Xiaohong Lu, FuRui Wang, Liang Xue, Yixuan Feng and Steven Y. Liang
The purpose of this study is to realize the multi-objective optimization for MRR and surface roughness in micro-milling of Inconel 718.
Abstract
Purpose
The purpose of this study is to realize the multi-objective optimization for MRR and surface roughness in micro-milling of Inconel 718.
Design/methodology/approach
Taguchi method has been applied to conduct experiments, and the cutting parameters are spindle speed, feed per tooth and depth of cut. The first-order models used to predict surface roughness and MRR for micro-milling of Inconel 718 have been developed by regression analysis. Genetic algorithm has been utilized to implement multi-objective optimization between surface roughness and MRR for micro-milling of Inconel 718.
Findings
This paper implemented the multi-objective optimization between surface roughness and MRR for micro-milling of Inconel 718. And some conclusions can be summarized. Depth of cut is the major cutting parameter influencing surface roughness. Feed per tooth is the major cutting parameter influencing MRR. A number of cutting parameters have been obtained along with the set of pareto optimal solu-tions of MRR and surface roughness in micro-milling of Inconel 718.
Originality/value
There are a lot of cutting parameters affecting surface roughness and MRR in micro-milling, such as tool diameter, depth of cut, feed per tooth, spindle speed and workpiece material, etc. However, to the best our knowledge, there are no published literatures about the multi-objective optimization of surface roughness and MRR in micro-milling of Inconel 718.
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Xiaohong Lu, FuRui Wang, Zhenyuan Jia and Steven Y. Liang
Cutting tool wear is known to affect tool life, surface quality, cutting forces and production time. Micro-milling of difficult-to-cut materials like Inconel 718 leads to…
Abstract
Purpose
Cutting tool wear is known to affect tool life, surface quality, cutting forces and production time. Micro-milling of difficult-to-cut materials like Inconel 718 leads to significant flank wear on the cutting tool. To ensure the respect of final part specifications and to study cutting forces and tool catastrophic failure, flank wear (VB) has to be controlled. This paper aims to achieve flank wear prediction during micro-milling process, which fills the void of the commercial finite element software.
Design/methodology/approach
Based on tool geometry structure and DEFORM finite element simulation, flank wear of the micro tool during micro-milling process is obtained. Finally, experiments of micro-milling Inconel 718 validate the accuracy of the proposed method for predicting flank wear of the micro tool during micro-milling Inconel 718.
Findings
A new prediction method for flank wear of the micro tool during micro-milling Inconel 718 based on the assumption that the wear volume can be assumed as a cone-shaped body is proposed. Compared with the existing experiment techniques for predicting tool wear during micro-milling process, the proposed method is simple to operate and is cost-effective. The existing finite element investigations on micro tool wear prediction mainly focus on micro tool axial wear depth, which affects size accuracy of machined workpiece seriously.
Originality/value
The research can provide significant knowledge on the usage of finite element method in predicting tool wear condition during micro-milling process. In addition, the method presented in this paper can provide support for studying the effect of tool flank wear on cutting forces during micro-milling process.
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Xiaohong Lu, FuRui Wang, Zhenyuan Jia, Likun Si and Yongqiang Weng
This paper aims to predict tool wear and reveal the relationship between feed per tooth and tool wear in micro-milling Inconel 718 process.
Abstract
Purpose
This paper aims to predict tool wear and reveal the relationship between feed per tooth and tool wear in micro-milling Inconel 718 process.
Design/methodology/approach
To study and solve the tool wear problem in micro-milling of Inconel 718 micro components, in this paper, the investigation of micro-milling Inconel 718 process was implemented based on DEFORM finite element simulation, and tool wear depth of micro-milling cutter acted as output.
Findings
Different from the traditional macro milling process, diameter reduction percentage and average flank wear length decreased with the increase of feed per tooth; tool wear depth decreased when the feed per tooth was less than the minimum chip thickness.
Originality/value
At present, research on the prediction of tool wear in micro-milling of Inconel 718 has never been publicly reported. This study is significant to reveal the relationship between cutting parameters (feed per tooth) and tool wear in micro-milling Inconel 718.
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The integrated and coordinated development of the manufacturing and logistics industries is crucial for promoting deep integration and innovative development between the two…
Abstract
Purpose
The integrated and coordinated development of the manufacturing and logistics industries is crucial for promoting deep integration and innovative development between the two sectors. It aids in reducing costs and enhancing efficiency, which is significant for high-quality economic growth and the acceleration of modern industrial system construction.
Design/methodology/approach
This paper explores the integrated development status of the two industries in Shandong and Jiangsu provinces. Based on the relevant data of 44 indicators from the manufacturing and logistics industries in these provinces from 2010 to 2021, a comprehensive evaluation index system is constructed. The study employs coupling coordination degree and grey correlation models to comparatively analyze the integrated development status of the two industries in the provinces.
Findings
The findings indicate that the coupling coordination degree of Jiangsu and Shandong provinces has shown a gentle spiraling upward trend. By 2021, Jiangsu province had achieved intermediate coordination, and Shandong province had achieved good coordination. The grey correlation degree is within the moderate and strong correlation range, but the impact of efficiency indicators is weak.
Research limitations/implications
The research has limitations, including a focus on specific provinces, potential data constraints and a need for further exploration of the dynamic and influencing factors of the industries' coordinated development for more comprehensive conclusions.
Practical implications
The research provides practical significance by offering insights into the coordinated development of manufacturing and logistics industries, which can inform policymaking and strategic planning for regional economic integration and supply chain efficiency.
Social implications
The study’s findings offer actionable insights for policymakers, promoting regional economic synergy and supply chain optimization. It emphasizes the crucial role of industry integration in advancing high-quality economic growth, aligning with modern industrial system development goals.
Originality/value
This research’s innovation lies in its comprehensive evaluation index system and the application of coupling coordination degree and grey relational analysis models, offering a nuanced assessment of the integrated development between manufacturing and logistics industries in Jiangsu and Shandong provinces. It provides valuable insights for policymakers aiming to enhance regional economic integration and supply chain efficiency.
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This paper aims to report on the China‐North America Library Conference held in Beijing, China. The conference theme is Sharing Digital Resources: Challenges and Opportunities…
Abstract
Purpose
This paper aims to report on the China‐North America Library Conference held in Beijing, China. The conference theme is Sharing Digital Resources: Challenges and Opportunities. Six sub‐themes are also intertwined with the conference theme: Resource sharing policies and perspectives; Digital infrastructure and repository technology; Research data sharing; Sharing digital preservation methods; and Shared digital access, retrieval and use.
Design/methodology/approach
The paper summarizes several important presentations at the conference.
Findings
The shared projects in this report include: National Cultural Information Resource Sharing Project; Multicultural Canada Project; Data Conservancy; National Library Digital Exchange Services; and Digital Museum Platform.
Originality/value
This is an original conference report which would help those who are interested in sharing digital resources on a global scale to understand the challenges, issues, and opportunities on that aspect.
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China's rise as a major player in world affairs has contributed significantly to the global interest in the study of Chinese language, society, and culture. Its emerging…
Abstract
Purpose
China's rise as a major player in world affairs has contributed significantly to the global interest in the study of Chinese language, society, and culture. Its emerging importance has also increased the need for China‐related library materials and information provision to China scholars and the general public in recent years. This paper seeks to trace the historical transformation and renewed interest in China studies and the growing demand placed on Asian or East Asian libraries that support China studies in the USA.
Design/methodology/approach
The paper is a general review of the issues and challenges facing libraries in the West, which serve Chinese scholars, with the increasing demand for China‐related library materials and information resources, as well as for delivery of such information resources.
Findings
The paper identifies the issues and challenges facing libraries in the West that serve China scholars. The importance of collection building in China studies, the role of Chinese studies librarians, professional support for East Asian studies librarians in North America, and the changing outlook of academic libraries is highlighted.
Practical implications
In a world that is increasingly more global, Asian or East Asian libraries must gain better understanding if the issues and best practices to effectively provide information service through collaboration and resource sharing with partners in Asia to achieve true global collections.
Originality/value
The paper presents possible measures that can be undertaken to bridge the difference between the East and West. Specifically, the paper addresses concerns libraries outside China encounter and proposes suggestions regarding resource sharing, balancing a Chinese collection in a networked environment, financial challenges, continuing education, and bibliographic control.
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The purpose of this paper is to explore the role of commercial long-term care insurance (LTCI) in long-term care (LTC) services, and to elucidate the mediating roles of service…
Abstract
Purpose
The purpose of this paper is to explore the role of commercial long-term care insurance (LTCI) in long-term care (LTC) services, and to elucidate the mediating roles of service quality and relationship satisfaction in the relationship between customization and loyalty. In addition, this study offers important recommendations for policy makers in formulating policy aimed at supporting the industry and regulating its customer relationships in life insurers in Taiwan.
Design/methodology/approach
Study participants were policyholders of life insurance in Taiwan with experience in purchasing commercial LTCI. They were investigated through in-depth interviews and surveys. The hypotheses were tested using the structural equation modeling (SEM) analysis of variance.
Findings
The findings of this study are important for policy makers in formulating policy aimed at supporting the industry and regulating its customer relationships.
Originality/value
This study represents the first attempt to investigate the role of LTCI in LTC services in Taiwan. Likewise, this study improves our understanding of the main issues relating to the effect of customization on policyholder loyalty, and the partially mediating role of service quality and relationship satisfaction in the insurance marketing context.
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Juan Du, Mengyao Yu, Pingli Liu, Yongqiang Fu, Gang Xiong, Jinming Liu and Xiang Chen
This paper aims to analyze the high temperature (200°C) corrosion behavior of 2205 duplex stainless steel in acidizing stimulation solution containing hydrochloric acid (HCl) and…
Abstract
Purpose
This paper aims to analyze the high temperature (200°C) corrosion behavior of 2205 duplex stainless steel in acidizing stimulation solution containing hydrochloric acid (HCl) and acetic acid.
Design/methodology/approach
The corrosion rate of 2205 duplex stainless steel in all kinds of acid solutions was calculated through immersion tests and electrochemical test. The corrosion product composition is analyzed by X-ray diffraction analysis. The element composition and element distribution before and after corrosion were analyzed by an X-ray energy spectrometer. The corrosion morphology of the steel surface was observed by a scanning electron microscope. Both static and dynamic corrosion experiments were carried out at 200°C.
Findings
The results show that 2205 duplex stainless steel has excellent corrosion resistance in low to high concentration acetic acid solutions, but increasing the concentration of Cl− in acetic acid solution will accelerate the corrosion rate. Low concentration HCl solution can cause serious corrosion to 2205 duplex stainless steel. The system of HCl and acetic acid will produce a synergistic effect on corrosion of 2205 duplex stainless steel and accelerate the corrosion. Sb2O3 is a good corrosion inhibitor synergist for high-temperature acidizing stimulation solution.
Originality/value
The amount of HCl that is used in acidizing stimulation is usually determined by the dissolution effect of the acid on the rocks, but for ultra-high-temperature reservoirs, the amount of HCl should be based on reducing the corrosion of oil and gas wells.
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To provide guidelines for the development of textile electrode compression pants that collect reliable signals during surface electromyography (sEMG) measurements and maintain a…
Abstract
Purpose
To provide guidelines for the development of textile electrode compression pants that collect reliable signals during surface electromyography (sEMG) measurements and maintain a comfortable level of pressure.
Design/methodology/approach
To increase skin adhesion, 12 textile electrode bands for biceps brachii were prepared according to a combination of variables, namely, the type of the textile electrode, the pressure level and the presence or absence of an electrolyte. The dry textile electrode adopted herein was developed in terms of the size and material of the contact area, and a new electrode design was proposed. After examining the optimal design conditions by measuring the sEMGs during isometric exercise of the biceps brachii, prototype pants were designed based on the design variables that gave the most promising evaluation results. The completed prototype pants were verified through isometric thigh muscle exercises.
Findings
It was confirmed that the textile electrode was capable of EMG measurement with an excellent signal quality. Upon considering the comfort of wearing the device and the cost efficiency of dry electrodes, prototype pants that adopted a fit relative to a light clothing pressure (i.e. thigh: 1.3–1.9 kPa), and combined both silicon and silver thread embroidery with a wide contact area for stability, were designed and their sEMG measurements were confirmed.
Originality/value
In this study, wearable clothing based on textile electrodes was developed to ensure a comfortable fit from the wearer's perspective, and a design method was proposed for the development of low-cost SmartWear electrodes and circuits.
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Tai-Chia Huang, Chia-Hsuan Hsieh and Hei-Chia Wang
Producing meeting documents requires an instantaneous recorder during meetings, which costs extra human resources and takes time to amend the file. However, a high-quality meeting…
Abstract
Purpose
Producing meeting documents requires an instantaneous recorder during meetings, which costs extra human resources and takes time to amend the file. However, a high-quality meeting document can enable users to recall the meeting content efficiently. The paper aims to discuss these issues.
Design/methodology/approach
An application based on this framework is developed to help the users find topics and obtain summarizations of meeting contents without extra effort. This app uses the Bluemix speech recognizer to obtain speech transcripts. It then combines latent Dirichlet allocation and a TextTiling algorithm with the speech script of meetings to detect boundaries between different topics and evaluate the topics in each segment. TextTeaser, an open API based on a feature-based approach, is then used to summarize the speech transcripts.
Findings
The results indicate that the summaries generated by the machine are 85 percent similar to the records written by humankind.
Originality/value
To reduce the human effort in generating meeting reports, this paper presents a framework to record and analyze meeting contents automatically by voice recognition, topic detection, and extractive summarization.