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Global Geology 2013年第3期16卷 159-163页

作者： XU Xiaohui CHEN Hui'e wang gangcheng College of Construction Engineering Jilin University

On the basis of geological investigating work and experimental studies on slide zone soil of one landslide in Tibet,the authors analyzed granulometric composition,clay mineral composition and physical and mechanical properties for the soil in the slide *** soil samples are gravel containing fine *** larger than 2 mm occupy the main proportion with the content 51.5%--68.5%.The relative content of clay minerals is *** clay minerals are illite smectite mixed layer and kaolinite,and their relative contents are 6%--13% and 4%-11%,*** main mineral ingredient is quartz and the relative content is over 30%.Therefore,the soil’s hydrophily is *** cohesion and internal friction angle are high,causing preferable physical-mechanical features of slide zone *** the basis of the obtained data,the landslide stability is evaluated by means of limit equilibrium *** safety factors are 3.191 and 1.92 respectively under both natural and normal water level *** study results show that the landslide is *** can provide the appropriate basis and reference for landslide stability evaluation and landslide control in Tibet.

关键词： slide zone soil granulometric composition clay mineral composition physical-mechanical proper-ty landslide stability analysis

Chinese expert consensus on standardized treatment for presacral cysts

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Gastroenterology Report 2023年第1期11卷 593-603页

作者： gangcheng wang Chengli Miao Department of General Surgery Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Retroperitoneal Tumor Surgery Peking University International HospitalBeijingChina

Presacral cysts are cystic or cyst–solid lesions between the sacrum and rectum,almost involving adjacent pelvic floorstructures including sacrococcygeal fascia,rectum,and anal *** cysts are usually benign,currently believed to arise from aberrant *** cysts are clinically rare and the true incidence is *** resection remains the major treatment for presacral *** the cysts are completely resected,recurrence is *** cysts or hard-to-heal sinuses in the sacrococcyx cause patients extreme ***,the current knowledge of presacral cysts is *** are occasionally confused with other diseases such as ovarian cysts and perianal ***,lack of the correct surgical concept and skills leads to palliative treatment for complex presacral cysts and serious complications such as impairing the function of the anal sphincter or important blood vessels and *** consensus summarizes the opinions and experiences of multidisciplinary experts in presacral cysts and aims to provide clinicians with a more defined concept of the treatment,standardize the surgical approach,and improve the efficacy of presacral cysts.

关键词： pelvic cavity presacral space presacral cyst retrorectal tumors consensus

Research on clogging mechanism of loose foundation

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Global Geology 2012年第2期15卷 140-144页

作者： wang Yuanyuan wang gangcheng CAO Yu College of Construction Engineering Jilin University Changchun 130026 Jilin China

Combining with the indoor clogging tests of loose foundation in Tibet,the permeability clogging process of loose foundation was simulated based on particle flow method. Under the constant head of 2.2m, numerical micro-simulation was made in three cases,which was not adding any clogging materials,or adding the clogging materials with the diameter between 0.075-0.500 mm and 0.5-1 mm. The dynamic changes of fluid velocity,permeability coefficient,porosity and loss amount were recorded in the numerical simulation. The results have shown that fluid velocity and permeability coefficient decreased rapidly,when adding the clogging materials with the diameter between 0.5 mm and 1.0 mm. With seepage stability,fluid velocity value was very low. By using computer simulation in the two cases,we got that both cases induced clogging effect. Clogging effect was due to one of the interval of particles rather than one size,which could be seen in the phenomenon of the second case. To some extent,numerical method is useful in the study of clogging problems,which gave the same result obtained in laboratory test and simulation test. These data provided basis and reference for further study of clogging problems,and also provided a new method to study the micro-scale permeability clogging mechanism.

关键词： loose foundation clogging mechanism particle flow model

Research on effect of clogging process on permeability of loose dam foundation of plateau reservoir

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Global Geology 2012年第4期15卷 291-296页

作者： XU Wenming ZHAO Shuyun wang gangcheng College of Construction Engineering Jilin University

Taking Zhuoyu reservoir in Shannan of Tibet as the test site,the authors collected soil samples for laboratory analysis,and devised infiltration-clogging equipment for laboratory test to research the effect of clogging process on permeability of loose dam foundation of plateau *** laboratory test,the soil can cause clogging effect by itself,and the effect of clogging is relative to the water *** clogging effect can be caused obviously by adding fine particles,and the clogging effect of the particles with 0.063-0.25 mm diameter is best,which verifies the rationality of the optimal diameter *** provides the realistic significance for the anti-seepage of the plateau reservoir dam foundation.

关键词： clogging test clogging effect permeability diameter interval

Effect of Deformation between Stands on the Strip Shape in Hot Rolling

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International Journal of Minerals,Metallurgy and Materials 2000年第3期14卷 222-224页

作者： Qinghai Wu, Jie Zhang, Changsong wang, gangcheng Wei, Ping Song, Changhe Deng ( Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083, China Wuhan Iron & Steel Corporation) Mechanical Engineering School University of Science and Technology Beijing Beijing 100083 China Wuhan Iron and Steel Corporation China

A theoretical model about the secondary deformation is developed by the combination of analytical and experimental approaches. A system simulation based on the model is completed to predict the strip profile after the interstand deformation. On the other hand, comprehensive experiments and quantitative comparisons are made to calibrate the model for a wide variety of products. As a result, the correction of the model has been verified by the actual rolling data from production mill and it is helpful to improve the strip shape control.

关键词： hot rolling strip shape secondary deformation

Research on infiltration clogging effect and its application prospect in anti-seepage project

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Global Geology 2009年第2期12卷 112-116页

作者： HUANG Zhiquan wang gangcheng ZHANG Guojun College of Construction Engineering Jilin University Changchun 130026 China Liaoning Electric Power Survey Design Institute Shenyang 110005 China

Clogging effect,as a new concept in geological engineering,is a phenomenon of permeability decreasing under seeping in reservoir dam foundation of the alluvial and diluvial deposits with deep and thick layer,coarse particle and high permeability in mountains-gully rivers of Tibetan Plateau.A clogging infiltration instrument has been designed successfully and a series of simulation tests have been *** on large amounts of data,it is confirmed that the existence of the clogging effect and the law of infiltration clogging is found *** indexes are proposed such as "optimal size of particle","optimal size range of particle" and "characteristic pore",which are closely related with effect of infiltration *** concept and results can offer a new idea to solve problems on anti-seepage of dam foundation in mountains-gully rivers environment and to study artificial clogging,meanwhile supplement of the concept of seepage deformation.

关键词： seepage deformation clogging effect characteristic pore optimal size of particle optimal size range of particle

基于Kriging代理模型的船舶水动力性能多目标快速协同优化

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上海交通大学学报 2018年第6期52卷 666-673页

作者：王刚成马宁顾解忡上海交通大学海洋工程国家重点实验室高新船舶与深海开发装备协同创新中心上海200240

引入Kriging代理模型,对船舶兴波阻力、垂荡和纵摇运动幅值进行了多目标快速优化.优化过程中,以Rankine源非线性势流理论和三维频域面元法为基础,利用非支配排序遗传算法(NSGA-Ⅱ)并结合船体曲面修改函数对船体型线进行多目标优化设计,... 详细信息

引入Kriging代理模型,对船舶兴波阻力、垂荡和纵摇运动幅值进行了多目标快速优化.优化过程中,以Rankine源非线性势流理论和三维频域面元法为基础,利用非支配排序遗传算法(NSGA-Ⅱ)并结合船体曲面修改函数对船体型线进行多目标优化设计,将高精度Kriging代理模型引入到优化进程中以解决迭代造成的耗时难题.数值分析结果表明:该优化方法能够使船型最优,在设计吃水、服务航速下有效减少航行阻力并提高耐波性能,且Kriging代理模型方法可以大幅提高船型优化效率.最后,基于雷诺平均(RANS)方程的计算流体动力学(CFD)方法对模型尺度λ为31.599的最优船型的阻力结果进行了对比验证,以证明优化结果的可靠性.

关键词：多目标优化 Kriging代理模型阻力耐波性雷诺平均方程

基于数量化理论Ⅲ的滑坡发育影响因素及耦合作用强度分析

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岩石力学与工程学报 2010年第6期29卷 1206-1213页

作者：李军霞王常明王钢城刘伟吉林大学建设工程学院吉林长春130026 西藏自治区地质环境监测总站西藏拉萨850001

探讨西藏朗县研究区内滑坡发育的地质环境影响因素,借助GIS技术将影响因素指标量化,采用数量化理论III对滑坡发育的影响因素及其耦合作用强度进行分类分析。结果表明,对区内滑坡发育起主导作用的是降雨因素、坡体岩性、平均坡度、坡体... 详细信息

探讨西藏朗县研究区内滑坡发育的地质环境影响因素,借助GIS技术将影响因素指标量化,采用数量化理论III对滑坡发育的影响因素及其耦合作用强度进行分类分析。结果表明,对区内滑坡发育起主导作用的是降雨因素、坡体岩性、平均坡度、坡体前缘河流影响距,起重要作用的是坡体高度、外营力与人类工程活动、地震烈度因素,起一般作用的是土地利用因素;确定出年均降雨量、含残坡积物和绢云母千枚岩的滑坡体岩性、200m内的河流影响距、35°～45°的平均坡度、地震烈度、高于200m的坡体高度因素为滑坡发育的主控因素,可为区内开展滑坡评价工作提供依据;区内29个滑坡的影响因素耦合作用强度以±0.01为界进行强、中等、弱分级,耦合作用强度越高,滑坡发育程度及潜在危险性越高,对区内防灾减灾具有重要的指导意义;对分析结果以实地调查的可靠性验证,表明数量化理论III的可行性与适用性,为滑坡灾害影响因素的研究提供新的思路。

关键词：边坡工程滑坡数量化理论Ⅲ 影响因素

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骶前囊肿的诊疗探讨

结直肠肛门外科 2022年第2期28卷 109-114页

作者：王刚成郑州大学附属肿瘤医院/河南省肿瘤医院普外科河南郑州450000

骶前囊肿为一种发生于骶前间隙的先天性囊性疾病,多数为良性疾病,目前认为其起源与胚胎发育异常有关。骶前囊肿临床少见,发病率为1:60000~1:40000,主要见于幼儿及成年女性患者(男女比例为1:15)[1-2]。由于该类疾病的发病率低,大部分外... 详细信息

骶前囊肿为一种发生于骶前间隙的先天性囊性疾病,多数为良性疾病,目前认为其起源与胚胎发育异常有关。骶前囊肿临床少见,发病率为1:60000~1:40000,主要见于幼儿及成年女性患者(男女比例为1:15)[1-2]。由于该类疾病的发病率低,大部分外科医师对其认识模糊,甚至将骶前囊肿与卵巢囊肿、肛周脓肿等疾病相混淆,随之相关治疗也影响了患者的健康恢复。

关键词：肛周脓肿骶前囊肿成年女性外科医师良性疾病卵巢囊肿骶前间隙囊性疾病

西藏山南地区水库松散坝基渗透变形试验及机理研究

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水文地质工程地质 2016年第1期43卷 57-63,93页

作者：李识博王常明邹婷婷王钢城马建全西安科技大学地质与环境学院陕西西安710054 吉林大学建设工程学院吉林长春130026 中国市政工程东北设计研究总院吉林长春130021

对选自西藏山南地区高山宽谷河流区松散坝基土体进行室内渗透变形试验研究,设置不同级配定水头高度及相同级配变水头高度的3组对比试验方案。分析试验中水力梯度及渗透系数的变化情况,将松散坝基渗透试验过程分为颗粒调整、渗流稳定、... 详细信息

对选自西藏山南地区高山宽谷河流区松散坝基土体进行室内渗透变形试验研究,设置不同级配定水头高度及相同级配变水头高度的3组对比试验方案。分析试验中水力梯度及渗透系数的变化情况,将松散坝基渗透试验过程分为颗粒调整、渗流稳定、渗流变化三个阶段。根据试验现象,结合以往渗透变形模式研究,将渗透变形划分为三类:渗透压密、渗透破坏及渗透淤堵。结合渗透变形的力学特征,对这三类渗透变形机理进行分析,并对单个土颗粒受力分析,得出在渗透压密、渗透破坏及渗透淤堵过程中运动颗粒的受力情况。试验结果表明添加淤堵材料有助于减缓、减小基部掏蚀的发生、发展,为该类松散坝基防渗减渗工作提供理论依据。

关键词：松散坝基渗透变形渗透压密基部掏蚀渗透淤堵