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Rational Form Solitary Wave Solutions and Doubly Periodic Wave Solutions to (1+1)-Dimensional Dispersive Long Wave Equation

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Communications in Theoretical physics 2005年第6期43卷 975-982页

作者： WANG Qi CHEN Yong ZHANG Hong-Qing department of Applied Mathematics, Dalian university of Technology, Dalian 11602..{2. department of Mathematics, Ningbo university, Ningbo 3152.1,{2. department of physics, shanghai Jiao Tong university, shanghai 2.0030,{2. department of Applied Mathematics Dalian University of Technology department of Mathematics Ningbo University department of physics Shanghai Jiao Tong University

In this work we devise an algebraic method to uniformly construct rational form solitary wave solutionsand Jacobi and Weierstrass doubly periodic wave solutions of physical interest for nonlinear evolution equations. Withthe aid of symbolic computation, we apply the proposed method to solving the (1+1)-dimensional dispersive long wavethe (1+1)-dmensional dispesive long wavedelliptic donbly periodc wave solutions as special cases.

关键词： elliptic equation rational expansion method rational form solitary wave solutions rational form Jacobi and Weierstrass doubly periodic wave solutions symbolic computation (1+1)-dimensional dispersive long wave equation

EXPERIMENTAL INVESTIGATION ON VORTEX BREAKDOWN IN SPIN-UP AND SPIN-DOWN PROCESSES VIA PIV

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Journal of Hydrodynamics 2003年第2期15卷 58-63页

作者： LiuYing-zheng KoyamaHideS. ChenHan-ping departmentofPowerMachineryEngineering ShanghaiJiaotongUniversityShanghai200030China departmentofMechanicalEngineering TokyoDenkiUniversityTokyo101-8457Japan

The whole field measurements of swirling flow in spin-up and spin-downprocesses via PIV are presented in the paper. Investigation of the flow patterns at H/R = 1. 50 wasexperimentally carried out for the first time in both processes. By means of symmetry analysis, itis found that the overall flow structure in the spin-up process still keep axi-symmetric to a greatextent, but deteriorated very fast in the spin-down process. The time to settle to the state of restin the spin-down process is found to be greatly shorter than the time to achieve the steady statein the spin-up process. Temporarily oscillatory vortex breakdown was discovered during the spin-upprocess, although no breakdown in the steady state at the same Reynolds number is found in preciousresearches.

关键词： vortex breakdown PIV swirling flow

On Sequential Composition of Precise Zero-Knowledge

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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

Effect of Solute Drag and Precipitate Pinning on Austenite Grain Growth in Ti-Nb Microalloyed Steels

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Journal of Iron and Steel Research International 2011年第S1期18卷 383-387页

作者： FU Li-ming 1,WANG Huan-rong 2.WANG Wei 2.SHAN Ai-dang 1 (1.School of Materials Science and Engineering,shanghai jiaotong {2.,shanghai 2.02.0,china 2.department of Structural Steels,Baosteel Research Institute,shanghai 2.1900,china) shanghai Jiao Tong Univ Sch Mat Sci & Engn Shanghai 200240 Peoples R China Baosteel Res Inst Dept Struct Steels Shanghai 201900 Peoples R China

A metallurgical model concerning the co-effect of the Nb solute drag and the complex carbonitride precipitates pinning is proposed to predict the recrystallization austenite grain growth of low carbon Nb-containing microalloyed *** analysis,both predicted and experimental,reveals the precipitate pinning plays a dominate role in suppressing the austenite grain growth with less Nb solute drag effect in high temperature region whereas the Nb solute drag predominates in relatively low temperature region.A factor p is suggested to assess the effectiveness of drag and *** pinning and the drag are more effective in restraining grain growth as p>0 and p<0,respectively.A low carbon Nb microalloyed steel and a kind of Ti-modified low carbon Nb steel by Ti substituting for part of Nb are employed to validate the modeling *** theoretical calculations show a good agreement with experimental results.

关键词： grain growth precipitates pinning solute drag Ti-Nb microalloyed steels

Methylation profiling of twenty four genes and the concordant methylation behaviours of nineteen genes that may contribute to hepatocellular carcinogenesis

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Cell Research 2003年第5期13卷 319-333页

作者： JIAN YU, HONG Yu ZHANG ZHEN ZHONG MA, WEI LU, YI FEI WANG, JINGDE ZHU The State-Key Laboratory for Oncogenes and Related Genes, shanghai Cancer Institute, shanghai jiaotong university, LN 2.00/2., Xietu Road, shanghai 2.0032. china E-mail: zhujingde@*** 2.4} of Mathematics, shanghai university, No. 99, Shangda Road, shanghai 2.0436, china 1The State-Key Laboratory for Oncogenes and Related Genes Shanghai Cancer Institute Shanghai Jiaotong University LN 2200/25 Xietu Road Shanghai 200032 China E-mail: zhujingde@*** 1The State-Key Laboratory for Oncogenes and Related Genes Shanghai Cancer Institute Shanghai Jiaotong University LN 2200/25 Xietu Road Shanghai 200032 China E-mail: zhujingde@*** 1The State-Key Laboratory for Oncogenes and Related Genes Shanghai Cancer Institute Shanghai Jiaotong University LN 2200/25 Xietu Road Shanghai 200032 China E-mail: zhujingde@*** 2.0} of Mathematics Shanghai University No. 99 Shangda Road Shanghai 200436 China 2.0} of Mathematics Shanghai University No. 99 Shangda Road Shanghai 200436 China 1The State-Key Laboratory for Oncogenes and Related Genes Shanghai Cancer Institute Shanghai Jiaotong University LN 2200/25 Xietu Road Shanghai 200032 China E-mail: zhujingde@***

To determine the possible role of the epigenetic mechanisms in carcinogenesis of the hepatocellular carcinoma, we methylation-profiled the promoter CpG islands of twenty four genes both in HCC tumors and the neighboring non-cancerous tissues of twenty eight patients using the methylation-specific PCR （MSP） method in conjunction with the DNA sequencing. In comparison with the normal liver tissues from the healthy donors, it was found that while remained unmethylated the ABL, CAV, EPO, GATA3, LKB1, NEP, NFL, NIS and p2.KIP1 genes, varying extents of the HCC specific hypermethylation were found associated with the ABO, AR, CSPG2. cyclin al, DBCCR1, GALR2. IRF7, MGMT, MT1A, MYOD1, OCT6, p57KIP2. p73, WT1 genes, and demethylation with the MAGEA1 gene, respectively. Judged by whether the hypermethylated occurred in HCC more frequently than in their neighboring normal tissues, the hypermethylation status of the AR, DBCCR1, IRF7, OCT6, and p73 genes was considered as the event specific to the late stage,

关键词： promoter CpG island methylation specific PCR concordant behaviors of methylation.

Identification and Characterization of a Rat Novel Gene RSEP4 Expressed Specifically in Central Nervous System

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Acta Biochimica et Biophysica Sinica 2004年第7期36卷 501-507页

作者： Xi-Dao WANG1,2. Ling-Wei KONG1, Zhi-Qin XIE1, Yu-Qiu ZHANG3, Zhi-Xin LIN2. Zhi-Qi ZHAO3,Lei YU4, and Nai-He JING1* 1 Laboratory of Molecular Cell Biology, Laboratory of Stem Cell Biology, Institute of Biochemistry and Cell Biology, shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, shanghai 2.0031,{2. School of Life Science and Biotechnology, 2. shanghai jiaotong university, shanghai 2.0030,{2. Institute of Neurobiology, Fudan university, shanghai 2.0433,{2. 3 4 department of Cell Biology, Neurobiology and Anatomy, College of Medicine, university of Cincinnati, Cincinnati, Ohio, USA Laboratory of Molecular Cell Biology and Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences Shanghai China

The low-abundantly expressed genes composed the majorities of the mRNAs expressed in the central nervous system (CNS), and were thought to be important for the normal brain functions. Through differential screening a low-abundance cDNA sublibrary with mRNA from neuropathic pain of chronic constriction injury (CCI) model, we have identified a novel rat gene, rat spinal-cord expression protein 4 gene (RSEP4). The total length of RSEP4 cDNA is 2.06 bp, with a 501 nucleotide open reading frame (ORF) that encodes a 167 amino acid polypeptide. Northern blot revealed that RSEP4 was expressed specifically in the CNS. In situ hybridization showed that the mRNA of RSEP4 was strongly expressed in the CA1, CA2. CA3 and DG regions of hippocampus, the Purkinje cells of cerebellum, and the small sensory neurons of dorsal horn and large motor neurons of ventral horn of spinal cord. Over-expression of RSEP4-EGFP fusion protein in the human embryonic kidney 2.3T cells showed that RSEP4 protein was mainly localized in the cell cytoplasm. These results suggest that RSEP4 may play some roles in the CNS.

关键词： central nervous system (CNS) rat Northern blot in situ hybridization

Characteristics of fMRI BOLD signal and its neurophysiological mechanism

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Progress in Natural Science:Materials International 2007年第6期17卷 630-638页

作者： Zhao Xiaohu1,2. Wu Yigen3 and Guo Shengli3(1. College of Life Sciences, Zhejiang university, Hangzhou 310058, china 2. Imaging {2. of Tongji Hospital of Tongji university, shanghai 2.0065, china 3. College of Mathematics and physics, Nanjing university of Information Science and Technology, Nanjing 2.0044, china) College of Life Sciences Zhejiang University Hangzhou 310058 China Imaging department Tongji Hospital Tongji University Shanghai 200065 China College of Mathematics and physics Nanjing University of Information Science and Technology Nanjing 210044 China

The functional magnetic resonance imaging (fMRI) based on blood oxygen level dependent (BOLD) contrast has emerged as one of the most potent noninvasive tools for mapping brain function and has been widely used to explore physiological, pathological changes and mental activity in the brain. Exploring the nature and property of BOLD signal has recently attracted more attentions. Despite that great progress has been made in investigation of the characteristics and neurophysiological basis, the exact nature of BOLD signal remains unclear. In this paper we discuss the characteristics of BOLD signals, the nonlinear BOLD response to external stimuli and the relation between BOLD signals and neural electrophysiological recordings. Furthermore, we develop our new opinions regarding nonlinear BOLD response and make some perspectives on future study.

关键词： functional magnetic resonance imaging blood oxygen level dependent nonlinear response neural electrophysiological activity.

THEORETICAL CALCULATION OF POINT DEFECTS IN Ni_3Al

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Acta Metallurgica Sinica(English Letters) 1993年第5期6卷 332-336页

作者： SUN Jian LIN Dongliang shanghai jiaotong university,shanghai,{2. LIN Dongliang,professor,department of Materials Science,shanghai jiaotong university,shanghai 2.0030,{2.

Equilibrium equation of point defects in Ll_2.type intermetallic compounds was established to calculate the relations of the concentration of antisite defects and vacancies and bulk composi- tion in Ni_*** examination of temperature effects on the point defects cleared up the mis. understanding of the properties of the“constitutional point defects”in Ni_3Al.

关键词： intermetallic compound Ni_3Al vacancy antisite defect

Design and Analysis of Ways to Improve System MTTF on Massive Storage Clusters

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微计算机信息 2007年第22期 181-183+180页

作者： CHEN YAN XU GUOZHI (EE department,shanghai {2. university,shanghai 2.02.0,china)

Nowadays clusters have been widely deployed as platforms for massive data storage. For applications with high reliability requirement,how to improve system MTTF is one of the key problems. This paper proposes a new dynamic replication scheme,called "concurrent data replication". Through extensive theoretical analysis,it shows that this scheme can improve system MTTF significantly,and the results are further proved by simulation. Additionally,this paper also gives key design techniques.

关键词： massive storage cluster MTTF