松辽盆地头台油田储层裂缝参数发育特征研究

本文从对岩心中裂缝的观察入手,经过对岩心节理走向的古地磁定位分析,总结了松辽盆地头台油田扶余油层储层裂缝的空间展布特征。同时,运用纵波波速的比值－“龟裂系数”方法对扶余油层储层的裂缝发育频率进行了分析、计算。结论表明,头台油田储层的裂缝极为发育,裂缝参数特征必然影响油田生产。     

EXPERIMENTAL RESEARCH OF EQUILIBRIUM AND NONEQUILIBRIUM DYNAMIC ADSORPTION OF Cd~(++) IN SOIL--EFFECT OF DIFFERENT ACIDITIES AND SATURATION

This paper studies water and solute transport in soil. It mainly deals with theadsorption behavior of heavy metal Cd~(++) in soil at different P~H values and the dynamic charac-ters of adsorption process in unsaturated state. Through theoretical analysis and experimental re-search, the adsorption isotherm and the equations of dynamic adsorption in saturated and unsatu-rated states are proposed.     

井口原油三相自动计量技术的应用

井口原油的两相分离计量能满足油田开发初期的生产要求,油田进入中高含水期后,两相分离计量技术逐渐暴露出许多与生产和技术进步不相适应的问题亟待解决。本文通过对中原油田计量现状的分析,提出了在计量站应用三相分离计量和自动化控制的技术路线,利用计算机和无线通讯技术,在新建的计量站上实现自动化计量和控制。     

Inhibition of intimal hyperplasia after vein grafting by in vivo transfer of human senescent cell-derived inhibitor-1 gene

OBJECTIVE: To define the distribution and determinants of cardiovascular disease events among participants undergoing long-term antihypertensive therapy, and to stratify them into risk groups on the basis of pretreatment clinical profiles. DESIGN: A prospective cohort study of participants in a worksite-based antihypertensive treatment program in New York city (1973-1994). PATIENTS: We studied 8690 systematically treated patients who had at least 6 months of follow-up (average of 5.7 years) and, at entry, had had a systolic blood pressure of > or = 160 mmHg or a diastolic blood pressure of > or = 95 mmHg (after 1992 > or = 140/90 mmHg), or had been being administered antihypertensive medication. MAIN OUTCOME MEASURES: Blood pressure and incidence of morbid and mortal cardiovascular events. RESULTS: Blood pressure control (to 140 +/- 3/87 +/- 7 mmHg) was achieved by the first year and maintained through 18 years of therapy. In nearly 50,000 person-years of follow-up, there were 468 cardiovascular disease events [myocardial infarction including revascularization (282), strokes (93), congestive heart failure (30) and other cardiovascular deaths (63)]. Deaths from cardiovascular disease events accounted for 68% of all deaths. Myocardial infarction was most common throughout, but congestive heart failure incidence surpassed stroke incidence after 10 years. A scheme for risk stratification was constructed after analysis of the independent association of baseline factors and incident cardiovascular events. Upon the basis of ease of ascertainment and their demonstrated associations with occurrence of cardiovascular disease during treatment, we selected five pretreatment factors (history of heart attack, stroke, diabetes, age > or = 55 years and pulse pressure > or = 60 mmHg) to stratify patients into four groups. Those with no risk factor had a low risk (n=2999), those with one had a moderate risk (3042), those with two had a high risk (2237), and those with three or more had a very high risk (412). Overall, the unadjusted rates of incidence of cardiovascular disease events per 1000 person-years for patients in very high and low risk groups differed by factors of six and 14 for men and women, respectively. CONCLUSION: These results demonstrate that long-term control of blood pressure can be achieved in a general population. Nevertheless, cardiovascular disease events still accounted for most morbidity and mortality among these 'recovered' hypertensive patients. At entry, on the basis of readily identifiable characteristics, it was possible to stratify patients according to likelihood of subsequent events occurring despite control of blood pressure. This scheme could provide the basis for targeting more aggressive therapy where the potential for further cardioprotection is greatest.     

离子轰击模拟中子辐照在核材料研究中的应用

简要综述了离子轰击模拟中子辐照对材料，尤其是对堆用Ｚｒ合金的结构和性能影响的相关性，方法特点和研究。讨论了离子品种，能量，辐照剂量，束流密度和温度等实验参量的选择及其对材料组织，结构，力学和耐腐蚀性能等的影响。离子轰击模拟堆内中子辐照研究核材料是１种具有成熟理论体系，高效，安全和经济的好方法。     

阴极电弧沉积多元合金膜层的织构及其形成

采用阴极电弧沉积方法，制备了与靶材成分基本相同的多元合金Inconel625膜层[1]。用XRD，SEM，TEM研究了不同入射角下所获膜层中的织构分布及其成因。     

承钢高炉寿命的现状及延长寿命的对策

分析了承钢高炉寿命短的原因，并根据高炉冶炼钒钛矿的特点，提出了延长高炉寿命的对策。     

中型无油超高真空防冷焊评价试验设备的研制

介绍了设计原则、实现途径和极限真空估算。概述了设备特点和测试结果，并与国内外情况进行了比较。     

激光合成新型线性NTC热敏电阻材料

本文采用CO2激光器作热源合成了Al2O3-WO3系热敏电阻材料,该材料具有负的温度系数,在一定温区内阻温特性呈线性变化。并对材料的导电机理进行了初步探讨。