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Preparation,Characterization and Visible Light Photocatalytic Activity of Nitrogen-doped TiO_2

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Journal of Wuhan university of Technology(Materials Science) 2006年第4期21卷 71-77页

作者：王正鹏 school of Environmental Science and engineering Shanghai Jiao Tong UniversityShanghai 200240China

The N-doped TiO2 polycrystalline powder was synthesized through calcining the hydrolysis prodact of tetra-butyl titanate with ammonia. The photocatalytic activity of N-doped TiO2 powder with anatase phone calcined at 400℃ was 2.7 times higher than that of Degussa P25 for phenol decomposition under visible light. All samples had mesoporoas structures. X- ray photoelectron spectroscopy confirmed that a trace amount of N atoms remained in the anatase polycrystaUine TiO2 powder when calcined at 400 ℃ as substitutional atoms at the oxygen sites. UV-Vis and EPR analyses indicated that oxygen vacancy states were created during the course of N-doped TiO2 powder formation. It is considered that substitutional N atoms, oxygen vacancy, states, large BET surface areas and mesoporoas structure are important facwrs for the N-doped photocatalyst to present a high vis-activity.

关键词： photocatalyst visible Light nitrogen-doped TiO2 phenol

AUTOMATIC STRESSES ACQUISITION AT HOT SPOT OF TUBULAR JOINTS IN THE OFFSHORE DRILLING PLATFORMS

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china Ocean engineering 1987年第2期1卷 33-39页

作者： Wei Yinan, Qi Feihu, Wang XiangdiZhang Liying Hu Cuixian (shanghai jiao tong university, shanghai) shanghai jiao tong Univ Shanghai China Shanghai Jiao Tong Univ Shanghai China

A new technique which combines the photoelastic testing with the digital image processing (DIP) technique is described in this paper, with which the photoelastic data are acquired, processed and analysed automatically. The technique has been employed to analyse the hot spot stresses of tubular K and T joints in offshore drilling platforms, and the results are satisfactory.

关键词： AUTOMATIC STRESSES ACQUISITION AT HOT SPOT OF TUBULAR JOINTS IN THE OFFSHORE DRILLING PLATFORMS AT SPOT

THE SIMULATION AND ANALYSIS OF TANK SLOSHING WITH POROSITY GIRDER BY MULTI-DOMAIN BOUNDARY ELEMENT METHOD

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Journal of Hydrodynamics 2010年第4期22卷 546-553页

作者： HE Zhao ZHU Ren-chuan MIAO Guo-ping school of Naval Architecture Ocean and Civil Engineering State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200240 China

The simulations of nonlinear sloshing in both two-dimensional and three-dimensional liquid tanks with porosity girder are carried out in time domain by using the Multi-domain Boundary Element Method（MBEM）.The comparison of the present results and the references is conducted and shows they agree well with each *** three-dimensional effect and the influence of the width of liquid tank and the height and porosity of the girder on the natural period of the model are also discussed.

关键词： Multi-domain Boundary Element Method (MBEM) sloshing girder with porosity time domain nonlinearity natural period three-dimensional effect

EFFECTS OF TEMPERATURE AND CONCENTRATION ON RHEO-LOGICAL CHARACTERISTICS OF SURFACTANT ADDITIVE SOLUTIONS

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Journal of Hydrodynamics 2008年第5期20卷 603-610页

作者： ZHANG Hong-xia WANG De-zhong GU Wei-guo CHEN Han-ping school of mechanical engineering Shanghai Jiao Tong University Shanghai 200240 China

The shear viscosity of turbulent drag-reducing surfactant solution was measured as a function of concentration, shear rate and temperature by using an AG-G2 rheometer （TA Instruments, New Castle, USA）. The experimental results showed complicated rheological behavior with the concentration in large. The Bird-Carreau model was found to fit well to the measured rheological results. The characteristics for the parameters ηo-ηx and λ dependence on temperature were also studied.

关键词： shear viscosity surfactant solution drag reduction Bird-Carreau model AR-G2 rheometer

A TIME DOMAIN INVESTIGATION ON THE HYDRODYNAMIC RESONANCE PHENOMENA OF 3-D MULTIPLE FLOATING STRUCTURES

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Journal of Hydrodynamics 2008年第5期20卷 611-616页

作者： ZHU Hai-rong ZHU Ren-chuan MIAO Guo-ping The State Key Laboratory of Ocean engineering School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai 200030 China

A 3-D time domain method is developed to investigate the gap influence on the wave threes for 3-D multiple floating structures. Special hydrodynamic resonance due to small gaps between multiple floating structures on wave forces is examined. Strong and complicate hydrodynamic interactions between the floating bodies are observed and the numerical computations have proved the existence of the sharp peak force response on each floating body at some special resonant wave numbers. By comparison with the results from the frequency domain technique, the results obtained from the time domain method reveal the similar resonant phenomena and hydrodynamic interaction. The resonant wave numbers are also proved around kL-nπ （n = 1,2 ……∞） with a corresponding frequency shift. The strong hydrodynamic interaction feature is practically significant for the design of module structures and the links （connection） in whole the floating body system.

关键词： time domain resonance hydrodynamic interaction multiple floating bodies gap influence

Asymmetric encryption and signature method with DNA technology

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Science china(Information Sciences) 2010年第3期53卷 506-514页

作者： LAI XueJia1, LU MingXin2, QIN Lei3, HAN JunSong4 & FANG XiWen11Department of Computer Science & engineering, shanghai jiao tong university, shanghai 200030, china 2school of National Information Security, Nanjing university, Nanjing 210093, china 3BIOCOMPLEX, 4915 Bathurst St. Unit# 209-366, ON M2R 1X9, Canada 4National engineering Center for BioChip at shanghai, shanghai 201203, china 1. Department of Computer Science & engineering Shanghai Jiao Tong University Shanghai 200030 China2. School of National Information Security Nanjing University Nanjing 210093 China3. BIOCOMPLEX 4915 Bathurst St. Unit# 209-366 Toronto ON M2R 1X9 Canada4. National Engineering Center for BioChip at Shanghai Shanghai 201203 China

This paper proposes DNA-PKC, an asymmetric encryption and signature cryptosystem by combining the technologies of genetic engineering and cryptology. It is an exploratory research of biological cryptology. Similar to conventional public-key cryptology, DNA-PKC uses two pairs of keys for encryption and signature, respectively. Using the public encryption key, everyone can send encrypted message to a specified user, only the owner of the private decryption key can decrypt the ciphertext and recover the message; in the signature scheme, the owner of the private signing key can generate a signature that can be verified by other users with the public verification key, but no else can forge the signature. DNA-PKC differs from the conventional cryptology in that the keys and the ciphertexts are all biological molecules. The security of DNA-PKC relies on diffcult biological problems instead of computational problems; thus DNA-PKC is immune from known attacks, especially the quantum computing based attacks.

关键词： cryptology asymmetric encryption digital signature biological cryptology DNA

Investigation of Internal Turret Mooring System for Oil Production Storage Vessels

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china Ocean engineering 1991年第4期6卷 395-408页

作者： Ma Zhiliang , Huang Xianglu , Ma Peisun Fan Genfa, Yu Xiangsan and Jin Dexian Professor, shanghai jiao tong university, shanghai Associate Professor, shanghai jiao tong university, shanghai Research Fellow, shanghai jiao tong university, shanghai

The internal turret mooring system for oil production storage vessels is a developing type ofoffshore floating production system suitable for deep water and harsh environmental application. In this paper, some achievements in our research work are presented. The description includes: dynamic analysis of mooring system, research on performance of turret assembly, influence of vessel dimensions and hull forms on mooring performance, model tests under combined action of environmental forces in basin, and hull structural strength analysis.

关键词： floating production system single point mooring turrent mooring system oil production storage vessel production storage unit

A NUMERICAL STUDY ON MECHANISM OF S-STARTS OF NORTHERN PIKE (ESOX LUCIUS)

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Journal of Hydrodynamics 2007年第2期19卷 135-142页

作者： HU Wen-rong tong Bing-gang LIU Hao Department of engineering Mechanics Shanghai Jiaotong University Shanghai 200240 China Laboratory for Biomechanics of Animal Locomotion Graduate University of the Chinese Academy of Sciences Beijing 100039 China Laboratory for Biomechanics of Animal Locomotion Graduate University of the Chinese Academy otSciences Beijing 100039 China Department of Electronics and mechanical engineering Chiba University Japan

Northern pike is regarded as a specialist in swimming acceleration. The force production mechanism of northern pike, Esox lucius, during its predation S-starts was numerically studied in this article. The problem was reasonably simplified to a loose-coupling problem of fish swimming dynamics and hydrodynamics just in the swimming direction. The approach involved the simulation of the flow by solving the two-dimensional unsteady incompressible Navier-Stokes equations and decribing the fish motion dynamics based on Newton＇s Second Law. Visualizations of flow fields and vortex structures were performed. The results show that the large acceleration is obtained mainly in the first undulatory cycle in which the amplitude increases. In the second cycle, a couple of vortices are generated and induce a jet. In the third cycle, the jet is strengthened by the mergence of the vortices in the same direction. Through discussing the effects of various controllable factors on the swimming performance, it is found that the actual locomotion mode of the northern pike in nature is just the best choice.

关键词： S-starts of fish swimming Navier-Stokesequations mechanism of force production

A novel control scheme of 230kA DC power source using thyristor, Phase-shifting rectifier transformer and On-load tap changer

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A novel control scheme of 230kA DC power source using thyris...