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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, xiamen university, xiamen 3.1005, 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

Fate of particle-reactive pollutants in the xiamen Bay

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Acta Oceanologica Sinica 1998年第4期17卷 503-508页

作者： Chen Min and Huang Yipu (department of oceanography, xiamen university, xiamen 3.1005, china) department of oceanography Xiamen University Xiamen 361005 China

A simple model is established to describe the fate of particle-reactive pollutants in the xiamen Bay. Based on the conditional distribution coefficients (Kd ) of chemicals and residence times of particle and waters, the model can be used to predict the fractions of pollutants which would be scavenged to sediments and would escape from the system. The model is calibrated using scavenging data derived from 234 Th - 238U disequilibrium. The fate of a potential pollutant which will be scavenged is a function of the properties of the chemical, of the particle dynamics, and of the waters dynamics in the environment. It is inappropriate to overlook any factor.

关键词： Pollutant, ^(234)Th/^(238)U disequilibrium model prediction

Immunocytological evidence for the presence of vertebrate FSH and LH-like substances in the brain and thoracic ganglion of the swimming crab,Portunus trituberculatus

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Progress in Natural Science:Materials International 2008年第11期18卷 1453-1457页

作者： Huiyang Huang Haihui Ye Shaojing Li Guizhong Wang department of oceanography,xiamen university,xiamen 3.1005,china department of oceanography Xiamen University Xiamen 361005 China

Investigating the distribution of follicle stimulating hormone(FSH)and luteinizing hormone(LH)in the swimming crab, Portunus trituberculatus,helps in the understanding of its reproductive regulation *** study has detected the location of vertebrate FSH-and LH-like substances in the brain and the thoracic ganglion mass with immunocytochemical *** immunoreaction is very weak or negative during the immature period and the post-spawning period,while it is stronger in the mature *** of FSH-like immunoreactive cells resembles that of LH-like *** immunoreactive cells were observed chiefly in the anterior median cell-cluster of the protocerebrum with stronger *** were only a few in the inboard cell-cluster of the olfactory lobe of the deutocerebrum and the posterior cell-cluster of the *** cells were located in all the three ganglia in the thoracic ganglion *** results indicated that substances resembling the vertebrate FSH and LH exist in ***,and their expression has some correlation with the developmental stage of ovaries,thus they might engage in the ovary development and ovulation.

关键词： Follicle stimulating hormone(FSH) Luteinizing hormone(LH) Portunus trituberculatus Brain Thoracic ganglion mass Immunocytochemistry

Immunorecognition of estrogen and androgen receptors in the brain and thoracic ganglion mass of mud crab,Scylla paramamosain

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Progress in Natural Science:Materials International 2008年第6期18卷 691-695页

作者： Haihui Ye*,Huiyang Huang,Shaojing Li,Guizhong Wang department of oceanography,xiamen university,xiamen 3.1005,china department of oceanography Xiamen University Xiamen 361005 China

The brain and the thoracic ganglion of a crustacean can synthesize and secrete gonad-stimulating hormone(GSH)which stimulates the maturation of *** the previous experiments,sex steroid hormones(estradiol,testosterone,progesterone,etc.)have been detected from the ***,the feedback regulation of sex steroid hormones on the brain and the thoracic ganglion of the crustacean has not been reported so *** the present experiment,monoclonal antibodies were applied to investigate the immuno-recognition of estrogen receptor(ER)and androgen receptor(AR)in the brain and the thoracic ganglion mass of Scylla *** results showed that the distribution of the immunopositive substances of ER and AR was extremely *** distributed in the protocerebrum,deutocerebrum and tritocerebrum of the brain,and mainly in *** the thoracic ganglion mass,immuno-positive substances distributed in the subesophageal ganglion,thoracic ganglion and abdominal ganglion,and mostly in subesophageal *** substances of ER and AR mostly existed in the cytoplasm of *** present study will provide mor-phological evidence for the origin and the evolution of ER and *** addition,the immunoreactivities of ER and AR suggested that the estrogen and androgen may be involved in the feedback regulation of crustacean neuroendocrine.

关键词： Scylla paramamosain Estrogen receptor Androgen receptor Brain Thoracic ganglion mass Immunocytochemistry

Preliminary study on the distribution of nutrients, organic matter, trace metals in sea surface microlayer in xiamen Bay and Jiulong Estuary

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Acta Oceanologica Sinica 1990年第1期9卷 81-90页

作者： Hong Huasheng and Lin Jie department of oceanography, xiamen university. xiamen, china

The enrichment of nutrients (Noa-, Noa-, PO43-), suspended particles, organic matter (POC, PON,DOC) , and trace metals (Cu, Ni, Cd) was determined in the sea surface microlayer of xiamen Bay and Jiulong Estuary. The mean enrichment factors ([Xi]microlayer/[Xi ]15cm in depth) mostly ranged between 1 . 0 and 2. 0. The dissolved forms were the major forms of the components measured, the enrichment of dissolved organic matter and suspended particles could lead to the changes in the total amount and speciation of nutrients and trace metals. No correlation was observed between sample concentrations, speciation, enrichment factors and sample locations. However, some evidence shows that these parameters are correlated with sea state, indicating the complexity and dynamic nature of the sea surface microlayer.

关键词： Preliminary study on the distribution of nutrients trace metals in sea surface microlayer in xiamen Bay and Jiulong Estuary Bay

Studies on diffusion and profiles of elements in deep-sea manganese nodules

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Acta Oceanologica Sinica 1989年第3期8卷 391-400页

作者： Luo Shangde , Wang Lei and Huang Yipu department of oceanography, xiamen university, xiamen, china Dept oceanography Xiamen Univ. Xiamen China China

Elemental compositions are measured in manganese nodules collected from the Northern Mid-Pacific floor by inductively-coupled plasma atomic emission spectrometry (1CP-AES) and their growth rates are determined by radiometric methods. The result shows that depth distributions of elements in nodules vary with depth as follows; (i) increase, (ii) decrease and (iii) fluctuation. These internodule variations in elemental compositions are considered to be caused by diffusion and migration of elements in nodules and heterogeneities in textures of nodules. In the present paper, a diffusive model is used to elucidate the inward-increase profile of some elements in nodules. The effective diffusive coefficients are estimated to be of the order of 10-9 cm2/a for Ni, V and Zn in the nodules, which is less than the value reported for radionuclides.

关键词： Studies on diffusion and profiles of elements in deep-sea manganese nodules deep

Studies on the tropomyosin of marine zooplankton

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Acta Oceanologica Sinica 1989年第3期8卷 431-440页

作者： Su Yongquan and Xiao Jinglin’ department of oceanography, xiamen university, xiamen, china department of Biology, xiamen university, xiamen, china

-Investigations on the preparation, structure and biochemical characteristics of tropomyosin (Tm) of Acetes japonicus, A. chinensis and Pseudeuphausia sinica, collected from xiamen coastal water, show that: (1) Tm could be isolated by salting fractionation in the range of 20-35% ammonium sulphate saturation, and the contents of them are 0.86%, 0.87% and 0.70% of dry weight respectively. (2) Molecular weight of Acetes detected by SDS-PAGE method is 3.3-3.6×104, while that of P. sinica, 3.2-3.5×104. (3) Isoelectric points of all the three Tm determined by isoelectric focusing method are at about pH 5.0. (4) Crystalline spindles of above three Tm can be formed in phosphate buffer containing Mg+f at pH 4.8 or pH 7.2, showing cross striations with a repeat period of 38-40 nm under the electron microscope by negative staining, and there are fine lines at irregular intervals in each striation. (5) The characteristics of the chemical composition of three Tm reveal that the strong polar amino acids account for more than 54% of the total amount, and the acidic amino acids, 38-41%. This is in correspondence with the proteins pi 5.0. Littel or no Pro and Trp can be found in these three proteins. (6) Results obtained by the circular dichroism method show that two typical negative peaks of α-helix appeared from 250-190 nm, while the tops of the peaks are at 222 and 208 nm. The percentages of α-helix of the whole chain at 208 nm are 76.6% for A. japonicus, 74.2% for A. chinensis and 61.6% for Psinica.

关键词： Tm

Guided elastic waves in infinite free-clamped hollow cylinders

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Progress in Natural Science:Materials International 2009年第3期19卷 313-320页

作者： Liguo Tang a,b,*, Shengxing Liu a,b a department of oceanography, xiamen university, xiamen 3.1005, china b Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, xiamen university, xiamen 3.1005, china [a]department of oceanography Xiamen University Xiamen 361005 China [b]Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education Xiamen University Xiamen 361005 China

Guided elastic-wave-inspection technique for hollow cylinders has received plenty of attention in recent years because of its high effciency and low cost. To apply guided elastic waves to defects detection, it is necessary to investigate the propagation of guided waves in the hollow cylinders under all kinds of boundary conditions. In this paper, the dispersion equations of torsional, longitudinal and flexural guided waves in the hollow cylinders with traction-free and clamped lateral boundaries are derived by elastodynamic theory, based on which the phase and group velocity dispersion curves of the guided waves mentioned above are obtained. And the dispersion properties of these waves are discussed in detail. The transient wave in a free-clamped hollow cylinder is simulated by the finite element method (FEM). The time-frequency distribution of the transient wave agrees well with the theoretical group velocity dispersion curves.

关键词： Guided elastic waves Free-clamped hollow cylinders Dispersion

Radiochemical studies of deep - sea manganese nodules

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Acta Oceanologica Sinica 1989年第2期8卷 253-261页

作者： Huang Yipu, Luo Shangde, Shi Wenyuan Chen Zhen department of oceanography, xiamen university, xiamen , china Dept. of oceanography Xiamen Univ. Xiamen China China

Five manganese nodules collected from the Northern Mid - Pacific have been analysed for their U and Th *** is found that the enrichment of thorium compared to uranium is universal in deep- sea manganese, nodules and in the top sides of the nodules there are large excesses of Th and Pa decreasing exponentially with depth. For each of the nodules, the concordant growth rates are obtained from three different methods: 230Thex 230Thex/232Th and *** growth rates of manganese nodules are closely related to the chemical compositions of the nodules and the types of the underlying sediments. The growth rates of five nodules are determined to be in the range of 0.79-7.4 mm/106a, in agreement with those predicted from the chemical compositions of the nodules. By the comparison of the extrapolated 230Thex,230Thex/232 Th and 231PaeX data from the top and bottom surfaces of the nodule from Site M21 yields, the nodule turnover time is (9.83-13.7)×104a.

关键词： Th rate sea manganese nodules Radiochemical studies of deep