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| 1 | Trends and Challenges for Population and Health During Population Aging——China,2015-2050显示文摘Summary What is already known about this topic?As the largest country in the world,China experienced a demographic transition at a historic scale during the past 50 years with extraordinarily associated changes in the age structure of the population,declining fertility rates,accelerating process of population aging,and growing population scale. | Yanan Luo Binbin Su Xiaoying Zheng | 2021 | China CDC weekly2021，3，28： | 61 |
| 2 | Development of a Haploid-Inducer Mediated Genome Editing System for Accelerating Maize Breeding显示文摘Crop breeding aims to generate pure in bred lines with multiple desired traits. Doubled haploid (DH) and genome editing using CRISPR/Cas9 are two powerful game-changing technologies in crop breeding. However, both of them still fall short for rapid generation of pure elite lines with integrated favorable traits. Here, we report the development of a Haploid-Inducer Mediated Genome Editing (IMGE) approach, which utilizes a maize haploid inducer line carrying a CRISPR/Cas9 cassette targeting for a desired agronomic trait to pollinate an elite maize in bred line and to generate genome-edited haploids in the elite maize background. Homozygous pure DH lines with the desired trait improvement could be generated within two generations, thus bypassing the lengthy procedure of repeated crossing and backcrossing used in conventional breeding for integrating a desirable trait into elite commercial backgrounds. | Baobao Wang Lei Zhu Binbin Zhao Yongping Zhao Yurong Xie Zhigang Zheng Yaoyao Li Juan Sun Haiyang Wang | 2019 | Molecular Plant2019，12，4： | 32 |
| 3 | Evaluation of the Xpert MTB/RIF assay for diagnosis of tuberculosis and rifampin resistance in county-level laboratories in Hunan province, China显示文摘 | Hu Peilei Bai Liqiong Liu Fengping Ou Xichao Zhang Zhiying Yi Songlin Chen Zhongnan Gong Daofang Liu Binbin Guo Jingwei Tan Yunhong | 2014 | Chinese Medical Journal2014，，21： | 24 |
| 4 | Running-in Test and Fractal Methodology for Worn Surface Topography Characterization显示文摘Studying and understanding of the surface topography variation are the basis for analyzing tribological problems,and characterization of worn surface is necessary.Fractal geometry offers a more accurate description for surface roughness that topographic surfaces are statistically self-similar and can be quantitatively evaluated by fractal parameters.The change regularity of worn surface topography is one of the most important aspects of running-in study.However,the existing research normally adopts only one friction matching pair to explore the surface topography change,which interrupts the running-in wear process and makes the experimental result lack authenticity and objectivity.In this paper,to investigate the change regularity of surface topography during the real running-in process,a series of running-in tests by changing friction pairs under the same operating conditions are conducted on UMT-II Universal Multifunction Tester.The surface profile data are acquired by MiaoXAM2.5X-50X Ultrahigh Precision Surface 3D Profiler and analyzed using fractal dimension D,scale coefficient C and characteristic roughness Ra *based on root mean square(RMS) method.The characterization effects of the three parameters are discussed and compared.The results obtained show that there exists remarkable fractal feature of surface topography during running-in process,both D and Ra *increase gradually,while C decreases slowly as the wear-in process goes on,and all parameters tend to be stable when the wear process steps into the normal wear process.Ra *illustrates higher sensitivity for rough surface characterization compared with the other two parameters.In addition,the running-in test carried with a set of identical surface properties is more scientific and reasonable than the traditional one.The proposed research further indicates that the fractal method can quantitatively measure the rough surface,which also provides an evidence for running-in process identification and tribology design. | JI Cuicui ZHU Hua JIANG Wei LU Binbin | 2010 | Chinese Journal of Mechanical Engineering2010，23，5： | 18 |
| 5 | The comprehensive effects of hyperlipidemia and hyperhomocysteinemia on pathogenesis of atherosclerosis and DNA hypomethylation in ApoE-/- mice显示文摘动脉粥样硬化(作为) 疾病被多重因素导致,包括基因、环境的元素。现在的学习的目的是在致病上调查高胆固醇,高蛋氨酸食谱,和 apolipoprotein E 缺乏(ApoE/) 的全面效果作为。ApoE/ 老鼠用高胆固醇和蛋氨酸饮食被喂 15 个星期导致 hyperlipidemia 和 hyperhomocysteinemia。genomic DNA (gDNA ) 和 B1 的 methylation 层次在大动脉的纸巾的重复元素被两 methylation 依赖的限制分析测量并且嵌套 methylation 特定的聚合酶链反应(PCR ) 。Methylation 顺序偏爱模式是由有限制 endonuclease 消化的 DNA 接受甲基的能力的 assayed。DNA methyltransferase-1 的 mRNA 表示, 3 (DNMT1, 3 ) 被即时 PCR 检测。S-adenosylmethionine (SAM ) 和 S-adenosylhomocysteine (SAH ) 的集中被高效的液体层析决定。结果显示出 gDNA 和 B1 的 hypomethylation 重复元素。DNMT1 的 mRNA 表示被减少。SAM, SAH,和 SAM/SAH 比率的层次被增加。动脉粥样硬化患者损害区域强烈与风险因素相关。DNA demethylation 的分发被喜欢而不是 non-CpG 岛,它可以在 DNA 正直和 genomic 不稳定性上建议 hypomethylation 的主要影响。总的来说,我们的数据不含糊地证明高胆固醇,高蛋氨酸食谱,和 ApoE/ 的全面角色不与一个单个风险因素的角色一致地一致。DNA methylation 模式在这是相当复杂的并且取决于基因背景和许多深奥风险因素。 | Yideng Jiang Huiping Zhang Tao Sun Ju Wang Weiwei Sun Huihui Gong Binbin Yang Yingkang Shi Jun Wei | 2012 | Acta Biochimica et Biophysica Sinica2012，44，10： | 16 |
| 6 | Bayesian Reliability Modeling and Assessment Solution for NC Machine Tools under Small-sample Data显示文摘Although Markov chain Monte Carlo(MCMC) algorithms are accurate, many factors may cause instability when they are utilized in reliability analysis; such instability makes these algorithms unsuitable for widespread engineering applications. Thus, a reliability modeling and assessment solution aimed at small-sample data of numerical control(NC) machine tools is proposed on the basis of Bayes theories. An expert-judgment process of fusing multi-source prior information is developed to obtain the Weibull parameters' prior distributions and reduce the subjective bias of usual expert-judgment methods. The grid approximation method is applied to two-parameter Weibull distribution to derive the formulas for the parameters' posterior distributions and solve the calculation difficulty of high-dimensional integration. The method is then applied to the real data of a type of NC machine tool to implement a reliability assessment and obtain the mean time between failures(MTBF). The relative error of the proposed method is 5.8020×10-4 compared with the MTBF obtained by the MCMC algorithm. This result indicates that the proposed method is as accurate as MCMC. The newly developed solution for reliability modeling and assessment of NC machine tools under small-sample data is easy, practical, and highly suitable for widespread application in the engineering field; in addition, the solution does not reduce accuracy. | YANG Zhaojun KAN Yingnan CHEN Fei XU Binbin CHEN Chuanhai YANG Chuangui | 2015 | Chinese Journal of Mechanical Engineering2015，28，6： | 16 |
| 7 | MiR-139-5p inhibits migration and invasion of colorectal cancer by downregulating AMFR and NOTCH1显示文摘MicroRNAs (miRNAs ) 由抑制最近在 carcinogenesis 和转移在我们 non-protein-coding RNA 的角色的理解带给卓见的 posttranscriptional 施加功能。在这研究,我们在 CRC 在 colorectal 癌症(CRC ) 和它的潜在的临床的应用程序描述了函数和 miR-139-5p 的分子的机制。我们发现 miR-139-5p 是显著地, CRC 与邻近的 noncancerous 纸巾(NCT ) 相比取样的在 73.8% 的 downregulated,和减少的 miR-139-5p 与穷人被联系预后。功能的分析证明 miR-139-5p 的那个宫外的表达式在 vivo 在 vitro 和转移压制了 CRC 房间移植和侵略。机械学的调查表明 miR-139-5p 由指向 AMFR 和 NOTCH1 压制 CRC 房间侵略和转移。二基因 phenocopied 击倒 CRC 上的 miR-139-5p 的禁止的效果转移。而且,二基因的蛋白质层次与 NCT 相比是在 CRC 样品的 upregulated,并且相反地与 miR-139-5p 表示相关。增加的 NOTCH1 蛋白质表示与 CRC 病人的差的预后被相关。一起,我们的数据显示 miR-139-5p 为 CRC 是潜在的肿瘤 suppressor 和预示的因素,并且指向 miR-139-5p 可以镇压 CRC 的转移并且改善幸存。 | Mingxu Song Yuan Yin Jiwei Zhang Binbin Zhang Zehua Bian Chao Quan Leyuan Zhou Yaling Hu Qifeng Wang Shujuan Ni Bojian Fei Weili Wang Xiang Du Dong Hua Zhaohui Huang | 2014 | Protein & Cell2014，5，11： | 14 |
| 8 | First observations of low latitude whistlers using WHU ELF/VLF receiver system显示文摘The recently developed high-quality WHU ELF/VLF receiver system has been deployed in Suizhou, China(geomagnetic latitude 21.81°N, longitude 174.44°E, L=1.16) to detect low latitude extremely-low-frequency(ELF: 0.3-3 k Hz) and very-low-frequency(VLF: 3-30 k Hz) emissions originating from either natural or artificial sources since February 2016. During the first-month operation of the receiver system, a total of 3039 clear whistlers have been recorded at this low latitude station with the majority(97.0%) occurring on 28 February and 1 March 2016. Observed whistlers manifest various types including single one-hop, echo train, multi-flash, and multi-path. They tend to intensify after local midnight, reach the peak around 04-05 LT, and then weaken quickly. Both features of lower cutoff frequencies of most whistlers below ~1.6 k Hz and almost uniform dispersion for many successive multi-flash whistlers suggest that these whistlers propagate along the geomagnetic field lines in the duct mode. The computed dispersion varies between ~15 s^(1/2) and 23 s^(1/2) for observed one-hop whistlers and is greater than 50 s^(1/2) for three-hop echo train whistlers, indicating that the whistlers observed at the Suizhou station are low latitude whistlers. | CHEN YanPing NI BinBin GU XuDong ZHAO ZhengYu YANG GuoBin ZHOU Chen ZHANG YuanNong | 2017 | Science China(Technological Sciences)2017，60，1： | 12 |
| 9 | DMM:A dynamic memory mapping model for virtual machines显示文摘Memory virtualization is an important part in the design of virtual machine monitors(VMM).In this paper,we proposed dynamic memory mapping(DMM) model,a mechanism that allows the VMM to change the mapping between a virtual machine's physical memory and the underlying hardware resource while the virtual machine is running.By utilizing DMM,the VMM can implement many novel memory management policies,such as Demand Paging,Swapping,Ballooning,Memory Sharing and Copy-On-Write,while preserving compatibility with various architectures.The modular and hierarchical property of the DMM model efficiently incorporates the high-level policies and the low-level implementations,leading to a feature-adjustable VMM design.We presented the principle of the DMM model,and explained the procedures of various memory management policies under this model.Also,we implement the DMM model in KVM,an open source VMM.Our evaluation shows that the DMM model is efficient enough to provide the benefits of dynamic memory resource management with little performance impact. | CHEN HaoGang WANG XiaoLin WANG ZhenLin ZHANG BinBin LUO YingWei LI XiaoMing | 2010 | Science China(Information Sciences)2010，53，6： | 11 |
| 10 | Existing drugs as broad-spectrum and potent inhibitors for Zika virus by targeting NS2B-NS3 interaction显示文摘Zika 病毒(ZIKV ) 的最近的爆发为治疗学加亮迫切需要。朊酶建筑群 NS2B-NS3 在 flaviviral polyprotein 处理期间起必要作用,并且因此代表一个吸引人的药目标。这里,我们开发了裂口酶识别直接指向 flavivirus NS2B-NS3 相互作用的 orthosteric 禁止者的基于互补的高产量的屏蔽试金。由屏蔽一个总数 2 816 同意了并且 investigational 药,我们识别了三个有势力候选人, temoporfin, niclosamide,和 nitazoxanide,,有 nanomolar 力量的 flavivirus NS2B-NS3 相互作用禁止者。显著地,在老鼠的在人的胎盘、神经的祖先房间的大多数有势力化合物, temoporfin,不是仅仅禁止的 ZIKV 复制,而且阻止的导致 ZIKV 的 viremia 和死亡当模特儿。结构的停靠建议 temoporfin 潜在地绑保持批评 NS2B 残余的 NS3 衣袋,因此禁止以一种非竞争的方式处理的 flaviviral polyprotein。当这些药已经在 USA 或另外的国家在另外的指示任何一个为临床的使用被同意了,他们由 ZIKV 和另外的 flaviviruses 为感染的管理代表有希望、容易开发的治疗。 | Zhong Li Matthew Brecher Yong-Qiang Deng Jing Zhang Srilatha Sakamuru Binbin Liu Ruili Huang Cheri A Koetzner Christina A Allen Susan A Jones Haiying Chen Na-Na Zhang Min Tian Fengshan Gao Qishan Lin Nilesh Banavali Jia Zhou Nathan Boles Menghang Xia Laura D Kramer Cheng-Feng Qin Hongmin Li | 2017 | Cell Research2017，27，8： | 11 |
| 11 | Coal and rock fissure evolution and distribution characteristics of multi-seam mining显示文摘Henan Pingdingshan No.10 mine is prone to both coal and gas outbursts.The E_(9-10)coal seam is the main coal-producing seam but has poor quality ventilation,thus making it relatively difficult for gas extraction.The F_(15)coal seam,at its lower section,is not prone to coal and gas outbursts.The average seam separation distance of 150 m is greater than the upper limit for underside protective seam mining.Based on borehole imaging technology for field exploration of coal and rock fracture characteristics and discrete element numerical simulation,we have studied the evolution laws and distribution characteristics of the coal and rock fissure field between these two coal seams.By analysis of the influential effect of group F coal mining on the E_(9-10)coal seam,we have shown that a number of small fissures also develop in the area some 150 m above the overlying strata.The width and number of the fissures also increase with the extent of mining activity.Most of the fissures develop at a low angle or even parallel to the strata.The results show that the mining of the F_(15)coal seam has the effect of improving the permeability of the E_(9-10)coal seam. | Zhang Dongming Qi Xiaohan Yin Guangzhi Zheng Binbin | 2013 | International Journal of Mining Science and Technology2013，23，6： | 11 |
| 12 | Aqueous extract of Taxus Chinensis (Pilger) Rehd inhibits lung carcinoma A549 cells through the epidermal growth factor receptor/mitogen-activated protein kinase pathway in vitro and in vivo显示文摘OBJECTIVE:To explore the anticancer mechanismof aqueous extract of Taxus Chinensis (Pilger) Rehd (AETC).METHODS: The serum pharmacological method was used to avoid interference from administration of the crude medicinal herbs. Eight purebred New Zealand rabbits were used for preparation of serum containing various concentrations of AETC. Forty-eightBalb/c-nu mice were used for in vivo experiments. The effects of serum containing AETC on the proliferation of A549 cells and expression levels of the epidermal growth factor receptor/mitogen-activated protein kinase(EGFR/MAPK) pathway-related proteins in vitro were investigated. Additionally, the effects on the growth of A549 xenografts in nudemice,and expression levels of the EGFR/MAPK pathway-related proteins in the xenografts,were investigated.RESULTS: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide(MTT) assay revealed that the serum containing AETC significantly decreased the viability of A549 cells in a dose-dependent manner.Western blot showed that the serum containing various concentrations of AETC strongly reduced the levels of phospho-Jun N-terminal kinase(p-JNK) and phospho-extracellular signal-regulated kinase1/2(ERK1/2) while it increased the level of p-p38. However, no significant effects on the expression levels of JNK, ERK1/2, and p38 MAPK were found. In addition, an anticancer effect from AETC was observed invivo in the Balb/c-nu mice bearing A549xenografts.CONCLUSION: AETC has significant effects on the growth of A549 xenografts and on the activity of the EGFR/MAPK pathway. Therefore, AETC may be beneficial in lung carcinoma treatment. | Qijin Shu Minhe Shen Binbin Wang Qingli Cui Xiaoying Zhou Luming Zhu | 2014 | Journal of Traditional Chinese Medicine2014，34，3： | 10 |
| 13 | Influence of N on precipitation behavior,associated corrosion and mechanical properties of super austenitic stainless steel S32654显示文摘The influence of N on the precipitation behavior,associated corrosion,and mechanical properties of S32654 were investigated by microstructural,electrochemical,and mechanical analyses.Increasing the N content results in several alterations:(1) grain refinement,which promotes intergranular precipitation;(2) a linear increase in the driving force for Cr2 N and Mo activity,which accelerates the precipitation of intergranular Cr2 N and π phase,respectively;(3) a linear decrease in the driving force for σ phase and Cr activity,which suppresses the formation of intragranular σ phase.The total amount of precipitates first decreased and then increased with the N content increasing.Furthermore,the intergranular corrosion susceptibility depended substantially on the total amount of precipitates and also first exhibited a decreasing and then an increasing trend as the N content increased.In addition,aging precipitation caused a considerable decrement in the ultimate tensile strength(UTS) and a remarkable increment in the yield strength(YS).Both the UTS and YS always increased with N content increasing throughout the solution and aging process.Whereas the elongation was considerably sensitive to the aging treatment,it exhibited marginal variation with the N content increasing. | Shucai Zhang Huabing Li Zhouhua Jiang Zhixing Li Jingxi Wu Binbin Zhang Fei Duan Hao Feng Hongchun Zhu | 2020 | Journal of Materials Science & Technology2020，42，7： | 10 |
| 14 | Magnetohydrodynamics (MHD) numerical simulations on the interaction of the solar wind with the magnetosphere: A review显示文摘The magnetosphere is the outermost layer of the geospace, and the interaction of the solar wind with the magnetosphere is the key element of the space weather cause-and-effect chain process from the Sun to Earth, which is one of the most challenging scientific problems in the geospace weather study. The nonlinearity, multiple component, and time-dependent nature of the geospace make it very difficult to describe the physical process in geospace using traditional analytic analysis approach. Numerical simulations, a new research tool developed in recent decades, have a deep impact on the theory and application of the geospace. MHD simulations started at the end of the 1970s, and the initial study was limited to two-dimensional (2D) cases. Due to the intrinsic three-dimensional (3D) characteristics of the geospace, 3D MHD simulations emerged in the 1980s, in an attempt to model the large-scale structures and fundamental physical processes in the magnetosphere. They started to combine with the space exploration missions in the 1990s and make comparisons with observations. Physics-based space weather forecast models started to be developed in the 21st century. Currently only a few space-power countries such as USA and Japan have developed 3D magnetospheric MHD models. With the rapid advance of space science in China, we have developed a new global MHD model, namely PPMLR-MHD, which has high order spatial accuracy and low numerical dissipation. In this review, we will briefly introduce the global 3D MHD modeling, especially the PPMLR-MHD code, and summarize our recent work based on the PPMLR-MHD model, with an emphasis on the interaction of interplanetary shocks with the magnetosphere, large-scale current systems, reconnection voltage and transpolar potential drop, and Kelvin-Helmholtz (K-H) instability at the magnetopause. | WANG Chi GUO XiaoCheng PENG Zhong TANG BinBin SUN TianRan LI WenYa HU YouQiu | 2013 | Science China Earth Sciences2013，56，7： | 10 |
| 15 | Understanding formation mechanism of ZnO diatomic chain and multi-shell structure using physical mechanics:Molecular dynamics and first-principle simulations显示文摘In this paper,the possibility of the monatomic chain (MC) formation for ZnO material was studied by molecular dynamics (MD) simulation.The process of MC formation and the effects of temperature,strain rate and size were studied extensively.The tensile process can be divided to be five stages and the ZnO diatomic chain (DC) can be found.The MD results show that most atoms in MC came from the original surface of ZnO nanowires (NWs).Temperature and strain rate are two important factors affecting the process,and both high temperature and low strain rate in a certain range would be beneficial to the formation of DC.Moreover,the effects of strain rate and temperature could attribute to the Arrhenius model and the energy release mechanism.Furthermore,multi-shell structure was found for the samples under tensile strain and the layer-layer distance was about 3.Our studies based on density functional theory showed that the most stable structure of ZnO DC was confirmed to be linear,and the I-V curve was also got using ATK. | WANG BinBin WANG FengChao ZHAO YaPu | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，6： | 9 |
| 16 | The mechanism of neogambogic acid-induced apoptosis in human MCF-7 cells显示文摘Neogambogic 酸(NGA ) ,在 garcinia 的活跃成分,能在 anticancer 效果禁止一些稳固的肿瘤和结果的生长。我们假设那 NGA 可能为人的乳癌房间线 MCF-7 房间的增长的抑制负责。在 vitro 调查它的 anticancer 机制, MCF-7 房间与 NGA 的各种各样的集中被对待。试金显示出的 MTT (甲基 thiazolyl tetrazolum ) 的结果有 NGA 的那治疗显著地以一种剂量依赖者方式减少了 MCF-7 房间的增长。NGA 能增加 anti-apoptotic 蛋白质 Bcl-2 的表示由 mitochondrial transmembrane 损坏伴随了的 apoptosis 相关的蛋白质 FasL, caspase-3, caspase-8, caspase-9,和 Bax 和减少的表示。MCF-7 房间上的 NGA 的 antiproliferative 效果由于 Fas/FasL 和细胞色素 C 小径的 G0/G1 拘捕,增加的 apoptosis 和激活。这些结果提供重要卓见进 NGA 通过损害乳癌房间的增长的细胞、分子的机制。 | Keming Wang Yuhong Tang Ming Sun Binbin Lu Hongqin Zhu Ou Ji Qun Shen | 2011 | Acta Biochimica et Biophysica Sinica2011，43，9： | 9 |
| 17 | The GWmodel R package:further topics for exploring spatial heterogeneity using geographically weighted models显示文摘In this study,we present a collection of local models,termed geographically weighted(GW)models,which can be found within the GWmodel R package.A GW model suits situations when spatial data are poorly described by the global form,and for some regions the localized fit provides a better description.The approach uses a moving window weighting technique,where a collection of local models are estimated at target locations.Commonly,model parameters or outputs are mapped so that the nature of spatial heterogeneity can be explored and assessed.In particular,we present case studies using:(i)GW summary statistics and a GW principal components analysis;(ii)advanced GW regression fits and diagnostics;(iii)associated Monte Carlo significance tests for non-stationarity;(iv)a GW discriminant analysis;and(v)enhanced kernel bandwidth selection procedures.General Election data-sets from the Republic of Ireland and US are used for demonstration.This study is designed to complement a companion GWmodel study,which focuses on basic and robust GW models. | Binbin LU Paul HARRIS Martin CHARLTON Chris BRUNSDON | 2014 | Geo-Spatial Information Science2014，17，2： | 9 |
| 18 | Pollution characteristics and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of the southern part of the Haihe River system in China显示文摘The southern part of the Haihe River system, the largest river system in the Haihe River Basin, is important to maintain a healthy ecosystem and safe drinking water as well as for the economic development of China. To assess the effect of rapid industrialization and urbanization on the pattern of polycyclic aromatic hydrocarbon (PAH) contamination, the PAH pollution characteristics of the southern part of the Haihe River system was investigated. Sixteen PAHs in surface sediments samples collected from 24 sites covering the southern part of the Haihe River system from the upstream to the estuaries were detected and analyzed. The total PAH concentration ranged from 258.77 to 11296.66 ng/g dry weight. On average, 2-, 3-, 4-, 5and 6-ring PAHs comprised 25.32%, 27.22%, 22.62%, 14.89% and 9.96% of the total PAHs, respectively. Sites with high concentrations were concentrated in the Fuhe River, Fuyang River and Wei River, which are located near cities. A risk quotient (RQ) was used to assess the ecological risk of PAHs. The mean values of the RQ(MPCs) of individual PAHs were lower than 1.00, except for those of naphthalene (2.00) and pyrene (1.67). The RQPAHs calculated for the samples indicated that the Xidayang reservoir and the estuary of the Ziya River were determined to be at a low risk level, while Baoding City, Handan City and Aixinzhuang were determined to be at a high risk level. | LIU Feng LIU JingLing CHEN QiuYing WANG BinBin CAO ZhiGuo | 2013 | Chinese Science Bulletin2013，58，27： | 9 |
| 19 | A novel enriched CB shell element method for simulating arbitrary crack growth in pipes显示文摘In this work, a novel numerical method is developed for simulating arbitrary crack growth in pipes with the idea of enriched shape functions which can represent the discontinuity independent of the mesh. The concept of the enriched shape functions is introduced into the continuum-based (CB) shell element. Due to the advantage of CB shell element, the shell thickness varia- tion and surface connection can be concerned during the deformation. The stress intensity factors of the crack in the CB shell element are calculated by using the 'equivalent domain integral' method for 3D arbitrary non-planar crack. The maximum en- ergy release rate is used as a propagation criterion. This method is proved able to capture arbitrary crack growth path in pipes which is independent of the element mesh. Numerical examples of different fracture patterns in pipes are presented here. | ZHUANG Zhuo CHENG BinBin | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，8： | 9 |
| 20 | Optimal sensor placement in health monitoring of suspension bridge显示文摘Structural health monitoring(SHM) provides an effective approach to ensure the safety of structures.However,with the restriction of the cost of sensor system and data processing,only a small number of sensors could be available in the health monitoring system(HMS).In order to obtain the best identification of structural characteristics,optimal sensor placement(OSP) becomes an inevitable task in the design of HMS.This paper introduces the process for determining the OSP in HMS of a suspension bridge,in which four different OSP methods have been investigated,including the effective independence(EI) method,the effective independence driving-point residue(EFI-DPR) method,the minimized modal assurance criterion(minMAC) method and the principal subset selection-based extended EI(PSS-EI) method.Then,three criteria,which are modal assurance matrix(MAC),condition number(CN) of mode shape matrix and determinant of Fisher information matrix(FIM),were employed to evaluate the effect of the OSP methods respectively.The result showed that the PSS-EI method developed has the ability to guarantee the highest determinant of FIM,a relatively small off-diagonal term of MAC and agreeable CN,as well as the deployment of sensors in a uniform and symmetric fashion for the studied bridge.Finally,the scheme obtained by PSS-EI was adopted in the HMS. | LI BinBin LI DongSheng ZHAO XueFeng OU JinPing | 2012 | Science China(Technological Sciences)2012，55，7： | 9 |
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