oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 39 )

2018 ( 900 )

2017 ( 995 )

2016 ( 1010 )

Custom range...

Search Results: 1 - 10 of 44734 matches for " 方松 "
All listed articles are free for downloading (OA Articles)
Page 1 /44734
Display every page Item
国家创新体系的信息消费市场研究

图书情报工作 , 2001,
Abstract: ?对国家创新体系的信息消费市场做了界定与细分,探讨市场运行的供求机制、价格机制和政府管理、法律保护体系等问题,并对如何完善国家创新体系的信息消费市场提出对策。
血管组织工程的发展现状和趋势
,
- , 2016,
Abstract: 心脑血管疾病是全球发病率和死亡率最高的疾病,其主要病因是动脉粥样硬化。临床上主要采用血管移植物重建病损血管,人造合成血管在大口径血管修复中取得了满意的效果,但在小口径血管修复中效果并不理想。近30年来,血管组织工程发展极其迅速,从再生的角度为血管修复提供了新的途径。本文综述血管组织工程的最新进展(体外、体内、原位血管组织工程),并对未来发展趋势进行了前瞻性展望。
Cardiovascular diseases such as atherosclerosis remain the leading cause of morbidity and mortality in the world. The replacement of large diameter vessels (≥6 mm), such as the aorta, has been performed successfully with synthetic non-degradable vascular grafts, while it is still a challenge to engineer small diameter vessels with long-term patency. Over the past three decades, the rapid progress in the field of vascular tissue engineering has provided some promising approaches, including in vitro, in vivo, and in situ tissue engineering of vascular grafts. This review is focused on the most recent progress and trends in vascular tissue engineering.
桑叶超微粉奶茶降脂功效的评价

- , 2017, DOI: 10.13982/j.mfst.1673-9078.2017.12.004
Abstract: 本文研究了桑叶超微粉奶茶的降血脂作用,为辅助降糖、降血脂保健食品的研发提供参考。采用四氧嘧啶造糖尿病小鼠模型,给造模成功小鼠灌胃不同剂量的桑叶超微粉奶茶,探讨桑叶超微粉奶茶对糖尿病小鼠体重的影响,同时测定小鼠血清的相关血脂指标。结果显示,喂饲桑叶超微粉奶茶后糖尿病小鼠体重增长缓慢症状得到有效改善,雌鼠和雄鼠体重增长率达37.11%和40.99%;灌胃不同剂量的桑叶超微粉奶茶后,糖尿病小鼠的TC、TG和LDL-C值均显著降低,下降率分别可达到17.52%,48.13%,2.47%,HDL-C值升高46.81%。表明桑叶超微粉奶茶具有缓解糖尿病小鼠体重消瘦症状的作用,桑叶超微粉奶茶具有一定的辅助降血脂作用,桑叶超微粉奶茶对不同性别糖尿病小鼠降血脂的作用机制、最佳摄入量还有待进一步研究,期望本研究能够为相关保健食品的开发提供参考建议。
In this study, the hypolipidemic effect of mulberry leaf ultrafine milk tea was investigated to provide reference for the research and development of hypoglycemic and hypolipidemic health food. The effect of mulberry leaf ultrafine milk tea on the body weight and serum lipid related indicators of diabetic mice were investigated by intragastric administration of mulberry leaf ultrafine milk tea with different dosages to the diabetic mice modeled by alloxan. The results showed that the slow growth of body weight in diabetic mice was significantly improved after the feeding of mulberry leaf ultrafine milk tea, and the weight growth rates of female mice and male mice were 37.11% and 40.99%, respectively. After oral administration of the mulberry leaf ultrafine milk tea with different dosages, the levels of total cholesterol (TC), triglyceride (TG) and low density lipoprotein cholesterol (LDL-C) in diabetic mice were significantly decreased by 17.52%, 48.13% and 2.47% respectively, and the high density lipoprotein cholesterol (HDL-C) level was increased by 46.81%. The results showed that mulberry leaf ultrafine milk tea could alleviate the weight loss symptoms of diabetic mice, and the mulberry leaf ultrafine milk tea had certain hypolipidemic effect. The mechanism of hypoglycemic effect of mulberry leaves superfine milk tea on diabetic mice of different genders and the best intake remain to be further research, and it is expected that the study will be able to provide reference for the development of related health food.
工程振动理论概述
同陈
力学进展 , 1973, DOI: 10.6052/1000-0992-1973-3-J1973-033
Abstract: 工程振动理论是一门技术科学。它研究工程技术中发生的各种振动问题。它借助于数学、力学、实验和计算技术,探讨各种振动现象的机理,设法克服振动引起的消极因素,利用其积极因素,合理地解决各种工程问题。振动引起的消极方面有1.振动使结构物或机器产生大变形破坏或疲劳损坏。2.振动使机器或仪器丧失功能。3.振动产生强刺激,形成公害。
Si3N4陶瓷与灰铸铁配副的摩擦学性能
,
摩擦学学报 , 1997,
Abstract: 在M-200磨损试验机上于无润滑、蒸馏水润滑、乳化液润滑和10^#机构油润滑4种条件下,对Si3N4陶瓷分别与灰铸铁HT和T8钢配副进行了摩擦损性能的对比试验研究。结果表明:Si3N4陶瓷与灰铸铁HT配副时的摩擦因数和磨损体积在几种润滑环境中均表现出同样的顺序
不同滑动条件下与氧化铝对摩时灰铸铁中石墨的减摩抗磨作用
,
摩擦学学报 , 2001,
Abstract: 考察了灰铸铁/A12O3陶瓷摩擦副在干摩擦、蒸馏水、乳化液和机油润条件下的摩擦磨损特性,并分析灰铸铁中石墨在不同润滑剂润滑下的减摩作用。结果表明:在这几种润滑条件下A12O3陶瓷和铸铁摩擦副的摩擦系数及摩损量都有所降低;在干摩擦及蒸馏水润滑下,石墨能起减摩耐磨作用;而在乳化液及油润滑下石墨难以起到润滑作用。
基于特征偏好的聚类研究
玲?,灿?
计算机科学 , 2015, DOI: 10.11896/j.issn.1002-137X.2015.05.012
Abstract: 传统的聚类方法,如k均值和模糊c均值,通常并不区分数据特征对聚类的不同贡献或重要度,因此在面对高维数据聚类时,常会导致偏低的聚类性能,这归咎于聚类时未考虑高维数据特征间所存在的高度相关性或冗余。而通过在聚类时为每一特征引入权重并通过聚类目标的优化,不仅能自动获得对应的权重,而且也获得了聚类性能的提升。尽管如此,但无监督获取的特征权重未必吻合用户所期望的特征间的相对重要性(或偏好)。因此尝试利用用户给定的实际偏好设计出能反映特征偏好的聚类方法,其将现有独立于个体聚类的全局加权型偏好聚类方法拓展至聚类依赖的局部特征加权型方法,由此弥补了前者的不足,提升了偏好聚类算法的性能。
上海首批选定十二个示范中医科建设单位
刘文选,
中国中医药信息杂志 , 1997,
Abstract: 上海市卫生局为进一步加强占全市中医药人员及床位三分之一的综合性医院中医科内涵建设,充分发挥综合性医院在人才、技术、设备、管理等综合优势,计划“九五”期间在全市设有中医科的108所区县级以上综合性医院建设一批中医特色突出,临床疗效显著,服务功能齐全,队伍结构合理,管理水平高、精神文明建设先进的示范中医科,以点带面,逐步扩大。首批入选的十二个单位中医科其中医、中西医结合床位占所在医院床位的7.5%,门诊量占16.1%。
上海制定中医专科专病医疗协作中心验收细则
刘文选,
中国中医药信息杂志 , 1996,
Abstract: 上海市卫生局为提高中医临床疗效和中医整体水平,日前,发出关于实施《上海市中医、中西医结合专科(专病)医疗协作中心验收细则》和中期考核要求的通知。此项工作,自92年起,先后三次在全市中医、中西医结合及综合性医院布点41个,其中7个为全国中医医疗协作中心(剂改基地),通过三年来的建设,绝大多数中心软硬件建设都有了较大的发展,一些中心充分发挥自身技术的优势,出现了住院需提前登记预约的可喜现行,床位使用率在11%以上,中医药治疗率达100%,制定了本中心的各项规章制度和单病种的诊疗及护理常规,中西医结合脉管病中。
小潮气量和呼吸暂停联合低呼气末正压通气在输尿管软镜手术中的应用*
,
- , 2018, DOI: 10.3969/j.issn.1007-1989.2018.04.002
Abstract: 摘要: 探讨小潮气量和呼吸暂停联合低呼气末正压通气(PEEP)在输尿管软镜手术中的临床应用价值。方法?选择2016年1月-2017年1月该院收治的肾结石行输尿管软镜钬激光碎石术患者80例,随机分为两组,各40例,对照组为小潮气量(6 ml/kg)联合呼吸暂停通气组,观察组为小潮气量(6 ml/kg)、呼吸暂停联合低PEEP(5 cmH2O)组,比较初次呼吸暂停前与恢复正常呼吸后1 min内,患者心率(HR)、血压变化、血气分析结果中动脉血二氧化碳分压(PaCO2)、动脉血氧分压(PaO2)变化及呼吸力学指标如:气道峰压(Ppeak)、平均气道压(Pmean)变化,并统计不同时间点(麻醉前、手术开始前、拔除气管导管时、拔除气管后30 min及术后24 h)肺泡-动脉氧分压差(A-aDO2)、呼吸指数(RI)及肺动态顺应性20(CLdyn20)变化趋势。结果?恢复呼吸后,观察组HR及平均动脉压(MAP)、Ppeak及Pmean与呼吸暂停前比较差异无统计学意义(P >0.05),HR慢于恢复呼吸后对照组(P <0.05),MAP低于恢复呼吸后对照组(P <0.05),观察组Ppeak及Pmean均低于恢复呼吸后对照组(P <0.05);观察组PaCO2低于恢复呼吸后对照组(P <0.05),PaO2高于恢复呼吸后对照组(P <0.05),拔除气管导管时、拔除气管后30 min及术后24 h,观察组A-aDO2均明显低于对照组(P <0.05),CLdyn20优于对照组(P <0.05),RI大于对照组(P <0.05)。结论?针对输尿管软镜手术,术中行小潮气量(6 ml/kg)、呼吸暂停联合5 cmH2O低PEEP处理,在确保手术顺利进行前提下,可更好地维持患者生命体征平稳、血气分析结果正常,改善机体氧供需平衡,保护患者肺功能,促进患者术后恢复。
Abstract: Abstract: Objective?To research the application of low tidal volume, apnea ventilation and low PEEP in soft ureteroscope surgery.?Methods?80 patients with renal calculi who underwent ureteroscopic holmium laser lithotripsy were randomly divided into tow groups, 40 patients in each group. The observation group was treated with low tidal volume, apnea ventilation and Low PEEP, and the control group was treated with low tidal volume and apnea ventilation. Recorded the HR, MBP, PaCO2, PaO2, Ppeak, A-aDO2, and recorded A-aDO2 at pre-anesthesia, preoperation, tracheal extubation, 30 min after tracheal extubation and 24 hours after surgery in tow groups. And observed the trend of RI and CLdyn in tow groups.?Results?There were no satistically significant differences of HR, MBP, Ppeak and Pmean after recovery and that before apnea in the observation group (P > 0.05); the HR, MBP, Ppeak and Pmean of the observation group was lower than that of the control group after recovery (P < 0.05); the PaO2 of the observation group was higher than that of the control group after recovery (P < 0.05); at tracheal extubation, 30 min after tracheal extubation and 24 hours after surgery, the A-aDO2 of the observation group was lower than that of the control group (P < 0.05); the CLdyn 20 in the observation group was better than that in the control group (P < 0.05).?Conclusion?In soft ureteroscope surgery, the application of Low tidal volume, apnea ventilation and low PEEP can ensure the asfe of operation, and maintain the vital aspect, results of blood gas analysis smoothly; and protect the lung function, promote the recovery of the patients.
Page 1 /44734
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.