P2P网络传输策略研究

由于Peer-to-Peer系统在文件传输与共享领域有着巨大的优势和良好的应用前景,Peer-to-Peer文件传输问题已成为目前学术界的重点研究问题之一。本文提出了一种分区优先传输的算法,经过优化后的Peer-to-Peer文件传输其在网络主干上的流量可与组播相比拟,高效利用网络资源,为其他的互联网应用留下更多的带宽。     

Fluid-Induced Seismicity: Theory, Modeling, and Applications

Operations including borehole fluid injections are typical for exploration and development of hydrocarbon or geothermic reservoirs. Microseismicity occurring during such operations has a large potential for understanding physics of the seismogenic process as well as in obtaining detailed information about reservoirs at locations as far as several kilometers from boreholes. We propose that the phenomenon of microseismicity triggering by borehole fluid injections is related to the process of the Frenkel–Biot slow wave propagation. In the low-frequency range (hours or days of fluid injection durations) this process reduces to the pore-pressure diffusion. We search for diffusion-related features of induced microseismicity. Two types of such signatures are considered. The first one is related to the geometry of microseismic clouds. Another type of signature is related to the probability of microearthquakes. On this basis we introduce a concept for interpretation of microseismic data which provides a possibility to infer information about hydraulic properties of rocks. Such information can be of significant importance for industrial applications and for understanding physical properties of geological structures.     

磷灰石及其流体包体的SRXRF分析

采用同步辐射X荧光技术对格尔柯金矿花岗闪长岩中的副矿物——磷灰石进行了分析。磷灰石成分分析显示原始岩浆属铁镁质Ⅰ型花岗岩，具有富集轻稀土、Nd消耗的特征，流体包体成分分析显示岩浆热液中含有Fe、Mn和微量的As、Co、Zn。     

G105钻杆腐蚀失效分析

采用金相分析并结合X射线衍射、扫描电镜和电子探针能谱分析等方法，分析了某油田G105钻杆的腐蚀失效原因。结果表明，因腐蚀产物脱落造成井下堵水眼事故，而钻杆停钻后因未及时清理泥浆而造成钻杆内表面附着泥浆，含有氯离子的泥浆加速了其对钻杆的氧腐蚀。就停钻腐蚀问题提出了预防措施。     

圆管临界热流密度的流体模化

为了评价现有的临界热流密度(CHF)流体模化技术,在氟里昂-12热工实验装置上完成了φ202.5圆管CHF实验。在此基础上,用不同的数据源,比较了Ahmad补偿失真模型、鲁钟琪模型、Groeneveld模型和Stevens-Kirby经验比例因子模型的预测精度和适用范围,为复杂流道中的CHF流体模化研究奠定了基础。     

压裂增产措施在安塞油田坪北区特低渗透油藏的应用

针对安塞油田坪北区低孔隙度、特低渗透率、低含油饱和度、低压、低温、浅层低产岩性的油藏特点,优选出适应低温压裂液、裂缝支撑半径为160m、前置液为15%～20%、平均砂液比为35%～40%、加砂程序15%—25%—35%—45%—55%,压裂施工成功率为99.4%,充分挖掘了油层潜力,增产效果显著。     

基于模糊模型的工业过程稳态优化控制方法

本文提出了一种解决复杂非线性工业过程的稳态优化控制方法，对过程建立模糊模型，用自相关函数检验法验证模型的正确性，用改进的遗传算法实现稳态优化计算，并以一炼油厂催化裂化实际生产过程的稳态数据进行试验，结果说明该方法的正确性。     

基于流随机Petri网模型的可重入生产线稳定性分析

可重入生产线是作为芯片制造生产线模型被研究的，其特点是具有“可重入性”。该文基于流随机Petri网(Fluid Stochastic Petri Net,FSPN)对可重入生产线进行建模，并得到了一些相关的稳定性结论。     

Massively parallel implementation of the mesoscale compressible community model

Computational fluid dynamics and meteorology in particular are among the major consumers of high performance computer technology. The next generation of atmospheric models will be capable of representing fluid flow phenomena at very small scales in the atmosphere. The mesoscale compressible community (MC2) model represents one of the first successful applications of a semi-implicit, semi-Lagrangian scheme to integrate the compressible governing equations for atmospheric flow in a limited area domain. A distributed-memory SPMD implementation of the MC2 model is described and the convergence rates of various parallel preconditioners for a Krylov type GMRES elliptic solver are reported. Parallel performance of the model on the Cray T3E MPP and NEC SX-4/32 SMP is also presented.     

催化裂化装置反应再生工段动态仿真培训系统

以安庆石化总厂炼油厂催化装置反应再生过程为具体对象 ,根据反应机理和现场操作数据 ,建立了系统的动态数学模型 ,开发了仿真培训系统并成功地应用于操作工人的培训。同时 ,介绍了系统的功能、仿真数学模型及应用效果