This paper aims to make a comprehensive evaluation of the progress and achievements made by China and Japan in literature collection, publication and academic research of South…
Abstract
Purpose
This paper aims to make a comprehensive evaluation of the progress and achievements made by China and Japan in literature collection, publication and academic research of South Manchuria Railways Co (SMR) after the Second World War and points out the existing and urgent problems.
Design/methodology/approach
This paper adopts the methods of literature research, questionnaire survey, comparative analysis and expert consultation.
Findings
After the Second World War, both China and Japan made great achievements in the collection, publication and research of SMR data, as well as in the academic research of SMR. However, as a new research field, there are still some problems in deepening the excavation and utilization of SMR data, expanding the research fields, improving the research methods, etc.
Originality/value
SMR itself was the product of a war of aggression. Although it died with the defeat of the war of aggression, remaining SMR data also has very precious value, it records the history of Japanese aggression against China, is the biggest database for the study of the problems in China and northeast Aisa at that time. In addition to Japan and China, the USA and the Soviet Union also kept part of the SMR data, so that to involve them in the research of SMR is also the purpose of this paper.
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This paper aims to expound the composition and characteristics of “SMR Data”, to elaborate the role of the “SMR Data” in the comprehensive study of Anti-Japanese War from three…
Abstract
Purpose
This paper aims to expound the composition and characteristics of “SMR Data”, to elaborate the role of the “SMR Data” in the comprehensive study of Anti-Japanese War from three aspects.
Design/methodology/approach
There are several methodologies included in this thesis, such as literature inquiry, questionnaire survey, field investigation and expert consultation.
Findings
The SMR Data is a historical portrayal of the 40 years of SMR. Its content is integrative, comprehensive and systematic. It covers a large area and a wide range of topics and can reflect the whole process of Japanese militarism’s invasion of China from different aspects.
Originality/value
The study of historical subject is not for the historical fact itself, exploring yesterday is looking for lessons for today. Because the imperialism phenomenon still exists and has not completely withdrew from the historical stage, people step into the typical imperialist colonial aggression, mighty and quite rich mysterious “SMR kingdom” historic sites, to explore the profound truth, unravel mysteries and find out the warning. Taking history as a mirror, all peace-loving people in the world call for a new international order and realize the harmonious coexistence of mankind.
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Yuanqiong He, Hongyi Sun, Wenbin Ni and Stephen C.H. Ng
The importance of supplier integration (SI) in improving firms’ performance has been previously identified but the effects of SI are complicated, as the relationship between…
Abstract
Purpose
The importance of supplier integration (SI) in improving firms’ performance has been previously identified but the effects of SI are complicated, as the relationship between supplier and buyer is full of uncertainty. The purpose of this paper is to re-examine the effects of SI on operations performance from a relational view.
Design/methodology/approach
Two strategies of integrating suppliers are theoretically presented: information sharing and joint decision making. Hypotheses are then developed on when SI influences operations performance, using product complexity and competitive intensity as moderating factors. The hypotheses are tested using a global survey data set, made up of 763 manufacturing firms from 22 countries.
Findings
The results indicate a positive relationship between SI and operations performance and that the moderating roles of product complexity and competition intensity are significant, but product complexity does not have significant moderation effects on the relationships between joint decision making and product quality/cost reduction.
Research limitations/implications
The moderators of product complexity and competitive intensity are not comprehensive. Future study into how and under what circumstances SI has the greatest effect will be of benefit.
Originality/value
This study makes theoretical contributions by exploring the strategies of SI through a relational view, and examining the effects of SI through the moderating roles of product complexity and competition intensity.
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Jun Hu, Wenbin Long, Xianzhong Song and Taijie Tang
Due to environmental externalities, micro-enterprises with profit-seeking features do not develop sufficient motivation for environmental governance. In a fiscally decentralized…
Abstract
Purpose
Due to environmental externalities, micro-enterprises with profit-seeking features do not develop sufficient motivation for environmental governance. In a fiscally decentralized system, local environmental protection authorities perform environmental supervision, and the intensity of the regulations that they implement has an important influence on corporate environmental governance. Based on the promotion tournament framework, this paper aims to discuss the driving mechanism of corporate environmental governance using turnover of environmental protection department directors (EPDDs) as an indicator.
Design/methodology/approach
Using samples of A-share companies listed on the Shanghai and Shenzhen exchanges from 2007 to 2014, this paper examines the impact of EPDD turnover on corporate environmental governance and its underlying mechanism.
Findings
The results show that corporate environmental governance exhibits a political periodicity that changes with the turnover of the EPDD, and the periodicity remains after controlling for the influence of changes in provincial party secretary and governor. Internal mechanisms analysis indicates that, without financial independence, local environmental protection departments rely on increasing sewage charges, not environmental protection subsidies, to promote corporate environmental governance. Further, considering heterogeneity among officials, it finds that the younger a new EPDD is, the more pronounced the periodicity of corporate environmental governance. However, there is no significant difference between in-system and out-system turnover.
Originality/value
In general, this paper describes the mechanisms of corporate environmental governance from the perspective of political economics, and the results have implications for the potential improvement of the government’s environmental supervision functions and the development of ecological civilization in China.
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Jiahao Wang, Guodong Xia, Ran Li, Dandan Ma, Wenbin Zhou and Jun Wang
This study aims to satisfy the thermal management of gallium nitride (GaN) high-electron mobility transistor (HEMT) devices, microchannel-cooling is designed and optimized in this…
Abstract
Purpose
This study aims to satisfy the thermal management of gallium nitride (GaN) high-electron mobility transistor (HEMT) devices, microchannel-cooling is designed and optimized in this work.
Design/methodology/approach
A numerical simulation is performed to analyze the thermal and flow characteristics of microchannels in combination with computational fluid dynamics (CFD) and multi-objective evolutionary algorithm (MOEA) is used to optimize the microchannels parameters. The design variables include width and number of microchannels, and the optimization objectives are to minimize total thermal resistance and pressure drop under constant volumetric flow rate.
Findings
In optimization process, a decrease in pressure drop contributes to increase of thermal resistance leading to high junction temperature and vice versa. And the Pareto-optimal front, which is a trade-off curve between optimization objectives, is obtained by MOEA method. Finally, K-means clustering algorithm is carried out on Pareto-optimal front, and three representative points are proposed to verify the accuracy of the model.
Originality/value
Each design variable on the effect of two objectives and distribution of temperature is researched. The relationship between minimum thermal resistance and pressure drop is provided which can give some fundamental direction for microchannels design in GaN HEMT devices cooling.
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Jiayuan Han, Lingcheng Kong, Wenbin Wang and Jiqing Xie
A public emission reduction project offers saleable carbon credits to encourage individual residents to participate in activities with low carbon emissions: if the residents…
Abstract
Purpose
A public emission reduction project offers saleable carbon credits to encourage individual residents to participate in activities with low carbon emissions: if the residents participate, they will earn carbon credits that can be sold to polluting firms for carbon offsetting. This study explores the economic and environmental implications of these projects.
Design/methodology/approach
The authors develop a multiperiod model to incorporate the decisions of individual residents and a polluting firm. The model captures residents' difference in estimating the price of carbon credits: A proportion of residents are naive residents who shortsightedly take the previous market price of carbon credits as the basis of their decision-making.
Findings
A public emission reduction project can improve the cost-efficiency of carbon reduction, increase both the profit of the polluting firm and consumer surplus, but may hurt the welfare of the participating residents. Reducing transaction costs of carbon credits may cause a greater loss to participating residents. As the ratio of naive residents decreases, the overall welfare of participating residents increases and the number of participating residents decreases.
Practical implications
To encourage more residents to reduce carbon emissions, the project should be promoted to new areas (e.g. rural areas) where there are more naive residents. Although reducing transaction costs is an effective way to increase the economic viability of the project, the government should pay attention to protecting the welfare of residents, and educating residents is an effective way to improve their overall welfare.
Originality/value
This paper is the first to reveal the economic and environmental implications of public emission reduction projects.
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Weizheng Zhang, Wenbin Huang, Hua Lin and Jingwei Liu
This study aims to research the erosion wear characteristics and sealing performance of V-regulating ball valve in coal chemical process pipelines, which provides a theoretical…
Abstract
Purpose
This study aims to research the erosion wear characteristics and sealing performance of V-regulating ball valve in coal chemical process pipelines, which provides a theoretical reference for improving its antiwear and sealing performance.
Design/methodology/approach
Taking the V-regulating ball valve as the research object, based on the computational fluid dynamics and the theory of erosion wear, the authors studied its erosion characteristics under different medium parameters and analyzed the sealing performance under the heat-fluid–solid coupling working condition.
Findings
The erosion wear mechanism of the valve sealing surface is the simultaneous action of cutting and deformation. When the medium flow velocity, particle mass flow rate and particle size increase, the maximum erosion rate and average erosion rate in the V-regulating valve increase. The inner diameter Mises contact stress of the sealing surface is symmetrically distributed in a “wing shape,” and the contact stress of the outer diameter is distributed in a “butterfly shape.” Due to the superposition of thermal stress and pressure stress in the contact transition zone to produce a significant stress concentration.
Practical implications
The findings will provide a theoretical basis for improving the erosion resistance and sealing performance of V-regulating ball valve in coal chemical industry.
Social implications
V-type regulating ball valve is widely favored by coal chemical enterprises and petrochemical enterprises because of its wide adjustment ratio and good erosion resistance.
Originality/value
The V-regulating ball valve wear mechanism for cutting and deformation simultaneously, and its wear rate is positively correlated with the medium flow rate, particle mass flow rate and particle size. After the valve is opened, there is a significant stress concentration occurs in the contact transition zone due to the superposition of thermal stress and compressive stress. The findings will provide a theoretical basis for improving the erosion resistance and sealing performance of V-regulating ball valve in coal chemical industry.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-06-2024-0205/
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Yaqi Diao, Jihui Wang, Renhong Song, Xue Fei, Zhichang Xue and Wenbin Hu
The purpose of this paper is to prepare a multifunctional nanocomposite that is slow-release and resistant to seawater corrosion and biofouling corrosion and to explore the…
Abstract
Purpose
The purpose of this paper is to prepare a multifunctional nanocomposite that is slow-release and resistant to seawater corrosion and biofouling corrosion and to explore the synergistic effect between the two corrosion inhibitors.
Design/methodology/approach
The morphology, structure and release properties of CAP@HNTs, BTA@HNTs and CAP/BTA@HNTs were investigated by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, specific surface area analysis and UV spectrophotometry. The corrosion resistance and antimicrobial properties were investigated by electrochemical measurements and bioinhibition rate tests, and the synergistic effect between the two corrosion inhibitors was explored by X-ray photoelectron spectroscopy.
Findings
The CAP/BTA@HNTs are responsive to acidic environments and have significantly improved antibacterial and corrosion resistance compared with CAP@HNTs and BTA@HNTs. CAP and BTA have a positive synergistic effect on anticorrosion and antifouling.
Originality/value
Two types of inhibitors, anticorrosion and antifouling, were loaded into the same nanocontainer to prepare a slow-releasable and multifunctional nanocomposite with higher resistance to seawater corrosion and biocorrosion and to explore the synergistic effect of CAP and BTA on corrosion resistance.
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Shijie Dai, Shining Li, Wenbin Ji, Zhenlin Sun and Yufeng Zhao
This study aims to realize the constant force grinding of automobile wheel hub.
Abstract
Purpose
This study aims to realize the constant force grinding of automobile wheel hub.
Design/methodology/approach
A force control strategy of backstepping + proportion integration differentiation (PID) is proposed. The grinding end effector is installed on the flange of the robot. The robot controls the position and posture of the grinding end actuator and the grinding end actuator controls the grinding force output. First, the modeling and analysis of the grinding end effector are carried out, and then the backstepping + PID method is adopted to control the grinding end effector to track the expected grinding force. Finally, the feasibility of the proposed method is verified by simulation and experiment.
Findings
The simulation and experimental results show that the backstepping + PID strategy can track the expected force quickly, and improve the dynamic response performance of the system and the quality of grinding and polishing of automobile wheel hub.
Research limitations/implications
The mathematical model is based on the pneumatic system and ideal gas, and ignores the influence of friction in the working process of the cylinder, so the mathematical model proposed in this study has certain limitations. A new control strategy is proposed, which is not only used to control the grinding force of automobile wheels, but also promotes the development of industrial control.
Social implications
The automatic constant force grinding of automobile wheel hub is realized, and the manpower is liberated.
Originality/value
First, the modeling and analysis of the grinding end effector are carried out, and then the backstepping + PID method is adopted to control the grinding end effector to track the expected grinding force. The nonlinear model of the system is controlled by backstepping method, and in the process, the linear system composed of errors is obtained, and then the linear system is controlled by PID to realize the combination of backstepping and PID control.
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Tie-Lin Chen, Wenbin Tao, Wenjun Zhu and Mozhen Zhou
Near-surface mounted (NSM) fiber-reinforced polymer (FRP) rod is extensively applied in reinforced concrete (RC) structures. The mechanical performances of NSM FRP-strengthened RC…
Abstract
Purpose
Near-surface mounted (NSM) fiber-reinforced polymer (FRP) rod is extensively applied in reinforced concrete (RC) structures. The mechanical performances of NSM FRP-strengthened RC structures depend on the bond behavior between NSM reinforcement and concrete. This behavior is typically studied by performing pull-out tests; however, the failure behavior, which is crucial to the local debonding process, is not yet sufficiently understood.
Design/methodology/approach
In this study, a three-dimensional meso-scale finite element method considering the cohesion and adhesion failures is presented to model the debonding failure process in pull-out tests of NSM FRP rod in concrete. The smeared crack model is used to capture the cohesion failures in the adhesive or concrete. The interfacial constitutive model is applied to simulate the adhesion failures on the FRP-adhesive and concrete-adhesive contact interfaces.
Findings
The present method is first validated by two simple examples and then applied to a practical NSM FRP system. This work studied in detail the debonding process, the bond failure types, the location of peak bond stress, the transmitting deformation in adhesive and the morphology of contact zone. The developed method provides a practical and convenient tool applicable for further investigations on the debonding mechanism for the NSM FRP rod in concrete.
Originality/value
A three-dimensional meso-scale finite element method considering the cohesion and adhesion failures is presented to model the debonding failure in NSM FRP-strengthened RC structures. The smeared crack model and the interfacial constitutive model are introduced to develop a convenient approach to analyze the failures in adhesive, concrete and related interfaces. The developed numerical method is applicable for studying the debonding process, the bond failure types, the location of peak bond stress, the transmitting deformation in adhesive and the morphology of contact zone in detail.