检索结果-内蒙古大学图书馆

The different structure and properties of protic ionic liquid in alcohol from acid and base:butylammonium butyrate mixing with butanol, butyric acid,and butylamine respectively

引用

Green Chemical engineering 2025年第1期6卷 85-92页

作者： Xuan Zhang Yue Zhang Haoran Li Jia Yao Department of Chemistry Zhejiang University ZJU-NHU United R&D Center Zhejiang University State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University

Solvents are commonly added into protic ionic liquids（PILs） to reduce viscosity in practical *** the relationship between the structure and properties of PILs mixed with solvents is also essential for tailoring specific applications,however,such research is *** this study,we measured and compared the density,viscosity,and conductivity of three mixed systems:n-butylammonium butyrate ionic liquid（PIL） mixing with N-butyric acid（PrCOOH）,PIL-N-butylamine（BuNH2）,and PIL-N-butanol（BuOH）.Small-and wide-angle Xray scattering（S/WAXS）,molecular dynamics（Md） simulation,and electron paramagnetic resonance（EPr）techniques were used to explore their inherent structural *** results indicate that the properties of the PIL-BuOH and PIL-PrCOOH systems exhibit more overall similarity in trends compared to the ***,when the molar fraction of alcohol or acid exceeds 0.8,structural differences between the two systems lead to the differences in *** hydrogen bond network between the BuOH molecules outside the ion cluster leads to higher viscosity and conductivity than the PIL-PrCOOH ***,the strong hydrogen bond between PrCOOH and anions will replace the position of cations and form spherical *** research highlights how distinct structures influence diverse properties,providing deeper insights into the structure-property relationship.

关键词： Protic ionic liquids solution Microstructure Properties Hydrogen bond Confinement effects

来源：评论

学校读者我要写书评

暂无评论

Comparison of tissue response and lifting effect induced by non-absorbable elastic thread and commercialized threads in rat model

引用

regenerative Biomaterials 2025年第1期4卷 84-93页

作者： dae Hyung Lee Yeji Choi Mi Hee Lee Jong-Chul Park Advanced Medical Device R&D Center HansBiomed Co.LtdSeoul 05836Republic of Korea Cellbiocontrol Laboratory Department of Medical EngineeringYonsei University College of MedicineSeoul 03722Republic of Korea

As we age,our skin loses elasticity and wrinkles *** prevent this,most people try to improve skin wrinkles by performing procedures such as fillers,and absorbable lifting *** way to solve this structural problem is to use an elastic *** elastic sutures made of polymer materials(such as silicone)are widely used,data regarding their properties and potential effectiveness are *** study aimed to investigate the effects of inserting non-absorbable elastic threads,with different manufacturing requirements and methods,on the skin and subcutaneous *** this study,non-absorbable elastic threads ELATENS and Elasticum using different manufacturing methods were *** thread was transplanted into the subcutaneous layer of the back of a rat to induce *** inducing wrinkles in the skin of rat,the degree of skin maintenance by each thread and the thickness of the capsule formed around the suture were *** ex-vivo experiments on each thread,the fixation force in the tissue was *** a comparison of inflammatory response and collagen formation through histological analysis,it was confirmed that there was no significant difference from the equivalent comparative *** conclusion,the degree of encapsulation between tissues and collagen fiber formation for improving skin wrinkles was superior in elastic threads compared to non-elastic *** is believed that this provides certain elasticity to the skin layer and can induce cell influx to improve wrinkles.

关键词： elasticity lifting rejuvenation suture thread

来源：评论

学校读者我要写书评

暂无评论

FANET and MANET, a Support and Composition relationship

引用

Computers, Materials & Continua 2025年第2期82卷 1699-1732页

作者： Carlos Andrés Tavera romero Jesús Hamilton Ortiz Luis Carlos rodríguez Timaná Fernando Vélez Varela Andrés Hernando Aristizábal Montufar Javier Gamboa-Cruzado COMBA R&D Laboratory Faculty of EngineeringUniversidad Santiago de CaliCali76001Colombia Development Department Closemobile R&D Telecommunications LSMadrid28070Spain GIEIAM Research Group Faculty of EngineeringUniversidad Santiago de CaliCali76001Colombia Faculty of Engineering Universidad LibreCali760031Colombia Faculty of Systems and Informatics Engineering Universidad Nacional Mayor de San MarcosLima15001Perú

This study investigates the design and implementation of Flying Ad Hoc Networks(FANETs),a network architec-ture inspired by the Mobile Ad Hoc Network(MANET)model,specifically tailored to support unmanned aerial vehicles(UAVs).As UAVs increasingly contribute to diverse fields,from surveillance to delivery,FANETs have emerged as essential in ensuring stable,dynamic communication channels among drones in *** research adopts a dual approach,combining rigorous theoretical analysis with detailed practical simulations to assess the performance,adaptability,and efficiency of FANETs in varying *** findings emphasize the ability of FANETs to manage network congestion effectively in densely populated areas,a critical feature for maintaining reliable communications in complex ***,FANETs demonstrate high potential to support critical applications,such as emergency response,disaster management,and public safety operations,where quick and coordinated action is *** study also underscores the importance of establishing a hierarchical structure among nodes within the network,which allows for more efficient data exchange and helps optimize the overall network *** this work,significant insights are offered into the design principles that can enhance UAV communication networks,providing a foundation for the development of more resilient,scalable,and efficient technological *** advancements could accelerate the deployment of UAVs across a variety of sectors,including logistics,agriculture,environmental monitoring,and *** such,this study not only contributes to the field of ad hoc networking but also holds potential for transformative impacts across industries where UAVs play an increasingly central role,promoting greater integration and operational success.

关键词： Ad hoc FANET MANET network UAV

来源：评论

学校读者我要写书评

暂无评论

Preparation and Mechanical Properties of Bionic Carbon Fiber/Epoxy resin Composites Inspired by Owl Feather

引用

Journal of Bionic engineering 2025年第1期22卷 282-292页

作者： Zerun Yu Jiaan Liu Tian Yang Linyang Zhang Chunhua Hu Key Laboratory of Automobile Materials(Ministry of Education) College of Materials Science and EngineeringJilin UniversityChangchun130022China National Key Laboratory of Advanced Vehicle Integration and Control General R&D InstituteChina FAW Co.LtdChangchun130011China

Insufficient interfacial activity and poor wettability between fibers and matrix are the two main factors limiting the improvement of mechanical properties of Carbon Fiber reinforced Plastics(CFrP).Owl feathers are known for their unique compact structure;they are not only lightweight but also *** this study,an in-depth look at owl feathers was made and it found that owl feathers not only have the macro branches structure between feather shafts and branches but also have fine feather structures on the *** presence of these fine feather structures increases the specific surface area of the plume branches and allows neighboring plume branches to hook up with each other,forming an effective mechanical interlocking *** structures bring owl feathers excellent mechanical *** by the natural structure of owl feathers,a weaving technique and a sizing process were combined to prepare bionic Carbon Fiber(CF)fabrics and then to fabricate the bionic CFrP with structural characteristics similar to owl *** evaluate the effect of the fine feather structure on the mechanical properties of CFrP,a mechanical property study on CFrP with and without the fine feather imitation structure were *** experimental results show that the introduction of the fine feather branch structure enhance the mechanical properties of CFrP ***,the tensile strength of the composites increased by 6.42%and 13.06%and the flexural strength increased by 8.02%and 16.87%in the 0°and 90°sample directions,*** results provide a new design idea for the improvement of the mechanical properties of the CFrP,promoting the application of CFrP in engineering fields,such as automotive transportation,rail transit,aerospace,and construction.

关键词： Carbon fiber reinforced epoxy composites Owl feather Bionic feather structure Mechanical properties

来源：评论

学校读者我要写书评

暂无评论

HeartMAE: Advancing Cardiac MrI Analysis through Optical Flow Guided Masked Autoencoding 4

HeartMAE: Advancing Cardiac MRI Analysis through Optical Flo...

引用

4th Machine Learning for Health Symposium, ML4H 2024

作者： Kim, Vladislav Schneider, Lisa Kalaie, Soodeh O'regan, declan Bender, Christian Machine Learning Research Pharmaceuticals R&D Bayer AG Germany MRC Laboratory of Medical Sciences Imperial College London United Kingdom Translational Sciences Pharmaceuticals R&D Bayer AG Germany

Cardiac MrI is a powerful diagnostic tool, but traditional analysis relies on complex segmentation-based workflows that may provide only a partial picture of cardiovascular health. To address these limitations, we introduce HeartMAE, a novel framework that uses masked autoencoding (MAE) to learn features directly from cardiac MrIs, without any labels. By incorporating optical flow during training, HeartMAE is guided towards cardiac regions, which significantly improves its downstream performance. A multitask model, built on a shared HeartMAE embedding layer, accurately predicts key cardiac health indicators, extracardiac features and major cardiovascular conditions. Moreover, HeartMAE features may be used as embeddings for clustering to enable patient stratification. requiring only MrI data, HeartMAE is highly scalable and adaptable to larger datasets, paving the way for foundation models in cardiac imaging. © 2024 V. Kim, L. Schneider, S. Kalaie, d. O'regan & C. Bender.

关键词： Heart

来源：评论

学校读者我要写书评

暂无评论

Joint-decoding-complexity-oriented collaborative design for joint source-channel coding system based on double protograph-LdPC codes

引用

Science China(Information sciences) 2023年第8期66卷 271-272页

作者： Zhiping XU dan SONG Jiachun ZHENG Lin WANG Xiamen Key Laboratory of Marine Intelligent Terminal R&D and Application School of Ocean Information EngineeringJimei University Department of Information and Communication Engineering Xiamen University

Although the code designs for the joint source-channel coding(JSCC) systems based on double protograph low-density parity-check(dP-LdPC) codes have been widely investigated over various coding channels, they tend to emphasize performance enhancements rather than the decoding complexity [1–3]. In the current landscape, the challenge associated with designing the dP-LdPC JSCC system with low decoding complexity [4] remains an open question.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Halophobic Prussian blue analogue electrodes for saturated saline water electrolysis

引用

Nano research 2025年第3期18卷 90-97页

作者： Wei Liu Jiage Yu Boyu ding Tianshui Li Shihang Li Xinlong Guo Linlin Zhou Benqiang Tian Yixin Zhang Yizhe Li Mengze Ma Kairui Wang Huijun Xin daojin Zhou Yun Kuang Xiaoming Sun State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing University of Chemical TechnologyBeijing 100029China Ocean Hydrogen Energy R&D Center Research Institute of Tsinghua University in ShenzhenShenzhen 518057China

Continuous seawater electrolysis is efficient for green hydrogen production,but some key issues have been *** example,the accumulated to saturated NaCl in electrolyte is poison to cathode by covering its surface and available active *** we demonstrate Pt/NiFe Prussian blue analogue(Pt/NiFePBA)electrode can continuously catalyze hydrogen evolution effectively at−500 mA·cm^(−2)in a 6 M NaOH electrolyte containing saturated NaCl,without being impeded by the formation of NaCl crystals on the electrode surface,which is in distinct contrast to commercial *** results indicate that Fe(CN)_(6)^(4−)spontaneously released by Pt/NiFePBA blocks the traditionally preferred basal plane growth of NaCl along{100}facets,but favors its growth along{110}basal *** alteration leads to an increased crystallization difficulty of NaCl near the electrode,rendering it halophobic(anti-NaCl precipitation)*** investigation should shed light on general salt involving process besides the practical implementation of seawater electrolysis.

关键词： seawater electrolysis saturate saline water hydrogen evolution reaction halophobic electrode Prussian blue analogue

来源：评论

学校读者我要写书评

暂无评论

Failure mechanisms in flexible electronics

引用

International Journal of Smart and Nano Materials 2023年第4期14卷 510-565页

作者： Zhehui Zhao Haoran Fu ruitao Tang Bocheng Zhang Yunmin Chen Jianqun Jiang MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang UniversityHangzhouChina Department of Civil Engineering Zhejiang UniversityHangzhouChina R&D department Wuxi Innosonics Medical Technology CoLtdWuxiChina R&D Department of devices and processes Jiashan Fudan InstituteJiaxingChina

The rapid evolution of flexible electronic devices promises to revolutionize numerous fields by expanding the applications of smart ***,despite this vast potential,the reliability of these innovative devices currently falls short,especially in light of demanding operation environment and the intrinsic challenges associated with their fabrication *** heterogeneity in these processes and environments gives rise to unique failure modes throughout the devices'*** significantly enhance the reliability of these devices and assure long-term performance,it is paramount to comprehend the underpinning failure mechanisms thoroughly,thereby,enabling,optimal design solutions.A myriad of investigative efforts have been dedicated to unravel these failure mechanisms,utilizing a spectrum of tools from analytical models,numerical methods,to advanced characterization *** review delves into the root causes of device failure,scrutinizing both the fabrication process and the operation ***,We subsequently address the failure mechanisms across four commonly observed modes:strength failure,fatigue failure,interfacial failure,and electrical failure,followed by an overview of targeted characterization methods associated with each *** with an outlook,we spotlight ongoing challenges and promising directions for future research in our pursuit of highly resilient flexible electronic devices.

关键词： Flexible electronic devices failure mechanisms characterization methods

来源：评论

学校读者我要写书评

暂无评论

Biaxial stretching of polytetrafluoroethylene in industrial scale to fabricate medical ePTFE membrane with node-fibril microstructure

引用

regenerative Biomaterials 2023年第1期10卷 1161-1177页

作者： Gang Wang Yusheng Feng Caiyun Gao Xu Zhang Qunsong Wang Jie Zhang Hongjie Zhang YongqiangWu Xin Li Lin Wang Ye Fu Xiaoye Yu deyuan Zhang Jianxiong Liu Jiandong ding State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China R&D Center Lifetech Scientific(Shenzhen)Co.Ltd.Shenzhen 518057China R&D Center Lifevalve Medical Scientific Co.Ltd.Shenzhen 518057China

Expanded polytetrafluoroethylene(ePTFE)is promising in biomedical fields such as covered stents and plastic surgery owing to its excellent biocompatibility and mechanical ***,ePTFE material prepared by the traditional biaxial stretching process is with thicker middle and thinner sides due to the bowing effect,which poses a major problem in industrial-scale *** solve this problem,we design an olive-shaped winding roller to provide the middle part of the ePTFE tape with a greater longitudinal stretching amplitude than the two sides,so as to make up for the excessive longitudinal retraction tendency of the middle part when it is transversely *** as-fabricated ePTFE membrane has,as designed,uniform thickness and node-fibril *** addition,we examine the effects of mass ratio of lubricant to PTFE powder,biaxial stretching ratio and sintering temperature on the performance of the resultant ePTFE ***,the relation between the internal microstructure of the ePTFE membrane and its mechanical properties is *** stable mechanical properties,the sintered ePTFE membrane exhibits satisfactory biological *** make a series of biological assessments including in vitro hemolysis,coagulation,bacterial reverse mutation and in vivo thrombosis,intracutaneous reactivity test,pyrogen test and subchronic systemic toxicity test;all of the results meet the relevant international *** muscle implantation of the sintered ePTFE membrane into rabbits indicates acceptable inflammatory reactions of our sintered ePTFE membrane fabricated on industrial *** a medical-grade raw material with the unique physical form and condensed-state microstructure is expected to afford an inert biomaterial potentially for stent-graft membrane.

关键词： biomedical polymer medical-grade raw material expanded polytetrafluoroethylene olive roller polymer processing biaxial stretching

来源：评论

学校读者我要写书评

暂无评论

Evolution of Nuvoton Microcontroller-based Education Board

引用

recent Patents on engineering 2024年第9期18卷 127-139页

作者： Elp, Hudaverdi Emin Inan, remzi Assan EMS Technologies R&D Research and Development Istanbul Umraniye Turkey Department of Electric and Electronics Engineering Faculty of Technology Isparta University of Applied Sciences Isparta Turkey

Background: The novel coronavirus pandemic has not only affected people's health. The pandemic has also affected their social life and work. For all the reasons mentioned, international trade has suffered and is still in the process of recovery. Objective: Especially in the semiconductor industry, many manufacturers postponed their deliveries to future periods and this triggered the chip crisis. Many hightech industries, including the automotive industry, were deeply affected by the consequences of the crisis, with factories halting or slowing down production. despite the shortage of chip stocks, Nuvoton has a large amount of Microcontroller Units (MCUs), but due to the shortage of resources, education and libraries, software developers have not been able to integrate their products in a limited time. Methods: In this paper, the Nuvoton Education Board has presented 20 common examples for embedded software developers and beginners. results: The PCB is designed considering all modules connected to separate General Purpose Input Output (GPIO) pins to make multiple module examples without changing the peripherals and pin configuration of the MCU. Clock configuration has been simplified and unnecessary details have been meticulously removed to make the examples easily understandable. Nuvoton NuMaker M263KI V1.3 was added on the designed PCB. Conclusion: The PCB contains almost all the necessary electronics to learn embedded software and use Nuvoton MCUs in industrial projects. The board is supported with user interfaces and printed documentation. The codes are explained with command lines to teach users even small details. A patent application has been filed for the proposed education board. © 2024 Bentham Science Publishers.

关键词： Embedded systems

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：