检索结果-南通市图书馆

Sea level variations in the South china Sea inferred from satellite gravity,altimetry,and oceanographic data

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china Earth sciences 2012年第10期55卷 1696-1701页

作者： FENG Wei 1,2,ZHONG Min 1,3 & XU HouZe 1,3 1 State Key Laboratory of Geodesy and Earth’s Dynamics,institute of Geodesy and geophysics,Chinese Academy of sciences,wuhan 430077,china 2 Graduate university of Chinese Academy of sciences,Beijing 100049,china 3.institute of geophysics,huazhong university of science and technology,wuhan 430074,china State Key Laboratory of Geodesy and Earth’s Dynamics Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan China Graduate university of Chinese Academy of sciences Beijing China institute of geophysics Huazhong University of Science and Technology Wuhan China

Sea level variations(SLVs) can be divided into two major components:the steric SLV and the mass-induced *** two components of SLV in the South china Sea(SCS) are studied by using satellite altimetry,GRACE(Gravity Recovery and Climate Experiment) satellite gravity,and oceanographic data on annual and inter-annual *** the annual timescale,the geographic distribution of mass-induced SLV's amplitude jointly estimated from altimetry and the ECCO(Estimation of the Circulation and Climate of the Ocean) model agrees very well with that from *** observes obvious seasonal mass-induced SLV in the SCS with annual amplitude of 2.7±0.4 cm,which is consistent with the annual amplitude of 2.7±0.3 cm estimated from the steric-corrected *** the inter-annual timescales,the mean SLV in the SCS shows a large oscillation,which is mainly caused by the steric *** trend of mean SLV inferred from altimetry in the SCS is 5.5±0.7 mm/yr for the period of 1993-2009,which is significantly higher than the global sea level rise rate of 3.3±0.4 mm/yr in the same *** is no obvious trend signal in the mass-induced SLV detected from GRACE that indicates the water exchange between the SCS and its adjacent seas and land is in balance within the study period.

关键词： altimetry GRACE ECCO the South china Sea sea level variation

The characteristics of arc beam shaping in hybrid plasma and laser deposition manufacturing

在线全文

学校读者我要写书评

暂无评论

science china(Technological sciences) 2006年第2期49卷 238-247页

作者： ZHANG Hai’ou1, QIAN Yingping1,3, WANG Guilan1 & ZHENG Qiguang2 1. School of Material science and technology, huazhong university of science and technology, wuhan 430074, china 2. institute of Laser technology and Engineering, huazhong university of science and technology, wuhan 430074, china 3. Mechanical Engineering College, Hubei university of technology, wuhan 430068, china School of Material science and technology Huazhong University of Science and Technology Wuhan China Mechanical Engineering College Hubei University of Technology Wuhan China institute of Laser technology and Engineering Huazhong University of Science and Technology Wuhan China

As a new direct metal prototyping technology,the hybrid plasma and laser deposition manufacturing (PLDM) is proposed in this paper. In order to figure out the characteristics of plasma arc beam and mould in the PLDM process of high temperature alloy, the high speed CCD camera is used to obtain the picture around the plasma arc. Afterwards the sketch of picture is clearly obtained. And the effect of laser parameter, such as average power, pulse width, pulse repetition frequency and the angle between laser beam and plasma arc beam on the plasma arc appearance, is studied experimentally. The results show that the modality of plasma arc beam is markedly influenced by laser beam. And the improvements of shape precision and surface state of the layer deposited by PLDM are confirmed.

关键词： plasma hybrid laser, direct deposition, plasma arc beam, molding character, high-temperature alloy.

PARALLEL LATTICE BGK SIMULATION OF NATURAL CONVECTION IN A CAVITY

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2005年第5期17卷 564-570页

作者： SHI Bao-chang LIU Hong-juan Parallel Computing institute Huazhong University of Science and Technology Wuhan 430074 China Department of Mathematics Huazhong University of Science and Technology Wuhan 430074 China

A Coupled Lattice Bhatnagar Gross Krook （CLBGK） model was proposed with a robust boundary scheme to model the Bossinesq incompressible flows. The LBGK method is a powerful approach, but is also computationally demanding. Therefore, parallel computing was implemented, and the codes were run on the parallel computer “Lenovo DeepComp 1800” with 24 nodes written in C＋＋ using the Message Passing Interface （MPI） library. Numerical results for natural convection in a cavity with the Rayleigh number （ Ra ） ranging from 10^6 to 4× 10^10 were presented, and found to agree well with the previous work. And with the increase of the resolution rate, the accuracy has been greatly improved. In addition, new models were set up by applying different equilibriums to the CLBGK model to simulate the same problem, which all yield sound results.

关键词： Lattice Bhatnagar Gross-Krook ( LB( K )model, Lattice Boltzmann Method (LBM), natural convection, parallel computing, high resolution

Spiral waves in CIMA model and its LBGK simulation

在线全文

学校读者我要写书评

暂无评论

Communications in Nonlinear science and Numerical Simulation 2001年第2期6卷 68-73页

作者： Qing LI, Chuguang ZHENG and Nengchao WANG College of Computer science and technology, huazhong university of science and technology, wuhan 430074, china e-mail: qingli @ public. *** State Key Laboratory of Coal Combustion, huazhong university College of Computer science and technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China Parallel Computation institute Huazhong University of Science and Technology Wuhan 430074 China

Two type of structures-Turing patterns and spiral waves-are obtained in chloride-iodide-malonic acid (CIMA) reaction-diffusion model by using lattice Bhatnagar-Gross-Krook (LBGK) method.

关键词： lattice Boltzmann method reaction-diffusion Turing patterns spiral waves

Ti(C, N) BASED CERAMETS AND ITS FRACTAL ANALYSIS OF FRACTURE SURFACES

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1996年第2期6卷 101-104页

作者： Liu Ning(Department of Materials science and Engineering,Anhui institute of technology, Hefei 230069)Hu Zhenhua Cui Kun(huazhong university of science and technology, wuhan 430074) Department of Materials science and Engineering Anhui Institute of Technology Hefei 230069 China huazhong university of science and technology Wuhan 430074 China

Ｔｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＡＭＥＴＳＡＮＤＩＴＳＦＲＡＣＴＡＬＡＮＡＬＹＳＩＳＯＦＦＲＡＣＴＵＲＥＳＵＲＦＡＣＥＳＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎ... 详细信息

Ｔｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＡＭＥＴＳＡＮＤＩＴＳＦＲＡＣＴＡＬＡＮＡＬＹＳＩＳＯＦＦＲＡＣＴＵＲＥＳＵＲＦＡＣＥＳＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，Ａｎｈｕｉｉｎｓｔｉｔｕｔｅｏ...

关键词： Ti(C, N) based ceramets fracture surface fractal analysis

Residue Phe266 in S5-S6 loop is not critical for Charybdotoxin binding to Ca2+-activated K~+(mSlo1)channels

在线全文

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2006年第7期27卷 945-949页

作者： Jmg YAO~2 Hui LI~2 Ge-liang GAN Ying WU Jiu-ping DING~3.institute of Biochemistry and Biophysics,College of Life science and technology,huazhong university of science and technology,wuhan 430074,china institute of Biochemistry and Biophysics College of Life Science and Technology Huazhong University of Science and Technology Wuhan China

Aim:To gain insight into the interaction between the Charybdotoxin(ChTX)andBK ***:Site-directed mutagenesis was used to make two mutants:mSlol-F266L and *** two mutants were then expressed in Xeno-pus oocytes and their effects were tested on ChTX by ***:We demonstrate an equilibrium dissociation constant Kd=3.1—4.2 nmol/L for both the mutants mSlol-F266L and mSlol-F266A similar to thatof the wild-type mSlol Kd=3.9 nmol/***:The residue Phe266 does notplay a crucial role in binding to ChTX,which is opposed to the result arising fromthe simulation of peptide-channel interaction.

关键词： charybdotoxin large-conductance calciumactivated potassium channelss Slo1

CAD/CAE OF THE WORKING CHARACTERISTICS OF A NEW TYPE OF FLUID COUPLING SHOCK ABSORBER

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2002年第3期15卷 222-227页

作者： Yang Ping Zhong Yifang Zhou JiSchool of Mechanical science and Engineering, huazhong university of science and technology,wuhan 430074, chinaLiu Yong Guilin institute of Electronic technology School of Mechanical science and Engineering Huazhong University of Science and Technology Wuhan 430074

For purpose of simulation of the working characteristics of a new type offluid coupling shock absorber for vibration protection of sensitive equipment, a physical model ispresented by analyzing the internal fluid dynamic phenomenon with respect to the coupling shockabsorber and implemented in MATLAB software package. Using the model it is possible to evaluate theimportance of different factors for design of the shock absorber. In the meantime, the key-modelmachine is designed for coupling dynamic test. Comparisons with experimental results confirm thevalidity of the model. So the CAD/CAE software has been developed in MATLAB for design andexperimental test of the new coupling shock absorber.

关键词： Fluid coupling shock absorber Working characteristics Model Simulation

HALF-SPACE GREENS'S FUNCTION DUE TO A SPATIALLY HARMONIC LINE LOAD AND SCATTERED FIELDS IN THE FAR FIELD REGION

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 1997年第1期10卷 56-65页

作者： Peng Zhu(Changsha Communication institute.Changsha 4110076.china)Li Zailiang(huazhong university of science and technology.wuhan 430074,china) Changsha Communication institute Changsha 410076 China huazhong Univ. of Sci. and Technol. Wuhan 430074 China

Half-space Green's function due to a spatially harmonic line load has been expressed as a sum of the full-space Green's functions and a 2-D integral representation of the reflected waves by the free surface of the *** using the obtained half-space Green's function,an integral rep- resentation of the scattered waves by a cylindrical obstacle is then ***,by analyzing the far-zone behavior of the integrands of the integral *** far-field pattern of the scattered waves in a half-space obtained.

关键词： spatially harmonic line load half-space Green's function far-field of scattered waves

Ca^(2+) signals induced from calcium stores in pancreatic islet β cells

在线全文

学校读者我要写书评

暂无评论

Chinese science Bulletin 2000年第1期45卷 51-56页

作者： ZENG Xuhui, QU Anlian, LOU Xuelin, XU Jianhua, WANG Junjian, WU Hongxiu & ZHOU Zhuan1. institute of Biochemistry and Biophysics, huazhong university of science and technology, wuhan 430074, china 2. Pharmacology, huazhong university of science and technology, wuhan 430074, china 3. School of Life sciences, university of science and technology of china, Hefei 230027, china Correspondence should be addressed to Zhou Zhuan. institute of Biochemistry and Biophysics Huazhong University of Science and Technology Wuhan China Pharmacology Huazhong University of Science and Technology Wuhan China School of Life sciences University of Science and Technology of China Hefei China

In single rat pancreatic βcells, using fura-2 microfluorometry to measure [Ca2+] response upon different stimuli, the ways of calcium regulation have been studied. When the extracellular calcium concentration was 2.5 mmol/L, either 60 mmol/L KCI, 20 mmol/L D-glucose or 0.1 mmol/L tolbutamide induced increase in [Ca2+]. Such increase in [Ca2+] was absent when the same stimuli were applied under zero extracellular calcium. These results indicate that the increase of [Ca2+] is induced by the activation of voltage-dependent calcium channels in p celis. The manifold forms of [Ca2+] change induced by glucose imply that the effects of glucose are complex. 5 mmol/L caffeine or 5 mmol/L MCh increase the [Ca2+], which is independent of the external calcium, suggesting that [Ca2+] can be regulated by Ca2+ release from not only the IP3-sensitive but also the ryanodine sensitive calcium stores in p celis. The latency of Ca responses for IP3 pathway (5 s) is faster than that for ryanodine pathway (30 s), it is

关键词： pancreatic β cell [Ca2+]i calcium stores glucose fura-2.