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Slope deformation partitioning and monitoring points optimization based on cluster analysis

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Journal of Mountain Science 2023年第8期20卷 2405-2421页

作者： LI Yuan-zheng shen jun-hui ZHANG Wei-xin ZHANG Kai-qiang PENG Zhang-hai HUANG Meng State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China Inner Mongolia First Machinery Group Co. LtdBaotou 014030China School of Civil Engineering Chongqing UniversityChongqing 400045China China Communications Construction Fourth Harbor Engineering Institute Co. LtdGuangzhou 510230China

The scientific and fair positioning of monitoring locations for surface displacement on slopes is a prerequisite for early warning and ***,there is no specific provision on how to effectively determine the number and location of monitoring points according to the actual deformation characteristics of the *** are still some defects in the layout of monitoring *** this end,based on displacement data series and spatial location information of surface displacement monitoring points,by combining displacement series correlation and spatial distance influence factors,a spatial deformation correlation calculation model of slope based on clustering analysis was proposed to calculate the correlation between different monitoring points,based on which the deformation area of the slope was *** redundant monitoring points in each partition were eliminated based on the partition's outcome,and the overall optimal arrangement of slope monitoring points was then *** method scientifically addresses the issues of slope deformation zoning and data gathering *** not only eliminates human subjectivity from slope deformation zoning but also increases the efficiency and accuracy of slope *** order to verify the effectiveness of the method,a sand-mudstone interbedded CounterTilt excavation slope in the Chongqing city of China was used as the research ***-four monitoring points deployed on this slope were monitored for surface displacement for 13 *** spatial location of the monitoring points was *** results show that the proposed method of slope deformation zoning and the optimized placement of monitoring points are feasible.

关键词： Excavation slope Surface displacement monitoring Spatial deformation analysis Clustering analysis Slope deformation partitioning Monitoring point optimization

Mechanism of colluvial landslide induction by rainfall and slope construction:A case study

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Journal of Mountain Science 2021年第4期18卷 1013-1033页

作者： ZHOU Zhou shen jun-hui LI Ying DUAN Wei-feng YANG Ri-chang SHU jun-cheng LI He-wei TAO sheng-yu ZHENG sheng-zhe State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China College of Environment-geology and Civil Engineering Chengdu-University of TechnologyChengdu 610059China Power China Huadong Engineering Corporation Limited Hangzhou 310000China

The landslide hazards occurring in the complex geological genesis accumulation body are usually controlled by the coupling action of many internal and external ***,this paper takes the dam-front Danbo accumulation body landslide of Yangfanggou hydropower station on the Yalong River as the geological prototype,and discusses the process and mechanism of slope stability degradation under the combined action of rainfall and slope *** on the detailed understanding of the basic characteristics of the accumulation body,the development characteristics of the landslide and the construction situation of the slope engineering,the study conducted correlation analysis between rainfall and landslide displacement,the physical and mechanical tests of all types of rocksoil masses,and the numerical simulation testing of seepage field variation of the landslide *** is found that the special slope structure and material composition of the old landslide accumulation layer on the upper part of the Danbo accumulation body are the internal factors for the occurrence of thrust loadinduced landslide,and the construction of the slope engineering not only creates free space conditions for sliding,but also provides channels for the infiltration of rainfall into the slope after confluence,which is an external factor that caused the mechanical properties of the sliding zone soil to gradually weaken from the trailing edge to the leading *** geomechanical model of such landslide is that the active section of the trailing edge produces the"source of force",the transition section of the middle section affects the occurrence of sliding,and the anti-sliding section of the leading edge controls the occurrence of landslide *** results of this research provide not only a useful supplement to the theory of landslide formation mechanisms but also a scientific basis for guiding the prevention and control of similar hazards.

关键词： Colluvial landslide Slope construction Rainfall Induction mechanism Weakening pattern Geomechanical model

Late Pleistocene environmental information on the Diexi paleo-dammed lake of the upper Minjiang River in the eastern margin of the Tibetan Plateau, China

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Journal of Mountain Science 2020年第5期17卷 1172-1187页

作者： WANG Lan-sheng WANG Xiao-qun shen jun-hui YIN Guan CUI Jie XU Xiang-ning ZHANG Zhi-long WAN Tao WEN Li-wang State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China College of Environment geology and Civil Engineering Chengdu University of TechnologyChengdu 610059China College of Earth Sciences Chengdu University of TechnologyChengdu 610059China School of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China Sichuan Bureau of Geology and Mineral Exploration Chengdu 610000China College of Water Resource and Hydropower Sichuan University Chengdu 610000China College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059China

In 1999, Diexi paleo-dammed lake(2349 m a.s.l.) was discovered around Diexi town along the Minjiang River in Sichuan province. Diexi is located where the eastern edge of the Tibetan Plateau and the Sichuan Basin meet. The dammed lake was formed during the Last Glacial Maximum of the Late Pleistocene(~30,000 years ago) and began to empty about 15,000 years ago. The lacustrine sediments(up to 240 m thick) preserve abundant paleoenvironment information. In this paper, a mass of oxygen isotopes and 14 C dating from drilled cores are analyzed and discussed. The δ18 O curve on the paleo climate from this section is comparable with the coeval paleo climatic curves of ice cores and karsts in China and others. Furthermore, the physical model testing has confirmed that the disturbed zones in the core are caused by strong earthquakes occurred at least 10 times, which implies strong crustal deformation, as an important driving force, affecting climate change. This study provides a new window to observe East Asian monsoon formation, paleoenvironmental evolution and the global climate change.

关键词： Late Pleistocene Paleo-dammed lake Paleo climate Earthquake Minjiang River Diexi

Concurrence of Bartter syndrome and minimal change nephrotic syndrome

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Chinese Medical Journal 2009年第15期122卷 1834-1838页

作者： shen hui-jun DAI Yu-wen MAO Jian-hua LIU Ai-min Department of Nephrology Children's Hospital of Zhejiang University School of Medicine Hangzhou Zhejiang 310003 China

Nephrotic syndrome （NS） is a common disease in children with a group of symptoms including heavy proteinuria （≥50 mg/kg per 24 hours）, hypoalbuminaemia, hypercholesterolaemia and edema. Bartter syndrome （BS） is a clinically and genetically heterogenous kidney disease characterized by hypokalemia, hypochloremic metabolic alkalosis, obvious increase of rennin, angiotesin II, and normal blood pressure. Cases of Banter syndrome were frequently reported in recent years, but the Bartter syndrome accompanied by nephrotic syndrome as the first symptom has not been previously reported. Although BS is not classically associated with proteinuria, there have been a few reported cases of concomitant focal segmental glomerulosclerosis （FSGS） with BS.1-6 Recently, Hanevold et al5 and Sardani et al7 respectively described an African American child with BS and proteinuria whose renal biopsy revealed findings consistent with Clq nephropathy （ClqN）, as well as the expected hyperplasia of the juxtaglomerular apparatus （JGA） which is characteristic of BS. It was previously reported that BS was first diagnosed, and then gradually proteinuria followed, but the simultaneous presence of BS and NS is unusual. We herein present a boy with BS and NS whose renal biopsy revealed findings consistent with glomeruli minimal change disease and BS.

关键词： Bartter syndrome nephrotic syndrome, children

PHOTOVOLTAIC BEHAVIOURS OF THE COVALENTLY LINKED PHTHALOCYANINES DERIVATIVES

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Chinese Chemical Letters 1991年第1期2卷 75-76页

作者： Jing Mei XU Xu Rui XIAO Shu Yin shen hui jun XU Institute of Photographic Chemistry,Academia Sinica,Beijing 100101

The photovoltaic behaviours of thin films of novel photosensitizer consisting of cova- lently linked phthalocyanine(Pc)and anthraquinone(AQ)were studied in 0.1mol/L Na_2SO_4 solu- *** results revealed that the higher photovoltage and photocurrent have been obtained due to light induced intra-molecules fast electron transfer in linked Pc-AQ *** effects of different spacer chains between Pc and AQ molecules on photovoltaic behaviours were also discussed.

关键词： Ph

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墩塔焊接钢筋部品刚度计算方法及工程应用

中国公路学报 2023年第9期36卷 172-180页

作者：王敏郑和晖沈惠军张峰中交第二航务工程局有限公司湖北武汉430040 交通运输行业交通基础设施智能制造技术研发中心湖北武汉430040 中交公路长大桥建设国家工程研究中心有限公司湖北武汉430040 东南大学土木工程学院江苏南京210096

针对桥梁墩塔焊接钢筋部品变形计算难题,从揭示焊接钢筋部品整体刚度本质出发,提出了焊点三向转动刚度求解模型。考虑钢筋直径的影响,设计了105组T形焊接钢筋试件及2类加载固定装置,开展了分级加载破坏试验。在此基础上,构建了焊点三向... 详细信息

针对桥梁墩塔焊接钢筋部品变形计算难题,从揭示焊接钢筋部品整体刚度本质出发,提出了焊点三向转动刚度求解模型。考虑钢筋直径的影响,设计了105组T形焊接钢筋试件及2类加载固定装置,开展了分级加载破坏试验。在此基础上,构建了焊点三向转动刚度的力学本构模型,重点分析了模型参数的合理取值方法。研究结果表明:分析焊点三向转动刚度是计算焊接钢筋部品整体刚度的关键,其转动刚度经历一个弹性平台后快速下降;初始刚度、弹性转角和刚度退化率等焊点力学本构模型参数均符合高斯分布;初始刚度受钢筋直径的影响较大且随钢筋直径的减小而降低,弹性转角和刚度退化率基本不受钢筋直径影响;同一钢筋直径下,转向刚度Rx的初始刚度及刚度退化率最大、弹性转角最小,转向刚度Ry的弹性转角最大、初始刚度及刚度退化率最小,转向刚度Rz的初始刚度、弹性转角和刚度退化率均居中。同时,为验证所提本构模型及其参数取值的合理性,分别测试了常泰长江大桥中塔钢筋部品起吊状态下的竖向变形及支撑状态下的平面变形。结果表明:当焊点弯矩-转角本构模型参数取均值时,模拟值与实测值基本吻合良好,说明所提本构模型可较好地量化焊接钢筋部品整体刚度;当焊点弯矩-转角本构模型参数取95%保证率的值时,模拟值大于实测值,取值偏保守。研究结果有望为桥塔、墩柱等混凝土结构焊接钢筋部品设计及施工控制提供理论依据。

关键词：桥梁工程焊接钢筋部品 T形焊接钢筋刚度试验三向转动刚度高斯分布

Genetic Analysis of the Resistance in Six Newly-bred Rice Varieties to the Whitebacked Planthopper,Sogatella furcifera

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Agricultural Sciences in China 2002年第3期1卷 319-322页

作者： LI Xi-ming, MA Liang-yong, LIU Guang-jie, ZHUANG Jie-yun, shen jun-hui and MIN Shaokai(China National Rice Research Institute, Hangzhou 310006) China National Rice Research Institute Hangzhou 310006

The paper reports the study on resistance in 6 newly-bred rice varieties, such as Nongxiang 16 and 9234, to the whitehacked planthopper, Sogatella furcifera. In crossing with the susceptible Taichung Native 1 (TN1), the resistance of their F1 and F2 populations and the back-crossed BC1F1 populations have been evaluated. The resistance to 5. furcifera in Zhenongda 6022, 9234 and Zhongjian 96-3 was controlled by a single dominant gene, and by a single recessive gene in Nongxiang 16, R40 and Shuhui 881, respectively. These varieties possessed good agronomical characteristics and could be used in further rice breeding and rice production.

关键词： Rice Sogatella furcifera Resistance Dominant gene Recessive gene Genetical analysis

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高校技术排他性许可影响因素的实证研究

科学学研究 2019年第6期37卷 1033-1042页

作者：沈慧君徐戈黄灿浙江大学管理学院知识产权管理研究所

基于我国高校与企业间的专利许可数据,本文研究技术成熟度、校企之间的地理距离和校企合作经验如何影响高校采取排他性许可的倾向。当商业化高校的技术伴随着高风险时,企业承诺投入必要资源的意愿降低。本研究认为,合理的许可合同设计... 详细信息

基于我国高校与企业间的专利许可数据,本文研究技术成熟度、校企之间的地理距离和校企合作经验如何影响高校采取排他性许可的倾向。当商业化高校的技术伴随着高风险时,企业承诺投入必要资源的意愿降低。本研究认为,合理的许可合同设计是高校解决该问题的方式之一。排他性许可作为高校创造共同承诺的机制,能够减轻技术不成熟、地理距离劣势和缺少合作经验给企业带来的风险,激励企业投入互补性资产,促进高校科技成果产业化。实证结果表明,技术成熟度越低,高校与企业的合作经验越少,高校采用排他性许可的倾向越高。同时,随着地理距离增加,技术成熟度减少高校进行排他性许可倾向的关系会被削弱。

关键词：排他性许可技术成熟度地理距离合作经验科技成果转化

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装载机负载敏感液压系统优化设计及仿真分析

液压与气动 2022年第1期46卷 117-123页

作者：申慧君陶柳四川省冲压发动机先进制造技术工程实验室四川德阳618000

装载机负载敏感液压系统通过压力补偿作用来维持多路阀前后压差的恒定,补偿压差的存在会造成一定的能量损失,降低系统效率和元件的使用性能及寿命。鉴于此,设计提出了增加节能控制阀来降低多路阀补偿压差的节能负载敏感液压系统,利用AME... 详细信息

装载机负载敏感液压系统通过压力补偿作用来维持多路阀前后压差的恒定,补偿压差的存在会造成一定的能量损失,降低系统效率和元件的使用性能及寿命。鉴于此,设计提出了增加节能控制阀来降低多路阀补偿压差的节能负载敏感液压系统,利用AMESim仿真软件建立仿真模型并进行分析研究。结果表明,在相同的工况下,改进后的负载敏感系统能够降低工作时多路阀的能量损耗,提高系统及元件的性能及使用寿命。

关键词： AMESim 能耗分析节能设计建模仿真