面向建筑健康监测的无人机自主巡检与裂缝识别

面向建筑健康的高时效监测需求,为提升表面病害视觉检测的自动化水平,提出了场景信息引导的无人机自主巡检任务规划方法。利用场景先验信息,针对建筑结构特征,设计了平行观测和包络观测两种观测模式,实现了狭窄空间中独栋建筑的全覆盖避障巡检,获取了毫米级分辨率的整体建筑观测影像,并对巡检质量的整体评估提出了有效的量化指标。将建筑立面划分为3 720个子区域,利用深度残差网络开展了裂缝识别分类。错分13个子区域,漏分14个子区域,裂缝识别精度高。将裂缝骨架线映射到建筑三维模型,为裂缝形态与建筑整体的一体化表达提供了数据支撑。该研究将高精度三维重建与表面病害识别相结合,为建筑健康一体化监测提供了有效的观测分析手段。     

下击暴流作用下的开洞超高层建筑风致内压及净压

通过自制发生装置在大气边界层风洞中模拟下击暴流风场,对典型开洞高层建筑进行内外压风洞试验,研究下击暴流和B类风场作用下开洞高层建筑的内压、净压特性和内压增益函数,进一步识别孔口特征参数,并将内压极值的理论计算结果与试验结果进行对比分析。结果表明,随风向角的增大,内压系数平均值和极值均先减小后增大。两侧面的净压极值最大,易发生风致破坏。开洞面由于内外压相关系数为正值,内外压作用相互抵消,其净压最小。在50°斜风向的来流作用下,内压增益幅值远大于其他风向角下的结果,且在Helmholtz共振频率处的内压能量显著增大。除70°～100°风向角外,其他风向角下内压系数极值的理论值与试验值吻合良好。     

旅游转型升级背景下传统干栏的民宿式更新 ——以龙脊景区的金竹寨为例

通过对广西龙胜各族自治县龙脊景区内民族村寨的田野调查,分析了村寨旅游开发及民居旅游转型的情况,从民宿经营策略、营建策略的角度对比分析金竹寨与景区内其他村寨干栏更新的现状,探索了旅游转型升级背景下传统干栏民宿式更新的内在机制与逻辑,明晰了传统民居因市场资本作用发生更新演变背后所隐藏的线索.     

计算机硬件课程教学问题初探

通过对普通本科院校计算机硬件课程教学中现存的问题的深入分析,针对计算机硬件课程的特点和现有的教学体制和模式,探讨性提出提高计算机硬件课程教学质量的对策.     

公民的人文素质是构建和谐东莞的基础

中国共产党提出了建立和谐社会的新目标,为实现这一目标而奋斗是全社会也是东莞目前的重大任务.在这个过程中公民良好的人文素质起着不可低估的作用,它是构建和谐东莞的坚实基础.从东莞公民人文素质的现状来看,离和谐社会的要求还有相当的距离,我们必须从实际出发,在实践中探索改变这一现状的途径和方法,以培养和提升公民的人文素质,为构建和谐东莞打下坚实的基础.     

ISO、IEC和ITU-T智慧城市定义分析

智慧城市定义是认识其知识单元和理解其本质特征、构建共识的基础.文章采用ISO 704:2009的理论框架,分析了ISO、IEC和ITU-T对智慧城市的定义,通过解构定义的智慧城市对象、利益相关方、涉及领域、智慧城市实现目标及愿景和实现路径,得出了三大国际标准化组织的智慧城市核心概念、概念关系和其认知视角,通过对三大标准化组织14位专家的问卷调查分析摸清了智慧城市核心概念的不同认知.基于系统方法和综合集成思想提出了多维度构建统一智慧城市定义的建议,为三大标准化组织智慧城市定义的标准化协同和融合提供了有效路径.     

面向节能控制的楼宇机理模型仿真研究

由于现有建筑系统能源消耗大,控制系统复杂,电力成本高,为降低电力成本,搭建建筑的机理模型进行仿真。为证明建立的模型适用于建筑系统,对模型的准确性进行仿真验证。通过对比恒定电价与时变电价的加热功率,可以看出系统通过模型预测控制能随着时间的推移响应电力价格的变化,进而很好地控制电力成本,节约能源。     

Carton nest building and trophobiont manipulation in the south-east Asian ant Dolichoderus sulcaticeps (Mayr 1870) (Hymenoptera: Formicidae)

Dolichoderus sulcaticeps, a rare canopy living dolichoderine ant, was studied in the rainforest of Malaysia. It forms large polycalyc colonies comprising partial nests on trees and climbers. The three dimensional multichambered partial nests are situated on the leaf underside. Fibrous nest material is gathered from the surface of the nesting plants and soaked with water from the plant surface. Building activity, therefore, is strictly dependent on the presence of rainfall or dew. Within the cell with plant leaf surface contact, as well as on free feeding sites, non specific coccid and membracid throphobionts, are tended. Free feeding sites are permanently protected. Mealybugs are transported between existing and new free feeding sites, as well as to and from nest pavilions, especially during their construction or destruction. Prey hunting has not been observed in D. sulcaticeps. The workers, however, recruit to offered dead prey, and scavenged. During the day they were permanently on the surface of plants around their nests and feeding sites.     

The saws of sawflies: exploring the morphology of the ovipositor in Tenthredinoidea (Insecta: Hymenoptera), with emphasis on Nematinae

The variation in ovipositor sculpture and additional features of the ovipositor apparatus in Tenthredinoidea is explored. Two outgroups and 85 species of tenthredinoids were examined, the emphasis of the taxon sampling being on Nematinae. Twenty-four morphological characters where scored and the data set was analysed under different weighting conditions. The topologies derived from analysing the character set in TNT are poorly resolved and highly unstable when analytical settings are changed. Only a few clades, the Tenthredinoidea s. str., the Diprionidae, the Cimbicidae and the Argidae + Pergidae are consistently retrieved. The functional implications of the variation in ovipositor morphology within Tenthredinidae is discussed in relation to the qualities of the host plant, e.g. the hardness and the depth of penetration in plant tissue.