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曲率模态和小波包变换在结构损伤识别中的应用

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振动与冲击 2008年第1期27卷 124-126页

作者：王振林聂国华同济大学航空航天与力学学院上海200092

小波包变换相比传统的Fourier变换,对非平稳信号分析具有良好的特性。利用小波包变换的特性,根据曲率模态损伤检测原理提出了一种基于小波包组分能量变化率作为损伤指标的分析方法。通过一简支梁结构的数值模拟,表明该方法对于判定损伤... 详细信息

小波包变换相比传统的Fourier变换,对非平稳信号分析具有良好的特性。利用小波包变换的特性,根据曲率模态损伤检测原理提出了一种基于小波包组分能量变化率作为损伤指标的分析方法。通过一简支梁结构的数值模拟,表明该方法对于判定损伤存在和确定损伤位置是有效的。

关键词：小波包变换损伤识别曲率模态

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变截面门式刚架结构分析的微分求积单元法

力学季刊 2005年第2期26卷 198-203页

作者：聂国隽仲政同济大学固体力学教育部重点实验室

本文采用一种精确、简便的数值计算方法———微分求积单元法(DQEM)对变截面门式刚架结构进行了力学分析。首先建立了一般荷载作用下变截面构件的平衡微分方程,并采用微分求积法进行离散,进而得出了较为精确的分析变截面构件的单元力学... 详细信息

本文采用一种精确、简便的数值计算方法———微分求积单元法(DQEM)对变截面门式刚架结构进行了力学分析。首先建立了一般荷载作用下变截面构件的平衡微分方程,并采用微分求积法进行离散,进而得出了较为精确的分析变截面构件的单元力学模型。该模型的刚度方程不仅反映了单元的刚度性质,而且反映了单元的实际荷载作用,可较为精确地分析变截面门式刚架结构在分布载荷作用下的受力性能。通过与有限元法计算结果的比较,表明了微分求积单元法在变截面刚架的力学分析中的正确性和优越性。微分求积单元法可用于任意形状的刚架结构的静力分析。

关键词：变截面构件门式刚架结构微分求积单元法

具有任意连接和约束的空间杆系结构静力分析的回传波矩阵法

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力学季刊 2008年第4期29卷 544-555页

作者：蔡国强聂国华同济大学航空航天与力学学院上海200092 太原理工大学土木系太原030024

本文发展了具有任意连接和约束的空间杆系结构静力分析的回传波矩阵法。以杆端位移和转角为基本未知量,通过结构所有节点的平衡方程和位移协调条件,推导出传递分配矩阵和载荷源向量,并进一步利用设定的同一杆件两个局部坐标系下杆端位... 详细信息

本文发展了具有任意连接和约束的空间杆系结构静力分析的回传波矩阵法。以杆端位移和转角为基本未知量,通过结构所有节点的平衡方程和位移协调条件,推导出传递分配矩阵和载荷源向量,并进一步利用设定的同一杆件两个局部坐标系下杆端位移之间的关系,最终得到结构的回传矩阵。据此可求出结构所有杆件的杆端位移及杆端内力。对不同的杆件连接形式,如刚接、铰接、半刚接,以及不同的约束情况,如固定支座、铰支座、定向支座等,本文推导出了空间杆系结构的回传波矩阵表达式,可直接用于相应空间杆系结构内力的计算。同时,针对一个具体刚架结构进行了算例分析,并通过与弯矩分配法和有限元结果的比较,验证了本文方法的精确度。

关键词：空间杆系结构回传波矩阵法传递分配矩阵载荷源向量弯矩分配法

Triple the steady-state reaction rate by decorating the In_(2)O_(3)surface with SiO_(x)for CO_(2)hydrogenation

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Journal of Energy Chemistry 2024年第8期95卷 96-105,I0003页

作者： Hao Wang Chun Yang Xiaoyan Yu Mingrui Wang Runze Yang Xiaowa nie Ben Hang Yin Alex C.K.Yip Chunshan Song Guanghui Zhang Xinwen guo State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsPSU-DUT Joint Center for Energy ResearchSchool of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina Department of Chemistry the Chinese University of Hong KongHong Kong 999077China Paihau-Robinson Research Institute the MacDiarmid Institute for Advanced Materials and NanotechnologyVictoria University of WellingtonWellington 6012New Zealand Department of Chemical and Process Engineering The University of CanterburyChristchurch 8041New Zealand

Indium oxide(In_(2)O_(3)),as a promising candidate for CO_(2)hydrogenation to C_(1) products,often suffers from sintering and activity decline,closely related to the undesirable structural evolution under reaction *** on the comprehension of the dynamic evolution,this study presents an efficient strategy to alleviate the agglomeration of In_(2)O_(3)nanoparticles by the surface decoration with highly dispersed silica species(SiO_(x)).Various structural characterizations combined with density functional theory calculations demonstrated that the sintering resulted from the over-reduction,while the enhanced stability originated from the anchoring effect of highly stable In-OSi bonds,which hinders the substantial formation of metallic In(In^(0))and the subsequent agglomeration.0.6Si/In_(2)O_(3)exhibited CO_(2)conversion rate of10.0 mmol g^(-1)h^(-1)at steady state vs.3.5 mmol g^(-1)h^(-1)on In_(2)O_(3)in CO_(2)*** steady-state activity was also achieved on Pd-modified *** to the traditional Pd/In_(2)O_(3)catalyst,the methanol production rate of Pd catalyst supported on 0.6Si/In_(2)O_(3)was enhanced by 23%,showing the potential of In_(2)O_(3)modified by SiO_(x)in serving as a platform *** work provides a promising method to design new In_(2)O_(3)-based catalysts with improved activity and stability in CO_(2)hydrogenation.

关键词： CO_(2)hydrogenation In_(2)O_(3)sintering Dynamic structural evolution Surface SiO_(x)modification DFT simulations

DIR:Dynamic Request Interleaving for Improving the Read Performance of Aged Solid-State Drives

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Journal of Computer Science & Technology 2024年第1期39卷 82-98页

作者：聂世强张驰伍卫国 Department of Computer Science and Technology Xi'an Jiaotong UniversityShaanci 710049China

Triple-level cell(TLC)NAND flash is increasingly adopted to build solid-state drives(SSDs)for modern computer *** TLC NAND flash effectively improves storage density,it faces severe reliability issues;in partic-ular,the pages exhibit different raw bit error rates(RBERs).Integrating strong low-density parity-check(LDPC)code helps to improve reliability but suffers from prolonged and proportional read latency due to multiple read retries for worse *** straightforward idea is that dispersing page-size data across several pages in different types can achieve a low-er average RBER and reduce the read ***,directly implementing this simple idea into flash translation lay-er(FTL)induces the read amplification issue as one logic page residing in more than one physical page brings several read *** this paper,we propose the Dynamic Request Interleaving(DIR)technology for improving the performance of TLC NAND flash-based SSDs,in particular,the aged ones with large *** exploits the observation that the la-tency of an I/O request is determined,without considering the queuing time,by the access of the slowest device page,i.e.,the page that has the highest *** grouping consecutive logical pages that have high locality and interleaving their encoded data in different types of device pages that have different RBERs,DIR effectively reduces the number of read re-tries for LDPC with limited read *** meet the requirement of allocating hybrid page types for interleaved data,we also design a page-interleaving friendly page allocation scheme,which splits all the planes into multi-plane re-gions for storing the interleaved data and single-plane regions for storing the normal *** pages in the multi-plane re-gion can be read/written in parallel by the proposed multi-plane command and avoid the read amplification *** on the DIR scheme and the proposed page allocation scheme,we build DIR-enable FTL,which integrates the pro

关键词： triple-layer cell solid-state drive(TLC SSD) performance interleaving data unbalanced bit error rate

Autophagy Alleviates Cold Exposure-induced Tight Junction Injury in Murine Ileum

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Biomedical and Environmental Sciences 2024年第7期37卷 800-804页

作者： Jingru guo Jing Xu Leichong Chen Huijie Hu Junshu nie Jianbin Yuan Li Ma Jingjing Lu Hong Ji Bin Xu Key Laboratory of Bovine Disease Control in Northeast China Ministry of Agriculture and Rural affairsHeilongjiang Provincial Key Laboratory of Prevention and Control of Bovine DiseasesCollege of Animal Science and Veterinary MedicineHeilongjiang Bayi Agricultural UniversityDaqing 163319HeilongjiangChina

Cold exposure is a pervasive stressor in the polar and subpolar regions,exerting both acute and chronic effects on *** environmental factor is known to induce physiological stress,compromise immune response efficacy,and increase susceptibility to various *** cold exposure,characterized by repetitive nonconsecutive exposure to suboptimal temperatures over an extended duration.

关键词： acute exposure susceptibility

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试论湿瘀虚在慢性肾炎辨治中的意义

辽宁中医杂志 2008年第7期35卷 1020-1022页

作者：郭聂涛广东省中山市中医院广东中山528400

从中医学的角度,探讨"湿、瘀、虚"在慢性肾炎辨证论治中的意义,并从湿邪、瘀血、虚证的病机分析及治疗特点进行探讨。

关键词：慢性肾炎湿瘀虚辨证论治中医药疗法

Erratum to:Efficient and stable perovskite solar cells by build-inπ-columns and ionic interfaces in covalent organic frameworks

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Nano Research 2024年第5期17卷 4639-4640页

作者： Riming nie Xiaokai Chen Zhongping Li Weicun Chu Si Ma Changqing Li Xiaoming Liu Yonghua Chen Zhuhua Zhang Wanlin guo State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratoryfor Itligent Nano Materials and Devices of the Ministry of EducationInstitute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNarnjing 210016China Department of Chemical and Biomolecular Engineering Yonsei Universit50 Yonsei roSeodaemun-guSeoul 120749Republic of Korea College of Chemistry jilin UniversityChangchun 130012China Department of Energy and Chemical Engineering Ulsan National Instute of Science and Technology(UNIST)50 UNIST-gilEonyang-eupUju-gunUlsan 44919Republic of Korea Key Laboratory of Flexible Electronics(KLoFE) School of Flexible Electronics(Future Technologies)&Institute of Advanced Materials(IAM)Nanjing Tech University(Nanjing Tech)Nanjing 211816China

Erratum to Nano Research,2023,16(7):9387-9397 htps:/***/0.100/1274-023-5603-040(1)One sentence in the article was unfortunately mispresented on page *** of As shown in Fig.S19 in the ESM,the A2/A2 values of the refere... 详细信息

关键词： COF columns perovskite

Single-cell transcriptomics reveals the ameliorative effect of rosmarinic acid on diabetic nephropathy-induced kidney injury by modulating oxidative stress and inflammation

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Acta Pharmaceutica Sinica B 2024年第4期14卷 1661-1676页

作者： Junhui Chen Qian Zhang Jinan guo Di Gu Jing Liu Piao Luo Yunmeng Bai Jiayun Chen Xinzhou Zhang Sheng nie Chunbo Chen Yulin Feng Jigang Wang National Pharmaceutical Engineering Center for Solid Preparation of Chinese Herbal Medicine Jiangxi University of Chinese MedicineNanchang 330006China Department of Pulmonary and Critical Care Medicine Shenzhen Institute of Respiratory Diseasesand Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalFirst Affiliated Hospital of Southern University of Science and TechnologySecond Clinical Medical College of Jinan UniversityShenzhen 518020China School of Traditional Chinese Medicine and School of Pharmaceutical Sciences Southern Medical UniversityGuangzhou 510515China Department of Urology and Shenzhen Clinical Research Centre for GeriatricsShenzhen People's Hospitalthe First Affiliated HospitalSouthern University of Science and TechnologyShenzhen 518020China Department of Urology the First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510230China Department of Nephrology Shenzhen Key Laboratory of Kidney Diseasesand Shenzhen Clinical Research Centre for GeriatricsShenzhen People's Hospitalthe First Affiliated HospitalSouthern University of Science and TechnologyShenzhen 518020China Department of Nephrology Nanfang Hospitalthe First Affiliated Hospital of Southern Medical UniversityGuangzhou 510515China Department of Critical Care Medicine Shenzhen People's Hospital(the Second Clinical Medical CollegeJinan Universitythe First Affiliated HospitalSouthern University of Science and Technology)Shenzhen 518020China State Key Laboratory for Quality Esurance and Sustainable Use of Dao-di Herbs Artemisinin Research Centerand Institute of Chinese Materia MedicaChina Academy of Chinese Medical SciencesBeijing 100700China Department of Oncology the Affiliated Hospital of Southwest Medical UniversityLuzhou 646000China

Diabetic nephropathy(DN)is a severe complication of diabetes,characterized by changes in kidney structure and *** natural product rosmarinic acid(RA)has demonstrated therapeutic effects,including anti-inflammation and anti-oxidative-stress,in renal damage or *** this study,we characterized the heterogeneity of the cellular response in kidneys to DN-induced injury and RA treatment at single cell *** results demonstrated that RA significantly alleviated renal tubular epithelial injury,particularly in the proximal tubular S1 segment and on glomerular epithelial cells known as podocytes,while attenuating the inflammatory response of macrophages,oxidative stress,and cytotox-icity of natural killer *** findings provide a comprehensive understanding of the mechanisms by which RA alleviates kidney damage,oxidative stress,and inflammation,offering valuable guidance for the clinical application of RA in the treatment of DN.

关键词： Rosmarinic acid Diabetic nephropathy scRNA sequencing Injury Oxidative stress Infiammation Proteomics