高宽比对生态复合墙体破坏模式的影响

生态复合墙体是生态复合墙结构的主要受力构件,其破坏模式不单一。高宽比是影响墙体破坏模式的重要因素之一。在不同高宽比生态复合墙体试验研究的基础上,介绍了墙体破坏机理及破坏模式,对比分析了不同高宽比墙体破坏模式及原因,建立非线性有限元模型,对不同高宽比墙体破坏模式进行分析。结果表明:生态复合墙体破坏模式本质上由复合墙板及边框柱的相对强弱决定,对于填充加气混凝土砌块生态复合墙体,当墙体高宽比<1.5时,墙体发生合理的剪切型破坏;对于填充秸秆泥坯砖生态复合墙体,当墙体高宽比<1.7时,墙体发生剪切型破坏。研究结果对于生态复合墙体的抗震优化设计具有一定的参考意义。更多还原     

浅析Observer模式在GIS软件设计中的应用

面向对象方法仅仅从问题域的离散抽象很难达到高内聚和低耦合,设计模式的出现和广泛应用为解决这个问题提供了有效的方法.探讨了Observer模式的基本原理以及在GIS软件设计中的应用,并在具体实践中做了有益尝试.实践证明了设计模式在改善软件的灵活性和适应性方面所发挥的积极作用.     

Environmental sustainability assessment of buildings in hot climates: the case of the UAE

Sustainability has acquired great importance due to the negative impact of various developments on the environment. The rapid growth during the last decade has been accompanied by active construction which, in some instances, neglected the impact on the environment and human activities. The impact of developments on the traditional heritage has not been taken into consideration although the latter represents a rich resource for sustainable building practices. The study aims at examining these developments in the UAE using an assessment tool that measures the performance of buildings in terms of their sustainability. This study attempts to: (a) develop a comprehensive definition of sustainability to suit UAE needs; (b) classify sustainable building practices at international and regional levels; (c) assess building performance in the UAE; and (d) establish guidelines for future sustainable architecture. T-Sol software was used to predict the CO₂ emission level in selected buildings in the UAE. Results illustrate that average energy use/area in domestic buildings is high (213 kWh/m²) and public buildings showed less sustainable measures in terms of energy features, energy performance and environmental features. Issues considered in the assessment of buildings such as energy use per square metre and CO₂ emission are alarming. Traditional buildings in the UAE were more sustainable than contemporary buildings, however.     

Extended vertical lists for temporal pattern mining from multivariate time series

In this paper, the problem of mining complex temporal patterns in the context of multivariate time series is considered. A new method called the Fast Temporal Pattern Mining with Extended Vertical Lists is introduced. The method is based on an extension of the level‐wise property, which requires a more complex pattern to start at positions within a record where all of the subpatterns of the pattern start. The approach is built around a novel data structure called the Extended Vertical List that tracks positions of the first state of the pattern inside records and links them to appropriate positions of a specific subpattern of the pattern called the prefix. Extensive computational results indicate that the new method performs significantly faster than the previous version of the algorithm for Temporal Pattern Mining; however, the increase in speed comes at the expense of increased memory usage.     

Striking Patterns: Contemporary Ikat Design and Its Future

This review presents the results of a conference on ikat textiles organized in the context of the exhibition Striking Patterns: Global Traces in Local Ikat Fashion at the Museum der Kulturen Basel, Switzerland (October 2016 to March 2017). Academics and professional experts, some of them working for NGOs, debated often neglected potentialities as well as the future of contemporary ikat design and other intricately patterned handwoven textiles: the significance of new patterns; intellectual property rights; and educational encouragement. The general focus lay on the controversially perceived innovation of textile patterns in Indonesia and Timor-Leste. We will here present the main arguments of the discussion and our own suggestions for further research.     

高能耗企业生产能耗过程可视化建模软件设计与实现

针对企业生产能耗过程仿真优化的实际需求,依据企业生产能耗过程的物料流、能源流、信息流、排放流"四流"合一的耦合建模思想,基于面向对象的设计模式方法和ILOG图形化技术,介绍了离散制造企业生产能耗可视化建模工具的软件架构方法,及利用C#编程实现企业生产能耗耦合过程模型及生产能耗参数化设备模型的可视化方法。     

论明代青花瓷鸟纹的审美特征与文化内涵

鸟纹是明代青花瓷装饰题材中的重要组成部分,在明代各时期有着不同的发展轨迹,具有丰富的审美特征和文化内涵。从审美特征来看,明代青花瓷鸟纹具有装饰之美、神韵之美、自然之美三大特征;从文化内涵来看,明代青花瓷鸟纹具有吉祥寓意、文人旨趣、时代思潮等内涵。     

Enhanced process comprehension and quality analysis based on subspace separation for multiphase batch processes

Phase‐based subpartial least squares (subPLS) modeling algorithm has been used for online quality prediction in multiphase batches. It strictly assumes that the X – Y correlations are identical within the same phase so that they can be defined by a uniform regression model. However, the accuracy of this precondition has not been theoretically checked when put into practical application. Actually it does not always agree well with the real case and may have to be rejected for some practical processes. In the present work, it corrects the “absolute similarity” of subPLS modeling by a more general recognition that only one part of the underlying correlations are time‐wise common within the same phase while the other part are time‐specific, which is referred to as “partial similarity” here. Correspondingly, a two‐step phase division strategy is developed, which separates the original phase measurement space into two different parts, the common subspace and uncommon subspace. It is only in the common subspace where the underlying X – Y correlations are similar, a phase‐unified regression model can be extracted for online quality prediction. Moreover, based on the subspace separation, offline quality analyses are conducted in both subspaces to explore their respective cumulative manner and contribution in quality prediction. The strength and efficiency of the proposed algorithm are verified on a typical multiphase batch process, injection molding. © 2010 American Institute of Chemical Engineers AIChE J, 2011     

Transversal thermal patterns in packed‐bed reactors with simple kinetics: Bifurcation criterion and simulations

We derive a new criterion for transversal instability of planar fronts based on the bifurcation condition dV_f/dK|_K=0 = 0, where V_f and K are the front velocity and its curvature, respectively. This refines our previously obtained condition, which was formulated as α = (ΔT_adPe_T)/(ΔT_mPe_C) > 1 to α > 1 + |δ|, where ΔT_ad and ΔT_m are the adiabatic and maximal temperature rise, respectively, Pe_C and Pe_T are the axial mass and the heat Pe numbers, respectively, and δ is a small parameter. The criterion is based on approximate relations for ΔT_m and V_f, which account for the local curvature of a propagating front in a packed bed reactor with a first‐order activated kinetics. The obtained relations are verified by linear stability analysis of planar fronts. Simulations of a simplified 2D model in the form of a thin cylindrical shell are in good agreement with the critical parameters predicted by dispersion relations. Three types of patterns were detected in simulations: “frozen” multiwave patterns, spinning waves, and complex rotating–oscillating patterns. We map bifurcation diagrams showing domains of different modes using the shell radius as the bifurcation parameter. The possible translation of the 2D cylindrical shell model results to the 3D case is discussed. © 2010 American Institute of Chemical Engineers AIChE J, 2011     

模糊形态联想记忆网络及其在细胞图像联想识别中的应用

研究了模糊形态双向联想记忆网络（FMBAM）在灰度图像处理中的方法,并利用核的形式来解决灰度图像含随机噪声的正确联想记忆及识别问题,提出了构造灰度图像的核需要满足的条件,给出了寻找核的方法和途径,并应用于细胞图像的联想和识别,通过仿真实验,验证了该方法的有效性和良好性能.