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A set of mathematical expressions are derived including geometrical matrix,stress matrix,stiffness matrix of weak plane element,equation of equivalent nodol load caused by unit initial stress in element.

文中推导了弱面单位的几何矩阵~6，应力矩阵~6，刚度矩阵~6以及单元初应力引起的等效结点荷载{P}等计算公式。它们有别于一般文献所列算式。

We have strong Aeromodelling Aeromodelling teachers and coaches, to carry out science and technology education for young people have job experience, most recently, Zhou Wei Hung Teacher designed "hand throwing a bright Comprehensive Model plane gliding experiment packages" have been applied for national patent and supported by the Guangdong Provincial Department of recognition, was classified as a high school class of universal common technology-specific teaching materials.

我们有实力雄厚的航模师资队伍和航模教练，对开展青少年科技普及教育工作有丰富的经验，最近，周伟烘老师设计的"光明手掷滑翔模型飞机综合实验套材"已申请了国家专利，并得到广东省教研室的认可，被列为高中通用技术课普及专用教材。

With the aid of Zemax software, a three-mirror, unobscured, high-resolution optical system with large aperture, long focal length was successfully aligned by first collecting interferograms from several fields of all image plane, and obtaining the wavefront error, namely, obtained wavefront Zernike polynomials; then using the self-made program package to calculate the optical system misalignment.

利用Zemax光学设计软件与自编计算机辅助装调软件，实现了对大口径、长焦距、无中心遮拦离轴三反射镜光学系统的装调。通过Zemax软件模拟光学系统的失调模式，得到整个光学系统的波前像差，把波前像差代入到自编的复杂光学系统计算机辅助装调软件中，计算出光学系统的失调量，与引入的失调量对比，证明了其正确性。在实际的装调过程中，用小型球面干涉仪分别收集3个视场的干涉图，得到失调光学系统的失调量，用Zemax软件验证失调量数据的正确性，从而指导装调。

By learning this course, students should proficiently use algebraic methods to solve geometric problems and practical problems, and proficiently grasp the basic ideas and methods of vector algebra and geometric properties of spatial line, plane and quadratic surface.

通过本课程的学习使学生熟练掌握运用代数方法解决几何问题并应用于实际问题之中，并熟练掌握向量代数的基本思想和方法，同时使学生熟练掌握空间的直线、平面和二次曲面及其各种几何性质。

Based on the pin hole model and assume the intrinsic parameters of the camera were known ,a method for calculating the extrinsic parameters was introduced .the norm vector for any plane was determinate by two images that take from different view point.

从摄像机的针孔模型出发，介绍了在摄像机内参数已知的情况下，采用单平面模板求摄像机外参数的方法。

In the Cartesian coordinate system,compute the image plane revolution vector quantity caused by scan mirror′s rotation applying coordinate conversion and geometrical optics.

在笛卡尔坐标系中，通过数学坐标变换和几何光学的方法对不同工作方式的航空相机由扫描反射镜沿俯角方向旋转引起目标像旋转问题作定量计算，为偏流补偿机构工程应用提供理论依据。

Dispersion and birefringence are investigated simultaneously by using the full vectorial plane wave method.

采用全矢量平面波法，对其色散和双折射特性进行了数值模拟。

A large mode area core erbium doped K9-glass single-mode photonic crystal fiber is designed by getting the pump and signal intensity profiles from plane wave expansion methodand solving propagation-rate equations.Its diameter is 20μm,limit ellipticity error is 94.7%,and limit offset of inner ventage is 0.1μm.Then we analyze its amplifier characteristics.

根据平面波展开法给出泵浦光和信号光本征模场分布，结合速率方程和功率传输方程设计一种大单模尺寸的实芯掺铒K9玻璃大模式面积单模光子晶体光纤，芯径为20μm；分析其椭圆度容差为94.7%，最内层小孔最大允许偏移量为0.1μm；分析了掺铒K9玻璃光子晶体光纤放大器的放大特性。

In the virtual surgery system, the virtual scalpel could be manipulated on 3D liver mould with PHANTOM. The simulating effect was the same as the clinic operation for auxiliary partial orthotopic liver transplantation. Plane visualization of hepatic resection and intrahepatic vessel cutting was achieved by adjusting the transparency of the resection part. Life-like could be felt and power feeling could be touched during virtul operation. Conclusion ① The visualized liver mould reconstructed is 3D and verisimilar, and it is helpful to design reasonable scheme for liver transplantation.

在建立的虚拟手术系统的虚拟环境中，使用力反馈设备PHANTOM操纵"虚拟手术刀"模拟了辅助性部分原位肝移植的手术过程，其结果符合临床手术的效果；通过控制肝脏模型切除部分的透明度，使肝脏手术切割平面可视化以及肝脏内部管道手术切断平面可视化；手术模拟过程逼真，形象，且有"力"的感受。

A mechanical drawing showing the interior of an object as if made by a vertical plane passing through it.

好像用一个垂直平面切开的一样的展现物体内部结构的一种机械图。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。