景区规划中的旅游环境承载力分析

景区开发规划设计是否合理,事关旅游地的生命周期和可持续发展,而旅游环境承载力是旅游业可持续发展的主要判据之一。文章剖析了旅游环境承载力的内涵和特征,从指标体系的构建、权重的确定、数学模型的选取等方面讨论了旅游环境承载力的测评问题。     

论贵州农业资源环境特征与农业的可持续发展

在分析贵州农业资源与农业生态环境特征的基础上,阐述了贵州农业经济现状与持续发展所面临的困难,揭示出贵州农业经济结构与农业资源环境结构之间不相适应的矛盾。从而影响着贵州农业资源的高效利用和转化效率。为实现农业的可持续发展,贵州应将农业生产的持续性、农村经济的持续性和生态环境的持续性三者有机地统一。并提出了贵州农业可持续发展的目标与途径。     

一个改进的CO2排放影子价格模型

考虑使用化石燃料所排放的ＣＯ２被陆地森林吸收的因素,建立一个改进的影子价格模型,计算考虑ＣＯ２的海洋吸收和森林吸收双因子的影子价格数值,讨论减小ＣＯ２排放与中国经济产出之间的关系及对策     

新疆博斯腾湖环境变化及其初步评价

本文简要地回顾了新疆焉耆盆地近四十年来主要的水事活动及其对博斯腾湖湖区的环境影响。在此基础上,对该区的环境变化作了初步评价并提出了一些继续改善环境的建议。     

太湖平原中石器,新石器时代人类文化的发展与环境

本文主要研究太湖平原中石器、新石器时代人类文化的产生、发展与地理环境的关系。旧石器时代末期,太湖平原气候凉干,为森林、草原环境。古人类以采集、狩猎为生,穴居于洞穴之中。新石器时代早期,太湖平原气候暖湿,人类开始以农业生产和渔猎为生,在平原地区建聚落。新石器时代晚期气候转凉干,人类开始挖井取水,农业生产发展,手工业生产随着发展。     

120-150 ka human tooth and ivory engravings from Xinglongdong Cave, Three Gorges Region, South China

Rich paleoanthropological materials were unearthed in primary context from the Xinglongdong Cave in Fengjie County, Chongqing, South China, including a human tooth, numerous mammalian fossils, some stone artifacts and a Stegodon tusk exhibiting intentional engravings.Based on biostratigraphic data and uranium series dating,the cave was utilized as a human shelter about 120000-150000 years ago. It is the first time that an archaic Homo sapiens fossil has been unearthed from the Three Gorges Region. Engravings on the Stegodon tusk appear in groups,making up simple and abstract images. It is the earliest known engravings created by human beings; it exhibits great potential for the study of the origin of art and the development of ancient cultures in south China and bears important implications for the origin of modern humans in East Asia.     

A preliminary report on the newly found Tianyuan Cave, a Late Pleistocene human fossil site near Zhoukoudian

The Tianyuan Cave is the only human fossil-bearing site containing rich mammalian fossils found in the last decades near Zhoukoudian. Up to now more than 34 specimens of the human body have been recovered, and the mammalian fossils can be put into 29 species. Cervids dominate the fauna, and carnivores are very rare. Based on the primary examination, the human fossils can be attributed to the species Homo sapiens. All the mammalian fossils, except one between tooth of Crocuta belong to the species that still exist today. But some of them are the first records in fossil form north of the Yellow River, such as Arctonyx and Capricornis. Based on the mammalian fauna study, it seems that the Tianyuan Cave can be correlated with the Upper Cave.Sixty-three percent of the species of the mammalian fauna from the Tianyuan Cave are also present in the Upper Cave.The characters of the deposits also share some similarities between the Tianyuan Cave and the Upper Cave; both of them are mainly composed of breccia without cement. The dating using the U-series method on deer tooth samples indicates that the geological age of the new site is around 25 thousand years B.P. This is the first discovery of human sites outside the core area of the Peking Man Site at Zhoukoudian,which throws new light onto this world famous site complex.     

试论大学英语教学环境

大学英语教学环境是指对大学英语教学的发生、存在和发展产生制约和控制作用的多维空间和多元因素的环境系统。本文论述了大学英语教学环境的构成因素及它们分别对大学英语教学质量所造成的影响。     

乌鲁木齐旅游环境评价指标体系浅析

长期以来人们把旅游发展视为一种经济活动,偏重追求其经济效益,而忽略旅游对环境的影响,使旅游环境成为制约旅游业发展的瓶颈,建立完善的旅游环境评价体系是实现旅游业可持续发展的重要基础,文章对乌鲁木齐旅游环境存在问题、旅游环境评价的原则和评价模型建立的方法进行了探讨,旨在为乌鲁木齐的旅游环境评价提供理论方法参考.     

福建省真实国民储蓄与资源环境损失研究--SAMRE方法及其应用

应用“含资源与环境项目的社会会计矩阵” (SAMRE)方法及其数学模型计算福建省 1 991 1 999年资源净产值、环境净产值和真实储蓄值 .结果显示 ,福建省资源净产值与环境净产值各年损失幅度为1 1 .1 7× 1 0 862 .0 5 × 1 0 8元 ,真实国民储蓄比传统国民经济核算体系的净储蓄减少 1 .48× 1 0 869.4× 1 0 8元 .分析表明自然资源损失与环境污染成为福建省经济总量增长的重大代价 ,其发展呈弱可持续性特征 .同时 ,分析结果也显示 ,近年来资源与环境净产值损失占全省GDP的比重总体呈下降趋势 ,真实储蓄比重趋向上升 .