一种立体空间布局模型及布局算法

本文首先讨论了空间布局的同态变换求解思想，分析了基于长方体的立体布局的空间关系，借助图论中的某些概念，建立了一种立体空间布局模型ＳＯＳＧ图，给出了该模型表达立体空间布局的完备性与封闭性．本文还讨论了基于该模型的布局算法，简要介绍了该方法在计算机结构布局中的应用．

Ubiquitous环境下高校图书馆空间布局模型研究——以韩国延世大学三星图书馆为例

介绍了韩国延世大学新建的三星图书馆的整体空间布局情况以及人性化服务,以期对我国图书馆有所启示。

基于空间布局优化路径决策模型的山东半岛蓝区海水养殖空间布局优化研究

运用空间布局优化路径决策模型,以2010年为基期,对山东半岛蓝区2020年的海水养殖空间布局的最优比例进行求解,并计算得到了十年间海水养殖空间布局的优化路径。池塘、底播、浅海养殖的现状比例为48%、48%、4%,最优比例为38%、48%、14%;池塘养殖经过2%、2%、2%、5.3%、5.1%、4.7%、4.4%、4%、3.5%、2.9%的优化率,在2020年达到38%的最优占比;底播养殖经过前三年8.8%、8.5%、8.1%的优化比率在2013年达到最大占比51.4%之后连续七年经过5%的优化比率在2020年恢复至最优比例48%;浅海养殖连续十年经过20%的优化比率,最终达到14%的最优占比。经过十年不断的优化,池塘、底播、浅海的养殖面积在2020年都将会达到规划的理想面积1104935hm2、1405817 hm2、480893.6 hm2。

区域通用机场体系布局规划研究——以京津冀地区为例

通用航空机场体系科学合理的布局规划,对于建立健全一个区域通用航空产业链、提高区域通用航空发展水平和完善区域综合交通体系都具有重要的意义。目前,国内在通用机场选址和布局规划等方面虽然已有一定的研究基础,但没有系统地提出通用机场布局规划的完整理论方法体系。为避免区域发展过程中通用机场的重复建设、通用机场规划布局的无序性和盲目性、不合理布局造成的发展缓慢和核心竞争力弱等诸多深层次的问题,亟需对区域通用机场体系的布局进行系统、全面的理论和方法研究.

Assessment of Soil Erosion by Compensatory Hoeing Tillage in a Purple Soil

This study explores the role of a traditional tillage method,i.e.,compensatory hoeing,for sustainable agro-ecosystem management in the hilly areas of the Chongqing municipality,south-western China.To validate the effects of compensatory tillage on the terraced slopes,the tillage method of noncompensatory hoeing was conducted on a linear slope.To acquire information about 137 Cs inventories and soil texture,soil samples were collected by a core sampler with a 6.8-cm diameter at 5.0-m intervals along the toposequence and the linear slope in the dry season(March) of 2007.Meanwhile,a tillage erosion model was used for evaluating the spatial pattern of tillage erosion.The 137 Cs data showed that on the terraced slope,soil was lost from the upper slope,and soil deposition occurred at the toe slope positions on each terrace.As a result,abrupt changes in the 137 Cs inventories of soil were found over short distances between two sides of terrace boundaries.Results obtained from the tillage erosion model and the 137 Cs data indicate that soil redistribution mainly results from tillage erosion in the terraced landscape.Consecutive non-compensatory tillage caused soil redistribution on the linear slope,resulting in thin soil profile disappearing at the top and soil accumulating at the bottom positions of the linear slope.This result further validates that compensatory tillage could avoid the complete erosion of the thin soil layer at the summit position.Therefore,this traditional tillage.method,i.e.,compensatory tillage,has maintained the soil quality at the summit of the slope in the past decades.