Shitao Liu, Rong Cui, Hongwei Cao and Jinhong Qiu
This paper aims to show a resin-flowing model based on Darcy’s law to display the flowing properties of prepreg during lamination. The conformity between the model and…
Abstract
Purpose
This paper aims to show a resin-flowing model based on Darcy’s law to display the flowing properties of prepreg during lamination. The conformity between the model and experimental results demonstrates that it can provide a guideline on print circuit board (PCB) lamination.
Design/methodology/approach
Based on the theoretical derivations of Darcy’s law, this paper made an analysis on the flow of prepreg in the pressing process, according to which a theoretical model, namely, resin-flowing model was further formulated.
Findings
This paper establishes a resin-flowing model, according to which two experiment-verified conclusions can be drawn: first, the resin-flowing properties of material A and B can be improved when the heating rate is between 1.5 and 2.5 min/°C; second, increased pressure gradient can add the amount of flowing resin, mainly featured by increasing pressure and reducing filled thickness of prepreg.
Originality/value
This model provides guidance on setting lamination parameters for most kinds of prepregs and decreasing starvation risk for PCB production.
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Bao Dai, Ahsan Ali and Hongwei Wang
Grounded on the cognition–affect–conation (C–A–C) framework, this study aims to explore how perceived information overload affects the information avoidance intention of social…
Abstract
Purpose
Grounded on the cognition–affect–conation (C–A–C) framework, this study aims to explore how perceived information overload affects the information avoidance intention of social media users through fatigue, frustration and dissatisfaction.
Design/methodology/approach/methodology/approach
A quantitative research design is adopted. The data collected from 254 respondents in China are analyzed via structural equation modeling (SEM).
Findings
Perceived information overload directly affects fatigue, frustration and dissatisfaction among social media users, thereby affecting their information avoidance intention. In addition, frustration significantly affects social media fatigue and dissatisfaction. Consequently, social media fatigue influences dissatisfaction among users.
Originality/value
The literature review indicates that social media overload and fatigue yield negative behavioral outcomes, including discontinuance. However, rather than completely abstaining or escaping, social media users adopt moderate strategies, including information avoidance, to cope with overload and fatigue owing to their high dependence on social media. Unfortunately, merely few studies are available on the information avoidance behavior of social media users. Focusing on this line of research, the current study develops a model to investigate the antecedents of information avoidance in social media.
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Yan Xia, Yi Wan, Hongwei Wang and Zhanqiang Liu
As the transmission component of a locomotive, the traction gear pair system has a direct effect on the stability and reliability of the whole machine. This paper aims to provide…
Abstract
Purpose
As the transmission component of a locomotive, the traction gear pair system has a direct effect on the stability and reliability of the whole machine. This paper aims to provide a detailed dynamic analysis for the traction system under internal and external excitations by numerical simulation.
Design/methodology/approach
A non-linear dynamic model of locomotive traction gear pair system is proposed, where the comprehensive time-varying meshing stiffness is obtained through the Ishikawa formula method and verified by the energy method, and then the sliding friction excitation is analyzed based on the location of the contact line. Meantime, the adhesion torque is constructed as a function of the adhesion-slip feature between wheelset and rail. Through Runge–Kutta numerical method, the system responses are studied with varying bifurcation parameters consisting of exciting frequency, load fluctuation, gear backlash, error fluctuation and friction coefficient. The dynamic behaviors of the system are analyzed and discussed from bifurcation diagram, time history, spectrum plot, phase portrait, Poincaré map and three-dimensional frequency spectrum.
Findings
The analysis results reveal that as control parameters vary the system experiences complex transition among a diverse range of motion states such as one-periodic, multi-periodic and chaotic motions. Specifically, the significant difference in system bifurcation characteristics can be observed under different adhesion conditions. The suitable gear backlash and error fluctuation can avoid the chaotic motion, and thus, reduce the vibration amplitude of the system. Similarly, the increasing friction coefficient can also suppress the unstable state and improve the stability of the system.
Originality/value
The numerical results may provide a systemic understanding of dynamic characteristics and present some available information to design and optimize the transmission performance of the locomotive traction system.
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Hongwei Zhang, Jihong Zhao, Ling Ren and Ruohui Zhao
The purpose of this paper is to examine the determinants of juvenile attitudes toward the police (JATP) in Chinese social settings. More specifically, this study borrows from the…
Abstract
Purpose
The purpose of this paper is to examine the determinants of juvenile attitudes toward the police (JATP) in Chinese social settings. More specifically, this study borrows from the wisdom of social bond theory and relevant literature developed in the USA to explain juvenile ratings of the police on specific job functions.
Design/methodology/approach
The data were collected from a multi-stage cluster sample of 2,704 high school students in a city with a population of 3.8 million located in the southwest region of China. The analysis includes variables derived from social bond theory as well as traditional models commonly employed in US studies, such as demographic background and contact with the police.
Findings
The findings suggest that both social bonds and traditional models have their respective utility to explain the variation in juvenile evaluations of the police.
Originality/value
This study expands the scope of the investigation on JATP in China, a distinctively different cultural environment from the USA. More specifically, it explores the utility of the respective explanatory power of the social bond model and traditional models in relation to juveniles’ ratings of the police in China.
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Wenfu Wang, Dongsheng Zhang, Hongwei Wang, Qingxiang Zhu and Hakimeh Morabbi Heravi
To attain green economic efficiency, small, micro and medium-sized firms must follow environmental paradigms. This research aims to discover the relationship between green…
Abstract
Purpose
To attain green economic efficiency, small, micro and medium-sized firms must follow environmental paradigms. This research aims to discover the relationship between green intellectual capital, green entrepreneurial orientation, green marketing, green organizational culture and competitive advantage strategies to attain sustainable manufacturing business success.
Design/methodology/approach
Today, many companies have accepted their responsibilities, that their operations should not harm the environment. This paper aims to discover the relationship between green factors and competitive advantage strategies to succeed in sustainable manufacturing. The employees of the large manufacturing firms in China are the sample population of the present investigation. Through simple random sampling, surveys were distributed via email. The present study was a quantitative analysis. The analytical tool utilized here was structural equation modeling and SmartPLS program applications.
Findings
The empirical outcomes find that green intellectual capital positively influences competitive advantages and sustainable success in business. In addition, the impact of green entrepreneurial orientation on competitive advantages and sustainable success is positive and significant. The findings illustrated that green marketing is an essential factor in competitive advantage and sustainable success in business. Another point is that green organizational culture positively affects competitive advantages and sustainable success. Finally, competitive advantages have significantly affected sustainable success in business.
Practical implications
The outcomes help specialists enhance their practices to reflect sustainable business efficiency and competitive advantages.
Originality/value
This is the first study that examined businesses' sustainable success and green factors in a comprehensive model and using a specific sample of manufacturing companies based on green technologies.
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Hongwei Liao, Mingyue Li, Ari Van Assche, Jiaojiao Zheng and Liangping Yang
In the context of China’s efforts to build world-class enterprises through mixed-ownership reform, this study aims to build an agency theory framework to analyze the differential…
Abstract
Purpose
In the context of China’s efforts to build world-class enterprises through mixed-ownership reform, this study aims to build an agency theory framework to analyze the differential relation between ownership structure and firm performance in majority versus minority state-owned enterprises (SOEs). It also evaluates the differential influence that political connectedness has on firm performance in the two types of SOEs.
Design/methodology/approach
Using a panel data set of Chinese state-controlled mixed-ownership enterprises covering the period 2010–2019, this paper uses ordinary least squares, random-effects, fixed-effects and three stage least squares regression analysis to study the differential impact of ownership structure and political connectedness on firm performance in majority versus minority SOEs.
Findings
In minority SOEs, firm performance is positively related to the ownership share of the largest private shareholder and state ownership positively moderates this relation. Furthermore, minority SOEs with a politically connected chairman perform worse than those with a politically connected chairman. In majority SOEs, there is no relation between the ownership share of the largest private shareholder and firm performance. In addition, majority SOEs with a politically connected chairman perform similar to those without a politically connected chairman.
Originality/value
The theoretical framework demonstrates that agency problems are substantially different in minority versus majority SOEs and that this influences how changes in ownership structure and in the type of chairman that is assigned affect firm performance. The empirical analysis confirms these predictions.
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Bright Awuku, Eric Asa, Edmund Baffoe-Twum and Adikie Essegbey
Challenges associated with ensuring the accuracy and reliability of cost estimation of highway construction bid items are of significant interest to state highway transportation…
Abstract
Purpose
Challenges associated with ensuring the accuracy and reliability of cost estimation of highway construction bid items are of significant interest to state highway transportation agencies. Even with the existing research undertaken on the subject, the problem of inaccurate estimation of highway bid items still exists. This paper aims to assess the accuracy of the cost estimation methods employed in the selected studies to provide insights into how well they perform empirically. Additionally, this research seeks to identify, synthesize and assess the impact of the factors affecting highway unit prices because they affect the total cost of highway construction costs.
Design/methodology/approach
This paper systematically searched, selected and reviewed 105 papers from Scopus, Google Scholar, American Society of Civil Engineers (ASCE), Transportation Research Board (TRB) and Science Direct (SD) on conceptual cost estimation of highway bid items. This study used content and nonparametric statistical analyses to determine research trends, identify, categorize the factors influencing highway unit prices and assess the combined performance of conceptual cost prediction models.
Findings
Findings from the trend analysis showed that between 1983 and 2019 North America, Asia, Europe and the Middle East contributed the most to improving highway cost estimation research. Aggregating the quantitative results and weighting the findings using each study's sample size revealed that the average error between the actual and the estimated project costs of Monte-Carlo simulation models (5.49%) performed better compared to the Bayesian model (5.95%), support vector machines (6.03%), case-based reasoning (11.69%), artificial neural networks (12.62%) and regression models (13.96%). This paper identified 41 factors and was grouped into three categories, namely: (1) factors relating to project characteristics; (2) organizational factors and (3) estimate factors based on the common classification used in the selected papers. The mean ranking analysis showed that most of the selected papers used project-specific factors more when estimating highway construction bid items than the other factors.
Originality/value
This paper contributes to the body of knowledge by analyzing and comparing the performance of highway cost estimation models, identifying and categorizing a comprehensive list of cost drivers to stimulate future studies in improving highway construction cost estimates.
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Wang Hongwei and Li Ping
This paper aims to reflect the quality of Chinese economic growth and analyze its influential factors through measuring the change rate of technological progress and its…
Abstract
Purpose
This paper aims to reflect the quality of Chinese economic growth and analyze its influential factors through measuring the change rate of technological progress and its contribution rate to economic growth between 1978 and 2008.
Design/methodology/approach
In this paper, an all factor productivity (AFP) method is taken. AFP is essentially a weighted sum of all input factors' productivity. Besides, general hypotheses for production function, such assumptions are not required as neutral technological progress, constant returns to scale and producer equilibrium in method of AFP. Furthermore, specific forms of production function are not needed and can be calculated directly. This method tries to relax the assumptions to make the estimated rate of technological progress closer to the reality in China.
Findings
Empirical research using the AFP method shows a contribution rate of AFP to economic growth has been significantly improved since reform and opening‐up; however, that AFP fluctuates during different periods. China's economic growth is driven by investment and mainly depends on accumulation of capital input and moderate technological progress. Generally speaking, China's change of technological progress is consistent with its economic growth and technological progress plays an important role in its economic growth. The paper concludes that it is becoming significant for China to speed up its large‐scale technological progress, strengthen indigenous innovation, accelerate human resource development, and to facilitate promotion of system reform in an in‐depth manner.
Originality/value
First, in order to ensure the accuracy measurement, and taking into account the impact of macro‐economic control policies, the rate of change of technological progress and its contribution to economic growth are measured, according to the stages of China's economic cycles. Second, the perpetual inventory method is taken to calculate the annual value of fixed asset investment, and price deflated index is used to convert fixed asset investment into comparable data of the base year, 1978. Since the data of fixed assets price index began to be released from 1992, data from 1978 to 1991 are obtained by mathematical method through extension. Third, the theoretical model of AFP is transformed into an empirical one to estimate the change rate of technological progress and its contribution to economic growth in China.
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Min Tao, Hongwei Li and Huanjun Xu
The purpose of this paper is to get hold of the main influence factors of the investment efficiency of environmental governance and control them to improve its efficiency…
Abstract
Purpose
The purpose of this paper is to get hold of the main influence factors of the investment efficiency of environmental governance and control them to improve its efficiency sensitively and employ full use of the investment of environmental governance.
Design/methodology/approach
The assessment index system of the investment efficiency of environmental governance is built. Its investment efficiency is assessed based on data envelopment analysis (DEA). The influence degree on the efficiency between each assessment index is calculated by the grey incidence degree analysis method to find the key influence factors. The efficiency of the investment in the environmental governance can be improved by managing and controlling the key factors.
Findings
The results prove that it is available by the data of 14 cities in Shandong Province in 2008. The key influence factors of the investment efficiency of the environmental governance are: total investment in the treatment of environmental pollution (F1); industrial soot removal (F3); industrial wastewater meeting discharge standards (F2); and the volume of garbage disposal (F9).
Practical implications
The method exposed in the paper can be used to solve investment efficiency problem of the environmental governance of the other provinces, or other years and even other countries.
Originality/value
The paper succeeds in solving investment efficiency problem of the environmental governance by DEA and grey incidence degree analysis method.
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Ming Li, Hongwei Liu, Juan Du, Zhixun Wen, Zhufeng Yue and Wei Sun
This paper presents a review concerning the analytical and inverse methods of small punch creep test (SPCT) in order to evaluate the mechanical property of component material at…
Abstract
Purpose
This paper presents a review concerning the analytical and inverse methods of small punch creep test (SPCT) in order to evaluate the mechanical property of component material at elevated temperature.
Design/methodology/approach
In this work, the effects of temperature, specimen size and shape on material properties are mainly discussed using the finite element (FE) method. The analytical approaches including membrane stretching, empirical or semi-empirical solutions that are currently used for data interpretation have been presented.
Findings
The state-of-the-art research progress on the inverse method, such as non-linear optimization program and neutral network, is critically reviewed. The capabilities of the inverse technique, the uniqueness of the solution and future development are discussed.
Originality/value
The state-of-the-art research progress on the inverse method such as non-linear optimization program and neutral network is critically reviewed. The capabilities of the inverse technique, the uniqueness of the solution and future development are discussed.