基于生产性服务业的长江三角洲城市网络

全球化进程中,城市网络的研究成为国内外学者关注的重要前沿。借鉴西方有关的研究工具,从城市网络的层级特征、网络模式、功能特征三个方面分析了长江三角洲地区的生产性服务业的城市网络发展特征。研究表明：基于生产性服务业的长三角城市网络具有显著的层级特征,与已有的城市等级体系特征并不完全一致,个别城市如昆山、义乌等城市承担了重要的网络联系中心的作用。同时,城市间的网络连接也呈现出明显的位序关系,三大核心节点城市（上海、南京、杭州）之间的联系形成了长三角地区城市间网络的最主要的联系。从影响范围来看,上海的网络指向性最强,涉及面也最广,但南京和杭州的影响不再仅仅局限于自身所在省份之内,扁平化发展的趋势愈发显著。网络联系的核心区域开始由传统的上海、南京、杭州、宁波所围合的“Z”字型区域向北部的南通、扬州以及南部的绍兴等地区扩散。根据不同类型的生产性服务业所形成的网络特征的不同,将11个部门分为完善型、扁平型、专业型等三种类型。     

四川绵竹山洪灾害风险区划

本文基于GIS技术,运用指数模型,采用层次分析法对四川省典型山洪灾害发生区绵竹市进行山洪灾害风险区划,并运用近20年灾情资料进行验证。结果表明:绵竹市山洪灾害较高风险区、高风险区主要分布于中部的山区、沿山区,与实际情况较为一致,可为当地山洪防灾减灾工作的规划布局提供科学依据。      

地震地下流体观测现状

系统介绍我国地震地下流体井（泉）的分布现状、观测井含水层特征及自流热水井的观测现状,并介绍观测项目及主要观测仪器等。上述调查与分析结果,可为我国地震地下流体台网的进一步调整与优化,及今后地震地下流体学科的发展提供科学依据。     

Interdecadal variations of surface winds over China marginal seas

Long term variability in the surface winds over the marginal seas of China is examined with a dominant-mode singular value decomposition method. Both interannual and interdecadal patterns are found to be seasonally and spatially dependent, with reanalyses and satellite remote sensing data yielding highly consistent results. The study reveals that summer monsoon winds over the East China Sea experienced an interdecadal weakening in the late 1960s and began a persistent recovery in 2005. The study also shows gradual weakening of the winter monsoon in the southern South China Sea by more than 2m/s since the 1960s, with corroboration from coastal climate stations in Borneo. This phenomenon has not been reported in previous monsoon studies.     

Agrobiodiversity of Muda Rice Agroecosystem:A case Study in Largest Granary Area of Malaysia

A survey was carried out at the largest rice cultivation area in Peninsular Malaysia,the Muda rice agroecosystem.The main objective of this study was to document the overall biodiversity associated with this unique agroecosystem by using a combination of sampling techniques in order to record different groups of fauna and flora.The total number of biota recorded and identified from the rice field ecosystem during the study period consisted of 46 species of zooplankton,81 species of aquatic insects,5 species of rodents,7 species of bats,87 species of birds,11 species of fishes and 58 species of weeds.A long-term study should be carried out as more species are expected to be recorded when more of the Muda rice agroecosystem area has been sampled to obtain sufficient information on the Muda rice agrobiodiversity.     

南秦岭旬阳盆地东部晚泥盆世岩浆成因钠长岩及其构造意义

南秦岭旬阳盆地的钠长岩此前被认为是热水沉积或热液交代作用的产物。本文对南秦岭旬阳盆地东端黄石板地区侵入于下志留统梅子亚组浅变质岩中的钠长岩体进行了地球化学和锆石U-Pb LA-ICP-MS年代学研究,结果表明钠长岩具有富钠贫钾、铝不饱和、亏损大离子亲石元素K和Rb、高场强元素(Nb、Ta、Th、Hf)显著富集的地球化学特点,主体属于钙碱性系列岩石,反映幔源成因的特征。钠长岩中获得最年轻的锆石U-Pb年龄为364~376Ma,该年龄代表岩体的形成年龄,反映晚泥盆世时南秦岭旬阳盆地处于强烈的伸展构造环境。此项研究结果表明,在旬阳盆地的志留系中,岩浆成因与热水沉积成因的钠长岩可能是共存的。黄石板岩浆成因钠长岩岩体中含有大量前寒武纪和早古生代的捕获锆石,在捕获锆石中测得迄今为止在研究区及其邻区获得的最古老的锆石U-Pb年龄(3291Ma)。这些捕获锆石的测年数据说明,研究区所在的南秦岭地区可能从古太古代开始就与扬子地块具有明显的亲缘性。     

Surfactants in the sea-surface microlayer and their contribution to atmospheric aerosols around coastal areas of the Malaysian peninsula

A study was done to determine the concentrations of surfactants on the sea-surface microlayer and in atmospheric aerosols in several coastal areas around the Malaysian peninsula. The concentrations of surfactants from the sea-surface microlayer (collected using rotation drum) and from aerosols (collected using HVS) were analyzed as methylene blue active substances and disulphine blue active substances through the colorimetric method using a UV-vis spectrophotometer. The results of this study showed that the average concentrations of surfactants in the sea-surface microlayer ranged between undetected and 0.36 ± 0.34 μmol L⁻¹ for MBAS and between 0.11 ± 0.02 and 0.21 ± 0.13 μmol L⁻¹ for DBAS. The contribution of surfactants from the sea-surface microlayer to the composition of surfactants in atmospheric aerosols appears to be very minimal and more dominant in fine mode aerosols.     

水库诱发地震地下水监测网建设的若干问题探讨

根据国内外已发生的水库诱发地震的基本特点,结合三峡工程诱发地震地下水监测网与金沙江下游水电工程地下水监测网建设的经验及我国地震地下水动态观测网建设与运行中得到的科学认识,探讨了水库诱发地震的地下水监测井网建设中的布网区及其范围、观测井间距确定、观测井位置选择、观测含水层选择与观测井深度和结构设计等若干技术问题.     

基于桁架-拱模型的T形截面宽肢异形柱受剪承载力试验研究

将桁架-拱模型理论应用于钢筋混凝土异形柱斜截面受剪承载力分析研究,以T形截面混凝土宽肢异形柱为例,提出了T形截面宽肢异形柱的斜截面受剪承载力计算公式。并与试验结果进行对比,研究表明通过桁架-拱模型理论建立混凝土异形柱斜截面受剪承载力计算公式是可行的,文中还与异形柱现行规程提出的受剪承载力计算公式进行了对比研究。该方法可为混凝土宽肢异形柱受剪承载力分析和计算提供参考。     

Variability of Antarctic Intermediate Water south of Australia and its relationship with frontal waves

A streamfunction EOF method is applied to a time series of hydrographic sections in the Southern Ocean south of Australia to study water mass variations. Results show that there are large thermohaline variations north of the Subantarctic Front (SAF) at 300–1500 dbar level, indicating upwelling and downwelling of the Antarctic Intermediate Water (AAIW) along isopycnal surfaces. Based on the latest altimeter product, Absolute Dynamic Topography, a mechanism due to frontal wave propagation is proposed to explain this phenomenon, and an index for frontal waves is defined. When the frontal wave is in positive (negative) phase, the SAF flows northeastward (southeastward) with the fresh AAIW downwelling (upwelling). Such mesoscale processes greatly enhance cross-frontal exchanges of water masses. Spectral analysis shows that frontal waves in the Southern Ocean south of Australia are dominated by a period of about 130 days with a phase speed of 4 cm/s and a wavelength of 450 km.