检索结果-内蒙古大学图书馆

Photocatalytic 1 and Antimicrobial activity study for Cadmium Sulphide Quantum Dots

Materials Research Innovations 2023年第6期27卷 392-400页

作者： Malik, Azad Qayoom Lokhande, P.E. Kumar, Deepak Mooney, Joseph Sharma, Ajit Gani Mir, Tahir Ul Department of Chemistry School of Chemical Engineering and Physical Sciences Lovely Professional University Phagwara India Department of Mechanical Manufacturing and Biomedical Engineering Trinity College Dublin Ireland Department of Forensic Science School of Bioengineering and Biosciences Lovely Professional University Phagwara India

Cadmium Sulphide (CdS) Quantum dots (QDs) has been synthesised by using precipitation method. Structural and morphological characteristics of CdS QDs were measured by XRD, FT-IR, and FESEM techniques. The thermal properties of nanomaterial were also studied by thermogravimetric and differential scanning calorimetry. The optical band gap was calculated by using Tauc plot. The synthesised material was employed as a photocatalyst for the degradation of 2-chlorophenol (2-CP) under UV light irradiation. The impact of pH for photodegradation of the catalyst has also been investigated and shows higher efficiency at high pH. The photodegradation efficiency was found to be 80% with increasing amount of catalyst. Antimicrobial activities against E. coli and Aeromonas hydrophilia were also performed by this CdS QDs. This work demonstrates the potential applications of CdS for photodegradation and antimicrobial activity. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Cadmium sulfide

来源：评论

学校读者我要写书评

暂无评论

Study on the Relationship Between Vibration Signals in CFRP Grinding and Grinding Mechanism

引用

Chinese Journal of mechanical engineering 2024年第6期37卷 334-345页

作者： Lichen Li Fangyuan Wang Pengda Song Kai Jin Lei Chu Sansan Ding Guido A.Berti Luca Quagliato College of Material Science and Technology Ocean University of ChinaQingdao 266404China CRRC Qingdao Sifang Locomotive&Rolling Stock Co. Ltd.Qingdao 266111China Department of Management and Engineering University of Padua36100 VicenzaItaly Division of Mechanical and Biomedical Engineering Ewha Womans UniversitySeoul 03760Republic of Korea

In the process of grinding carbon fiber reinforced polymer(CFRP),the changing state of acceleration vibration signal is closely related to the grinding surface ***,the time domain and frequency domain signal changes in acceleration can be used to monitor and control the grinding process to improve machining quality and *** this paper,changes in acceleration frequency domain signals under different grinding angles are studied,and the relationship between the vibration forms of acceleration frequency domain signals at the beginning,middle and end of grinding as well as the surface morphology and quality of the corresponding grinding position is *** with the micro-morphology of the grinding area,it can be seen that,a high frequency and low amplitude vibration can improve the grinding surface quality,but a high amplitude will have a negative impact on the grinding *** acceleration vibration during grinding is more stable and the corresponding surface quality is *** an increase in grinding angle,the maximum amplitude of acceleration first increases and then *** length of the surface fiber also initially decreases and then ***,the resin residue first increases and then *** purpose of this study is to provide a theoretical basis for the subsequent grinding state adjustment.

关键词： CFRP Grinding mechanism Acceleration signal Roughness

来源：评论

学校读者我要写书评

暂无评论

Laser powder bed fusion of a Ni3Al-based intermetallic alloy with tailored microstructure and superior mechanical performance

Advanced Powder Materials

引用

Advanced Powder Materials 2024年第1期3卷 90-101页

作者： Mingyu Liu Jiang Wang Tao Hu Songzhe Xu Sansan Shuai Weidong Xuan Shuo Yin Chaoyue Chen Zhongming Ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Parsons Building Department of MechanicalManufacturing and Biomedical EngineeringTrinity College DublinThe University of DublinDublinIreland College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China

Ni3Al-based alloys are excellent candidates for the structural materials used for turbine engines due to their excellent high-temperature *** study aims at laser powder bed fusion and post-hot isostatic pressing(HIP)treatment of Ni3Al-based IC^(-2)21 M alloy with a highγ0 volume *** as-built samples exhibits unavoidable solidification cracking and ductility dip cracking,and the laser parameter optimization can reduce the crack density to 1.34 mm/mm^(2).Transmission electron microscope(TEM)analysis reveals ultra-fine nanoscaleγ0 phases in the as-built samples due to the high cooling rate during rapid *** HIP treatment,a fully dense structure without cracking defects is achieved,which exhibits an equiaxed structure with grain size~120-180μm and irregularly shapedγ0 precipitates~1-3μm with a prominently high fraction of 86%.The room-temperature tensile test of as-built samples shows a high ultimate tensile strength(σUTS)of 1039.7 MPa and low fracture elongation of 6.4%.After HIP treatment,a significant improvement in ductility(15.7%)and a slight loss of strength(σUTS of 831.7 MPa)are obtained by eliminating the crack *** the as-built and HIP samples exhibit retained highσUTS values of 589.8 MPa and 786.2 MPa,respectively,at *** HIP samples exhibita slight decrease in ductility to~12.9%,indicating excellent high-temperature mechanical ***,the abnormal increase in strength and decrease in ductility suggest the critical role of a highγ0 fraction in cracking *** intrinsic heat treatment during repeating thermal cycles can induce brittleness and trigger cracking initiation in the heat-affected zone with notable deteriorating *** results indicate that the combination of LPBF and HIP can effectively reduce the crack density and enhance the mechanical properties of Ni_(3)Al-based alloy,making it a promising material for high-temperature applications.

关键词： Laser powder bed fusion Ni3Al-Based alloy Hot isostatic pressing Solidification cracking High-temperature tensile performance

来源：评论

学校读者我要写书评

暂无评论

Magnetic Kirigami by Laser Cutting

引用

Acta Mechanica Solida Sinica 2023年第4期36卷 594-601页

作者： Jian Wang Yumei Zhou Lanying Xu Lelun Jiang Liu Wang School of Mechatronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument School of Biomedical EngineeringSun Yat-sen UniversityGuangzhou 510006China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230026China

Magnetic kirigami with tunable configurations under magnetic actuation is of significant interest in various emerging ***,there remains a grand challenge to develop magnetic kirigami with a facile fabrication strategy,programmable mag-netization,and *** this work,we present a novel magnetic kirigami that is readily fabricated by the laser cutting *** magnetic kirigami consists of an array of magnetic microplates,each with a programmed *** applying an actuation magnetic field,each microplate can rotate and even flip,allowing for predesigned kirigami *** further coating the surface of the microplate array,the magnetic kirigami can be programmed with *** demonstrate a potential application of information encryption by engineering magnetic kirigami into a magneto-responsive QR *** a simple fabrication strategy,our work paves the way for other applications of magnetic kirigami.

关键词： Magnetic kirigami Laser cutting Magnetic actuation

来源：评论

学校读者我要写书评

暂无评论

Utilizing Mobile Robots to Teach Dengue and Chikungunya Prevention in Brazilian Schools 16

Utilizing Mobile Robots to Teach Dengue and Chikungunya Prev...

引用

16th Brazilian Symposium on Robotics and 15th Workshop on Robotics in Education, SBR-WRE 2024

作者： Costa, R.B. Gomes, Pedro H.L. Rodriguez Silva, Luiz F. Pastrana, M.A. Gontijo, Maria C.C. Luiz, M.S. Muñoz, Daniel M. Department of Mechanical Engineering Mechatronics Graduate Program University of Brasilia DF Brasilia Brazil Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia DF Brasilia Brazil Faculty of Gama Aerospace Engineering Undergraduate Program University of Brasilia DF Brasilia Brazil

ISBN: (纸本)9798350391084

This paper introduces a novel approach to combating the spread of Dengue and Chikungunya, two prevalent arboviruses in tropical regions, especially in Brazil. The research presents a low-cost differential topology robot designed as an educational tool to raise awareness about mosquito breeding grounds among students and teachers in public schools across the Federal District, Brazil. Developed at the University of Brasilia, the robot is deployed in collaboration with the Federal District Health department to support prevention campaigns in schools. The paper evaluates the effectiveness of this innovative tool in enhancing community engagement and improving health outcomes. The findings suggest that integrating robotics into health education can significantly elevate awareness and strengthen prevention strategies against arboviral diseases. ©2024 IEEE.

关键词： Mobile robots

来源：评论

学校读者我要写书评

暂无评论

Effect of elastin on delamination strength in the porcine aortic tunica media

引用

Journal of Biorheology 2023年第2期37卷 120-129页

作者： Kurihara, Genki Ujihara, Yoshihiro Nakamura, Masanori Sugita, Shukei Department of Electrical and Mechanical Engineering Graduate School of Engineering Nagoya Institute of Technology Nagoya Japan Center of Biomedical Physics and Information Technology Nagoya Institute of Technology Nagoya Japan Department of Nanopharmaceutical Sciences Nagoya Institute of Technology Nagoya Japan

Aortic dissection (AD) is a disease in which the tunica media is separated into two layers and blood flows in the newly created lumen. To elucidate the etiology of AD, we investigated the effect of the decrease in elastin, which occurs in actual AD, on the delamination strength of the aorta. Healthy porcine aortas were purchased, and half specimens were immersed in an elastase solution, for elastin digestion. The delamination test was performed on the specimens in both the circumferential θ and longitudinal z directions. The area fractions of elastin and collagen were measured via a histological analysis, such as Elastica–Masson and Azan stains. In healthy specimens, the delamination strength in the z-direction tended (albeit insignificantly) to be higher than that in the θ-direction. Conversely, in elastase-treated specimens, the delamination strengths in both directions were almost the same and were significantly lower than those recorded in the healthy specimens. The area fraction of elastin, but not of collagen, was significantly lower in elastase-treated specimens compared with control specimens. These results indicate that a decrease in elastin causes a reduction in the delamination strength, especially in the z-direction, which may result in dissection propagation in that direction in AD. © Japanese Society of Biorheology 2023.

关键词： Elastin

来源：评论

学校读者我要写书评

暂无评论

Decoding Gait Speed Using Intracortical Signals in a Freely-Moving Non-Human Primate for the Control of Neurorobotics

Decoding Gait Speed Using Intracortical Signals in a Freely-...

引用

2024 IEEE International Conference on Robotics and Biomimetics, ROBIO 2024

作者： Chen, Long Zhang, Yilin Mo, Lifen Guo, Zheshan Gao, Fei Liang, Fengyan Liao, Wei-Hsin Yin, Ming School of Biomedical Engineering Hainan University Laboratory of Biomedical Engineering of Hainan Province Sanya China Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China The Chinese University of Hong Kong Department of Mechanical and Automation Engineering Shatin Hong Kong

ISBN: (纸本)9781665481090

Locomotion is one of the most fundamental and crucial motor abilities in both humans and animals. Compared to other quadrupedal mammals, primates exhibit unique quadrupedal characteristics, such as diagonal gait and compliant walking. Significant progress has been made in past studies to understand the relationship between behaviors and neural activities in primates. However, these studies often limit the behavior to constrained environments and focus only on the upper limbs. Here, we trained a macaque to walk freely on a treadmill at four different speeds (0.5, 1.0, 1.5, 2.0 km/h), Intracortical signals and videos were recorded at the same time. Our results indicate that the primary motor cortex (M1) exhibits higher neuronal firing rates during the swing phase of gait, suggesting its critical role in gait encoding. Furthermore, we utilized only eight neural units to decode gait speeds and employed mutual information for feature selection to improve the decoding accuracies. Results indicated that four gait speeds can be reliably classified with an accuracy of 82.1%. The firing rates of neurons from 100 ms to 300 ms before the forelimb raise exhibited the most variations during task execution and contributed the most to the decoder model. This study provides new insights into the cortical control of quadrupedal locomotion. The proposed cortical speed decoder can be applied in brain-computer-interface (BCI) to control neurorobotics such as exoskeletons and prostheses. © 2024 IEEE.

关键词： Brain computer interface

来源：评论

学校读者我要写书评

暂无评论

High-yield and rapid isolation of extracellular vesicles by flocculation via orbital acoustic trapping:FLOAT

引用

Microsystems & Nanoengineering 2024年第1期10卷 313-323页

作者： Joseph Rufo Peiran Zhang Zeyu Wang Yuyang Gu Kaichun Yang Joseph Rich Chuyi Chen Ruoyu Zhong Ke Jin Ye He Jianping Xia Ke Li Jiarong Wu Yingshi Ouyang Yoel Sadovsky Luke P.Lee Tony Jun Huang Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNCUSA Department of Biomedical Engineering Duke UniversityDurhamNCUSA Department of Obstetrics Gynecologyand Reproductive SciencesMagee-Womens Research InstituteUniversity of PittsburghPittsburghPAUSA Department of Microbiology and Molecular Genetics School of MedicineUniversity of PittsburghPittsburghPAUSA Renal Division and Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA Department of Bioengineering Department of Electrical Engineering and Computer ScienceUniversity of CaliforniaBerkeleyBerkeleyCAUSA Department of Biophysics Institute of Quantum BiophysicsSungkyunkwan UniversitySuwonKorea

Extracellular vesicles(EVs)have been identified as promising biomarkers for the noninvasive diagnosis of various ***,challenges in separating EVs from soluble proteins have resulted in variable EV recovery rates and low ***,we report a high-yield(>90%)and rapid(<10 min)EV isolation method called FLocculation via Orbital Acoustic Trapping(FLOAT).The FLOAT approach utilizes an acoustofluidic droplet centrifuge to rotate and controllably heat liquid *** adding a thermoresponsive polymer flocculant,nanoparticles as small as 20 nm can be rapidly and selectively concentrated at the center of the *** demonstrate the ability of FLOAT to separate urinary EVs from the highly abundant Tamm-Horsfall protein,addressing a significant obstacle in the development of EV-based liquid *** to its high-yield nature,FLOAT reduces biofluid starting volume requirements by a factor of 100(from 20 mL to 200µL),demonstrating its promising potential in point-of-care diagnostics.

关键词： trapping utilize separating

来源：评论

学校读者我要写书评

暂无评论

不锈钢-铜复合箔材微拉深成形性能的模拟和实验研究（英文）

引用

Journal of Central South University 2025年第4期32卷 1237-1251页

作者：齐艳阳马晓光姜正义马丽楠王志华周存龙 HASAN Mahadi DOBRZA?SKI Leszek A. 赵敬伟 College of Mechanical Engineering Taiyuan University of Technology Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment(Ministry of Education) School of Mechanical Materials Biomedical and Mechatronic Engineering University of Wollongong School of Mechanical Engineering Taiyuan University of Science and Technology Department of Industrial and Production Engineering American International University Bangladesh Medical and Dental Engineering Center for Research Design and Production ASKLEPIOS

在本研究中，将厚度为50μm的双层不锈钢-铜复合箔材分别在800、900和1000℃下退火5 min，以获得不同的微观组织结构。研究退火温度对不锈钢-铜复合箔材成形性能和微拉深件表面质量的影响，并分析了其成形机制，开发了基础模型、Vorono... 详细信息

在本研究中，将厚度为50μm的双层不锈钢-铜复合箔材分别在800、900和1000℃下退火5 min，以获得不同的微观组织结构。研究退火温度对不锈钢-铜复合箔材成形性能和微拉深件表面质量的影响，并分析了其成形机制，开发了基础模型、Voronoi模型和表面形貌模型用于分析不锈钢-铜复合箔材微拉深过程中的成形性能。结果表明，900℃退火的不锈钢-铜复合箔材的微观组织均匀且细化，因而表现出最佳的塑性。在微拉深过程中，拉深力随退火温度的升高而降低。900℃退火试样成形的微拉深件起皱较少，壁厚分布较均匀，表面质量较高。与基础模型和Voronoi模型相比，考虑材料不均匀性和表面形貌的表面形貌模型与实验结果最接近。

关键词：微拉深退火温度不锈钢-铜复合箔材成形性能起皱有限元方法

来源：评论

学校读者我要写书评

暂无评论

mechanical Characterization of AA6061/Clay (Kaolinite) Composites for Industrial Application 9

Mechanical Characterization of AA6061/Clay (Kaolinite) Compo...

引用

9th International Conference on Advances in Machinery, Materials Science and engineering Applications, MMSE 2023

作者： Udoye, N.E. Asikoko, F.C. Fayomi, O.S.I. Okeniyi, J.O. Department of Mechanical Engineering College of Engineering Covenant University Ota Lagos state Nigeria Department of Mechanical and Biomedical Engineering Bells University of Technology Ogun State OtaP.M.B 1015 Nigeria Department of Mechanical Engineering Science University of Johannesburg Johannesburg2006 South Africa

ISBN: (纸本)9781643684383

Traditional materials have certain restrictions in an industrial application today inhibiting them from the attainment of the best blend of toughness, density and strength. The paradigm shift in the use of agro-waste products as particulate reinforcement is an excellent choice owing to the inexpensive and availability of the desired agro-waste product. This research focuses on the development of AA6061 aluminium alloy through stir casting method using kaolinite clay as the reinforcement agent in increasing weight percentages of 2.5wt %, 5wt %, 7.5wt % and 10wt %.. The use of agro-waste as reinforcements is possible as the clay kaolinite was effectively infused into the pure matrix for composites to be constructed. The tensile strength was highest at the addition of 10 wt % of clay kaolinite. Brinell's hardness test showed an increase in value with an increase in the mass fraction of clay. It was observed from the results of the tests carried out that the reinforced specimens exhibited improved hardness when analyzed using Brinell's hardness machine. Some of these properties improved with the increase in weight percentage of reinforcement particles. This research has shown the importance of agricultural waste to material engineers, material handlers and metallurgists in our society and that it is the right way to go. © 2023 The Authors.

关键词： Kaolinite

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：