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《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
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.
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
耿志修
《中国工程科学》 2008年 第10卷 第3期 页码 31-43
关键词: 中国铁路 大秦线 20 kt级重载组合列车 集成创新
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
《医学前沿(英文)》 2022年 第16卷 第1期 页码 139-149 doi: 10.1007/s11684-021-0835-8
关键词: B-cell acute lymphoblastic leukemia bispecific antibody trispecific antibody CD19 CD20
Spatial embedded reinforcement of 20-node block element for analysis PC bridges
LONG Peiheng, DU Xianting, CHEN Weizhen
《结构与土木工程前沿(英文)》 2008年 第2卷 第3期 页码 274-280 doi: 10.1007/s11709-008-0039-1
关键词: arithmetic analysis calculation prestressed reinforcement mechanical arbitrary
Synchronous rectal adenocarcinoma and anal canal adenocarcinoma
GU Jin, YAO Yunfeng, LI Jiyou, LU Aiping, WANG Hongyi
《医学前沿(英文)》 2007年 第1卷 第3期 页码 333-337 doi: 10.1007/s11684-007-0064-9
关键词: CK7+/CK20+ resection different therapeutic strategy upper-third
Effects of irradiation on chromium’s behavior in ferritic/martensitic FeCr alloy
Xinfu HE, Wen YANG, Zhehao QU, Sheng FAN
《能源前沿(英文)》 2009年 第3卷 第2期 页码 181-183 doi: 10.1007/s11708-009-0025-x
《化学科学与工程前沿(英文)》 2023年 第17卷 第9期 页码 1244-1253 doi: 10.1007/s11705-022-2293-5
关键词: zinc-ion battery CaV8O20 polyaniline coating synergistic engineering high capacity long durability
武冠英
《中国工程科学》 1999年 第1卷 第3期 页码 79-85
文章从合成橡胶的化学基础出发,叙述了合成橡胶工业二十世纪以来的过去、现状,并展望未来。着重讨论了合成化学基础及相应聚合工艺过程的进步这两方面的问题。指出合成橡胶化学基础中活性聚合、可控聚合,包括茂金属催化剂仍为近期的重点;气相聚合工艺将会得到较大的发展;高效聚合釜的研究仍是核心问题;环保问题应更受到重视。
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
Preclinical characterization and comparison between CD3/CD19 bispecific and novel CD3/CD19/CD20 trispecific
期刊论文
Spatial embedded reinforcement of 20-node block element for analysis PC bridges
LONG Peiheng, DU Xianting, CHEN Weizhen
期刊论文
Synchronous rectal adenocarcinoma and anal canal adenocarcinoma
GU Jin, YAO Yunfeng, LI Jiyou, LU Aiping, WANG Hongyi
期刊论文
Effects of irradiation on chromium’s behavior in ferritic/martensitic FeCr alloy
Xinfu HE, Wen YANG, Zhehao QU, Sheng FAN
期刊论文
Vanadium oxide cathode with synergistic engineering of calcium-ion intercalation and polyaniline coating for high performance zinc-ion batteries
期刊论文