西湖凹陷油气成藏的主控因素     

熊斌辉  张喜林  张锦伟  王春红  杨海长 《海洋地质译丛》2008,(2):14-24

西湖凹陷位于东海大陆架边缘，地壳为相对软弱的过渡壳。西湖凹陷中新世末以前属于萎缩型盆地，上新世伴随冲绳海槽的形成才成为扩张性盆地。受构造控制盆地萎缩期沉积有以下3个特点：第一，整体表现为海退；第二，沉积范围逐次减小；第三，泥岩百分比越来越低，盖层条件越来越差。平湖组存在区域盖层，钻遇断块气藏；花港组存在局部盖层，背斜充满度高，断背斜充满度低，断块未成藏；新近系盖层条件更差，断背斜亦未能成藏。由此可见保存条件是西湖凹陷油气成藏的主控因素，保存条件好的领域是西湖凹陷下一步勘探的方向。  相似文献   

UCD航摄像片在大比例尺地形图中的应用   总被引：2，自引：0，他引：2  

孙粉霞  邹学忠 《现代测绘》2009,32(4):41-41,48

本文阐述了UCD数码航摄相机的原理、功能及优点,结合在生产中的应用实践,分析了UCD数码航摄像片的成图精度.  相似文献   

Further improvements to the higher-order Boussinesq equations: Bragg reflection     

Z.L. Zou  Z.B. Liu  K.Z. Fang 《Coastal Engineering》2009,56(5-6):672-687

Enhancements for the Bragg reflection are introduced for three sets of 2D higher order Boussinesq equations to improve the prediction of the Bragg reflection. The extension of the approach to other sets of Boussinesq equations is discussed. The analytical solutions for the Bragg reflection over an infinite number of sinusoidal bars are derived for these Boussinesq models and compared to the exact theoretical solution in order to determine the optimized values of the parameters in the new enhancement terms. Numerical simulations are also carried out for the Bragg reflection over a finite number of sand bars and compared with corresponding measurements to validate the enhancements. Comparisons with other forms of Boussinesq models are made to discuss the applicability of different forms of Boussinesq models to rapidly varying topography with sand bars. The effects of the mild slope assumption on the prediction of Bragg reflection and of wave reflection on a plane self are also discussed.  相似文献   

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周晓卫  戴吾蛟  朱建军  邹峥嵘 《大地测量与地球动力学》2007,27(1):107-111

????????Helmert????????????Vondrak????????????HVF??????????????GPS??·??Ч????о????????????????????????????÷???????????Vondrak?????????????????????????????????Ч????????????????е????????????????÷????????·????????????GPS??·??Ч?????????????????????Ч????????·??Ч??????????????????GPS??λ?????  相似文献   

利用SLR计算地心运动方法研究     

李欣  郭唐永  张念  骆天天  王培源  邹彤 《大地测量与地球动力学》2007,27(Z1):47-48

Three methods for calculation of geocenter motion are intruduced.  相似文献   

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邢乐林  李建成  李辉  邹正波  周新 《大地测量与地球动力学》2007,27(6):33-36

???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????о??????? ????????????????????????????????б?′?????????????????????????????????????????????????  相似文献   

巴旦杏越冬冻害气象指标   总被引：1，自引：0，他引：1  

吉春容  邹陈  陈丛敏  马鸿儒  李新建 《气象科技》2013,41(1):202-206

低温冻害是危害新疆林果业持续健康高效发展的三大灾害之一,通过对越冬期间果树冻害历史灾情资料的调查及最低气温数据库的建立,研究冻害的发生时间、界限温度以及冻害发生年各项气象因子的变化特征,阐明果树越冬冻害与气象因子的关系.结果表明,可根据冬季平均气温、最低气温、降温天气及低温持续时间等确定该区巴旦杏越冬期发生冻害的气象指标.研究结果可为有效防范低温冻害提供理论依据,为林果业生产服务.  相似文献   

太原城市化进程对城市热岛的影响     

李艳红  赵彩萍  李玉琴  周晋红 《气象科技》2013,41(2):360-364

采用城市化的多项要素指标,系统考察了太原1980-2009年期间城市化的发展对其城市热岛效应的影响关系,发现城市化的发展是导致城市热岛效应形成和加剧的主要原因.认为:①近30年,太原市郊区的增温率为0.51℃/10a,市区的增温率为0.90℃/10a,热岛强度的增温率为0.39℃/10a,热岛效应不断增强;②各类城市发展指数与城市热岛效应都有很好的相关关系;③太原城郊温差和总人口对数呈线性相关关系,其长期变化相关系数为0.81;④太原城郊温差和城市房屋建筑面积对数呈线性关系,其长期变化相关系数为0.85.  相似文献   

多普勒天气雷达波束水平距离的计算方法          下载免费PDF全文

易雪婷  邹海波 《气象与减灾研究》2017,40(1):36-42

从球坐标系出发,利用三角形余弦定理和大气折射理论,推导了不作任何近似的、包含地球曲率和大气折射影响的多普勒天气雷达波束水平距离D_m的计算公式,并与斜距投影D_r、地表平面近似的计算公式(不考虑地球曲率和大气折射,记为D_d)和地表球面近似的计算公式(不考虑大气折射,记为D_s)进行了对比分析。结果发现,在标准大气状态下,D_m与D_r在高仰角相差2.5 km以上(D_r大),最高距离差达3.5 km(19.5°仰角最大斜距处);与D_d在低仰角相差0.5 km以上(D_d大),与D_r相差在0.5 km以下(Dm大)。并利用2011—2015年南昌站的探空资料,分析了南昌地区各个季节大气折射的变化情况及其与标准大气的区别。结果显示,夏季南昌上空电磁波的传播受大气折射的影响最大,冬季电磁波受大气折射的影响最小。最后,给出了南昌地区各个季节地球曲率K及等效地球半径Rm与标准大气的订正关系。  相似文献   

A Velocity Dealiasing Scheme for C-band Weather Radar Systems简     

LI Gang  HE Guangxin  Xiaolei ZOU  Peter Sawin RAY 《大气科学进展》2014,31(1):17-26

A dealiasing algorithm for radar radial velocity observed by C-band Doppler radars is presented as an extension of an existing S-band dealiasing algorithm. This has operational significance in that many portable and many commercial broadcast radars, as well as approximately one half of the Chinese weather radar network （CINRAD）, are C-band radars. With a wavelength of about 5 cm, the Nyquist interval of C-band radars is just about one half that of S-band radars （wavelength of about 10 cm） and thus has more velocity folding. The proposed algorithm includes seven modules to remove noisy data, find the starting radials, dealias velocities, and apply least squares error checking in both the radial and azimuth directions. The proposed velocity dealiasing method was applied to one widespread rain case and three strong convective cases from radars operating in China. It was found that, on average, 92.95% of the aliased radial velocity data could be correctly de-aliased by the algorithm, resulting in 96.65% of the data being valid.  相似文献