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AN ITERATION METHOD FOR INCOMPRESSIBLEVISCOUS/INVISCID COUPLED PROBLEM VIA A SPECTRALAPPROXIMATION

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Journal of Computational mathematics 1999年第4期17卷 379-396页

作者： Chuan-jn Xu(department of mathematics, {2. University, xiamen 361005, China) 厦门大学数学系福建厦门 361005

An efficient iteration-by-subdomain method (known as the Schwarz alternating algorithm) for incompressible viscous/inviscid coupled model is presented. Appropriate spectral collocation approximations are proposed. The convergence analysis show that the iterative algorithms converge with a rate independent of the polynomial degree used.

关键词： coupled equations Navier-Stokes equations Euler equations cllocation approximation Schwarz alternating algorithm

An initial note on quasi- stationary, cold-core Lanyu eddies southeast off Taiwan Island

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Chinese Science Bulletin 2003年第19期48卷 2101-2107页

作者： JING Chunsheng1,2.& LI Li1 1. Third Institute of Oceanography, State Oceanic Administration, xiamen 361005, China 2. department of Oceanography, {2. University, xiamen 361005, China Third Institute of Oceanography State Oceanic Administration Xiamen China department of Oceanography Xiamen University Xiamen China

Drifting buoys, satellite altimetry and satellite-derived sea surface thermal images are used to identify the existence of a large cold-core, cyclonic Kuroshio frontal eddy between Hengchun Peninsula and Lanyu, southeast off Taiwan Island around March 1996. The cold eddy accompanies an offshore meander of the Kuroshio near Lanyu, about 70 km and 100 km in horizontal zonal and meridional scales, respectively. The cold eddy is different from normal Kuroshio frontal eddies for its persisting of about 2.months near Lanyu. Supporting evidence suggests that the Kuroshio intruded into the South China Sea (SCS, hereafter) forming a loop-like structure during the persisting period of the cold eddy and that similar eddies occur occasionally in the same location. Compared with the corresponding studies in the Gulf of Mexico, it is suggested that Lanyu cold eddies are SCS analogues of Tortugas eddies found in the southern Straits of Florida. Overshooting of the meandering Kuroshio when it leaves the SCS and effects from conservation of potential vorticity are the possible mechanism of eddy genesis.

关键词：台湾省黑潮暖流涡流寒潮飓风

Disequilibria between ^(2.0)Po and ^(2.0)Pb in surface waters of the southern South China Sea and their implications

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Science China Earth Sciences 2006年第1期49卷 103-112页

作者： YANG Weifeng, HUANG Yipu1,2. CHEN Min1,2. ZHANG Lei, LI Hongbin, LIU Guangshan1,2.& QIU Yusheng1,2.1. {4. of Oceanography, xiamen University,{2., China 2. State Key Laboratory of Marine Environmental Science, xiamen University,{2., China 1. department of Oceanography Xiamen University Xiamen 361005 China 2. State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

Activities of the naturally occurring radionuclides, ^(2.0)Pb and ^(2.0)Po,were measured in both dissolved ( 0.4. μm) phases from surfacewaters of the southern South China Sea. The average activity of particulate ^(... 详细信息

Activities of the naturally occurring radionuclides, ^(2.0)Pb and ^(2.0)Po,were measured in both dissolved ( 4. μm) and particulate ( > 0.4. μm) phases from surfacewaters of the southern South China Sea. The average activity of particulate ^(2.0)Pb, 0.2. Bq/m^3 (n= 2.), accounted for about 12. of the total ^(2.0)Pb, which corresponds with values of open *** ^(2.0)Po, with an average activity of 0.4. Bq/m^3, accounted for about 4.% of the total^(2.0)Po, which was much higher than those of open and eutrophic oceans. The residence times oftotal ^(2.0)Po and ^(2.0)Pb in surface waters estimated from an irreversible steady-state model were0.82.a and 1.16 a, respectively. The consistently high fractionation factor calculated either byscavenging rate constants (5.4.0} or K_d values (6.69) suggested that a significant fractionationoccurred between ^(2.0)Po and ^(2.0)Pb during their removal from solution to particles and that thetwo radionuclides had different biogeochemical cycling pathways in the oligotrophic South China ***, our results indicated that there exist different fractionation mechanisms between^(2.0)Po and ^(2.0)Pb in different marine environments: in eutrophic ocean, plankton detritus andfecal pellets are the main carrier of ^(2.0)Po and ^(2.0)Pb, by which ^(2.0)Po and ^(2.0)Pb havebeen scavenged and removed; while in oligotrophic ocean, microbes could become the main carrier of^(2.0)Po and fractionate ^(2.0)Po and ^(2.0)Pb significantly as a result of scarce plankton detritusand fecal pellets. These results suggest the use of ^(2.0)Po to trace marine biogeochemicalprocesses relating to microbial activities and the cycling of sulfur group elements (S, Se, Te andPo).

关键词： South China Sea, 2.0Po, 2.0Pb, disequilibria, scavenging.

Maximal possible accretion rates for slim disks

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Science China(Physics,Mechanics & Astronomy) 2009年第12期52卷 2054-2058页

作者： LIN YiQing1 & JIAO ChengLiang2.1 department of mathematics and Physics,{2. University of Technology,{2. 36102.,China 2.department of Physics and Institute of Theoretical Physics and Astrophysics,{2. University,{2. 361005,China 1. department of mathematics and Physics Xiamen University of Technology Xiamen 361024 China 2. department of Physics and Institute of Theoretical Physics and Astrophysics Xiamen University Xiamen 361005 China

It was proved in the previous work that there must be a maximal possible accretion rate $ \dot M_{max} $ for a slim disk. Here we discuss how the value of $ \dot M_{max} $ depends on the two fundamental parameters of the disk, namely the mass of the central black hole M and the viscosity parameter α. It is shown that $ \dot M_{max} $ increases with decreasing α, but is almost independent of M if $ \dot M_{max} $ is measured by the Eddington accretion rate $ \dot M_{Edd} $ , which is in turn proportional to M.

关键词： accretion disks black hole physics hydrodynamics

Reduced-glutathione concentrations in Boleophthalmus pectinirostris tissues exposed to benzo(a)pyrene

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Journal of Environmental Sciences 2001年第3期13卷 308-310页

作者： FENG Tao 1, ZHENG Wei yun 1, GUO Xiang\|qun\+2. ZHANG Yong\+1(1.Environmental Science Research Center, xiamen University, xiamen 361005, China 2.Chemistry {2., xiamen University, xiamen\ 361005, China) Environmental Science Research Center Xiamen University Xiamen 361005 China.

The concentrations of reduced-glutathione ( GSH) in liver and ovary of Boleophthalmus pectinirostris are quantified. The concentrations of GSH in the ovary are much higher than that of GSH in the liver(nearly 3 times of the liver). The study also investigates the changes of GSH contents in the two organs while the fishes were exposed to benzo(a)pyrene(BaP) at concentrations of 0, 0.05, 0.2.and 0.5 mg/L respectively for up to a week. The concentrations of GSH in the liver of BaP-exposed fish increased significantly with dose, whereas the concentrations of GSH in the ovary decreased significantly compared to controls. The results suggested that both the liver and the ovary are the primary organ in BaP metabolism, and that the changes of GSH levels may represent an adaptive response or toxic effect to Bap exposure.

关键词： Boleophthalmus pectinirostris benzo(a)pyrene reduced-glutathione

Some equalities and inequalities of g-continuous frames

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Science China mathematics 2010年第10期53卷 2621-2632页

作者： XIAO XiangChun & ZENG XiaoMing department of mathematics,{2. University,{2. {4.,China 1. department of mathematics Xiamen University Xiamen 361005 China

In this paper,we derive some equalities and inequalities about g-continuous frames,which are an extension to g-frames and continuous *** also discuss the stability of the perturbation of a g-continuous frame.

关键词： g-continuous frame Parseval g-continuous frame frame operator

Correlativity between neural complex and gonadal development in Styela plicata

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Chinese Science Bulletin 1997年第10期42卷 864-867页

作者： FANG Yongqiang, LIN Jiahan and HUANG Weiquan1. Third Institute of Oceanography, State Oceanic Administration, xiamen 361005, China 2. department of Biology, {2. U-niversity, xiamen 361005, China 3. Fourth Military Medical University, Xi’an 710032. China Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

IT has been demonstrated that two reproductive hormones,gonadotropin-releasing hormone(GnRH)and gonadotropin(GTH),exist in the nervous system and Hatschek’s pit oflancelet,a species of Cephalochordata,and that these ... 详细信息

关键词： Styela plicata neural complex reproductive hormone.

Studies on structure and function of digestive system of Cymatium pileare

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Acta Oceanologica Sinica 2001年第2期20卷 261-270页

作者： Zhou Yongcan, Zeng Shuixiang, Su Yongquan (1. Fishery department, Hainan University, Haikou 5702.8, China 2. Oceanology department, {2. University, xiamen 361005, China) Fishery department Hainan University Oceanology Department Haikou 570228 China

The digestive system of Cymatium pileare consists of buccal cavity, oesophagus, stom- ach, intestine, anus, salivary glands and liver. There is a contractible 'Argobuccinum' form proboscis in the anterior extremity of its body, and the buccal cavity lies in the anterior part of the proboscis, with a pair of jaws and a piece of radular ribbon. The jaws have many neatly arraned sickle- shaped sharpen denticles. Its dentition formula of radula is 2. (7) 1' (5-6) I (5-6) .1 (7) .2. In the middle of oesophagus, there is an expanded crop, which has the function of temporary food stor- age and preliminarily digesting food. The stomach is U-shaped and there are 2.entrances for liver ducts in its ventral side. The intestine is short and can be divided into 2.parts based on the structure of epithelia of their inner walls. The inner wall of foreintestine is stratified columnar epithelium, but the inner wall of hindintestine is pesudostratified columnar epithelium. The salivary gland of C. pileare is toxic gland and the toxin extracted from it plays a great role on its predation. The liver of C. pileare is compound tubuloacinar gland with mitochondrion, rough endoplasmic reticulum, Golgi comples and lysosome in its glandular cells.

关键词： Cymatium pileare, digestive system, structure function

Distribution characteristics of zooplankton in the south part of Taiwan Strait in summer

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Acta Oceanologica Sinica 2000年第1期19卷 127-135页

作者： Zhu Changshou Huang Jiaqi Lin Junzhou Du Qinghong Chen Xu Li Shaojing (1. Fujian Institute of Oceanology, xiamen 361012. China 2. department of Oceanography, xiamen University, xiamen 361005, China) Fujian Institute of Oceanology Xiamen 361012 China department of Oceanography Xiamen University Xiamen 361005 China

Based on the samples collected mesoplankton net from the south part Of Taiwan Strait (2.. 2. --2.. 65N, 117. 50 -- 12.. 00E) in August 1997, 2.2.species of zooplankton and 11 groups of meroplankton were identified. In the survey waters, Copepoda was dominant in either species or individual numbers. The diversity (H' ) was 5. 11 and the ratio of diversity to evenness (J ) was 7. 10, showing that the diversity of zooplankton was exceedingly high in the survey waters. Three zooplankton communities were clearly divided by systematical cluster analysis, indicating that the biotopes of these zooplankton communities may serve as the evidence for the basic status of distribution of water masses during the investigation.

关键词： Zooplankton species diversity distribution characteristics Taiwan Strait