桥的

The effects of mass ratio on dynamic Characteristics were investigated by solving the dynamic equation of the model. The approximate formula of seismic response were deduced based on Energy Conservation Law.

通过求解简化模型的动力方程，分析了质量比对连续梁桥纵桥向的动力特性的影响，并用能量法推导了低阶振型地震反应的近似公式。

The skyline of the Aragonese capital of Zaragoza has been transformed by the addition of a new modernist bridge. Crossing the river Ebro, the structure is both a bridge and a building.

首都萨拉戈萨的阿拉贡的天空，因为新添的现代桥而有所改变，跨越伊布罗河的结构，既是桥也是建筑物。

The converter combines the advantages of the PWM technique and soft-switching technique, the PWM is effected all over the whole loads range, and soft-switching is effeted only in the switching transition period, the ZVS of leading-leg is achieved by using the energy stored in leakage inductor of the transformer and the output inductor, the ZCS of lagging-leg is achieved by using a blocking DC capacitor, the ZVS and ZCS are achieved for the whole load ranges (5A~250A).

控制电路采用相移控制方式，综合了PWM控制和软开关技术的优点，在大范围内实现PWM控制，而在功率器件换流期间实现软开关换流，其中超前桥臂利用变压器的漏感，实现了零电压开关，滞后桥臂利用隔直电容，实现了零电流开关，并且整个变换电路能在（5A~250A）的范围内实现软开关工作条件，满足弧焊电源负载变化大的特点。

Therefore, it is need to add axles to meet the requirement of the large-tonnage truck crane in the classis design, and thus double axles steering or multi-axle steering truck cranes have emerged as the times require, which make the research and analysis of the multi-axle steering system kinematics become more and more important.

为此，在汽车底盘设计上需要通过增加汽车的车轴来适应大吨位车辆的需求，于是出现了双桥或更多桥转向的车辆，使得对多桥转向系统运动学的分析与研究变得日益重要。

A new universal hybrid topology is brought forward. Two types multilevel inverter: equal DC voltage and DC voltage in geometric proportion is studied, besides this, simulation and experiments on SVPWM applied on cascaded H-bridge inverter is also studied.

提出了多电平逆变器的一种通用组合拓扑结构，针对这种拓扑结构重点，研究了直流侧电压相同及等比变化的两类级联拓扑以及级联H桥逆变器的矢量控制方法；并对级联H桥逆变器的矢量控制方法做了实验研究。

When we use stance to perform a punch, we can easily throw out a powerful punch at the short distance by twisting of the haunch with stance.

长桥发力意思就是当您的手明明已经伸至最长的时候，仍然可以继续发出高扭力的狠劲，我们常常在练跆拳道的人口中听说"发拳力来至于距离"，就是等于他们还未能做到长桥发大。

Analysis its effective distribution width and its impressible through the thickness of girder deck and transversal board by create entity finite model.

通过空间有限元建立实体模型进行了有关参数敏感性分析，研究桥面板的厚度、横隔板的厚度对桥面板的有效分布宽度的影响。

In this article,a simplification of the entire bridge lattice into a "Plate Girder Frame" whose solution can be found by means of the force method is used instead.

在现有计算双梁桥架的内力的方法中，都是将桥式起重机的主梁简化成简支梁来计算的。

Infrastructure preparations The site of the event is the Nanpu Bridge-Lupu Bridge region in the center of Shanghai along both sides of the Huangpu River.

系统内各部分准备事件的位置沿着黄埔河的两者边在上海的中心是南浦桥-路普的桥区域。

The space quadrature vector oriented control can decouple between output current and frequency of the inverter by Park transformation, which guarantee the quite high accuracy of the 90 degree phase angle between the two-phase output current that supply for two phase electromagnetic stirrer in quite low frequency.

提出了一种基于空间矢量定向的二相电磁搅拌器逆变电源的结构和控制策略，该逆变器采用六桥臂式主电路拓扑结构，逆变器的第三相桥臂与两相电磁搅拌器的中点相连。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。