小梁

Based on the modal superposition method and the exact solution of beam nature vibration, the motion equations of the simply supported and continuo...

基于模态叠加法和梁固有振动的精确解，建立了移动荷载作用下简支梁和连续梁的运动方程；利用样条最小二乘法逼近桥梁应变响应，由样条数值微分求得响应导数；再通过Tikhonov正则化方法结合奇异值分解技术得到了荷载识别的正则解。

What is more,the model experiment of the composite crunode was done.The study sh...

研究表明，合成梁式的结点可用于无伸缩缝桥梁设计；在满足设计承载力的情况下，桥台的高度和长度宜取小值；桩存在一个合适的相对刚度，当桩相对刚度超过这个值时，对合成梁式的结点受力几乎没有影响。

Then the MEMS solenoid type electromagnetic actuating and novel, frictionless and wear-free, and simple structure are designed for fiber-deflecting type MEMS VOA: One of the two coupled single mode fibers is completely fastened in one of the three aligned U-shaped grooves while the deflectable fiber is partially fixed in another groove with a long front section suspending over the wider groove as a cantilever beam. The two fibers, any one for input and the other for output, are well aligned initially so that the insertion loss is very low. Beside the deflectable fiber is a solenoid microactuator with a U-shaped permalloy core attracting a permalloy piece glued on side of the fiber cantilever so that the fiber is deflected and the optical power coupled between the fibers decreased continuously. Using MEMS solenoid as a continuous actuator and the novel structure of VOA are not seen in literature.

为光纤偏移型MEMS可变光衰减器设计了MEMS螺线管电磁驱动方式以及新颖的避免了静摩擦、磨损而且简单的整体结构形式：在硅基片的三段V形槽结构中，将两个对接单模光纤之一完全固定在基片上，只将另一根光纤的稍后部位固定于基片上而使其前端的一定长度悬空，形成一个悬臂梁结构；初始对准后两根光纤之间的光传输损耗很小；通过U型铁芯MEMS螺线管吸引固定于光纤悬臂梁上的坡莫合金片，驱动光纤悬臂梁连续偏移以使两根光纤之间功率传输系数连续变化，从而达到光功率连续衰减的目的。

In this papey,the force effect on marine pipelines under extreme working conditions during float towing is introduced,a mathematical model of the pipeline with the help of the five-movement equation is built,and the relevant procedure is developed.

目前，国内外对于浮拖过程中管道进行受力分析，主要运用：线性梁理论(适用于在钢管水中受力时的小挠度情况)、非线性梁理论(对浅水和深水均可应用，并对小挠度和大挠度都有效)[1]。

The main girder is designed to apply C60 pumpable high performance concrete with set retarding, high early strength and good volume stability to avoid cracking and meet the time requirement for the project.

主梁混凝土设计为C60泵送混凝土，采用8米挂篮悬浇工艺施工，混凝土技术要求很高：不仅坍落度损失要小、易于泵送，而且还要具有较长的缓凝时间，以保证一个梁段一次浇筑完成；有较高的早期强度，可在3至4天内进行预应力张拉，以缩短节段悬浇周期；有较好的体积稳定性，以避免梁体产生有害变形和开裂。

The finite element model included two types of main element: beam element for concrete and truss element for internal unbonded or external tendon. The end nodes of main elements were connected with internal constraints named MPC in ABAQUS. Spring elements with very large stiffness were set up at the place of the deviators of externally prestressed beams, or along the span with relatively little space of unbonded internally prestressed beams. The modified Riks method is utilized to trace the entire structural response of beams prestressed with unbonded tendon from zero to ultimate loads. The reliability of the analysis model is verified by analytical results of typical test beams in comparison with experimental ones.

该有限元模型由两类主单元组成，即混凝土梁单元和体内无粘结或体外预应力筋桁架单元；主单元的端部节点用ABAQUS的内在约束MPC连接；在体外预应力梁的转向块处，或沿体内无粘结预应力梁全跨并以比较小的间隔设置刚度足够大的弹簧单元。

Taking Rong hu bridge project as the background, the paper Studies on the optimization of dead load cable tension, construct system of controlling, effect of non-linear factor, limit bearing capacity of structure and spatial stress of concrete-filled steel tubular tower and the combination of girder, which are based on the hybrid cable-stayed bridge.Asking for the maximal deformation of tower and girder to be minimized and cable permissible stress as constraint conditions, the paper tries to solve the ideal dead load cable tension by combining finite element calculation and optimize analysis.

本文以蓉湖大桥工程为背景，就混合梁斜拉桥的成桥恒载索力优化、施工监控体系、过程非线性因素影响、结构极限承载力、索塔和主梁结合部的空间应力分析等问题开展研究：关于索力的优化，是以斜拉桥索塔和梁的最大变位最小为目标，以拉索容许应力为约束条件，采用有限元计算与优化分析相结合的方法来确定斜拉桥的成桥合理恒载索力。

An intelligent structure technology is used to monitor the strain response signals from a sandwich beam,and then the first order complex Guassian wavelet transform is applied to study the strain response signals.

利用智能结构技术监测夹层梁结构的应变响应信号，对应变响应信号进行复一阶高斯小波变换，通过分析小波变换系数中包含的奇点特征，对梁上的损伤信息进行了有效的识别，监测结构的损伤状况。

Surgical treatment of medically refractory epilepsy involving the central sulcus region YAO Yi ,TAN Qifu, ZHANG Xiaobin, et al. Department of Neurosurgery, The 174th Hospital of PLA, Xiamen 361003,China

作者：作者：姚一，谭启富，张小斌，江建东，杨昌梁，黄德志，方赟作者单位：361003厦门，解放军174医院神经外科（姚一，张小斌，江建东，杨昌梁，黄德志，方赟），南京军区总医院神经外科来源：医学期刊/神经病学与精神病学收藏本文章

Surgical treatment of medically refractory epilepsy involving the central sulcus region YAO Yi ,TAN Qifu, ZHANG Xiaobin, et al. Department of Neurosurgery, The 174th Hospital of PLA, Xiamen 361003,China

作者：姚一，谭启富，张小斌，江建东，杨昌梁，黄德志，方赟作者单位：361003厦门，解放军174医院神经外科（姚一，张小斌，江建东，杨昌梁，黄德志，方赟），南京军区总医院神经外科

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