检索结果-南通市图书馆

A machine learning-guided design and manufacturing of wearable nanofibrous acoustic energy harvesters

Nano Research 2024年第10期17卷 9181-9192页

作者： Negar Hosseinzadeh Kouchehbaghi Maryam Yousefzadeh Aliakbar Gharehaghaji Safoora Khosravi Danial Khorsandi Reihaneh Haghniaz Ke Cao Mehmet R.Dokmeci Mohammad Rostami Ali Khademhosseini yangzhi zhu Terasaki Institute for Biomedical Innovation Los AngelesCA 91367USA Department of Textile Engineering Amirkabir University of Technology(Tehran Polytechnic)Hafez Avenue*** TehranIran Department of Electrical and Computer Engineering University of British ColumbiaVancouverBC V6T1Z4Canada Chemical Sciences Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Department of Computer Science University of Southern CaliforniaLos AngelesCA 90007USA

Nanofibrous acoustic energy harvesters(NAEHs)have emerged as promising wearable platforms for efficient noise-to-electricity conversion in distributed power energy systems and wearable sound amplifiers for assistive listening ***,their reallife efficacy is hampered by low power output,particularly in the low-frequency range(<1 kHz).This study introduces a novel approach to enhance the performance of NAEHs by applying machine learning(ML)techniques to guide the synthesis of electrospun polyvinylidene fluoride(PVDF)/polyurethane(PU)nanofibers,optimizing their application in wearable *** use a feed-forward neural network along with solving an optimization problem to find the optimal input values of the electrospinning(applied voltage,nozzle-collector distance,electrospinning time,and drum rotation speed)to generate maximum output performance(acoustic-to-electricity conversion efficiency).We first prepared a dataset to train the network to predict the output power given the input variables with high *** introducing the neural network,we fix the network and then solve an optimization problem using a genetic algorithm to search for the input values that lead to the maximum energy harvesting *** ML-guided wearable PVDF/PU NAEH platform can deliver a maximal acoustoelectric power density output of 829μW/cm^(3) within the surrounding noise *** addition,our system can function stably in a broad frequency(0.1-2 kHz)with a high energy conversion efficiency of 66%.Sound recognition analysis reveals a robust correlation exceeding 0.85 among lexically akin terms with varying sound intensities,contrasting with a diminished correlation below 0.27 for words with disparate semantic ***,this work provides a previously unexplored route to utilize ML in advancing wearable NAEHs with excellent practicability.

关键词： wearable electronics acoustic energy harvester machine learning piezoelectric nanogenerator electrospun nanofiber

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tissue adhesive hemostatic microneedle arrays for rapid hemorrhage treatment

引用

Bioactive Materials 2023年第5期23卷 314-327页

作者： Reihaneh Haghniaz Han-Jun Kim Hossein Montazerian Avijit Baidya Maryam Tavafoghi Yi Chen yangzhi zhu Solmaz Karamikamkar Amir Sheikhi Ali Khademhosseini Department of Bioengineering University of CaliforniaLos Angeles410 Westwood PlazaLos AngelesCA90095United States California NanoSystems Institute University of CaliforniaLos Angeles570 Westwood PlazaLos AngelesCA90095United States Terasaki Institute for Biomedical Innovation 11570 W Olympic BoulevardLos AngelesCA90024United States Department of Chemical Engineering The Pennsylvania State UniversityUniversity ParkPA16802United States Department of Biomedical Engineering The Pennsylvania State UniversityUniversity ParkPA16802United States

Blood loss by hemorrhaging wounds accounts for over one-third of~5 million trauma fatalities worldwide every *** not controlled in a timely manner,exsanguination can take lives within a few *** new biomaterials that are easy to use by non-expert patients and promote rapid blood coagulation is an unmet medical ***,biocompatible,and biodegradable microneedle arrays(MNAs)based on gelatin methacryloyl(GelMA)biomaterial hybridized with silicate nanoplatelets(SNs)are developed for hemorrhage *** SNs render the MNAs hemostatic,while the needle-shaped structure increases the contact area with blood,synergistically accelerating the clotting time from 11.5 min to 1.3 min in *** engineered MNAs reduce bleeding by~92%compared with the untreated injury group in a rat liver bleeding ***-containing MNAs outperform the hemostatic effect of needle-free patches and a commercial hemostat in vivo via combining micro-and nanoengineered ***,the tissue adhesive properties and mechanical interlocking support the suitability of MNAs for wound closure *** hemostatic MNAs may enable rapid hemorrhage control,particularly for patients in developing countries or remote areas with limited or no immediate access to hospitals.

关键词： Hemostat Microneedles Hemorrhage Bleeding Gelatin methacryloyl Silicate nanoplatelets

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fabric-substrated capacitive biopotential sensors enhanced by dielectric nanoparticles

引用

Nano Research 2021年第9期14卷 3248-3252页

作者： Xiangjun Chen Xiaoxiang Gao Akihiro Nomoto Keren Shi Muyang Lin Hongjie Hu Yue Gu yangzhi zhu zhuohong Wu Xue Chen Xinyu Wang Baiyan Qi Sai Zhou Hong Ding Sheng Xu Materials Science and Engineering Program University of California San DiegoLa JollaCA 92093USA Department of NanoEngineering University of California San DiegoLa JollaCA 92093USA Department of Electrical and Computer Engineering University of California San DiegoLa JollaCA 92093USA Department of Bioengineering University of California San DiegoLa JollaCA 92093USA

Wearable biopotential sensing devices are essential to long-term and real-time monitoring of human ***-contact,capacitive sensing electrodes prevent potential skin iritations,and are thus beneficial for long-term *** capacitive electrodes are either connected to a separate control circuit via external wires or have limited sensing capacitances,which leads to low signal *** study demonstrates a stretchable capacitive sensing device with integrated electrodes and control electronics,with enhanced signal *** electrodes and the control electronics are fabricated on a common fabric substrate for breathability and strain-limiting *** stretchable electrodes are based on an island-bridge design with a stretchability as high as-100%,and an area ratio as high as-80%.By using a dielectric calcium copper titanate(CCTO)composite as the adhesive layer,the electrode capacitance can be increased,yielding an enhanced signal-to-noise ratio(SNR)in the acquired *** device offers a convenient and comfortable approach for long-term non-contact monitoring of biopotential signals.

关键词： capacitive sensing biopotential stretchable calcium copper titanate(CCTO) signal-to-noise ratio(SNR)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ultrathin-shell epitaxial Ag@Au core-shell nanowires for high-performance and chemically-stable electronic, optical, and mechanical devices

引用

Nano Research 2021年第11期14卷 4294-4303页

作者： yangzhi zhu Sanggon Kim Xuezhi Ma Peter Byrley Ning Yu Qiushi Liu Xiaoming Sun Da Xu Sangshan Peng Martin C.Hartel Shiming Zhang Vadim Jucaud Mehmet R.Dokmeci Ali Khademhosseini Ruoxue Yan Department of Chemical and Environmental Engineering Bourns College of EngineeringUniversity of California-RiversideRiversideCA92521USA Terasaki Institute for Biomedical Innovation Los AngelesCA90064USA Department of Electrical and Computer Engineering University of California-RiversideRiversideCA92521USA State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha410082China Department of Bioengineering University of California-Los AngelesLos AngelesCA90095USA Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina Material Science and Engineering Program University of California-RiversideRiversideCA92521USA

Silver nanowires (AgNWs) hold great promise for applications in wearable electronics, flexible solar cells, chemical and biological sensors, photonic/plasmonic circuits, and scanning probe microscopy (SPM) due to their unique plasmonic, mechanical, and electronic properties. However, the lifetime, reliability, and operating conditions of AgNW-based devices are significantly restricted by their poor chemical stability, limiting their commercial potentials. Therefore, it is crucial to create a reliable oxidation barrier on AgNWs that provides long-term chemical stability to various optical, electrical, and mechanical devices while maintaining their high performance. Here we report a room-temperature solution-phase approach to grow an ultra-thin, epitaxial gold coating on AgNWs to effectively shield the Ag surface from environmental oxidation. The Ag@Au core-shell nanowires (Ag@Au NWs) remain stable in air for over six months, under elevated temperature and humidity (80 °C and 100% humidity) for twelve weeks, in physiological buffer solutions for three weeks, and can survive overnight treatment of an oxidative solution (2% H2O2). The Ag@Au core-shell NWs demonstrated comparable performance as pristine AgNWs in various electronic, optical, and mechanical devices, such as transparent mesh electrodes, surface-enhanced Raman spectroscopy (SERS) substrates, plasmonic waveguides, plasmonic nanofocusing probes, and high-aspect-ratio, high-resolution atomic force microscopy (AFM) probes. These Au@Ag core-shell NWs offer a universal solution towards chemically-stable AgNW-based devices without compromising material property or device performance.

关键词： epitaxial growth core-shell nanowire plasmonic waveguides atomic force microscopy(AFM)probe transparent electrode wearable electronics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Additively manufactured metallic biomaterials

引用

Bioactive Materials 2022年第9期7卷 214-249页

作者： Elham Davoodi Hossein Montazerian Anooshe Sadat Mirhakimi Masoud Zhianmanesh Osezua Ibhadode Shahriar Imani Shahabad Reza Esmaeilizadeh Einollah Sarikhani Sahar Toorandaz Shima ASarabi Rohollah Nasiri yangzhi zhu Javad Kadkhodapour Bingbing Li Ali Khademhosseini Ehsan Toyserkan Multi-Scale Additive Manufacturing(MSAM)Laboratory Mechanical and Mechatronics Engineering DepartmentUniversity of WaterlooWaterlooOntario N2L 3G1Canada Department of Bioengineering University of CaliforniaLos AngelesCalifornia 90095United States California NanoSystems Institute(CNSI) University of CaliforniaLos AngelesCalifornia 90095United States Terasaki Institute for Biomedical Innovation Los AngelesCalifornia 90024United States Department of Mechanical Engineering Isfahan University of TechnologyIsfahanIsfahan 84156-83111Iran School of Biomedical Engineering University of SydneySydneyNew South Wales 2006Australia Department of Nanoengineering Jacobs School of EngineeringUniversity of CaliforniaSan DiegoCalifornia 92093United States Mechanical and Aerospace Engineering Department University of CaliforniaLos AngelesCalifornia 90095United States Department of Mechanical Engineering Shahid Rajaee Teacher Training UniversityTehranTehran 16785-163Iran Institute for Materials Testing Materials Science and Strength of MaterialsUniversity of StuttgartStuttgart 70569Germany Department of Manufacturing Systems Engineering and Management California State UniversityNorthridgeCalifornia 91330United States

Metal additive manufacturing(AM)has led to an evolution in the design and fabrication of hard tissue substitutes,enabling personalized implants to address each patient’s specific *** addition,internal pore architectures integrated within additively manufactured scaffolds,have provided an opportunity to further develop and engineer functional implants for better tissue integration,and long-term *** this review,the latest advances in different aspects of the design and manufacturing of additively manufactured metallic biomaterials are *** introducing metal AM processes,biocompatible metals adapted for integration with AM machines are ***,we elaborate on the tools and approaches undertaken for the design of porous scaffold with engineered internal architecture including,topology optimization techniques,as well as unit cell patterns based on lattice networks,and triply periodic minimal ***,the new possibilities brought by the functionally gradient porous structures to meet the conflicting scaffold design requirements are thoroughly ***,the design constraints and physical characteristics of the additively manufactured constructs are reviewed in terms of input parameters such as design features and AM processing *** assess the proposed applications of additively manufactured implants for regeneration of different tissue types and the efforts made towards their clinical ***,we conclude the review with the emerging directions and perspectives for further development of AM in the medical industry.

关键词： Additive manufacturing Metal implant Porous scaffold Tissue engineering Biomaterials

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tunable hybrid hydrogels with multicellular spheroids for modeling desmoplastic pancreatic cancer

引用

Bioactive Materials 2023年第7期25卷 360-373页

作者： Menekse Ermis Natashya Falcone Natan Roberto de Barros Marvin Mecwan Reihaneh Haghniaz Auveen Choroomi Mahsa Monirizad Yeji Lee Jihyeon Song Hyun-Jong Cho yangzhi zhu Heemin Kang Mehmet R.Dokmeci Ali Khademhosseini Junmin Lee Han-Jun Kim Terasaki Institute for Biomedical Innovation(TIBI) Los AngelesCA90024USA Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)PohangGyeongbuk37673Republic of Korea College of Pharmacy Kangwon National UniversityChuncheonGangwon24341Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul02841Republic of Korea Institute for Convergence Research and Education in Advanced Technology Yonsei UniversityIncheon 21983Republic of Korea College of Pharmacy Korea UniversitySejong30019Republic of Korea

The tumor microenvironment consists of diverse,complex etiological *** matrix component of pancreatic ductal adenocarcinoma(PDAC)plays an important role not only in physical properties such as tissue rigidity but also in cancer progression and therapeutic *** significant efforts have been made to model desmoplastic PDAC,existing models could not fully recapitulate the etiology to mimic and understand the progression of ***,two major components in desmoplastic pancreatic matrices,hyaluronic acid-and gelatin-based hydrogels,are engineered to provide matrices for tumor spheroids composed of PDAC and cancer-associated fibroblasts(CAF).Shape analysis profiles reveals that incorporating CAF contributes to a more compact tissue *** expression levels of markers associated with proliferation,epithelial to mesenchymal transition,mechanotransduction,and progression are observed for cancer-CAF spheroids cultured in hyper desmoplastic matrix-mimicking hydrogels,while the trend can be observed when those are cultured in desmoplastic matrix-mimicking hydrogels with the presence of transforming growth factor-β1(TGF-β1).The proposed multicellular pancreatic tumor model,in combination with proper mechanical properties and TGF-β1 supplement,makes strides in developing advanced pancreatic models for resembling and monitoring the progression of pancreatic tumors,which could be potentially applicable for realizing personalized medicine and drug testing applications.

关键词： Pancreatic cancer Desmoplasia Fibrosis Extracellular matrix Tumor microenvironment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

论武术精神对大学生身心建设的价值

引用

武术研究 2015年第11期 26-27页

作者：朱洋志湖北警官学院

文章运用文献分析法、逻辑分析法等研究方法,通过对武术精神的探讨,以武术精神对大学生体现的价值为逻辑起点,论述了武术精神进入大学对学生身心建设的价值体现,进而强化武术精神对学生的认知。

关键词：武术精神大学生身心建设价值

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

武术散打比赛中男子运动员摔法技术运用分析——以第十届全运会散打比赛为例

引用

武术研究 2015年第12期 39-41页

作者：朱洋志黄佩君赵瑜湖北警官学院

摔法是散打独具特色的技法,文章通过对第十届全国运动会的武术散打比赛中男子运动员摔法技术运用分析,总结摔法特点,重点分析摔法在散打实战中的运用及所产生的作用和效果,成功使用摔法动作,对散手比赛的胜负有着关键作用,在进行训练时... 详细信息

摔法是散打独具特色的技法,文章通过对第十届全国运动会的武术散打比赛中男子运动员摔法技术运用分析,总结摔法特点,重点分析摔法在散打实战中的运用及所产生的作用和效果,成功使用摔法动作,对散手比赛的胜负有着关键作用,在进行训练时必须根据摔法技术动作的快速性,没有固定把位的特点来进行基本技术训练,方能将摔法练好。

关键词：散打摔法技术比赛

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Analysis on Dynamic Characteristics in Time Domain of Slider with Ultra Thin Spacing

引用

Chinese Journal of Mechanical Engineering 2012年第3期25卷 439-445页

作者： YAO Huaping HUANG Ping CHEN yangzhi zhu Lixue School of Mechanical and Electrical Engineering Zhongkai University of Agriculture and EngineeringGuangzhou 510225China School of Mechanical and Automobile Engineering South China University of TechnologyGuangzhou 510640China

With increasing recording density in computer hard disks,the flying height of the magnetic head becomes 10 nm or *** numerical method of the control equations needs to be optimized consistently with the decrease of the flying *** iterative process is usually divergent with traditional methods which cannot ensure the accuracy of the analysis results and the stability of numerical ***,a new scheme is presented to solve the ultra-thin lubricating control equations in this *** equilibrium equation is obtained by taking the Couette flow terms and time term as dominating terms in iterative ***,the weighting flow factor is introduced for the abrupt change of film thickness in order to reduce calculated ***,the rules for variation of flying pose of the magnetic head with time are obtained by the time domain *** results show that the magnetic head can recover to the equilibrium position after being slightly influenced by outside *** the dynamic lubrication properties of the head suffer heavily from the vibrations in the height direction and fluctuation in the pitch ***,the analysis of the sine roughness-passing capacity of the head indicates that the head can surpass small sine waves and the equilibrium position can be retrieved after a period of decaying *** proposed research ensures the accuracy and stability of the numerical calculation of the control equations,and the dynamic characteristics and flying stability of a magnetic head is studied *** can also be the theoretical basis for the analysis of the flight characteristics of the slider.

关键词： dynamic characteristic ultra-thin spacing dynamic response magnetic head

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

餐厨垃圾车整车布置与密封技术

引用

汽车实用技术 2022年第7期47卷 25-28页

作者：薛亚刚王瞳玮朱仰智马莹陕西汽车控股集团有限公司陕西西安710200

餐厨垃圾车是一款收集和运输餐厨垃圾的专用车辆,在收运过程中用户和政府要实现全程监管、结算。文章从整车布置与密封技术出发介绍了一款纯电动餐厨垃圾车,主要从其浮动式铰接机构和可调式楔紧机构两方面保证后门密封,整车布置合理,装... 详细信息

餐厨垃圾车是一款收集和运输餐厨垃圾的专用车辆,在收运过程中用户和政府要实现全程监管、结算。文章从整车布置与密封技术出发介绍了一款纯电动餐厨垃圾车,主要从其浮动式铰接机构和可调式楔紧机构两方面保证后门密封,整车布置合理,装载量大,带称重系统,密封无泄漏,为餐厨垃圾车的发展提供了较高的参考价值。

关键词：餐厨垃圾车整车布置密封技术浮动式铰接机构可调式楔紧机构

来源：

维普期刊数据库博看期刊

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

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

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：