可数不分明紧的注记

本文在文献[1]的基础上,另外给出不分明集是可数紧的充要条件,若不分明拓补空间满足C_1或Q—C_1公理,我们还得到可数不分明紧空间的几个等价条件:     

拓扑分子格上最细伴随余拓扑的刻划

该文选用恰当的闭包算子 ,对给定的拓扑分子格 (L,η)中 η的最细伴随余拓扑 F(η)进行刻划 ;其次刻划了拓扑分子格中无处稠密元 ,讨论无处稠密元、半闭包算子和半内部算子之间的关系 ,特别引入了半同胚的概念 ,并证明无处稠密性是半同胚性质。     

亚对数空间限定的多墨水点交替式下推自动机的闭包属性

交替式下推自动机是并行计算的一种模型,它的空间计算复杂性研究对于解明并行算法的内存消耗具有重要意义。复杂性语言族的闭包属性反映了具有一定复杂性空间的并行计算模型之间的组合关系。论文研究仅有全称状态的交替式下推自动机的闭包属性,这些自动机均具有多个墨水点和亚对数限定的存储空间.通过设立巧妙的证人语言,本文使用反证法证明了具有有限多个墨水点的仅有全称状态的交替式下推自动机在星号、保持长度的同态、以及与正则语言的连结等运算下是不封闭的。     

半滑舌鳎精子发生的组织学研究

本文应用组织学方法对半滑舌鳎雄鱼精巢结构和精子发生过程进行了详细地研究．观察结果表明，它的精巢结构特点是随着精巢的发育可见它的精巢外面有一条管状贮精囊与输出管相连，在精巢发育成熟过程中，贮精囊中逐渐充满精子，这个特点有助于了解半滑舌鳎的受精生物学的复杂性．另外，从半滑舌鳎精子发生过程分析，它的精巢属于小叶型，精巢发育分为6期．精子发生经历精原细胞、精母细胞、精子细胞及精子．最后，文中还讨论了半滑舌鳎精巢中非生殖细胞（间质细胞和Sertoli细胞）的分布及其可能的生理作用．     

关于诱导映射的注记

指出与修正了何明在“Ｌ不分明集上的双诱导映射”（《科学通报》），１９８６年第６期４７５页）一文中的错误。推广了双诱导映射的概念，即给出了ｆ、ｇｘ的诱导映射的定义，并讨论了它的性质，这对由分明集、低层次集上的映射构造不同特色的不分明集、高层次集上的映射是有指导意义的。     

诱导映射及与其相关的诸映射的性质和应用

本文给出诱导映射的定义．讨论其重要性质，提出其中每一条都可以作为诱导映射的另一定义，这有益于对诱导映射的不同刻画，扩大了诱导映射的范围。作者给出了诱导映射在格拓扑和格的代数同态方面的应用；同时作者力图把高层次的或不分明集上的“具有某种性质”的映射分解成低层次的或分明集上的同样“具有某种性质”的映射，这对不同特色的映射的构造是有意义的     

带梯度项的半线性椭圆型方程正径向整大解的存在性

本文研究带梯度项的半线性椭圆型方程正径向整大解的存在性.先利用Banach不动点定理和反证法得出正径向解的局部及整体存在性,进而得到正径向整大解的存在性结论.结果发现,正径向整大解的存在性依赖于梯度项的系数符号和指数的范围.     

南海西北部半日内潮参量次谐频不稳定生成的近惯性波研究

为了研究非临界纬度上参量次谐频不稳定(parametric subharmonic instability,PSI)过程生成的近惯性波(near-inertial wave,NIW),本文基于国家重点研发项目的 准实时传输深海潜标资料,对内波速度谱、近惯性流速和动能、D2-f(半日频减惯性频)流速和动能、半日内潮流速和...     

半滑舌鳎苗种体外挂牌标志技术研究

研制了4种不同规格的T型标志牌(T-A,T-B,TC,T-D),对不同规格的半滑舌鳎苗种进行了标记试验,记录了标记后的脱牌率、成活率、行为特征和生长情况,筛选了适宜于半滑舌鳎苗种标志放流的T型标志牌.结果表明:T-A标志牌适宜于标记全长8 cm以上的苗种,标记后的实验鱼生长与对照组无显著差异,标志后暂养成活率92％～100％;T-B标志牌适宜标记全长16 cm的苗种,标记后实验鱼成活率达到100％,脱牌率为0.T-C和T-D标志牌不适宜于标记全长16 cm以下的半滑舌鳎苗种.2011年,利用本研究开发的T-A标志牌标记半滑舌鳎苗种,并在莱州开展大规模标志放流试验,标记效果良好.     

依比例、不依比例和半依比例符号数学定义的修改

定义了一般地图符号后，在此基础上引入地物的真实像，通过地图符号与真实像相同、包含和半包含关系的讨论，分别推导了依比例符号、不依比例符号和半依比例符号数学定义。修改后的定义更能反映三种符号的本质特征和内在联系，定义的表达也更为简捷。     

浙江乐清湾现代沉积与悬沙质量浓度分布特征及意义

通过对乐清湾野外考察、表层沉积物的粒度分析和水样的悬沙质量浓度分析，探讨了乐清湾现代沉积和悬沙质量浓度分布特征。研究结果表明，乐清湾现代沉积主要以细颗粒沉降为主，粉沙和粘土总含量占90％以上；悬沙质量浓度具有从湾口向湾内递减的变化趋势，湾口悬沙质量浓度为0．2～0．25kg／m^3，而湾内质量浓度小于0．01kg／m^3。半封闭性海湾和以外海来沙为主的物质来源共同决定沉积物的特征及悬沙质量浓度的空间变化规律，而泥沙来源及沉积过程的研究将为港湾治理工程提供重要的依据参数。     

DISCUSSION OF SOME CONCEPTIONS OF A WATER MASS BASED ON THE THEORY OF FUZZY SETS

The fundamental principle for differentiating water masses is a strict consideration of their relative "interior homogeneity" and obvious "exterior differences" with others in characteristics. The conceptions of water type, water mass and water system are dealt with on the basis of the theory of fuzzy sets. A proposal to apply the theory of fuzzy sets to define the water mass and its core, independent area, boundary and mixing area is put forward.As an example, the membership function of the surface water masses in the Yellow Sea and East China Sea in August, 1979, are considered. Their cores, independent areas, boundaries, mixing areas and the approximation degrees between different water masses are calculated respectively. The water masses are ranged according to their fuzzy degrees.     

A note on modeling double diffusive mixing in the global ocean

Though ubiquitous in the global oceans, double diffusive mixing has been largely ignored or poorly represented in the models of turbulent mixing in the ocean and in 3-D ocean models, until recently. Salt fingers occur in the interior of many marginal seas and ocean basins, the Tyrrhenian Sea and the subtropical Atlantic being two examples. Diffusive convection type of double diffusion occurs in the upper layers of many sub-polar seas and polar oceans due to cold melt water from sea ice. Consequently, it is important to be able to properly parameterize double diffusive mixing in basin scale and global ocean models, so that the water mass structure in the interior of the ocean can be properly simulated. This note describes a model for double diffusive mixing in the presence of background shear, based on Mellor–Yamada type second moment closure, more specifically Kantha, 2003, Kantha and Clayson, 2004 second moment closure models of resulting turbulence, following Canuto et al. (2008a) but employing a different strategy for modeling the pertinent terms in the second moment equations. The resulting model is suitable for inclusion in ocean general circulation models.     

Diapycnal mixing by meso-scale eddies

The mean available potential energy released by baroclinic instability into the meso-scale eddy field has to be dissipated in some way and Tandon and Garrett [Tandon, A., Garrett, C., 1996. On a recent parameterization of mesoscale eddies. J. Phys. Oceanogr. 26 (3), 406–416] suggested that this dissipation could ultimately involve irreversible mixing of buoyancy by molecular processes at the small-scale end of the turbulence cascade. We revisit this idea and argue that the presence of dissipation within the thermocline automatically requires that a component of the eddy flux associated with meso-scale eddies must be associated with irreversible mixing of buoyancy within the thermocline. We offer a parameterisation of the implied diapycnal diffusivity based on (i) the dissipation rate for eddy kinetic energy given by the meso-scale eddy closure of Eden and Greatbatch [Eden, C., Greatbatch, R.J., 2008. Towards a meso-scale eddy closure. Ocean Modell. 20, 223–239.] and (ii) a fixed mixing efficiency. The implied eddy-induced diapycnal diffusivity (κ) is implemented in a coarse resolution model of the North Atlantic. In contrast to the vertical diffusivity given by a standard vertical mixing scheme, large lateral inhomogeneities can be found for κ in the interior of the ocean. In general, κ is large, i.e. up to o(10) cm²/s, near the western boundaries and almost vanishing in the interior of the ocean.     

湍流混合输运通量的数学物理描述基础——高确定性闭合的湍流二阶矩和基本特征量控制方程组

湍流,在海洋动力系统其他类运动的控制方程组中,主要以输运通量剩余项的形式出现,它是最重要的海洋混合运动主体。本文的主要研究目标是,在湍流最新研究成果及其子系统控制方程组基础上,提出高确定性的二阶矩闭合原理,导出闭合的二阶矩和基本特征量控制方程组,建立湍流输运通量的数学物理描述基础。现有的湍流基本特征量方程组,其右端项的闭合办法实际上是非独立的。因此要么在今后的研究中引入独立的闭合办法,要么回归到湍流的现场实验分析研究,给出独立的特征量实验关系,从而有可能得到湍流混合系数的解析估计。     

模糊模式识别用于找矿预测

本文提出两类模糊模式识别用于找矿预测的具体方法．用Ｆ－ＰＦＳ法和调节特征因素及其权重以获取最佳分类，聚类中心即作为标准模式．根据单因素判对率确立了因素逆距离权重的概念．在标准模式的模糊向量与已知单元模糊向量之间关系的基础上可以建二线性不等式方程组，从而可解不同因素的距离权重，并进而用贴近度对未知单元进行识别．以上方法应用于鄂东南地区的铜及多金属的找矿预测，结果表明方法有效。成果较好。     

Spatiotemporal variations in the organic carbon accumulation rate in mangrove sediments from the Yingluo Bay,China, since 1900

Mangroves can not only provide multiple ecosystem service functions, but are also efficient carbon producers,capturers, and sinks. The estimation of the organic carbon accumulation rate(OCAR) in mangrove sediments is fundamental for elucidating the role of mangroves in the global carbon budget. In particular, understanding the past changes in the OCAR in mangrove sediments is vital for predicting the future role of mangroves in the rapidly changing environment. In this study, three dated sediment cores from interior and fringe of mangroves in the Yingluo Bay, China, were used to reconstruct the spatiotemporal variations of the calculated OCAR since 1900 in this area. The increasing OCAR in the mangrove interior was attributed to mangrove flourishment induced by climate change characterized by the rising temperature. However, in the mangrove fringe, the strengthening hydrodynamic conditions under the sea level rise were responsible for the decreasing OCAR, particularly after the1940 s. Furthermore, the duration of inundation by seawater was the primary factors controlling the spatial variability of the OCAR from the mangrove fringe to interior, while the strengthened hydrodynamic conditions after the 1940 s broke this original pattern.     

两种不同海洋生物材料对大鼠急性创面修复效果的研究

为研究来源于海洋的鱼类胶原蛋白和海藻酸盐对创面的修复效果,建立大鼠皮肤急性创面模型,对两种材料的功效进行探索。研究采用临床常用创面敷料使用方法,将两种材料植入创面处,采用细胞生物学、病理学等方法进行观察评价。结果显示,鱼胶原蛋白和海藻酸盐均具有良好的生物相容性和诱导创面修复能力,但在诱导血管长入、材料降解融合以及整体创面修复状态等方面,鱼类胶原蛋白要优于海藻酸盐。结果证明,两种不同的海洋生物材料均可以创造良好的伤口愈合环境,有效促进创面的修复。     

Abundance,biomass and species composition of nearshore fish assemblages in Ghana,West Africa

Many of the world's fish populations are overexploited, including Ghana's fish resources. This study examines spatio-temporal trends in fish species composition in relation to biotic, abiotic and anthropogenic factors, towards achieving better-informed management of the beach-seine fisheries. Fishery-dependent data were collected between November 1999 and October 2001 from 94 beach-seine hauls fished at two stations along the Ghanaian coast. The catch consisted of fish, crustaceans, other invertebrates, and macroalgae. Generally, juveniles of species that are exploited by offshore fisheries were found in the catches. Species abundance and their occurrence generally peaked between November and January. Duration of solar radiation and tide level appeared to be important predictors of fish biomass. It is important to exploit the nearshore fish assemblage sustainably because of its nursery role. A co-managed (fishers and government) three-month ban on beach-seining (between May and July) is recommended as the most appropriate control measure towards the sustainability of Ghanaian fish stocks.