基于粒子群优化算法的高地应力条件下硬岩本构模型的参数辨识

粒子群优化(PSO)算法是一类随机全局优化技术,具有收敛速度快、规则简单、易于实现的优点。高地应力条件下硬岩本构模型参数的确定是个尚未解决的难题。以一种适用于高地应力条件下的硬岩本构模型为研究对象,提出基于PSO算法的本构模型参数辨识方法。该方法从本构模型参数的随机值出发,以破坏区的数值计算值与实测值的误差大小作为适应度来评价参数的品质,利用PSO算法规则实现模型参数的进化,搜索出全局最优的模型参数值,从而实现硬岩本构模型参数的自适应辨识。采用该方法对加拿大的Mine-by隧洞和我国的太平驿水电站引水隧洞进行了围岩本构模型参数识别,计算结果与实测情况相吻合,表明该方法是科学可行性的,具有较高的效率和精度。     

Analysis of an energy efficient building design through data mining approach

Incorporating energy efficiency and sustainable green design features into new/existing buildings has become a top priority in recent years for building owners, designers, contractors, and facility managers. This paper intends to address why delivery of an energy efficient building is not just the result of applying one or more isolated technologies. Rather, it can best be obtained using an integrated whole building process throughout the entire project development process, which leads building designers to generate a large amount of data during energy simulations. The authors observed that even a simple energy modeling run generated pages of data with many different variables. The volumes of energy modeling data clearly overwhelm traditional data analysis methods such as spreadsheets and ad-hoc queries with so many factors to be considered. An integrated or whole building design process involves studies of the energy-related impacts and interactions of all building components, including the building location, envelope (walls, windows, doors, and roof), heating, ventilation and air conditioning (HVAC) system, lighting, controls, and equipment, which shows why it is so difficult to find the correlation between different systems. The objective of this research is to develop an energy efficient building design process using data mining technology which can help project teams discover important patterns to improve the building design. This paper utilizes the data mining technology to extract interrelationships and patterns of interest from a large dataset. Case study revealed that data mining based energy modeling help project teams discover useful patterns to improve the energy efficiency of building design during the design phase. The method developed during this research could be used to guide designers and engineers through the process of completing an early design energy analysis based on energy simulation models.     

回弹法检测混凝土抗压强度讨论

根据回弹法检测混凝土抗压强度技术规程,探讨了回弹法检测混凝土抗压强度的几个问题,重点讨论了检测数据分析中的问题。     

垃圾填埋场渗滤液回灌效果的理论研究

基于前人提出的垃圾填埋场渗滤波渗流模型，通过试验初步提出了评价回灌效果的指标和回灌有效期的概念，并分别考察了回灌水质、渗流参数及填埋深度对渗滤液中污染物浓度、微生物浓度和垃圾土中有机质溶解及降解的影响。分析结果表明，回灌能促进渗滤液中COD浓度的降低并加快垃圾土中有机质的降解；提高垃圾土的溶解速度，有利于减少垃圾土的有机质含量，同时不影响COD浓度的稳定；在相同回灌水质下，填埋越深则回灌的效果越不明显。     

基于原位监测的边坡滑动原因初步分析

目前，人们常常借助实验室对边坡滑动的机理进行模拟分析，从而得出各种各样的滑坡模型，这些模型各有千秋、难分伯仲，在适用性方面也各有所长，实践发现，用实验室模型研究成果来代表实际滑坡的代表性误差有时会相当大，甚至有时会出现很大的谬误。从根本上弄清滑坡的实际机理是一个非常重要的问题，以原形监测分析法十余年的原位监测数据为依据，初步分析了边坡滑动的外因与内因，利用数学模拟原理初步总结出了边坡滑动与诸滑坡因素间的关联关系。同时叙述了边坡原位监测的一些行之有效的方法与技术手段（包括GPS、测量机器人等）。     

GIS平台下沥青砂胶保护层劣化评价系统研究

针对扬水发电站沥青砂胶保护层劣化评价问题，在空间数据模型的构思下基于GIS平台功能，构建了整个评价系统。系统以数字照片为信息源，可以自动抽出由劣化产生的皱纹，计算其长度、面积等统计信息，对皱纹进行细化处理，计算其分形维数，以皱纹的统计信息和分形维数作为劣化度的评价指标。系统基于通用的COM技术开发，对于今后GIS在相关专业领域更深层次的应用具有一定的借鉴意义。     

Pedestrian and Bicycle Volume Data Collection Using Drone Technology

ABSTRACT

Pedestrian and bicycle volume data is one of the most fundamental types of data for active transportation planning. However, they are not yet well developed. This paper explores an innovative method that uses drone technology to collect pedestrian and bicycle volume data. It confirms the feasibility of the technology as an alternative method to collect complex movements of pedestrians and bicycles. Furthermore, this paper presents a method that converts the video footage to a spatiotemporal dataset. The dataset includes not only the pedestrian and bicycle count data, but also their behavior and characteristics. The spatiotemporal data can become a valuable resource for a variety of active transportation planning practices and research, including the collection of pedestrian and bicycle volume data in parks and recreational areas, the study of collisions between pedestrians and bicycles, and the analysis of the social path. Since it is possible to envision that the development of technologies can overcome current technical difficulties, such as battery lifespan, it is worth considering the application of drone technology to active transportation planning practice and research.     

基于信赖域算法的板梁桥横向连接刚度的参数识别

文结合有限元模型修正技术，通过ANSYS有限元程序进行桥梁结构的有限元建模，引入信赖域算法调整参数，实现了对空心板桥铰缝横向连接刚度的参数识别，数值算例表明该方法能正确、有效地进行桥梁结构的有限元模型的参数识别，并有一定的抗噪声能力。     

新建筑的呼唤--绿色和人文及健康

通过对“绿色建筑”、“人文建筑”、“健康建筑”的概念、意义及具体做法的介绍,体现新建筑的三大需求,展望建筑业的发展方向,从而加快建筑业的发展进程。     

基于GIS技术的市政信息管理系统

在地理信息管理系统的基础上,简要介绍了市政管理现状及市政信息管理系统建设的必要性,阐述了数据调查和收集的主要手段,并对市政管理信息系统的建立过程进行了论述,对市政管理、城市建设、构建和谐社会等有着重要的意义。