英文摘要

查看全文 下载全文     

本期论文英文摘要

查看全文 下载全文     

英文摘要

查看全文 下载全文     

英文摘要

查看全文 下载全文     

英文摘要

查看全文 下载全文     

英文摘要

查看全文 下载全文     

THE QUANTITY OF A DEGREE IN OUR ENGLISH MEASURES

Abstract

This is a brief account of a contribution to geodetic measurement, less well known than the great surveys of the eighteenth and nineteenth centuries, but a remarkable achievement because it was the work of one man and was done more than three centuries ago.     

土地利用现状更新调查体会

本文介绍土地利用现状更新调查作业方法、经验体会，对若干问题进行讨论。     

THE PRESENT STATE OF ECOSYSTEMS IN MONGOLIA: PRINCIPLES OF EVALUATION AND MAPPING

This paper explores how such characteristics as the polarization of reflected radiation, the angular characteristics of its reflectance, and its thermal properties can be used to supplement conventional remote sensing studies of the condition of the vegetation cover. One possible application is clarified by means of an experiment testing the relationship between the degree of polarization of radiation reflected from cultivated cotton fields and the condition of the crop in those fields. Empirical data demonstrate that changes in the geometric structure of (and reflectance from) fields occurs when cultivated plants are subjected to stress (disease or moisture deprivation). Translated by Edward Torrey, Alexandria, VA 22308 from: L. N. Vasil'yev, ed., Kosmicheskiye metody izucheniya biosfery [Remote Sensing Methods in the Study of the Biosphere]. Moscow: Nauka, 1990, pp. 77–82.