检索结果-内蒙古大学图书馆

Interconnected microstructure and flexural behavior of Ti_(2)C-Ti composites with superior Young’s modulus

International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 2088-2101页

作者： Fengbo Sun Rui Zhang Fanchao Meng Shuai Wang Lujun Huang Lin Geng School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Waikato Centre for Advanced Materials and Manufacturing School of EngineeringUniversity of WaikatoHamilton 3240New Zealand State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001China

To enhance the Young’s modulus(E)and strength of titanium alloys,we designed titanium matrix composites with intercon-nected microstructure based on the Hashin-Shtrikman *** to the results,the in-situ reaction yielded an interconnected microstructure composed of Ti_(2)C particles when the Ti_(2)C content reached 50vol%.With widths of 10 and 230 nm,the intraparticle Ti lamellae in the prepared composite exhibited a bimodal size distribution due to precipitation and the unreacted Ti phase within the grown Ti_(2)C *** composites with interconnected microstructure attained superior properties,including E of 174.3 GPa and ultimate flexural strength of 1014 *** with that of pure Ti,the E of the composite was increased by 55% due to the high Ti_(2)C content and interconnected *** outstanding strength resulted from the strong interfacial bonding,load-bearing capacity of interconnected Ti_(2)C particles,and bimodal intraparticle Ti lamellae,which minimized the average crack driving *** flexural tests revealed preferential crack initiation along the{001}cleavage plane and grain boundary of Ti_(2)C in the region with the highest tensile *** addition,the propagation can be efficiently inhibited by interparticle Ti grains,which prevented the brittle fracture of the composites.

关键词： titanium matrix composites titanium carbide interface Young’s modulus flexural behavior

来源：评论

学校读者我要写书评

暂无评论

Optical image encryption based on computational ghost imaging 4

Optical image encryption based on computational ghost imagin...

引用

4th International Conference on Laser, Optics, and Optoelectronic technology, LOPET 2024

作者： Zhu, Qilin Xu, Shuang Ke, Yousheng Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9781510681903

This paper proposes an optical image encryption method based on RNA encoding and computational ghost imaging. Four sets of random sequences obtained from Chen's hyperchaotic system are used to construct the speckle matrix required for calculating the ghost imaging system. The initial values of the hyper chaotic system is provided by encrypted images, by which one image corresponds to one encryption is achieved. RNA codons are used to encode and calculate the chaotic sequence, increasing the key space and improving the security of the system. The speckle matrix and target image are inputted into the computational ghost imaging system, as RNA encoding and codon substitution on the image received by the barrel detector are performed to obtain an encrypted image. This method effectively reduces the size of transmitted keys, improves transmission efficiency, and enhances the security of the system. It has certain reference and reference significance for optical based image transmission and encryption. © 2024 SPIE.

关键词： Imaging systems

来源：评论

学校读者我要写书评

暂无评论

Electrochemical drilling of small holes by regulating in real-time the electrolyte flowrate in multiple channels

引用

Chinese Journal of Aeronautics 2022年第5期35卷 470-483页

作者： Jinxing LUO Xiaolong FANG Tao YANG Di ZHU National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Electrochemical drilling(ECD)provides an alternative technique for drilling multiple small holes in difficult-to-machine materials in numerous industrial applications such as for *** value and fluctuation of electrolyte flowrate can seriously affect the machining stability and hole quality in *** particular,when drilling multiple holes,the distribution and fluctuations of the electrolyte flowrate in each channel could influence the uniformity of the electrolyte flowrate among multiple tube electrodes,thereby affecting the machining stability and the maximum feed ***,an eight-channel flow control system was developed to measure and regulate in real time the electrolyte flowrate supplied into each individual tube *** paper proposes ECD of small holes with real-time flowrate control to improve the uniformity of electrolyte flowrate in each tube electrode and reduce the fluctuations in the electrolyte *** single-hole drilling,when the electrolyte flowrate was regulated in real time,the hole quality and machining stability were considerably better than without *** is because the electrolyte flowrate remains basically constant,which stabilizes the flow ***,by considering the hole profile,it was found that an electrolyte flowrate of 200.0 m L/min can be acceptable for ECD of small *** the eight-channel flow control system was used in multiple-hole drilling,the uniformity of the electrolyte flowrate in each tube electrode was obviously improved,which led to a more stable ***,the maximum feed rate can attain 2.40 mm/min in multiple-hole *** on these findings,a matrix(5×32)of multiple small holes was successfully fabricated with a satisfactory diameter consistency,as the machining stability and machining efficiency had been enhanced.

关键词： Electrochemical drilling Small holes Electrolyte flowrate Real-time regulation Machining stability

来源：评论

学校读者我要写书评

暂无评论

Mask optimization framework based on diffusion model

Mask optimization framework based on diffusion model

引用

2024 International Conference on precision Instruments and Optical Engineering, PIOE 2024

作者： Lin, Kefan Xu, Shuang Song, Yabo Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9781510686120

A mask optimization method based on the diffusion model to establish a network framework through integration with a traditional ILT solver in order to mitigate the influence of the optical proximity effect (OPE). Meanwhile, the method can greatly accelerate the optimization process when the input mask pattern is huge and complex. The method initially divides the masks into different classes and learns their features separately using a diffusion model optimized with a specific probability transfer matrix. Subsequently, the learned coarsened masks are computed by the ILT solver to obtain the optimized masks. The simulation results indicate that this method can greatly accelerate the mask optimization process when faced with a large and complex input mask pattern. © 2024 SPIE.

关键词： Transfer matrix method

来源：评论

学校读者我要写书评

暂无评论

Analysis of scattering field characteristics for particles on coated wafer 4

Analysis of scattering field characteristics for particles o...

引用

4th International Conference on Laser, Optics, and Optoelectronic technology, LOPET 2024

作者： Zheng, Lijuan Xu, Shuang Liao, Cheng Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9781510681903

Since the rapid development of semiconductor industry, the key nodes keep shrinking and defect detection played a vital role in produce yield improvement. The dark filed detection method has been widely used for un-patterned wafer. In this paper, a model is built for calculating and analyzing the scattering field of particles as defect, based on which the measured configuration is optimized, including the incident angle, polarization and scattering collection channels. Simulation shows the measurement accuracy and precision are improved after the measured configuration optimization, and may provide a reference for further defect detection. © 2024 SPIE.

关键词： Semiconductor device manufacture

来源：评论

学校读者我要写书评

暂无评论

Detection of balling levels on the surface of SLM formed parts based on finite depth separable convolution network 3

Detection of balling levels on the surface of SLM formed par...

引用

2023 3rd International Conference of Non-Ferrous Materials, ICNFM 2023

作者： Qiu, He Jiang, Guozhang Lin, Xin Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

To meet the real-time requirements of balling levels detection in selective laser melting processes, a modified detection model, called Finite Depth Separable Convolution Network (F-DSCNet), is proposed by optimizing the existing benchmark model (BM) with two lightweight structures: Depth Separable Convolution (DSC) and Global Average Pooling (GAP). This model balances the effect of reducing model's parameters and increasing model's structural complexity brought by DSC on the computation and convergence speed of the model, and only introduces DSC in the higher-level convolution layers of the BM. In addition, the GAP structure is adopted instead of the fully connected layer to further reduce the number of parameters and accelerate model training and convergence. The experimental results show that the F-DSCNet model not only maintains high recognition accuracy but also significantly improves the model's computation and convergence speed, as well as the recognition response time of a single image, exhibiting strong practicality for engineering applications. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Convolution

来源：评论

学校读者我要写书评

暂无评论

Mask optimization based on conditional generative adversarial nets 4

Mask optimization based on conditional generative adversaria...

引用

4th International Conference on Electronics, Circuits and Information Engineering, ECIE 2024

作者： Chen, Hongting Xu, Shuang Lin, Kefan Song, Yabo Wuhan University of Science and Technology Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan430081 China Wuhan University of Science and Technology Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan430081 China Wuhan University of Science and Technology Precision Manufacturing Institute Wuhan430081 China

ISBN: (纸本)9798350388312

In order to ensure the manufacturability of the mask while optimizing the exposure pattern, a way to optimize mask based on conditional generative adversarial nets (CGAN) is proposed. By establishing the connection between the lithography model and the nets, we define the model of the generator and the discriminator, and input the target images into them as additional information in the network. After sufficient training, the result under this simple network is able to obtain the optimal mask, which has better mask quality and ensures better manufacturability compared to the unoptimized mask. © 2024 IEEE.

关键词： Masks

来源：评论

学校读者我要写书评

暂无评论

Belt conveyor roller bearing fault diagnosis based on CGM-MobileNet 5

Belt conveyor roller bearing fault diagnosis based on CGM-Mo...

引用

5th International Conference on Electronic Communication and Artificial Intelligence, ICECAI 2024

作者： Zeng, Fei Zhang, Xiaochuan Feng, Sheng Liu, Yukai Wuhan University of Science and Technology Key Laboratory of Metallurgical Equipment and Control of Ministry of Education Wuhan China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan China

ISBN: (纸本)9798350386943

Aiming at the problem of multiple working conditions and high noise of belt conveyor in the actual working environment, which leads to the low accuracy of roller bearing fault diagnosis, a CGM-MobileNet belt conveyor roller bearing fault diagnosis method based on CGM-MobileNet is proposed. Firstly, the original one-dimensional vibration signals are obtained from two-dimensional time-frequency image by Continuous Wavelet Transform(CWT), Gramian Angular Field(GAF) and Markov Transition Field(MTF) respectively, and spliced into three-channel two-dimensional time-frequency image;secondly, a lightweight convolutional neural network MobileNet is used as the fault classification network to ensure the diagnostic efficiency;and finally, the CBAM attention mechanism is introduced to improve the stability and accuracy of the network. Using the proposed method for several experiments, the average accuracy rate reaches 99.6%, and the proposed method can meet the high efficiency and accuracy of roller bearing fault diagnosis. © 2024 IEEE.

关键词： Belt conveyors

来源：评论

学校读者我要写书评

暂无评论

Recent developments in MQL machining of aeronautical materials:A comparative review

引用

Chinese Journal of Aeronautics 2025年第1期38卷 43-69页

作者： Syed Hammad ALI Yu YAO Bangfu WU Biao ZHAO Wenfeng DING Muhammad JAMIL Ahmar KHAN Asra BAIG Qi LIU Dongdong XU National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Mechanical Engineering NED University of Engineering and TechnologyKarachi 75270Pakistan Centre for Precision Manufacturing University of StrathclydeGlasgow G11XQUK School of Mechanical Engineering Tongji UniversityShanghai 200092China

Minimum quantity lubrication(MQL),as a new sustainable and eco-friendly alternative cooling/lubrication technology that addresses the limitations of dry and wet machining,utilizes a small amount of lubricant or coolant to reduce friction,tool wear,and heat during cutting *** technique has witnessed significant developments in recent years,such as combining MQL with other sustainable techniques to achieve optimum results,using biodegradable lubricants,and innovations in nozzle designs and delivery *** review presents an in-depth analysis of machining characteristics(e.g.,cutting forces,temperature,tool wear,chip morphology and surface integrity,etc.)and sustainability characteristics(e.g.,energy consumption,carbon emissions,processing time,machining cost,etc.)of conventional MQL and hybrid MQL techniques like cryogenic MQL,Ranque-Hilsch vortex tube MQL,nanofluids MQL,hybrid nanofluid MQL and ultrasonic vibration assisted MQL in machining of aeronautical ***,the latest research and developments are analyzed and summarized in the field of MQL,and provide a detailed comparison between each technique,considering advantages,challenges,and limitations in practical *** addition,this review serves as a valuable source for researchers and engineers to optimize machining processes while minimizing environmental impact and operational ***,the potential future aspects of MQL for research and industrial execution are discussed.

关键词： Aerospace materials Minimum Quantity Lubrication(MQL) Cryogenic Nanofluid Grinding Milling Sustainability

来源：评论

学校读者我要写书评

暂无评论

Multi-objective optimisation design of cross-shaft based on Kriging response surface optimisation model

引用

International Journal of Wireless and Mobile Computing 2024年第2期26卷 207-214页

作者： Xie, Yuanmin Xiong, Sijie Yun, Juntong Mao, Yanfeng Li, Boao Tang, Xinjie Cao, Yongcheng Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Hubei Wuhan China Precision Manufacturing Research Institute Wuhan University of Science and Technology Hubei Wuhan China Research Centre for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of Science and Technology Hubei Wuhan China Technology Research and Development Hubei Jingmen Wusan Machinery Equipment Manufacturing Co. Ltd. Hubei Jingmen China

Cross-universal coupling is a key component of the mechanical transmission system and the cross-shaft is the core component of the coupling for torque transmission. Under normal circumstances, cross-shafts are most susceptible to fatigue and deformation, mainly due to the large torques they carry and the irrationality of their structure. Traditional design methods rely on practical experience to determine the key dimensions of the cross-shaft, resulting in long design cycles and low reliability. To address this problem, parametric modelling of the cross-shaft is carried out in this paper and imported into ANSYS Workbench. In addition, static and finite element analyses are carried out to find the weak parts of the cross shaft as the objective function. Finally, sensitivity analysis is carried out using the main structural parameters of the cross-shaft as design variables. Based on the linear correlation matrix and sensitivity graph, the three design variables that have the greatest impact on the objective function, journal height, thickness and body length, are selected. © 2024 Inderscience Enterprises Ltd.

关键词： Sensitivity analysis

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：