When destroy getting deeply , nutrient elements and soil will lose severly . the energy can converse and exchange among buffer zones . according to the tourist capacity analyzing of the typical tourism sites in different landscape zones , the landscape patterns have been predicted for the future 景观结构变化给景观功能带来的影响表现在：旅游开发活动在破坏物种的同时又有利于促进物种流的流动；养分、土壤随植被的破坏程度增大流失作用增强；能量在不同景观区中流动的特征和所带来的影响各有不同。
When the tcf in nwp is high , the bengal bay cef which located at 90 e is strong and the new guinea cef located at 150 e is weak ; there is a anti - cyclonic circulation near the equator . the equatorial buffer zone is fortified : it is propitious to the equatorial anticyclones activated and push monsoon trough to higher latitude , this circulation pattern can promote the genesis of tc in nwp 多热带气旋年，位于90 e附近的孟加拉湾越赤道气流显著增强，而位于150 e附近的新几内亚越赤道气流异常偏弱；在赤道附近存在一个异常的反气旋性环流，赤道缓冲带较强，有利于赤道高压的活跃，季风槽被推向较高纬度，从而有利于热带气旋的生成。
This essay introduces the state - of - art systematic framework , priority research area of wetland sciences , specifically discovers the survey methodologies and techniques in wetland nature reserve , including those about natural setting of wetlands , wildlife resource , wetland vegetation , protection and utilization techniques of buffering zone of the nature resource 摘要本文介绍了当前湿地学科的体系框架、优先研究领域，着重概述了湿地自然保护区的相关调查技术，包括湿地自然状况、湿地野生动物资源、湿地植被和湿地周边状况利用保护调查技术等。
Based on the landscape remote sensing mapping , buffer zone analysis and total variation index calculation of landscape structure for two neighbored buffer zones were used to divide the natural landscape and human impacted landscape in wolong natural reserve . the spatial distribution characteristics of human impacted landscape were also studied 在景观遥感制图的基础上，利用缓冲区分析和相邻缓冲区的景观结构总体变异系数方法对卧自然保护区进行了自然景观和人为影响景观的分割研究，并对人为影响景观的空间分布特征进行了分析。
Employing idef to establish framework , dynamitic and functional models , the system also designs a non - back shifting search arithmetic for double - scanning buffer zone and a double - track structure for searching process . according to the characteristics of e - mail control and electronic documentary mining technology , bayes classifiers are made to strengthen the electronic control system in which electronic documentary mining technology is used ; and moreover the double systematic structure of c / s & b / s is constructor with the presence of some function relationships in mining process as well as systematic mining and program handling 系统采用i _ 2def方法建立了结构模型、动态模型和功能模型；设计了双扫描缓冲区的无回溯搜索算法及搜索过程的双栈结构；根据电子邮件监控系统和电子文档挖掘技术的特征，设计了bayes分类器并使用了增强型方法，提出了一种运用电子文档挖掘技术的电子邮件监控系统；构建了c / s和b / s双重体系结构；并给出了挖掘过程的部分函数调用关系及系统挖掘的处理过程、部分处理程序。
The results show that : in the 2 - 4m of road buffer zones and 0 - 10m of infrastrctuer buffer zones , the density of dominant species and biomass will decrease for herbs , and abundance and proportion will get bigger than other exents ( inner species increasing owing to the outer species invading ) ; in the shrub disturbence extent , there exists an inverse relationship between the influence degrees and buffer zones ; in the 40m of infrastructure buffer zones , there has the biggest influence on the trees , however , the effect of road buffer zones is unobvious , only a small change on the morphology 结果表明，草本类，游道影响源干扰区在2 4m ，设施类在0 10m ，原有优势种密度减小，物种丰度较其它干扰范围内有所增加(外部种入侵导致本地植物的种类数目增多) ，均匀度也增大，生物量减少；灌木类，在干扰范围内，影响程度与影响源的距离成负相关关系；乔木类，接近设施类40m处影响最大，游道类影响源则影响效果不明显，只有形态上略有变化。
Mixed goods is a buffer zone between public goods and private goods , therefore it is necessary to classify all mixed goods in detail so that different form of cost compensation can be adopted . the basis of classification is the degree of purity of mixed goods , which can be measured by analyzing its externality ; in othe 公私合作型混合产品:这类混合产品是由政府和私人或其他组织共同提供的，其外部性不象政府主导型混合产品那样大，也不象私人部门主导型混合产品那样小，可以说大部分的混合产品都属于这一类。
