An Experimental Investigation of Static Properties of Bio-Oils and SAE40 Oil in Journal Bearing Applications

Considerable research has been conducted in the past decade and a half regarding the bio-lubricants potential to replace mineral-based lubricants as mainstream lubricants such as engine oil, hydraulic oil, compressor oil, and metalworking oil. This study studied several bio-lubricants (rapeseed oil, palm olein, and soybean oil) and a mineral-based lubricant, SAE40. The bio-lubricants have better physiochemical, tribological characteristics and environmental friendly nature, and are promising to replace mineral-based lubricants. In this study, a journal bearing test rig (JBTR) was developed in order to investigate the effect of journal speed on the temperature of oil film with time. Additionally, the load-carrying capacity of bio-oils was tested against the mineral-based lubricant SAE40 by adding a load on the journal. For all three speeds, i.e., 1000, 1500, and 2000 rpm, the bio-lubricants recorded minimum temperature. At 1000 rpm, rapeseed oil recorded a 9.2% lower temperature than SAE40. Similarly, at 2000 rpm, rapeseed oil recorded a minimum temperature that was 2.5% lower than SAE40; in comparison, at 1500 rpm, palm olein recorded a minimum temperature that was 1.8% less than SAE40. Overall, the results of this study revealed that bio-oils recorded a lower temperature rise than mineral oil. These results are very encouraging for further research in this area.     

论文被引频次学科领域百分位在创建期刊百分位数指标中的应用

【目的】 探讨基于InCites数据库中论文被引频次百分位创建期刊百分位数指标的方法,比较不同百分位数指标的期刊评价效果。【方法】 以2018年版JCR中多学科交叉科学期刊及其2017—2018年发表的论文为研究对象,根据InCites数据库中论文被引频次学科领域百分位(Percentile in Subject Area,PSA)创建期刊百分位数指标(Journal Indicator of Percentage Rank,JIPR),包括JIPR4、JIPR6、JIPR8、JIPR10、JIPR100和平均PSA(aPSA),比较不同JIPR对多学科交叉科学期刊的评价效果。【结果】 68种期刊的JIPR4呈偏态分布,其他JIPR呈正态分布,多数指标之间呈高度相关,不同等级JIPR之间相关度更高;影响因子与aPSA排序位次变化较大的期刊多是发表综述文献较多、单篇高被引论文对影响因子贡献较大的期刊。【结论】 与影响因子相比,多数JIPR有明显优势,其中aPSA可能是最理想的期刊评价指标。     

肿瘤类期刊退稿原因分析

全文分析2006年《中国癌症杂志》所退稿件的主要退稿原因,并根据退稿原因给出一些建议,以期帮助作者更有效地撰稿及投稿。     

《药物分析杂志》2000-2005年载文被引分析研究

分析《药物分析杂志》2000～2005年发表论文的被引情况,以评价该刊的学术价值和载文质量。利用中国知识资源总库(China National Knowledge Internet,CNKI)中的中国引文数据库进行数据采集,结果显示该刊2000～2005年,共载文1415篇,其中852篇被 CNKI 来源期刊引用3514次,占刊出论文的60.21%,单篇平均被引次数为4.12次,单篇被引5次以上的论文占28.53%,单篇被引最高次数为43次。该刊载文质量较高,载文的连续性和稳定性较好,是药物分析领域内水平较高的专业性学术期刊。     

创新办刊机制力争做大做强--《医疗卫生装备》五年办刊实践与展望

《医疗卫生装备》杂志自2001年机构改制以来,坚持以质量建设为中心,不断强化品牌意识、服务意识,不断提升刊物质量,拓宽办刊范围,实现了军事效益、社会效益和经济效益的全面提升.回顾了《医疗卫生装备》杂志5年来的办刊发展历程,探索了其未来发展前景,对加快期刊发展,落实新的奋斗目标,有一定的参考作用.     

LH750/GENS五分类血球计数仪稀释液液面低报警故障检修

介绍了贝克曼库尔特LH750/GENS五分类血球计数仪反冲罐中的稀释液液面低报警的故障分析和排除方法。     

THE ROLE OF THE JOURNAL CLUB IN SURGICAL TRAINING

Background : The development of skills in critical appraisal of the medical literature is an important aspect of surgical training. Methods : At the Prince of Wales Hospital a journal club has been conducted for more than 5 years to improve the registrars' training in this area. A questionnaire was circulated regarding the success of the journal club at achieving adequate review of the important current literature, development of critical appraisal skills by registrars and providing a convivial social gathering. Results : A total of 28 out of 39 current or previous journal club members responded to the questionnaire. Twenty-three of the respondents felt that the journal club provided a good to excellent review of current literature, 26 felt that the journal club facilitated development of critical appraisal skills and all 28 said that the journal club was a convivial social forum. Eight research projects developed from journal club reviews, 19 of the respondents reported that their clinical practice had changed, and 19 had been stimulated to further review a topic as a result of the journal club. Many of the respondents had specific criticisms of the journal club, and these have been used to improve the journal club format. Conclusions : The present study has highlighted the strengths and weaknesses of our journal club. The journal club is a valuable component of surgical education.     

Research reports on treatments for bipolar disorder: preliminary assessment of methodological quality

OBJECTIVE: To assess frequencies of types of publications about bipolar disorder (BD) and evaluate methodological quality of treatment studies. METHOD: We classified 100 randomly selected articles (1998-2002) from five psychiatric journals with highest impact ratings, by topic areas, and assessed methods employed in treatment studies. RESULTS: Topics ranked: treatment (41%; 37% on pharmacotherapy) > biology (31%) > psychopathology (14%) = miscellaneous (14%). Of treatment studies, only 19% of original articles were randomized, 15% were relatively large (n > or = 50) but non-randomized, 65% were small non-randomized, case-series or -reports, and 53% relied on baseline-to-endpoint contrasts without a control group. Patient dropout rates were > or =40% in 43% of prospective studies. Only two reports provided confidence intervals; one included a power analysis, and 53% included no references on study design or statistical methods. CONCLUSION: Even in highly respected journals, the typical methodological quality of recent reports on therapeutics for BD was unexpectedly limited, and psychopathology and psychotherapies were little studied.     

《中国计划生育学杂志》创刊15年学术论文作者群分析

目的:通过对《中国计划生育学杂志》创刊以来学术论文作者、地区、机构分布情况的统计分析,了解科技人员合作类型及特点、核心作者及高产机构,为客观评价我国计划生育科技队伍现状提供科学依据。方法:对1992～2006年学术论文进行文献计量学统计分析。结果:15年来发文2998篇,论文合作度为3.15,合作率为74.75%;仅发表1篇论文作者1987人;核心作者55人,发文331篇。发文主要集中在中部及沿海发达地区,北京地区发文355篇,居第1位;发文在20篇以上高产机构15个;计划生育系统科研院(所)及技术指导中心发文728篇(24.28%),技术服务机构1069篇(35.66%);妇幼卫生机构584篇(19.48%),医学院校及附属医院417篇(13.91%),科研机构114篇(3.60%)。在全国计划生育科研院(所)中,国家人口计生委科研所、上海市计划生育科研所发文量最多。结论:该刊论文作者分布广泛,拥有一支实力雄厚、对刊物影响力较大、造诣较深的活跃核心作者。但论文合作程度不高,各地区计划生育科技研究力量分布极不均衡,提示特别应加强西北部及东北部地区的科研力量培养和关注。     

《中国药科大学学报》评价与分析比较

利用2001~2006年版《中国科技期刊引证报告》提供的各项评价数据对《中国药科大学学报》进行了统计分析和比较,运用单一指标评价法进行了横向和纵向比较和分析,同时对综合指标评价中相关计量指标进行了对比评估。结果表明:《中国药科大学学报》在药学学术期刊中占有重要地位,影响因子和被引频次在2001~2006年内始终处于前10位。