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Methods: The parameters of patellofemoral joints (normal group: 30; abnormal group: 20) were studied at the 0, 6, 12, 18, 24, 30 and 36 degrees of flection with MR in axial plane and MPW, LPA, FTA, PTA, FTD were measured, then, compared in the normal and abnormal ups.

对两组(正常组30个,病例组20个)膝关节分别在被动屈曲0,6,12,18,24,30,36下进行轴位动态MRI检查,测量髌骨最大径,外侧髌股角,股骨滑车沟角,髌骨倾斜角,股骨滑车沟深度,分别比较正常组及病例组在七个不同屈曲角度下各测量参数的差异性。

This paper mainly consists of three parts:(1) Based on the Reddy's higher-order shear deformation plate theory and general von Kármán-type equations, put forward the governing equations of pre- and post-buckled vibration of several hybrid FGM plate forms which have not been studied adequately, triumphantly applying the perturbation technique combined with Galerkin method into equations solving, and get the comparatively simple result forms with complicated deduction at last;(2) As a new type of materials, piezoelectric fiber reinforced composite actuators were applied to optimal vibration control, interrelated informatons be depicted in this paper;(3) During the investigative cource, some factors not been considered adequently in other researches were discussed fully in the postbuckled vibration analysis, such as the temperature-dependent material coefficients, heat conduction and nonlinear vibration characteristic etc.

本文的研究工作主要包括:(1)基于Reddy高阶剪切变形板理论和广义Kármán型方程,给出了几类现有研究成果较少或没有彻底解决的FGM混合板结构的屈曲前和屈曲后振动特性研究的控制方程,成功将摄动-Galerkin混合法应用于求解过程,并给出了各控制方程相对直观且易于计算的解析解形式;(2)单向压电纤维增强复合材料(Piezoelectric Fiber Reinforced Composite,简称PFRC)是一种新型压电材料,本文将其应用到了结构振动控制研究当中,发现通过压电纤维体积含量的选择可以实现混合板结构的优化振动控制;(3)围绕几种有代表性的FGM混合板结构,讨论其屈曲后的振动特性,在分析中同时考虑热传导,材料物性参数的温度相关性,以及机/热/电荷载耦合效应对非线性振动特性的影响,最后给出了大量数值计算结果。

The discrete stiffener solution and orthotropic plate solution are used for analyzing the buckling behavior of intermediately stiffened plates theoretically in this paper. Thus, closed-form solution of critical buckling stress and required adequate stiffening rigidity of the stiffener is obtained.

本文分别用分离加劲肋法和各向异性板法对纵向中间加劲板件的屈曲性能进行了理论分析,得到了屈曲应力和理论充分加劲刚度解析表达式。

Any of several plants of the genus Iberis in the mustard family, native to Europe and the Mediterranean region and widely cultivated for their showy clusters of white, pink, crimson, or purple flowers.

伞形屈曲花一种十字花科屈曲花属植物,原产于欧洲和地中海地区,因其白色、粉色红、深红色或紫色的鲜艳花簇而广泛栽种

Most of curl paralysis comes from bending the third phalange. This can be demonstrated by bending only the third phalange and then trying to move that finger rapidly.

绝大部分的屈曲瘫痪均来自屈曲指尖关节并试图高速活动手指。

OBJECTIVE: To compare the clinical outcome between fixed platform high-flexion prosthesis and rotating platform high-flexion prosthesis following total knee arthroplasty.

目的:比较应用固定平台高屈曲假体与旋转平台高屈曲假体行全膝关节置换后临床疗效的差异。

The critical buckling loads and buckling modes are described by eigenvalues and eigensolutions in symplectic space.

在辛几何空间中,将圆柱壳的临界屈曲载荷和屈曲模态归结为辛本征值和本征解问题。

In a symplectic space,eigenvalues and eigenfunctions take the place of the critical buckling loads and buckling modes of the problem.

对于壳体的前屈曲问题可采用小变形理论,而后屈曲问题则需采用几何大变形理论。

Eigenvalue buckling analysis can only forecast the theoretical buckling strength of an ideal linear elastic structure, because of the unideal property of material and geometrical nonlinearity, most structures can not reach their theoretical strength limit.

特征值屈曲分析只可预测一个理想线弹性结构的理论屈曲强度,材料非理想性与几何非线性使得大多数结构无法达到它们理论强度极值。

In an effort to obtain a quantitative measurement of both anteroposterior tibiofemoral position and active knee flexion we have routinely taken post-operative lateral radiographs in a position of maximal active flexion.

为了定量测量出前后位胫骨与股骨之间的相对位置及主动膝关节屈曲范围,我们常规在术后拍摄了最大主动屈曲状态时侧位 X 线片。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。