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| 1 | Damage and progressive failure of concrete structures using non-local peridynamic modeling显示文摘Peridynamics (PD), a recently developed theory of solid mechanics, which employs a non-local model of force interaction and makes use of integral formulation rather than the spatial partial differential equations used in the classical continuum mechanics theory, has shown effectiveness and promise in solving discontinuous problems at both macro and micro scales. In this paper, the peridynamics theory is used to analyze damage and progressive failure of concrete structures. A non-local peridynamic model for a rectangular concrete plate is developed, and a central pairwise force function is introduced to describe the interior interactions between particles within some definite distance. Damage initiation, evolution and crack propagation in the concrete model subject to in-plane uni-axial tension, in-plane uni-axial compression and out-of-plane impact load are investigated respectively. The numerical results show that discontinuities appear and grow spontaneously as part of the solution to the peridynamic equations of motion, and no special failure criteria or re-meshing techniques are required, which proves the potential of peridynamic modeling as a promising technique for analyzing the progressive failure of concrete materials and structures. | HUANG Dan1,2, ZHANG Qing1,2 & QIAO PiZhong1,3 1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China 2 Department of Engineering Mechanics, Hohai University, Nanjing 210098, China 3 Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USA | 2011 | Science China(Technological Sciences)2011，54，3： | 24 |
| 2 | Modeling of elastic wave propagation on a curved free surface using an improved finite-difference algorithm显示文摘Based on existing direct and imaging methods of a staggered finite-difference scheme, an improved algorithm for staggered finite-difference is proposed to implement rugged topographic free boundary conditions. This method assumes that the free surface can be implemented with horizontal and vertical free surface segments and their corners; the free surface passes through the grid points of shear stress components, instead of the normal stress components. Imaging is carried out for stress components in both horizontal and vertical directions, thus increasing the accuracy. To update particle- velocities, imaging and updating are first performed in the horizontal direction, and then in the vertical direction. The numerical results for elastic flat horizontal free surface with the imaging method and those for flat free surfaces of various slope angles with the proposed method are compared, and are shown to be in good agreement. The advantage of the proposed method is that only the stresses are dealt with in implementing the free surface into the staggered algorithm, which improves computation efficiency. | WANG Xiuming1,3 & ZHANG Hailan2 1. CSIRO Petroleum, ARRC, PO BOX 1130, Technology Park, Bentley, WA 6102, Australia 2. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China 3. Present address: Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，5： | 11 |
| 3 | Challenges and strategies in high-accuracy manufacturing of the world’s largest SiC aspheric mirror显示文摘In the process of manufacturing the world’s largest silicon carbide(SiC)aspheric mirror,the primary difficulties are mirror blank preparation,asphere fabrication,and testing,as well as cladding and coating.Specifically,the challenges include the homogeneity of the complicated structure casting,accuracy and efficiency of the fabrication process,print-through effect,fidelity and precision of test procedure,stress and denseness of cladding process,the dynamic range of interferometric measurement,and air turbulence error due to the long optical path.To break through such a barrier of difficulties,we proposed the water-soluble room temperature vanishing mold and gel casting technology,homogeneous microstructure reaction-formed joint technology,nano-accuracy efficient compound fabrication,gravity unloading technology,high-denseness low-defect physical vapor deposition(PVD)Si-cladding technology,test data fusion method,and time-domain averaging method,etc.Based on the proposed technologies and methods,we have accomplished the world’s largest SiC aspheric mirror with a size of φ4.03 m.The impressive performance of the SiC aspheric mirror is validated by the characteristics of the fabricated SiC aspheric mirror.The aerial density of the SiC blank is less than 120 kg/m^(2),surface shape test accuracy is better than 6 nm RMS,thickness inhomogeneity of the cladding layer is less than 5%,and the final surface figure error and roughness are 15.2 nm RMS and 0.8 nm RMS,respectively. | Xuejun Zhang Haixiang Hu Xiaokun Wang Xiao Luo Ge Zhang Wenxing Zhao Xiaoyi Wang Zhenyu Liu Ling Xiong Erhui Qi Congcong Cui Yanchao Wang Yingjie Li Xu Wang Longxiang Li Yang Bai Qiang Cheng Zhiyu Zhang Ruigang Li Wa Tang Xuefeng Zeng Weijie Deng Feng Zhang | 2022 | Light(Science & Applications)2022，11，12： | 3 |
| 4 | Hydrocarbon accumulation in network and its application in the continental rift basin显示文摘The concept of hydrocarbon accumulation in network was presented on basis of the overall analysis of the formation and evolution characteristics of the continental faulted basin and of the systemic re-search on the major controlling factors on the hydrocarbon accumulation. The hydrocarbon accumu-lation in network can be defined as hydrocarbon accumulation in a three-dimensional network system which is constituted by the hydrocarbon migration passages under multiple dynamics,following the hydrocarbon generation from source rocks. The research shows that the hydrocarbon accumulation in network is composed of four elements,i.e.,hydrocarbon source (source rock kitchen),hydrocarbon accumulation terminal (trap),network pathway connecting source and terminal (transporting system),and network potential driving hydrocarbon migration in the network pathway (migration dynamics). Compared with other networks,hydrocarbon accumulation in network has three basic characteristics: the irreversible geological process of material and information flow in the network; the loss of material and information in the flow process in the network; the multiple dynamics in the flow process. Interac-tion of all the elements in the geological process can be called hydrocarbon accumulation in network. There are three basic models for hydrocarbon accumulation in network,that is,hydrocarbon accumu-lation in the network source area,hydrocarbon accumulation in the network pathway,and hydrocarbon accumulation in the network terminal. The key in the application of the hydrocarbon accumulation models in network in practice is to confirm the major accumulation stage and the function range of the four elements controlling the hydrocarbon firstly,to predict the profitable accumulation region by su-perposition of the favorable areas confirmed by four elements consequently,and to evaluate the oil-bearing property of the trap as well as confirm drilling targets. This paper takes the Dongying De-pression in the Bohai Bay Basin as an application example. | PANG XiongQi1,2,CHEN DongXia1,ZHANG ShanWen3,HAO Fang1,LIU Zheng1,LIU KeYu3,SONG GuoQi4,WANG YongShi4,LUO XiaoRong5 & WU XiaoChun61 State Key Laboratory of Petroleum Resource and Prospecting,Chinese University of Petroleum,Beijing 102249,China 2 Basin and Reservoir Center,Chinese University of Petroleum,Beijing 102249,China 3 SINOPEC Shengli Oilfield,Dongying 257051,China 4 CSIRO Petroleum,P. O. Box 1130,Bentley,WA 6102,Australia 5 Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,China 6 China National Petroleum Corporation,Beijing 100724,China | 2008 | Science China Earth Sciences2008，51，S2： | 3 |
| 5 | Expression profiles of miRNAs in human pancreatic cancer cell lines显示文摘目的将开始由微数组技术在人的胰腺的癌症房间线分析 miRNAs 表示侧面的差别。743 根探针全部的方法 A 根据人,老鼠,和老鼠的已知的 miRNAs 序列被设计。miRNAs 微数组被生产,它的可靠被验证。全部的 RNA 被提取, miRNAs 与胰腺的癌症房间衬里的人(SW1990, Capan-2, BxPC-3, Aspc-1,和 Panc1 ) 和不朽的人被分开胰腺的管上皮的房间线 H6C7。他们用 T4 RNA ligase 被标记,当时是有微数组的 hybridized。通过数组扫描和分析,在胰腺的癌症的 miRNAs 表达式侧面被获得。结果被北弄污和 RT-PCR 验证。与胰腺的癌症有关的 63 miRNAs 全部的结果 A 被发现是在 5 根胰腺的癌症房间线表示的差别,包括 25 下面调整并且 38 起来调整的 miRNAs。mir-21 和 let-7 的表情也被证实。结果建议了侧面能在胰腺的癌症房间被发现的那 miRNAs 表情的结论。 | Shineng Zhang Haijun Zuo Zhong Yu Fengting Huang Wa Zhong | 2009 | The Chinese-German Journal of Clinical Oncology2009，8，2： | 3 |
| 6 | Alleviation of arsenic toxicity by phosphate is associated with its regulation of detoxification,defense,and transport gene expression in barley显示文摘Arsenic(As) contamination in soils has posed a severe threat to safe crop production. The previous studies showed the antagonism between phosphorus(P) and As in plant growth and As uptake, while the mechanisms of alleviating As toxicity by P is not completely clear. Due to the limiting P condition, it is imperative to understand how low P addition can be used to suppress arsenate As(V) uptake and the subsequent mechanisms involved. Thus in this study we investigated the effect of P addition on As uptake, anti-oxidative enzyme activity, and anti-oxidant content, and the relative expression of transport, defense, and detoxification genes using two barley genotypes differing in As toxicity tolerance. P addition significantly reduced As concentration in plant tissues, and caused the great changes in activities of catalase and superoxide dismutase, glutathione content, and the relative expression of examined genes when the plants of the two barley genotypes were exposed to 100 μmol L^(–1) As, with ZDB160(As-tolerant) being much more affected than ZDB475(As-sensitive). The current results show that P addition can alleviate As toxicity by regulating the expression of As transport, defense, and detoxification genes to a greater extent in As tolerance of barley, suggesting the possibility of controlling As uptake and toxicity by applying low amount of P fertilizers in the As-contaminated soils. | Gerald Zvobgo Jonas Lwalaba Wa Lwalaba Tichaona Sagonda James Mutemachani Mapodzeke Noor Muhammad Imran Haider Shamsi ZHANG Guo-ping | 2019 | Journal of Integrative Agriculture2019，18，2： | 2 |
| 7 | CFTR mediates bicarbonate-dependent activation of miR-125b in preimplantation embryo development显示文摘尽管 HCO 3− 被知道为早胚胎开发被要求,它的准确角色留下逃犯。这里,我们报导 HCO 3− 在在 preimplantation 胚胎开发期间通过调停 CFTR 的流入调整 miR-125b 表示充当环境暗示。结果证明在 preimplantation 胚胎开发的 HCO 3− 的效果能被介入压制一条 HCO 3−-conducting 隧道的函数, CFTR,由一个特定的禁止者或基因大美人。细胞外的 HCO 3− 的移动或 CFTR 的抑制在 2 个房间阶段老鼠胚胎减少 miR-125b 表示。miR-125b 击倒模仿 HCO 3− 移动和 CFTR 抑制的效果,当 miR-125b 先锋的注射颠倒它时。在人和老鼠胚胎的 miR-125b upregulates p53 串联的 Downregulation。miR-125b 的激活被显示被 sAC/PKA-dependent 调停 NF-κ 的原子 shuttling; B。这些结果在在 preimplantation 胚胎开发期间连接环境 HCO 3− 到 miR-125b 的激活的信号 transduction 揭示了 CFTR 的一个关键角色并且在 miRNAs 的规定显示了离子隧道的重要性。 | Yong Chao Lu Hui Chen Kin Lam Fok Lai Ling Tsang Mei Kuen Yu Xiao Hu Zhang Jing Chen Xiaohua Jiang Yiu Wa Chung Alvin Chun Hang Ma Anskar Yu Hung Leung He Feng Huang Hsiao Chang Chan | 2012 | Cell Research2012，22，10： | 2 |
| 8 | Persistent organic pollutants in environment of the Pearl River Delta, China: an overview显示文摘 | Jiamo Fu Bixian Mai Guoying Sheng Gan Zhang Xinming Wang Ping’an Peng Xianming Xiao Rong Ran Fanzhong Cheng Xianzhi Peng Zhishi Wang U Wa Tang | 2003 | Chemosphere2003，，9： | 2 |
| 9 | Persistent organic pollutants in environment of the Pearl River Delta, China: an overview显示文摘 | Jiamo Fu Bixian Mai Guoying Sheng Gan Zhang Xinming Wang Ping’an Peng Xianming Xiao Rong Ran Fanzhong Cheng Xianzhi Peng Zhishi Wang U Wa Tang | 2003 | Chemosphere2003，，9： | 2 |
| 10 | In vivo expression of p53 and Bcl-2 and their role in programmerd cell death in premalignant and malignant lung lesions显示文摘 | Koty PP Zhang H Franklin WA | 2002 | Lung Cancer2002，35，2： | 1 |
| 11 | Detection of breast cancer with addition of annual screening ultrasound or a single screening MRI to mammography in women with elevated breast cancer risk显示文摘 | Berg WA Zhang Z Lehrer D | 2012 | JAMA2012，307，13： | 1 |
| 12 | Planning the Competitive City- Region:The Emergence of Strategic Development Plan in China 显示文摘 | Wa Fulong Zhang Jingxing | 2007 | Urban Affairs Review2007，42，5： | 1 |
| 13 | Stereoscopic image generation based on depth images for 3D TV 显示文摘 | Zhang Liang Tam Wa James | 2005 | IEEE Transactions on Broadcasting2005，51，2： | 1 |
| 14 | The influence of electro-acupuncture on neural plasticity in acute cerebral infarction 显示文摘 | Ren L Zhang WA Fang NY | 2008 | Neurol Res2008，30，9： | 1 |
| 15 | Human B lymphoblast cell lines defective of STAT6 Signaling produce high levels of proinflammatory cytokines IL-12,TNFα and IFNγ显示文摘 | Zhang WJ Koltun WA Thompson JF | | 0，，02： | 1 |
| 16 | Novel dual-rod screw for thoracoscopic anterior instrumentation:biomechanical evaluation compared with single-rod and double-screw/double-rod anterior constructs显示文摘 | Zhang H Sucato DJ Pierce WA | | 0，，1976： | 1 |
| 17 | The influence of electroacupuncture on neural plasticity in acute cerebral infarct-tion显示文摘 | Ren L Zhang WA Fang NY etal | 2008 | Neurol Res2008，30，9： | 1 |
| 18 | Bacille-Calmette Guerininduces caspase-independent cell death in urothelial carcinomacells together with release of the necrosis- associated chemo-kine high molecular group box protein 1显示文摘 | See WA Zhang G Chen F | 2009 | BJU Int2009，103，12： | 1 |
| 19 | Autophagy is involved in endoplasmic reticulum stress-induced cell death of rat hepatocytes显示文摘 | Zhang J Morris MW Jr Dorsett-Martin WA | 2013 | J Surg Res2013，183，2： | 1 |
| 20 | Biocorrosion behavior and cytotoxicity of a Mg-Gd-Zn-Zr alloy with long period stacking ordered structure 显示文摘 | Zhang X Wa Y Xue Y | 2012 | Materials Letters2012，86，： | 1 |
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