查询词典 beam bridge

There is no any additional phase modulation on the shaped beam when a LCOS is used as the beam shaper. A Garssian beam has successfully been converted to a square flattop super-Gaussian beam by use of a LCOS. The results show that the LCOS of...

研究发现，与透射式液晶光阀相比，反射式液晶光阀有着明显的优势，效率达到42%，远远优于透射式液晶光阀10%的效率，从而能够实现系统的大幅度简化，是一种非常有潜力的空间光调制器件。

In order to accurately analyze the differences on load carrying ability among laminated beam , laminated beam with wedges and beam as a whole of the same dimension,this paper sets up a model of flection of laminated beam s with rectangular cross section by taking advantage of Winkle s foundation assumption method and electric testing technique.

为了精确分析叠梁、加楔块叠梁和整梁的承载能力，采用温克尔假设法和电测实验技术，完成了矩形截面叠梁受力弯曲时的模型简化理论计算与实测分析。

The results show that due to the effect of laser beam quality on focal beam waist radius,focal angle and focal length,laser beam quality decides the beam focusing ability and the processing capacity of laser system.

结果表明，光束质量对聚焦光束的焦斑、聚焦角和焦深的影响不仅体现了激光源的可聚焦性，而且也标志了激光源的可加工能力，这是聚焦系统和焦点位置在选择过程中应该考虑的重要因素。

It's M2 factor is approaching the ideal value 1 and the beam intensity profile remains Gauss Profile. Laser beam with good propagation and focus characters. The beam can propagate a long way and can be focused with lens with long focal distance. The focal beam waist radius is 134μm, the focal distanced of the focus lens is 300mm. It's focal depth is about 5mm and the focal shift is about 1mm in the range of processing (3m).

结果表明，Slab CO2激光器具有高光束质量，其M2因子非常接近1的理想值；激光束具有良好的传输和聚焦性能，可以长距离传输；使用焦距为300mm的聚焦镜聚焦，聚焦光斑的束腰半径约为134μm，光束横截面能量分布接近理想的高斯分布，焦深约为5mm，在加工范围内(3m)，激光束的焦点漂移量大约为1mm。

The endplate bolted SC beam and CCSHRC column joint and the bar passing force's joint of SC beam and CCSHRC column are the same with SC beam and CCSHRC column structure system, the bar passing force's joint of SC beam and CCSHRC column is audacious innovation of joint types.

端板螺栓连接的组合梁、连续复合螺旋箍混凝土柱节点和连接钢筋传力的组合梁、连续复合螺旋箍混凝土柱节点就是适用于这种体系的节点类型。其中连接钢筋传力的组合梁、连续复合螺旋箍混凝土柱节点更是节点类型中的大胆创新。

So the main study contents of this thesis are as follows: the load distribution pattern along the length beam and the cross beam in the place of node、 the appropriate matching rigidity of the length and cross beams in the action of same anchorage force and the affection pattern discuss on sloping surfaces dip angle、 beam rigidity 、 anchor-rope angle as well as the position of load which affect the load distribution ratio on length and cross beams. In the end it brings forward lattice beam internal force calculated method on the basis of double parameter groundsill model.

鉴于此，本文主要的研究内容是格构梁节点处荷载沿纵横梁的分配规律、同一锚固力作用下纵横梁合理的匹配刚度以及对格构梁纵横梁荷载分配比值可能存在影响的坡面倾角、梁刚度、锚索夹角、加载位置等因素的影响规律探讨，最后提出基于双参数地基模型的格构梁内力计算方法。

They require well collimated light beam. For this, we introduced collimator. The collimator is used for collimating emanative Gaussian beam to obtain almost parallel beam with small emanative angle, or focusing parallel beam into fiber.

在光隔离器、光环形器、光开关、光衰减器、光波分复用器等光器件的工作过程中，对高斯光束的准直性要求非常高，这样就引入了光纤准直器。

In the part of the vibration experiments and analysis, firstly, used the simple-beam theory to estimate the natural frequency of the beam of the 20-headed computerized embroidery machine.secondly, measured the beam of its low rank natural frequency, the beams horizontal vibrating acceleration amplitude, speed amplitude and the displacement amplitude in different rev and different turn parts. Found that it is sympathetic vibration, which bring on the thread-broken rate rise rapidly. On this base, established the finite element analysis modle of the vibrating beam, and took on hamonic analysis and modal analysis with the mold. The rusult of test and analysis offer the basis for farther improvement of the computerized embroidery machine.

振动分析部分，首先由简单梁理论出发，对横梁的固有频率进行估算；接着通过测振仪器对20头电脑刺绣机横梁进行了试验模态分析和不同工况振动测试；获得了横梁前四阶固有频率和模态振型，以及在不同工作转速、不同回转部件下横梁振动的加速度幅值、速度幅值和位移幅值；找到了横梁振动加剧的原因——共振；在此基础上建立了符合实际情况的横梁有限元模型，对模型进行了模态和谐响应计算，证实了模型的可靠性，为下一步的改进设计提供了依据。

The second is a multi-beam structure, such as the use of cusp-type trencher Australia's seeder Wudaoliang general, beam and beam of about 1m apart about ditching devices were arranged in a different beam.

二是采用多梁结构，如澳大利亚采用尖角型开沟器的播种机一般有五道梁，梁与梁相距约1m左右，开沟器分别布置在不同的梁上。

By utilizing the unitary matrix, the transmitter decouples the input signal into spatial orthogonal beam directions with the matched filters in beam directions in the receiver, and the gain obtained by each data block can be equivalent to the sum of the projection from the channel matrix to the corresponding beam directions. Beam selection is adopted to maximize the minimum gains of all the blocks, which can improve the system diversity gain efficiently.

发射端采用酉矩阵将数据映射到空间正交的波束方向上，通过接收端波束方向上的匹配滤波，各数据分块所获得的增益为信道矩阵在其波束方向上的投影之和，波束选择通过最大化所有数据分块最小增益，从而有效地提高了系统的分集增益。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。