检索结果-内蒙古大学图书馆

20th European Conference on Composite materials: Composites Meet Sustainability, ECCM 2022

作者： Badeghaish, Wael Wagih, Ahmed Seraj, Muhamed Lubineau, Gilles Physical Science and Engineering Division Mechanical Engineering Program Laboratory of Mechanics of Composites for Energy and Mobility Thuwal23955 Saudi Arabia

ISBN: (纸本)9782970161400

Polymeric composites have been used to replace metals in many onshore and offshore applications due to their corrosion resistance. Transporting petrochemical gases and acids via composite materials at high pressure and temperature represents a challenge because the lack of confidence in such aggressive environments. Therefore, understanding the change in the physical and mechanical properties in polymeric composites under aggressive oil conditions is essential for providing novel designs and materials for these applications. This work presents a short literature review on the challenges facing application of polymeric composites in the oil and gas downhole aggressive corrosion environment. Moreover, it presents preliminary inspection on the integrity of a thermoplastic polymer (PEEK) subjected to HCl (0.8 Ph) at high temperatures (50 and 100 °C) for 14 days. The preliminary results demonstrated the good chemical resistance of PEEK at high temperature. Moreover, there was no effect on the mechanical properties of the PEEK at these conditions. ©2022 Wael et al.

关键词： Corrosion resistance

来源：评论

学校读者我要写书评

暂无评论

Phase separation and domain crystallinity control enable open-air-printable highly efficient and sustainable organic photovoltaics

引用

InfoMat 2024年第3期6卷 131-143页

作者： Jie Lv Xiaokang Sun Hua Tang Fei Wang Guangye Zhang Liangxiang Zhu Jiaming Huang Qianguang Yang Shirong Lu Gang Li Frédéric Laquai Hanlin Hu Hoffmann Institute of Advanced Materials Shenzhen Polytechnic UniversityShenzhenthe People's Republic of China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhenthe People's Republic of China School of Materials Science and Engineering Xiangtan UniversityXiangtanthe People's Republic of China KAUST Solar Center Physical Sciences and Engineering Division(PSE)Materials Science and Engineering Program(MSE)King Abdullah University of Science and Technology(KAUST)ThuwalKingdom of Saudi Arabia College of New Materials and New Energies Shenzhen Technology UniversityShenzhenthe People's Republic of China Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityHong Kong SARthe People's Republic of China Department of Material Science and Technology Taizhou UniversityTaizhouthe People's Republic of China

Organic solar cells(OSCs)have emerged as a promising solution for sustainable energy production,offering advantages such as a low carbon footprint,short energy payback period,and compatibility with ***,the use of hazardous solvents continues to dominate the best-performing OSCs,mainly because of the challenges of controlling phase separation and domain crystallinity in *** this study,we combined the solvent vapor treatment of CS2 and thermal annealing to precisely control the phase separation and domain crystallinity in PM6:M-Cl and PM6:O-Cl systems processed with the eco-solvent *** method resulted in a maximum power conversion efficiency(PCE)of 18.4%,which is among the highest values reported for sustainable binary ***,the fabrication techniques were transferred from spin coating in a nitrogen environment to blade printing in ambient air,retaining a PCE of 16.0%,showing its potential for high-throughput and scalable *** addition,a comparative analysis of OSCs processed with hazardous and green solvents was conducted to reveal the differences in phase *** work not only underscores the significance of sustainability in OSCs but also lays the groundwork for unlocking the full potential of open-air-printable sustainable OSCs for commercialization.

关键词： open-air printable organic solar cells sustainability

来源：评论

学校读者我要写书评

暂无评论

A Comparative Study of the Effect of Compounding Methods and Processing of PLA/GNPs on the Micromorphology and Electrical Conductivity 38

A Comparative Study of the Effect of Compounding Methods and...

引用

38th Technical Conference of the American Society for Composites, ASC 2023

作者： Anurakparadorn, Kanat Taub, Alan Department of Materials Science and Engineering Macromolecular Science and Engineering Program University of Michigan 2300 Hayward St Ann ArborMI48109 United States Department of Mechanical Engineering University of Michigan 2350 Hayward St Ann ArborMI48109 United States

ISBN: (纸本)9781605956916

In this work, the effects of different compounding and processing techniques on the DC electrical conductivity and density of polylactic acid (PLA)/graphene nanoplatelets (GNPs) composites were studied. It is found from the study that compounding by solution mixing via an ultrasonication technique can provide slightly higher DC electrical conductivity after compression molding than mixing through a twin-screw extruder due to better dispersion quality. In addition, a composite pellet from twin screw extrusion showed a slight increase in DC electrical conductivity and anisotropy when processed by filament extrusion due to the shear alignment of GNPs during the extrusion. The fused deposition modeling (FDM) process yields high anisotropy because the crystallization along the printing path allows gaps and polymer coating between the extruded lines and layers. It was found that the 7.5 wt% GNPs composites exhibited the best properties because it provides the best dispersion quality to meet the percolation threshold. Furthermore, the micromorphology of each sample was also studied to observe the dispersion and porosity inside the composite provided by each fabrication technique. This study can be used as a reference for compounding and processing techniques. © 2023 by DEStech Publications, Inc. and American Society for Composites. All rights reserved.

关键词： Mixing

来源：评论

学校读者我要写书评

暂无评论

Effect of strain-induced precipitation on microstructure and properties of titanium micro-alloyed steels

引用

Journal of Iron and Steel Research International 2022年第6期29卷 983-993页

作者： Xiang-dong Huo Zhi-wei Lv Chen Ao Lie-jun Li Ji-nian Xia Song-jun Chen School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640GuangdongChina Iron and Steel Research Institute Shandong Iron and Steel Group Rizhao Co.Ltd.Rizhao 276826ShandongChina

The strain-induced precipitation behavior of titanium micro-alloyed steel was examined through the stress relaxation *** addition,the relationship between strain-induced precipitation and isothermal precipitation was *** findings revealed that the strain-induced precipitation and recrystallization processes of titanium micro-alloyed steel coexist and compete at the same *** results also showed that the recrystallization process was inhibited with straininduced ***,a large amount of nano-sized TiC particles precipitated in Ti micro-alloyed ***,the strain-induced precipitated TiC had a size of 10 nm and isothermally precipitated TiC had a size of 3–6 ***,there was a clear competitive relationship between strain-induced precipitation and isothermal *** findings also showed that strain-induced precipitation had an obvious effect on the refinement of austenite although the effect was not obvious on the increase in the yield ***,isothermal treatment was shown to be more advantageous than strain-induced ***,the major increase in the yield strength was mainly attributed to the precipitation strengthening of nano-sized TiC during isothermal precipitation.

关键词： Ti micro-alloyed steel Stress relaxation Nanometer-carbide Strain-induced precipitation Isothermal precipitation

来源：评论

学校读者我要写书评

暂无评论

A Player Position Tracking Method Based on a Wide-Area Pan-Tilt-Zoom Video 12

A Player Position Tracking Method Based on a Wide-Area Pan-T...

引用

Proceedings of the 12th International Conference on Sport sciences Research and Technology Support, icSPORTS 2024

作者： Yamagishi, Shunzo Xie, Chun Shishido, Hidehiko Kitahara, Itaru Master's and Doctoral Program in Intelligent Mechanical Interaction Systems University of Tsukuba Ibaraki Japan Center for Computational Sciences University of Tsukuba Ibaraki Japan Faculty of Science and Engineering Department of Information Systems Engineering Soka University Tokyo Japan

ISBN: (纸本)9789897587191

This paper proposes a method to estimate the posture of an athlete moving on a vast field in a sporting event using a pan-tilt-zoom camera. In order to estimate the posture of an athlete on a sports field from a dynamic video sequence, our method extracts image features to search correspondence points among successive frames and computes the homography transformation matrix that compensates for changes the camera parameters (e.g., angle of view and posture). The effectiveness of this method is qualitatively verified using MLB TV broadcast video. The accuracy and error factors are also quantitatively verified by CG simulation. Copyright © 2024 by SCITEPRESS - science and Technology Publications, Lda.

关键词： Pan-Tilt-Zoom Camera Player Tracking Sports Analytics Video Processing Wide-Area

来源：评论

学校读者我要写书评

暂无评论

A Kinetic Theory for the Mechanics and Remodeling of Transient Anisotropic Networks

SSRN

引用

SSRN 2024年

作者： Vernerey, Franck J. Rezai, Behnam Lamont, Samuel C. Department of Mechanical Engineering Program of Materials Science and Engineering University of Colorado Boulder United States

We present a statistically-based theoretical framework to describe the mechanical response of dynamically cross-linked semi-flexible polymer networks undergoing finite deformation. The theory starts from a statistical description, via a distribution function, of the chain conformation and orientation. Assuming a so-called tangent affine deformation of the chains, this distribution is then allowed to evolve in time due to a combination of elastic network distortion and a permanent chain reconfiguration enabled by dynamic cross-links. After presenting the evolution law for the chain distribution function, we reduce the theory to the evolution of the network conformation tensor in both its natural and current state. With this model, we use classical thermodynamics to determine how the stored elastic energy, energy dissipation, and true stress evolve in terms of the network conformation. We show that the model degenerates to classical anisotropic hyperelastic models when cross-links are permanent, while we recover the classical form of the transient network theory (that describes hyper-viscoelasticity) when chains are fully flexible. Theoretical predictions are then illustrated and compared to the literature for both basic model problems and biomechanically relevant situations. © 2024, The Authors. All rights reserved.

关键词： Statistical mechanics

来源：评论

学校读者我要写书评

暂无评论

A comparative study on design standards of screw conveyors in China,Germany and the USA-PartⅠ:Theoretical calculation and quantitative analysis

引用

Particuology 2022年第10期20卷 61-76页

作者： Yuan Tan Michael Rackl Weijie Yang Johannes Fottner Wenjun Meng Stephan Kessler Technical University of Munich Chair for Materials HandlingMaterial FlowLogisticsGarchingGermany Ibracon-Ingenieurbiiro Dr.-Ing.Rackl ZornedingGermany School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuanShanxiChina

Screw conveyors,widely used devices for transporting bulk materials,play an irreplaceable role in the modern industrial *** of their traditional advantages,designers of screw conveyors still heavily rely on their own country's experiments and standards,which are closely related to empirical ***,the same conveying task often results in different *** work aims to compare the design standards of screw conveyors in China,Germany and the *** on related standards acquired from renowned associations in the three countries,the similarities and particularities of these design guidances are *** preforming the geometrical and operational designs for horizon-tal,slightly inclined and vertical conveyance of three representative bulk solids(barley,lignite,sand),the advantages and disadvantages of these semi-empirical designs are comprehensively ***-thermore,the potential influence of empirical coefficients,which are not explicitly documented,are extensively *** analysing all outcomes,the compatibility and applicability of each standard are qualitatively assessed.

关键词： Design standard Screw conveyor Screw feeder Screw auger Bulk solids

来源：评论

学校读者我要写书评

暂无评论

Hydrogen-bonded green box-based host-guest complexes on g-C3N4 composites for enhanced visible-light photocatalysis

引用

science China Chemistry 2025年

作者： Yawen Li Naiyao Li Tianle Cao Yujing Gao Chenjing Liu Zengrong Wang Ni Yan Guoping Li Qinghui Guo Gang He Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Electronic Devices and Material ChemistryEngineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi ProvinceXi'an Jiaotong University School of Materials Science and Engineering Chang'an University Department of Chemistry Tsinghua University

A series of novel host-guest complexes were synthesized using selenoviologen-based tetracationic cyclophane 1 （green box） and various electron-rich guests （G1,G2,G3,and G4）.These complexes demonstrated high binding affinity and favorable redox properties due to the unique structural characteristics of *** transient absorption （fs-TA） spectroscopy revealed that the host-guest complexes exhibited efficient charge separation and enhanced electron *** complexes were subsequently assembled onto the surface of graphitic carbon nitride （g-C3N4） through hydrogen bonding interactions between the hydroxyl groups of the guests and the amino groups of g-C3N4,forming a series of functionalized composite *** assembly strategy facilitated the incorporation of the green box onto the g-C3N4surface,leading to rapid photoinduced electron transfer （PET） and a significant delay in charge *** a result,the photocatalytic hydrogen production efficiency was markedly ***,the g-C3N4/1?G4/Pt composites achieved the highest efficiency for visible-light-driven hydrogen evolution,exhibiting a higher H2evolution rate (2765μmol g-1h-1),an apparent quantum yield（AQY） of 1.08×10-2,turnover number （TON） of 216 and turnover frequency （TOF） of 1.5×10-2s-1,with a production rate six times greater than that of unmodified g-C3N4/Pt composites.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Application of Chaotic Encryption and Decryption in Wireless Transmission From Sensory Toolholders on Machine Tools

引用

IEEE Sensors Journal 2023年第11期23卷 11453-11468页

作者： Lin, Chi-Yuan Wu, Shu-Cing Kuo, Ping-Huan Huang, Meng-Jun Hong, Song-Wei Yau, Her-Terng National Chin-Yi University of Technology Department of Electronic Engineering Taichung411030 Taiwan National Chin-Yi University of Technology Prospective Technology of Electrical Engineering and Computer Science Program Taichung411030 Taiwan Chiayi62102 Taiwan National Chung Cheng University Department of Mechanical Engineering Chiayi62102 Taiwan

In recent years, several industries have increased their demand for processing precision, automatic detection, and visualization interfaces. Therefore, to keep pace with the fourth industrial revolution, machine tool operators install a large number of sensors on machine tools to obtain more precise physical quantities during processing and use a variety of sensors to obtain measurements in various situations. However, these additional sensors on machine tools result in complicated wire layouts, which exhibit negative effects on processing. Such problems lead to the birth of wireless data transmission, which is expected to become the new standard in the future. At present, there is more and more interactive integration between relevant embedded system and the machine tool, which allows information communication between each other in the wireless domain. However, generally, the majority of machine tool operators focus on optimizing the sensing conditions during processing, but they disregard the importance of information security. In the current era of the Internet of Things (IoT), information security is regarded as a crucial factor. For the wireless communication between the IoT equipment for each machine in the machining field, the transmitted data are almost exposed within public space directly due to the loss in constraint and protection of physical wiring. Therefore, such a process can easily be intercepted by other devices that capture information on relevant status of the machine or command messages received by the controller, where intentional individual may possibly control the operating mechanism and progress of entire plant. This leads to theft of relevant secrets in manufacturing technology for the subject company, or intentional shutdown, machine damage, and vicious blackmailing attacks. Therefore, introducing the mechanism of safety protection during wireless signal transmission is an inevitable technology to maintain the company interests and also the

关键词： Synchronization

来源：评论

学校读者我要写书评

暂无评论

INTER- AND INTRA-LAMINAR PROPERTIES OF AN AFP POST-PROCESSED THERMOPLASTIC COMPOSITE

INTER- AND INTRA-LAMINAR PROPERTIES OF AN AFP POST-PROCESSED...

引用

SAMPE 2024 Conference and Exhibition

作者： Yap, Timothy S. Heathman, Nathaniel M. Kirchhoff, Joseph G. Tehrani, Mehran Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX United States Department of Structural Engineering University of California La Jolla San DiegoCA United States Program in Materials Science and Engineering University of California La Jolla San DiegoCA United States

ISBN: (纸本)9781934551455

Transitioning to high-performance thermoplastic composites (TPCs) carries great potential due to their enhanced toughness, ease of repairability, and the possibility of bypassing the need for autoclaves that are essential for curing thermosetting composites. Full consolidation of parts may be achieved in-situ using automated fiber placement (AFP) at slow rates;alternatively, with higher rates, consolidation may only occur following vacuum-bag oven processing (vacuum-bag only or VBO) or compression molding (CM) post-processing. This study investigates the CM of AFP carbon fiber LM-PAEK™ composites at a low pressure of 0.2 MPa to simulate VBO post-processing, focusing on their intra- and inter-laminar behavior. Short-beam strength, fracture toughness modes I and II, and transverse tensile and compressive samples were manufactured via AFP using a fast layup rate, followed by low-pressure CM. As compared to previous studies, post-processing resulted in greater interlaminar bonding. This study demonstrates the viability of TPCs for the next generation of aerospace structures with a relatively simple oven post-processing. © 2024 Soc. for the Advancement of material and Process engineering. All rights reserved.

关键词： Compression molding

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：