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1.
In order to fulfill the current WEEE directives, the traditional approach to manage thin film transistor-liquid crystal display (TFT-LCD) waste glass is inadequate. It is a serious opportunity to achieve resource conservation, reduction, stabilization and safety of management of TFT-LCD in the near future. To assist in achieving these goals, this study investigated the sintering characteristics and material properties of TFT-LCD waste glass, which can be pulverized and ground and subsequently blended with clay, at various substitution levels (0–40%) and finally fired from 800 °C to 1000 °C to make eco-brick. The brick thus produced was analyzed to determine variations in weight losses on ignition, 24-h absorption, bulk density, shrinkage, compressive strength and microstructure changes. The results for specific gravity, water adsorption, and compressive strength revealed that bricks made from mixtures containing TFT-LCD waste glass met the general requirements for bricks. The advantages of less water absorption, less weight loss on ignition, and a gain in compressive strength in the clay-TFT-LCD waste glass bricks should encourage the use of TFT-LCD waste glass as a brick additive. 相似文献
2.
显示屏(监视器和电视机)经历了从阴极射线管到平板显示器技术的快速变化。截至目前为止,只有少量的平板显示器已记录在废物收集点。平板显示器的数量越来越多,在未来需要足够的用于回收的基础设施。本文旨在通过液晶显示屏幕的回收对经济影响的案例研究来提供数量、成分、回收利用技术和经验的基本数据。对于组件和材料也适用于其他类型的电子产品,如黑色金属和有色金属,印刷电路板或电缆,回收途径和技术是众所周知的和可用的。目前,液晶显示器(LCD)在欧洲不回收。处置时,例如,通过焚烧,有价值的材料,其成分是不再可用。例如:铟具有重要战略意义的应用,如,太阳能光伏作为一种稀缺资源。液晶显示器在欧洲具有回收基础设施,因此是有用的。 相似文献
3.
Numerous studies have focussed on the relationship between female choice and the multiple exaggerated sexual traits of males.
However, little is known about the ability of males to actively enhance specific components of their display in response to
the loss of one component. We investigated the capacity of male satin bowerbirds (Ptilonorhynchus violaceus) to respond to the loss of one of their sexual signals by performing an experiment in which we removed decorations at their
bowers. We found that males compensated for decoration loss by increasing bower construction behaviour and decreasing their
latency to bower painting. These results are novel because they suggest that males can assess the quality of their own display
and make decisions about how to augment their displays. We discuss these results in the context of previous studies of mate
choice in satin bowerbirds, as both of the supplementary behaviours we observed are known correlates of male mating success. 相似文献
4.
Some emerging technologies are expected to be pivotal for solving many of the environmental challenges faced today, especially those related to energy. However, many of these technologies may incur significant environmental impacts over their life cycle, while having environmental benefits during their use. This paper presents results of a Life Cycle Assessment (LCA) of a proposed type of nanophotovoltaic, quantum dot photovoltaic (QDPV) module. The LCA is confined to the stages of raw materials acquisition, manufacturing, and use. The impacts of QDPV are compared with other types of PV modules and energy sources - both renewable and nonrenewable. To provide a comprehensive comparative assessment, QDPV modules were compared with mature as well as emerging PV types for which data are available. Comparative assessment with other types of energy sources includes coal, oil, lignite, natural gas, diesel, nuclear, wind, and hydropower.QDPV modules may have the potential to overcome two current barriers of solar technology: low efficiencies and high manufacturing costs. If higher efficiencies are realized, QDPV modules could pave the way to large scale implementation of solar energy, helping nations move toward greater energy independence. On the other hand, candidate materials as quantum dots for solar cell applications are mostly compound semiconductors such as cadmium selenide, cadmium telluride, and lead sulfide which may be toxic and for which renewable options are limited. Toxic effects of these materials may be exacerbated by their nanoscale features.The LCA was carried out using the software SimaPro, and the Ecoinvent Life Cycle Inventory (LCI) database supplemented with available literature and patent information. Our results indicate that while QDPV modules have shorter Energy PayBack Time (EPBT), lower Global Warming Potential (GWP), SOx and NOx emissions than other types of PV modules, they have higher heavy metal emissions, underscoring the need for investigation of emerging technologies, especially nano-based ones, from a life cycle perspective. QDPV modules are better in all impact categories assessed than carbon-based energy sources but they have longer EPBT than wind and hydropower and higher GWP. 相似文献
5.
本文主要探讨肘部支撑在视频显示终端作业过程中对背部和右手表面肌电的影响。采用Meta分析方法对以往研究资料进行筛检及汇总分析。结果发现:左右侧斜方肌的最大自主收缩百分比(MVC%)分别下降了0.83%(95%CI-1.00%--0.66%)和0.61%(95%CI-0.78%~-0.43%),对于右手食指伸指肌而言,其影响并不具有显著性。可以认为肘部支撑是一种比较简单而且有效的预防措施。 相似文献
6.
7.
大空间火灾烟气流动的动态显示研究 总被引:4,自引:0,他引:4
讨论了火灾烟气流动过程的计算机动态模拟方法。利用Delphi可视化编程工具,建立了一个融区域模拟计算和计算机动态显示于一体的火灾发展的模拟软件,并以中国科技大学的大空间建筑火灾实验厅为对象,对典型火灾羽流及烟气层的发展过程进行了动态显示。 相似文献
8.
Summary. Workers of the amblyoponine species Mystrium rogeri employ trail communication during recruitment to food sources and new nest sites. The trail pheromone originates from a hitherto
unknown sternal gland located in the 7th abdominal sternite. The recruiting ant deposits the gland secretions by a special
gaster-dragging behavior. The recruitment behavior can be complemented by a rapid vertical body shaking performed by some
recruiting ants inside the nest. M. rogeri workers possess a large pygidial gland, the secretion of which elicits a repellent response in other ant species.
Received 25 May 1998; accepted 15 June 1998. 相似文献
9.
10.
不同运行规则下区间列车运行安全性及效率研究 总被引:1,自引:0,他引:1
列车区间运行安全是列车运行安全中极为重要的部分,而列车在区间运行的安全性及效率与运行规则密切相关。将闭塞分区及与其配套的通过色灯信号机结合在一起,建立区间模型,给出列车在区间运行的安全性要求,定义列车在区间连续追踪运行的安全度,介绍列车在区间运行的全部3种运行规则及相应的区间阻塞状态。在此基础上,定量计算3种规则的安全度。基于安全性和效率,对列车运行规则进行深入研究,结果表明,3种规则效率相当,规则1安全性最优。 相似文献