检索结果-南通市图书馆

Influence of air-sea interaction on SSTA in different spacial scales

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 1990年第2期9卷 203-217页

作者： Sun Jilin and Zuo Zhongdao department of Physical oceanography and Marine Meteorology, qingdao Ocean {3., qingdao, china

-In this paper, the factors for SSTA development in finite sea area of low latitudes are discussed with simpler linearized equations, According to the coupling conditions at the interface of atmosphere and ocean, we studied the horizontal scale relations of air-sea coupled system satisfying the dynamical and thermodynamical requirements, From the fluctuation viewpoint, the relation of horizontal scales and wave numbers are presented for a linear atmosphere-ocean coupled system with the same time scales. At last part of the paper, the state of fluctuations is examined for different sea scales under certain given atmospheric scale with a simpler two-layer coupled model, and some significant results obtained.

关键词： SSTA

Numerical experiments of HAB inducement in qingdao adjacent coastal area

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2010年第5期29卷 109-120页

作者： LIU Xuehai LI Ruixiang YUAN Yeli College of Physical and Environmental oceanography Ocean University of China Qingdao 266100 China First Institute of oceanography State Oceanic Administration Qingdao 266061 China Key Laboratory of Marine Science and Numerical Modeling State Oceanic Administration First Institute of Oceanography State Oceanic Administration Qingdao 266061 China

A three-dimension ecological dynamic model was established to numerically study the relationship of HAB and environmental *** numerical experiments showed that the growth of diatom,the dominant HAB specie,was mainly restricted by phosphate and *** the concentrations of phosphate and silicate reach 17-25 μg/L and 3.0-3.5 μg/L respectively,the water is in a state of *** phosphate and silicate up to 26-3. μg/L and 3.0-500 μg/L respectively,HAB could be *** major regions of HAB occurrence are Jiaozhou Bay mouth,coastal bays,and coastal area from Maidao to *** avoid HAB occurrence,concentration of phosphate and silicate should not exceed 17-20 μg/L and 3.0 μg/L as a *** control of pollutant discharge is a key point to prevent water eutrophication and HAB occurrence.

关键词： HAB numerical model marine ecosystem dynamics environmental condition

Research on dual-stator winding multi-phase high-speed induction generator with rectifier load

在线全文

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2008年第6期51卷 683-692页

作者： WANG XiangHeng1 & WU XinZhen2 1 department of Electrical Engineering, Tsinghua university, Beijing 100084, china 2 department of Electrical Engineering, qingdao university, qingdao 266071, china department of Electrical Engineering Tsinghua University Beijing China department of Electrical Engineering Qingdao University Qingdao China

Based on analysis and calculation of the relation between current harmonics and MMF harmonics in the dual-stator winding multi-phase high-speed induction gen-erator with a rectifier load, a new idea, which divides the generator system into two sub-systems to be analyzed individually, is presented. For the sub-system of the 12-phase power winding with a rectifier load, the loop current method is used to establish network equation set in terms of the network graph theory. The numerical stability problem is solved by alternating use of fixed time-step and varied time-step, and the voltage and current with their fundamental components of the power winding are obtained. For the other sub-system of the induction generator with dual-stator winding and solid cage rotor, the electromagnetic field analysis method and the multi-variable optimization approach are combined to get the con-trol winding current and stator frequency. Calculated results well match experiment results, indicating that the new proposed method is of effectiveness and high ac-curacy.

关键词： dual-stator winding induction generator rectifier load MMF analysis loop current method finite element method optimization approach

Ultra-microbes are the minerogenetic constructors of oceanic polymetallic nodules

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第8期42卷 617-624页

作者： CHEN Jianlin, ZHANG Fusheng and BIAN Lizeng1 Second Institute of oceanography, State Oceanic Administration, Hangzhou 3.0012, china 2 Center for Materials Analysis, Nanjing university, Nanjing 210093. china 3. department of Earth Sciences, Nanjing university, Nanjing 210093. china Second Institute of oceanography State Oceanic Administration Hangzhou China Centu for Materials Analysis Nanjing University Nanjing China department of Earth Sciences Nanjing University Nanjing China

Polymetallic nodules (mangnese nodules) are a typical kind of manganese oncolites The distribution of smooth sur-face and knobbly manganese nodules is closely related to the geological background of the mine field. A systematic study on their inner laminae structure and features suggests that they are the products of millions of years reproduction and accumulation of the recently found Miniactinomyces chinensis and Spirisophaerospora pacijica .

关键词： oceanic manganese nodule stromatolite ultra-microbe biolite.

Is the small-scale turbulence an exclusive breaking product of oceanic internal waves

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2011年第6期30卷 1-11页

作者： FAN Zhisong College of Physical and Environmental oceanography Ocean University of China Qingdao 266100 China

On the basis of the theoretical research results by the author and the literature published up to date, the analysis and the justification presented in this paper show that the breaking products of oceanic internal waves are not only turbulence, but also the fine-scale near-inertial internal waves （the oceanic reversible finestructure） for inertial waves and the internal solitary waves for internal tides respectively. It was found that the oceanic reversible finestructure may be induced by the effect of the horizontal component f （f = 2Ωcosφ） of the rotation vector on inertial waves. And a new instability of the theoretical shear and strain spectra due to the effect of f occurs at critical vertical wavenumber β c ≈ 0.1 cpm. It happens when the levels of shear and strain of the reversible finestructure are higher than those of inertial waves, which is induced by the effect of f along an ＂iso-potential-pycnal＂ of internal wave. If all breaking products of internal waves are taken into account, the average kinetic energy dissipation rate is an order of magnitude larger than the values of turbulence observed by microstructure measurements. The author’s theoretical research results are basically in agreement with those observed in IWEX, DRIFTER and PATCHEX experiments. An important impersonal fact is that on the mean temporal scale of thermohaline circulation these breaking products of internal waves exist simultaneously with turbulence. Because inertial waves are generated by winds at the surface, and internal tides are generated by strong tide-topography interactions, the analysis and justification in this paper support in principle the abyssal recipes Ⅱ：energetics of tidal and wind mixing by Munk Wunsch in 1998, in despite of the results of microstructure measurements for the turbulent kinetic energy dissipation rate and the diapycnal turbulent eddy diffusivity.

关键词： internal waves inertial waves internal tides turbulence oceanic interior mixing

Numerical analysis of the sea (lake ) breeze dynamics and initialization of the model

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 1989年第4期8卷 535-547页

作者： Wu Zengmao Institute of Physical oceanography, Ocean university of qingdao, Oingdao.{3. Inst. Physical oceanography Ocean Univ. of Qingdao Qingdao China. China

In this paper, analysed are the effects of synoptic wind, earth-rotation inertia and land surface roughness on sea (lake) breeze process, on the basis of the calculated results of a 2-D primitive equation model with turbulent energy closure. The results show that a moderate background wind field acts as a trigger for sea (lake) breeze onset, and presents prominent effect on the breeze intensity, inland advance rate and structure feature. The effects of Coriolis force not only make the breeze veering round, but also damp the development of the breeze component normal to *** paper also discussed the dynamic method of wind field initialization based on one-site radiosonde. Three approaches of initialization have been tested. In comparison, it was found that the approach of one-dimensional dynamic initialization with nudging term was preferable to the others.

关键词： lake Numerical analysis of the sea

Ribosomal Protein Genes S23.and L3. from Amphioxus Branchiostoma belcheri tsingtauense:Identification and Copy Number

在线全文

学校读者我要写书评

暂无评论

Acta Biochimica et Biophysica Sinica 2005年第8期37卷 573-579页

作者： Xian LI Shi-Cui ZHANG~* Zhen-Hui LIU Hong-Yan LI department of Marine Biology,Ocean university of china,{3. 2.6003,china department of Marine Biology Ocean University of ChinaQingdao 266003 China

The complete cDNA and deduced amino acid sequences of the ribosomal proteins S23.AmphiS23.and L3.(AmphiL3.)from amphioxus Branchiostoma belcheri tsingtauense were identified inthis ***23.cDNA is 546 bp long and encodes a protein of 143.amino *** has a predictedmolecular mass of 15,851 Da and a pI of ***3. cDNA comprises 473.bp,and codes for a proteinof 123.amino acids with a predicted molecular mass of 14,543.Da and a pI of ***23.shares morethan 83. identity with its homologues in the vertebrates and more than 84% identity with those in ***3. is more than 63. identical to its counterparts in the vertebrates and more than52% identical to those in the *** blot analysis demonstrated the existence of 1-2 copiesof the S23.gene and 2-3.copies of the L3. gene in the genome of amphioxus *** *** in sharp contrast to the presence of 6-13.copies of the S23.gene and 15-17 copies of the L3. gene in therat *** is clear that the housekeeping genes like S23.and L3. underwent a large-scale duplication inthe vertebrate lineage,reinforcing the gene/genome duplication hypothesis.

关键词： amphioxus ribosomal protein S23 L3. copy number

Boundary-processing-technique in EMD method and Hilbert transform

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 Science Bulletin 2001年第11期46卷 954-961页

作者： DENG Yongjun, WANG Wei, QIAN Chengchun, WANG Zhong & DAI DejunNetwork Center, Ocean university of qingdao. qingdao 2.6003,{3. Physical oceanography Laboratory, Ocean Universily of qingdao, qingdao 2.6003,{3. Network Center Ocean University of Qingdao Qingdao China Physical oceanography Laboratory Ocean University of Qingdao Qingdao China

By virtue of neural network, a series of signals is extended forward and backward, as a result, two additional maxima and two additional minima are obtained at both ends of the original data set, with which the EMD decomposition can be exactly achieved with cubic spline interpolation. Meanwhile, by using of neural network every IMF component can also be extended forward and backward, which effectively restrains the end effect, thus the veracious Hilbert spectra are achieved. Verifications of the sample signals and the actual surface elevation of sea waves show that the present extension method is relatively accurate.

关键词： EMD method neural network Hilbert spectrum.

Geochemistry and environment evolution of Core E in the Laizhou Bay since last stage of Middle Pleistocene

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2001年第3期20卷 391-399页

作者： Han Deliang, Yu Hongjun, Li Guanbao 1. Ocean university of qingdao, qingdao 2.6003,{3. 2. First Institute of oceanography, State Oceanic Administration, qingdao 266061,{3. 3. Institute of Oceanology. Chinese Academy of Sciences. qingdao 266 Ocean university of qingdao Qingdao 266003 China First Institute of oceanography State Oceanic Administration Qingdao 266061 China Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

Geochemistry analysis has been done on Core E (3. 07' N, 118 55' E; depth: 82.1 m) taken from the Laizhou Bay in 1994. Nine kinds of invariable elements, 15 kinds of microelements and the content of lime carbonate are measured by means of ICP. The results indicate that most of the invariable elements and microelements in Core E show significant changes in the boundary stratotype, and the ratios between elements (Mn/Fe, Sr/Ba, Ti/Al) in particular. So they can be used as characteristic indicator to stratigraphic division of Quaternary. The changes of invariable elements are primarily controlled by the host minerals, and they mainly indicate the provenance as well as the sedimentation and depositional environment. Several elements, such as Fe, Al, Ca, Mg, Mn and Ti, are very sensitive to the provenance and environment. The distribution of microelements differs in four depositional periods: last stage of Middle Pleistocene, last interglacial period, last glacial period and Recent epoch, and especially in the 'cold period' and 'warm period'. The loops in the cycle curves of the most microelements correspond with the sand bed sediments, among which there are six sand units representing 'warm period' sediments, and one representing 'cold period' sediments. The carbonate is on the high side in the aeolian silt sediments formed in the glacial lowering of sea level in Core E, but on the low side in the transgressive sand beds formed in the interglacial period. The content variation of carbonate has a direct bearing on the grain size and the styles of sediments, and is a good indicator to the climate, environment and stratigraphic division.

关键词： Laizhou Bay last stage of Middle Pleistocene geochemistry paleo-environment element strata