草花在住宅景观中的运用

随着生活水平的不断提高，人们对居住环境的要求也日益提升，室外景观不但要满足功能需求，还要具有观赏价值。本文将从草花在住宅景观中的运用着手展开讨论。     

超大城市行政区气候环境敏感性多尺度 影响机制可视化与对策研究——以北京市 丰台区为例

气候环境研究具有多尺度层级的特征，城市气候环境改善需要从不同尺度关注不同层面问题，已有诸多研究成果表明，城市物理环境对气候改善具有决定性作用。以存量时代城市更新改造为背景，从“多尺度”视角切入，重点关注城市气候环境改善在不同尺度层级的途径与方法，共同指导城市更新改造的具体操作。以北京市丰台区为研究对象，利用城市环境气候地图分析城市片区内气候环境敏感性分级。首先，对建成环境影响要素进行综合分析，结果显示，丰台区中部气候环境敏感性高的区域，其建筑密度大、建筑高度高、植被覆盖率低、路网密度高。其次，引入网格化分割降级气候环境分析尺度，将敏感单元落在城市街区尺度内，研究得到丰台区5个气候高敏感片区，其中4个为批发市场城市功能，具有典型性。最后，针对典型敏感片区建成环境特征，总结街区改造策略，提出多尺度气候环境分析的重要性，以及基于微气候改善的精细化途径，这是存量时代城市应对气候环境变化的有效方案。     

State‐space characterization of all solutions to a positive real control problem

Abstract

The purpose of this paper is to give a state‐space characterization of all internally stabilizing finite‐dimensional linear time‐invariant output feedback controllers for a given finite‐dimensional linear time‐invariant plant which ensure that the resulting closed‐loop transfer function is extended strictly positive real(ESPR). All such controllers are parameterized by a fixed linear fractional transformation with an ESPR, stable free parameter. The parameterized controllers have a state dimension not less than that of the open‐loop plant. The development uses only elementarily algebraic ideas beginning with a change of variables, an extended version of Kalman‐Yacubovich‐Popov positive real lemma, and Youla parameterization, thus the proofs given are simple and clear.     

Color separation for colored fiber blends based on the fuzzy C‐means cluster

Colored fibers can be blended in a certain proportion to achieve a specific color. It is a very hard task for the colorist to find a good recipe to meet the final product without the aid of computer. In this article, a color separation method for the colored fiber blends is discussed to substitute for some manual work. The fuzzy C‐means cluster is a way to group the color in the colored fiber blends image. The distance index, which is a key factor during the fuzzy C‐means cluster process, is calculated in the RGB color space and the HSV color space with some transformation. The final experiment result proved that the colors of each pixel in the blends' image can be replaced by corresponding cluster center associating colors in the HSV color space, and the main texture as well as the main color information about the fibers in the image is preserved. © 2011 Wiley Periodicals, Inc. Col Res Appl, 2012     

Adaptive Discretization for Computerized Tomography

Two adaptive discretization frameworks are tested for computerized tomography (CT) data reconstruction. Removal of inactive pixels is primary motivation. Efficient and user independent entropy optimized masking is employed for spatial filtering purposes. Density of nodes at high gradient of reconstructed physical property is used as adaptation criterion. An alternative option, independent from noisy projection data and nature of the physical properties, is also discussed. Sensitivity analysis between the uniform and nonuniform (evolved via adaptive route) reconstruction grid reveals the utility of nonuniform grids. Iterative and transform based reconstruction techniques are used. Outcomes are tested successfully on three real world projection data from two different compact CT setups and one commercial high-resolution micro-CT scanner.     

Framework for computationally efficient optimal crop and water allocation using ant colony optimization

A general optimization framework is introduced with the overall goal of reducing search space size and increasing the computational efficiency of evolutionary algorithm application to optimal crop and water allocation. The framework achieves this goal by representing the problem in the form of a decision tree, including dynamic decision variable option (DDVO) adjustment during the optimization process and using ant colony optimization (ACO) as the optimization engine. A case study from literature is considered to evaluate the utility of the framework. The results indicate that the proposed ACO-DDVO approach is able to find better solutions than those previously identified using linear programming. Furthermore, ACO-DDVO consistently outperforms an ACO algorithm using static decision variable options and penalty functions in terms of solution quality and computational efficiency. The considerable reduction in computational effort achieved by ACO-DDVO should be a major advantage in the optimization of real-world problems using complex crop simulation models.     

人性化的城市交通空间规划设计实践

长期以来,我国城市交通围绕小汽车为核心发展,对行人、自行车、公共交通等方面的关注不够,交通系统的人性化亟需完善和提升。尽管近年来随着绿色交通的兴起,交通系统的人性化逐渐被重视和关注,但人性化的交通体系规划建设仍然面临很大的挑战。本文从交通基础设施建设、交通使用者、城市管理者三个方面分析了人性化交通系统发展面临的困境,从宏观、中观、微观三个层面提出了构建人性化交通空间的对策和建议。     

山东省精神卫生中心病房教研综合楼建设特色

针对山东省精神卫生中心病房教研综合楼建设特色进行了分析,分别阐述了该病房教研综合楼的安全特色,人文特色,科学特色,对今后同类精神卫生工程项目设计具有一定指导意义。     

苏州留园昆曲观演空间研究

江南园林昆曲观演空间是园林空间与昆曲艺术长期相互作用的产物,具有极高的文化、艺术和研究价值。文章选择苏州留园内的三处昆曲观演空间,利用文献阅读、实地测绘、场景复原等方法,从尺度意境、空间组合、视线组织和昆曲活动等方面进行分析和解读,探索了园林空间与昆曲活动的具体作用机制。留园内三处昆曲观演空间的物理特征与昆曲活动各有特色,呈现出不同的相互作用关系;昆曲活动和三处昆曲观演空间都具有极高的匹配度,通过长期的磨合形成一致的风格趋向,构成了具有鲜明时代特征的昆曲观演空间。     

追求“德”“民”,追寻“至善”——河南大学国际学院校园规划构思谈

本文通过河南大学校园的规划实践,着重分析地域文化、历史文化、校园精神的传承与创造。规划将校园看作一个文化场所,通过校园整体布局结构、空间意象、交通流线、场所环境、绿化景观和建筑布局彰显河南大学国际学院所承载的黄河文化、河南地域文化、郑州现代科技实力和河大百年积淀的历史传统。用校园环境再次诠释"明德新民、止于至善"的校训在新的社会经济背景下的深刻内涵。