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A Study of Bispectra in Relation to the Adequacy of Wave Spectral Model

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China Ocean Engineering 1997年第2期12卷 171-186页

作者： kuo, yy Chien, CC Yim, JY NATL TAIWAN OCEAN UNIV DEPT HARBOR & RIVER ENGNCHILUNGTAIWAN

In this paper, the characteristics of laboratory wind waves under various wind speeds and water depths are studied. It is found that either the real or the imaginary part of the bispectrum can be related to the asymmetry of the wave profile, and the bicoherence is related to the ratio of nonlinear to linear wave component. Occasionally, these two categories of nonlinear index lead to opposite inferences, because each of them has its own significance and functions. The applicability of linear wave spectral model in ocean waves becomes questionable only when strong nonlinearity is indicated by both of these two indexes, The linear spectral representation of wave fields does not necessarily become inadequate as water depth decreases, and its appropriateness can be examined through the characteristics of the bispectrum.

关键词： bispectrum nonlinearity spectral form wave spectral model

THE THEOREMS ON THE B-B POLYNOMIALS DEFINED ON A SIMPLEX IN THE BLOSSOMING FORM

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Journal of Computational Mathematics 1996年第1期14卷 64-70页

作者： Feng, yy Kozak, J UNIV SCI & TECHNOL CHINA DEPT MATHHEFEI 230026PEOPLES R CHINA UNIV LJUBLJANA DEPT MATHLJUBLJANASLOVENIA

In this paper, an explicit expression of the blossom by the means of the B-form of B-B polynomial defined on a simplex is given. With its help, new but very short and simple blossom proofs of the most important theorems on B-B polynomials are derived, such as the degree elevation formula, the subdivision and the change of the underlying simplex procedure, the control points convergence property, the Marsden's identity.

关键词： THE THEOREMS ON THE B-B POLYNOMIALS DEFINED ON A SIMPLEX IN THE BLOSSOMING FORM Design CAD

Depsides from Prunella vulgaris

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Chinese Chemical Letters 2000年第11期11卷 997-1000页

作者： Wang, ZJ Zhao, yy Wang, B Al, TM Chen, yy Beijing Med Univ Dept Nat Med Beijing 100083 Peoples R China

A novel depsides 1, together with three known ones 2 similar to4 and two phenylpropanoids 5 similar to6 were isolated from the ethanol extract of the spikes of Prunella vulgaris. On the basis of spectral and chemical evidence. their structures were determined as butyl rosmarinate 1, ethyl rosmarinate 2. methyl rosmarinate 3, rosmarinic acid 4, 3,4,alpha -trihydroxy-methyl phenylpropionate 5 and p-coumaric acid 6, respectively.

关键词： MS acid Wang DMSO 亚砜 FAB

Treatment of Helicobactor pylori infection:analysis of Chinese clinical trials

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World Journal of Gastroenterology 2000年第3期6卷 324-325页

作者： Li yy Sha WH First Municipal Peoples Hosp Guangzhou Dept Gastroenterol Guangzhou 510180 Peoples R China

INTRODUCTION E radication of Helicobacter pylori(Hp)infection isgenerally not *** clinical regimens havebeen recommended in the *** theexperience from the other countries and the practicein China,Chinese doctors have tried *** this study,we collected and pooled thedata from Chinese literature to evaluate the effectof different regimens in Chinese patients infectedwith Hp.

关键词： Helicobacter infection/therapy clinical trials evaluating studies Helicobacter pylori

Species distribution of polymeric aluminium ferrum——timed complexation colorimetric analysis method of Al-Fe-Ferron

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Journal of Environmental Sciences 2001年第4期13卷 418-421页

作者： Hu, yy Tu, CQ Wu, HH S China Univ Technol Coll Paper & Environm Engn Guangzhou 510640 Peoples R China

The effects of the calorimetric buffer solutions were investigated while the two colorimetric reactions of AI-ferron complex and Fe-ferron complex occurred individually, and the effects of the testing wavelength and the pH of the solutions were also investigated. A timed complexatian colorimetric analysis method of Al-Fe-ferron in view of the total concentration of {AI + Fe} was then established to determine the species distribution of polymeric Al-Fe. The testing wavelength was recommended at 362 net and the testing pH value was 5. With a comparison of the ratios of n(Al)/n(Fe), the standard adsorption curves of the polymeric Al-Fe solutions were derived from the experimental results. Furthermore, the solutions' composition were carious in both the molar n(Al)/n(Fe) ratios, i.e. 0/0, 5/5, 9/1 and 0/10, and the concentrations associated with the total ( Al + Fe which ranged from 10(-5) to 10(-4) mol/L..

关键词： polymeric aluminum-ferrum species distribution timed complexation colarimetric analysis method Al-Fe-ferron

SYNTHESIS　OF　1H－1，2，4－TRIAZOLE－3－THIOL　RESIN　AND　ITS　SORPTION　BEHAVIOR　FOR　PLATINUM　AND　GOLD　IONS

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中国有色金属学会会刊：英文版 1996年第3期6卷 49-53页

作者： Chen, XQ Yuan, XZ Chen, yy CENT S UNIV TECHNOL DEPT CHEMCHANGSHA 410083PEOPLES R CHINA HUNAN UNIV INST EVIRONM PROTECTCHANGSHA 410082PEOPLES R CHINA HANGZHOU UNIV DEPT CHEMHANGZHOU 310028PEOPLES R CHINA

ＳＹＮＴＨＥＳＩＳＯＦ１Ｈ－１，２，４－ＴＲＩＡＺＯＬＥ－３－ＴＨＩＯＬＲＥＳＩＮＡＮＤＩＴＳＳＯＲＰＴＩＯＮＢＥＨＡＶＩＯＲＦＯＲＰＬＡＴＩＮＵＭＡＮＤＧＯＬＤＩＯＮＳ￥ＣｈｅｎＸｉａｏｑｉｎｇ（Ｄｅｐａｒｔｍｅｎ... 详细信息

ＳＹＮＴＨＥＳＩＳＯＦ１Ｈ－１，２，４－ＴＲＩＡＺＯＬＥ－３－ＴＨＩＯＬＲＥＳＩＮＡＮＤＩＴＳＳＯＲＰＴＩＯＮＢＥＨＡＶＩＯＲＦＯＲＰＬＡＴＩＮＵＭＡＮＤＧＯＬＤＩＯＮＳ￥ＣｈｅｎＸｉａｏｑｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｃｅｎｔ...

关键词： H-1 2 4-triazzole-3-thiol resin sorption gold platinum

AN ANALYSIS FOR IMPERFECT SENSITIVITY OF A SUPERCONDUCTING ROD

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Acta Mechanica Solida Sinica 1996年第3期9卷 236-245页

作者： Xiao, Y Zhu, yy LANZHOU UNIV DEPT MECHLANZHOU 730000PEOPLES R CHINA

On the basis of the interaction between the electromagnetic field and a solid, the imperfect sensitivity of a superconducting rod is studied in this paper. The influences of the initial deflection of the rod and the initial magnetic field on the stability are discussed. One can see that the bifurcation response of the rod with imperfections is similar to the universal unfolding of the fork bifurcation from the singularity theory.

关键词： magneto-elasticity superconducting rod imperfect sensitivity bifurcation figure

Dynamic Analysis and Numerical Simulation of a Kind of Arrestor Arresting Buckle Propagation by FEM

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China Ocean Engineering 1998年第3期13卷 323-332页

作者： Huang, yy Qian, Q Jin, T Huazhong Univ Sci & Technol Dept Mech Wuhan 430074 Peoples R China

For exact estimation of efficiency of a buckle arrestor, it is necessary to take the effect of structural inertia into account in the analysis of buckle propagation on elastic structures after meeting arrestors. Under this consideration, this paper deals with the dynamics of buckle arrest and its numerical simulation on the basis of the beam system model used by Chater and Hutchinson (1983). The FEM combined with an improving are-length control method is adopted to solve the dynamic equations describing the arresting of buckle propagation. A new group of parameters for arrestor design which differs greatly from that by the quasi-static analysis is obtained. The present results support the conclusion that the inertia of the beam cannot be neglected in such analysis.

关键词： buckle propagation arrestor beam nonlinear foundation finite element method

Computation of Design Load and Motion for Floating Structures Navigating in Waves

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China Ocean Engineering 1999年第1期14卷 93-100页

作者： Wang, yy Zhu, RC Miao, J Dalian Univ Technol Sch Naval Architecture & Marine Engn Dalian 116024 Peoples R China

Analytical and numerical investigation is made of the source potential for-floating structure with forward speed in waves. A particular form is selected for numerical applications, where the double integral of the Green function is transformed into the single one and the oscillation characteristics for integrands in the specific computation domain are treated numerically. A comparison of calculated examples with published data is given and it shows that the numerical simulation is satisfactory and the accuracy is adequate to engineering application.

关键词： floating structure Green function ship motion source distribution