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Consolidation of high replacement ratio stone column-reinforced ground:Analytical solutions incorporating clogging effect

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3311-3326页

作者： Jinxin Sun Mengmeng lu Baolong xu Jie shan school of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou221116China Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou221006China

The utilization of stone columns has emerged as a popular ground improvement strategy,whereas the drainage performance can be adversely hampered by clogging *** the ample progress of calculation methods for the consolidation of stone column-improved ground,theoretical investigations into the clogging effect have not been thoroughly ***,it is imperative to involve the column consolidation deformation to mitigate computational error on the consolidation of composite ground with high replacement *** this context,an analytical model accounting for the initial clogging and coupled time and depth-dependent clogging of stone columns is ***,the resulting governing equations and analytical solutions are obtained under a new flow continuity relationship to incorporate column consolidation *** accuracy and reliability of the proposed model are illustrated by degradation analysis and case studies with good ***,the computed results of the current study are juxtaposed against the existing models,and an in-depth assessment of the impacts of several crucial parameters on the consolidation behavior is *** results reveal that ignoring column consolidation deformation leads to an overestimate of the consolidation rate,with maximum error reaching up to 16%as the replacement ratio ***,the initial clogging also has a significant influence on the consolidation ***,the increment of depth and time-clogging factors a and b will induce a noticeable retardation of the consolidation process,particularly in the later stage.

关键词： Consolidation Composite ground Stone column Clogging effect Ground improvement Analytical model

Factor Structure and Longitudinal Invariance of the CES-D across Diverse Residential Backgrounds in Chinese Adolescents

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International Journal of Mental Health Promotion 2024年第4期26卷 261-269页

作者： Yanjing Cao Chenchen xu Qi Li shan lu Jing Xiao beijing Key Laboratory of Learning and Cognition and Department of Psychology Capital Normal UniversityBeijing100048China Center for Child Development Capital Normal UniversityBeijing100048China

Background:Valid and reliable measures of depressive symptoms are crucial for understanding risk factors,outcomes,and interventions across rural and urban *** this need,the longitudinal invariance of these measures over time remains *** research explores the structural components of the Center for Epidemiological Studies Depression Scale(CES-D)and examines its consistency across various living environments and temporal stability in a cohort of Chinese ***:In the initial phase,1,042 adolescents furnished demographic details and undertook the CES-D *** a three-month interval,967 of these participants repeated the CES-D *** study employed Confirmatory factor analysis(CFA)to scrutinize the scale’s structural *** investigated factorial invariance by conducting a twopronged CFA:one comparing urban *** backgrounds,and another contrasting the results from the initial assessment with those from the ***:The CES-D demonstrated adequate reliability in both rural and urban high school student *** preliminary four-factor model applied to the CES-D demonstrated a good fit with the collected *** tests,including multigroup analyses comparing rural and urban samples and longitudinal assessments,confirmed the scale’s ***:The results suggest that the CES-D serves as a reliable instrument for evaluating depressive symptoms among Chinese *** applicability is consistent across different living environments and remains stable over time.

关键词： Depression factor structure measurement invariance Chinese adolescent longitudinal invariance

Deep brain implantable microelectrode arrays for detection and functional localization of the subthalamic nucleus in rats with Parkinson’s disease

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Bio-Design and Manufacturing 2024年第4期7卷 439-452页

作者： luyi Jing Zhaojie xu Penghui Fan Botao lu Fan Mo Ruilin Hu Wei xu Jin shan Qianli Jia Yuxin Zhu Yiming Duan Mixia Wang Yirong Wu Xinxia Cai State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China school of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

The subthalamic nucleus(STN)is considered the best target for deep brain stimulation treatments of Parkinson’s disease(PD).It is difficult to localize the STN due to its small size and deep *** microelectrode arrays(MEAs)can rapidly and precisely locate the STN,which is important for precise *** this paper,16-channel MEAs modified with multiwalled carbon nanotube/poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(MWCNT/PEDOT:PSS)nanocomposites were designed and fabricated,and the accurate and rapid identification of the STN in PD rats was performed using detection sites distributed at different brain *** results showed that nuclei in 6-hydroxydopamine hydrobromide(6-OHDA)-lesioned brains discharged more intensely than those in unlesioned *** addition,the MEA simultaneously acquired neural signals from both the STN and the upper or lower boundary nuclei of the ***,higher values of spike firing rate,spike amplitude,local field potential(LFP)power,and beta oscillations were detected in the STN of the 6-OHDA-lesioned brain,and may therefore be biomarkers of STN *** with the STNs of unlesioned brains,the power spectral density of spikes and LFPs synchronously decreased in the delta band and increased in the beta band of 6-OHDA-lesioned *** may be a cause of sleep and motor disorders associated with ***,this work describes a new cellular-level localization and detection method and provides a tool for future studies of deep brain nuclei.

关键词： Functional localization Implantable microelectrode arrays Parkinson’s disease Subthalamic nucleus

Plasma Metabonomics of Human Adenovirus-infected Patients with Pneumonia and Upper Respiratory Tract Infection

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Current Medical Science 2024年第1期44卷 121-133页

作者： Ting-ting WEI Wen xu Bo TU Wan-xue ZHANG Xin-xin YANG Yiguo ZHOU shan-shan ZHANG Jun-lian YANG Ming-zhu XIE Juan DU Wei-wei CHEN Qing-bin lu Department of Epidemiology and Biostatistics School of Public HealthPeking UniversityBeijing 100191China Department of Infectious Disease The Fifth Medical Center of Chinese PLA General HospitalNational Clinical Research Center for Infectious DiseasesBeijing 100039China Department of Laboratorial Science and Technology&Vaccine Research Center School of Public HealthPeking UniversityBeijing 100191China Department of Health Policy and Management School of Public HealthPeking UniversityBeijing 100191China Global Center for Infectious Disease and Policy Research&Global Health and Infectious Diseases Group Peking UniversityBeijing 100191China Key Laboratory of Epidemiology of Major Diseases(Peking university) Ministry of EducationBeijing 100191China

Objective Human adenovirus(HAdV)infection is common and can develop to serious conditions with high mortality,yet the mechanism of HAdV infection remains *** the present study,the serum metabolite profiles of HAdV-7-infected patients with pneumonia or upper respiratory tract infection(URTI)were *** In total,35 patients were enrolled in the study following an outbreak of HAdV-7 in the army,of whom 14 had pneumonia and 21 had *** samples were collected at the acute stage and at the recovery stage and were analyzed by untargeted *** Over 90% of the differential metabolites identified between the pneumonia patients and URTI patients were lipids and lipid-like molecules,including glycerophospholipids,fatty acyls,and *** metabolic pathways that were significantly enriched were primarily the lipid metabolism pathways,including sphingolipid metabolism,glycerophospholipid metabolism,and linoleic acid *** sphingolipid metabolism was identified as a significantly differential pathway between the pneumonia patients and URTI patients and between the acute and recovery stages for the pneumonia patients,but not between the acute and recovery stages for the URTI *** and lactosylceramide,involved in sphingolipid metabolism,were significantly higher in the pneumonia patients than in the URTI patients with good discrimination abilities[area under curve(AUC)0.742 and 0.716,respectively;combination AUC 0.801].Conclusion Our results suggested that HAdV modulated lipid metabolism for both the patients with URTI and pneumonia,especially the sphingolipid metabolism involving ceramide and lactosylceramide,which might thus be a potential intervention target in the treatment of HAdV infection.

关键词： human adenovirus metabonomic lipids pneumonia upper respiratory tract infection

Side-Chain-Type Polyimide-Cu Complexes with Suppressed Activation Energy of Relaxation for Advanced High-Temperature Capacitor

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Chinese Journal of Polymer Science 2024年第8期42卷 1038-1048页

作者： Bai-Yang Zhou Ze-Tong Ma Shi-Long Zhong Zhen-Jie Huang Qi Guo Deng-Chong Feng Zhong-Ke Yuan Shao-Lin lu Yu-Zhao Yang Cheng Wang Ding-shan Yu xu-Dong Chen Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangdong Engineering Technology Research Centre for High Performance Organic and Polymer Photoelectric Functional FilmsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China school of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Laboratory of Chemistry and Fine Chemical Industry Jieyang Centre Jieyang 515200China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031China

The burgeoning growth of the new energy vehicles and aviation industry has escalated the need for energy storage capacitors capable of stable operation in harsh *** advent of metal-polyimide complexes has illuminated a novel approach for preparing tem perature-resistant ***,the general application of these metal-polyimide com plexes is impeded by the high dielectric loss and low breakdown strength,consequences of main-chain coordination and excessive metal ions ***,our study proposes a novel polyimideCu complex material(POP-Cu)predicated on side-chain-type pyridine-Cu coordination,utilizing the structural backbone PMDA-ODA of mature commercial PI(Kapton)with reliable *** to the high degree of freedom afforded by the side chain with suppressed relaxation activation energy and the long-range electron delocalization formed by d-πcoordination,the dielectric constant of this material containing merely 2.7 mol%Cu increases from 3.25(POPI)to 5.58,while maintaining a remarkably low dielectric loss of ***,this material exhibits a substantial DC breakdown strength of 436.2 MV·m^(-1)and a high energy density of 5.42 J·cm^(-3),coupled with superior mechanical and thermal *** at 150℃,it retains over 90%of its room-temperature energy density,demon strating notable dielectric stability under high *** attributes underscore its promising application for capacitors operating in harsh environments.

关键词： Dielectric performance Polyimide complexes Side-Chain-Type High-temperature capacitor

Recent progress and strategies of cathodes toward polysulfides shuttle restriction for lithium-sulfur batteries

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Rare Metals 2024年第9期43卷 4132-4161页

作者： Xing-You Rao Shuang-Fei Xiang Jian Zhou Zhen Zhang Xiang-Yu xu Yuan-Yuan xu Xin-Chi Zhou Zheng-Dao Pan Su-Chong Tan Shi-Xing Dong Zhou-lu Wang Yu-Tong Wu Yun-Lei Zhou Xiang Liu Yi Zhang shan Jiang school of Energy Sciences and Engineering Nanjing Tech University school of Materials Science and Engineering and Institute of Smart Fiber Materials Zhejiang Sci-Tech University JiangSu Sailboat Petrochemical Co. Ltd Hangzhou Institute of Technology Xidian University

Lithium-sulfur batteries(LSBs) have already developed into one of the most promising new-generation high-energy density electrochemical energy storage systems with outstanding features including high-energy density, low cost, and environmental friendliness. However, the development and commercialization path of LSBs still presents significant limitations and challenges, particularly the notorious shuttle effect triggered by soluble longchain lithium polysulfides(LiPSs), which inevitably leads to low utilization of cathode active sulfur and high battery capacity degradation, short cycle life, etc. Substantial research efforts have been conducted to develop various sulfur host materials capable of effectively restricting the shuttle effect. This review firstly introduces the fundamental electrochemical aspects of LSBs, followed by a comprehensive analysis of the mechanism underlying the shuttle effect in Li–S batteries and its profound influence on various battery components as well as the overall battery performance. Subsequently, recent advances and strategies are systematically reviewed, including physical confinement, chemisorption, and catalytic conversion of sulfur hosts for restricting LiPSs shuttle effects. The interplay mechanisms of sulfur hosts and LiPSs are discussed in detail and the structural advantages of different host materials are highlighted. Furthermore, key insights for the rational design of advanced host materials for LSBs are provided, and the upcoming challenges and the prospects for sulfur host materials in lithium-sulfur batteries are also explored.

关键词： Host Lithium-sulfur batteries Polysulfides Shuttle effect

316L奥氏体不锈钢高温单拉和蠕变行为的实验和晶体塑性模拟研究

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Acta Mechanica Sinica 2024年第2期40卷 268-282页

作者：宋世杰阙前华刘宇杰包陈陆晓翀张旭 Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace EngineeringSouthwest Jiaotong UniversityChengdu610031China school of Aeronautics and astronautics Sichuan UniversityChengdu610065China

316L奥氏体不锈钢(ASS)因其优异的抗蠕变性和耐腐蚀性被广泛应用于核反应堆中的包壳材料.但由于核反应堆长期处于高温环境,其包壳材料会不断累积蠕变损伤并最终导致性能退化,进而影响设备的安全运行.因此,为保障核反应堆的安全服役,针... 详细信息

316L奥氏体不锈钢(ASS)因其优异的抗蠕变性和耐腐蚀性被广泛应用于核反应堆中的包壳材料.但由于核反应堆长期处于高温环境,其包壳材料会不断累积蠕变损伤并最终导致性能退化,进而影响设备的安全运行.因此,为保障核反应堆的安全服役,针对其包壳材料高温蠕变行为的研究具有重要意义.基于此,我们开展了316L ASS在高温下的单轴拉伸变形和蠕变行为的研究.结果表明,316L ASS的力学响应具有明显的温度依赖性,且在特定的温度范围(723 K-923 K)和应变率(1.3×10−3 s−1)条件下,显示出明显的动态应变时效效应;此外,316L ASS在高温条件下的主要蠕变机制为位错攀移机制,它一方面会影响位错密度的演化,另一方面会影响位错越过障碍物的激活频率.基于316L ASS在高温下的微结构演化机理,我们建立了基于位错机制的晶体塑性本构模型.在该模型中额外考虑了位错攀移机制对刃型位错湮灭、位错偶极子形成和刃型位错越过障碍物的贡献.最终结果表明,该模型能有效地模拟和预测316L ASS在高温条件下的单轴拉伸和蠕变响应,而该研究成果也为316L ASS的蠕变性能评估提供了重要的理论依据.

关键词： 316L奥氏体不锈钢动态应变时效刃型位错位错攀移晶体塑性蠕变性能蠕变行为温度依赖性

Study of tree shrew biology and models: A booming and prosperous field for biomedical research

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Zoological Research 2024年第4期45卷 877-909页

作者： Yong-Gang Yao Li lu Rong-Jun Ni Rui Bi Ceshi Chen Jia-Qi Chen Eberhard Fuchs Marina Gorbatyuk Hao Lei Hongli Li Chunyu Liu Long-Bao Lv Kyoko Tsukiyama-Kohara Michinori Kohara Claudia Perez-Cruz Gregor Rainer Bao-Ci shan Fang Shen An-Zhou Tang Jing Wang Wei Xia xueshan Xia Ling xu Dandan Yu Feng Zhang Ping Zheng Yong-Tang Zheng Jumin Zhou Jiang-Ning Zhou Key Laboratory of Genetic Evolution and Animal Models Yunnan Key Laboratory of Animal Models and Human Disease MechanismsKunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650204China National Research Facility for Phenotypic&Genetic Analysis of Model Animals(Primate Facility) and National Resource Center for Non-Human PrimatesKunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650107China KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650204China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan 650204China Mental Health Center and Psychiatric Laboratory West China HospitalSichuan UniversityChengduSichuan 610041China Sichuan Clinical Medical Research Center for Mental Disorders ChengduSichuan 610044China German Primate Center Leibniz Institute of Primate ResearchGöttingen 37077Germany Department of Optometry and Vision Science School of OptometryUniversity of Alabama at BirminghamBirminghamAL 35294USA State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhanHubei 430071China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanHubei 430074China Soong Ching Ling Institute of Maternity and Child Health International Peace Maternity and Child Health HospitalShanghai Jiao Tong University School of MedicineShanghai 200030China Transboundary Animal Diseases Center Joint Faculty of Veterinary MedicineKagoshima UniversityKagoshima-cityKagoshima 890-8580Japan Department of Microbiology and Cell Biology Tokyo Metropolitan Institute of Medical ScienceTokyo 156-8506Japan Pharmacology Department CinvestavMexico City 07360Mexico Department of Medicine University of FribourgFribourg CH-1700Switzerland beijing Engineering Research Center of Radiog

The tree shrew(Tupaia belangeri)has long been proposed as a suitable alternative to non-human primates(NHPs)in biomedical and laboratory research due to its close evolutionary relationship with *** recent years,significant advances have facilitated tree shrew studies,including the determination of the tree shrew genome,genetic manipulation using spermatogonial stem cells,viral vector-mediated gene delivery,and mapping of the tree shrew brain ***,the limited availability of tree shrews globally remains a substantial challenge in the ***,determining the key questions best answered using tree shrews constitutes another *** shrew models have historically been used to study hepatitis B virus(HBV)and hepatitis C virus(HCV)infection,myopia,and psychosocial stress-induced depression,with more recent studies focusing on developing animal models for infectious and neurodegenerative *** these efforts,the impact of tree shrew models has not yet matched that of rodent or NHP models in biomedical *** review summarizes the prominent advancements in tree shrew research and reflects on the key biological questions addressed using this *** emphasize that intensive dedication and robust international collaboration are essential for achieving breakthroughs in tree shrew *** use of tree shrews as a unique resource is expected to gain considerable attention with the application of advanced techniques and the development of viable animal models,meeting the increasing demands of life science and biomedical research.

关键词： Tree shrew Animal model Neurodegenerative diseases Infectious diseases Neuroscience Phenome

母亲元情绪理念与幼儿社会-情绪问题行为:忽视干涉惩罚和环境气氛的中介作用

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中国临床心理学杂志 2024年第1期32卷 182-186,192页

作者：许清凝刘少英徐路鑫周燕青石雷山浙江理工大学理学院杭州310018 浙江理工大学科技与艺术学院绍兴312300 杭州钱塘凌云幼儿园杭州310018 杭州钱塘星辰幼儿园杭州310018 丽水学院教师教育学院丽水323000

目的:考察母亲元情绪理念与幼儿社会-情绪问题行为的关系,并检验母亲忽视/干涉/惩罚行为和环境气氛的中介作用。方法:采用横断设计,邀请杭州市770名4~6岁幼儿母亲填写父母元情绪理念量表、3~6岁儿童家庭养育环境量表和年龄与发育进程问... 详细信息

目的:考察母亲元情绪理念与幼儿社会-情绪问题行为的关系,并检验母亲忽视/干涉/惩罚行为和环境气氛的中介作用。方法:采用横断设计,邀请杭州市770名4~6岁幼儿母亲填写父母元情绪理念量表、3~6岁儿童家庭养育环境量表和年龄与发育进程问卷:社会-情绪第2版。结果:母亲情绪教导和情绪摒除会直接或通过忽视/干涉/惩罚和环境气氛间接作用于幼儿的社会-情绪问题行为,母亲情绪紊乱会通过忽视/干涉/惩罚和环境气氛间接作用于幼儿的社会-情绪问题行为。结论:母亲元情绪理念显著预测幼儿社会-情绪问题行为,并且忽视/干涉/惩罚和环境气氛在母亲元情绪理念和幼儿社会-情绪问题行为间起到中介作用。

关键词：社会-情绪问题行为母亲元情绪理念忽视/干涉/惩罚环境气氛幼儿