润滑油馏分加氢工艺中廉价氢气的利用

通过生产试验 ,找出了润滑油馏分加氢脱酸装置合理的新氢纯度和新氢量 ,同时对采用制氢装置供氢、化肥厂弛放氢和催化裂化干气提浓氢三种不同氢源的润滑油生产成本进行了对比分析 ,为在生产中减少制氢装置所产高成本氢气用量 ,利用廉价的氢源找到了依据 ,使加氢脱酸装置吨油氢气成本大为降低。     

二连盆地岩性地层油藏形成条件与油气分布规律

二连盆地具有形成岩性、地层油藏的良好条件。通过对油气成藏条件的综合分析认为,岩性、地层油藏主要沿地层不整合面、最大湖泛面和断面分布;岩性、地层油藏既可以分布在低位体系域,也可以分布在高位体系域;既可以分布在高势区,也可以分布在低势区;在有利的沉积与储集相带内,可以形成富集油藏。因此在地层、岩性油气藏勘探程度很低的二连盆地具有良好的勘探前景。     

大庆探区油气勘探新进展与下步勘探方向

自2000 年1 月1 日大庆油田有限责任公司成立以来,通过深化地质认识、发展勘探技术、创新勘探管理,大庆探区油气勘探取得了历史性新突破。松辽盆地北部岩性油藏精细勘探在葡萄花油层发现3 个5000×104t级目标,新增石油地质储量3.1×108t,在扶杨油层新增石油探明储量4726×104t,发现3 个规模储量后备区;松辽盆地北部深层徐深1 井获得重大发现,徐中火山岩隆起带具有形成1000×108m3 天然气储量规模前景;海拉尔盆地油气勘探取得重大突破,首次提交石油探明储量2009×104t,探明加控制储量达到8229×104t。总结了大庆探区4年来油气勘探取得的主要成果、认识、技术进步及工作经验,阐明了下一步勘探工作的方针、思路、方向和目标。     

Comparison of factor VIII-related antigen and erythrocyte sedimentation rate in outpatient management of vasculitis

Electroimmunodiffusion (Laurell rocket) determinations of factor VIII-related antigen in plasma were ordered to determine the cost/benefit ratio for factor VIII-related antigen as a putative test for endothelial damage in suspected vasculitis. Twenty-seven consecutive patients referred for vasculitis or suspected vasculitis were identified and followed up for an average of 9.1 +/- months (range: one to thirty-three months) in a prospective, unblinded study performed in a clinic, associated with a 1054-bed inner-city university hospital. There was no difference in Westergren erythrocyte sedimentation rate (WESR) in patients with final diagnosis of systemic vasculitis (SV) (38 +/- 12 mm/hour) compared to those without vasculitis (NV) (27 +/- 7) as the final diagnosis. The mean plasma concentration of factor VIII-related antigen was significantly elevated in SV (344 +/- 100%) when compared with NV (147 +/- 39%) (P < 0.016). The factor VIII-related antigen test in this study was 2.56 times more likely (crude odds ratio) than the WESR to contribute to a change in diagnosis or therapy (P = 0.016). Positive and negative predictive values (PPV and NPV) for factor VIII-related antigen (abnormal at greater than 220% of the normal value) were both 70%. PPV and NPV for WESR were 56% and 86%, respectively. The factor VIII-related test was less cost-effective than the WESR in the follow-up period unless it was important to define complete remission or differentiate vasculitis flare from infection. The authors conclude that factor VIII-related antigen is a useful test in the initial diagnosis of vasculitis.     

A network level channel abstraction for multimedia communication inreal-time networks

The design of communication protocols to support guaranteed real-time communication for distributed multimedia systems is examined. A network level abstraction called φ-channel that supports the requirements of real-time applications is proposed. A φ-channel represents a fractional, simplex, end-to-end communication channel between a source and a destination. The channel is characterized by a set of specific performance parameters associated with its traffic. The required performance characteristics of a φ-channel are specified in terms of the packet maximum end-to-end delay and the maximum number of packets that can be sent over that delay. The primary attribute supported by the φ-channel is the on-time reliability. Based on the specified parameters, the underlying delivery system verifies the feasibility of supporting such a channel. The performance of an accepted φ-channel is guaranteed under any conditions, barring hardware failures. The basic scheme that the model uses to verify the feasibility of accepting a φ-channel and the run-time support used to guarantee its performance are described. The results of a simulation experiment implementing the basic functionalities of the proposed scheme are also presented     

Clinical results of meniscus repair in patients 40 years and older

The critical role that the meniscus plays in the knee along with the advantages of preserving as much of the meniscus as possible have both been well documented. Whenever possible, meniscus repair has become the procedure of choice for treatment of meniscal tears. However, some researchers have reported less favorable results in older patients. To determine the results of meniscus repair in older patients, patients 40 years and older who underwent arthroscopically assisted meniscus repair were prospectively followed up. Thirty-seven patients were included in the study, all of which had a minimum 2-year follow-up (average, 26.5 months). The average age of the patients at the time of the repair was 44.2 years (range, 40 to 52 years); 26 were males and 11 were females. There were 19 left knees and 18 right knees included in the study. Twenty-two patients had associated anterior cruciate ligament reconstructions. Physical examination at follow-up included swelling, joint line tenderness, locking, and McMurray testing and radiographs. Five of 37 menisci repaired (13.5%) were symptomatic at latest follow-up. All of these patients had joint line tenderness and two had a positive McMurray test. Three of these patients had repeat arthroscopy confirming that the meniscus had not healed. Because of the small number of patients with symptoms at follow-up, the authors feel that meniscus repair in patients 40 years and older is an effective treatment for peripherally located meniscus tears. With 86.5% of the patients having good clinical results, these findings are comparable with other studies with a younger population and signify that repair of peripheral tears is indicated in this age group especially in conjunction with anterior cruciate ligament reconstruction. The findings suggest that the location and meniscal tear, rather than the age of the patient, determine the potential for successful repair.