装饰中的秩序感

无论变化与统一、对比与调和、节奏与韵律、放射与回旋,都表现了一种秩序性,秩序是装饰之美的尺度。秩序是装饰之美的内在尺度。秩序代表着和谐,代表着变化以及变化后的统一,它始终与稳定和永恒性相联系。     

建构主义学习理论的认识论特征分析

文章从激进建构主义和温和建构主义维度分析建构主义在认识论上的特征,接着分析了几种主要学习理论的认识论特点,指出从认识论角度看,建构主义是一种既不同于主观主义也不同于客观主义的第三种认识论,是一种介于主观主义和客观主义之间的认识论。最后分析建构主义学习理论作为教育技术学理论基础时应注意的问题。     

Characterization and photocatalytic activity of mixed nanocrystalline TiO<Subscript>2</Subscript> powders prepared by xerogel-hydrothermal method in different acid solutions

TiO₂ nanoparticles(NPs)were prepared via the hydrothermal route of TiO₂ xerogel in nitric acid, hydrochloric acid and acetic acid. The physico-chemical properties of the powders were characterized by X-ray diffraction(XRD)and N₂ adsorption desorption techniques. The effects of the different acids on the structure(crystal phase)and texture(primary particle size and porosity)of the TiO₂ powders were explored. Results indicated that acetic acid facilitated the formation and stability of pure anatase phase. On the other hand, nitric acid and hydrochloric acid led to the transformation from anatase to rutile. The catalyst synthesized via the hydrothermal route of TiO₂ xerogel in the low concentration hydrochloric acid solution(Ti-HCl-0.15)had the highest photocatalytic activity than the catalysts obtained in the other two acid solutions. The effects of the different acids were discussed in terms of acid strength, chelating effect and the thermal stability of the adsorbed acidic anions.     

服务语言的使用原则

作为工作用语的服务语言,在客我交往活动中,必须表现出明确的服务目的性,因而有别于人们日常的交际语言.从业人员使用服务语言,符合规范性,保持文明礼貌,并与语境相适应,必须进行严格的自我调整和控制.     

大学的城市城市的大学——"三区"联动之同济模式研究

科教兴市战略的提出,需要大力发挥高校在城市发展与建设中的作用。“三区”联动即以大学校区为依托,以科技园区为平台,以资源在公共社区的集聚、共享、融合为抓手,是落实科教兴市战略的具体策略。以同济大学为例,分析大学在“三区”联动过程中存在的问题和障碍,进而提出针对性的解决措施。     

激发探究兴趣 培养创新能力

现代学习方式是一个多维度、多层次的开放系统，基于地理课程理念和目标，文章就如何激发学生的探究兴趣，培养擘生的创新能力加以探讨：①创设教学情境，激发探究兴趣。②重视实践合作，培养创新能力。③发展信息教学，培养创新人才。     

Interaction between supply chain risk and organizational performance

To offer a theoretic guidance to practice, on the basis of the work in an emerging strand of supply chain management and by matching the constructs of performance and risk together, a framework between supply chain risk management and organizational performance is developed. The framework includes a series of mutually associated processes as follows: risk sources and profiles, risk and performance drives, risk and performance consequences, risk management responses, and risk and performance outcomes. Furthermore, every process is elaborated on in detail. Thereinto, organizational performance consists of efficiency and effectiveness which is linked to risk drivers and risk management responses. Finally, some necessary discussions and supplements are put forward from a practical point of view. This study is to some extent expected to be conducive to the theories and the practice of supply chain management for contemporary enterprises.     

创业教育：职业学校推进半工半读教育模式的新途径

创业教育是当前职业教育的一个新思路.文章首先分析了职业教育半工半读模式中存在的一些现实问题,进而指出创业教育是解决这些问题的一个有效途径.然后,分别从教育类型、课程设置和师资队伍建设等三个方面,对如何构建半工半读模式中的创业教育体系问题进行了详细阐述.最后,进一步指出只有通过全社会的共同努力,才能真正将创业教育模式有效地推行下去.     

开放边界条件下的无控制三岔路交通流的研究

文章以改进的NS模型为基础,建立了无控制三岔路模型,通过数值模拟,研究了在开放边界条件下,安全距离,刹车概率共同作用时交通流所呈现的特点。     

An integrated cognitive computing approach for systematic conceptual design

Conceptual design plays an important role in product life cycle, which requires engineers to use sound design theory, cross-disciplinary knowledge, and complex technical support to acquire design concepts. However, the lack of sufficient computational tools makes it difficult for designers to fully explore in the wide design solution spaces. Therefore, this paper proposes an integrated cognitive computing approach to formalize the cognitive activities of conceptual design. A cognitive computing model composed of concept associative memory, concept generation, and decision-making process is established based on the integration of cognitive psychology and engineering design. First of all, the Hopfield neural network is used to acquire similar concept solutions for specific subfunctions from a knowledge base. Then, morphological matrix and genetic algorithm are introduced to produce a set of feasible candidate solutions in the concept generation process. Furthermore, a technique for order preference by similarity to an ideal solution is applied to evaluate the generated concept solutions and obtain the optimal solution automatically. Finally, a case study is given to demonstrate the effectiveness and efficiency of the proposed approach.