检索结果-南通市图书馆

Journal of Environmental Sciences 2014年第12期26卷 2397-2405页

作者： Leilei Bai Changhui Wang liansheng he Yuansheng Pei The Key Laboratory of Water and Sediment Sciences Ministry of Education School of Environment Beijing Normal University Water Environment System Project Laboratory Chinese Research Academy of Environmental Sciences

Batch experiments were conducted to investigate the phosphorus（P） adsorption and desorption on five drinking water treatment residuals（WTRs） collected from different regions in China. The physical and chemical characteristics of the five WTRs were determined. Combined with rotated principal component analysis, multiple regression analysis was used to analyze the relationship between the inherent properties of the WTRs and their P adsorption capacities. The results showed that the maximum P adsorption capacities of the five WTRs calculated using the Langmuir isotherm ranged from 4.17 to8.20 mg/g at a p H of 7 and further increased with a decrease in p H. The statistical analysis revealed that a factor related to Al and 200 mmol/L oxalate-extractable Al（Alox） accounted for 36.5% of the variations in the P adsorption. A similar portion（28.5%） was attributed to an integrated factor related to the p H, Fe, 200 mmol/L oxalate-extractable Fe（Feox）, surface area and organic matter（OM） of the WTRs. However, factors related to other properties（Ca,P and 5 mmol/L oxalate-extractable Fe and Al） were rejected. In addition, the quantity of P desorption was limited and had a significant negative correlation with the（Feox＋ Alox） of the WTRs（p 〈 0.05）. Overall, WTRs with high contents of Alox, Feoxand OM as well as large surface areas were proposed to be the best choice for P adsorption in practical applications.

关键词： Adsorption Desorption Drinking water treatment residuals Phosphorus Principal component analysis

Characteristics of dissolved organic matter(DOM) in leachate with different landfill ages

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Journal of Environmental Sciences 2008年第4期20卷 492-498页

作者： HUO Shouliang XI Beidou YU Haichan he liansheng FAN Shilei LIU Hongliang Environment School Beijing Normal University Beijing 100875 China Chinese Research Academy of Environmental Sciences Beijing 100012 China College of Life Sciences Beijing Normal University Beijing 100875 China The College of Architecture and Civil Engineering Beijing University of Technology Beijing 100022 China

The main objective of the study was to investigate the characteristics of dissolved organic matter （DOM） in leachate with different landfill ages through the chemical, spectroscopic, and elemental analysis. Humic acid （HA）, fulvic acid （FA）, and hydrophilic （HyI） fractions were isolated and purified by the XAD-8 resin combined with the cation exchange resin method. The analytical results of fluorescence excitation-emission matrix spectroscopy （EEMs） revealed that the fluorescence peaks were protein-like fluorescence for young landfill leachate, while the fluorescence peaks for medium and old landfill leachate were humic-like and fulvic-like fluorescence, respectively. Elemental analysis showed that carbon, hydrogen, and nitrogen content decreased with landfill age, while the oxygen content increased. Moreover, the nitrogen content in these isolated fractions followed： HA 〉 HyI 〉 FA. The results of elemental analysis, FT-IR, and fluorescence EEMs also confirmed that aromatic carbons and portions of aliphatic functional groups were more abundant in leachate samples with increasing landfill age.

关键词： dissolved organic matter (DOM) fluorescence EEMs DOM fractionafion landfill leachate

Travel Notes of Russia and Poland

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International Understanding 1995年第3期 5-6页

作者： $$$$ he liansheng

ＴｒａｖｅｌＮｏｔｅｓｏｆＲｕｓｓｉａａｎｄＰｏｌａｎｄＴｒａｖｅｌＮｏｔｅｓｏｆＲｕｓｓｉａａｎｄＰｏｌａｎｄ￥ＨｅＬｉａｎｓｈｅｎｇＩｎｖｉｔｅｄｂｙｔｈｅＲｕｓｓｉａｎＳｉｎｏｌｏｇｉｓｔＡｓｓｏｃｉａｔｉｏｎ... 详细信息

ＴｒａｖｅｌＮｏｔｅｓｏｆＲｕｓｓｉａａｎｄＰｏｌａｎｄＴｒａｖｅｌＮｏｔｅｓｏｆＲｕｓｓｉａａｎｄＰｏｌａｎｄ￥ＨｅＬｉａｎｓｈｅｎｇＩｎｖｉｔｅｄｂｙｔｈｅＲｕｓｓｉａｎＳｉｎｏｌｏｇｉｓｔＡｓｓｏｃｉａｔｉｏｎ，ｔｈｅＣｈｉｎｅｓｅＡｓｓｏｃｉ...

关键词： Travel Notes of Russia and Poland

An Unforgettable Vtsit to Myanmar

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International Understanding 1995年第1期 3-5页

作者： $$$$he liansheng

ＡｎＵｎｆｏｒｇｅｔｔａｂｌｅＶｔｓｉｔｔｏＭｙａｎｍａｒＢｙＨｅＬｉａｎｓｈｅｎｇＩｎＮｏｖｅｍｂｅｒ１９９４，ａＣＡＦＩＵｄｅｌｅｇａｔｉｏｎ，ｈｅａｄｅｄｂｙＭｒ．ＷａｎＧｕｏｑｕａｎ，ＣＡＦＩＵ＇ｓＶｉｃｅＰ... 详细信息

ＡｎＵｎｆｏｒｇｅｔｔａｂｌｅＶｔｓｉｔｔｏＭｙａｎｍａｒＢｙＨｅＬｉａｎｓｈｅｎｇＩｎＮｏｖｅｍｂｅｒ１９９４，ａＣＡＦＩＵｄｅｌｅｇａｔｉｏｎ，ｈｅａｄｅｄｂｙＭｒ．ＷａｎＧｕｏｑｕａｎ，ＣＡＦＩＵ＇ｓＶｉｃｅＰｒｅｓｉｄｅｎｔａｎｄＶｉｃｅＣｈ...

关键词：外交部长缅甸代表团酒会

A Successful Visit to Germany

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International Understanding 1996年第4期 9-11页

作者： $$$$he liansheng Pu Nanyan

At the invitation of the Institute of Voca-tional Training of the Nordhein-Westfallen State(NWS),a CAFIU delegation led by *** Zhiming,Council Member of CAFIU,visited Germany from October 21 to 30,*** main purpose of the visit was to make a study of the vocational training known as a“secret weapon”in German economic development.

关键词：

NGO-an Important Force in the Course of Socio-Economic Development

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International Understanding 1997年第Z1期 15-17页

作者： $$$$by he liansheng Ruan Kehong

ＮＧＯ－ａｎ　Ｉｍｐｏｒｔａｎｔ　Ｆｏｒｃｅ　ｉｎ　ｔｈｅ　Ｃｏｕｒｓｅ　ｏｆ　Ｓｏｃｉｏ－Ｅｃｏｎｏｍｉｃ　ＤｅｖｅｌｏｐｍｅｎｔＮＧＯ－ａｎＩｍｐｏｒｔａｎｔＦｏｒｃｅｉｎｔｈｅＣｏｕｒｓｅｏｆＳｏｃｉｏ－Ｅｃｏ... 详细信息

ＮＧＯ－ａｎ　Ｉｍｐｏｒｔａｎｔ　Ｆｏｒｃｅ　ｉｎ　ｔｈｅ　Ｃｏｕｒｓｅ　ｏｆ　Ｓｏｃｉｏ－Ｅｃｏｎｏｍｉｃ　ＤｅｖｅｌｏｐｍｅｎｔＮＧＯ－ａｎＩｍｐｏｒｔａｎｔＦｏｒｃｅｉｎｔｈｅＣｏｕｒｓｅｏｆＳｏｃｉｏ－ＥｃｏｎｏｍｉｃＤｅｖｅｌｏｐｍｅｎｔ￥...

关键词： NGO-an Important Force in the Course of Socio-Economic Development

Opportunities and Challenges Faced by Realization of World Equilibrium——Speech at the″International Conference for World Equilibrium″held in Cuba

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International Understanding 2003年第1期 30-34页

作者： he liansheng Council Member and Research Fellow of CAFIU

犤Editer’snote犦:The″InternationalConferenceforWorldEquilibrium″washeldinHavanaofCubaonJanuary27-29,***,personages,expertsandscholarsfromover30countriesaswellasl***,CouncilMemberandResearchFellowofCAFIU,***:

关键词： World Equilibrium International Conference for Opportunities and Challenges Faced by Realization of World Equilibrium Speech at the held in Cuba by in of

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基坑开挖与临近既有隧道的相互影响

沈阳建筑大学学报（自然科学版） 2014年第5期30卷 826-833页

作者：何连昇张俊东北大学审计处辽宁沈阳110819 东北大学资源与土木工程学院辽宁沈阳110819

目的明确基坑开挖与临近既有隧道之间的相互影响以及基坑与隧道之间设置隔离桩的作用效果.方法采用有限元数值模拟方法,分析基坑开发过程中隧道衬砌结构和基坑支护桩变形的发展变化规律.结果基坑与隧道间距越大,基坑开挖对隧道衬砌结构... 详细信息

目的明确基坑开挖与临近既有隧道之间的相互影响以及基坑与隧道之间设置隔离桩的作用效果.方法采用有限元数值模拟方法,分析基坑开发过程中隧道衬砌结构和基坑支护桩变形的发展变化规律.结果基坑与隧道间距越大,基坑开挖对隧道衬砌结构变形的影响就越小;隧道顶底板以及侧墙的变形发展变化规律基本一致,且随着基坑与隧道间距的增加,隧道顶底板和侧墙的变形差异也逐渐减少;临近隧道一侧的基坑支护桩最大变形大于远离隧道一侧的桩体变形;在基坑与隧道之间设置隔离桩,能有效减少两者之间的相互影响,隔离桩与隧道间距从4 m增加到8m,隧道侧墙水平变形增加约47%;在隔离桩与隧道间距4 m条件下,隔离桩桩长从12 m增加到16 m,侧墙水平变形降低约50%.结论基坑开挖与临近隧道之间的相互影响较为明显,在基坑与隧道之间采用隔离桩能起到明显的隔离效果.

关键词：基坑开挖临近隧道衬砌变形桩体变形

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基坑开挖对下卧盾构隧道的影响风险分析

沈阳建筑大学学报（自然科学版） 2015年第1期31卷 62-70页

作者：何连昇何春茂张俊东北大学审计处辽宁沈阳110819 东北大学基建管理处辽宁沈阳110819 东北大学资源与土木工程学院辽宁沈阳110819

目的研究基坑开挖对邻近既有下卧盾构隧道结构产生的附加应力及不均匀变形,为施工阶段既有隧道的风险评估及控制措施提供参考.方法以哈大客专沈阳站房改造工程为背景,探讨了基坑开挖卸载对下卧盾构隧道造成的主要风险因素及盾构管片破... 详细信息

目的研究基坑开挖对邻近既有下卧盾构隧道结构产生的附加应力及不均匀变形,为施工阶段既有隧道的风险评估及控制措施提供参考.方法以哈大客专沈阳站房改造工程为背景,探讨了基坑开挖卸载对下卧盾构隧道造成的主要风险因素及盾构管片破坏的类型,针对土体力学参数的空间变异性及随机性引入蒙特卡洛模拟与三维有限元相结合的方法对衬砌结构的风险事故发生概率进行定量分析.结果基坑开挖卸载之后,隧道横向位移及管片最大压应力超出规定值的概率均为0;上抬变形量及管片最大拉应力超出规定值概率分别为39.8%、2.29%.多种因素下盾构管片总失效概率为41.18%.结论基坑开挖方法要遵循减少单次卸荷量及隧道穿越跨度的原则,并且开挖后应尽量减少基坑的放置时间.

关键词：基坑工程施工阶段风险分析蒙特卡洛失效概率

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岩土原位测试及现场监测技术

沈阳建筑大学学报（自然科学版） 2010年第4期26卷 690-694页

作者：金畅何春茂何连生东北大学基建管理处辽宁沈阳100819

目的研究现代岩土工程中原位测试技术的应用与发展.方法在新的原位测试方法中,利用便携式可变能轻型动力触探仪来测试路基以及软土地基土动阻力变化情况,采用声波测试法测得路基的剪切波速,利用改进后的压力-膨胀量曲线法,进行原位地基... 详细信息

目的研究现代岩土工程中原位测试技术的应用与发展.方法在新的原位测试方法中,利用便携式可变能轻型动力触探仪来测试路基以及软土地基土动阻力变化情况,采用声波测试法测得路基的剪切波速,利用改进后的压力-膨胀量曲线法,进行原位地基土的膨胀力试验.结果原位测试技术应广泛应用现代电子技术、传感器技术和计算机技术的最新成就,使测试自动化、数据采集、数据处理更加智能化,减少人为因素对测试结果的影响.结论对于一些新的应用还未成熟的原位测试方法,要加大科研试验投入,多进行原位测试试验数据积累,并与已有的原位测试手段对比,尽快形成相关规范.

关键词：原位测试现场监测电子技术传感器技术智能化