Modelling temperature and humidity in storage spaces used for cultural property in Japan     

Masahide Inuzuka 《文物保护研究》2016,61(1):23-30

From rainy season to summer in Japan, the climate is humid. Especially in these seasons, it is difficult to maintain suitable conditions of temperature and relative humidity in exhibition and storage rooms in museums. Such climate conditions and problems are common to many countries in East Asia. Analysis using computer simulation can be a powerful tool because it is cheap and allows the simulation of a range of conditions without having to make changes to buildings and environments surrounding cultural objects. In this study, a storage building in which there is no air-conditioning unit was chosen as a target. The modelling of temperature and relative humidity in storage spaces was conducted using the Thermal and Airflow Network Model Simulation Program for buildings (NETS). The effect of seismic retro-fitting on the variation of temperature was predicted using NETS and the results were evaluated by comparing with the measured values. As a result, the heat transfer was successfully calculated and the modelled temperature represents the measured values reasonably well. Computing relative humidity by taking into account the effect of porous hygroscopic materials is challenging. In order to overcome this problem, the κ-ν model was adopted. We have some improvements but the study is still ongoing.  相似文献   

The Influence of Water Activity and Air Movement in Preventing Mould in Historic Materials     

Morena Ferreira  Josep Grau-Bove  Luca Mazzei  Nigel Blades  Tobit Curteis  Hector Altamirano 《文物保护研究》2018,63(5):348-350

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Air quality: a comparison of students' conceptions and attitudes across the continents     

Edward Boyes  George Myers  Keith Skamp  Martin Stanisstreet  Stephen Yeung 《Compare》2007,37(4):425-445

A closed‐form questionnaire was used to explore the ideas of school students about the composition of air, the causes and consequences of air pollution and the extent to which the students would accept various courses of action to reduce air pollution. Items for the questionnaire were derived from the results of interviews and an earlier open‐form questionnaire. More than 3000 students aged 11 to 17 years and from Australia, Hong Kong and the UK were surveyed. There was a degree of similarity between students from the different countries in their knowledge about air composition and air pollution. In terms of attitudes, however, there were differences in students' opinions about the acceptability of actions to improve air quality. Path analysis of the data appeared to show that Hong Kong students are more amenable to education as an instrument to influence their attitudes. For the other countries, the acceptability of actions for environmental protection was related to the degree of concern about air quality  相似文献   

水力旋流器内清水流场空气柱的三维数值模拟     

李慧  刘德波 《科技广场》2010,(3):17-20

本文依据计算流体动力学(CFD)的计算方法,利用Fluent软件对带有空气柱的固-液分离用水力旋流器内清水流场进行了三维数值模拟研究。文章中首次采用mixture模型对空气柱进行模拟,模拟所得的流场与实测结果作对比,证明效果良好。本文的工作对进一步研究旋流器固-液分离现象提供了一定的基础和参考。  相似文献   

体育运动中的滞空及其形成机制研究     

赵西堂  李晓琨 《广州体育学院学报》2020,(2):73-76

滞空是篮球、排球、跳远、武术等体育运动项目中常常提到的概念,也是体育运动中确实存在的一种现象,即运动员跳起后人体的头部和上体在空中停留的现象;这一现象曾因看似违背经典力学定律而备受质疑。研究通过梳理相关文献资料并结合运动生理学和运动生物力学相关知识,对滞空现象存在的本质进行了全面的分析,结果表明:滞空现象确实存在也并不违背相关运动学定律;滞空现象是运动员通过巧妙改变自身重心的位置来实现的,其形成机制包括以下三个方面:一、充分利用最高点前后人体纵向速度较小的特点;二、通过运动员肢体的相对运动改变了人体重心的相对位置;三、通过腹式逆呼吸的方法改变身体重心相对位置。  相似文献   

气温变化对黑龙江省滑雪运动开展的影响     

明君  陈秀兰  蒙猛  徐金庆 《哈尔滨体育学院学报》2008,26(6)

气温的变化,对气候依赖性极大的黑龙江省滑雪运动的开展必将产生影响。通过文献资料法对黑龙江省百逾年的气温变化进行了统计,分析了气温变暖对黑龙江省滑雪运动开展的影响,并提出了相应的对策,为黑龙江省滑雪场的合理布局提供了理论依据。  相似文献   

甘肃省高校开设气排球公共体育课程的可行性研究     

轩苏磊  麻安莉  孟凡闯 《当代体育科技》2020,(12):137-139,141

通过文献资料法、实地调查法、数理统计法、逻辑分析法等研究方法,对甘肃省高校气排球运动的开展情况和气排球引入高校体育公共课程的可行性进行分析,探索地处西北的甘肃省高校中开展气排球公共体育课程面临的问题,积极探寻解决问题的思路并提出相关建议。通过研究显示,在所有甘肃省高校中都没有开设气排球公共体育课程,可以说在甘肃省高校中气排球课程属于空白。制约气排球公共体育课程在甘肃省高校中推广开设的主要因素在于气排球运动普及宣传程度、学校领导支持因素、社会促进因素、教师本领因素、学生爱好因素等。建议加强气排球运动的价值宣传,学校领导和教师积极组织,充分利用学校场地设施等将气排球运动引入到甘肃省高校中来,进而更好地推广开设气排球公共体育课程,丰富高校学生的校园文化生活。  相似文献   

用气轨系统与Spss测定重力加速度     

赵武  王新春  祝菲霞  王昆林 《楚雄师专学报》2013,(9):35-39

使气轨处于水平方向的动态平衡状态下,通过设定系统质量,调整系统在竖直方向上所受的外力,用物理天平称量滑块质量,用智能计时系统测出滑块在水平方向的加速度。由实验原理、不确定度分析,用Spss的线性估计功能分析实验数据,得到系统质量一加速度综合量与竖直方向砝码质量的定标曲线,并验证得系统质量一加速度综合量与竖直方向的砝码质量存在线性关系,由此标定出重力加速度,并用置信概率为95％的不确定度对实验数据及其结果进行分析和评价,得到较为合理的实验结果。  相似文献   

“校企合作”模式下的空中乘务专业人才培养方案建设     

王海燕  张艺山  马俊 《新疆职业大学学报》2013,(5):76-80

高职教育的特色要求高职院校的人才培养方案构建以企业需求为出发点,而“校企合作”的人才培养模式又是高职院校优化人才培养质量的主要手段.文章以新疆职业大学空中乘务专业为例,分析了“校企合作”人才培养模式的构建过程,提出构建“校企合作”人才培养模式首先要从企业需求出发确定人才培养目标;其次是构建基于工作过程的课程体系及授课方法;最后以师资队伍和实训室建设来保障校企合作人才培养模式的实施.  相似文献   

Consolidation and chromatic reintegration of historical renders with lime-based pozzolanic products     

《文物保护研究》2013,58(5):321-332

Abstract

Historical renders are exposed to several degradation processes that can lead to a wide range of anomalies, such as scaling, detachments, and pulverization. Among the common anomalies, the loss of cohesion and of adhesion are usually identified as the most difficult to repair; these anomalies still need to be deeply studied to design compatible, durable, and sustainable conservation treatments. The restitution of render cohesion can be achieved using consolidating products. Nevertheless, repair treatments could induce aesthetic alterations, and, therefore, are usually followed by chromatic reintegration. This work aims to study the effectiveness of mineral products as consolidants for lime-based mortars and simultaneously as chromatic treatments for pigmented renders. The studied consolidating products are prepared by mixing air lime, metakaolin, water, and mineral pigments. The idea of these consolidating and coloring products rises from a traditional lime-based technique, the limewash, widely diffused in southern Europe and in the Mediterranean area. Consolidating products were applied and tested on lime-based mortar specimens with a low binder–aggregate ratio and therefore with reduced cohesion. A physico-mechanical, microstructural, and mineralogical characterization was performed on untreated and treated specimens, in order to evaluate the efficacy and durability of the treatments. Accelerated aging tests were also performed to assess consolidant durability, when subjected to aggressive conditions. Results showed that the consolidants tested are compatible, effective, and possess good durability.  相似文献