查询词典 beam

In recent years, beam-shaping methods are rapidly developed which include beam collimating, beam-shaping and beam focusing.

近几年发展起来的一种耦合方案是整形耦合法，其包括光束准直、光束整形、光束聚焦三部分。

The mirror is applied in laser beam expand system, it can not only control the sending and incepting directions of the high energy laser beam accurately, and adjust the oblique high energy laser beam, but also can improve the beam quality by minishing the mirror thermal distortion.

本文介绍了一种应用于高能激光系统中的新型二维快速控制水冷反射镜，既可实现精确控制激光发射和接收光轴的方向，对光束整体倾斜方向进行校正，又可实现减小镜面热畸变提高光束质量的功能。

For the frame foundation beam with prestressed anchor cable on the linearly elastic Winkler foundation model, elastic two-constant foundation model and isotropic elastic half-space foundation model, the thesis puts up the finite element computation model which can consider the harmonious deformation of the beam and foundation and the influences between the prestressed anchor cables. The limit design idea of the cable foundation beam has been brought out, which can ensure the safety of the beam with the limit capability of the anchor cable. The computing procedure has been given and programmed.

给出了包括线弹性Winkler地基模型、双参数线弹性地基模型以及各向同性弹性半空间体地基模型上预应力锚索地梁有限元力学计算模型，该模型能同时考虑地梁与岩土体的协调变形，各锚索预应力之间的相互影响，并据此编制了计算程序；考虑到锚索地梁的工作特点，提出了锚索地梁的极限状态设计思想，在充分发挥锚索承载力的同时保证了地梁的安全，给出了其具体计算过程和有限元程序。

Compared with the result of plane wave, additional beam factor represents the effect of Gaussian beam, which is related to beam waist size, distance from beam waist to object center and the illuminated area on object, together with the incident or scattering angles.

与平面波解不同的是，在公式中引入了波束因子这一表征波束作用的重要参量，该参量与束腰半径、束腰中心与物体中心距离和物体照射面积以及入射、散射方向有关。

For DHS model, one beam can act as pump beam to supply energy for the other beam, which behaves as the signal beam.

对于后者，我们把提供能量的光束称为泵浦光，得到能量转移的光束称为信号光。

Hobbies: shopping, reading, swimming, and her little dog to play together; favorite color: pink; favorite food: mango; Idol: Podkopayeva (gymnasts of the former Soviet Union), Holguin Na; major achievements: 2003 Pan American Games champion on the balance beam, the third free-speaking, second runner-up on the uneven bars; 2005 Gymnastics World Championships women's balance beam, uneven bars gold medal, the women's individual all-around, speaking of free silver; the United States World Cup champion on the balance beam, uneven bars, sixth.2006 Gymnastics World Championships runner-up women's groups, the uneven bars runner-up; 2007 Gymnastics World Championships women's team title, the champion on the balance beam, uneven bars runner-up, fifth all-around.

业余爱好：逛街、读书、游泳、和她的小狗一起玩；最喜欢的颜色：粉色最喜欢的食物：芒果偶像：波德科帕耶娃、霍尔金娜主要成绩： 2003年泛美运动会平衡木冠军、自由操季军、高低杠季军； 2005年体操世锦赛女子平衡木、高低杠金牌、女子个人全能、自由操银牌；美国世界杯平衡木冠军、高低杠第六名； 2006年体操世锦赛女子团体亚军、高低杠亚军； 2007年体操世锦赛女子团体冠军、平衡木冠军、高低杠亚军、全能第五名。

The static and dynamic characteristics of the beam of a gantry-type machining center are analyzed by means of ADAMS and ANSYS. Considering effect of gravity and cutting forces, the static deformation of the beam is obtained after calculating the interacting forces between the guide and the slide block by ADAMS. Moreover, the contact parameters of the guide surface are acquired by dynamic tests and parameter identification, then they are applied to the simulation model of the beam-slide box system, whose natural frequencies and modal shapes are achieved by modal analysis. Furthermore, the effect of changes of the contact parameters on the dynamic behavior of the beam-slide box system is also investigated.

对一种国产龙门式加工中心的横梁关键部件，采用机械系统多刚体动力学仿真软件ADAMS和有限元分析软件ANSYS进行了静动态特性分析；在考虑重力和切削力作用下，由ADAMS计算出导轨与滑块间的作用力，从而计算出横梁部件的静态变形；通过动态测试和参数辨识方法获得导轨结合面特性参数并将其应用到横梁滑箱系统整体有限元模型中，经过模态分析得到系统固有频率和各阶振型图，并进一步分析了结合面参数变化对横梁滑箱系统整体动态特性的影响。

The paper makes description of effective box beam construction technology and workmanship which can be adopted in other projects,such technologies as:manufacturing and fixing of reinforcement,steel reinforcement fixing baseplate,web plate and top plate respectively and lifting the steel skeleton into form,requirements of design and manufacturing and way of utilization for dismantling-erection type formwork and hydraulic formwork,optimization of concrete ratio,concrete pouring process of two ends of beam in priority over the middle,in sequence of first baseplate followed by web plate and top plate at last,concrete pouring in inclined section and in horizontal layer,concrete vibration mainly byexternal vibrator in assistance with internal vibrator,methods and regulation for steam curing of concrete,dual controls over stress and strain to ensure quality of prestressing workmanship,construction method of effective beam moving by heavy-weight special moving facility,some regulations and key notes about construction of grouting under pressure,beam ends sealing,water-proof layer on the bridge surface system,protective coating.

文中介绍的采用胎具制作和绑扎钢筋，分底腹板和顶板分别绑扎并吊装钢筋骨架入模；拆装式和液压式两种模板的设计、制作要求和使用方法；综合考虑、优化混凝土配合比，混凝土灌注从两端至中间、先底板、后腹板、再顶板的施工顺序和斜向分段、腹板水平分层、附着式振捣为主、插入式捣固为辅的施工工艺，蒸汽养护的方法和规定；应力～应变双控制确保预应力施工质量的施工技术；采用重物移运器有效移梁的施工方法；压浆、封端、桥面防水层和保护层施工的一些规定和注意事项等都是对箱梁制造行之有效的施工技术和施工方法，并可为以后类似施工作借鉴。

In order to satisfy the equipment of physical experiment, it developed beam pulse technology research on ns-200 accelerator. It uses sine-wave beam adjustment pipe focused beam match design research beam pulse system、high frequency power supply system, pulse measure system and distance auto-control system.

在ns-200中子发生器上开展了束流脉冲化技术研究工作，采用正弦波速调管聚束方法设计了束流脉冲化系统，研制了高频电源系统、脉冲测量系统和远程自动控制系统。

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。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。