surface area theory

The northern China is not only rich in wind energy resources, but also the main area of the dust weather occurred. Therefore, the study of near-surface wind speed trends of climate change is urgent in theory and practice.

中国北方地区是我国风力资源最丰富的地区，也是我国沙尘天气发生的主要区域，因此研究该地区地面风速的变化特征具有理论和实际上的迫切性。

On the bases of analyzing the theory of GPS height survey, the author put forward a method to survey height accurately with GPS in mountain area by setting up a basic height surface and adding a correction of abnormal gravitation in mountain area.

在分析GPS测高理论的基础上，提出了用建立基础高程面和加入山区重力异常改正的方法，实现山地区域GPS精确测高，并用实例进行了检核，达到了四等水准测高精度要求。

The development of optical imaging Simulation is introduced, and space remote sensing image simulation process based on the leaf area index and other surface parameters is studied in the paper, which anglicizing the surface reflectivity, atmospheric radiation transfer and optical sensor theory.

本文在系统地介绍了国内外光学成像仿真技术发展概况的基础上，分别对地表反射率生成、大气辐射传输、光学传感器原理进行了分析，提出基于叶面积指数等地表参数的航天遥感图像仿真流程。

The theory of mixed volumes provides a unified treatment of various important metric quantities in geometry such as volume and surface area.

凸体的混合体积理论提供了统一处理各种不同的重要的几何量的方法，比如体积和表面积等。

The theory of condensation on insoluble particles depends qualitatively on the reduced liquid surface area.

定性地说,在不可溶粒子上的凝结理论是与这减少的液体表面积有关的.