The experimental results indicated that, an even clad layer free of cracks and better binding with the substrate can be attained under the processing conditions of laser power P=2 kW; scanning velocity v=3 mm/s; beam diameter d=3 mm; SiC powder precoating thickness is 1 mm or p...
试验结果表明，在激光功率P=2kW、光斑直径d=3mm、扫描速度v=3mms/工艺条件下，预置SiC粉末厚度1mm或送粉量mp=8gm/in，可以获得表面平、无裂和界面结合较好的熔覆层。
Under the same incident intensity, the intensity of the blue beam at the corresponding position of the output image increases with the increase of velocity of the input image.
在相同的入射光情况下，对于输出图像的相同位置，输入图像的运动速度越大，其输出的蓝光光强越大。
The differential equation of system was presented based on the assumption method and changing tendencies of the critical velocity for the flutter with both the gap and the thickness of the beam were discussed.
采用假设模态法建立刚性水槽内多跨板状梁结构在轴向流体中的运动微分方程，分析系统的颤振临界流速随间隙和板厚的变化规律。
Finally, based on the theory of Timoshenko beam, a beam model of this crankshaft is built, which is compared with solid model. The results indicate that this beam model can meet the needs of calculation precision and calculation efficiency. With this beam model, the condition in which real loads are put on the crankshaft is simulated. The displacement curves、velocity curves、acceleration curves of the main journals and the pulley of this crankshaft and torsion vibration curve of the pulley are then gained. With these curves, the dynamic characteristic of the crankshaft is analyzed. The conclusion indicates that this crankshaft has good dynamic characteristic.
最后利用Timoshenko梁理论建立了曲轴的梁单元模型，将此梁单元模型与体单元模型进行了比较，结果表明梁单元模型能够满足精确度和计算效率的要求；利用该梁单元模型，模拟了实际条件下的载荷作用时曲轴的响应，得到了曲轴各主轴颈和皮带轮端的位移、速度、加速度曲线以及皮带轮端的扭转振动曲线，分析了曲轴的动态特性，结论表明该型曲轴具有良好的动态特性。
A closed form for the velocity and deformation of the beam was obtained.
最后给出了任意时刻梁的运动状态和变形状态的解析表达式。
Also, the influence to the tracking velocity and tracking precision of the system brought by the different size of laser beam, the relative location relationship between the laser beam and the detector, and the laser intensity distribution are discussed.
对于极窄的激光束(10-6~ 10-3 rad量级)和极远的传输距离(如地球至同步轨道上航天器的通信距离可达40 000 km以上)，要实现稳定的对准十分困难，这需要由专门的空间光束捕获、对准、跟踪技术和系统来完成[1]。
In Chapter 2, the progresses about laser cooling and trapping neutral atoms in each period of time are summarized, including slowing atomic beam, Doppler cooling, magneto-optical trap, Sisyphus cooling, polarization gradient cooling, velocity selective coherent population trapping, Raman cooling and so on. The hot topic in laser cooling, Bose-Einstein condensation is also mentioned. In Chapter 3, the progress we made on laser cooling of neutral atoms by red-shifted diffuse light in an optical integral sphere cavity is presented.
主要内容包括在二、三、四这三章内：第二章概述了激光冷却和捕陷中性原子领域各个发展阶段成果，其中包括：原子束的减速，多普勒冷却，磁光陷阱，西西弗斯冷却，偏振梯度冷却，速度选择的布居数囚禁冷却和喇曼冷却以及各种囚禁原子的陷阱，还介绍了最近在原子冷却领域非常热门的话题-玻色-爱因斯坦凝聚。
The effects of beam power density, scanning velocity, temperature of substrates and the construction of samples on the quality of the monocrystalline silicon films were discussed.
采用籽晶液相外延形成单晶硅薄膜。本实验的重点在于摸索电子束的功率密度、扫描速度、衬底的温度和样品结构等因素对形成单晶硅薄膜质量的影响。
The acquired results show that there are distinct differences between two beam models: with constant moving velocity and accelerated moving velocity.
研究表明，质量块分别在匀速和加速移动时，简支梁的动态响应存在显著差别。
The characteristics of the electron beam confined by the PPM stack are analyzed and the effects of the peak magnetic flux density, magnetic tapering, initial transversal velocity distribution are mainly discussed.
分析了周期永磁系统聚焦电子注传输特性，并重点讨论了磁场强度、磁场端部效应和横向速度分布对电子注聚焦性能的影响。
Based on the software ADAMS, the models of three-dimensional vehicle, three-dimensional corrugated beam barrier and curb were built. Collision simulation experiments of different collision angle and velocity were done.
基于ADAMS软件建立了适合护栏碰撞仿真试验的三维汽车模型、三维波型梁护栏模型、路缘石模型，进行了不同碰撞角度和速度的碰撞仿真试验。
Characteristics of the excitation are determined by many factors, including velocity, relaxation characters of electron beam, the frequency of excited waves, and the density of background plasma.
影响辐射特性的因素很多，调制电子束的弛豫长度是其中一个重要因素，本文研究了呈指数衰减的调制电子束弛豫长度对电子束产生的哨声波辐射特性的影响。
The scanning angular scope is mainly determined by the azimuth width of the terrain patch, nominal slant range, squint angle, platform velocity, and azimuth beam width.
天线扫描角度范围由要求的成像区方位宽度、斜距、斜视角、载机速度和波束方位宽度决定。
The velocity of electron has the offset due to space charge of intense electron beam.
由于强流电子束自身产生的空间电荷场，使得电子束的速度离散，增加了电子束温度，降低了冷却效率。
The distribution of electron beam velocity ratio and velocity spread on axis was discussed, and the effects of the anode voltage on electron beam performance was studied.
给出了电子束速度比、速度零散沿轴线的分布，进而讨论了阳极电压对电子束性能的影响，结果表明选择适当的阳极电压和阴极磁场对得到好的电子束参量作用明显。
To utilize the interaction between the field and the electron beam in a traveling wave tube, the velocity of electrons and the longitudinal phase velocity of field should be made approximately equal. But when the electromagnetic energy increases, the electrons are slowed down and the synchronization condition is no longer satisfied in periodic structures.
由于行波管的工作依赖于其慢波系统中的电子注与沿轴传输交变电磁场之间的相互作用而完成，而这样的相互作用要求沿轴传输的交变电磁场必须与电子注有着近乎同步的速度，所以慢波系统内的同步问题就成了研究行波管的一个很重要的问题。
To utilize the interaction between the field and the electron beam in a traveling wave tube, the velocity of electrons and the longitudinal phase velocity of field should be made approximately equal. But while the electromagnetic energy increases, the electrons are slowed down and the synchronization condition is no longer satisfied in periodic structures.
由于行波管的工作依赖于其慢波系统中的电子注与沿轴传输交变电磁场之间的相互作用而完成，而这样的相互作用要求沿轴传输的交变电磁场必须与电子注有着近乎同步的速度，所以慢波系统内的同步问题就成了研究行波管的一个很重要的问题。
An improved model of fixed beam s has been used to analyze the stability and parametric vibration of a moving belt subjected to variations of the velocity of the belt for the first time.
首次将传动带改进为固支梁模型，研究了传动带由于带速的周期波动而产生的参数振动并确定了振动的稳定域。
As the moving particles pass through the region, according to the double light beam double scattering heterodyne principle, frequency information corresponding to the two-dimensional velocity components are got by two laser testers.
当运动微粒通过测量区时，根据双光束双散射外差原理，由两个激光检测器获得二维速度分量所对应的频率信息。
There exists the gradient distribution of radial electron velocity due to space charge effect of intense electron beam, and this influences significantly the cooling efficiency.
通过求解电子冷却系统中冷却段漂移管区的强流电子束产生的空间电荷场，研究了电子束空间电荷效应对电子温升的影响。