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A decision-making model of development intensity based on similarity relationship between land attributes intervened by urban design

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Science China(Technological Sciences) 2010年第7期53卷 1743-1754页

作者： WANG JianGuo1, ZHANG Yu2 & FENG Han3 1 School of architecture, Southeast university Key Laboratory for Urban and Architectural Heritage Conservation, Ministry of Education, Nanjing 210096, China 2 School of architecture, Southeast university, Nanjing 210096, China 3.faculty of architecture, delft university of technology, 2628 cr delft, netherlands Key Laboratory for Urban and Architectural Heritage Conservation Ministry of Education Nanjing China School of architecture Southeast University Nanjing China faculty of architecture Delft University of Technology Delft Netherlands

The paper presents a dynamic model intervened by urban design for the decision-making of land development intensity, which expresses the inherent interaction mechanism between lands based on the evaluation of land attributes and their similarity relationship. Each land unit is described with several factors according to their condition and potential for development, such as land function, accessibility, historical site control, landscape control, and so on. Then, the dynamic reference relationship between land units is established according to the similarity relationship between their factors. That means lands with similar conditions tend to have similar development intensities, which expresses the rule of the spontaneous urban development. Therefore, the development intensities of the pending lands can be calculated by the confirmed ones. Furthermore, the system can be actively intervened by adjusting the parameters according to urban design or planning intentions. And the reaction of the system offers effective support and reference for reasonable decision. The system with multiple intervention input is not only a credible tool for deriving development intensities, but also a platform to activate urban design conception. Above all, the system as a socio-technical tool integrates the optimization of form, function and environment, and embodies the principle of impersonality, justice and flexibility in the decision of land development intensity.

关键词： land development intensity urban design land attribute similarity relationship complex system FAR

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Cement Treated Recycled Demolition Waste as a Road Base Material

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Journal of Wuhan university of technology(Materials Science) 2010年第4期25卷 696-699页

作者：玄东兴 Road and Railway Engineering Faculty of Civil Engineering and Geosciences Delft University of Technology 2628 CN Delft the Netherlands

To enhance the performance of mix granulate road base courses by cement treatment. The mechanical properties of cement treated mix granulate （CTMG） were studied, which was designed with 65% crushed masonry and 35% crushed concrete by mass. The central composite design was employed to prepare specimens with different levels of cement content and degree of compaction. All specimens were cured in a fog room at 20 ℃ for a specific number of days. The compressive strength and the indirect tensile strength were determined through the monotonic compression and indirect tension tests. Effective prediction models for the mechanical properties of CTMG, in relation to the cement content, the degree of compaction and the curing time, were successfully established for a mix containing 65% crushed masonry and 35% crushed concrete by mass.

关键词： recycled masonry crushed concrete road base cement treated mix granulates mechanical properties

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A Novel Method for Evaluating Fatigue Properties of Bonding Layers Used in Bridge Deck Pavement

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Journal of Wuhan university of technology(Materials Science) 2009年第2期24卷 330-332页

作者：周杰 School of Materials and Engineering Wuhan University of Technology

A new method was used to evaluate the fatigue properties of the bonding layer used in the bridge deck pavement. The shear fatigue test of three bonding layers was conducted on a dynamic shear rheometer（DSR）. The fatigue formulas were gained for these layers. The experimental results indicate that, at the same torque level or at the same frequency, neoprene latex asphalt bonding layer exhibits excellent fatigue performance when compared to other two bonding layers.

关键词： asphalt bonding layer shear fatigue dynamic shear rheometer

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Modelling of Time Dependency of Chloride Diffusion Coefficient in Cement Paste

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Journal of Wuhan university of technology(Materials Science) 2010年第4期25卷 687-691页

作者：张明中 Microlab Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 2628 CN Delft The Netherlands

A computer-based model and method was presented to predict the time dependency of chloride diffusion coefficients in cement paste. The HYMOSTRUC3D model was applied to generate a 3D representative elementary volume （REV） of cement paste. In the simulation of microstructure, both of cement hydration and chloride binding were considered. With the simulated microstructure of cement paste, the finite element method was applied to simulate the diffusion process of chloride through the saturated cement paste. Based on the Fick’s first law, the chloride diffusion coefficient can be calculated. In this method, the influences of age and w/c ratio on the chloride diffusion coefficient were evaluated. The simulated chloride diffusivities with various w/c at different time were compared to experimental data obtained from the literature. The experimental results indicate that the chloride diffusion coefficient decreases with the increase of time and the decrease of w/c ratio. The trend of simulated relationship （diffusion coefficient vs time, diffusion coefficient vs w/c ratio） fits very well with the experiments.

关键词： cement paste time dependency chloride diffusion coefficient chloride binding HYMOSTRUC3D

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黄河流域水体计算的改良研究

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人民黄河 2012年第10期34卷 10-11页

作者： GAO Yao(delft university of technology,faculty of CITG,Department of Water Management,Section Water Resources Stevinweg 1,2628 CN delft,netherlands) 代尔夫特科技大学水资源管理学院土木工程系水利组

为解决水资源面临的问题,在过去很长一段时间内,水体分析和水资源管理工作存在误区。传统上,对水体的认识仅局限于蓝色水体资源,而事实上占全球淡水资源2/3的绿色水体在人类可用水源中具有举足轻重的作用,对于水资源匮乏的地区来讲,尤... 详细信息

为解决水资源面临的问题,在过去很长一段时间内,水体分析和水资源管理工作存在误区。传统上,对水体的认识仅局限于蓝色水体资源,而事实上占全球淡水资源2/3的绿色水体在人类可用水源中具有举足轻重的作用,对于水资源匮乏的地区来讲,尤是如此。关键的问题在于,由于绿色水体的蒸发和转化过程复杂,难以分析评估其具体流量。但是,随着卫星技术和气象事业的发展,越来越多的地质学、气象学和水力学的信息被收集,这些信息的汇总促进了水体分析的飞速发展。同时,以此为基础,在升级的水体核算框架(WA+)上开发的水体计算程序,强调根据不同土地使用级别计算绿色水的消耗量,因此其在分析计算水资源空间分布上有更加实际的意义。降水量和蒸发量是WA+最主要的两个参数,根据两者之差可判断当地水资源和水能条件是否过剩或不足。由于蓝色水体流量接近区域内降水量与蒸发量之差,因此可从两方面入手:分别使用以卫星数据为参考的远程遥感法和以多重气候数据分析为基础的水汽复合法得到降雨量与蒸发量差值表。同时,结合下垫面信息,得出:对于不同地形地貌下的水体系统,风险存在几率和实施应对策略的可行性和必要性与上述计算结果是有密切关系的。鉴于黄河的水量供需严重失衡及其在中国水系中的重要地位,本研究围绕黄河流域展开。

关键词：水体计算黄河水资源管理

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Effect of MSWI Fly Ash and Incineration Residues on Cement Performances

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Journal of Wuhan university of technology(Materials Science) 2010年第2期25卷 312-315页

作者：李相国 Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education Wuhan University of Technology

The activities of municipal solid waste incineration （MSWI） fly ash and incineration residues were studied contrastively, through the component analysis and the activity ratio tests. The mechanical properties, hydration mechanism and leaching toxicity of the hardened cement paste mixing with MSWI fly ash and incineration residues were investigated. The experimental results indicated that the active constituents （CaO＋Al2O3＋Fe2O3） in MSWI fly ash were higher than those in incineration residues. Therefore the activity ratio of MSWI fly ash was 43.58%, twice as much as that of incineration residues. Meanwhile, the hydration of cement was delayed by mixing with MSWI fly ash and incineration residues, which also reduced the cement strength markedly. By adding with exceeding 20% MSWI fly ash, the specimens expanded and microcracks appeared. The leaching toxicities of cement pasted mixed with MSWI fly ash and incineration residues were lower than the Chinese national standard. Accordingly the cement mixed by MSWI fly ash and incineration residues can be considered as the environment-friendly materials.

关键词： MSWI fly ash incineration residues activity ratio leaching toxicity

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Fatigue Performance of Bridge Deck Pavement Materials

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Journal of Wuhan university of technology(Materials Science) 2009年第2期24卷 318-320页

作者：吴少鹏 Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education Wuhan University of Technology

Three beam samples of bridge deck pavement were prepared, with gradation types of AC-13, and AC-16 and combined AC-13＋AC-16. Four-point bending test was adopted to investigate the fatigue performance of these beam samples. The experimental results indicate that the initial bending stiffness is related to the type of beam sample samples decreases as the increase of the controlled strain fatigue resistance and bigger limiting bending strain at pared with single beam sample, the fatigue performance and testing temperature. Fatigue life of these level. The AC-13 beam sample exhibits better the given strain level and temperature. Corn- of combining beam samnle is relatively poor.

关键词： bridge deck pavement beam sample four-point bending test fatigue

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THEORY OF COMBINATION OF ELASTO-PLASTICITY AND crACKING ON THE BASIS OF LARGE STRAIN ASSUMPTION

THEORY OF COMBINATION OF ELASTO-PLASTICITY AND CRACKING ON T...

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中国计算力学大会'2010（CCCM2010）暨第八届南方计算力学学术会议（SCCM8）

作者： Jinlong Li delft university of technology,faculty of Civil Engineering,The netherlands

Simulations of elastoplastic,viscoelastic or elasto-visco-plastic materials were done a lot in constitutive ***,there is a great variety of engineering materials which,depending on strain rate and/or temperature,exhibit response characteristics varying anywhere between the elasto-plastic and viscoelastic *** are many materials behave as elasto-plasticity first,when the deformation gradient reach some value cracking *** multiplicative decomposition method is the main trend for finite element analysis of plasticity with large strains *** this paper,the apply of this method to solve problems of elasto-plasticity and cracking is *** this theory,implementations in computational method can be easily done with variety of programming languages.

关键词： multiplicative decomposition deformation gradient finite element energy based model

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A mathematical model for concept granular computing systems

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Science China(Information Sciences) 2010年第7期53卷 1397-1408页

作者： QIU GuoFang1, MA JianMin2, YANG HongZhi3 & ZHANG WenXiu3 1School of Management, Xi’an university of architecture & technology, Xi’an 710055, China 2faculty of Science, Chang’an university, Xi’an 710064, China 3faculty of Science, Xi’an Jiaotong university, Xi’an 710049, China School of Management Xi’an University of Architecture & Technology Xi’an China faculty of Science Chang’an University Xi’an China faculty of Science Xi’an Jiaotong University Xi’an China

Extent-intent and intent-extent operators are introduced between two complete lattices in this paper and a mathematical model for concept granular computing system is established. We proved that the set of all concepts in this system is a lattice with the greatest element and the least element. This framework includes formal concept lattices from formal contexts, L fuzzy concept lattices from L fuzzy formal contexts and three kinds of variable threshold concept lattices, i.e. the extension and the intension of a concept are a crisp set and a crisp set, a crisp set and a fuzzy set, a fuzzy set and a crisp set, respectively. Finally, some iterative algorithms for constructing concepts are proposed and they are proved to be optimal concepts under some conditions in this system.

关键词： granular computing formal concept analysis concept lattice mathematical model

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The structure of L*-inverse semigroups

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Science China Mathematics 2006年第8期49卷 1065-1081页

作者： REN Xueming & SHUM Karping Department of Mathematics, Xi’an university of architecture and technology, Xi’an 710055, China faculty of Science, The Chinese university of Hong Kong, Hong Kong, China Department of Mathematics Xi'an University of Architecture and Technology Xi'an 710055 China faculty of Science The Chinese University of Hong Kong Hong Kong Hong Kong

The concepts of L*-inverse semigroups and left wreath products of semigroups are introduced. It is shown that the L*-inverse semigroup can be described as the left wreath product of a type A semigroupΓand a left regular band B together with a mapping which maps the semigroupΓinto the endomorphism semigroup End(B). This result generalizes the structure theorem of Yamada for the left inverse semigroups in the class of regular semigroups. We shall also provide a constructed example for the L*-inverse semigroups by using the left wreath products.

关键词： L*-inverse semigroups type A semigroups left regular bands left wreath products.

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