曲面

Theemphasis is to build anomalistic curves and surfaces from numbers of datum.

着重阐述了由大量数据点进行不规则曲线、曲面反求的完整技术。

First, give some methods for calculating the area of anomalistic area on plane, then deducing the methods special for calculating the sea area such as method of calculating coordinate points and method of counting grids, also, another method of counting pixels.

通过多次实测计算和数据分析，曲面坐标法和数点法的计算结果是较为稳定的、并且精确度高。

The approximate method for strength calculation by using the convex nature of failure surfaces.

利用破坏曲面的凸性的承载力近似计算。

Nevertheless, the laminated shell model with variable thickness and material properties can be employed to approximate the tire of composite construction.

以轮胎的内轮廓曲面为参考面，用正交曲线坐标描述轮胎的几何变形。

Firstly part of quadratic term of Taylor series is chosen; a low-dimension surface is used to approximate limit state surface ; and the modified reliability formula is derived.

首次选取泰勒级数的部分二次项，用一个距原点最近点处拟合的超低维曲面近似极限状态面。

During isothermal extruding of blank, in order to make the material fill successfully into the mold cavity and demould successfully, by using dressing on curved surface of the globoid cams and adopting circular arc transition on each connection, the blank with high precision and shape approximate limit was obtained.

在毛坯等温挤压过程中，为使材料顺利地充满凹模型腔以及成形后脱模顺利，通过在弧面凸轮曲面上加盖敷料及在各连接处采取圆弧过渡，以制得高精度的近似净形零件毛坯件；并采用MSC。

An approximate arc length parameterization method which plays animportant role in blade modeling is also presented.

另外，本文还分析了建立叶身曲面模型的关键技术，并对其中涉及到的近似弧长参数离散的方法进行了研究。

Applying theories of numerical analysis and higher geometry, the corresponding mathematical model of stem line is established according to different stems. Whereby, the centers, radii of the arc and its tangent points with the water-line can be found and the curve of arc radius is thus determined. A general formula for expressing stem curved surface is introduced.

应用数值分析和计算几何理论，根据船体首部线型特点，建立首柱轮廓线数学模型；计算水线首圆弧圆心、半径和切点，确定首圆弧半径线；给出首部曲面的通用方程式。

Based on the Reynolds stress model CFD numerical simulation method, the experimental study of the inflow field and separation feature of nine forms of entrance structures of the oil-water separation hydrocyclone including vortex curved entrance and Archimedes spiral entrance is carried out and four kinds of ideal optimized entrance structures are obtained.

采用雷诺应力模型CFD数值模拟方法，对涡线形曲面入口、阿基米德螺旋线形入口等9种油水旋流分离器入口结构形式的内流场和分离特性进行了试验研究，得出比较理想的4种优化入口结构形式。

As to the problem of the time needed for an airplane to start from Beijing,fly over arctic pole,and reach Detroit,this article discusses how much time can be saved in the models that established in the article in comparison with the original flight route.

本文对"飞机从北京出发、飞越北极直达底特律的所需时间，可比原航线节省多少时间"的问题进行讨论，并将航线选择归结为寻求曲面上的最短弧。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。