国内外城镇化与生态环境协调关系动态研究

为探讨当今城镇化与生态环境的研究重点和方向,进一步丰富城镇化与生态环境协调发展的研究理论,促进城镇化、生态环境健康发展。本文通过系统梳理国内外城镇化与生态环境协调关系的理论与实证研究文献,分析目前研究现状与存在的主要问题。指出在城镇化和生态环境指标的构建上有待进一步完善、研究维度上有待进一步深化、研究尺度上有待进一步拓展,进一步明晰了城镇化与生态环境高质量发展路径,为未来该领域理论完善提供借鉴。     

主动网络中一致执行环境的研究

执行环境的结构组成直接影响主动节点对主动信包的处理性能，本文试图给出一种新型的执行环境实现方案．在分析了当前执行环境存在弊端的基础上，运用组件思想提出了一种一致性执行环境的框架模型．其核心思想是：使得接口与实现相分离，实现语言无关性以及利用组件构建执行环境和主动应用．该模型能够较好的克服当前执行环境EE存在的弊端，提高主动网络的整体性能．     

异构云DCN中绿色虚拟算法设计

为进一步提升异构云数据中心网络(DCN)动态管理的科学性,在总结当前主流研究局限性的基础上构思一种基于全局相对最优化的绿色虚拟算法.算法综合考虑虚拟机迁移过程中可能涉及到的诸多客观因素,通过科学地规划时间门限、主机筛选策略、以及精度比较机制对虚拟机实施高效的迁移.数据考察表明,所部署的算法不仅可快速精确地物色到最适宜的...     

An approach to accidents modeling based on compounds road environments

The most common approach to study the influence of certain road features on accidents has been the consideration of uniform road segments characterized by a unique feature. However, when an accident is related to the road infrastructure, its cause is usually not a single characteristic but rather a complex combination of several characteristics. The main objective of this paper is to describe a methodology developed in order to consider the road as a complete environment by using compound road environments, overcoming the limitations inherented in considering only uniform road segments. The methodology consists of: dividing a sample of roads into segments; grouping them into quite homogeneous road environments using cluster analysis; and identifying the influence of skid resistance and texture depth on road accidents in each environment by using generalized linear models. The application of this methodology is demonstrated for eight roads. Based on real data from accidents and road characteristics, three compound road environments were established where the pavement surface properties significantly influence the occurrence of accidents. Results have showed clearly that road environments where braking maneuvers are more common or those with small radii of curvature and high speeds require higher skid resistance and texture depth as an important contribution to the accident prevention.     

禹门口提水工程基坑开挖控制爆破

该项工程的开挖爆破中,采用塑料导爆管非电起爆技术等措施,成功地解决了复杂环境条件下的爆破安全问题,为同类工程施工提供了可借鉴的经验。     

Business intelligence success: The roles of BI capabilities and decision environments

This study examines the role of the decision environment in how well business intelligence (BI) capabilities are leveraged to achieve BI success. We examine the decision environment in terms of the types of decisions made and the information processing needs of the organization. Our findings suggest that technological capabilities such as data quality, user access and the integration of BI with other systems are necessary for BI success, regardless of the decision environment. However, the decision environment does influence the relationship between BI success and capabilities, such as the extent to which BI supports flexibility and risk in decision making.     

虚拟环境中三维CAD模型数据优化及重组

三维CAD在虚拟环境中有着广泛的应用,其模型数据由于具有复杂的结构且拥有较多的冗余信息而不能高效的运用到虚拟环境的构建中。基于此,针对虚拟场景渲染对数据模型的要求,给出了三维CAD模型数据优化及重组方法,该方法能去除冗余信息,优化文件结构,丰富数据内容,且能够有效地提高虚拟环境的绘制效率。     

多策略融合改进的蜣螂优化算法

针对标准蜣螂优化算法(DBO)存在的全局探索能力欠缺、收敛精度低及易陷入局部最优等不足, 提出了一种融合多策略的改进蜣螂优化算法(MSDBO). 首先, 引入社会学习策略引导推球蜣螂进行位置更新, 提高了算法全局探索能力, 避免算法陷入局部最优; 其次, 提出一种方向跟随策略, 建立起小偷蜣螂与推球蜣螂个体间的交互, 提高了寻优精度; 最后, 引入环境感知概率, 引导小偷蜣螂合理采用方向跟随策略, 兼顾了性能与时间消耗. 在12个基准测试函数上进行求解分析, 并与其他优化算法进行对比, 证明了MSDBO的寻优性能明显优于对比算法, 在压力容器设计优化问题上的结果验证了MSDBO求解实际工程约束优化问题的有效性.     

SOM人工神经网络与阻抗谱方法结合研究涂层的失效过程

    分析了干湿循环条件下有机涂层的电化学阻抗谱特征后选取了阻抗变化率参数作为一维自组织特征映射(self-organizing feature map,SOM)神经网络的训练样本,每个样本对输出层神经元都会产生一定的激发水平,根据该神经网络的特性,输出神经元激发水平的变化趋势便可以反映涂层的降解过程.结合涂层阻抗谱的变化特征,可以把干湿循环条件下涂层的失效过程分为三个阶段,即介质渗入涂层过程,介质到达金属表面诱发金属腐蚀过程和腐蚀扩展涂层剥离过程.     

网络环境下新产品开发知识团队研究综述*

在综述国内外学者有关新产品开发知识团队研究成果的基础上,试图梳理出现阶段该领域的研究热点与难点问题,为后续研究奠定一定的理论基础。分别从团队的定义和类型,团队学习与团队管理,新产品开发知识团队的概念、类型、运作与管理等方面对已有的研究文献进行了系统的综述,在此基础上提出了已有研究的局限性及对未来研究的展望。