Based on the unascertainty of river water environmental system , the unascertained mathematics theory was used to research the issue of water environmental carrying capacity , and to assess the risk that corresponds to different discharge levels 摘要从水环境系统的未确知出发，运用未确知数学理论对河流水体纳污能力及其风险问题进行研究。
The green technology took one kind the new environment friendly technology which coordinates with the ecological environment system , its development and the application realizes the sustainable developmental strategy important way 绿色技术作为一种与生态环境系统相协调的新型环境友好技术,其发展和应用是实现可持续发展战略的重要途径。
Compared to traditional management , this alternating decision strategy considering the influence of non - linear characteristics related to environmental system will achieve rapid environmental improvements with less available budgets 与传统的环境管理或规划相比，这种?虑环境系统有关非线性特徵影响的投入策略可以达到用较少的经费获得迅速的环境改善。
The urban resource - environment system is a dissipative structure with the characteristics as follows : openness , far from equilibrium , complicated non - linear interaction within the system , fluctuation and abrupt change 广义的城市资源与环境系统是一个耗散结构系统，具有如下特点：开放、远离平衡、系统内部存在复杂的非线性相互作用、存在涨落与突变。
So we analyze the characteristics of nves , discuss the specialties of human behaviors in the virtual environments . and after that we bring forward the am - neven , an awareness model for networked virtual environments 因此，我们分析了网络虚拟环境系统的特点，依据人在虚拟环境中的行为和感知特性，提出了am - neven ( awarenessmodelfornetworkedvirtualenvironments )模型。
This article divides the environmental system of mining area into three parts that are solid waste , water and atmosphere by means of system dynamics that is an effective tool of studying complicated problem and complicated system 摘要以研究复杂问题和复杂系统的有效工具系统动力学为手段，把矿区环境系统分成固体废物、水和大气三部分，建立了矿区环境系统动力学仿真模型。
In the process of economic development , human economic system and ecological system inevitably affect each other . man ' s irrational action disturbs ecological system , so the cost of economic development is unavoidable 在经济发展过程中，人类经济系统和生态自然系统之间必然存在相互影响，人类的集体非理性行为必然造成对生态环境系统的干扰，因而经济发展成本是不可避免的。
Research on the complexity of the urban resource - environment system is fundamental at home and abroad . the work made in this paper is very coarse and not perfect . there is a will that this paper would bring forth much more researches 城市资源与环境系统复杂性研究在国内外还处于起步阶段，本文所做的工作还很粗糙和不成熟，希望能够起到抛砖引玉的作用，推动更多更深入的研究。
