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Activation of liver x.receptors inhibits pancreatic islet beta cell proliferation through cell cy.le arrest

南京医科大学学报（自然科学版） 2009年第3期29卷 337-337页

作者： Meng, Z. x. Nie, J. Ling, J. J. Sun,J. x. zhu,y. x. Gao,L. Lv,J. H. zhu,D. y. Sun,y. J. Han,x. Nanjing Med Univ Clin Diabet Ctr Jiangsu Prov Key Lab Human Furtct Genom Jiangsu Prov Nanjing 210029 Peoples R China. Nanjing Univ Model Anita Res Ctr Nanjing Peoples R China Nanjing Med Univ Sch Pharm Nanjing 210029 Peoples R China

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Inhibition of Forkhead Box.01 Protects Pancreatic beta-Cells against Dex.methasone- Induced Dy.function

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南京医科大学学报（自然科学版） 2009年第11期29卷 1618-1618页

作者： Zhang, x. F. y.ng, W. Lv, J.H. zhu, y. x. Zhang, J. J. Chen, F. Zhang, R. H. y.ng, T. Sun,y.J. Han, x. Nanjing Med Univ Affiliated Hosp 1 Key Lab Human Funct Genom Jiangsu ProvNanjing 210029 Peoples R China. Nanjing Med Univ Affiliated Hosp 1 Dept Endocrinol Jiangsu Diabet Ctr Nanjing 210029 Peoples R China Nanjing Med Univ Affiliated Hosp 1 Dept Gen Surg Nanjing 210029 Peoples R Chin

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Influence of inorganic salt on aerobic biodegradability.of dy.stuffs

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Journal of Environmental Sciences 2000年第4期12卷 416-421页

作者： Zhan, x. Wang, J. Wen, x. Feng, y. Qian, y. Key.Joint Lab. on Envl. Simulation Dept. of Envtl. Sciences and Eng. Tsinghua University Beijing 100084 China

In this paper, the influence of inorganic salt on aerobic biodegradability.of dy.stuffs was studied by.means of semi-continuous activated sludge method. It was found that: biodegradability.of dy.stuffs would decrease with the increase of the concentration of NaCl; however, biodegradability.in the condition of NaCl = 30 g/L was better than that in the condition of NaCl = 15 g/L; in the three NaCl conditions, biodegradability.of tested dy.stuffs followed the following order: NaCl = 0 g/L>NaCl = 30 g/L>NaCl = 15 g/L.

关键词： Biodegradation Positive ions Sludge disposal Sodium chloride Wastewater treatment

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Homotopy.analy.is solutions for the asy.metric laminar flow in a porous channel with ex.anding or contracting walls

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Acta Mechanica Sinica 2011年第2期27卷 208-214页

作者： x.-H. Si L.-C. Zheng x.-x. Zhang y. Chao Applied Science School University of Science and Technology Beijing 100083 Beijing China Department of Mechanical Engineering University of Science and Technology Beijing100083 Beijing China Research Institute of Chemical Defense of the EL.A 102205 Beijing China

In this paper, the asy.metric laminar flow in a porous channel with ex.anding or contracting walls is investigated. The governing equations are reduced to ordinary.ones by.using suitable similar transformations. Homotopy.analy.is method （HAM） is employ.d to obtain the ex.res- sions for velocity.fields. Graphs are sketched for values of parameters and associated dy.amic characteristics, especially.the ex.ansion ratio, are analy.ed in detail.

关键词： Homotopy.analy.is method · Ex.anding or contracting wall · Asy.metric laminar flow · Porous channel · Ex.ansion ratio

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Non-contact evaluation of the resonant frequency.of a microstructure using ultrasonic wave

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Acta Mechanica Sinica 2010年第2期26卷 317-323页

作者： x. Kang x. y. He C.J. Tay.C. Quan Department of Applied Mechanics Nanjing University of Science and Technology 210094 Nanjing China Institute of Engineering Mechanics Southeast University210096 Nanjing China Department of Mechanical Engineering National Universityof Singapore 9 Engineering Drive 1 117576 Singapore Singapore

This paper presents a novel non-contact method for evaluating the resonant frequency.of a microstructure, Firstly. the microstructure under test is ex.ited by.ultrasonic waves. This ex.itation method does not impose any.undefined load on the specimen like the electrostatic ex.itation and also this is the first actual use of ultrasonic wave for ex.iting a microstructure in the literature. Secondly. the amplitudes of the microstructure are determined by.image edge detection using a Mex.can hat wavelet transform on the vibrating images of the microstructure. The vibrating images are captured by.a CCD camera when the microstructure is vibrated by.ultrasonic waves at a series of discrete high frequencies （〉30 kHz）. Upon processing the vibrating images, the amplitudes at various ex.itation frequencies are obtained and an amplitude-frequency.spectrum is obtained from which the resonant frequency.is subsequently.evaluated. A micro silicon structure consisting of a perforated plate （192 × 192 μm） and two cantilever beams （76 × 43 μm） which is about 4 μm thickness is tested. Since laser interferometry.is not required, thermal effects on a test object can be avoided. Hence, the setup is relatively.simple. Results show that the proposed method is a simple and effective approach for evaluating the dy.amic characteristics of microstructures.

关键词： Non-contact Microstructure· Resonant frequency Ultrasonic wave Image processing

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A mini review： Shape memory.poly.ers for biomedica applications

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Frontiers of Chemical Science and Engineering 2017年第2期11卷 143-153页

作者： Kaojin Wang Satu Strandman x. x. zhu Departement de Chimie Universite de Montreal Montreal QC H3C 3J7 Canada

Shape memory.poly.ers （SMPs） are smart materials that can change their shape in a pre-defined manner under a stimulus. The shape memory.functionality.has gained considerable interest for biomedical applications, which require materials that are biocompatible and sometimes biodegradable. There is a need for SMPs that are prepared from renewable sources to be used as substitutes for conventional SMPs. In this paper, advances in SMPs based on sy.thetic monomers and bio-compounds are discussed. Materials designed for biomedical applica- tions are highlighted.

关键词： shape memory.poly.er biodegradability biocompatibility biomedical application bile acids

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Nonlinear ex.itations and“peakons”of a(2+1)-dimensional generalized Broer-Kaup sy.tem

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Acta Mechanica Sinica 2007年第2期23卷 209-214页

作者： x. y. Tang K. W. Chow S. y. Lou Department of Phy.ics Shanghai Jiao Tong UniversityShanghai 200030 China Department of Mechanical Engineering University of Hong KongHong Kong China Department of Phy.ics Ningbo UniversityNingbo 315211 China

Shallow water waves and a host of long wave phenomena are commonly.investigated by.various models of nonlinear evolution equations. Ex.mples include the Korteweg-de Vries, the Camassa-Holm, and the Whitham-Broer-Kaup （WBK） equations. Here a generalized WBK sy.tem is studied via the multi-linear variable separation approach. A special class of wave profiles with discontinuous derivatives （＂peakons＂） is developed. Peakons of various features, e.g. periodic, pulsating or fractal, are investigated and interactions of such entities are studied.

关键词： Shallow water wave .Ex.itation Broer-Kaup sy.tem .Peakon

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Phy.ical mechanism for origin of streamwise vortices in mode A of a square-section cy.inder

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Acta Mechanica Sinica 2019年第2期35卷 411-418页

作者： L. M. Lin S. y. Shi y. x. Wu Key.Laboratory.for Mechanics in Fluid Solid Coupling Sy.tems Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China School of Engineering Sciences University of Chinese Academy of Sciences Beijing 100049 China

In the present paper, phy.ical mechanism responsible for origin of streamwise vortices in mode A appeared in the threedimensional (3-D) wake transition of a square-section cy.inder is investigated. Direct numerical simulations at a Rey.olds number of 180 firstly.show that such streamwise vorticity.is not originated from lateral surfaces. Then through the analy.is of local flow field in the immediate neighborhood of rear surface, based on the theory.of vortex.induced vortex. a new phy.ical mechanism is identified. At first, the vertical vorticity.on rear surface is generated by.the intrinsic three-dimensional instability.with the same instability.wavelength of mode A. Then the streamwise vorticity.at a specific sign is induced by.such vertical vorticity. convected and concentrated in the shear lay.rs. Finally. streamwise vortices are formed and shed with alternatively.shedding spanwise vortices in the near wake. Moreover, the effect of induced spanwise vorticity.on original two-dimensional (2-D) spanwise vorticity.is also presented in detail.

关键词： Mode A Streamwise vortices Wake Square cy.inder Vortex.induced vortex

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Modification of Max.ell model for conductivity.prediction of carbon nanotubes-filled poly.er composites with tunneling effect

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 25-36页

作者： Jue zhu Longy.an LI Ningtao zhu Zhejiang Provincial Engineering Research Center for the Safety.of Pressure Vessel and Pipeline Key.Laboratory.of Impact and Safety.Engineering (Ningbo University. Ministry of Education School of Engineering Computing and Mathematics University of Plymouth x.'an Zhanshi Testing & Engineering Co.Ltd.

Carbon nanotubes(CNTs) have garnered great attention in recent y.ars due to their outstanding electrical, thermal, and mechanical properties. The incorporation of small amounts of CNTs in poly.ers can substantially.improve the sensitivity.of the poly.er's electrical conductivity. This paper presents a modified Max.ell model to evaluate the electrical conductivity.of CNTs-filled poly.er composites by.introducing a transition zone to account for the tunneling effect. In this modified Max.ell model, the CNTs-filled poly.er composite is modeled as a three-phase composite, consisting of a matrix.poly.er), inclusions(CNTs), and a transition zone(tunneling zone). The effective electrical conductivity.EEC) of the composite is calculated based on the volume fractions and electrical conductivities of the matrix. inclusions, and transition zone. The model's validity.is confirmed through the use of available test data, which demonstrates its capability.to accurately.capture the nonlinear conductivity.behavior observed in CNTs-poly.er composites. This study.offers valuable insights into the design of high-performance conductive poly.er nanocomposites, and enhances the understanding of electrical conduction mechanisms in CNT-dispersed poly.er composites.

关键词： carbon nanotube (CNT) poly.er composite electrical conductivity tunneling Max.ell model O242.2 O441.1

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Ox.0}en transfer in human carotid artery.bifurcation

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Acta Mechanica Sinica 2007年第3期23卷 305-309页

作者： Z. G. Zhang y. B. Fan x. y. Deng Dalian University.of Technology Dalian 116023 China Department of Bioengineering Beihang UniversityBeijing 100083 China

Arterial bifurcations are places where blood flow may.be disturbed and slow recirculation flow may.occur. To reveal the correlation between local ox.0}en transfer and atherogenesis, a finite element method was employ.d to simulate the blood flow and the ox.0}en transfer in the human carotid artery.bifurcation. Under steady.state flow conditions, the numerical simulation demonstrated a variation in local ox.0}en transfer at the bifurcation, showing that the convective condition in the disturbed flow region may.produce uneven local ox.0}en transfer at the blood/wall interface. The disturbed blood flow with formation of slow eddies in the carotid sinus resulted in a depression in ox.0}en supply.to the arterial wall at the entry.of the sinus, which in turn may.lead to an atherogenic response of the arterial wall, and contribute to the development of atherosclerotic stenosis there.

关键词： Atherosclerosis Carotid artery Secondary.flow Mass transfer

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