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1 – 10 of 68Jingbo Xu, Xiaohong Xu, Xiaomeng Cui, Fujun Zhang, Qiaowei Li, Weidong Wang and Yuhang Jiang
As the infrastructure of the railway, the rail could sink or deform to different degrees due to the impact of train operation or the geological changing force for years, which…
Abstract
Purpose
As the infrastructure of the railway, the rail could sink or deform to different degrees due to the impact of train operation or the geological changing force for years, which will lead to the possibility that the facilities on both sides of the rail invade the rail clearance and bring hidden dangers to the safe operation of the train. The purpose of this paper is to design the gauge to measure the clearance parameters of rail.
Design/methodology/approach
Aiming at the problem, the gauge for clearance measurement was designed based on a combination measurement method in this paper. It consists of the measurement box and the rail measurement vehicle, which integrates a laser displacement sensor, inclination sensor, gauge sensor and mileage sensor. The measurement box was placed outside the rail vehicle. Through the design of a hardware circuit and software system, the movement measurement of the clearance parameters was realized.
Findings
In this paper, the measurement equations of horizontal distance and vertical height were established, the optimal solutions of the structural parameters in the equations were obtained by Levenberg–Marquardt method, then the parameter calibration problem was also solved.
Originality/value
The gauge has high precision; its measurement uncertainty reaches 1.27 mm. The gauge has manual and automatic working modes, which are convenient to operate and have practical popularization value.
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Junyue Mao, Xiaohong Xu, Jinghe Han and Eunju Ko
This study aims to examine the effect of digital fashion marketing on consumer purchase intentions. Rooted in the stimulus–organism–response framework, it explores how digital…
Abstract
Purpose
This study aims to examine the effect of digital fashion marketing on consumer purchase intentions. Rooted in the stimulus–organism–response framework, it explores how digital marketing strategies in the fashion industry influence consumer attitudes and satisfaction, ultimately affecting their purchasing decisions.
Design/methodology/approach
It is mainly focused on the attitudes, satisfaction, and purchase intentions of young consumers in China and South Korea toward fashion brands stimulated by digital fashion shows and non-fungible tokens. This study modifies the research model through case studies, collects data through questionnaires, and analyzes the data using fsQCA and AMOS.
Findings
The findings of the fsQCA study show that stimuli impact consumers’ attitudes, satisfaction, involvement, and willingness to rewatch. The multigroup analysis shows that social norms and images have a greater influence on individuals in China, whereas Korea has a higher direct effect of individual involvement on consumption behavior.
Originality/value
The study is useful for global fashion brands because it emphasizes the role of digital innovations in shaping consumer–brand relationships and makes strategic recommendations for sustainable growth in the digital fashion landscape.
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Weiguo Xue, Wenquan Ma, Xiaohong Xu, Tao Li, Xuguang Zhou and Peng Wang
Thiadiazole compounds and their derivatives have carrying capacity and good lubricating properties. However, their poor oil-solubility limited their wide usage in lubricating oil…
Abstract
Purpose
Thiadiazole compounds and their derivatives have carrying capacity and good lubricating properties. However, their poor oil-solubility limited their wide usage in lubricating oil. The study aims to develop thiadiazole lubricant additives with better oil-solubility. When the hindered phenol antioxidation functional group and alkyl-chain are introduced to thiadiazole, the resulting product could have better oil-solubility and excellent antioxidation resistance, anti-wear and corrosion resistance in the lubricating oil.
Design/methodology/approach
One kind of thiadiazole lubricant additive, for the first time, has been synthesized from 2,5-dimercapto-1,3,4-thiadiazole. Its tribological performance has also been evaluated by four-ball test. And, its oxidation resistance has been estimated by rotating pressure vessel oxidation test and pressurized differential scanning calorimetry. The anticorrosion performance of such an additive has been studied by GB/T 5096 standard method test.
Findings
The synthesized thiadiazole additive has excellent anti-oxidation capability, good anti-wear and extreme pressure properties and good anticorrosion performance, in comparison with zinc dialkyl dithiophosphate (ZDDP). In base oils, the comprehensive performance of thiadiazole additive is comparable to ZDDP. Mechanistic studies indicate that the S and N active elements were involved in the formation of a boundary film. This may account for the formation of a composite membrane on the metal surface and thus for the tribological performance of such thiadiazole additives.
Originality/value
The thiadiazole derivatives, which are ashless and have environmentally friendly features, are a potential alternative to ZDDP. Because of the film formed on the friction surface, thiadiazole compounds may serve as an excellent anti-wear additive and are expected to reduce friction and wear between metals.
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Xiaohong Xu, Jiusheng Li, Lingguo Sun and Qunji Xue
The fast growing concern for maintaining integrity of the environment has built up development of environmentally‐adapted lubricants. Because of their toxicity, most of the…
Abstract
Purpose
The fast growing concern for maintaining integrity of the environment has built up development of environmentally‐adapted lubricants. Because of their toxicity, most of the traditional lubricating additives cannot be used in this kind of lubricant. The purpose of this paper is to find a borate ester derivative which can be used as a multifunctional additive in rapeseed oils (RSO).
Design/methodology/approach
A borated S‐2‐hydroxypropyl N, N‐dibutyl dithiocarbamate (BDTC) was synthesized and characterized. Its tribological properties in rapeseed oil as multifunctional additive were evaluated, using a four‐ball tribometer and compared with one kind of commercial MoDTC. In addition, its thermal stability was identified using TGA and antioxidative ability tested by PDSC. The action mechanism of BDTC was studied by X‐ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and atmospheric pressure chemical ionization mass spectrometer (APCI/MS) analysis.
Findings
Results show that BDTC exhibits high thermal stability, possesses comprehensive tribological performance in rapeseed oil, and has evident effect in controlling the oxidation of RSO. Analysis of worn surface indicates that BDTC was decomposed and reacted with metal during the friction process. The lubricating film mainly contains inorganic boron compound (B2O3), organic nitrogen derivatives and FeSO4.
Originality/value
This paper provides a borate ester derivative which possesses excellent tribological properties and can be used as a multifunctional ashless additive in environmentally‐adapted lubricants. Furthermore, an innovative method, APCI/MS, was used to analyze the tribo‐fragmentation behavior of BDTC.
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Lifeng Hao, Jiusheng Li, Xiaohong Xu and Tianhui Ren
Nanoparticles are not well dispersed in non‐polar organic solvents due to their hydrophilic property which limits their applications in lubricant oils. To improve the…
Abstract
Purpose
Nanoparticles are not well dispersed in non‐polar organic solvents due to their hydrophilic property which limits their applications in lubricant oils. To improve the oil‐solubility of nanoparticles, a novel technology was used to prepare a kind of lubricant containing calcium borate nanoparticles.
Design/methodology/approach
The microstructures of the prepared nanoparticles were characterized by transmission electron microscope (TEM) and infrared spectra (IR). Tribological properties of calcium borate nanoparticles used as additive in base oil were evaluated using four‐ball tribotester and SRV tribotester, and the worn surface of the steel ball was investigated by Polarized microscope (PM) and X‐ray photoelectron spectroscopy (XPS). In addition, the dispersing stability and antioxidation property of lubricant containing nanoparticles were also studied.
Findings
The results indicate that the average size of the prepared nanoparticles is in the range of 50‐100 nm, and the surface of the nanoparticles was altered from hydrophilicity to hydrophobicity. At the same time, the nanoparticles can be well dispersed in the base oil totally under novel process which has no significantly negative effect on the antioxidation property. The results of tribological tests show that calcium borate nanoparticles under the novel process (CBNN) show better antiwear property and friction‐reducing property in base oil compared to calcium borate nanoparticles under tradition process (CBNT). Based on the results of PM and XPS, it can be deduced that a continuous resistance film containing depositions and the tribochemical reaction products such as B2O3, FeB, Fe2O3 and CaO formed during the sliding process.
Originality/value
The main innovative thought of this work lies in dealing with the oil‐solubility problem through the combination effect of surface modification and special blend process of lubricating oil, and this method was first used to prepare lubricant containing calcium borate nanoparticles. It should be helpful for the borate nanoparticles used as additives in engine oil, gear oil and other industrial lubricants.
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Jiusheng Li, Lifeng Hao, Xiaohong Xu and Tianhui Ren
Sulfurized olefins have been extensively used in many kinds of gear lubricants as EP additives. However, their commercial applications are not totally satisfactory because of the…
Abstract
Purpose
Sulfurized olefins have been extensively used in many kinds of gear lubricants as EP additives. However, their commercial applications are not totally satisfactory because of the pungent, obnoxious odor and corrosion of copper and copper alloys. The purpose of this paper is to investigate the synergistic effects of one type of calcium borate nanoparticles modified by oleic acid (code to CaBN) and sulfurized olefin, in a kind of mineral base oil MVIS 250, in order to find a potential substitute for sulfurized olefins.
Design/methodology/approach
One kind of calcium borate nanoparticle modified by oleic acid (CaBN) was prepared, and its structures were characterized by inductively coupled plasma atomic emission spectroscopy (ICP‐AES), X‐ray power diffraction (XRD) and transmission electron microscope (TEM). The tribological properties of the complex of CaBN with sulfurized olefins (T321) in base oil were evaluated using four‐ball tribotester and compared with CaBN or T321 as individual component. The worn surfaces were investigated by scanning electron microscope (SEM) and X‐ray photoelectron spectroscopy (XPS). In addition, the corrosion‐inhibiting properties of additives were also studied.
Findings
The results of tests show that there are significant synergistic effects on tribological properties between two kinds of additives. Based on the results of SEM and XPS, it can be deduced that a wear resistance film containing B2O3, FeS, FeS2 and CaO was formed on the worn surfaces during the sliding process. Moreover, CaBN and T321 also show excellent synergistic effect on the corrosion‐inhibiting property.
Originality/value
This paper provides a kind of “green” nanoparticle which possesses excellent synergic effect with sulfurized olefins, and gives another selection for industrial applications in which T321 is needed.
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Xiaohong Xu, Stephanie C. Payne, Margaret T. Horner and Allison L. Alexander
The purpose of this paper is to examine how individual differences influence employees’ attitude toward organizational change. Specifically, the present study examined how and why…
Abstract
Purpose
The purpose of this paper is to examine how individual differences influence employees’ attitude toward organizational change. Specifically, the present study examined how and why proactive personality, dispositional resistance to change, and change self-efficacy influence employees’ perceived fairness about the organizational change.
Design/methodology/approach
Structural equation modeling was utilized to analyze the survey data obtained from a sample of 140 food service employees after some organizational changes in leadership, menu offerings, and facilities.
Findings
The results revealed support for two micromediational chains predicting change fairness: first, change self-efficacy leads to less uncertainty and second, dispositional resistance to change leads to less communication regarding change resulting in employees perceiving they have fewer opportunities to voice concerns about the changes.
Research limitations/implications
The cross-sectional design prevents causal inferences and the generalizability of the present findings beyond similar samples experiencing similar changes is unknown. However, the predictions were based on theories that apply to all employees regardless of the changes or the employees’ occupations or workplace.
Social implications
Employees with particular personality traits are more receptive to change, suggesting that organizations should consider the impact of individual differences when facing large-scale change. To ensure the success of organizational change, organizations should communicate with employees and encourage employee input before implementing change which in turn improves the chances that employees will have favorable reactions to the change.
Originality/value
This is the first study to examine how and why individual difference variables influence employees’ perceptions about organizational change fairness.
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CHINA: Efforts to ‘Sinicise’ churches will bear fruit
Liukai Wang, Ji Yan, Xiaohong Chen and Qifa Xu
The purpose of this study is to bridge the gap in the literature on supply chain finance (SCF) by exploring the relationship between network capabilities and corporate financial…
Abstract
Purpose
The purpose of this study is to bridge the gap in the literature on supply chain finance (SCF) by exploring the relationship between network capabilities and corporate financial performance (CFP) in financial supply chains (FSCs).
Design/methodology/approach
The authors collect panel data and adopt regression analysis to analyse the joint investment activities among 1359 manufacturing firms and 289 financial service providers in China to explore how network capabilities, both network power and network centrality, improve CFP in the FSCs.
Findings
Under the FSCs environments, network centrality (i.e. eigenvector centrality, closeness centrality and betweenness centrality) raises CFP (ROA, ROE and Tobin's Q) and network power (node degree, clustering coefficient) also improves CFP. However, node strength from the network power stream has a negative effect on Tobin's Q, indicating that when the partner of a firm has an extremely strong influence in FSCs; this weakens the bargaining ability and flexibility of the focal firm, thus reducing its long-term financial performance.
Practical implications
The joint investment activities among supply chain partners and financial service providers help managers understand the advanced financing solutions generated by internal and external network organisations as well as be aware of network capabilities' impact on CFP in FSCs.
Originality/value
This study answers the call for more empirical research on SCF to provide a broader sample to examine financial supply chain management. This is one of the earliest studies to shed light on a new perspective – how network capabilities improve CFP in the FSCs.
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