测井资料在碳酸盐岩洞—裂缝型储层产能评价中的应用

介绍了一种基于测井资料来预测双孔结构碳酸盐岩储层产能的新方法。首先根据碳酸盐岩剖面中双孔结构储层的地质和测井特征,提取与储层产能密切相关的多个测井和地质参数,考虑到这些参数与产能的非线性相关关系以及产能数据的变化特点,采用BP神经网络技术建立其储层产能的预测模型,由此处理了轮南地区的多口井测井资料。所预测的储层段产能与试油产能较为一致,效果良好。     

融入WTO——为农业服务的化工矿产资源发展战略构想

我国直接为农业服务的磷、硫、钾矿资源总体形势不容乐观。针对各自资源特点,应采取不同的发展战略:磷——立足国内,有进有出,南出北进;硫——立足国内,适当进口,调整结构,必要储备;钾——稳定进口,国外开发,国内开发,国内找矿,四位一体,分三步走。为此建议:将磷、硫、钾纳入战略性矿产资源的范畴进行管理和规划;强化地勘队伍,加大找矿力度;增加投入,寻求新的突破;加大“走出去”的步伐;规范进出口秩序;国家在更高的层面进行宏观调控;拓宽为农业服务的新领域。     

进化策略算法在地面沉降量计算参数反演中的应用

多数情况下,评估的研究区缺乏多年积累的地下水位及开采量资料。因此,通常采用土力学模型,根据太沙基固结理论,进行地面沉降量预测。在地面沉降量计算中,土层变形参数值的选取直接影响计算结果的精确性。深层含水层埋深通常大于100m。通过现场勘探,采取土样进行岩土物理力学性质试验获取参数值,成本过于昂贵。通过参考区域土层物理力学性质资料,结合工程经验获取参数值,预测结果的精度得不到保证。针对上述情况,作者提出用非线性优化算法-进化策略算法,根据实测地面沉降量反演土层变形参数值。通过这种方法确定参数值,既节约成本,又保证了计算结果的可靠性。进化策略算法通过模拟生物遗传及进化过程,利用转移概率来帮助指导搜索。搜索结果不依赖于初始点的选择,对于求解全局最优解有很强的鲁棒性。作者将进化策略算法用于某一工程实例土层变形参数的反演,结果表明了该算法的可行性及稳健性,值得在工程实践中推广应用。     

一种海面风场反演的快速风矢量搜索算法

本文以SeaWinds散射计为例，从最大似然估计的海面风场反演方法出发，根据其目标函数的一般分布特征，提出并实现了一种快速风矢量搜索算法。然后采用美国SeaWinds散射计的部分LA实测数据对该搜索算法进行了验证，并与常规算法对同一实验数据的反演偏差及运行时间进行了对比分析，结果表明该算法在能够保证反演精度的前提下，在较大程度上提高了运行效率。     

深部找矿与蒋氏TEM双定源回线装置方案

双定源回线装置的水平场Hx,其强度大、均匀,有利于探测深部陡倾斜金属矿藏,并可用作远距离井中测量的场源。此方案可用于危机矿山的找矿工作。     

新疆及周边国家铜矿产资源战略分析

介绍了世界铜矿床主要类型及其分布特征,并对我国新疆及周边国家铜矿产资源进行调查,结合我国铜资源现状及供需情况分析,说明我国铜矿产资源相对比较贫乏.目前正面临着铜需求快速增长,而铜资源短缺的紧张时期,如何保证铜资源的可持续发展是一个很现实的问题.这就要求我们一方面加强同周边国家和地区的铜矿产资源的开发与合作,另一方面着重勘探与开发我国新疆的铜矿资源.     

Methodological problems of intercultural comparisons of retail environments

The internationalising activities of retailers have tended to precede the theoretical contributions of academics. This is particularly the case for the cultural context within which retail internationalisation takes place. Following an examination of the growth of international retailing activity, the article reviews generic difficulties in studying inter-cultural differences before considering the specific steps which retail practitioners have taken to understand the comparative characteristics of retail and consumer markets through the growth of geodemographic and lifestyle analysis. Finally, we relate one of the most significant integrative intercultural theoretical instruments to the case of retail internationalisation within Western Europe. We find that significant insights into retailer behaviour and strategy can be gained from an understanding of the culturally-specific characteristics of the activity. This revised version was published online in July 2006 with corrections to the Cover Date.     

江苏下扬子区中—古生界的成藏条件及勘探思路

江苏下扬子区的海相中－古生界构造演化经历了前扬子板块、稳定地台和西太平洋活动陆缘等三大阶段。油气地质条件具有多套烃源岩、两类主要储层、四套区域盖层、多种成藏类型和多期成烃等特征。原始生烃量以下古生界为主,下寒武统和下志留统的生烃量约占总生烃量的６０％￣８０％。该领域的勘探应本着“整体评价、区域展开、重点突破”的原则,做到“六个结合”和“五个转变”,加快勘探节奏,重在发现,坚持以下古生界为主,大中型     

旅游地品牌特征塑造初探--以香格里拉旅游品牌为例

香格里拉是一个公共品牌，是系列旅游产品的组合，香格里拉品牌具有鲜明的特征，其特征通过品牌的个性和定位体现，品牌的个性是通过文化性和奇特性表现，信念性是品牌的定位，具体分析了香格里拉品牌的资源本体的脆弱性，旅游产品开发层次较低，品牌崇信度不确定性和品牌定位不准等问题，最后对香格里拉品牌特征的塑造，提出了建议；树立品牌意识，加强品牌管理；加强品牌定位－突出个性，构筑品牌的保护圈，实现品牌特征的接触点。     

Zircon U–Pb age and Hf isotope evidence for contrasting origin of bimodal protoliths for ultrahigh-pressure metamorphic rocks from the Chinese Continental Scientific Drilling project

A combined study of zircon morphology, U–Pb ages and Hf isotopes as well as whole‐rock major and trace elements was carried out for ultrahigh‐pressure (UHP) eclogite and felsic gneiss from the main hole (MH) of the Chinese Continental Scientific Drilling (CCSD) project in the Sulu orogen. The results show contrasting Hf isotope compositions for bimodal UHP metaigneous rocks, pointing to contrasting origins for their protoliths (thus dual‐bimodal compositions). The samples of interest were from two continuous core segments from CCSD MH at depths of 734.21–737.16 m (I) and 929.67–932.86 m (II) respectively. Zircon U–Pb dating for four samples from the two core segments yields two groups of ages at 784 ± 17 and 222 ± 3 Ma, respectively, corresponding to protolith formation during supercontinental rifting and metamorphic growth during continental collision. Although the Triassic UHP metamorphism significantly reset the zircon U–Pb system of UHP rocks, the Hf isotope compositions of igneous zircon can be used to trace their protolith origin. Contrasting types of initial Hf isotope ratios are, respectively, correlated with segments I and II, regardless of their lithochemistry. The first type shows positive ?_Hf(t) values of 7.8 ± 3.1 to 6.0 ± 3.0, with young Hf model age of 1.03 and 1.11 Ga. The second type exhibits negative ?_Hf(t) values of ?6.9 ± 1.6 to ?9.1 ± 1.1, with old Hf model ages of 2.11 and 2.25 Ga. It appears that the UHP rocks from the two segments have protoliths of contrasting origin. Consistent results are also obtained from their trace element compositions suggesting that mid‐Neoproterozoic protoliths of bimodal UHP metaigneous rocks formed during supercontinental rifting at the northern margin of the South China Block. Thus, the first type of bimodal magmatism formed by rapid reworking of juvenile crust, whereas the second type of bimodal magmatism was principally generated by rift anatexis of Paleoproterozoic crust. Melting of orogenic lithosphere has potential to bring about bimodal magmatism with contrasting origins. Because arc–continent collision zones are the best place to accumulate both juvenile and ancient crusts, the contrasting types of bimodal magmatism are proposed to occur in an arc–continent collision orogen during the supercontinental rifting, in response to the attempted breakup of the supercontinent Rodinia at c. 780 Ma.