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Evaluation of SIFOM-FVCOM system for high-fidelity simulation of small-scale coastal ocean flows

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Journal of hydrodynamics 2016年第6期28卷 994-1002页

作者： k.QU h.S.tang A.AGRAWAL C.B.JIANG B.DENG Department of Civil Engineering City College City University of New York School of hydraulic Engineering Changsha University of Sciences and Technology

This paper evaluates the SIFOM-FVCOM system recently developed by the authors to simulate multiphysics coastal ocean flow phenomena, especially those at small scales. First, its formulation for buoyancy is examined with regard to solution accu- racy and computational efficiency. Then, the system is used to track particles in circulations in the Jamaica Bay, demonstrating that large-scale patterns of trajectories of fluid particles are sensitive to small-scales flows from which they are released. Finally, a simulation is presented to illustrate the SIFOM-FVCOM system＇s capability, which is beyond the reach of other existing models, to directly and simultaneously model large-scale storm surges as well as small-scale flow structures around bridge piers within the hudson River during the hurricane Sandy.

关键词： coastal ocean flow multiscale multiphysics hybrid method domain decomposition SIFOM-FVCOM system

腹板密布横向加劲肋的板梁的破坏特性试验研究

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国外桥梁 1987年第4期 49-54页

作者： h.R.Evans k.h.tang 党志杰

本文叙述了为研究梁的破坏方式和腹板横向加劲的特性而在大比例尺板梁模型上进行的五个试验。试验结果表明,拉力场机构法能较准确地预估这种腹板密布加劲肋的梁的极限承载能力。试验结果还表明,现在提出的腹板横向加劲肋的设计方法是安... 详细信息

本文叙述了为研究梁的破坏方式和腹板横向加劲的特性而在大比例尺板梁模型上进行的五个试验。试验结果表明,拉力场机构法能较准确地预估这种腹板密布加劲肋的梁的极限承载能力。试验结果还表明,现在提出的腹板横向加劲肋的设计方法是安全的,但也是保守的。

关键词：加劲肋极限承载能力板块测量值轴向荷载肋(机械) 断块腹板高度破坏荷载拉力场板梁

Induced Pluripotent Stem Cell-derived Mesenchymal Stem Cell Seeding on Biofunctionalized Calcium Phosphate Cements

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Bone Research 2013年第4期1卷 371-384页

作者： WahWah Theinhan Jun Liu Minghui tang Wenchuan Chen Linzhao Cheng hockin h.k.Xu Biomaterials & Tissue Engineering Division Department of EndodonticsProsthodontics and Operative DentistryUniversity of Maryland Dental School State key Laboratory of Oral Diseases West China Hospital of StomatologySichuan University Stem Cell Program in Institute for Cell Engineering and Division of hematology Johns Hopkins University Center for Stem Cell Biology & Regenerative Medicine University of Maryland School of Medicine University of Maryland Marlene and Stewart Greenebaum Cancer Center University of Maryland School of Medicine Department of Mechanical Engineering University of Maryland

Induced pluripotent stem ceils （iPSCs） have great potential due to their proliferation and differentiation capability. The objectives of this study were to generate iPSC-derived mesenchymal stem cells （iPSC-MSCs）, and investigate iPSC-MSC proliferation and osteogenic differentiation on calcium phosphate cement （CPC） containing biofunctional agents for the first time. human iPSCs were derived from marrow CD34＋ cells which were reprogrammed by a single episomal vector, iPSCs were cultured to form embryoid bodies （EBs）, and MSCs migrated out of EBs. Five biofunctional agents were incorporated into CPC： RGD （Arg-Gly-Asp） peptides, fibronectin （Fn）, fibronectin-like engineered polymer protein （FEPP）, extracellular matrix Geltrex, and platelet concentrate, iPSC-MSCs were seeded on five biofunctionalized CPCs： CPC-RGD, CPC-Fn, CPC- FEPP, CPC-Geltrex, and CPC-Platelets. iPSC-MSCs on biofunctional CPCs had enhanced proliferation, actin fiber expression, osteogenic differentiation and mineralization, compared to control. Cell proliferation was greatly increased on biofunctional CPCs. iPSC-MSCs underwent osteogenic differentiation with increased alkaline phosphatase, Runx2 and coUagen-I expressions. Mineral synthesis by iPSC-MSCs on CPC-Platelets was 3-fold that of CPC control. In conclusion, iPSCs showed high potential for bone engineering, iPSC- MSCs on biofunctionalized CPCs had cell proliferation and bone mineralization that were much better than traditional CPC. iPSC-MSC-CPC constructs are promising to promote bone regeneration in craniofacial/ orthopedic repairs.

关键词： induced pluripotent stem cells RGD fibronectin platelet concentrate biofunctionalized calciumphosphate cement bone tissue engineering

Femtosecond Degenerate Four-Wave-Mixing in ZnO Microcrystallite Thin Films

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Chinese Physics Letters 1999年第6期16卷 418-419页

作者： ZhANG Wei-li WANG Qing-yue ChAI Lu XING Qi-rong k.S.Wong h.Wang Z.k.tang G.k.L.Wong R.Jain Ultrafast Laser Laboratory School of Precision Instruments&Optoelectronics Engineeringand Optoelectronic Information Science and Technology LaboratoryTianjin UniversityTianjin 300072 School of Science Tianjin UniversityTianjin 300072 Department of Physics Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong Center for high Technology Materials University of New Mexico1313 Goddard SEAlbuquerqueNM 87106USA

Transient third-order optical nonlinearityχ^(3)of ZnO microcrystallite thin films is measured at various temperatures by using femtosecond degenerate ***-temperature excitonic enhancement of is *** magnitude ofχ^(3)ranges between 10^(-4)to 10^(-6)esu from 4.2k to room *** measuredχ^(3)response time ranging from 200 to 300 fs ultrafast for temperature down to 4.2k.

关键词： temperature. crystallite nonlinearity

A Requirements Analysis Model Based on QFD

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Journal of Electronic Science and Technology of China 2004年第4期2卷 87-92页

作者： Nelson k.h. tang Operation and Information Management Group Aston Business School Aston University Birmingham B4 7ET United Kingdom

The enterprise resource planning (ERP) system has emerged to offer an integrated IT solution and more and more enterprises are increasing by adopting this system and regarding it as an important innovation. however, there is already evidence of high failure risks in ERP project implementation, one major reason is poor analysis of the requirements for system implementation. In this paper, the importance of requirements analysis for ERP project implementation is highlighted, and a requirements analysis model by applying quality function deployment (QFD) is presented, which will support to conduct requirements analysis for ERP project.

关键词： ERP requirements analysis model QFD BSC VCA

The effect of downstream resistance on flow diverter treatment of a cerebral aneurysm at a bifurcation: A joint computational-experimental study

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Journal of hydrodynamics 2018年第5期30卷 803-814页

作者： ANDerson C.O.Tsang Billy Y.S.Yiu Abraham Y.S.tang W.C.Chung Gilberto k.k.Leung AlexANDer k.k.Poon Alfred C.h.Yu Simon S.M.Lai k.W.Chow Department of Surgery Li Ka Shing Faculty of Medicine University of Hong Kong Department of Electrical and Computer Engineering University of Waterloo Department of Mechanical Engineering University of Hong Kong Department of Electrical and Electronic Engineering University of Hong Kong

Intracranial aneurysm can lead to hemorrhagic stroke upon rupture. Deployment of flow diverters can restrict the blood flow into aneurysm and mitigate the rupture risk. Computational fluid dynamics（CFD） and ultrasonography with pulse-wave and color Doppler ultrasound measurements were employed jointly to investigate the complex flow pattern in cerebral aneurysms, both before and after the deployment of flow diverters. Patient-specific configurations of both bifurcation and side-wall aneurysms were selected. The effect of downstream flow resistance was investigated by adjusting the volume flow rate and pressure at the outlet vessels computationally and experimentally. Velocity profiles in the aneurysm measured from ultrasonography showed good agreement with those from computer simulations. The discrepancy in velocity between the computational and experimental sets of data is less than 10%. The downstream resistance can alter the volume flux into a bifurcation aneurysm with a flow diverter deployed by 236%, while the corresponding value of a side-wall aneurysm is negligible. The vorticity of the aneurysmal flow was reduced by more than 80% in both cases after stenting. This study demonstrated that careful investigation of downstream flow resistance of a bifurcation aneurysm is essential to provide an accurate assessment of the aneurysmal flow dynamics after flow diverter deployment.

关键词： Intracranial aneurysms computational fluid dynamics (CFD) doppler ultrasound

hierarchical sodium-rich Prussian blue hollow nanospheres as high-performance cathode for sodium-ion batteries

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Nano Research 2018年第8期11卷 3979-3990页

作者： Xiao tang hao Liu Dawei Su Peter h. L. Notten Guoxiu wang Center for Clean Energy Technology Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia Department of Chemical Engineering and Chemistry Eindhoven University of Technology Eindhoven 5600 MB The Netherlands Fundamental Electrochemistry (IEkg) Forschungszentrum Julich Julich D-52425 Germany

Recently, Prussian blue and its analogues （PBAs） have attracted tremendous attention as cathode materials for sodium-ion batteries because of their good cycling performance, low cost, and environmental friendliness. however, they still suffer from kinetic problems associated with the solid-state diffusion of sodium ions during charge and discharge processes, which leads to low specific capacity and poor rate performances. In this work, novel sodium iron hexacyanoferrate nanospheres with a hierarchical hollow architecture have been fabricated as cathode material for sodium-ion batteries by a facile template method. Due to the unique hollow sphere morpholog~ sodium iron hexacyanoferrate nanospheres can provide large numbers of active sites and high diffusion dynamics for sodium ions, thus delivering a high specific capacity （142 mAh/g）, a superior rate capabili, and an excellent cycling stability. Furthermore, the sodium insertion/extraction mechanism has been studied by in situ X-ray diffraction, which provides further insight into the crystal structure change of the sodium iron hexacyanoferrate nanosphere cathode material during charge and discharge processes.

关键词： sodium-rich sodium ironhexacyanoferrate hollow nanospheres cathode sodium-ion batteries

Nucleic acid-based diagnostics for infectious diseases in public health affairs

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Frontiers of Medicine 2012年第2期6卷 173-186页

作者： Albert Cheung-hoi Yu Greg Vatcher Xin Yue Yan Dong Mao hua Li Patrick h.k.Tam Parker Y.L.Tsang April k.Y.Wong Michael h.k.hui Bin Yang hao tang Lok-Ting Lau Neuroscience Research Institute/Department of Neurobiology School of Basic Medical Sciences/Key Laboratory for NeuroscienceMinistry of Education/Key Laboratory for NeuroscienceMinistry of HealthPeking UniversityBeijing 100191China hai kang Life Corporation Limited Hong Kong SARChina and Beijing 100176China

Infectious diseases,mostly caused by bacteria and viruses but also a result of fungal and parasitic infection,have been one of the most important public health concerns throughout human *** first step in combating these pathogens is to get a timely and accurate diagnosis at an affordable *** kinds of diagnostics have been developed,such as pathogen culture,biochemical tests and serological tests,to help detect and fight against the causative agents of ***,these diagnostic tests are generally unsatisfactory because they are not particularly sensitive and specific and are unable to deliver speedy *** acid-based diagnostics,detecting pathogens through the identification of their genomic sequences,have shown promise to overcome the above limitations and become more widely adopted in clinical *** we review some of the most popular nucleic acid-based diagnostics and focus on their adaptability and applicability to routine clinical *** also compare and contrast the characteristics of different types of nucleic acid-based diagnostics.

关键词： nucleic acid-based diagnostics infectious disease PCR NASBA LAMP microarray LOAC public health affairs

Fekete-Szeg Problems for Certain Classes of Meromorphic Functions Using q-Derivative Operator

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Journal of Mathematical Research with Applications 2018年第3期38卷 236-246页

作者： huo tang h.M.ZAYED A.O.MOSTAFA M.k.AOUF School of Mathematics and Statistics Chifeng University Department of Mathematics Faculty of Science Menofia University Department of Mathematics Faculty of Science Mansoura University

In this paper, we introduce two subclasses Σ*q(φ) and Σ*q,α(φ) of meromorphic functions f(z) for whichqz Dq f(z)f(z)? φ(z) and

关键词： analytic function meromorphic function Fekete-Szeg problem q-derivative operator q-Bessel function