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耿志修
《中国工程科学》 2008年 第10卷 第3期 页码 31-43
大秦线是我国第一条双线重载电气化运煤专线,西起北同蒲线,东至秦皇岛,全长653 km,设计运量为1×108重载配套装备,通过集成创新,使大秦线开行20 kt级重载组合列车获得成功,年运量由2002年的1×108 t提高到2007年的3×108 t,是原设计能力的
关键词: 中国铁路 大秦线 20 kt级重载组合列车 集成创新
杜彦良,张文涛
《中国工程科学》 2009年 第11卷 第10期 页码 61-66
针对重载铁路运行安全监测的迫切需求,提出了一种基于光纤激光传感器的重载铁路在途安全状态监测技术。
《结构与土木工程前沿(英文)》 页码 1072-1085 doi: 10.1007/s11709-023-0951-4
关键词: carbon nanotube MISQ20 FG-CNTRC plate nonlinear vibration nonlinear dynamic analysis SFEM
Rolling-element bearings in China: From ancient times to the 20th century
Lie SUN,Ang LI
《机械工程前沿(英文)》 2016年 第11卷 第1期 页码 33-43 doi: 10.1007/s11465-016-0373-2
The development of rolling-element bearings in China has spanned a long period. Based on several typical and important cases, the present article reconstructs the history of rolling-element bearings in China by dividing it into four stages according to the various characteristics of the bearings. The first stage represents the origin of rolling bearings in China, which remains controversial because of several suspected races and cages that were likely the components of bearings more than a millennium ago. At the second stage, a type of simple roller bearing was used for astronomical instruments not later than the 13th century based on clear philological and physical evidence. A similar bearing was also applied to an abridged armillary in the 17th century. Another type of spherical thrust bearings with rolling elements, which is a key component of a traditional Chinese windmill, could support a rotating shaft that moves rotationally and at an angle. At the third stage, the Chinese began studying and using the so-called European-style bearing since the 17th century. Moreover, over the last 100 years, the modern rolling bearing industry was gradually established in China, particularly because of the technology transfer from the Soviet Union in the 1950s. At the fourth stage, the Chinese government initiated the relatively rapid development of bearing technology. The government launched the “bearing movement” from the 1950s to the 1960s to establish the modern bearing industry and to promote rolling bearings as replacement for traditional sliding bearings. Furthermore, a number of large professional factories and institutions in China have continually introduced advanced technology and equipment. At present, these companies and institutions play a significant role in the international bearing industry.
关键词: bearing movement rolling-element bearing China early rolling bearings technology transfer
薛继连
《中国工程科学》 2011年 第13卷 第8期 页码 43-49
神华重载铁路工程立足于神华集团自身实际需求,致力于重载铁路成套技术研发,着重在重载铁路工程建设技术、重载运输技术、建设运营管理技术3个方面积极开展工程技术创新系列技术创新不仅推动了神华集团尽快掌握重载铁路核心技术,而且促进了企业快速发展,并取得了显著的社会效益和经济效益。神华铁路走出了一条以企业为主体、以需求为导向,通过打造产、学、研联合体、推行科研项目工程化等手段开展重载铁路技术研究的新路子。
ORGANIC CARBON STOCKS IN A SILTY TEXTURED SOIL FOLLOWING REINTEGRATION OF A 20 YEARS OLD × SITE INTO
《农业科学与工程前沿(英文)》 2023年 第10卷 第2期 页码 183-197 doi: 10.15302/J-FASE-2023485
● 0.98 Mg·ha−1·yr−1 Corg accumulation under miscanthus over 26 years.
林建辉,易彩,张卫华,丁建明,刘璐,张兵
《中国工程科学》 2015年 第17卷 第4期 页码 83-89
高速列车运行时空上的跨越所面临的振动、环境变化,使其服役状态与安全性态始终处于时变状态,给高速列车安全保障与健康维护带来极大的挑战。随着高速列车运营里程的增长,高速列车服役性能的研究成为保障我国高速列车技术持续发展的重要课题。在分析高速列车服役性能基本内容的基础上,提出了高速列车服役性能检测体系,阐明了其建设内容与方案,并发展了高速列车走行部跟踪试验技术,跟踪试验对高速列车服役性能的研究具有显著成效与提升。
Hideo Nakamura
《工程(英文)》 2016年 第2卷 第3期 页码 380-386 doi: 10.1016/J.ENG.2016.03.015
列车控制系统的作用是确保铁路的安全。本文首先总结了日本、欧洲通用的列车控制系统,在此基础上,笔者根据现有列车控制系统,提出以下问题:应该采用什么方法来提高列车控制系统的功能性、安全性和可靠性,并协助铁路的商业运营?其次,笔者提出了一个有助于基于当前信息和通信技术对新型列车控制系统进行开发的理想架构;同时,还提出了一种新的统一列车控制系统(UTCS),它能有效地提高列车控制系统的鲁棒性和竞争力。
薛继连,贾晋中,李晓建
《中国工程科学》 2012年 第14卷 第12期 页码 100-105
发展重载铁路是国家宏观环境对神华集团有限责任公司提出的要求。重载铁路技术创新的特点决定了其必须采取开放式创新的模式,构建创新平台是发展重载铁路技术的必然选择。介绍了神华重载铁路技术创新平台构建所坚持的需求引领、企业主导、整合资源、依托项目、高效适用和持续创新的总体思路,论述了重载铁路技术创新平台的组织、人才、资金和制度等构成要素,分析了重载铁路技术创新平台运行的过程通过重载铁路技术创新平台的构建与运行,神华铁路形成了独具特色的重载铁路技术创新模式,取得了一系列技术创新成效,有力地支撑了企业战略目标的实现,为同类型企业乃至行业的技术创新提供了新思路。
Green building research from design to operation in the past 20 years: A perspective
Borong LIN, Yi WANG, Jiaping LIU, Juan YU
《结构与土木工程前沿(英文)》 2020年 第14卷 第5期 页码 1049-1055 doi: 10.1007/s11709-020-0668-6
夏瑶,黄志球
《信息与电子工程前沿(英文)》 2021年 第22卷 第2期 页码 141-286 doi: 10.1631/FITEE.1900726
Fanfan Li, Mengzhou He, Meitao Yang, Yao Fan, Yun Chen, Xi Xia, Yin Xie, Dongrui Deng
《医学前沿(英文)》 2018年 第12卷 第5期 页码 542-549 doi: 10.1007/s11684-017-0576-x
Preeclampsia (PE) is a pregnancy-specific, multi-system disorder and the leading cause of maternal and perinatal morbidity and mortality in obstetrics worldwide. Excessive vasoconstriction and dysregulated coagulation function are closely associated with PE. Heat shock protein 20 (HSP20) is ubiquitously expressed under normal physiological conditions and has important roles in vascular dilatation and suppression of platelet aggregation. However, the role of HSP20 in the pathogenesis of PE remains unclear. In this study, we collected chorionic plate resistance arteries (CPAs) and serum from 118 healthy pregnant women and 80 women with PE and detected the levels of HSP20 and its phosphorylated form. Both HSP20 and phosphorylated HSP20 were downregulated in CPAs from women with PE. Comparison of the vasodilative ability of CPAs from the two groups showed impaired relaxation responses to acetyl choline in preeclamptic vessels. In addition to the reduced HSP20 in serum from women with PE, the platelet distribution width and mean platelet volume were also decreased, and the activated partial thromboplastin time and thromboplastin time were elevated. With regard to the vital roles of HSP20 in mediating vasorelaxation and coagulation function, the decreased HSP20 might contribute to the pathogenesis of PE.
关键词: preeclampsia heat shock protein 20 vascular relaxation coagulation-fibrinolytic system
张卫华
《中国工程科学》 2015年 第17卷 第4期 页码 42-52
根据高速铁路结构和技术特点,把高速列车以及与之相关并影响其动力学性能的线路、气流、供电和接触网等耦合系统作为一个统一的大系统,通过建立高速列车、线路、弓网及供电等子系统动力学模型,以及轮轨、弓网、流固和机电等耦合关系模型,形成高速列车耦合大系统动力学模型。针对高速列车运行模拟要求,给出基于循环变量方法的列车动力学建模及计算方法、基于滑移模型的车线耦合计算方法、基于松弛因子的流固耦合计算方法,实现高速列车耦合大系统动力学仿真。
标题 作者 时间 类型 操作
Nonlinear dynamic analysis of functionally graded carbon nanotube-reinforced composite plates using MISQ20
期刊论文
ORGANIC CARBON STOCKS IN A SILTY TEXTURED SOIL FOLLOWING REINTEGRATION OF A 20 YEARS OLD × SITE INTO
期刊论文
Green building research from design to operation in the past 20 years: A perspective
Borong LIN, Yi WANG, Jiaping LIU, Juan YU
期刊论文
Alteration of heat shock protein 20 expression in preeclamptic patients and its effect in vascular and
Fanfan Li, Mengzhou He, Meitao Yang, Yao Fan, Yun Chen, Xi Xia, Yin Xie, Dongrui Deng
期刊论文