中国江南先秦时期人类活动与环境变化

从江南先秦时期不同阶段内遗址内涵和位置的变化着手,分析江南人类活动与环境变迁的关系,探索江南先秦文化遗址中文化层年代不连续的原因,找提出江南先秦文化中心变迁的路径。江南先民是从适应自然走向改造自然道路的,由于认识和改造自然的能力有限,江南土著文化随自然条件发生兴衰,而这种兴衰又成为土著文化相互渗透和交融的动力。     

曙光4000A上三维叠前深度偏移并行计算的应用设计

波动方程叠前深度偏移在地震勘探成像处理方面起着不可替代的作用。随着高性能大规模并行计算机技术的发展,波动方程叠前深度偏移计算在地震勘探中的应用有了很大进步。在波动方程叠前深度偏移处理中,庞大的数据规模与海量计算对计算性能提出了很高的要求。曙光4000A超级计算机系统是我国目前峰值速度最快的商用超级计算机系统,无论是硬件平台建设还是应用软件的配置方面,都具有良好的应用性能。基于该系统设计的三维波动方程叠前深度偏移(炮域)PSDM软件,采用动态负载平衡并行计算模式,具有较高的计算效率,高度的可扩展性和可靠性。     

曙光雷达数据处理软件系统

针对岩土工程探测对象的隐蔽性与复杂性,开发了曙光雷达数据处理软件系统,实现了不同类型雷达数据的共享数据处理、分形处理、偏移、联合反演、小波变换等功能;现场验证及试用结果表明,该软件系统可以改善地下目的物探测的分辨率和真实度,可为岩土工程施工提供较准确的地下障碍物资料。     

迁入性亚洲飞蝗与气象因子关系的研究

通过对吉木乃1994—2004年7、8月份02、08、14、20时地面风向、风速的分析,以及对下列气象资料的分析,如(1)飞蝗迁飞时段的风向、风速;(2)1971—2004年吉木乃站冬季、春季、夏季的月平均气温、月降水量;(3)后冬≤3cm积雪深度初日日期;(4)近10a4—8月的月平均相对湿度等,初步探讨了对亚洲飞蝗迁飞、蝗卵安全越冬、孵化繁衍监测有指导意义的气象因子,结果表明:进入90年代以来,吉木乃的气候变化适于亚洲飞蝗的孵化繁衍。     

CGP叠加柱面波偏移成像方法

针对松辽盆地薄砂层油藏的地震勘探问题,提出了一种共检波器接收点(CGP)叠加柱面波偏移成像方法。该方法对小炮点距、小检波器点距、中间放炮观测系统采集地震资料,经CGP道集叠加组合成柱面波剖面;采用下行波射线法向下延拓和上行波波动方程向下延拓的方法,使柱面波剖面偏移成像。通过模型分析和对松辽盆地TK8157测线资料进行处理证明该方法的地震分辨率和保真度较高,在发现小砂体、小断层、地层尖灭等方面有较好的效果。     

对企业会计信息失真现象的探讨

针对企业会计信息失真的一些现象，分析了产生原因，阐述了给国家、社会甚至企业自身带来的危害性，并提出了建立惩处机制，监督约束机制，推行会计委派制，完善会计监督体系，提高职业道德等相应的治理建议。     

构造应力场、流体势场对柴达木盆地西部油气运聚的控制作用

运用多孔介质渗流理论和构造应力场驱动油气运移的流固耦合分析方法对柴达木盆地西部的构造应力场及流体运移势进行了数值模拟,揭示盆地西部油气运聚的规律是:①区域主要构造格架或构造体系控制了构造压力低值区的展布,二级构造压力低值区的边界为近南北和北北东向;②由浅层向深层,构造压力低值区的范围有逐渐扩大的趋势;③盆地西南部油区棋盘格式构造的结点为构造压力低值区;④不同构造层油气流矢量聚集区往往都是构造压力的低值区和油气聚集的有利部位.     

The community morphology of skilled migration: the changing role of voluntary and community organisations (VCOs) in the grounding of British migrant identities in Paris (France)

Research into skilled migrant communities tends to emphasize the grounding of identities through transnationalism and mobility. Less research has been conducted into how skilled migrants actually ground their identities within the city through everyday social networks. The paper addresses this imbalance by examining the changing significance of British voluntary and community organisations (VCOs) in Paris, France. Combining qualitative and quantitative data, findings show local migrant networks to be important focal points for the British even though migrants’ lives may increasingly be transnational in orientation. The research also shows that in situ social networks are evolving. Specifically, traditional forms of elite expatriate communality are not as omnipotent as they once were, with the popularity of some high-profile British VCOs in Paris declining over recent decades. The paper argues that the link between social dynamism and communal morphology helps explain this shift: as British middle-class lifestyles have fragmented, and as the British migrant population in Paris has grown in scale and scope, so the range of VCOs and associated informal networks has grown. Whilst some skilled migrants still embed within traditional expatriate organisations, Britishness is increasingly grounded elsewhere; both within the city through alternative social networks, and located beyond the city through transnational ties.     

南海北部莺歌海盆地壳源型非生物CO2运聚成藏特征与资源潜力

南海北部莺歌海盆地壳源型非生物(无机)成因CO2运聚成藏机制独特、分布规律复杂、资源规模及潜力巨大,根据目前勘探及研究程度,其CO2资源量逾万亿立方米,勘探所获地质储量超过2000亿m3,居中国探明CO2地质储量之首,在世界范围亦是罕见的,故具有颇大的资源潜力与综合开发利用前景。CO2具明显的多重性,其不仅能广泛应用于国民经济及工农业生产中,而且是导致"厄尔尼诺"现象,严重影响生态环境的主要温室气体,因此,如何综合开发利用这种储量规模巨大的CO2资源,充分发挥其市场经济价值,促进国家经济建设,这是目前该区天然气勘探开发面临的重大科技攻关课题。     

Experiments on the primary migration of oil from source rocks

Simulation experiments on the primary migration of oil were carried out on massive samples. The results proved that oil generated from source rocks was expelled in the form of an independent oil phase. High oil-expulsion efficiency was observed. It follows that the primary migration of oil is not directly dependent on the quantity of oil generated from the source rocks. Therefore, the oil-expulsion proportion was high though some source rocks yielded only a limited amount of oil. A great deal of gas was produced at the same time of oil-generation. Thus, it can be concluded that the main expulsion energy for oil primary migration came from these gases.