计算机技术在建筑材料动态弹性模量测量上的应用

为保证建筑物的质量，在工程中必须对建筑材料质量进行检测。共振法无损检测是一种在混凝土等建筑材料特性检测中广泛使用的技术。介绍了一种利用计算机技术对建筑材料弹性模量进行测量的无损检测新方法，它利用成熟的计算机软硬件以及功能强大的VisualBasic软件开发系统，能方便快捷地测量建筑材料的动态弹性模量，结果稳定可靠，界面可视性强，系统简单。该技术已经成功应用在作者所开发的动弹仪产品中。     

全极化SAR影像城区建筑密度分析

针对全极化SAR影像的建筑区特性,提出了一种基于极化特征共生矩阵的城区建筑密度分析方法。首先将极化特征与共生矩阵结合,在考虑建筑区极化散射机理和建筑朝向作用的同时,兼顾了建筑区的空间排列信息,在此基础上为了增强建筑密度的局部区域特性,将共生矩阵特征进行K-means聚类,结合图像分块形成标号直方图统计矢量,进而对该直方图统计矢量进行矢量量化实现SAR影像城区的建筑密度分级。RadarSat-2全极化SAR影像城区建筑密度分析的实验表明,该方法既适用于建筑朝向复杂城区也适用于建筑排列整齐城区的密度信息提取。     

Construction-specific spatial information reasoning in Building Information Models

In recent years, there have been significant advances in modeling technology for object-oriented building products. However, the building models are still lacking of providing construction-specific spatial information required for construction planning. Consequently, construction planners visually analyze building product models and derive geometric characteristics such as bounded spaces and exterior perimeter to develop detailed construction plans. Such a process presents fragmented information flows, from building product information to construction planning, that rely on subjective decisions of construction planners. In order to overcome these drawbacks, this research proposes a geometric reasoning system that analyzes geometric information in building designs, derives the construction-specific spatial information, and uses the information to assist in construction planning. The scope of presented work includes detecting work packages formed by faces during construction, such as large work faces and bounded spaces, and using information in the work packages directly to support planning of selected indoor construction activities. The main features of the proposed system named Construction Spatial Information Reasoner (CSIR) include a set of relationship acquisition algorithms, building component relationship data structure, and interpretation of the relationship to support detailed construction activity planning. The relationship acquisition algorithms identify adjacency between building components that is stored in the relational data structure. Then, acquired adjacency relationships are transformed into a set of graphs that represent work packages. To implement the proposed approach, CSIR utilized a commercially-available Building Information Modeling (BIM) platform and the algorithms were imbedded to the BIM platform. For validation, CSIR was tested on a real commercial building. For interior ceiling grid installation activities, CSIR successfully detected existing work packages and analyzed the spatial characteristics impacting construction productivity. The major contribution of the presented research would be to enable a realistic analysis of building geometric condition that is not possible in current BIM and a seamless information flow from building product information to construction process plans. These can potentially reduce current manual and error-prone construction planning processes. Limitations and future research suggestions are also presented.     

Dynamic shading of a building envelope based on rotating polarized film system controlled by one-dimensional cellular automata in regular tessellations (triangular,square and hexagonal)

The original prototype of the cellular automaton (CA) shading system (CASS) for building facades was based on rectangular array of cells and used liquid crystal technology. This paper introduces polarized film shading system (PFSS) – an alternative approach based on opto-mechanical modules whose opacity is a function of the rotation of polarized film elements. PFSS in regular tessellations: triangular, square and hexagonal are discussed. Simulations for each type of tessellation are presented and visualized. Visual attractiveness of emergent CA patterns manifested by “particles” and “solitons” is discussed.     

面向功能进化的可重构路由器体系结构研究

由于新协议和业务的不断涌现,传统路由器的刚性和封闭性导致其无法满足上层业务发展而自由演进,因此面向功能进化的开放可重构路由器是今后发展的趋势。提出了基于积木式组装机制的可重构路由器体系结构,通过基于多矢量映射的可重构机制,利用局部矢量变化实现自身功能的不断更新、添加或删除来实现路由器功能进化,从而有力支撑上层业务的演进。     

校园网基本网络搭建及网络安全设计分析

伴随着Intemet的日益普及,网络应用的蓬勃发展,网络信息资源的安全备受关注。校园网网络中的主机可能会受到非法入侵者的攻击,网络中的敏感数据有可能泄露或被修改,保证网络系统的保密性、完整性、可用性、可控性、可审查性方面具有其重要意义。通过网络拓扑结构和网组技术对校园网网络进行搭建,通过物理、数据等方面的设计对网络安全进行完善是解决上述问题的有效措施。     

浅析计算机网络在楼字智能化建设中的应用

现代楼宇建设理念与以往明显不同,数字信息化与智能化是楼宇建设的关键,楼宇智能化也是建筑学研究的前沿。楼宇智能化将楼宇的房间的距离无限的缩小,不但使人们交流更方便,在安全的防护上也更及时科学。计算机网络在楼宇智能化建设中扮演着技术核心的作用,如何强化计算机网络技术在楼宇智能化建设中的应用是解决提高楼字智能化建设水平的关键。     

搭建式软件开发技术研究与应用

为适应软件开发对业务敏捷性和即时构造性的新要求,采用面向服务的思想,对搭建式软件开发理论和技术进行了研究和实现。与已有的开发模式相比,搭建式开发技术的优势在于它能将工作流、W ebG IS集成到一个面向服务的可视化的搭建平台中。通过电子政务系统的搭建过程表明,搭建式开发技术具有按需、即时、实用的特点,增强了企业的竞争优势。     

Multi-scale gist feature manifold for building recognition

Multi-scale gist (MS-gist) feature manifold for building recognition is presented in the paper. It is described as a two-stage model. In the first stage, we extract the multi-scale gist features that represent the structural information of the building images. Since the MS-gist features are extrinsically high dimensional and intrinsically low dimensional, in the second stage, an enhanced fuzzy local maximal marginal embedding (EFLMME) algorithm is proposed to project MS-gist feature manifold to low-dimensional subspace. EFLMME aims to preserve local intra-class geometry and maximize local interclass margin separability of MS-gist feature manifold of different classes at the same time. To evaluate the performance of our proposed model, experiments were carried out on the Sheffield buildings database, compared with the existing works: (a) the visual gist based building recognition model (VGBR) and (b) the hierarchical building recognition model (HBR). Moreover, EFLMME is evaluated on Sheffield buildings database compared with some linear dimensionality reduction methods. The results show that the proposed model is superior to other models in practice of building recognition and can handle the building recognition problem caused by rotations, variant lighting conditions and occlusions very well.     

OPC技术在智能建筑控制系统接口研究与设计

对智能建筑的控制网络结构进行研究,给出了采用OPC技术实现系统集成的方案,对OPC服务器的开发进行研究,最后以作者参与的智能大厦系统案例,利用OPC技术通过开发独立OPC服务器将各子系统纳入建筑智能化集成管理平台,达到了系统集成的目的。