检索结果-内蒙古大学图书馆

Smart Materials in Manufacturing 2023年 1卷

作者： Cai, Lei Guo, Hao-Ran Zhu, Yong-Qiang Du, Fu-Sheng Qi, Jian-Tao Cui, Lan-Yue Liu, Cheng-Bao Zeng, Rong-Chang Corrosion Laboratory for Light Metals School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China College of New Energy China University of Petroleum (East China) Qingdao 266580 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China

The physiological environment of the human body is an extremely complex system, containing not only inorganic ions but also organic molecules;thus it is necessary to understand the influences of the different functional groups of three six-carbon small organic molecules (glucose (Glu), vitamin C (Vc), and citric acid (CA)) on the degradation mechanisms of pure magnesium (Mg). Electrochemical polarization and impedance spectroscopy, hydrogen evolution rates, and pH monitoring tests were used to characterize the degradation behaviors of pure Mg in 0.9 wt% NaCl and phosphate-buffered saline (PBS) solutions. Using scanning electron microscopy, energy-dispersive spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, the compositions, phase structures, and morphologies of the degradation products were investigated. Results indicated that Glu enhanced the biodegradation rate of pure Mg in 0.9 wt% NaCl solution, whereas Vc and CA slowed down their biodegradation rate. In the PBS solution, both Glu and Vc reduced the biodegradation rate of pure Mg, while CA accelerated its initial biodegradation and retarded its long-term biodegradation. In addition, Raman spectroscopy demonstrated the formation of Mg-(gluconate, L-threonic acid, oxalate, and citrate) on the pure Mg. Plausible biodegradation mechanisms of pure Mg are proposed regarding the influences of Glu, Vc, and CA. © 2023 The Authors

关键词： Citric acid Corrosion Degradation Glucose Magnesium Vitamin C

来源：评论

学校读者我要写书评

暂无评论

Correction to:Influence of Electroshocking Treatment on Microstructure and Mechanical Properties of Ti‑6.5Al‑3.5Mo‑1.5Zr‑0.3Si Thin‑Wall Specimen Manufactured by Laser Melting Deposition

引用

Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1924-1924页

作者： Yan Wen Xuan Sun Jian Zhou Bingliang Liu Haojie Guo Yuxin Li Fei Yin Liqiang Wang Lechun Xie Lin Hua Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan 430070China Hubei Longzhong Laboratory Xiangyang 441000China Shanghai Aircraft Manufacturing Co. Ltd.Commercial Aircraft Corporation of ChinaLtd.Shanghai 201324China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Correction to:Acta Metallurgica Sinica(English Letters)https://***/10.1007/s40195-023-01576-x In the original publication,the afiliation citation appears *** corrected affiliation citation should read as below.

关键词： Microstructure Manufacture shock

来源：评论

学校读者我要写书评

暂无评论

Statics analysis for automotive rope-wheel glass regulator

Statics analysis for automotive rope-wheel glass regulator

引用

2020 International Conference on Mechatronics technology and Intelligent Manufacturing, ICMTIM 2020

作者： Chen, Mingzhang Xiong, Xiaoshuang Zhuang, Wuhao Chen, Zhongbao School of Automotive Engineering Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automobile Components Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Wuhan430200 China School of Mechanical Engineering and Automation Wuhan Textile University Wuhan430200 China

Analyzing strength, stiffness, fatigue and wear of automotive rope-wheel glass regulator (glass regulator for short) and optimizing structure of glass regulator benefit improving working stability. Before analyzing strength, stiffness, fatigue and wear, statics analysis is necessary to be taken for investigating stress and displacement of key parts. Statics theoretical and finite element analysis of glass regulator in three kinds of working conditions (locked-rotor on the top dead center, locked-rotor on the bottom dead center, normal working) are taken. Results suggest that concentrated stress and large displacement mainly exist on guide rail. The concentrated stress also exists on slider, guide pulley and motor plate, but maximum stress value and large displacement risk on them are small. Statics analysis provides analysis of strength, stiffness, fatigue and wear with support on data and offers driving data for optimizing structure of glass regulator. © 2020 Institute of Physics Publishing. All rights reserved.

关键词： Glass

来源：评论

学校读者我要写书评

暂无评论

Effect of Prior Cold Deformation on the Stability of Retained Austenite in GCr15 Bearing Steel

引用

Acta Metallurgica Sinica(English Letters) 2019年第1期32卷 107-115页

作者： Feng Wang Dong-Sheng Qian Xiao-Hui Lu School of Materials Science and Engineering Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive Engineering Wuhan University of Technology

In this work, the effect of prior cold deformation on the stability of retained austenite in GCr15 bearing steel was investigated after quenching and tempering treatment. The thermal stability was evaluated by calculating thermal activation energy for decomposition of retained austenite using differential scanning calorimeter. The mechanical stability was investigated according to the strain-induced martensitic transformation behavior of retained austenite under the standard compression testing. It is found that the prior cold deformation not only accelerates the carbide dissolution during the austenitization process but also contributes to the carbon partitioning in the tempering stage due to the higher density of phase boundaries, which results in the improvement of the thermal stability of retained austenite. Due to the enhanced carbide dissolution, the higher carbon content in the prior austenite will intensify the isotropic strain of martensitic transformation. As a consequence, the film-like retained austenite is likely to form under a higher hydrostatic pressure and thus shows a higher mechanical stability. Additionally, it is noteworthy that the benefits of the prior cold deformation to the stability of retained austenite would be saturated when the cold deformation degree is larger than 40%.

关键词： GCr15 bearing steel Prior cold deformation Retained austenite stability

来源：评论

学校读者我要写书评

暂无评论

Temperature field evolution and heat transfer during continual local induction cladding

引用

Journal of Central South University 2020年第5期27卷 1572-1586页

作者： LIU Si-yu QIN Xun-peng ZHANG Jin-peng ZHAN Jun Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan 430070China Hubei Sanhuan Intelligent Technology Co. Ltd.Wuhan 430074China

The evolution of temperature field of the continual motion induction cladding and the depth of heat affected zone are studied in this study.A three-dimensional finite element model for the point type continual induction cladding is established to investigate temperature distributions of fixed and motion induction cladding *** novel inductor is designed for cladding of curved *** modeling reliability is verified by the temperature *** influence of process parameters on the maximum temperature and the generation and transfer of heat are *** calculation is performed to its melting rate to verify the temperature distribution and *** results show that a good metallurgical bond can be formed between the cladding layer and *** melting rate gradually falls from the top of the cladding layer to the substrate,and the grain size in the substrate gradually *** heat affected zone is relatively small compared to integral heating.

关键词： profile repair induction cladding continual motion temperature field evolution heat transfer

来源：评论

学校读者我要写书评

暂无评论

In-situ growth of ruthenium-iridium oxides on reduced graphene oxide for acidic oxygen evolution electrocatalysis

引用

Fuel 2025年 400卷

作者： Zhang, Bohan Wen, Chang Xu, Mingtao Ye, Zhaoxi Chen, Wenshang Chen, Ben Hu, Runze Wang, Dapeng Tu, Zhengkai Wuhan430074 China Wuhan430074 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

Proton exchange membrane water electrolysis (PEMWE) is considered to be an ideal energy conversion technology for large-scale utilization of intermittent renewable energy sources in the future. A critical aspect for the widespread adoption of PEMWE is ensuring the activity and stability of the oxygen evolution reaction (OER) electrocatalyst while also reducing the cost of the electrocatalysts. Here, we report the synthesis of RuxIr1-xO2/rGO using reduced graphene oxide as a support, with Ir-Ru bimetallic oxides and oxygen vacancies synergistically enhancing the catalytic performance. The catalyst was synthesized via an ion exchange/activation method and prepared using the critical point drying (CPD) method. While ensuring the high conductivity of ultra-thin stacked graphene, it also synergizes the powerful OER catalytic capabilities of Ru/Ir oxide-based nanostructures with the increased electrochemical active surface area and oxygen vacancies. These have been confirmed through tests of TEM, BET, EPR, XPS, and AFM. The Ru0.75Ir0.25O2/rGO with best performance exhibited the overpotential of only 171 mV at 10 mA cm−2 in a three-electrode system. Meanwhile, Ru0.75Ir0.25O2/rGO also demonstrated excellent performance in a single cell system, with a cell voltage of only 1.524 V at 1 A cm−2, and it was able to operate for 300 h. These findings provide valuable insights for the rational design of high performance acidic OER electrocatalysts and demonstrate the potential in advancing practical PEM water electrolysis. © 2025 Elsevier Ltd

关键词： Solar fuels

来源：评论

学校读者我要写书评

暂无评论

Artificial neural network based optimization of a six-step two-bed pressure swing adsorption system for hydrogen purification

引用

Energy and AI 2021年第3期5卷 38-52页

作者： Liang Tong Pierre Bénard Yi Zong Richard Chahine Kun Liu Jinsheng Xiao Reliability Engineering Institute School of Energy and Power EngineeringWuhan University of TechnologyWuhanHubei 430063China Hubei Research Center for New Energy&Intelligent Connected Vehicle and Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive EngineeringWuhan University of TechnologyHubei 430070China Hydrogen Research Institute Universitédu QuébecàTrois-RivièresQuebec G8Z 4M3Canada Center for Electric Power and Energy Department of Electrical EngineeringTechnical University of Denmark4000RoskildeDenmark Green Island Environment and Resources Institute School of Architectural and Civil EngineeringShenyang City UniversityLiaoning 110112China

The pressure swing adsorption(PSA)system is widely applied to separate and purify hydrogen from gaseous *** extended Langmuir equation fitted from the extended Langmuir-Freundlich isotherm has been used to predict the adsorption isothermal of hydrogen and methane on the zeolite 5A adsorbent bed.A six-step two-bed PSA model for hydrogen purification is developed and validated by comparing its simulation results with other *** effects of the adsorption pressure,the P/F ratio,the adsorption step time and the pressure equalization time on the performance of the hydrogen purification system are studied.A four-step two-bed PSA model is taken into consideration,and the six-step PSA system shows higher about 13%hydrogen recovery than the four-step PSA *** performance of the vacuum pressure swing adsorption(VPSA)system is compared with that of the PSA system,the VPSA system shows higher hydrogen purity than the PSA *** on the validated PSA model,a dataset has been produced to train the artificial neural network(ANN)*** effects of the number of neurons in the hidden layer and the number of samples used for training ANN model on the predicted performance of ANN model are ***,the well-trained ANN model with 6 neurons in the hidden layer is applied to predict the performance of the PSA system for hydrogen ***-objective optimization of hydrogen purification system is performed based on the trained ANN *** artificial neural network can be considered as a very effective method for predicting and optimizing the performance of the PSA system for hydrogen purification.

关键词： Hydrogen purification Pressure swing adsorption Isotherm Artificial neural network Machine learning Optimization

来源：评论

学校读者我要写书评

暂无评论

Mechanisms of crack elimination in directed energy deposited MAR M247 superalloy and effects of laser power on microstructural evolution and mechanical properties

引用

Materials Today Communications 2025年 46卷

作者： Chen, Mingzhang Liu, Xunchen Wang, Yitong Hua, Lin Hu, Zeqi School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan430070 China

MAR M247 is a directionally solidified nickel-based superalloy with excellent high-temperature performance, but it suffers from severe cracking issues during the directed energy deposition (DED) process. Currently, much of the research on crack suppression in nickel-based superalloy has focused on IN738 and Hastelloy X, with limited studies specifically addressing the cracking suppression mechanisms for M247. This study investigates the mechanisms of crack elimination in M247 and the influence of laser power on its microstructural evolution and mechanical properties. Thermodynamic calculations indicate that M247 has higher crack sensitivity indices than IN718 and IN738, making crack suppression a critical challenge. By optimizing DED process parameters, particularly by reducing scan speed and increasing laser power, cracks were effectively eliminated. Numerical simulations reveal that these adjustments reduce thermal stress accumulation, thereby mitigating cracking. Microstructural characterization shows that increasing laser power minimizes internal defects, promotes a trend toward oriented grain growth, decreases transverse grain boundaries perpendicular to the deposition direction, reduces disorientation, promotes texture evolution, and increases Schmid factors. While tensile strength and microhardness remain largely unaffected, ductility is significantly improved. This paper provides valuable insights into crack elimination and mechanical property enhancement in additive manufactured nickel-based superalloy. © 2025 Elsevier Ltd

关键词： Tensile strength

来源：评论

学校读者我要写书评

暂无评论

Numerical Investigation of Effect of Mechanical Compression on the Transport Properties of Fuel Cell Microporous Layer Using a Pore-Scale Model

SSRN

引用

SSRN 2023年

作者： Zhang, Heng Hu, Hao Sarker, Mrittunjoy Shao, Xuanyu Zhan, Zhigang Sui, Pang-Chieh Chuang, Po-Ya Abel School of Low-Carbon Energy and Power Engineering China University of Mining and Technology Xuzhou221116 China Automobile Technology and Service College Wuhan City Polytechnic Wuhan430064 China Mechanical Engineering University of California Merced MercedCA95343 United States State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei430070 China Wuhan University of Technology China

The microporous layer (MPL) plays an important role in water and thermal management of proton exchange membrane fuel cells (PEMFCs). An in-depth investigation of the mechanical compression effect on transport properties in the MPL can help optimize cell performance and durability. In this work, the microstructure of the MPL is numerically reconstructed and the finite element method is applied to simulate mechanical behavior. In addition, the distribution of stress-strain, porosity, and pore size in the MPL under ten different levels of mechanical compression strains are studied. Lastly, the pore-scale model is employed to investigate the effective transport properties of the MPL as a function of compression strain. The analysis reveals that as the MPL strain increases from 0% to 40%, there is a 29% decrease in porosity, a 50% reduction in average pore diameter, a 60% decrease in effective gas diffusivity, a 100% increase in tortuosity, and an 80% increase in electrical and thermal conductivity. With the escalation of mechanical compression, both the magnitude and uniformity of stress-strain-displacement concurrently rise. This phenomenon is most prominently observed on the MPL surface. Mechanical compression strains below 20% exhibit a lesser impact on transport properties. Beyond this threshold, exceeding the 20% compression strain point, mechanical stress assumes a critical role in influencing MPL transport properties. This study offers a comprehensive overview of the impact of mechanical stress on the internal stress-strain relationship and transport properties of MPLs. The results provide valuable guidance for future MPL design and optimization of fuel cell performance. © 2023, The Authors. All rights reserved.

关键词： Pore size

来源：评论

学校读者我要写书评

暂无评论

Communication-Efficient MARL for Platoon Stability and Energy-efficiency Co-optimization in Cooperative Adaptive Cruise Control of CAVs

arXiv

引用

arXiv 2024年

作者： Hua, Min Chen, Dong Jiang, Kun Zhang, Fanggang Wang, Jinhai Wang, Bo Zhou, Quan Xu, Hongming The School of Engineering University of Birmingham Birmingham United Kingdom The Environmental Institute & Link Lab & Computer Science University of Virginia VA United States The School of Automation Southeast University Nanjing China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China The Automotive New Technology Research Institute BYD Auto Shenzhen China The School of Automotive Studies Tongji University Shanghai China

Cooperative adaptive cruise control (CACC) has been recognized as a fundamental function of autonomous driving, in which platoon stability and energy efficiency are outstanding challenges that are difficult to accommodate in real-world operations. This paper studied the CACC of connected and autonomous vehicles (CAVs) based on the multi-agent reinforcement learning algorithm (MARL) to optimize platoon stability and energy efficiency simultaneously. The optimal use of communication bandwidth is the key to guaranteeing learning performance in real-world driving, and thus this paper proposes a communication-efficient MARL by incorporating the quantified stochastic gradient descent (QSGD) and a binary differential consensus (BDC) method into a fully-decentralized MARL framework. We benchmarked the performance of our proposed BDC-MARL algorithm against several several non-communicative and communicative MARL algorithms, e.g., IA2C, FPrint, and DIAL, through the evaluation of platoon stability, fuel economy, and driving comfort. Our results show that BDC-MARL achieved the highest energy savings, improving by up to 5.8%, with an average velocity of 15.26 m/s and an inter-vehicle spacing of 20.76 m. In addition, we conducted different information-sharing analyses to assess communication efficacy, along with sensitivity analyses and scalability tests with varying platoon sizes. The practical effectiveness of our approach is further demonstrated using real-world scenarios sourced from open-sourced OpenACC. Copyright © 2024, The Authors. All rights reserved.

关键词： Energy efficiency

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：