重要生态功能区生态补偿研究综述

在综述了生态补偿概念及其补偿类型划分研究基础上,提出了重要生态功能区生态补偿概念,并对国内外水源涵养功能区、防风固沙与土壤保持功能区、调蓄防洪功能区以及生物多样性保护区等重要生态功能区生态补偿模式进行了综述与分析,指出了重要生态功能区的生态补偿发展趋势,为我国开展相关研究及制定相关生态补偿政策提供参考。     

林业决策支持系统设计模式探讨

本文根据林业的特点,应用系统工程的原理和方法,对林业决策支持系统的设计模式进行了探讨。并提出了设计准则。实践表明,按照上述方法设计的林业决策支持系统,运行切实可靠,能达到预期目的。因而可供进行该系统设计时参考。     

刺槐种群生物量动态研究

研究了河北省太行山刺槐种群乔木层生物量、各组分量及种群密度的动态规律。结果表明，刺槐种群自人工造林伊始，其种群总生物量、各组分量、种群密度（断面积表示）即表现出速增性，约至１２ａ生达到峰值，基本符合Ｌｏｇｉｓｔｉｃ规律。此后随个体间竞争的加剧，自疏作用加强，种群呈不稳定状态，种群密度和生物量下降，由一个同龄纯林逐渐趋向于具有多代个体年龄结构稳定的群体，并使种群生物量回复到一个相对稳定水平。本文还建立了生物量及各组分量与种群年龄、密度的相关模型，及Ｗ～ｆ（Ａ，Ｇ，Ｈ）多元线性回归议程。     

Growth and yield models for uneven-sized forest stands in Finland

Uneven-sized forestry is gradually gaining popularity and acceptability also in the Nordic countries. This is because of the willingness of the public and some forest owners to avoid clear-fellings and pursue more near-nature forest structures. It has also been realized that the profitability of uneven-sized forestry may be competitive with even-aged forestry. In Finland, management of uneven-sized stands is hampered by the lack of information about the dynamics of such stands, and about the yield and profitability of uneven-sized forestry. This study developed models which allow managers to simulate the growth and yield of uneven-sized stands in Finland, making it possible to predict the yield and analyze the sustainability of different management options. The model set consists of individual-tree diameter increment, height and survival models, and a model for ingrowth. The modeling data consisted of two long-term field experiments of uneven-sized forest management, a set of temporary sample plots measured earlier for growth modeling purposes, and the sample plots of the third National Forest Inventory of Finland. The application area of the models covers all growing sites, all main tree species, and the whole surface area of Finland. According to the models, the sustainable harvest of a fertile (Oxalis-Myrtillus site) uneven-sized Norway spruce forest varies between 5.5 and 7 m³ ha⁻¹ a⁻¹ in Central Finland, depending on the length of the cutting cycle, stand density, and shape of the diameter distribution. It is profitable to harvest large diameter classes more heavily than small ones. Due to the large amount of data the models for diameter increment are highly significant and reliably show the growth level of trees in uneven-sized stands. The weakest models are the ingrowth models, which are based on a clearly smaller data set than the other models.     

金沙江干热河谷退耕还林与生态问题的研究

通过对金沙江干热河谷生态环境和经营条件详细分析，具体提出适合金沙江流域不同海拔和立地条件的退耕还林的技术模式，论述了经济林模式、生态林模式、用材林模式和林草混交立体模式的适用立地条件、造林树种、经营技术及经济效益。     

农林复合模式研究与进展

文章对农林复合经营模式的发展历史、经营类型进行了概述，对其系统结构、生物物种设计原则、生态、经济、社会效益以及今后研究的重点进行了探讨，为农林复合经营模式在实践中的推广和理论研究的深入进行提供了理论依据。     

Studies on Heavy Metal Pollution in Soil—Plant System：A Review

Heavy metal pollution in soil-plant system is of major environmental concern on a world scale and in China in particular with the rapid development of industry.The heavy metal pollution status in soil-plant system in China,the research progress on the bioavailability of heavy metals (effecting factors,extraction methods,free-ion activity model,adsorption model,multivariate regression model,Q-I relationship,and compound pollution),and soil remediation are reviewed in paper.Future research and monitoring is also discussed.     

基于分布式业务流程模型的建模方法分析

本文主要分析了在以Web Services为基础创建业务流程模型的过程中,如何进行分布式业务流程的元模型定义与模型中的消息管理及其方法,从而方便企业的业务整合,以实现企业资源的优化配置,从而适应复杂多变的商务环境。     

当前路面管理系统的主要问题及发展前景

通过对世界范围内路面管理系统的研究,总体介绍了路面管理系统的各发展阶段,并详细阐述了路面管理系统的实现、问题及其发展前景。     

物种或种群生态位宽度与生态位重叠的计测模型

提出生态位宽度和生态位重叠的新定义及其若干测度模型.对不同学者提出的许多测度生态位宽度和生态位重叠的模型进行分析和评述.迄今为止,在国内限于单一生态资源轴上的生态位参数计测研究很多,随着多维生态位计测方法的不断发展,物种或种群在多维生态空间内的生态位宽度和生态位重叠计测,将备受关注.