检索结果-南通市图书馆

Impact analysis of natural disasters using interrelation of infrastructure and associated industries

在线全文

学校读者我要写书评

暂无评论

Journal of shanghai university(English Edition) 2010年第6期14卷 424-429页

作者：王增忠 MARK Hastak College of civil engineering Shanghai Normal University department of Construction engineering and Management Purdue University

Most serious natural disasters cause fatalities and injuries, and result in infrastructure damage, economic impacts, and social effects. With respect to the nature of impacts, it is important to understand the direct and indirect impacts of natural disasters on infrastructure and industries. In this paper, a holistic disaster impact analysis framework is presented to support more understanding of natural disaster events with respect to inter-relation of infrastructure and associated industries. Disaster impact mechanism and inter-relations based on critical function of industries derived from the extensive literature review and case studies. To develop the framework, service factor is chosen to measure the level of inter-relations and proper weights for each inter-relation between infrastructure and associated industries are obtained by surveying experts in the area of disaster mitigation, emergency organizations, and infrastructure management. This paper focuses on the impact analysis of hurricane disaster and the outcome can also be applied to other types of disasters.

关键词： disaster impact inter-relation infrastructure industry

ANALYTIC SOLUTION FOR WAVE DIFFRACTION OF A SUBMERGED HOLLOW SPHERE WITH AN OPENING HOLE

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2010年第3期22卷 295-304页

作者： DONG Man-sheng MIAO Guo-ping ZHU Ren-chuan, FAN Ju State Key Laboratory of Ocean engineering Shanghai Jiao Tong University Shanghai 200030 China School of civil engineering Hefei University of Technology Hefei 230009 China State Key Laboratory of Ocean engineering Shanghai Jiao Tong University Shanghai 200030 China

An investigation is carried out on the interaction of surface waves with a submerged sphere having an opening hole in finite-depth water in this article. Based on the linear wave theory, the method of multipole expansions is used to obtain the fluid velocity potential in the form of double series of the associated Legendre functions with the unknown coefficients of an infinite set. In terms of the body surface boundary condition and the matching condition between the inner and outer flows at the hole, the complex matrix equations for the coefficients of the series are established. The infinite sets of matrix equations are solved by truncating the series at a finite number. The hydrodynamic pressure on the structure surface and the exciting forces acting on the structure are graphically presented. The dynamic pressure on the wave front surface of the sphere varies slightly with angle of opening hole increasing, while that on the wave back surface does obviously. When the angles of opening hole are increasing, the absolute values of the complex exciting forces tend to fall as a whole.

关键词： diffraction surface waves submerged sphere multipole potential

On Sequential Composition of Precise Zero-Knowledge

在线全文

学校读者我要写书评

暂无评论

Journal of shanghai Jiaotong university(Science) 2010年第1期15卷 43-48页

作者：丁宁谷大武 department of Computer Science and engineering Shanghai Jiaotong University

Precise zero-knowledge was introduced by Micali and Pass in STOC'*** notion captures the idea that the view of any verifier in interaction can be reconstructed in almost *** also obtained a sequential composition lemma for precise zero-knowledge ***,this lemma doesn't provide tight precisions for composed *** this paper we further obtain a sequential composition lemma for a subclass of precise zero-knowledge protocols,which all satisfy a property:their simulators use the code of verifier in almost the black-box *** call such subclass emulated black-box zero-knowledge *** lemma provides better precisions for sequential composition of such protocols.

关键词： cryptography zero-knowledge precise zero-knowledge

Sulfonic Acid Modified Hollow Silica Spheres and Its Application in Proton Exchange Membranes

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan university of Technology(Materials Science) 2011年第5期26卷 837-842页

作者：朱敏袁俊杰 School of Materials Science and engineering Tongji University Key Laboratory of Advanced civil engineering Materials Minstry of EduationTongji University

In order to improve the proton conductivity of hollow silica spheres （HSS）/perfluorosulfonic acid ion-exchange （PFSA） composite membranes as proton exchange membrane,sulfonic acid groups were grafted onto the surfaces of HSS via post grafting *** images and FT-IR spectra of the obtained sulfonic acid groups modified hollow silica spheres （SAMHSS） illustrated that the sulfonic acid groups were successfully grafted onto the surfaces of *** uptake and swelling degree of SAMHSS/PFSA composite membranes were found much higher than those of HSS/PFSA membranes due to the introduction of hydrophilic sulfonic acid *** a range from 50 ℃ to 130 ℃,the highest conductivity of composite membranes was obtained when 5 wt% SAMHSS was *** maximum conductivity reached 7.5×10-2.S·cm-1 at 100 ℃ and 100% relative humidity,even the temperature increased to 130 ℃,the conductivity of composite membranes with 5 wt% SAMHSS could reach 3.7×10-2.S·cm-1 at 100 % relative humidity,while the conductivity of the recast PFSA was only 2.2.10-3 S·cm-1.

关键词： composite hollow silica spheres proton exchange membrane sulfonation conductivity

Periods and Energy Dissipations of a Novel TLD Rectangular Tank with Angle-adjustable Baffles

在线全文

学校读者我要写书评

暂无评论

Journal of shanghai Jiaotong university(Science) 2008年第2期13卷 139-144页

作者：尚春雨赵金城 department of civil {2. Shanghai Jiaotong University

A novel tuned liquid damper (TLD) rectangular tank with two angle-adjustable baffles was pre- *** numerical analysis was performed using the commercial code *** standard kinetic energy and dissipation rate turbulent model was employed,which was solved using volume of fluid (VOF) method able to treat both the free surface motion and the viscous stresses over the rigid walls *** relationship between the natural periods of water and the angles of its baffles was studied by numerical sim- ulating of a case,and the changes of energy dissipations were *** natural periods and dampers of the novel TLD can be changed in a wide range by adjusting the baffles' angle,thus it is more effective in controlling the vibration of structures in a wide frequency range.

关键词： tuned liquid damper angle-adjustable baffle turbulent eddies energy dissipation

Amphiphilic dendronized homopolymers

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2010年第12期53卷 2509-2519页

作者： LI Wen 1 & ZHANG AFang 1,2.1 Institute of Polymers,department of Materials,ETH Zurich,Wolfgang-Pauli-Str.10,8093 Zurich,Switzerland 2.department of Polymer Materials,College of Materials Science and {2.,shanghai university,shanghai 2.1800,china 1. Institute of Polymers Department of Materials ETH Zurich Wolfgang-Pauli-Str. 10 8093 Zurich Switzerland2. Department of Polymer Materials College of Materials Science and Engineering Shanghai University Shanghai 201800 China

A series of second generation of amphiphilic dendronized homopolymers are efficiently synthesized,and their thermoresponsiveness in aqueous solutions and secondary structures in methanol solutions are *** polymers are constructed in each repeat unit with various generations of hydrophobic 4-aminoproline and hydrophilic oligoethylene glycol (OEG)-based dendrons,and their over-all hydrophilicity is tuned by varying these dendron *** with or without the first generation of proline dendron show good water solubility at room temperature,but exhibit typical thermoresponsive behaviors at elevated temperatures as characterized by turbidity measurements using UV-vis spectroscopy,while the polymer with the secondary generation of proline dendron is not soluble in *** polymers show ordered secondary structures as evidenced by the optical rotation and circular dichroism ***,assembly of these amphiphilic homopolymers into porous films via breath figure (BF) technique is described,and polymer structures are found to show significant influence on the morphology of porous film.

关键词： amphiphilic polymer dendronized polymer dendritic macromolecule supramolecular structure

Tracheal compliance and limit flow rate changes in a murine model of asthma

在线全文

学校读者我要写书评

暂无评论

Science china(Life Sciences) 2008年第10期51卷 922-931页

作者： TENG ZhongZhao1, WANG YiQin2. LI FuFeng2. YAN HaiXia2.& LIU ZhaoRong3 1 department of Mathematical Sciences, Worcester Polytechnic Institute, Worcester, MA, 01609, USA 2.Syndrome Laboratory of TCM, shanghai university of Traditional Chinese Medicine, {2. 2.12.3, china 3 department of Mechanics and engineering Science, Fudan university, {2. 2.0433, china 1. department of Mathematical Sciences Worcester Polytechnic Institute Worcester MA 01609 USA 2. Syndrome Laboratory of TCM Shanghai University of Traditional Chinese Medicine Shanghai 201203 China 3. department of Mechanics and engineering Science Fudan University Shanghai 200433 China

Trachea is the unique passage for air to flow in and out. Its tone is of importance for the respiration system. However, investigation on how tracheal tone changes due to asthma is limited. Aiming at studying how the mechanical property changes due to asthma as well as the compliance and flow limitation, the following methods are adopted. Static and passive pressure-volume tests of rats' trachea of the asthmatic and control groups are carried out and a new type of tube law is formulated to fit the experimental data, based on which changes of compliance and limit flow rate are investigated. In order to give explanation to such changes, histological examinations with tracheal soft tissues are made. The results show that compliance, limit flow rate and material constants included in the tube law largely depend on the longitudinal stretching ratio. Compared with the control group, the tracheal compliance of asthmatic animals decreases significantly, which results in an increased limit flow rate. Histological studies indicate that asthma can lead to hyperplasia/hypertrophy of smooth muscle cells, and increase elastin and collagen fibres in the muscular membrane. Though decreasing compliance increases sta- bility, during the onset of asthma, limit flow rate is much smaller due to the lower transmural pressure. Asthma leads to a stiffer trachea and the obtained results reveal some aspects relevant to asthma-induced tracheal remodelling.

关键词： trachea asthma collapse tube law compliance limit flow rate remodelling

Modeling of multi-inclusion composites with interfacial imperfections:Micromechanical and numerical simulations

在线全文

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2010年第3期53卷 720-730页

作者： CHEN WeiQiu 1,ZHU XingYi 2.&HUANG ZhiYi 2.1 department of engineering Mechanics,Yuquan Campus,Zhejiang {2.,Hangzhou 31002.,china 2.Key Laboratory of Soft Soils and Geoenvironmental engineering,Ministry of Education department of civil engineering,Zijingang Campus,Zhejiang {2.,Hangzhou 310058,china 1. department of engineering Mechanics Yuquan Campus Zhejiang University Hangzhou 310027 China2. Key Laboratory of Soft Soils and Geoenvironmental Engineering Ministry of Education Hangzhou 310058 China3. Department of Civil Engineering Zijingang Campus Zhejiang University Hangzhou 310058 China

A micromechanical approach based on a two-layer built-in model and a numerical simulation based on boundary element method are proposed to predict the effective properties of the multi-inclusion composite with imperfect *** spring model is introduced to simulate the interface *** two methods are compared with each other,and good agreement is *** effects of interface spring stiffness,volume ratio and stiffness of inclusions on the micro-and macro-mechanical behaviors of fiber-reinforced composites are *** is shown that the developed micromechanical method is very comprehensive and efficient for fast prediction of effective properties of composites,while the numerical method is very accurate in detailed modeling of the mechanical behavior of composites with multiple inclusions.

关键词： micromechanics boundary element method interface multi-inclusion composite effective elastic property

CERAMIC MATRIX COMPOSITE SYNTHESIZED BY THE PURE Al+NaOH SELF-OXIDATION

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2001年第4期14卷 296-302页

作者： S.X. He1), S. Yuan2., J. Wang1) and B.D. Sun1) 1) department of Marterials Science and engineering, {2. Jiao Tong university, {2. 2.0030, china 2. department of Marterials Science and Engineerin Dept. of Mat. Sci. Shanghai Jiaotong Univ. Shanghai 200030 China

An Al2.3 ceramic matrix composite was fabricated by self-oxidation of pure Al+NaOH, and its microstructure, mechanical properties and growth mechanism were analyzed. Experimental results show that the composite possesses better mechanical properties, higher density and faster growth velocity than that made of Al-Mg-Si alloy. The composite grows primarily along the crucible wall and its microstructure is characterized by a periodic wavy like structure.

关键词： Aluminum Caustic soda Oxidation Synthesis (chemical)