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Research in Cold and Arid Regions 2009年第4期1卷 322-328页

作者： JiChun Wu,Yu Sheng,QingBai Wu,Jing Li,XiuMin Zhang State Key Laboratory of frozen soil {2.,Cold and Arid Regions Environmental {2. Research Institute,Chinese Academy of Sciences,lanzhou,Gansu 730000,china. Chinese Acad Sci Cold & Arid Reg Environm Engn Res Inst State Key Lab Frozen Soil Engn Lanzhou 730000 Gansu Peoples R China

Large amounts of ground ice are born with permafrost on the Qinghai-Tibet *** of permafrost resulted from the climate warming will inevitably lead to melting of ground *** water released from the melting ground ice enters hydrologic cycles at various levels,and changes regional hydrologic regimes to various *** to difficulties in monitoring the perma-frost-degradation-release-water process,direct and reliable evidence is *** accumulative effect of releasing water,however,is remarkable in the macro-scale hydrologic *** the basis of the monitoring results of water-levels changes in some lakes on the Qinghai-Tibet Plateau,and combined with the previous results of the hydrologic changing trends at the regional scale,the authors preliminarily discussed the possibilities of the degrading permafrost on the Qinghai-Tibet Plateau as a potential water source during climate warming.

关键词： climate warming thawing permafrost melting ground ice potential water source

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论青藏铁路修筑中的冻土环境保护问题

水文地质工程地质 2002年第4期29卷 14-16,20页

作者：吴青柏施斌南京大学地球科学系地球环境计算工程研究所

本文通过研究已建青藏公路修筑过程中寒区冻土环境和生态环境的破坏特征 ,分析总结了寒区环境破坏对公路工程的影响。青藏公路工程修建活动极大地改变了冻土环境 ,使得多年冻土退化 ,上限加深 ,诱发了一系列冻胀、融沉、热融滑塌等冻融... 详细信息

本文通过研究已建青藏公路修筑过程中寒区冻土环境和生态环境的破坏特征 ,分析总结了寒区环境破坏对公路工程的影响。青藏公路工程修建活动极大地改变了冻土环境 ,使得多年冻土退化 ,上限加深 ,诱发了一系列冻胀、融沉、热融滑塌等冻融灾害 ,使得生态环境原本就很脆弱的寒区环境更加恶化 ,如植被退化、荒漠化等 ,同时 ,冻土环境的破坏也使得工程环境恶化 ,直接影响青藏公路正常交通运输。因此 ,在即将进行的青藏铁路修筑工程中 ,必须深入研究其对冻土环境的影响 ,对冻土环境问题和环境保护应予以足够的重视。

关键词：青藏铁路冻土环境冻融灾害荒漠化冻胀融沉植被退化

Thermal and Mechanical Analysis of Ground Freezing Method Applied to Subway Tunnel

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Thermal and Mechanical Analysis of Ground Freezing Method Ap...

第八届国际冻土工程会议

作者： Shuangyang Li Shujuan Zhang Mingyi Zhang Erxiang Zhao (State Key Laboratory of frozen soil {2. Cold and Arid Regions Environmental and {2. Research Institute Chinese Academy of Sciences lanzhou Gansu 730000 china)

＜正＞Although controlled ground freezing for construction and mining application has been in use for more than several decades,the literatures concerning about this aspect have mainly concentrated on engineering technique and indoor test instead of theoretical calculations and analyses up to *** order to provide theoretical reference for engineering practice,in this paper,a subway tunnel in Guangzhou,constructed by employing ground freezing method as an auxiliary engineering method,is taken as an example to analyze thermal and mechanical states of soils and linings during tunnel *** first,based on the governing differential equations of the transient temperature field with phase change and heat of hydration of cement,the temperature fields at every excavation stage are computed and analyzed by using finite element ***, according to the distribution feature of the temperature field at every excavation stage and corresponding mechanical parameters decided by this temperature field,the stresses and settlements of soils during corresponding excavation stage are also analyzed through using creep constitutive model for frozen soil and elastoplastic constitutive model for unfrozen *** last,the safety of frozen earth wall is evaluated by applying long-term strength equation of frozen *** results show that,if ground freezing method is used to constructed subway tunnel,the surface settlements will be controlled effectively.

关键词： ground freezing method tunnel temperature field stress settlement

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科尔沁沙地人工植被对土壤水分异质性的影响

土壤学报 2002年第1期39卷 113-119页

作者：赵文智中国科学院寒区旱区环境工程研究所冻土工程国家重点实验室兰州730000

选择植被状况基本相同而坡位不同的样地 ,坡向和坡度基本相同而植被类型不同的沙丘背风坡 (东南坡 )样线及沙丘上部样地 ,在生长期调查其土壤水分状况 ,探讨植被类型、坡位对沙地土壤水分状况及水分格局的影响。结果表明 :沙丘背风坡 (... 详细信息

选择植被状况基本相同而坡位不同的样地 ,坡向和坡度基本相同而植被类型不同的沙丘背风坡 (东南坡 )样线及沙丘上部样地 ,在生长期调查其土壤水分状况 ,探讨植被类型、坡位对沙地土壤水分状况及水分格局的影响。结果表明 :沙丘背风坡 (东南坡 )人工植被土壤水分状况按差巴嘎蒿、杨树、樟子松的次序依次变差。以 0 5m为间隔取样分析表明沿沙丘下部到沙丘上部土壤水分状况有下降趋势。在水平格局上 ,樟子松林地土壤水分状况在0～ 8m ,杨树林地在 0～ 4m ,流动沙地在 0～ 9m的尺度上近似同质 ,随着空间距离的增加 ,异质性加强 ;差巴嘎蒿土壤水分状况在 0～ 4m的范围内异质性较高 ,4m以上近似同质。在垂直格局上 ,流沙在 0～ 60cm ,樟子松在 0～ 80cm ,差巴嘎蒿在 0～ 1 2.0cm的尺度上异质性很强 ,大于该尺度近似同质 ,而杨树林地在 0～ 30 0cm的范围内均有较强的异质性。无论水平格局或垂直格局。

关键词：科尔沁沙地人工植被土壤水分状况土壤水分异质性

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肃南县山地草原畜牧业的发展模式

生态经济 2001年第11期17卷 57-59页

作者：周立华樊胜岳张明军中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室兰州730000

本文以祁连山区的肃南县为实验基地 ,通过对山地草原牧区生态保护和经济发展之间现存问题的分析 ,提出了以草原管理、牲畜繁育和产业发展为主要内容的山地草原畜牧业的生态经济发展模式。它将山地草原的生态保护与农户的经济增长兼容起... 详细信息

本文以祁连山区的肃南县为实验基地 ,通过对山地草原牧区生态保护和经济发展之间现存问题的分析 ,提出了以草原管理、牲畜繁育和产业发展为主要内容的山地草原畜牧业的生态经济发展模式。它将山地草原的生态保护与农户的经济增长兼容起来 ,从而成为山地草原畜牧业的一个可持续发展模式。

关键词：肃南县山地草原畜牧业发展模式可持续发展生态保护农户经济增长

Spin-glass like behaviors in La_(1-x)Tb_xMnO_3 perovskite

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Science china(Physics,Mechanics & Astronomy) 2009年第12期52卷 1893-1897页

作者： ZHANG YingTang1,2.3,WANG ChunChang2.4,LIU WeiBin1,WANG Zhong3,LU HuiBin2.& CHEN ZiYu1 1 Department of Physics,Beijing University of Aeronautics and Astronautics,Beijing 100191 2.Institute of Physics & Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100190 3 School of Material Science & engineering,Shaanxi University of Technology,Hanzhong 72.003 4 Institute of Superconducting and Electronic Materials,Wollongong University,Northfield Ave,Gwynneville,NSW 2.2.,Australia Department of Physics Beijing University of Aeronautics and Astronautics Beijing China Institute of Physics & Center for Condensed Matter Physics Chinese Academy of Sciences Beijing China School of Material Science & engineering Shaanxi University of Technology Hanzhong China Institute of Superconducting and Electronic Materials Wollongong University Gwynneville Australia

A series of samples of La1-xTbxMnO3 (0≤x≤0.15) are prepared. The static and dynamic magnetizations of La1-xTbxMnO3 have been investigated. The results indicate that the spins with the short-range order are frozen into random direction at low enough temperatures which leads to the samples exhibiting the spin-glass like behavior. It is considered that the spin-glass like behavior originates from the competition between ferromagnetic double exchange among Mn3+ and Mn2. and antiferromagnetic superex-change among Mn3+ and Mn3+,as well as Tb3+ and Tb3+.

关键词： La1-xTbxMnO3 spin-glass-like behavior short-range order

Current developments of research on permafrost engineering and cold region environment:a report of the 8^(th) International Symposium on Permafrost engineering

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Research in Cold and Arid Regions 2010年第2期2卷 93-103页

作者： FuJun Niu 1,2.GuoYu Li 1,ShuPing Zhao 1,ShuJuan Zhang 1,YongGuo Zhao 2.HuiJun Jin 1 1.State Key Laboratory of frozen soil {2.,Cold and Arid Regions Environmental and {2. Research Institute,Chinese Academy of Sciences,lanzhou,Gansu Province 730000,china 2.Key Laboratory of Highway Construction and Maintenance Technology for Permafrost Regions of Ministry of Communications,CCCC First Highway Consultants Co.,Ltd.,Xi’an,Shaanxi Province 710068,china Chinese Acad Sci Cold & Arid Reg Environm & Engn Res Inst State Key Lab Frozen Soil Engn Lanzhou 730000 Gansu Peoples R China CCCC First Highway Consultants Co Ltd Permafrost Reg Minist Commun Key Lab Highway Construct & Maintenance Technol Xian 710068 Shaanxi Peoples R China

The Eighth International Symposium on Permafrost engineering was held in Xi’an,china,October *** major topics discussed in the symposium included:permafrost engineering (involving design,construction and evaluation);mitigation of frost hazards in the regions affected by seasonally frozen ground;properties of frozen soils,model development and their applications;frost hazards and periglacial environments in mountain and plateau regions;climatic,environmental and cryospheric changes;and permafrost hydrology,cold regions water resources and land *** papers submitted to the symposium and lectures during the meeting represented some new developments of research on cold region engineering and *** we summarized the works of the symposium in topics including:Permafrost engineering;General geocryology;Properties of frozen soils:model development and their applications;And climatic,environmental and cryospheric *** the symposium,the attendees pointed out that future studies should pay more attention to theoretical study and engineering mechanism study,and also on interaction between climate change and cold region environments and their engineering affects.

关键词： the 8th symposium permafrost engineering cold region environment summarizing

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青藏铁路格拉段防雷接地技术的研究

铁道学报 2003年第3期25卷 45-48页

作者：张丽丽吴广宁沈洪王建文李晋西南交通大学电气工程学院四川成都610031 铁道第一勘察设计院电化处甘肃兰州730070

青藏铁路格拉段是世界上海拔最高的高原铁路,雷击过电压保护面临高原和冻土两大难题。针对雷击过电压的影响因素,在分析格拉段雷暴活动情况及沿线高原冻土地区地质特点的基础上,提出铁路沿线防雷接地工程的实施办法。结合高原冻土地区... 详细信息

青藏铁路格拉段是世界上海拔最高的高原铁路,雷击过电压保护面临高原和冻土两大难题。针对雷击过电压的影响因素,在分析格拉段雷暴活动情况及沿线高原冻土地区地质特点的基础上,提出铁路沿线防雷接地工程的实施办法。结合高原冻土地区的特点,探讨了格拉段防雷接地技术的新思路和急需解决的问题。

关键词：雷击过电压保护防雷接地雷暴活动冻土冻土地带

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土地沙质荒漠化过程的土壤分形特征

土壤学报 2002年第6期39卷 877-881页

作者：赵文智刘志民程国栋中国科学院寒区旱区环境与工程研究所

土壤特性往往是沙质荒漠化的一个指征，也是不同形式的土地沙质荒漠化导致的生态系统功能改变的一个非常重要的测度。粒度组成是土壤结构和生产力的重要方面。

关键词：土壤分形特征土地沙质荒漠化分形维数粒径重量分布

Application of Luxol Fast Blue staining in locating the corticospinal tract in adult rats

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Neural Regeneration Research 2006年第7期1卷 642-644页

作者： Su Liu1, Guangyu Shen1, Guangming Lü2. Xiaosong Gu3 1Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong 2.6001, Jiangsu Province, china 2.epartment of Human Anatomy, Nantong University, Nantong 2.6001, Jiangsu Province, china 3Jiangsu Key Laboratory of Nerve Regeneration, Nantong 2.6001, Jiangsu Province, china Department of Rehabilitation Medicine Hospital of Nantong University Nantong 226001 Jiangsu Province China Department of Human Anatomy Nantong University Nantong 226001 Jiangsu Province China Jiangsu Key Laboratory of Nerve Regeneration Nantong 226001 Jiangsu Province China

BACKGROUND: There are many methods for myelin staining, mordant, or oil-soluble dye or the special reaction of osmic acid with lipoid is used according to different principles. The commonly used methods are classic Well staining, classic lithium carbonate-haematine staining, fast green staining, silver staining, etc. Luxol Fast Blue can brightly stain myelin sheath, and has certain specificity. The background can be very clean if there is proper differentiation, whereas Luxol Fast Blue is cheap and convenient to operate, thus it is an ideal staining reagent for routine myelin sheath. OBJECTIVE: To show the corticospinal tract of normal adult rats with Luxol Fast Blue staining method. DESIGN: A repetitive measurement design. SETTINGS: Institute of Nuerobiology, Nantong University; Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University. MATERIALS: Six healthy adult male SD rats of clean degree, weighing averagely 300 g, were provided by the experimental animal center of Nantong University. 1 g/L Luxol Fast Blue solution was provided by Sigma Company; Leica CM1900 cryostat microtome by Leica Company; Leica DMR microscope by Leica Company. METHODS: The experiment was carried out in the Staff Room of Human Anatomy, Nantong University in May 2.05. The rats were given intraperitoneal injection of combined anesthetic (2.mL/kg), then the chest was open for perfusing saline and phosphate buffer containing formamint via heart. Brain and spinal cord were removed after 1 hour then fixed, then changed to phosphate buffer (pH 7.4) containing 300 g/L saccharu at 4 ℃, and stayed overnight, tissue blocks at pyramid, decussation of pyramid and cervical, thoracic, lumbar and sacral segments of spinal cord were removed to prepare continuous horizontal frozen sections (30 μm) after sedimentation, the sections were dried at room temperature. The corticospinal tract of normal adult rats were shown with Luxol Fast Blue staining method, and observed under Leica DMR

关键词： Application of Luxol Fast Blue staining in locating the corticospinal tract in adult rats