The variation principle of the 3-D contact problem is introduced, the related formulas based on the finite element method are derived, and the contact mode and condition of the boundary are discussed.

介绍了三维接触问题的变分原理，推导了接触问题有限元计算公式，讨论了边界接触模式和接触条件。

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The second obligatory condition is the possibility to shoot in manual mode, when sensitivity, exposure, diaphragm, and the compression quality can be adjusted by the user.

第二个必要的条件是，操作者可以调节感光，曝光，快门以及压缩质量，以手控的方式拍摄。

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Adopting algorithm of random event 'conditional probability and introducing condition association coefficient of failure mode can reflect failure dependence of structure.

采用随机事件的条件概率的运算法则，引入失效模式间的条件关联系数来反映结构之间的失效相关性。

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To make brilliant photography easy, the new WB cameras also incorporate features such as Best Face, which automatically selects the best facial expressions from a burst shot to create group photos where everyone looks their best, as well as SMART Mode and Motion Photo features, allowing users to achieve pro-standard quality and creativity under any condition.

ENGADGET: Samsung launches six new point-and-shoot cameras at CES