排序方式： 共有108条查询结果，搜索用时 15 毫秒
81.
Dario Camuffo Emanuela Pagan Adriana Bernardi Francesca Becherini 《Journal of Cultural Heritage》2004,5(4):409-416
The impact of lighting, heating and people in re-using historical buildings are discussed for the case study concerning the ceremony room (i.e. the Giant Hall) of a mediaeval palace in Padova. The Hall has substantially four major problems for conservation: (i) the impact of heating, lighting and people when the room is used; (ii) many cracks on the oak panels of the coffered ceiling; (iii) the soiling by dust and soot particles deposited on the frescoes; (iv) the stained glass windows. A microclimate study was performed to know the impact of the environmental variables, and the use of the room, on the artworks preserved inside. The study has proved the impact of the lamps (both incandescence and compact fluorescent lamps) on the ceiling, the penetration of external air in the room, the heat and the moisture released by people, the impact of sunshine through windows and the scatter diagram of the daily cycles in temperature (T) and relative humidity (RH). During winter concerts, the strips of lead which are wrapped round the edge of the cut glass pieces in stained glass windows easily drop below the dew point and form condensation, starting corrosion. A discussion concerns the allowed variability, which should not exceed risk thresholds. A safe interval can be established within the area determined by the most frequent T and RH natural cycles. In fact, both of the cycles were compatible with the artefacts, or the artefacts were already damaged to allow the exceeding dimensional changes. Attention should be paid in the variability external to this area, especially approaching or exceeding a limit equal to twice the mode of the natural variability. 相似文献
82.
目前基于Windows 98的操作平台已成为主流 ,而在教学方面 ,计算机基础内容讲授的仍以Dos操作系统为核心。或是不管什么样的专业都是千篇一律 ,一样的设置。本文针对教学中的一些实际情况 ,提出了计算机基础课程应该基于Windows操作系统 ,并提出针对专业的不同进行不同的设置 相似文献
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在 Windows98操作系统中 ,如何添加程序到开始菜单 ,复制屏幕和窗口的内容 ,打开资源管理器 ,打开显示属性窗口 ,改变桌面的墙纸和图案 相似文献
84.
无论是桌面应用系统还是服务器端,Windows server 2003都占有重要的地位,做为校园或企业内部最重要的服务器平台之一,如何加固Windows server 2003的安全是一个值得深入研究的问题. 相似文献
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Helane E. Davis 《Legal Reference Services Quarterly》2017,36(3-4):166-189
Broken windows policing came of age when one of the nation's largest and most high-profile police departments began to systematize the philosophy as part of order maintenance policing. This bibliography, comprised primarily of selected readings critical of the phenomenon, not only illustrates the depth and breadth of the criticism of specific order maintenance methods but questions much of the “proof” of their effectiveness. Book-ending the critiques are readings that articulate the founding “broken windows” theory, and cases that provide the legal framework for this particular intersection between social norms theory and law. 相似文献
87.
本文详细介绍了Java与.net开发框架的发展演变过程,从市场和技术角度分析了两者之间的异同优劣,并给出实际应用范例,预测了未来技术的发展方向。 相似文献
88.
Jian Duan Yuheng Zheng Wei Luo Wangyan Wu Tengrui Wang Yong Xie Sa Li Ju Li Yunhui Huang 《国家科学评论(英文版)》2020,7(7):1208
Graphite and lithium metal are two classic anode materials and their composite has shown promising performance for rechargeable batteries. However, it is generally accepted that Li metal wets graphite poorly, causing its spreading and infiltration difficult. Here we show that graphite can either appear superlithiophilic or lithiophobic, depending on the local redox potential. By comparing the wetting performance of highly ordered pyrolytic graphite, porous carbon paper (PCP), lithiated PCP and graphite powder, we demonstrate that the surface contaminants that pin the contact-line motion and cause contact-angle hysteresis have their own electrochemical-stability windows. The surface contaminants can be either removed or reinforced in a time-dependent manner, depending on whether the reducing agents (C6→LiC6) or the oxidizing agents (air, moisture) dominate in the ambient environment, leading to bifurcating dynamics of either superfast or superslow wetting. Our findings enable new fabrication technology for Li–graphite composite with a controllable Li-metal/graphite ratio and present great promise for the mass production of Li-based anodes for use in high-energy-density batteries. 相似文献
89.
孙永道 《邢台职业技术学院学报》2005,22(5):53-55
Windows系统存在很多安全漏洞,即使最新安装的windows也如此,及时升级Windows是每个用户必须进行的长期任务.Windows内置的自动升级功能速度很慢（实际上很多用户都关闭了它）,而且当系统出现故障急需更新时,内置的升级功能却显得“远水解不了近渴”.如何解决企业内部众多客户端系统升级问题,已经成为管理员最头痛的问题,文章给出了一种构建局域网或企业内部升级服务器的方案,实现了企业内部Windows系统升级管理的集中化和自动化. 相似文献
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本文按照终端机运行的原理,着重介绍了将低档微机进行升级的基本思路和方法.以实例安装的形式祥细介绍了升级低档微机的过程,让只能运行Windows95/98,甚至Windows3.x的计算机都运行上Windows200/XP/.Net,并且安全可靠.此方法适用于各单位局域网络的升级改造. 相似文献