查询词典 beam-focusing

Adaptive control theory,structural parameter identification and error analysis are used to control the construction of pre-stressed-concrete cantilever casting bridge.The construction camber for main beam can be determined by BP artificial neural network.The deflection of main beam should be tested persistently.

对于采用悬臂浇筑施工方法的预应力混凝土桥梁，运用自适应控制理论进行结构参数识别和误差分析；利用BP人工神经网络确定主梁预拱度；在施工过程中对主梁挠度进行连续监测。

The second spanwill not fully recover from the initial negative deflection resulting in unwanted soffi t variations.In calculating camber strips to compensate for beam deflection, the entire dead load must be considered including the weight of the formsand the weight of the beam along with any residual camber for the structure.

第二跨度不会完全复原，从最初的负偏转造成不必要索菲笔variations.in计算轮圈狭长，以补偿束偏转，整死负荷，必须考虑包括重量的形式和重量的光束沿任何残余拱结构。

Last, Nano Indenter XP was used to measure the mechanical properties of the fabricated probe structures, the results show that the spring constants of cantilever type and simply supported beam type probe structures were 2556 Nm-1 and 26280 Nm-1 respectively, which were close to the designed values of 2838 Nm-1 and 23935 Nm-1 with the error of 9.94% and 8.92%. DC probes and HP 4194A Impedance/Gain-phase Analyzer were adopted to measure the electrical properties of the simply supported beam probe card. The contact resistance from the probe tip to the end of stripline was 0.6Ω. In the frequency range of 5 to 40 MHz, the characterized impedance between two probes was larger than 20 kΩ, and the capacitance was from 0.17 pF to 0.27 pF.

采用Nano Indenter XP纳米压痕仪对制备后的探卡结构进行力学性能测试，测得悬臂梁和简支梁的弹簧常数分别为2556 Nm-1和26280 Nm-1，与2838Nm-1和23935 Nm-1的理论设计值相差9.94%和8.92%；采用直流探针和HP 4194A阻抗分析仪对简支梁型探卡结构进行了电学性能测试，从简支梁探针到引线末端的直流接触电阻为0.6Ω，在5-40 MHz范围内，探针间特征阻抗大于20 kΩ，电容在0.17 pF至0.27 pF之间，测试结果表明探针的接触电阻小、射频隔离性能好。2。

The main beam of car dumper roller is made a important transformation using tensile bar, using the other method auxiliary, we solve thorough the problem of main beam break due to stress focus , Operation practice shows that after transformation, the item is a great success.

介绍秦皇岛港煤码头四期工程翻车机系统的技术改造项目，其中翻车机钢结构的主梁部分采用拉杆结构，辅之以其他方法，彻底解决了应力集中导致的主梁断裂问题，实践表明，改造获得了成

The study reveals that the reflection characteristics of cat eye effect are intimately correlated with the parameters of the cat eye optical lens and transmitting laser beam, furthermore, this characteristics would change obviously when the distance between the waist of the incident beam and the cat eye optical lens changes greatly.

研究表明，猫眼效应反射光特性与猫眼光学镜头参数和入射激光参数关系密切，在近距离和远距离有着很大差别。

Second, to expound the performance of steel reinforced lightweight gangue concrete with no reinforcement, analyse the calculation theories of column and beam calculation formula, and finally conclude the calculation formula more appropriate to steel reinforced lightweight gangue concrete beam and column with no reinforcememt.

二、阐述了型钢混凝土的受力性能；分析了梁、柱构件的计算理论；根据我国现行规范所应用的计算理论，提出了适用于无配筋轻骨料型钢混凝土梁、柱的计算公式。

Based on the effective stress of cable, the concrete strain of each layer for every beam element was determined, and appeared to take as the initial condition of beam.

把建立在缆绳的有效压力的基础上，具体的每一为每一个梁要素的层种系是已下决心的和似乎作为梁的原始条件发生作用。

After verification of FEM, 45 species of 15 series are computed. The major parameters including slippage coefficients, pretensions forces, dimensions of angles, arrangement of bolts, connection method among angle, beam web, column flange, and so on are studied. Some important conclusions are drawn.At last, Advices for seismic design based on tests and FEM analysis are presented at last. The study is rather comprehensive and systematic, and the conclusions. can be useful for revising design code, guiding design of engineering, and provide good basis for further to study behavior of shear beam-to-column connections.

主要研究了摩擦系数、螺栓预拉力、螺栓线到与柱连接角钢肢背的距离、螺栓直径及级别、梁长、螺栓排列布置、梁高、柱翼缘厚度、角钢厚度、角钢长度、梁腹板只与角钢肢尖相焊接、钢材强度、角钢与梁柱均栓接、角钢与柱焊接与梁栓接、角钢与梁柱均焊接等参数对腹板双角钢梁柱连接滞回性能的影响，得出了一系列重要的结论。

According to this exact analytical expression,the effect of every part of a beam pumping unit on crank axle torque can be quantitatively studied. This method can be used to analyze all types of beam pumping units.

利用该解析式可以定量地分析游梁式抽油机各部件对曲柄输出轴扭矩的影响，准确地进行游梁式抽油机的平衡分析和设计计算。

On the basis of kinematic analysis of beam pumping unit,the general dynamics equation in the form of virtual power was applied to analyze the contribution of every part including balancing weight of a beam pumping unit to crank axle torque in consideration of inertia effects. The exact analytical expression for computing crank axle torque was obtained.

根据抽油机各处在任一瞬时所受的主动力和虚加的惯性力在任一虚速度上所作的元功率之和等于零的原理，考虑惯性的影响，应用虚功率形式的动力学普遍方程，对游梁式抽油机各部件对曲柄输出轴扭矩的贡献进行了分析，得到了曲柄输出轴扭矩的精确解析式。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷