甘肃农业大学农耕特色库

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唐代前期河西州县城城防研究: 作者： 张向红 来源： 西北师范大学 年份： 2010 文献类型： 学位论文 关键词： 河西州县城唐代前期城防; 描述： ch as the important town of the Silk Road, multi-ethnic coexistence and the border district administrative center. In order to ensure normal exchange between the East and the West, frequent contact among ethnicities, and effective administration in He-xi area, it was extremely essential to establish city defense. Therefore, the Tang government built the city defense system that was mainly military defense and based on social balance. Mainly included the screen protective system of Army, Shouzhuo, City, Town, Shu, etc., which had some focal point and very wide and located out of the cities; Three layers external protective system that was composed of a deep ditch to round every city, sheep and horses cities, city wall; Multiple structure system such Luo city(outer city), Zi city(inner city), fang(residential area), Shi(markets), and so on; Garrison inside cities and out of locality system; Feng, Yi and other information systems; General's office person of ability system; Warehouse reserve and social balance system. Because of the important geographical position strategic and the special social security problem, the He-xi Prefecture and county city defense had formed Trinity characteristic with the national defense and the security defense. The city defense soldiers had a hand in Tuntian to bring about He-xi area’s agricultural advance; A large number of people of city defense formed the consumer market, had promoted the prosperity of the commerce; The city defense ensured traffic and military assistance, made He-xi Prefecture and county cities become the rear base to administer Central Asia. However, the city defense had its limitation, such as impotent military might at times (it offered an opportunity of Tibetan expanded in north-west area), because of the condition between the country and the locality. It, to a certain extent, had influenced on the valid function of city defense.; 全文：政府构建了以军防为主、社会平衡为基础的城防体系,主要包括城外军、守捉、城、镇、戍等广阔而有重点的屏卫体系;隍堑、羊马城、城墙三重外卫体系;罗城(外城)、子城(内城)、坊(居民区)、市(市场)等多重

清代河西走廊土地利用及其环境效应: 作者： 张钰 来源： 西北师范大学 年份： 2009 文献类型： 学位论文 关键词： 河西走廊土地利用/土地覆被的变化环境效应历史地理; 描述： f the earth's surface.Therefore,it has great benefit for clarifying the mutual action between human beings and land and their change principles in the historical period when the land use and the land cover changes are chosen as the study perspective.; 全文：生态隐患得不到根治而使生态环境愈加恶化,而这正是酿成今天河西走廊成为典型生态脆弱区的主要原因。本文即着眼于此,阐释了清代人们对河西走廊土地利用及其驱动因子,揭示了土地利用、土地覆被变化与环境效应之间

魏晋南北朝绘画构图浅析: 作者： 杨玉山 来源： 西北师范大学 年份： 2009 文献类型： 学位论文 关键词： 魏晋南北朝构图审美绘画; 描述： creativity. With the collapse of the Han Dynasty, the knowledge class; 全文：,将“人的自觉”的因素渗透到对艺术的理解、阐释和表现中,极大地推动了中国艺术的创新历程,并奠定了中国画几千年来的基本审美情感和审美追求。文人士大夫参与到绘画事业中,使得中国绘画史的发展整体上具有

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