室内实验规模的出砂数学模拟

为了研究疏松砂岩的出砂特征,根据连续性孔隙介质渗流、微粒释放和微粒运移理论,建立了室内实验规模的出砂数学模型,并采用有限差分法对该模型进行了求解。结果表明,实验条件下数学模拟与物理实验模拟的结果吻合较好。用理论出砂模型模拟了胶体力、水动力导致的出砂和砂粒运移过程中滞留引起的渗透率变化。模拟结果表明,渗流速度高于临界流速才引起冲刷出砂;胶体力和冲刷力是出砂的诱发因素,砂微粒在运移过程中在孔隙表面再沉积和孔喉处被捕集将降低出砂程度;渗透率比值与注水孔隙体积倍数或渗流速度的关系曲线均呈"S"形;在运移过程中,砂微粒滞留导致渗透率比值随岩心长度的变化呈线性降低趋势。     

转变观念发展高职

本文针对中专升格的高职学院,运用系统的观点,探讨转变办学观念的载体,提出发展高职“五制”的技术内涵。     

潜空导弹运载器水下弹道仿真研究

在建立适合于运载器六自由度运动的数学模型的基础上,建立了光纤对运载器作用力的数学模型,然后对潜空导弹运载器的水下弹道进行了仿真研究.结果表明运载器运动稳定,控制规律合理.     

深圳港液化天然气船航行安全风险评估

对中国第一座海运LNG接收站LNG船航行安全进行了安全评估.采用美国海岸警卫队的《基于风险的决策指南(RBDM)》中的预先风险评估方法(PrRA),使用了事件树方法和风险指数方法.根据ALARP原理,评估出三种情景属于需改进的范围,针对评宿结果提出了五条减少风险水平的建议.     

子洲地区山西组及盒8段有利砂体成因探讨

目的为了查明鄂尔多斯盆地东部子洲地区山西组及盒8段有利砂体的特征及成因,进而寻找有利砂体及高产天然气聚集区。方法采用野外观察与室内研究相结合的方法。结果大量的砂岩样品统计显示,山西组砂岩类型以岩屑砂岩、石英砂岩为主,其次为岩屑石英砂岩,盒8段砂岩主要为岩屑砂岩、岩屑石英砂岩;不同类型的砂岩物性不同,石英砂岩物性最好,其次是岩屑石英砂岩,岩屑砂岩物性最差;沉积相分析认为,子洲地区山西组主要为三角洲前缘,盒8段发育辫状河三角洲前缘,探明了重点气层组山23及盒82沉积微相的平面展布。结论有利的天然气储集体主要形成于水下分流河道微相,由于山西组和盒8段形成时古地理条件的不同,其砂体类型及储集性能也有一定的差异。     

Multi-objective carrier chaotic evolutionary algorithm for DNA sequences design

DNA computing is a new vista of computation, which is of biochemical type. Since each piece of information is encoded in biological sequences, their design is crucial for successful DNA computation. DNA sequence design is involved with a number of design criteria, which is difficult to be solved by the traditional optimization methods. In this paper, the multi-objective carrier chaotic evolution algorithm (MCCEA) is introduced to solve the DNA sequence design problem. By merging the chaotic search base on power function carrier, a set of good DNA sequences are generated. Furthermore, the simulation results show the efficiency of our method.     

Dialdehyde starch nanoparticles： Preparation and application in drub carrier

Dialdehyde starch nanoparticles (DASNP) were prepared by the redox reaction of NaIO4 and starch in water-in-oil microemulsion. IR spectrum showed that DASNP had aldehyde groups, and quantitative alkali consumption showed that its dialdehyde content was about (50±5)%. The average diameter of DASNP determined by SEM was about 100 nm. TGA-DTA showed that its thermal stability was better than starch nanoparticle (StNP) and dialdehyde starch (DAS). Its low biological toxicity was detected by cell experiment. Also the best mass ratio of doxorubicin (DOX) to combined DASNP detected by UV-VIS was 15 : 1, and the product was effective for controlled release of DOX. The cell experiment showed that the drug-carrier particle (DOX-DASNP) can release DOX for a long time and strengthened the effect of the anticancer drug. This work demonstrates that the DASNP, which has good thermal stability, small particle size, low biological toxicity, and slowly anticancer drug-releasing to strengthen drug effect, is a potentially useful carrier for anticancer drug.     

乌五井区克拉玛依组油藏开发效果分析

目的提高乌5井区克拉玛依组油藏注水开发效果。方法在充分认识油藏静态地质特征的基础上,利用压力测试、油井产液剖面、注水井吸水剖面等测试结果,结合注水井和采油井生产数据的动态分析,认识各种地质及生产动态因素对注水效果的影响和控制作用。结果注入水在地质上主要受构造、沉积微相和储层物性3方面控制,工程上主要受注水时机、注水方式和注水强度的影响。结论有益的为开发同类油藏提供了该研究经验和借鉴。     

住宅小区智能控制与管理系统

介绍了一种住宅小区智能控制与管理系统的网络结构及其实现，在此系统中，家庭自动化系统采用有线电缆与电力线载波通信相结合的机制；家庭自动化系统与大楼集中控制站之间的通信通过RS485实现；大楼集中控制站、公用设施控制站与小区中央控制站之间的通信通过LONWORKS局部操作网实现。     

有关改变教学方式的苦干问题析论

对从根本上改变现有的教学方式的必要性做了简要的说明；对长期以来导致教学方式几乎没有根本的改变的原因进行了分析论述；提出了新的教学方式构想以及为实现这一构想所应做的事情。