渤海湾盆地胜海古2潜山古生界储层特征   总被引：1，自引：0，他引：1  

付兆辉  陈发景  高喜龙 《海洋地质与第四纪地质》2008,28(3)

胜海古2潜山是渤海湾盆地埕岛油田北部一个断块型潜山。为分析潜山油藏储层特征、实现潜山高效勘探开发,对胜海古2潜山地层特征、储集空间类型、储集空间特征、储层发育规律和控制因素进行了系统的研究。胜海古2潜山古生界储层主要为次生储集空间,包括晶间孔隙、溶蚀孔洞和裂缝等类型,其中裂缝是储层最重要的储集和渗流空间;胜海古2潜山储层主要发育在冶里—亮甲山组和凤山组;潜山顶部地层和断层附近地层是良好的储层。以上研究结果表明:风化淋滤作用(风化壳)、岩性特征和断裂作用是控制储层发育程度的3个主要因素。这一结论对埕岛油田以及渤海湾盆地潜山勘探开发有借鉴作用。  相似文献   

Juvenile bottlenecks and salinity shape grey mullet assemblages in Mediterranean estuaries     

Luis Cardona  Bernat Hereu  Xavier Torras 《Estuarine, Coastal and Shelf Science》2008

Previous research has suggested that competitive bottlenecks may exist for the Mediterranean grey mullets (Osteichthyes, Mugilidae) at the fry stage with the exotic Cyprinus carpio (Osteichthyes, Cyprinidae) playing a central role. As a consequence, the structure of grey mullet assemblages at later stages is thought to reflect previous competition as well as differences in osmoregulatory skills. This paper tests that hypothesis by examining four predictions about the relative abundance of five grey mullet species in 42 Western Mediterranean estuary sites from three areas (Aiguamolls de l'Empordà, Ebro Delta and Minorca) differing in the salinity level and occurrence of C. carpio. Field data confirmed the predictions as: (1) Liza aurata and Mugil cephalus were scarce everywhere and never dominated the assemblage; (2) Liza saliens dominated the assemblage where the salinity level was higher than 13; (3) Liza ramado always dominated the assemblage where the salinity level was lower than 13 and C. carpio was present; and (4) Chelon labrosus dominated the assemblage only where the salinity level was lower than 13 and C. carpio was absent. The catch per unit effort of C. labrosus of any size was smaller in the presence of C. carpio than where it had not been introduced, which is in agreement with the juvenile competitive bottleneck hypothesis. Discriminant analysis confirmed that the assemblage structure was linked to the salinity level and the occurrence of C. carpio for both early juveniles and late juveniles as well as adults. The data reported here reveal that the structure of grey mullet assemblages inhabiting Mediterranean estuaries is determined by salinity and competitive interactions at the fry stage.  相似文献   

A theoretical analysis of interactive coercing effects between urbanization and eco-environment   总被引：3，自引：0，他引：3  

FANG Chuanglin  WANG Jing 《中国地理科学(英文版)》2013,23(2):147-162

Objectively, a complex interactive coercing relationship exists between urbanization and eco-environment, and the research of this relationship is primarily divided into three schools, i.e., interactive coercion theory, interactive promotion theory and coupling symbiosis theory. Harmonizing the relationship between urbanization and eco-environment is not only an important proposition for the national development plan but also the only way to promote healthy urbanization. Based on an analysis of urbanization process and its relationship with the eco-environment, this article analyzes interactive coercing effects between urbanization and eco-environment from three perspectives of population urbanization, economic urbanization and spatial urbanization, respectively, and analyzes risk effects of the interactive coercion. Further, it shows six basic laws followed by interactive coercion between urbanization and eco-environment, namely, coupling fission law, dynamic hierarchy law, stochastic fluctuation law, non-linear synergetic law, threshold value law and forewarning law, and divides the interactive coercing process into five stages, namely, low-level coordinate, antagonistic, break-in, ameliorative and high-grade coordinate. Based on the geometric derivation, the interactive coercing relationship between urbanization and eco-environment is judged to be non-linear and it can be explained by a double-exponential function formed by the combination of power and exponential functions. Then, the evolutionary types of the interactive coercing relationship are divided into nine ones: rudimentary coordinating, ecology-dominated, synchronal coordinating, urbanization lagging, stepwise break-in, exorbitant urbanization, fragile ecology, rudimentary break-in and unsustainable types. Finally, based on an interactive coercion model, the degree of interactive coercion can be examined, and then, an evolutionary cycle can be divided into four phases, namely rudimentary symbiosis, harmonious development, utmost increasing and spiral type rising. The study results offer a scientific decision-making of healthy urbanization for achieving the goal of eco-environment protection and promoting urbanization.  相似文献   

湖南省2044例原发性支气管肺癌的中医证治规律研究          下载免费PDF全文

陈橙  龚友兰  张博 《应用海洋学学报》2021,37(4):1

目的：探讨原发性支气管肺癌的中医证治规律。方法：选择2014年1月至2018年12月于湖南省中医药研究院附属医院、邵阳市中医医院确诊为原发性支气管肺癌的患者2044 例,导出其病历资料,构建原发性支气管肺癌数据库,采用本课题组研发的医案分析平台进行分析。结果：2044 例肺癌患者中,男1459 例,女585 例;发病年龄集中在50～79岁;主要症状为咳嗽、咳痰、气促、乏力、胸闷;舌脉主要为舌红、苔薄、脉弦细;单一证型主要为毒瘀互结、气阴两亏、肺脾气虚;复合证型主要为气阴两亏、毒瘀互结,肺脾气虚、毒瘀互结,脾虚痰湿、毒瘀互结,气血亏（两）虚、毒瘀互结;主要治则为益气养阴、化瘀解毒、健脾补肺、益气化痰,以扶正固本为主,兼顾祛邪;常用方以肺复方、四君子汤、麦冬汤加减为主;常用中药以益气养阴、健脾祛湿、解毒化痰类为主。结论：本研究总结了2044 例原发性支气管肺癌患者的中医证治规律,对临床具有一定的参考价值。  相似文献   

Development of operating rules for a complex multi-reservoir system by coupling genetic algorithms and network optimization     

N. Lerma  J. Paredes-Arquiola  J. Andreu  A. Solera 《水文科学杂志》2013,58(4):797-812

Abstract

An alternative procedure for assessment of reservoir Operation Rules (ORs) under drought situations is proposed. The definition of ORs for multi-reservoir water resources systems (WRSs) is a topic that has been widely studied by means of optimization and simulation techniques. A traditional approach is to link optimization methods with simulation models. Thus the objective here is to obtain drought ORs for a real and complex WRS: the Júcar River basin in Spain, in which one of the main issues is the resource allocation among agricultural demands in periods of drought. To deal with this problem, a method based on the combined use of genetic algorithms (GA) and network flow optimization (NFO) is presented. The GA used was PIKAIA, which has previously been used in other water resources related fields. This algorithm was linked to the SIMGES simulation model, a part of the AQUATOOL decision support system (DSS). Several tests were developed for defining the parameters of the GA. The optimization of various ORs was analysed with the objective of minimizing short-term and long-term water deficits. The results show that simple ORs produce similar results to more sophisticated ones. The usefulness of this approach in the assessment of ORs for complex multi-reservoir systems is demonstrated.

Citation Lerma, N., Paredes-Arquiola, J., Andreu, J., and Solera, A., 2013. Development of operating rules for a complex multi-reservoir system by coupling genetic algorithms and network optimization. Hydrological Sciences Journal, 58 (4), 797–812.  相似文献   

An experiment on the elevation accuracy improvement of photogrammetrically derived DEM     

Carlos López 《International journal of geographical information science》2013,27(4):361-375

This paper focuses on a topic barely considered in the literature: how to improve the accuracy of a given Digital Elevation Model (DEM) irrespective of its lineage by identifying its most suspicious values (also denoted here as outliers). Methods tailored to a specific procedure and source (contour maps, remote sensing image, etc.) exist but they are not valid for other cases. This is a problem for both the producer and end user. The results of a comparison of two methods using six DEMs intended to be representative of different landscapes are reported here. Both methods have been applied to each DEM, producing a number of height candidates to be analysed. Assuming that all candidates are wrong, their elevations have been blindly replaced by interpolated heights, simulating the behaviour of the inexperienced user. The improved (or degraded) DEMs are then compared against the ground truth, and updated accuracy figures are calculated. The RMSE can diminish by 2 to 8% of the original value by changing less than 1% of the elevations in the dataset.  相似文献   

全国极端气温事件的空间关联模式挖掘研究     

艾贝贝  赵雯华  万幼 《测绘软科学研究》2014,(4):6-12

根据全国739个气象台站1961年1月至2005年12月的逐日气象数据记录建立时空序列数据集,提取极端高温事件和极端低温事件。结合传统关联规则挖掘技术和地理空间数据分析方法,对极端气温事件数据集进行了空间关联模式的分析。实验结果显示,所得空间关联模式中涉及的区域在空间上具有明显的聚集性;在东北、华中两个局部地区的台站中,极端气温事件的发生存在较强的关联规则（支持度阈值6%,置信度阈值95%）,而在其他区域的台站中,极端气温事件不存在类似的关联规则,且极端高温事件的关联规则数量要明显高于极端低温事件。对存在关联规则的台站进行空间分析发现,同一关联规则内的各台站具有空间邻近性,其邻近范围约为200 km。以上空间关联模式的挖掘分析,可以为我国极端气温事件的预警和防控提供有价值的参考。  相似文献   

上海市划定地下水禁限采区范围     

龚士良  吴建中 《上海国土资源》2013,(3)

为进一步控制上海地面沉降,加强地下水管理,上海市人民政府于2013年5月29日发布通知,划定地下水禁采区与限采区范围,并对地下水采灌控制目标与管理措施提出了具体要求。  相似文献   

冕洞的演化规律     

段长春  罗葆荣  曹莹  侯叔明 《天文研究与技术》1997,(2)

本文利用自有冕洞系统观测以来（１９７０－１９９５）的冕洞资料，分析了冕洞的时空分布演化规律，冕洞磁场的演化特征，以及它们与太阳黑子周期的演化关系。得到了一些有意义的新结论。特别是赤道冕洞和极区冕洞与太阳活动周的演化关系具有截然相反的演化规律和不同特征。前者与太阳活动周的演化规律基本一致；后者截然相反  相似文献   

基于元数据和质量规则的土地数据检查   总被引：5，自引：0，他引：5  

方利刘生权  钟耳顺 《地球信息科学学报》2004,6(3):19-23

数据是土地信息系统运转的基础,实施数据检查以产生符合系统需要的数据,是土地信息系统建设的关键环节。目前的土地信息系统工程中,数据检查过程不规范,且无法重用。本文探讨了一种通用的土地数据检查方法,在分析通常的土地数据错误类型的基础上,提出建立元数据库和质量规则实施数据检查的方法。在吉林地籍信息系统空间数据库建设中得到验证,为土地信息系统建设的数据处理提供了良好的解决方案。  相似文献