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Penetration Depth of Torpedo Anchor in Two-Layered Cohesive Soil Bed by Free Fall

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China Ocean Engineering 2018年第6期32卷 706-717页

作者： WANG Cheng ZHANG Min-xi yu guo-liang SKLOE CISSE School of Naval Architecture Ocean & Civil Engineering Shanghai Jiao Tong University

The penetration depth of torpedo anchor in two-layered soil bed was experimentally investigated. A total of 177 experimental data were obtained in laboratory by varying the undrained shear strength of the two-layered soil and the thickness of the top soil layer. The geometric parameters of the anchor and the soil properties(the liquid limit, plastic limit, specific gravity, undrained shear strength, density, and water content) were measured. Based on the energy analysis and present test data, an empirical formula to predict the penetration depth of torpedo anchor in two-layered soil bed was proposed. The proposed formula was extensively validated by laboratory and field data of previous researchers. The results were in good agreement with those obtained for two-layered and single-layered soil ***, a sensitivity analysis on the parameters in the formula was performed.

关键词： torpedo anchor penetration depth two-layered soil bed

Experimental Study on the Viscosity of Soft Cohesive Sediments Around A Vibrating Pillar

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China Ocean Engineering 2022年第2期36卷 289-298页

作者： DONG Chuan-ming yu guo-liang ZHANG Huai-xin ZHANG Min-xi SKLOE CISSESchool of Naval ArchitectureOcean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Navigation College Dalian Maritime UniversityDalian 116026China

Offshore structures are subject to environmental loads such as waves,currents,or wind,which may induce cyclic lateral vibration at the *** cyclic vibration loadings may affect the rheological property of the sediments adjacent to the foundation and the stability of the *** is especially true when the structures are founded on cohesive sedimentary *** this study,the viscosity of soft cohesive sediments adjacent to a vibrating pillar was considered,and as a primary index of the rheological characteristics of the *** investigation was performed using the sinking ball *** experimental findings indicated that the viscosity of cohesive sediments decrease with increase of the liquidity index and vibration intensity.A simple semi-empirical formula was *** structures of the cohesive sediments were destroyed due to the mechanical vibration,and the sediments were fluidized during vibration *** shear strength of the cohesive sediments decreased with increased vibration intensity,not only because of the increased pore water pressure but also the decreased viscosity of cohesive sediments following sediment fluidization.

关键词： cohesive sediment vibration intensity viscosity coefficient fluidization liquidity index

Correlation Between Yield Stress of Silty Mud Sediments and Continuous Oscillatory Shearing Properties

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China Ocean Engineering 2022年第2期36卷 223-232页

作者： CHEN Xiao-hui ZHANG Min-xi yuE Shao-lin ZHOU Huan yu guo-liang SKLOE CISSEDepartment of Ocean and Civil Engineering Shanghai Jiao Tong UniversityShanghai 200240China CCCC Road&Bridge Special Engineering Co. Ltd.Wuhan 430061China

Analyzing the rheological properties of silty beds subjected to continuous oscillatory shear loading is crucial for understanding the morphological deformation of the seabed and ensuring safety in geological and marine engineering *** this study,the effects of oscillatory shearing properties on the yield stress(S_(u))of silty sediments were quantitatively *** effects of oscillatory shear strength(0-3),water content(26.6%-70.84%),and particle diameter(8.79-50μm)were examined extensively through a series of laboratory *** results indicated that the three aforementioned parameters were the major factors that affected the rheological characteristics of silty ***,their effects could be elucidated using the yield stress of cohesive sediments as the indicator *** ratio of yield stress(S_(u)/S_(u0))varied as the oscillatory shear strength increased up to a critical value,Λ_(cr).S_(u)bsequently,the ratio remained at a constant *** was deduced that the yield stress decreased with increasing oscillatory shear strength forΛΛ_(cr),the sediments entered an equilibrium fluidization stage,and the yield stress remained almost constant,irrespective of the oscillatory shear ***,during the equilibrium fluidization stage,it was observed that the ratio S_(u)/S_(u0)did not vary with water content but decreased as the particle diameter ***,based on regression analysis of the experimental data for non-equilibrium and equilibrium fluidization stages,a correlation between yield stress of silty sediments and continuous oscillatory shearing properties was *** correlation can aid in understanding the changes in solid resistance and assessing safety in piling ***,it can provide a theoretical guidance for reducing soil resistance in marine structures using mechanical vibrations.

关键词： silty sediments yield stress water content particle diameter oscillatory shear strength

Relationship of Transforming Growth Factor-β1 and Arginase-1 Levels with Long-term Survival after Kidney Transplantation

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Current Medical Science 2018年第3期38卷 455-460页

作者： Xiao-xiao DU yu-liang guo Min YANG Yan yu Sheng CHANG Bin LIU Lan-jun CAI Zhong-Hua Klaus Chen Institute of Organ Transplantation Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Key Laboratory of Organ Transplantation Ministry of Health and Key Laboratory of Organ Transplantation Ministry of Education Wuhan 430030 China Department of Otolaryngology-Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

In this study, we compared the serum levels of transforming growth factor-β1 （TGF-β1）, interleukin-10 （IL-10）, and arginase-1 in long-term survival kidney transplant recipients （LTSKTRs） with those in short-term survival kidney transplant recipients （STSKTRs）. We then evaluated the relationship between these levels and graft function. Blood samples were collected from 50 adult LTSKTRs and 20 STSKTRs （graft survival approximately 1-3 years post-transplantation）. All patients had stable kidney function. The samples were collected at our institution during the patients＇ follow-up examinations between March 2017 and September 2017. The plasma levels of TGF-β1, IL- 10, and arginase- 1 were analyzed using enzyme-linked immunosorbent assays （ELISA）. The levels of TGF-β1 and arginase-1 were significantly higher in the LTSKTRs than in the STSKTRs. The time elapsed since transplantation was positively correlated with the levels of TGF-β1 and arginase-1 in the LTSKTRs. The estimated glomerular filtration rate was positively correlated with the TGF-β1 level, and the serum creatinine level was negatively correlated with the TGF-β1 level. Higher serum levels of TGF-β1 and arginase-1 were found in LTSKTRs than in STSKTRs, and we found that TGF-β1 was positively correlated with long-term graft survival and function. Additionally, TGF-β1 and arginase-1 levels were positively correlated with the time elapsed since transplantation. On the basis of these findings, TGF-β1 and arginase- 1 may play important roles in determining long-term graft survival. Thus, we propose that TGF-β1 and arginase-1 may potentially be used as predictive markers for evaluating long-term graft survival.

关键词： transforming growth factor β1 arginase-1 long-term survival kidney transplant recipients estimated glomerular filtration rates serum creatinine

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家庭教育中的“父母倦怠”:心理健康视角

清华大学教育研究 2021年第6期42卷 21-28页

作者：俞国良中国人民大学心理研究所北京100872

父母倦怠是由于家庭资源和心理需求之间可感知的差异而产生的心理健康问题。从学理与概念溯源上看,它由职业倦怠的概念演化而来,其特点是对孩子养育的退缩、不负责任,情感和身体的衰竭,以及对家庭生活态度消极、情感冷漠,成就感降低等,... 详细信息

父母倦怠是由于家庭资源和心理需求之间可感知的差异而产生的心理健康问题。从学理与概念溯源上看,它由职业倦怠的概念演化而来,其特点是对孩子养育的退缩、不负责任,情感和身体的衰竭,以及对家庭生活态度消极、情感冷漠,成就感降低等,这些都与父母的人格特征、养育压力、亲子关系和生活压力等因素密切相关,上述消极症状对父母和孩子有严重的不良后果。为了缓解、减少和消除父母倦怠现象,全社会应着力建构父母压力源和资源之间的平衡系统,这是维持和促进父母心理健康水平的前提条件。

关键词：家庭教育父母倦怠职业倦怠心理健康问题

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心理健康教育的新诠释:教育效能视角

清华大学教育研究 2024年第1期45卷 110-119页

作者：俞国良中国人民大学心理研究所北京100872

新时代大力提升心理健康教育效能,利在当代功在千秋。心理健康教育效能即学生、教师、管理者和学校有效实现心理健康教育目标的能力,它是心理健康教育高质量发展的重要标志。本文从“教育效能”破题,以中职学校和高等学校调研数据为依据... 详细信息

新时代大力提升心理健康教育效能,利在当代功在千秋。心理健康教育效能即学生、教师、管理者和学校有效实现心理健康教育目标的能力,它是心理健康教育高质量发展的重要标志。本文从“教育效能”破题,以中职学校和高等学校调研数据为依据,从心理健康教育效能的目标、内容和评价指标,以及心理健康教育的教育实施效能和教育管理效能入手,对心理健康教育的丰富内涵进行了重新诠释:学生是心理健康教育效能的第一受益者,教师是心理健康教育效能的主要贡献者,管理者是心理健康教育效能的核心设计者,学校是心理健康教育效能的萃集大成者。坚持不懈追求心理健康教育效能应是心理健康教育的“初心”和主旨。

关键词：心理健康心理健康教育教育效能心理健康教育效能新诠释

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中国学生心理健康问题的检出率及其教育启示

清华大学教育研究 2022年第4期43卷 20-32页

作者：俞国良中国人民大学心理研究所北京100872

根据心理健康问题临床和实践经验,把心理健康问题界定为内化问题和外化问题两类。因为心理健康问题检出率在诸多研究中存在较大分歧,所以我们对我国大中小学生心理健康问题检出率进行了系统研究。检索时间以2010年智能手机产生作为学生... 详细信息

根据心理健康问题临床和实践经验,把心理健康问题界定为内化问题和外化问题两类。因为心理健康问题检出率在诸多研究中存在较大分歧,所以我们对我国大中小学生心理健康问题检出率进行了系统研究。检索时间以2010年智能手机产生作为学生心理健康问题关键影响因素,横跨十年,共检索10424项研究成果,1135项纳入检出率的元分析。其中,小学生101项,初中生222项,高中生252项,大学生560项。被试总人数为3248179名学生。结果表明:(1)小学生心理健康问题检出率由高到低依次是睡眠问题(25.2%)、抑郁(14.6%)、焦虑(12.3%)、攻击行为(4.1%)、退缩(3.8%)、违纪行为(3.7%)、躯体化(3.6%);(2)初中生心理健康问题检出率由高到低依次为焦虑(27%)、抑郁(24%)、自我伤害(22%)、睡眠问题(17%)、自杀意念(17%)、自杀计划(7%)、自杀企图(未遂)(4%);(3)高中生心理健康问题检出率由高到低依次是抑郁(28.0%)、焦虑(26.3%)、睡眠问题(23.0%)、自我伤害(22.8%)、自杀意念(17.1%)、躯体化(9.8%)、自杀计划(6.9%)、自杀企图(未遂)(2.9%);(4)大学生心理健康问题检出率由高到低依次是睡眠问题(23.5%)、抑郁(20.8%)、自我伤害(16.2%)、焦虑(13.7%)、自杀意念(10.8%)、躯体化(4.5%)、自杀未遂(2.7%)。总体而言,我国大中小学生抑郁、焦虑、睡眠问题和自我伤害检出率偏高,其整体心理健康状况堪忧,需要引起全社会的高度警觉。作为一个证据,可资于我国学生心理健康问题检出率的循证及其教育政策编制、心理健康教育实践的依据,有的放矢地对不同年龄学生、不同心理健康问题进行分类预防和精准干预。未来应立足中国大地,着力构建中国特色的心理健康教育长效机制,编制科学的测量工具和筛查标准,建立与完善心理健康动态监测体系和学校心理健康服务体系。

关键词：中国学生心理健康问题检出率元分析教育启示

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Infective Artery Rupture of Renal Allografts:A Single-Center Retrospective Study in China

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Current Medical Science 2022年第4期42卷 847-855页

作者： yu-liang guo Xia LU Lan ZHU Dun-feng DU Bin LIU Zhong-hua Klaus CHEN Song CHEN Wei-jie ZHANG Zhi-shui CHEN Sheng CHANG Institute of Organ Transplantation Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyKey Laboratory of Organ TransplantationMinistry of EducationNHC Key Laboratory of Organ TransplantationKey Laboratory of Organ TransplantationChinese Academy of Medical SciencesWuhan 430030China

Objective:This study investigated the composition of pathogenic microorganisms,clinical features,and therapeutic strategies of infective artery rupture of renal allografts in recipients receiving deceased donor(DD)***:We retrospectively studied the clinical data of the DD kidney transplant recipients with donor-associated infection at Tongji Hospital,Wuhan,China from January 1,2015 to December 31,2018,related recipients and corresponding *** collected the entire results of pathogenic microorganisms cultured from these related ruptured kidneys and then analyzed their distribution and ***:A total of 1440 kidney transplants from DD were performed in our *** total incidence of infective artery rupture in kidney transplants was about 0.76%(11/1440),and the annual incidence ranged from 0.25%to 1.03%.The microbial culture results revealed that 11 recipients suffered from infective artery rupture and 3 recipients who accepted the kidney from same donor had the donor-associated pathogens,including 9 fungal strains(28.1%)and 23 bacterial strains(71.9%).There were 4 recipients infected with multi-drug-resistant Staphylococcus and Klebsiella pneumoniae from the above 11 recipients,of which,10 recipients underwent graft loss,and one died of septic *** microbial cultures of the remaining 3 recipients who received appropriate anti-infective regimens turned negative eventually,and the patients were discharged successfully without significant ***:Renal recipients with infections derived from DDs were at high risk of artery rupture,graft loss,or even *** anti-infective treatment is essential to reduce the incidence of artery rupture and mortality.

关键词： kidney transplantation deceased donor renal artery rupture infection

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文献引用行为中批判性思维的个案研究

外语学刊 2007年第5期 124-128页

作者：余国良宁波工程学院宁波315016

本文针对当前存在的研究生学术英语写作教学中有关文献引用指导的认识误区,按照Swale,Bloch & Chi提供的文献引用分析框架,对浙江省某高校的两位英语专业在读研究生在不同阶段所撰写的4篇研究计划语料进行描述性统计和对比分析,同时辅... 详细信息

本文针对当前存在的研究生学术英语写作教学中有关文献引用指导的认识误区,按照Swale,Bloch & Chi提供的文献引用分析框架,对浙江省某高校的两位英语专业在读研究生在不同阶段所撰写的4篇研究计划语料进行描述性统计和对比分析,同时辅以访谈等手段,探讨学术英语写作教学与批判性思维能力培养的结合问题。

关键词：文献引用学术英语写作批判性思维个案研究