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Energy-Based Prediction of Low Cycle Fatigue Life of High-Strength Structural Steel

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Journal of Iron and Steel Research International 2012年第10期19卷 47-53页

作者： LUO Yun-rong1,2, HUANG Chong-xiang1, GUO Yi2, WANG Qing-yuan1 (1. college of architecture and environment, sichuan university, chengdu 610065, sichuan, china 2. college of Mechanical Engineering, sichuan university of Science and Engineering, Zigong 643000, sichuan, china) college of architecture lind environment Sichuan University Chengdu Sichuan China college of Mechanical Engineering Sichuan University of Science and Engineering Zigong Sichuan China

Energy-based models for predicting the low-cycle fatigue life of high-strength structural steels are presented. The models are based on energy dissipation during average of cycles, cycles to crack propagation and total cycles to failure. Plastic strain energy per cycle was determined and found as an important characteristic for initiation and propagation of fatigue cracks for high-strength structural steels. Fatigue strain-life curves were generated using plastic energy dissipation per cycle (loop area) and compared with the Coffin-Manson relation. Low cycle fatigue life was found similar from both methods. The material showed Masing-type behavior. The cyclic hysterisis energy per cycle was calculated from cyclic stress-strain parameters. The fracture surfaces of the fatigue samples were characterized by scanning electron microscope and the fracture mechanisms were discussed.

关键词： low cycle fatigue high-strength steel energy-based model fatigue life

SALT-FINGERING OF POLLUTANT VERTICAL MIXING IN STATIC THERMAL-STRATIFIED WATER

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Journal of Hydrodynamics 2010年第3期22卷 430-437页

作者： CHEN Bo LUO Lin LI Jia BAI Xue LI Shao-bo State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China college of architecture and environment Sichuan University Chengdu 610065 China

Pollutant vertical mixing in stratified waters is a key factor that affects the vertical pollutant distribution in deep thermal-stratified reservoirs. This article presents an experimental study of the vertical mixing in thermal-stratified waters and an analysis of the retarded tracer jet diffusion in the thermocline layer. In the experiment, Reynolds number rapidly decreases from 104 to 10I. The stronger the stratification, the more seriously retarded the mixing will be. Some small tracer blobs may penetrate the thermocline layer into the hypolimnion layer even the main tracer cloud is retarded. According to its appearance, it can remain with salt-fingering, where the blobs are isolated away from the main cloud and mixed with the surround cold water in the hypolimnion layer. Therefore, the vertical distribution of the tracer under the thermocline layer would take larger values than expected. According to measurements, the isolated blob contents are accounted for about 5%-20% of the main tracer cloud, and are decreased with the increase of the stratification intensity. Results also show that the stronger the stratification, the smaller finger width would be. The averaged width of the incipient fingers is proportional to -0.3272 of the thermal Rayleigh number, Rat, in the turbulent jet fluid. power of the temperature gradient, AT/Az, or - 0.2823 power

关键词： thermal-stratified water vertical mixing retard double diffusion salt-finger

A Study on the Effects of the Surrounding Faults on Water Loss in the Zoige Wetland,china

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Journal of Mountain Science 2011年第4期8卷 518-524页

作者： LI Mei XU Rui HUANG Wendian SUN Hailong LUO Lin State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China. college of Life and environmental Science Guilin University of Electronic Technology Guilin 541004 China. college of Arehiteeture and environment Sichuan University Chengdu 610065 China college of live Science Sichuan University Chengdu 610065 China

The Zoige wetland is the biggest alpine wetland in the world,and an important water resource of the Yellow *** to natural and human factors,the Zoige wetland has been seriously *** studies on the Zoige wetland mainly focus on the macro features of the wetland,while the influence of the surrounding faults on the Zoige wetland degradation is rarely *** study uses terrain data to analyze the cover change and the water loss caused by the Wqie-Seji fault based on the distributed hydrological *** simulated water loss demonstrates that the Normalized Difference Vegetation Index(NDVI) is the most important factor for inducing water *** fault is also a factor that cannot be neglected,which has caused 33% of the wetland water ***,it is of importance to study the influence of the fault on the wetland degradation.

关键词： Hydrological model Fault Degradation Water loss Zoige Wetland

Analysis on the Influencing Factors of Low-carbon Economy and Its Mitigation Countermeasures in sichuan Province

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Meteorological and environmental Research 2011年第11期2卷 49-52,71页

作者： FU Miao-miao,YAO Jian college of architecture and environment,sichuan university,chengdu 610065,china

[Objective]The study aimed to analyze the influencing factors of low-carbon economy and its mitigation countermeasures in sichuan Province.[Method]Taking sichuan Province as an example,an extended STIRPAT model was established firstly,then the impacts of population,economy and technology on carbon emissions from 2000 to 2009 were analyzed econometrically by using the principal component analysis ***,some corresponding countermeasures to reduce carbon dioxide emissions were put forward.[Result]At present,population scale had the greatest influence on carbon emissions in sichuan Province,then energy consumption per industrial added value and the proportion of industrial added value to *** addition,the influence of population scale on carbon emissions was still greater than that of population structure,and technical factor also has certain explanatory power on carbon *** countermeasures,like controlling population growth,advocating low-carbon life style and consumption model,paying more attention to the strategic adjustment of industrial structure to gradually reduce the proportion of high-carbon industries,encouraging energy consumption and emissions reduction plus scientific and technological innovation in a new energy technology filed,could be adopted to reduce carbon dioxide emissions,so as to adjust to the development of low-carbon economy in sichuan Province.[Conclusion]The research could provide references for the establishment of policies for reducing carbon emissions.

关键词： sichuan Province Low-carbon economy Influencing factors Mitigation countermeasures STIRPAT model Principal component analysis china

流动注射分光光度法快速测定皮革废水中磷酸盐的研究

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维普期刊数据库

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中国皮革 2012年第23期41卷 43-46页

作者：李辉张新申俞凌云陈姝娟绵阳师范学院资源环境工程学院四川绵阳621000 四川大学建筑与环境学院四川成都610065 四川大学制革清洁技术国家工程实验室四川成都610065 四川出入境检验检疫局技术中心四川成都610041

在硝酸介质中,磷酸盐与钼酸铵形成磷钼杂多酸,在表面活性剂聚乙烯醇(PVA)存在下,磷钼杂多酸与乙基罗丹明B(ERB)生成可溶于水的络合物,据此建立了流动注射直接测定皮革废水中磷酸盐的新方法。在优化的试验条件下,当磷酸盐(PO43–-P)浓度... 详细信息

在硝酸介质中,磷酸盐与钼酸铵形成磷钼杂多酸,在表面活性剂聚乙烯醇(PVA)存在下,磷钼杂多酸与乙基罗丹明B(ERB)生成可溶于水的络合物,据此建立了流动注射直接测定皮革废水中磷酸盐的新方法。在优化的试验条件下,当磷酸盐(PO43–-P)浓度在2～200μg/L时,浓度与峰高呈良好的线性关系;检出限为0.15μg/L;重复测量结果之间的相对标准偏差为0.85%(50μg/L磷酸盐,n=15)。利用本法分析皮革废水中的磷酸盐,回收率在94.9%～101.2%之间,测定结果与国标法一致。

关键词：磷酸盐流动注射分光光度法皮革废水乙基罗丹明B

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螺型位错运动过程的计算机模拟

四川大学学报（自然科学版） 2009年第4期46卷 1077-1083页

作者：李济良曾祥国盛鹰陈华燕许书生四川大学建筑与环境学院成都610065

为能形象地理解位错的基本性质,本文以螺型位错为例,借助 OpenGL 的3D 技术,通过在 Visual C++6.0中编写程序,对螺型位错滑移时原子动态图象及其应力场分量进行了计算机模拟,并详细阐述了程序设计原理和实现方法;用此研究螺型位错的滑... 详细信息

为能形象地理解位错的基本性质,本文以螺型位错为例,借助 OpenGL 的3D 技术,通过在 Visual C++6.0中编写程序,对螺型位错滑移时原子动态图象及其应力场分量进行了计算机模拟,并详细阐述了程序设计原理和实现方法;用此研究螺型位错的滑移图像,可以直观地看到晶体中每个原子在有位错经过时的运动情况.这对研究运动的螺型位错以及混合型位错的特性都有重要意义.

关键词：螺型位错运动图像应力场 Visual C++6.O OpenGL

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因子分析法在江安河地表水水质评价中的应用

四川环境 2004年第2期23卷 75-77,83页

作者：道里刚唐亚王安四川大学建筑与环境学院四川成都610065

因子分析法是主成份分析方法的推广和深化,是把原来多个变量化为少数几个综合指标的一种统计方法。本文通过该法对江安河四川大学双流校区段水质进行了评价,结果表明,该水体受到了不同程度的有机物污染,其中非离子氨、阴离子洗涤剂、化... 详细信息

因子分析法是主成份分析方法的推广和深化,是把原来多个变量化为少数几个综合指标的一种统计方法。本文通过该法对江安河四川大学双流校区段水质进行了评价,结果表明,该水体受到了不同程度的有机物污染,其中非离子氨、阴离子洗涤剂、化学耗氧量,溶解氧所占的负荷最大。

关键词：水质评价因子分析法特征值特征向量

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畜禽养殖废水处理技术探讨

四川环境 2011年第6期30卷 139-143页

作者：梁进李袁琴杨平四川大学建筑与环境学院成都610065

介绍了畜禽养殖废水有机物和氨氮含量高、可生化性好等特点及其污染现状,从物化法和生物法两个方面综述了近年来国内外有关畜禽养殖废水处理技术的研究进展,并分析了现有处理方法的优缺点和存在的问题。在此基础上提出了现阶段厌氧(缺... 详细信息

介绍了畜禽养殖废水有机物和氨氮含量高、可生化性好等特点及其污染现状,从物化法和生物法两个方面综述了近年来国内外有关畜禽养殖废水处理技术的研究进展,并分析了现有处理方法的优缺点和存在的问题。在此基础上提出了现阶段厌氧(缺氧)-好氧组合工艺技术是处理较大规模畜禽养殖废水的主要方法,并建议畜禽养殖废水的治理应从"防"、"治"两个方面入手。

关键词：畜禽养殖废水厌氧好氧废水处理

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城市水环境建设中的资本运作探讨

四川环境 2004年第3期23卷 80-84页

作者：王焱姚建胡蓉四川大学建筑与环境学院四川成都610065 四川省环境工程评估中心四川成都610015

城市水环境的治理和改善需要高额资金,建设中的资本运作尤为重要。本文在论述了传统水环境建设投资模式及其缺陷的基础上提出了城市水环境建设中资本运作的基本思路,从成立专业投资公司、拓宽融资渠道和确立收益回报形式等几个主要环节... 详细信息

城市水环境的治理和改善需要高额资金,建设中的资本运作尤为重要。本文在论述了传统水环境建设投资模式及其缺陷的基础上提出了城市水环境建设中资本运作的基本思路,从成立专业投资公司、拓宽融资渠道和确立收益回报形式等几个主要环节详细阐述了资本运作基本模式的组成和功能,介绍了新的融资渠道和收益形式,并对新的资本运作模式应注意的问题进行了深入的分析。

关键词：城市水环境环境政策资本运作融资渠道