快速工业化区域土地利用变迁机制研究:发展模式视角——以佛山市南海区为例

从发展模式及其变迁的全新视角研究快速工业化区域土地利用变迁,有利于深刻揭示发展模式对区域土地利用变迁的重要影响机制,从而为制定合理有效的调控对策提供理论依据。文中利用历史普查、更新调查和逐年统计数据,结合卫星影像资料和实地调研,在简要分析典型案例区域佛山市南海区耕地变化和建设用地扩张时空特征的基础上,重点从发展模式及其变迁的视角,综合研究快速工业化区域土地利用变迁的动力机制与过程,并进一步探讨新形势下区域发展与土地利用的耦合调控对策。     

共反射面元叠加技术在南海北部莺—琼盆地中的应用

随着莺—琼盆地油气勘探开发的不断深入,2 700 m以下的中深层地震资料品质迫切需要提高,而改善信噪比提高成像质量则是需要深入研究的重点内容之一。基于共反射面元(CRS)叠加在改善中深层地震资料信噪比方面具有理论和技术应用优势,由于考虑了反射层的局部特征和第一菲涅耳带内的全部反射,对复杂地质问题的适应性得以增强,真正实现了高信噪比叠加,从而改善中深层低信噪比区的成像质量。通过理论研究分析、模型试处理及莺—琼盆地实际地震资料处理中具体的应用与试验,取得了明显的效果,即该区中深层地震资料信噪比显著增强,大大提高了解释的可靠程度。总之,共反射面元叠加技术在莺—琼盆地具有较高的推广应用价值。     

山西离柳集团化肥厂雷击原因分析及防雷方案

离柳集团化肥厂几乎每年均遭受雷害侵袭造成较大损失。本文对雷击原因（特别是DCS系统雷击原因）进行了系统分析并提出综合防雷方案。该方案2007年实施后取得良好的防雷效果。     

黏声介质平面波有限差分叠前深度偏移及在莺歌海盆地的应用

莺琼盆地诸探区中存在底劈现象,深层气源产生的气体沿底劈产生的裂隙通道向上漫溢.漫溢过程中,一是充填在遇到的砂体中形成气藏;二是弥漫在上溢通道中,使得通道中的纵波速度发生变化,进而纵波波阻抗差异变小,反射变弱.另外,通道中气体的存在,会加强地层的吸收衰减,使得地震波振幅变弱、高频成分损失导致同相轴分辨率降低.利用OBC数据进行多波地震勘探和利用黏声介质的叠前深度偏移都是改善模糊区成像质量的重要方法技术.为此,本文提出用黏声介质平面波有限差分法叠前深度偏移成像方法改善气体充填区域的成像质量.黏声介质成像目的是补偿地震波的吸收衰减;平面波偏移成像目的是适应海上单炮数量巨大,提高波动方程叠前深度偏移成像的效率;有限差分法叠前偏移的目的是适应该区浅层气分布局域性极强、Q值的空间变化大的情况.在莺歌海某探区的实际数据上的黏声介质平面波有限差分叠前深度偏移试验证明,本方法是改善模糊区成像质量的较为有效的途径.     

Wintertime temperature-salinity characteristics in the southeastern Hwanghae (Yellow Sea)

Wintertime temperature-salinity properties of the southeastern Hwanghae (Yellow Sea) were analysed, based on long-term hydrographic data gathered between 1961 and 1980. A strong thermohaline front is formed in the area west of Cheju-do (along 33?40′N in the region bounded by 124? E and 126?20′E) during winter and extends to the bottom. This surface-to-bottom front, running from west to east, divides water properties into two types: one type of low temperature and low salinity to the north of the front and another one of high temperature and high salinity to the south of the front. The existence of the front suggests that there is no northward flow in the study area, a finding which runs counter to the conventional belief that there is the Hwanghae Warm Current carrying waters of high temperature and salinity to the north. T-S diagrams show that in winter the Hwanghae Warm Current Water and the Hwanghae Cold Water are the representative water masses in the study area.     

Seasonal circulation in the southeastern Huanghai Sea

The seasonal circulation in the southeastern Huanghai Sea has been studied with hydrographic data,which were observed in February and June 1994 and bimonthly during 1970-1990,and numerical model results.Horiwntal distributions of temperature and salinity in 1994 are quite different due to strong tidal mixing so that we need a analysis to see the real distributions of water masses.The mixing ratio analysis with the data of 1970-1990 shows the connection of the waters in the west coasts of Kotea Peninsula with warm and saline waters from the south in summer,which means northward inflows along the west coasts of Korea Peninsula in summer.With this flow,the seasonal circulations,which are deduced from the seasonal change of water mass distributions in the lower layer,are warm inflows in winter and mld outflows in summer in the central Huanghai Sea,and cold outflows in winter and warm inflows in summer along the west coasts of Korea Peninsula.The seasonally changed inflows might be the Huanghai Sea Warm Current.The monsoon winds can drive such circulations.However,summer monsoon winds are weak and irregular.As one of other possible dynamics,the variation of Kuroshio transport is numerically studied with allowing sea level fluctuations.Although it should be studied more,it possibly drives the summer circulations.The real circulations seem to be driven by both of them.     

Reconstruction of regular time series from bi-monthly temperature data in the Yellow Sea and the northwestern East China Sea

Reconstruction of evenly-spaced, regular time series from routine survey serial data was investigated for precise analysis of spatio-temporal variations in a temperate sea at mid-latitudes where the seasonality dominates the interannual variability. Considering that the annual range of sea surface temperature in the Yellow Sea and the northwestern East China Sea can be as large as 15–20 °C, temperature data collected bi-monthly in these temperate seas were used for the assessment of reconstruction methodology. The cubic spline interpolation with a sampling interval of 0.5 months reconstructed the regular time series closest to the in-situ measurements among various interpolation schemes. Also, two computation methods for the interannual anomaly were compared; the residual method that the long-term monthly means are subtracted from the monthly serial data and the filtering method that high-frequency variations are removed using a low-pass filter. In that the high-frequency variations in frequencies greater than 1 cycle per year are comparable in magnitude to the interannual variation, the residual method proves inadequate in the temperate sea. High-frequency noises can be effectively removed through the use of a proper low-pass filter with bell-shaped weights.     

夏季对马暖流区黑潮水与陆架水的相互作用──兼论对马暖流的起源

根据1994年8月28日至9月7日韩国“Onnuri”号海洋调查船获得的CTD资料及在调查期间投放的11个卫星跟踪漂流浮标资料,分析研究了东海东北部黑潮水的分离及其与陆架水的相互作用,进而探讨了夏季的对马暖流的形成过程。