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lng船液舱围护系统安装平台强度衡准研究  [PDF]
江苏科技大学学报(自然科学版) , 2013,
Abstract: ?根据已建147000m3lng船液舱围护系统的安装平台资料,利用msc.patran/nastran软件对147000m3lng船典型舱围护系统安装平台建立三维模型,依据实际使用情况施加载荷和约束,进行强度分析,并结合沪东中华厂在实际建造过程的经验和建筑脚手架相关规范,最终提出一套安装平台强度衡准.建议为临界屈曲安全系数为1,临界屈服安全系数为2,支撑腿最大允许承载力安全系数为1.
Determination of Elemental Sulfur in Liquefied Gas by High Performance Liquid Chromatography
液化气中元素硫的高效液相色谱法分析

Zhu Zhirong,Qiao Xueqin,
朱志荣
,乔雪琴

色谱 , 1997,
Abstract: A method for the determination of elemental sulfur in liquefied gas has been developed in this work. First, the elemental sulfur existed in the liquefied gas was extracted by chloroform and the volatile petroleum hydrocarbons vaporized with a rate of ca. 500mL/min at low temperature in an ice water bath. The elemental sulfur dissolved in chloroform was then determined by high performance liquid chromatography. The operating conditions were: 300 x 4mm i.d. mu-Bondapak C18 column; 0.8mL/min methanol-water, 95/5 (V/V), as eluent and UV-254nm detector. The average recovery of elemental sulfur was 98.3% and the minimum detectable limit was 0.1ng/g.
系统等衡理论
张沁文
系统工程理论与实践 , 1992,
Abstract: 一、缘起 本文作者在系统工程实践和系统科学研究中,曾为许多不同质系统和不同学科的某些现象的相似性所惊叹,它们蕴含着—个共同的规律,为此,我们经过长期研究,在系统理论上提出系统等衡律来抽象和概括其规律性,文献1—3]是我们有关的研究。其它研究(如文献4—7])对我们的探索以支持和启发。本文是有关系统等衡规律和一些相关的研究结果的综述。
系统等衡理论  [PDF]
系统工程理论与实践 , 1992,
Abstract: ?<正>一、缘起本文作者在系统工程实践和系统科学研究中,曾为许多不同质系统和不同学科的某些现象的相似性所惊叹,它们蕴含着—个共同的规律,为此,我们经过长期研究,在系统理论上提出系统等衡律来抽象和概括其规律性,文献[1—3]是我们有关的研究。其它研究(如文献[4—7])对我们
INFLUENCE OF LIQUEFIED AND CCB CONTAINING LIQUEFIED WOOD ON GROWTH OF WOOD DECAY FUNGI
Hrastnik,D; Budija,F; Humar,M; Petri?,M;
Maderas. Ciencia y tecnología , 2013,
Abstract: there are high amounts of post-consumed protected waste wood removed from service every year. the residual biocides, including copper, chromium and boron from ccb (cu, cr, b) in post-consumed wood that was protected with biocides may cause environmental problems during waste management, for example during land filling. therefore, the aim of this study was to find out if cu and cr in the processed waste wood, previously treated with ccb, can be re-used as a wood preservative or in coatings made of liquefied wood. liquefaction of ccb containing waste wood could be as well the first step in the elimination process of metals. so, the optimal conditions for liquefaction of ccb (cu, cr and b) containing black poplar (populus nigra l.) wood were established and compared with liquefaction of uncontaminated black poplar wood. the reactants for liquefaction of black poplar wood sawdust were ethylene glycol (eg) and sulphuric acid. it was observed that in the last stages of the liquefaction process, the presence of cu, cr and b did not have any influence on liquefaction yield (ly), while their influence was observed in first stages of the solvolytic reaction. investigations of fungicidal properties of uncontaminated and ccb containing liquefied wood showed higher antifungal efficacy of liquefied wood without cu, cr and b than of liquefied wood that contained ccb. in the tested concentration range, the presence of cu even promoted the growth of selected wood decay fungi. one of the reasons for higher toxicity of liquefied black poplar sawdust without cu, cr and b, was its very low ph value.
INFLUENCE OF LIQUEFIED AND CCB CONTAINING LIQUEFIED WOOD ON GROWTH OF WOOD DECAY FUNGI
D Hrastnik,F Budija,M Humar,M Petri?
MADERAS : Ciencia y Tecnología , 2013,
Abstract: There are high amounts of post-consumed protected waste wood removed from service every year. The residual biocides, including copper, chromium and boron from CCB (Cu, Cr, B) in post-consumed wood that was protected with biocides may cause environmental problems during waste management, for example during land filling. Therefore, the aim of this study was to find out if Cu and Cr in the processed waste wood, previously treated with CCB, can be re-used as a wood preservative or in coatings made of liquefied wood. Liquefaction of CCB containing waste wood could be as well the first step in the elimination process of metals. So, the optimal conditions for liquefaction of CCB (Cu, Cr and B) containing black poplar (Populus nigra L.) wood were established and compared with liquefaction of uncontaminated black poplar wood. The reactants for liquefaction of black poplar wood sawdust were ethylene glycol (EG) and sulphuric acid. It was observed that in the last stages of the liquefaction process, the presence of Cu, Cr and B did not have any influence on liquefaction yield (LY), while their influence was observed in first stages of the solvolytic reaction. Investigations of fungicidal properties of uncontaminated and CCB containing liquefied wood showed higher antifungal efficacy of liquefied wood without Cu, Cr and B than of liquefied wood that contained CCB. In the tested concentration range, the presence of Cu even promoted the growth of selected wood decay fungi. One of the reasons for higher toxicity of liquefied black poplar sawdust without Cu, Cr and B, was its very low pH value.
高液限土的路用特性研究  [PDF]
吴立坚,钟发林,吴昌兴,杨世基
岩石工程学报 , 2003,
Abstract: 通过较为详尽的室内试验,揭示了高液限土的特殊的路用特性,为合理有效地利用高液限土和修订相应的技术规范做了必要的工作
高液限土路基的沉降变形规律  [PDF]
吴立坚,郑甲佳,邓捷
岩土力学 , 2013,
Abstract: 高液限土具有高天然含水率、高塑性、高孔隙比和低压实度的特点。明确高液限土路基的沉降变形规律成为其科学合理利用的关键。为此,在明确高液限土路用特性的基础上,铺筑了1条26.5m高的高液限土高填方路基试验段,并进行了长期的沉降观测。结果表明,高液限土路基填筑期间的压缩变形量很大,填筑完成后自然沉降稳定期的固结变形量较小,路面铺筑后的工后沉降量很小,约为高度的2‰;高液限土路基的沉降量与其竖向填筑厚度基本成正比。采用简化的非饱和土固结理论对高液限土路基的沉降变形进行了模拟计算,计算结果与高液限土路基的实测沉降量基本一致,说明非饱和土固结理论可用于高液限土路基的沉降计算。高液限土路基沉降变形规律的成果说明其工后沉降不会过大,为其在公路工程中的推广应用提供了技术依据。
精馏塔板相界面积的粒数衡算模型  [PDF]
宋海华,胡晖,王进
化工学报 , 2003,
Abstract: 通过对气液湍流系统中气泡的动力学行为进行分析推导出气泡破碎速率与聚并速率的表达式,在此基础上建立了描述气泡分散特性的粒数衡算模型.求解粒数衡算方程可以计算精馏塔板上气泡的粒度分布以及气液相界面积,模拟计算的结果与实验测量的数据相当一致,证明可以利用粒数衡算模型较准确地预测气液湍流系统的分散性质.
高液限土的改良技术研究  [PDF]
张国炳,余概宁
公路交通科技 , 2005,
Abstract: 高液限土主要分布于我国南方地区,是公路修筑中常见的特殊土之一,我国有关规范规定其不得直接用于路基的填筑。本文对广东某高速公路的高液限土进行了详细的室内稳定剂改良试验,得出了不同处治方法的改良效果。铺筑了采用康耐稳定剂改良的高液限土试验路,并进行了相应的观测,初步明确了康耐稳定剂改良高液限土路基的稳定效果。
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