曲率

Gauss(1777—1855);intrinsic differential geometry;non-Euclidean geometry;Gaussian curvature;Gauss-Bonnet Theorem

Gauss，1777-1855；内蕴微分几何学；非欧几何；高斯曲率；高斯-博内定理

RESULTS The trend of dynamic frequency response of piezoelectric coagulation corresponded with the inverse S curve F =（f0-△f）＋△f/1＋e^（t-t0）/dtderived from theory according to the change regularity of the viscosity and density in the reaction system.

结果 根据反应体系黏度密度变化规律，理论推导出体外凝血反应过程，中压电频率动态响应规律符合F=（f0-△f）＋△f/1＋e^（t-t0）/dt等‰模型；根据该模型建立了新的反S拟合曲线法；与既有的最大拟合曲率法相比，前者检测速度更快（P〈0.01），重复性更好（P〈0.01）。

The research of both theories and practices of gridding in the dissertation shows that: Linear interpolation based on triangulation is simple computationally and fast, but its gridding results isn't smooth and its precision is low; Multiquardric method is also simple computationally with high precision and good effect, but its gridding is slow because it is based on global calculation; Minimum curvature method is fast with high precision and good effect, but its gridding quickly degrades over areas with sparse data control when grid spacing smaller than the actual grid spacing is used; Ordinary Kriging method is high-precision, but its gridding is slow because of large calculation; Inverse interpolation is a computationally fast, efficient and robust method with high accuracy and perfect effect, and its gridding results of different gridding orientations are basically identical. Inverse interpolation is suitable for thegridding of geophysical irregular data, especially for large-scale geophysical irregular data.

本文的方法研究和数据试验分析表明：基于三角网的线性插值法计算简单，速度快，但其网格化结果不光滑，精度不够；多元二次函数法计算简单，网格化精度高，效果良好，但它是基于全局计算的，计算速度较慢；最小曲率法计算速度快，网格化精度高，效果良好，但其在稀疏控制点的网格化容易出现振荡现象；普通克里格法网格化精度高，效果良好，但其计算量较大，一般计算速度慢；反插值法网格化计算稳定，速度快，精度高，效果好，而且在网格化方向不同的情况下其网格化精度效果都达到基本一致，适合于地球物理不规则分布数据的网格化，特别是大规模地球物理不规则分布数据的网格化。

This paper focuses on the forward and inverse proposition of streamline curvature method.

分别对流线曲率法正反两类命题进行了研究。

In addition we also make research on the residual curve velocity analysis and find that its application is not good and the efficiency is iow. The reasons is that the hypothesis is rigid and it is a local optimizing method.

本文还对目前实用性较强的剩余曲率速度分析方法进行了研究，指出该类方法的应用效果不佳和效率较低的原因在于，理论假设过多，与叠前深度偏移的初衷相违，同时该类方法是单点速度分析，是一局部优化方法，而无法解决具有强烈横向速度变化以及地下构造倾角较大的地震速度建模问题。

The curvature radius was derivated and the contact stress of the three-arc-sect isometric type surface was calculated through the elastic dynamics theory.

应用弹性力学理论，推导出接触点的曲率半径，对三弧段等距型面联接进行接触应力计算。

By assuming the electron temperature is isotropic, the curvature force term is simplified to the term shown on the right hand side of Equ.

假设电子温度是各向同性，曲率队来说是简体的名词所示，右及计。

Until the 1990s, surgical treatment involved a procedure called radial keratotomy, which entailed making radial cuts in the corneal surface to flatten the curvature to correct myopia.

直到20世纪90年代，外科治疗所涉及的一个程序，所谓的放射状角膜切开术，其中涉及决策径向削减在角膜表面平坦的曲率，以纠正近视。

It can solve seismic velocity problem in the area with lateral strong velocity variation. A new method is developed to improve the precision of velocity model building.

从射线理论的程函方程出发，提出了一种没有过多理论条件约束的基于模型全局优化剩余曲率分析速度建模方法，理论和实际资料的计算证明了该方法的有效性。

So it is different from the case for composite laminated shell with anti-symmetrical lay-up.

这与反对称铺层复合材料层合壳的双稳态曲率方向相同的情况不同。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。