检索结果-南通市图书馆

Multi-Objective Optimization of the Ultrasonic Scalpel Rod and Tip with Improved Performance:Vibration Frequency,Amplitude,and Service life

引用

Chinese Journal of Mechanical Engineering 2024年第4期37卷 107-119页

作者： Jiaqi Zhao Yuhao Zhai Xuzhe Jia Naiwen Deng kunxu li Guangchao Han Rong Chen Dong Wang Wei Bai School of Mechanical Engineering and Electronic Information China University of GeosciencesWuhan 430074China Shenzhen Research Institute China University of GeosciencesShenzhen 518057China College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter EX44QFUK Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518000China

Ultrasonic scalpel design for minimally invasive surgical procedures is mainly focused on optimizing cutting ***,an important issue is the low fatigue life of traditional ultrasonic scalpels,which affects their long-term reliability and effectiveness and creates hidden dangers for *** this study,a multi-objective optimal design for the cutting performance and fatigue life of ultrasonic scalpels was proposed using finite element analysis and fatigue *** optimal design parameters of resonance frequency and amplitude were *** setting the transition fillet and keeping the gain structure away from the node position to enable the scalpel to have a high service life with excellent cutting *** frequency modulation method of setting the vibration node bosses at the node position and setting the vibration antinode grooves at the antinode position was ***,the mechanism of the influence of various design elements,such as tip,shank,node position,and antinode position,on the resonance frequency,amplitude,and fatigue life of the ultrasonic scalpel was analyzed,and the optimal design principles of the ultrasonic scalpel were *** proposed ultrasonic scalpel design was confirmed by simulations,impedance measurements,and liver tissue cutting experiments,demonstrating its feasibility and enhanced *** research introduces innovative design strategies to improve the fatigue life and performance of ultrasonic scalpels to address an important issue in minimally invasive surgery.

关键词： Multi-objective optimal design Minimally invasive surgical procedures Service life Ultrasonic scalpel

来源：

维普期刊数据库

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

Ascorbate oxidase electrochemical biosensor based on the biocompatible poly(3,4-ethylenedioxythiophene) matrices for agricultural application in crops

引用

Chinese Chemical Letters 2012年第2期23卷 221-224页

作者： Yang Ping Wen li Min Lu Dong li Ming liu Hao Hua He Jing kunxu Key Lab of Crop Physiology Ecology and Genetic BreedingMinistry of EducationJiangxi Agricultural UniversityNanchang 330045China Jiangxi Key Lab of Organic Chemistry Jiangxi Science and Technology Normal UniversityNanchang 330013China

The vitamin C（VC） in crops was successfully determined using ascorbate oxidase（AO） electrochemical biosensor based on the biocompatible poly（3,4-ethylenedioxythiophene）（PEDOT） matrices,which was easily prepared by one-step electrodeposition technique in ionic liquid *** fabricated biosensor displayed excellent bioelectrocatalytic performance to the oxidation of VC,wide linear range,low detection limit,fast response time,good operational and storage stability,the good results of the determination of VC in vegetable crops indicated that the fabricated biosensor will be a good candidate for the physiological and biochemical studies of crops in near future.

关键词： Biosensor Agricultural application Ionic liquid microemulsions Ascorbate oxidase Poly(3 4-ethyl-enedioxythiophene) Vitamin C

来源：

维普期刊数据库

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

Facile preparation of core-shell Si@li4Ti5O12 nanocomposite as large-capacity lithium-ion battery anode

引用

Journal of Energy Chemistry 2020年第1期29卷 89-98,I0004页

作者： Mengjing liu Hanyang Gao Guoxin Hu kunxu Zhu Hao Huang School of Mechanical and Power Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Hangzhou Dianzi UniversityHangzhou 310018ZhejiangChina Shanghai Marine Diesel Engine Research Institute Shanghai 200090China

As a promising alternative anode material,silicon(Si)presents a larger capacity than the commercial anode to achieve large capacity lithium-ion ***,the application of pure Si as anode is hampered by limitations such as volume expansion,low conductivity and unstable solid electrolyte *** break through these limitations,the core-shell Si@li4Ti5O12nanocomposite,which was prepared via in-situ self-assembly reaction and decompressive boiling fast concentration method,was proposed in this *** anode combines the advantages of nano-sized Si particle and pure li4Ti5O12(LTO)coating layer,improving the performance of the lithium-ion *** Si@li4Ti5O12 anode displays a high initial discharge/charge specific capacity of 1756/1383 m Ahg^-1 at 500 mAg^-1(representing high initial coulombic efficiency of 78.8%),a large rate capability(specific capacity of 620 mAhg^-1 at4000 mAg^-1),an outstanding cycling stability(reversible specific capacity of 883 mAhg^-1 after 150 cycles)and a low volume expansion rate(only 3.3% after 150 cycles).Moreover,the synthesis process shows the merits of efficiency,simplicity,and economy,providing a reliable method to fabricate large capacity Si@li4Ti5O12nanocomposite anode materials for practical lithium-ion batteries.

关键词： Si@li4Ti5O12 composites Core-shell nanoparticles In-situ self-assembly Decompressive boiling concentration lithium-ion battery anode

来源：

维普期刊数据库

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

Bazi Bushen alleviates reproductive aging in aged male mice

引用

Chinese Journal of Natural Medicines 2024年第5期22卷 416-425页

作者： MA Kun li Mengnan SONG Yahui MAO Xinjing ZHANG Shaolan ZHANG Yaping JIANG Yuning JI Chuanyuan NIU kunxu li Hongrong HOU Yunlong WEI Cong Graduate School Hebei University of Chinese MedicineShijiazhuang 050091China State Key Laboratory for Innovation and Transformation of Luobing Theory Shijiazhuang 050035China Key Laboratory of State Administration of TCM(Cardio-Cerebral Vessel Collateral Disease) Shijiazhuang 050035China College of Traditional Chinese Medicine·College of Integrated Traditional Chinese and Western Medicine Nanjing University of Chinese MedicineNanjing 210023China Hebei Provincial Key Laboratory of Luobing Shijiazhuang 050035China Key Disciplines of State Administration of TCM for Luobing Shijiazhuang 050035China

Bazi Bushen(BZBS),a traditional Chinese medicine(TCM),has demonstrated therapeutic efficacy in testicular dysfunction within D-galactose and NaNO_(2)mouse *** study aimed to ascertain if BZBS could also mitigate the decline in testicular function associated with natural ***,male aged mice were employed to evaluate the preventive effects of BZBS on male reproductive *** was achieved by assessing sex hormone production,testicular histomorphology,and *** to the untreated aged control group,BZBS administration elevated the levels of sex hormones and spermatocyte populations and preserved normal testicular structure in aged ***,spermatogenesis was *** analyses,including malondialdehyde(MDA)assays and real-time PCR,indicated that BZBS diminished testicular oxidative stress and the inflammatory *** these findings,mice treated with BZBS exhibited reductions in the populations of senescent and apoptotic cells within the seminiferous tubules,suggesting alleviated cellular *** contrast,we observed that rapamycin,a drug known for its longevity benefits,induced excessive testicular apoptosis and did not decrease lipid ***,our results highlight BZBS’s promising clinical potential in counteracting male reproductive aging,underlining its mechanisms of action.

关键词： Traditional Chinese medicine Male reproductive aging Spermatogenic cells Cell senescence Apoptosis

来源：

维普期刊数据库

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

互联网发展、劳动力逆向转移与产业结构早熟

引用

财经科学 2021年第12期 92-105页

作者：田洪刚李晓倩于坤旭济南大学商学院中国重汽集团济南专用车有限公司

产业结构早熟属于"逆库兹涅茨"式产业结构演化的范畴,挤压了制造业空间,会诱发产业结构回退,造成国家经济增长乏力,容易陷入"中等收入陷阱"。本文借助Duarte和Restuccia(2010)三部门模型,探讨了互联网发展与产业结构早熟的关系。研究结... 详细信息

产业结构早熟属于"逆库兹涅茨"式产业结构演化的范畴,挤压了制造业空间,会诱发产业结构回退,造成国家经济增长乏力,容易陷入"中等收入陷阱"。本文借助Duarte和Restuccia(2010)三部门模型,探讨了互联网发展与产业结构早熟的关系。研究结论如下:(1)在全国层面与东中部地区,互联网发展与产业结构早熟存在"U"型关系。(2)由于在分区域层面互联网发展影响产业结构早熟的拐点值不一样,不同省份未来经济发展策略的着力点存在较大差异。(3)劳动力逆向转移作为中介变量,加剧了全国和东中部地区的产业结构早熟。基于以上研究结论,未来需要通过兼顾互联网的就业效应和劳动生产率提升效应,准确研判区域差异,充分发挥互联网在制造业与服务业融合中的积极作用,解决产业结构早熟问题。

关键词：互联网发展产业结构演化劳动力逆向转移

来源：

维普期刊数据库

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

基于气络学说精气神理论论治衰老所致认知障碍

引用

南京中医药大学学报 2024年第3期40卷 234-239页

作者：李雅文李红蓉陆璇申晓刚张洁晗张润涛牛坤旭张世雄河北医科大学中西医结合学院河北石家庄050017 络病理论创新转化全国重点实验室河北石家庄050035 河北以岭医药研究院国家中医药管理局重点研究室(心脑血管络病)河北石家庄050035 河北以岭医院国家中医药管理局中医络病学重点学科河北石家庄050035 南京中医药大学中医学院江苏南京210023 河北省中医心血管疾病临床医学研究中心河北石家庄050035

衰老以认知障碍为主要表现,随老龄化加剧,已然成为全球关注的热点问题。认为精为生命起源,气是生命动力,神是生命体现。以气络学说精气神理论为指导提出衰老所致认知障碍的关键病机及相应治法,肾精虚衰,脑髓失充为根本,元气亏虚,脑络失... 详细信息

衰老以认知障碍为主要表现,随老龄化加剧,已然成为全球关注的热点问题。认为精为生命起源,气是生命动力,神是生命体现。以气络学说精气神理论为指导提出衰老所致认知障碍的关键病机及相应治法,肾精虚衰,脑髓失充为根本,元气亏虚,脑络失通为关键,脑神失养、神机失用为表现,治以补肾填精充脑髓,温扶元气通脑络,充养脑神运神机,以期对延缓和防治衰老所致认知障碍有所裨益。

关键词：气络学说精气神理论衰老认知障碍

来源：

维普期刊数据库

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

高速卷绕机关键部件的动力学分析与减振研究

引用

中原工学院学报 2022年第6期33卷 42-48,57页

作者：黎刚生魏方杰王东强董学武姜海芹陈坤旭中原工学院机电学院河南郑州450007 中原工学院先进纺织装备技术省部共建协同创新中心河南郑州450007 中原工学院学报编辑部河南郑州450007

首先介绍了高速卷绕机的工作原理,然后对目前高速卷绕机关键部件横动导丝部件和卷绕部件的具体结构和优缺点进行了阐述,最后对当前先进的高速卷绕机的动力学特性进行了分析,认为高速卷绕头是一个变质量、变刚度、变转速的时频变激励复... 详细信息

首先介绍了高速卷绕机的工作原理,然后对目前高速卷绕机关键部件横动导丝部件和卷绕部件的具体结构和优缺点进行了阐述,最后对当前先进的高速卷绕机的动力学特性进行了分析,认为高速卷绕头是一个变质量、变刚度、变转速的时频变激励复杂转子系统,最后提出了相应的减振方法以及新型材料的应用措施。

关键词：卷绕机横动机构卷绕头转子动力学减振技术

来源：

维普期刊数据库

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：