中国东部海域冬季风场与海浪场的关联特征分析

利用WAVEWATCHⅢ海浪模式模拟的1993-2011年中国东部海域19 a冬季逐日海浪场资料以及同期CCMP逐日风场资料,采用奇异值分解(SVD)的方法分析了冬季中国东部海域海浪场与提前0~5 d的东亚大陆地面风场的关联特征。结果发现:海浪场与提前1 d的地面风场的关联更有意义;SVD第一模态和第二模态分别反映了贝加尔湖以东南下的反气旋式偏北扰动大风(或气旋式偏南扰动大风)和中国东部平原入海的气旋式扰动风场(或反气旋式扰动风场)对中国东部海域海浪的扰动影响。此外,SVD分析还揭示了冬季影响中国东部海域海浪的大风关键区和移动路径;随着时间的推移,大风关键区从贝加尔湖以东逐步由蒙古南下影响中国东北和华北地区,最后到达中国东部海域。     

一种基于点特征的高精度图像配准方法

提出了一种基于点特征的多源图像高精度配准方法。通过在遥感影像上提取密集特征点,利用多种方法结合进行严格匹配获得同名点对。通过构建不规则三角网分割影像,再利用仿射变换模型实现每个三角形的配准。实验证明了该方法的有效性和较高的适用性。     

广西南宁盆地早第三纪沉积相特征

本文论述了南宁盆地的地质构造背景和第三纪地层、沉积相、古地理演化特征,其中侧重对沉积相剖析认为:南宁盆地在中生代以来形成的NE、NW向两组断裂的“X”型构造背景条件下,受NEE、NNE向各两条断裂控制呈菱形状的第三纪陆相断陷盆地;沉积相以湖相为主,河流相、洪积相次之。前者可分为滨湖、浅湖、半深湖等3个亚相,尤以浅湖相发育,后二者仅在古新世至始新世早、中期发育并分布在湖盆边缘;盆地演化过程中始新世时曾一度上升遭受剥蚀,致使瓦窑村组与上覆地层呈不整合接触,由古新世→始新世末盆地中心由SW→NE迁移,盆地范围增大趋势。还指出南湖组与凤凰山组、古亭组是同期(始新世早、中期)异相产物,盆地内产褐煤、粘土与石英砂等矿产。     

军曹鱼不同组织5种同工酶的研究

采用聚丙烯酰胺垂直凝胶电泳法对军曹鱼的几种组织 (脑、心肌、肾、肌肉、性腺、肝、血液、胰、脾 )的 5种同工酶 (LDH、MDH、ME、POD和EST)进行了分析 ,结果表明 :5种同工酶在军曹鱼中都具有明显的组织特异性 ,这些特异性与其组织特定生理功能相关。与其他硬骨鱼类相比 ,军曹鱼的酶谱简单得多 ,这可能与其种属多样性相关。     

任一力学量■的矩阵元Fmn的微扰近似计算

本文以能量和波函数的各级微扰近似的基态展开式为基础,推导出任一力学量的矩阵元F_(mn)的各级微扰近似表示式。并且指出只要构成能量展式的级数收敛很快,满足能够应用微扰的条件,那么对于任一力学量F的微扰计算,只要计算矩阵元F_(mn)的前二级近似就已足够精确。     

LC元件参数的数字测量方法与设计

本文着重说明如何将LC元件的諸参数转换为相应的数字量,以适应数字測量的要求。本文采用的方法与设计,具有电路结构简单,易于实现的特点。     

光学亮星系大尺度分布中的多级结构

本文在Wen等人工作的基础上,对CfA红移巡天样本中银道以北和以南天区中星系的大尺度分布分别进行了分维计算并比较其所得结果。分析表明,这两个区域内星系的大尺度分布存在显著差异。说明CfA样本还不能构成代表宇宙大尺度结构的好样本。另一方面,两个区域中样本分析结果又存在着一些明显的共同点:它们都表现出明显的多级分形特征。结合对IRAS星系红移巡天样本和星系分立小天区红移巡天样本的分析结果。我们认为,多级分形很可能是宇宙大尺度结构的一个普遍和重要的特征。本文对这一特征的含义也作了简略的讨论。     

The mulberry dike-carp pond resource system of the Zhujiang (Pearl River) Delta,People's Republic of China: I. Environmental context and system overview

Although not well understood scientifically, integrated and diversified aquaculture-agriculture systems have a history of some two millennia in parts of South and Southeast Asia. With the extremely limited farm area and scanty resources available to the typical small-scale farmer of these regions, integrated agro-ecosystems, based on generations of empirical knowledge, provide a balanced diet and often a small marketable surplus for poor rural households, while continuously recycling nutrients and energy through the system, producing little waste, and maintaining a local ecological balance. Despite the few scientific data available on such systems, they are being widely advocated for use in developing countries with no prior experience of integrated farming.This paper (paper I) describes the environmental context and provides an overview of the mulberry dike-polycultural carp pond resource system of Leliu Commune, in the Zhujiang Delta of the People's Republic of China, where complex and highly productive integrated farming systems are operated on a geographical and economic scale unmatched elsewhere. Subsequent papers will focus on the human ecology of the dike-pond system, the ecological basis for system integration, and the results and implications of experiments and trials for increasing the productivity of and the economic rate of return from the system.     

The adsorption and interaction of long-chain fatty acids and heavy metals at the mercury electrode/sodium chloride solution interface

The reduction of heavy metals (cadmium, lead and zinc) in the presence of long-chain fatty acids (lauric, oleic and linoleic) in 0.55 mol dm^?3 NaCl and 0.03 mol dm^?3 NaHCO₃ at pH 8.7 has been studied by differential pulse polarography. The increase of the peak height of investigated metals by up to tenfold the value obtained in electrolyte without fatty acid is due to adsorption of metal ions at the electrode surface. The accumulation of metal increases with the increase of adsorption time (at potentials more positive than the reduction potential of the particular metal) and with increase of salinity. The heavy-metal adsorption depends on the concentrations of both metal ions and fatty acids. The interaction of heavy metals with the unsaturated fatty acids in the bulk and/or in the adsorbed layer at different natural interfaces could be of considerable importance in an understanding of the fate and distribution of heavy metals in the natural aquatic environment.     

Comparison of two techniques for applying disjunctive kriging: The Gaussian anamorphosis model versus the direct statistical inference of the bivariate distributions

Indicator cokriging is an alternative to disjunctive kriging for estimation of spatial distributions. One way to determine which of these techniques is more accurate for estimation of spatial distributions is to apply each to a particular type of data. A procedure is developed for evaluation of disjunctive kriging and indicator cokriging for such an application. Application of this procedure to earthquake ground motion data found disjunctive kriging to be at least as accurate as indicator cokriging for estimation of spatial distributions of peak horizontal acceleration. Indicator cokriging was superior for all other types of earthquake ground motion data.