建筑工程中常用塑料管材的性能对比与应用研究

介绍了目前建筑工程中塑料管材的发展和应用现状,对建筑工程中常用的几种塑料管材的性能特点及安装特点进行了对比分析,对建筑工程选用塑料管材的一般原则进行了总结,并对塑料管材市场的未来发展方向及重点进行了探讨。     

化工技能竞赛引领化工专业建设的探讨

化工技能大赛是引领化工专业建设的风向标,对培养高技能化工人才起着较好的促进作用。从实训基地和实训课程的建设、课程教学改革、师资队伍建设、学生学习动力等方面阐述了技能大赛对化工专业建设的指导意义。     

Modeling dynamic construction work template from existing scheduling records via sequential machine learning

Today, construction planning and scheduling is almost always performed manually, by experienced practitioners. The knowledge of those individuals is materialized, maintained, and propagated through master schedules and look-ahead plans. While historical project schedules are available, manually mining their embedded knowledge to create generic work templates for future projects or revising look-ahead schedules is very difficult, time-consuming and error-prone. The rigid work templates from prior research are also not scalable to cover the inter and intra-class variability in historical schedule activities. This paper aims at fulfilling these needs via a new method to automatically learn construction knowledge from historical project planning and scheduling records and digitize such knowledge in a flexible and generalizable data schema. Specifically, we present Dynamic Process Templates (DPTs) based on a novel vector representation for construction activities where the sequencing knowledge is modeled with generative Long Short-Term Memory Recurrent Neural Networks (LSTM-RNNs). Our machine learning models are exhaustively tested and validated on a diverse dataset of 32 schedules obtained from real-world projects. The experimental results show our method is capable of learning planning and sequencing knowledge at high accuracy across different projects. The benefits for automated project planning and scheduling, schedule quality control, and automated generation of project look-aheads are discussed in detail.     

Validity of facial features’ geometric measurements for real-time assessment of mental fatigue in construction equipment operators

Operating construction equipment for extended periods of time may lead to mental fatigue and, as a result, an increased risk of human error-related accidents and jeopardized health problems for the operators. Therefore, to limit the risk of accidents and protect operators' wellbeing, their mental fatigue must be monitored reliably and in real time. Recently, many invasive technologies have been employed to alleviate this problem, but they entail the wearing of physical sensors, which may instigate irritation and discomfort. This study proposes a non-invasive mental fatigue monitoring method using geometric measurements of their facial features that does not require the operators to wear sensors on their body. The study further validates the proposed method by comparing it with wearable electroencephalography (EEG) technology to establish its ecological validity for construction equipment operators. To serve the purpose, a one-hour excavator operation by sixteen construction equipment operators was conducted on a construction site. Ground truth, brain activity using wearable EEG, and geometric measurements of facial features were extracted and analyzed at the baseline and every 20 min for one hour. A considerable temporal variation was found in the reported metrics (eye aspect ratio, eye distance, mouth aspect ratio, face area, and head motion) and were significantly correlated with ground truth and EEG metric. Furthermore, the brain visualization pattern obtained from EEG was also associated with the variations in the facial features. The findings of the study reveal that construction equipment operators’ mental fatigue can be monitored non-invasively using geometrical measurements of facial features.     

体育信息资源整合及其网络共享服务模式的构建

学校的体育教学以及科学研究都与体育资源的整合有着密切的关系，尤其对我国体育事业的发展起着一定的推动作用。科学技术的发展也推动着互联网信息平台的建设，体育事业的发展也跟随这样的信息建设而实行有效的整合与应用。本文主要结合当今互联网中体育资源信息整合的基本情况，来具体阐述体育信息资源网络构建的过程和内容。     

浅析高校图书馆智慧服务

为教学、科研和师生服务是各高校图书馆永远的主题。信息时代的融合与创新促使高校图书馆正在由传统服务模式转向智慧服务模式。本文就如何在融合与创新中提升图书馆的智慧服务能力和水平,结合个人的认识和体会进行了分析和探讨,并提出了自己的看法和观点。     

16.9-26 8PR农业无内胎轮胎的产品设计

介绍了16.9-26 8PR农业无内胎轮胎的产品设计。其结构为轮胎外直径1424 mm,轮胎断面宽414 mm,行驶面宽度398 mm,胎圈着合直径663 mm,花纹深度80 mm,花纹块占整个行驶面面积的17.45%。前支撑角为13°,后支撑角为16°。施工设计上胎面采用了三方五块压出,胎体帘布采用4层1260D/2V1线及2层1260D/2V2线,机鼓采用直径为835 mm的半芯轮式,硫化采用胶囊式硫化罐硫化。成品轮胎室内试验结果表明,轮胎充气后外缘尺寸、物理性能、断面尺寸均达到设计及相关标准要求。     

国外生土建筑发展对我国的启示与借鉴

生土建筑形式多样,不仅是中国传 统建筑重要的组成部分,在世界范围内也有 广泛分布。在全球能源危机背景下,生土建 筑材料的生态性能又一次受到世人瞩目。我 国研究生土建筑时间较早,但相较于发达国 家,在研究探索与经验累积等方面还存在一 定差距。本文从研究机构、教育模式、规范 标准三个不同层面对国内外生土建筑研究进 行分析判断,寻找出目前国内外生土建筑发 展的现状和需要改进之处,总结国外先进研 究经验,以高校教育作为理论支撑、规范标 准作为实践场地、研究机构作为理论与实践 结合的统筹研究单位,使三方面形成集“产 学研”为一体的完整链条,为我国生土建筑 的进一步发展提供依据。     

我国平板网架结构的发展现状

本文总结论述了我国迅速发展的平板网架结构,并详细对结构的形式、连接方法、计算分析、施工与质裣、以及屋面材料、支座形式和防火、防锈涂料等方面发展状况进行了评述,最后还列示了有代表性的几十个典型工程实例。     

寻求舒适性与可持续发展的平衡点——一座德国幼儿园的改造给我们的思考

保持建筑的舒适度和建筑的可持续发展是一对矛盾.主要对德国的一座幼儿园改造进行调查和分析,希望能通过对它的介绍对我国建筑的发展有启示作用.