检索结果-南通市图书馆

State of the art of bioimplants manufacturing： part II

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Manufacturing 2018年第1期6卷 137-154页

作者： cheng-wei kang Feng-Zhou Fang Centre of MicroNano Manufacturing Technology (MNMT- Dublin) University College Dublin Belfield Ireland State Key Laboratory of Precision Measuring Technology & Instruments Centre of MicroNano Manufacturing Technology Tianjin University Tianjin 300072 People's Republic of China

The manufacturing of bioimplants not only involves selecting proper biomaterials with satisfactory bulk physicochemical properties, but also requires special treatments on surface chemistry or topography to direct a desired host response. The lifespan of a bioimplant is also critically restricted by its surface properties. Therefore, developing proper surface treatment technologies has become one of the research focuses in biomedical engineering. This paper covers the recent progress of surface treatment of bioimplants from the aspects of coating and topography modification. Pros and cons of various tech- nologies are discussed with the aim of providing the most suitable method to be applied for different biomedical products. Relevant techniques to evaluate wear, corrosion and other surface properties are also reviewed.

关键词： Bioimplant Precision manufacturing Surfacetreatment Evaluation

Precision micro-milling process:state of the art

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2021年第2期9卷 173-205页

作者： Lorcan O’Toole cheng-wei kang Feng-Zhou Fang Center of Micro/Nano Manufacturing Technology(MNMT-Dublin) University College DublinDublin 4Ireland State Key Laboratory of Precision Measuring Technology and Instruments Center of Micro/Nano Manufacturing Technology(MNMT)Tianjin UniversityTianjin 300072People’s Republic of China

Micro-milling is a precision manufacturing process with broad applications across the biomedical,electronics,aerospace,and aeronautical industries owing to its versatility,capability,economy,and efficiency in a wide range of *** particular,the micro-milling process is highly suitable for very precise and accurate machining of mold prototypes with high aspect ratios in the microdomain,as well as for rapid micro-texturing and micro-patterning,which will have great importance in the near future in bio-implant *** is particularly true for machining of typical difficult-to-machine materials commonly found in both the mold and orthopedic implant ***,inherent physical process constraints of machining arise as macromilling is scaled down to the *** leads to some physical phenomena during micromilling such as chip formation,size effect,and process *** dynamic physical process phenomena are introduced and discussed in *** is important to remember that these phenomena have multifactor effects during micro-milling,which must be taken into consideration to maximize the performance of the *** most recent research on the micro-milling process inputs is discussed in detail from a process output perspective to determine how the process as a whole can be ***,newly developed processes that combine conventional micro-milling with other technologies,which have great prospects in reducing the issues related to the physical process phenomena,are also ***,the major applications of this versatile precision machining process are discussed with important insights into how the application range may be further broadened.

关键词： Precision machining Micro-milling Size effect Deflection Runout Tool wear

An analytical method for assessing the initiation and interaction of cracks in fused silica subjected to contact sliding

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Manufacturing 2023年第3期11卷 363-377页

作者： Chang-Sheng Li Na Zhao Liang-Chi Zhang Jian-Jun Ding Lin Sun Duan-Zhi Duan cheng-wei kang Zhuang-De Jiang State Key Laboratory for Manufacturing Systems Engineering&International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies Xi'an Jiaotong UniversityXi'an 710049People's Republic of China State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics Southern University of Science and TechnologyShenzhen 518055GuangdongPeople's Republic of China SUSTech Institute for Manufacturing Innovation Southern University of Science and TechnologyShenzhen 518055GuangdongPeople's Republic of China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongPeople's Republic of China

Understanding the fracture behavior of fused silica in contact sliding is important to the fabrication of damage-free *** study develops an analytical method to characterize the stress field in fused silica under contact sliding by extending the embedded center of dilation(ECD)model and considering the depth of yield *** effects of densification on the stress fields were considered by scratch volume analysis and finite element *** mechanisms,such as crack initiation and morphology evolution were comprehensively investigated by analyzing the predicted stress fields and principal stress *** predictions were validated by Berkovich scratching *** was found that partial conical,median and lateral cracks could emerge in the loading stage of the contact sliding,but radial and lateral cracks could be initiated during *** was also found that the partial conical crack had the lowest initiation *** intersection of long lateral cracks makes the material removal greater.

关键词： Fused silica Contact sliding Stress field Crack initiation Material removal

EXPERIMENTAL　INVESTIGATION　OF　KINETIC　AND　TRANSPORT　PARAMETERS　IN　A　WALL－COOLED　FIXED－BED　REACTOR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高校化学工程学报 1994年第S1期8卷 33-36页

作者： Zhen-Min cheng and wei-kang YUAN(UNILAB Research Center of Chemical Reaction Engineering, East China University of science and Technology, 200237, Shanghai)

ＥＸＰＥＲＩＭＥＮＴＡＬＩＮＶＥＳＴＩＧＡＴＩＯＮＯＦＫＩＮＥＴＩＣＡＮＤＴＲＡＮＳＰＯＲＴＰＡＲＡＭＥＴＥＲＳＩＮＡＷＡＬＬ－ＣＯＯＬＥＤＦＩＸＥＤ－ＢＥＤＲＥＡＣＴＯＲＺｈｅｎ－ＭｉｎＣＨＥＮＧａｎｄＷｅｉ－Ｋａ... 详细信息

ＥＸＰＥＲＩＭＥＮＴＡＬＩＮＶＥＳＴＩＧＡＴＩＯＮＯＦＫＩＮＥＴＩＣＡＮＤＴＲＡＮＳＰＯＲＴＰＡＲＡＭＥＴＥＲＳＩＮＡＷＡＬＬ－ＣＯＯＬＥＤＦＩＸＥＤ－ＢＥＤＲＥＡＣＴＯＲＺｈｅｎ－ＭｉｎＣＨＥＮＧａｎｄＷｅｉ－ＫａｎｇＹＵＡＮ（ＵＮＩＬＡＢＲｅｓｅ...

关键词： Fixed -bed reactor Parameter estimation Reactor design.

Nonlinearity Analysis of CMOS LNA Based on Volterra Series

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nonlinearity Analysis of CMOS LNA Based on Volterra Series

Relationship between longitudinal changes in lipid composition and ischemic stroke among hypertensive patients

2002海峡两岸三地无线科技研讨会

作者： ZHANG wei-cheng, CHEN kang-sheng Department of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China

A Volterra series-based approach to nonlinearity analysis of RF CMOS LNA is given. Analytical expressions describing nonlinear behavior of source degenerated and cascode CMOS LNAs are derived and veri

关键词： intermodulation distortion low noise amplifier MOSFET amplifier Volterra series

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第4期13卷 18-27页

作者： cheng-cheng wei Yu-Qing Huang cheng-Hong Yu Department of Cardiology Tongxiang First People's HospitalTongxiang 314500Zhejiang ProvinceChina Department of Cardiology Guangdong Cardiovascular InstituteGuangzhou 510080Guangdong ProvinceChina

BACKGROUND Dyslipidemia was strongly linked to stroke,however the relationship between dyslipidemia and its components and ischemic stroke remained *** To investigate the link between longitudinal changes in lipid profiles and dyslipidemia and ischemic stroke in a hypertensive *** Between 2013 and 2014,6094 hypertension individuals were included in this,and ischemic stroke cases were documented to the end of *** changes of lipid were stratified into four groups:(1)Normal was transformed into normal group;(2)Abnormal was transformed into normal group;(3)Normal was transformed into abnormal group;and(4)Abnormal was transformed into abnormal *** examine the link between longitudinal changes in dyslipidemia along with its components and the risk of ischemic stroke,we utilized multivariate Cox proportional hazards models with hazard ratio(HR)and 95%*** The average age of the participants was 62.32 years±13.00 years,with 329 women making up 54.0%of the *** the course of a mean follow-up of 4.8 years,143 ischemic strokes *** normal was transformed into normal group was used as a reference,after full adjustments,the HR for dyslipidemia and ischemic stroke among abnormal was transformed into normal group,normal was transformed into abnormal group and abnormal was transformed into abnormal wei CC et *** changed and ischemic stroke WJCC https://*** 2 February 6,2025 Volume 13 Issue 4 group were 1.089(95%CI:0.598-1.982;P=0.779),2.369(95%CI:1.424-3.941;P<0.001)and 1.448(95%CI:1.002-2.298;P=0.047)(P for trend was 0.233),*** In individuals with hypertension,longitudinal shifts from normal to abnormal in dyslipidemia-particularly in total and low-density lipoprotein cholesterol-were significantly associated with the risk of ischemic stroke.

关键词： Longitudinal change Hypertension Dyslipidemia Lipid profile Ischemic stroke

Spatial transcriptomics combined with single-nucleus RNA sequencing reveals glial cell heterogeneity in the human spinal cord

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3302-3316页

作者： Yali Chen Yiyong wei Jin Liu Tao Zhu cheng Zhou Donghang Zhang Department of Anesthesiology West China HospitalSichuan UniversityChengduSichuan ProvinceChina Laboratory of Anesthesia and Critical Care Medicine National-Local Joint Engineering Research Center of Translational Medicine of AnesthesiologyWest China HospitalSichuan UniversityChengduSichuan ProvinceChina Department of Anesthesiology Longgang District Maternity&Child Healthcare Hospital of Shenzhen City(Longgang Maternity and Child Institute of Shantou University Medical College)ShenzhenGuangdong ProvinceChina Department of Anesthesiology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Glial cells play crucial roles in regulating physiological and pathological functions,including sensation,the response to infection and acute injury,and chronic neurodegenerative *** cells include astrocytes,microglia,and oligodendrocytes in the central nervous system,and satellite glial cells and Schwann cells in the peripheral nervous *** the greater understanding of glial cell types and functional heterogeneity achieved through single-cell and single-nucleus RNA sequencing in animal models,few studies have investigated the transcriptomic profiles of glial cells in the human spinal ***,we used high-throughput single-nucleus RNA sequencing and spatial transcriptomics to map the cellular and molecular heterogeneity of astrocytes,microglia,and oligodendrocytes in the human spinal *** explore the conservation and divergence across species,we compared these findings with those from *** the human spinal cord,astrocytes,microglia,and oligodendrocytes were each divided into six distinct transcriptomic *** the mouse spinal cord,astrocytes,microglia,and oligodendrocytes were divided into five,four,and five distinct transcriptomic subclusters,*** comparative results revealed substantial heterogeneity in all glial cell types between humans and ***,we detected sex differences in gene expression in human spinal cord glial ***,in all astrocyte subtypes,the levels of NEAT1 and CHI3L1 were higher in males than in females,whereas the levels of CST3 were lower in males than in *** all microglial subtypes,all differentially expressed genes were located on the sex *** addition to sex-specific gene differences,the levels of MT-ND4,MT2A,MT-ATP6,MT-CO3,MT-ND2,MT-ND3,and MT-CO_(2) in all spinal cord oligodendrocyte subtypes were higher in females than in ***,the present dataset extensively characterizes glial cell heterogeneity and offers a valuable resource for explo

关键词： astrocyte glial cell human microglia oligodendrocyte sex differentiation single-nucleus RNA sequencing spatial transcriptomics species variation spinal cord

泪道逆行置管联合妥布霉素地塞米松治疗成人泪道阻塞

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

国际眼科杂志 2018年第10期18卷 1922-1924页

作者：张高明韩玫王晓东成敏承伟康中国江苏省江阴市中医院眼科 214400 中国江苏省江阴市中医院耳鼻喉科 214400

目的:探讨泪道逆行置管联合妥布霉素地塞米松眼膏治疗成人泪道阻塞的疗效。方法:选取2012-05/2016-11我院收治的成人泪道阻塞患者34例46眼,均接受泪道逆行置管联合妥布霉素地塞米松眼膏治疗,术后随访6～18mo,观察治疗效果及并发症情况... 详细信息

目的:探讨泪道逆行置管联合妥布霉素地塞米松眼膏治疗成人泪道阻塞的疗效。方法:选取2012-05/2016-11我院收治的成人泪道阻塞患者34例46眼,均接受泪道逆行置管联合妥布霉素地塞米松眼膏治疗,术后随访6～18mo,观察治疗效果及并发症情况。结果:本组患者均顺利完成泪道置管,术后2～3mo拔管。至末次随访,治愈39眼(85%),好转5眼(11%),无效2眼(4%),后行经内窥镜下泪囊鼻腔吻合术治愈; 39眼(85%)治疗中鼻腔少量出血,15眼(33%)眼睑水肿,11眼(24%)内眦部瘙痒不适,1眼(2%)义管滑脱。结论:泪道逆行置管联合妥布霉素地塞米松眼膏是治疗成人泪道阻塞的有效方法,能有效减少并发症的发生。

关键词：泪道逆行置管成人泪道阻塞并发症

Antidepressant effects of paeoniflorin in behavioral models of depression

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Antidepressant effects of paeoniflorin in behavioral models ...