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Suitability of Irbid Clay as Compacted Liners for Landfill, Jordan  [PDF]
Omer S. Mughieda, Munjed Al-Sharif
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.410148
Abstract:

The goal of this study is to investigate the possibility of using the Irbid city clayey soil as compacted clay liner. The geotechnical properties and the permeability characteristics of compacted clayey soil sample obtained from the eastern part of Irbid city were determined to evaluate their suitability as compacted clay liner. Falling head permeability test, unconfined compressive strength and volumetric shrinkage test were conducted on soil samples that were compacted at about 0% and 3% wet of its optimum water content. The leakage rates expected through clay-only and composite geomembrane-clay liners were determined. It could be concluded based on the results of the geotechnical tests and leachate rate calculations that Irbid clay is appropriate to be used as compacted landfill liner material.

A study on the thermal conductivity of compacted bentonites  [PDF]
Anh-Minh Tang,Yu-Jun Cui,Trung Tinh Le
Physics , 2008, DOI: 10.1016/j.clay.2007.11.001
Abstract: Thermal conductivity of compacted bentonite is one of the most important properties in the design of high-level radioactive waste repositories where this material is proposed for use as a buffer. In the work described here, a thermal probe based on the hot wire method was used to measure the thermal conductivity of compacted bentonite specimens. The experimental results were analyzed to observe the effects of various factors (i.e. dry density, water content, hysteresis, degree of saturation and volumetric fraction of soil constituents) on the thermal conductivity. A linear correlation was proposed to predict the thermal conductivity of compacted bentonite based on experimentally observed relationship between the volumetric fraction of air and the thermal conductivity. The relevance of this correlation was finally analyzed together with others existing methods using experimental data on several compacted bentonites.
响叶杨(populusadenopoda)种子的形成及其寿命  [PDF]
吴琼美,樊汝汶
南京林业大学学报(自然科学版) , 1984, DOI: 10.3969/j.jssn.1000-2006.1984.01.014
Abstract: <正>用显微技术及软x射线摄影,定位观察响叶杨种子发育过程中的形态变化与胚胎发育的对应关系。根据观察、试验的结果,讨论了环境条件与种子寿命的关系;还测定了响叶杨种子寿命的变化规律及其影响因素,探索延长这种子寿命的方法。
响蜜Lie科的新记录
杨岚
动物学研究 , 1995,
Abstract: 1994年10月15日马中翼等人在云南省泸水县的老窝捕获到1只雄鸟,经中国科学院昆明动物研究所鉴定为黄腰响蜜lie,为我国鸟类科的新记录。标本保存在中国科学院昆明动物研究所鸟类标本室。科的特征体形较小。嘴形似雀,短而粗实,上嘴稍弯曲;尾羽12枚;翅形长而尖,仅具9枚初级飞羽;脚呈对趾型,第2、3趾向前,第1、4趾向后,似啄木鸟。
响蜜lie科的新记录  [PDF]
动物学研究 , 1995,
Abstract: 1994年10月15日马中翼等人在云南省泸水县的老窝捕获到1只雄鸟,经中国科学院昆明动物研究所鉴定为黄腰响蜜lie,为我国鸟类科的新记录。标本保存在中国科学院昆明动物研究所鸟类标本室。科的特征体形较小。嘴形似雀,短而粗实,上嘴稍弯曲;尾羽12枚;翅形长而尖,仅具9枚初级飞羽;脚呈对趾型,第2、3趾向前,第1、4趾向后,似啄木鸟。
液压减振器液压模型与气穴异响研究  [PDF]
罗天洪,金锐超,江礁,胡启国,朱孙科
重庆交通大学学报(自然科学版) , 2014, DOI: 10.3969/j.issn.1674-0696.2014.01.34
Abstract: :?为了降低液压减振器气穴异响,分析了压缩和复原过程中液压油的运动状态和气穴的生成过程,建立了气穴系数与节流孔直径之间的关系模型,以及双筒液压减振器的参数模型;通过Simulink对液压减振器压缩和复原过程的仿真分析,确定了减振器气穴异响与节流孔直径和油液运动黏度的关系。结果表明:减振器的异响可以通过增加节流阀的有效节流直径和降低油液运动黏度来减轻。
出土饱水彩绘陶器保护研究  [PDF]
宗时珍,赵晓伟,盛储彬
东南文化 , 2008,
Abstract: ????针对徐州地区大量出土的饱水彩绘陶器,出土后颜料、胶料失水收缩产生不平衡应力,导致颜料疏松、粉化、脱落的实际情况,研制一种防止饱水彩绘颜料层在干燥过程中发生风化、疏松、粉化的保护材料。我们选用耐老化、耐氧化性能较好的高分子材料’氟树脂。氟树脂的耐老化性能被文物保护领域认可,但由于氟树脂是表面自由能最低的树脂,因此氟树脂的溶解困难,粘附性差阻碍了它在文物保护领域的应用。本项研究解决的主要问题即通过试验提高氟树脂的溶解性;并在保留氟树脂较好性能的同时,与其它材料复配提高它粘附底材的能力,经过各种老化测试,研制材料达到了在不改变彩绘陶器原貌的前提下,有效的与含水率较高的陶体结合,防止饱水彩绘颜料层在风干过程中粉化、龟裂、卷曲、脱落的目的。
汽车发动机异响模糊诊断  [PDF]
闵永军,黄银娣,万茂松,黄?先
南京林业大学学报(自然科学版) , 1998, DOI: 10.3969/j.jssn.1000-2006.1998.02.005
Abstract: <正>论述了基于模糊数学理论的汽车发动机异响模糊诊断方法,提出了模糊诊断数学模型、模糊关系矩阵的建立方法及模糊推理诊断过程。据此建立的汽车故障诊断专家系统,提高了对发动机异响故障诊断的准确性和可信度。
Restoration of Oak Forests in Soils Compacted by Human and Livestock  [PDF]
Masoud Tabari,Gholam Ali Jalali,Ali Reza Ali-Arab,Mohaddeseh Ghanbari
Pakistan Journal of Biological Sciences , 2007,
Abstract: Soil in the oak forests of northern Iran is compacted by human and livestock whereas this problem is resulted to a defect in natural regeneration of tree species. This investigation aims to determine the suitable rehabilitation of these forests using seed sowing of oak in canopy densities of 25-30% (open canopy), 45-55% (semi-closed canopy) and 65-75% (relatively closed canopy). For this purpose, each canopy density specified within the plots of 1000 m2 was chosen in three replicates to plant oak acorn. The experiment was conducted as completely randomized design. The results in the first growing season indicted that seed germination rate as well as root length was greater in open canopy but no significant difference could be detected in terms of collar diameter, shoot growth, flush number and root/shoot ratio. The investigation reveals that for restoration of the soil-compacted oak stands, open canopies are better suited for seed sowing of oak.
出土汉代饱水苇编物的清理和加固  [PDF]
罗曦芸
东南文化 , 2001,
Abstract: ????本文详细叙述了对一件汉代饱水苇编物的清洗和加固,并对乙二醛加固剂的浓度和酸度控制以及加固剂组成和结构进行了讨论。
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