two energies were 31.2% and 32.4%, respectively. There were 47-54% dose increase for superior beam edge and 37.6-35.2% dose decrease for inferior beam edge, as compared to the 50% field edge dose with the static dose distribution. There were 8.5 and 7.5 mm range increase for superior beam penumbras and 5.5 and 4.5 mm range increase for inferior beam penumbras, an important result corresponding to treatment volume.

结果：以正常人的平均值为例，在一个照射时距内，使用6 MV及18 MV光子射束， 10X10cm2照野10cm深度之中心轴下，照野上缘的剂量，分别为照野中心点剂量的73.5 %及77.2 %，照野下缘的剂量则分别为中心点剂量的31.2 %及 32.4 %，此剂量反映出因治疗中的呼吸位移，造成照野上缘较照野中心点有47 –54 %的剂量增加，及照野下缘有37.6 %- 35.2 %的剂量减少，相对照於静止态下照野边缘为中心点50 %剂量的状态。

At the same time, the finite staff element method is used to analyze the influence of beam rigidity; and the two new methods proposed are used to analyze the influence of connect way between piles and beam; and the conclusion is obtained that the rigidity ratio between beam and piles being 0.48 is appropriate; the continuative increase of the rigidity ratio is not significant; the worst condition is that connecting way between piles and beam is hinged; the best condition is that connecting way between piles and beam is rigid. Whether is single-row pile or are double-row piles, when the front of single-row pile or the front of the front-row pile(in the double-row piles) needed excavation, it is supposed to that ought to be carefulness to excavate, because it is that the engineering cost increased greatly.

同时，用有限杆单元法，对双排桩的连梁刚度和用文中提出的方法以桩梁连接方式进行了试验和理论分析得出如下结论：在满足不相互影响排桩间距的情况下，桩顶连梁与桩的刚度比不小于0.48是合适的，此时再增加连梁刚度无意义；桩梁连接为铰结时双排桩受力变形性质最差，刚结时受力变形性质最好；不论是单排桩还是双排桩，桩前和前排桩桩前土体需要开挖时应慎重，因为这种开挖对支护结构影响很大，造价增加很多；双排桩省钱，而且抵抗变形的能力强，值得在工程中研究和广泛应用

The vibration test is marked in different velocities to probe the effective way of the beam damping by changing the fixed type of the beam on two ends,setting up the curve beam with right angle to sustain the beam,and installing the rubber damper,so as to reduce the amplitude of the beam .

通过改变横梁两端固定方式，增设直角弯梁后撑横梁，加装横梁橡胶减振器等方法，在不同速度工况下进行振动测试，以减小横梁振动的幅值。

As the beam further propagation, self-reconstruction of the Bessel beam generated. The divergence of the self-reconstruction beam causes the beam intensity decreasing and the bright spot size increasing as the beam propagating.

当光束继续传播，贝塞尔光发生自重建(Self-reconstruction)，但重建的Bessel光将会发散，光强随着传播距离增大而迅速下降，且中心亮斑尺寸也迅速增大。

A small, rubber-headed hammer used in examination or diagnosis by percussion.

叩诊槌用在通过''。'振荡'。''所作的检查或诊断中的橡皮头的''。'小'。''槌

Affixes are limited in number in a language, and are generally classified into three subtypes, namely, prefix, suffix, and infix, depending on their position with reference to the root or stem of the word.

语言中词缀的数量总是有限的，根据它们跟词根或词干的相对位置，一般可以把词缀分外三小类：前缀，后缀和中缀。