导致这一演替的主要原因为作物布局、耕作制度、栽培方法、管理技术的变化和农药化肥的过量施用。
The main reason for this succession might be the changes in crops distribution, cultivation type, planting method, management technique and over-use of chemical pesticides and fertilizers.
其次是规划设计阶段对场地分区规划方法、场地布局模式、材料的选择与临时性技术措施。
Secondly, in the stage of planning and designing, the method to plan the area, the layout mode of the site, the selection of materials and the temporary technical measures, are researched.
介绍了基于成组技术的制造单元构成方法、在单元内对设备进行布置及单元在车间内布局的方法。
Introduces the methods of composition of manufactory cell, facility layout in the cell and the cell layout in the plant.
本文针对制造系统布局问题研究了制造单元设备布局方法和布局方案的可视化及运行仿真技术。
The researches in this thesis are facility layout, visualization and process simulation of manufacturing Cell according to the layout problem of manufacturing system.
协助评估及完善制造方法，工艺布局，设备以及技术。
Assists in evaluating and improving manufacturing methods, layouts, equipment and techniques.
首先，本文阐述了基本的车间布局理论与技术，包括车间布局问题的定义，车间布局的要素、原则与分类，布局方案的评价方法。
First, the basic theories and technologies of plant layout will be narrated, including the definitions, elements, principles, classifications and the method used to estimate a plant layout solution.
本文应用GIS技术来获得大兴安岭林区塔源林场合理的森林资源开发利用布局和减少浪费森林资源的新方法。
In this paper, with the help of GIS, we analyzed the structure characteristics, dymunic process and factors which result in failuxe of forest resources sustainatsle development, in Tayuan forest farm.
本文应用GIS技术来获得大兴安岭林区塔源林场合理的森林资源开发利用布局和减少浪费森林资源的新方法。
In this paper, with the help of GIS, we analyzed the structure characteristics, dymunic process and factors which result in failuxe of forest resources sustainatsle development, in Tayuan forest farm.
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