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随着城市化建设的不断推进,高层建筑的发展规模和数量也越来越多。在此背景下,如何避免雷击对高层建筑行程破坏成为了高层建筑发展的重点。文章从雷击对高层建筑的危害入手,分析高层建筑电气施工的防雷电技术。 相似文献
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随着我国经济建设不断取得成就,城市现代化建设日趋完善,人民对生活水平要求日益提高,建筑行业也得到长足发展,城市对大型高层建筑的需求日益迫切,框架剪力墙结构作为大型高层建筑中使用最广泛的技术之一,为高层建筑提供有效保护,在提升建筑物安全性、稳定性上发挥着重要作用。文章针对框架剪力墙结构技术进行分析,并探讨其在房屋建筑施工中的应用。 相似文献
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随着社会的飞速进步,我国的建筑产业发展对于促进国民经济发展的重要性日益突出,人们也愈加关注建筑工程的施工质量.在一项完善的建筑工程中,大体积混凝土施工技术是建筑施工的重要组成部分.因此,文章从大体积混凝土的特征切入分析,详细介绍了技术操作要点,以期为技术员提供建设性建议,促进我国建筑行业的绿色长久发展. 相似文献
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目前,随着我国可持续发展观念的持续推进,各大建筑工程开始逐步注重绿色环保,侧重工程的绿色施工,如今绿色施工已然成为当下建筑工程的"流行词"。本篇文章将基于绿色施工概念,对绿色施工在建筑工程中的应用进行研究分析。 相似文献
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近年来,随着我国经济的飞速发展,城市中出现越来越多的高层建筑,给排水消防技术面临着新的挑战,因此必须加强研究给排水消防设计技术。文章就高层建筑给排水消防设计技术进行了研究,一方面阐述了高层建筑给排水消防设计的注意事项,另一方面阐述了高层建筑给排水消防设计的关键技术研究。 相似文献
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绿色制造是是缓解环境和能源压力,推动我国制造业转型升级的重要手段。文章分析了我国机械制造领域绿色制造技术的主要应用,提出了建立绿色制造创新平台、完善绿色供应链、建立绿色制造体系等具体的发展策略,以期对我国绿色制造产业发展发挥积极作用。 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献