Liping Zhang, Jun Xia, Xingyuan Song and Xiaofeng Cheng
With frequent floods occurring, and the fast economic development in China, attention must be paid to flood prevention, water supply, and forecasting precision. In particular…
Abstract
Purpose
With frequent floods occurring, and the fast economic development in China, attention must be paid to flood prevention, water supply, and forecasting precision. In particular, mid‐ and long‐term runoff prediction is being paid more and more attention by researchers, and it is also the most difficult problem to solve. The purpose of this paper is to apply chaos phase space theory to forecast river run off.
Design/methodology/approach
Because the hydrologic system is a complicated huge system, there exist high non‐linear characteristics in the space‐time change of hydrologic factors. According to theory of chaotic phase space, the paper established four models of the single‐point, multi‐point, lineal, and three‐parameter D(m,τ,k) models, they have stronger non‐linear mapping function and much more information in the time series than traditional ways.
Findings
The results of calculation show that the models are highly effective and worthy of popularization and application. It is reasonable and superior to use these models in mid‐ and long‐term hydrologic prediction.
Research limitations/implications
The method cannot reduce or eliminate the un‐prediction parts caused by the inner random factors, such as the noise information of the observed data.
Practical implications
The models are applied in the long‐term runoff prediction of Baishan reservoir.
Originality/value
The new approach of hydrology forecasting due to the theory of chaotic phase space. The paper is aimed at hydrology forecasting researches and engineers, especially those who dealt with the mid‐ and long‐term prediction.
Details
Keywords
Sifeng Liu, Yong Tao, Naiming Xie, Liangyan Tao and Mingli Hu
The purpose of this paper is to summarize the advances in grey system theory research and various application achievements in science and engineering. At the same time, it…
Abstract
Purpose
The purpose of this paper is to summarize the advances in grey system theory research and various application achievements in science and engineering. At the same time, it commemorates the 40th anniversary of the birth of grey system theory and the 10th anniversary of Grey Systems–Theory and Application.
Design/methodology/approach
Firstly, the innovations of theoretical research in grey system theory were summarized and some of the widely recognized new results are briefly described. By searching and combing the research results of grey system theory in China national knowledge infrastructure (CNKI) database and Web of Science by Institute for Scientific Information (ISI), this paper shows the rapid development trend of grey system theory in the past 40 years, and the successful applications of grey system theory in the fields of social sciences, natural sciences and engineering technologies.
Findings
More than 227 thousands literature were found by input 10 phrases such as grey system, grey number and sequence operator etc. in CNKI database. After entering the new century, the number of grey system papers included in CNKI database is increasing rapidly. Since 2008, more than 10 thousands papers have been included per year and more than 15 thousands papers have been included per year since 2014. Grey system method and model are widely used in physics, chemistry, biology and other fields of natural science, as well as transportation, electric power, machinery and other fields of engineering technology, and a large number of valuable results have been achieved.
Practical implications
It can be seen that the grey system theory plays an important role in promoting China’s scientific and technological progress, innovation and development and high-level talent training from tens of thousands of literatures marked with important national science and technology projects and a large number of grey system literatures published by China’s double first-class universities and double first-class discipline construction universities.
Originality/value
Both innovations of theoretical research and practical application play important role in the growth of new theory. The innovations of theoretical research provide methods and tools for practical application, which is conducive to improve application efficiency and broaden application fields. A large number of practical applications needs have become the source of theoretical innovation and the solid background for the birth of theoretical innovation achievements.
Details
Keywords
Recai Coşkun and Oğuzhan Öztürk
This study aims to critically evaluate resource dependence theory’s (RDT) assumptions and explanations about dependence and the dependent firm’s strategic options. The authors…
Abstract
Purpose
This study aims to critically evaluate resource dependence theory’s (RDT) assumptions and explanations about dependence and the dependent firm’s strategic options. The authors argue that RDT’s perception of dependence is problematic because it evaluates dependence as a purely negative situation in which all firms, by definition, seek to develop strategies to change the power structure of such relationships. On the contrary, the authors argue that there are situations in which dependent firms are in agreement with dependence and, therefore, develop strategies that do not aim to change the balance of power in the relationship, but rather to strengthen their position within the relationship.
Design/methodology/approach
The research is designed as a theoretical discussion. The authors critically evaluate and discuss current understanding and assumptions about RDT’s dependence explanations. Drawing on insights from the strategic management literature, the authors offer a new perspective on the problematic areas in the dependence explanations of the RDT.
Findings
Drawing on insights from the strategic management literature, the authors argue that dependent firms enjoy certain advantages due to the dependence relationship to gain sustainable competitive advantages over their rivals and potential competitors. These advantages include factors such as increasing growth potential, developing capabilities and competencies, building relationships of trust with powerful firms and leveraging their reputations and references that contribute to the sustainable strategic advantages of dependent firms. The authors believe that this study has the potential to spur new research that further challenges the assumptions of the RDT and empirically tests its propositions.
Originality/value
The authors propose a research framework on dependence as a strategic option that has the possibility of expanding RDT’s current dependence explanation.
Details
Keywords
Baoping Ren and Wei Jie
Constant or decreasing returns and increasing returns to scale are two kinds of mechanism in economic growth. The goal of supply-side structural reform is to promote the…
Abstract
Purpose
Constant or decreasing returns and increasing returns to scale are two kinds of mechanism in economic growth. The goal of supply-side structural reform is to promote the establishment of the mechanism with increasing returns to scale. The paper aims to discuss this issue.
Design/methodology/approach
This paper argues that the overall economic structure of the developing economy has been divided into the sector of constant or decreasing returns to scale and the sector of increasing returns to scale due to the dual economic structure. Among them, the supply-side structural reform is mainly to reduce the sector of decreasing returns to scale and increase the sector of increasing returns to scale. Based on the hypothesis of such two-sector economic structure in the supply side of developing economies and on the industrial data, this paper empirically tests the returns to scale of China’s supply structure. The result suggests that so far the sector of constant or decreasing returns to scale dominates the supply structure of China’s economic growth, which results in the state of decreasing returns to scale in China’s overall economy.
Findings
Therefore, to realize the long-term sustained growth and transformation of the development pattern of China’s economy, the authors must carry out the supply-side structural reform, vigorously develop the modern industrial sectors characterized by modern knowledge and technology, and promote the development of an innovation-driven economy.
Originality/value
Besides, the authors must accelerate the transformation from traditional industrial sectors to modern industrial sectors, actively promote China’s industrial structure toward rationalization and high gradation, as well as build a modern industrial system so as to facilitate the formation of the mechanism of increasing returns to scale and accelerate the transformation of the driving force of China’s economic growth.
Details
Keywords
New (post‐1949) Chinese local gazetteers are one of the major primary resources for contemporary China Studies in the field of history, social sciences, humanities and sciences…
Abstract
Purpose
New (post‐1949) Chinese local gazetteers are one of the major primary resources for contemporary China Studies in the field of history, social sciences, humanities and sciences. Major research libraries in North America have collected them; however, the research value of this series of publications has not yet fully explored. This paper aims at examining how new local gazetteers have been compiled, the scope of their content and research value, and how scholars have used them.
Design/methodology/approach
The paper explores the scope and importance of the new Chinese local gazetteers collection through reviewing relevant regulations, policies and guidelines regarding compilation of the new local gazetteers, and randomly examining over 30 provincial, city and county gazetteers.
Findings
The paper provides a detailed account of publishing history of this collection; rich and unique research information available; and approaches to collection development, including utilizing digitized gazetteers by Chinese governments.
Originality/value
The paper explores the development of new Chinese local gazetteers in a more systematic way and adds to the current literature on the unique research value this collection has to offer.
Details
Keywords
Harit Satt and George Iatridis
This paper investigates the impact of annual reports complexity (associated with tone complexity) on dividend policy and value of dividend policy.
Abstract
Purpose
This paper investigates the impact of annual reports complexity (associated with tone complexity) on dividend policy and value of dividend policy.
Design/methodology/approach
This paper uses the variable complexity provided by the textual analytics software (Diction 7.0) as the proxy for annual reports' tone complexity. The data covered non-financial American firms from years 2011–2019. The pooled ordinary least squares (OLS) regression and the instrumental variable regression are used to test the study’s arguments.
Findings
The findings suggest that the signaling theory of dividends holds in the United States. Firms with more complex annual reports tend to distribute more dividends, mainly in environment of high information. When information asymmetry is high, managers would use dividends as a tool to mitigate information asymmetry. Furthermore, the findings suggest that dividend policy has a stronger impact on firm value, especially when the tones of annual reports are highly complex. These findings support the previous results, namely, that managers would opt for dividend policy as a signaling tool for its positive impact on firm value. The results are robust to potential endogeneity issues and alternative proxies for both dividend policy and information asymmetry.
Practical implications
The results demonstrate that the dividends' signaling theory holds in the United States, where the findings cannot be generalized to all markets; However, the findings of this research can be of use to potential and current investors, users of annual reports and decision makers as well.
Originality/value
The paper highlights the effect of the tone complexity of annual reports (using 10K text analytics) on the value of dividend policy and dividend policy itself in a developed economy. Understanding this relation will enable stakeholders to forecast future dividends, choose more appropriate valuation methods and hence restore investors' faith.
Details
Keywords
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.
Details
Keywords
Jianping Dou, Jun Li and Xia Zhao
The purpose of this paper is to develop a feasible sequence-oriented new discrete particle swarm optimization (NDPSO) algorithm with novel particles’ updating mechanism for…
Abstract
Purpose
The purpose of this paper is to develop a feasible sequence-oriented new discrete particle swarm optimization (NDPSO) algorithm with novel particles’ updating mechanism for solving simple assembly line balancing problems (SALBPs).
Design/methodology/approach
In the NDPSO, a task-oriented representation is adopted to solve type I and type II SALBPs, and a particle directly represents a feasible task sequence (FTS) as a permutation. Then, the particle (permutation) is updated as a whole using the geometric crossover based on the edit distance with swaps for two permutations. Furthermore, the fragment mutation with adaptive mutation probability is incorporated into the NDPSO to improve exploration ability.
Findings
Case study illustrates the effectiveness of the NDPSO. Comparative results between the NDPSO and existing real-encoded PSO (CPSO) and direct discrete PSO (DDPSO) against benchmark instances of type I SALBP and type II SALBP show promising higher performance of the proposed NDPSO.
Originality/value
A novel particles’ updating mechanism for FTS-encoded particle is proposed to solve the SALBPs. The comparative results indicate that updating of FTS as a whole seems superior to existing updating of FTS by fragment with respect to exploration ability for solving SALBPs. The novel particles’ updating mechanism is also applicable to generalized assembly line balancing problems.
Details
Keywords
Akanksha Jain, Smita Kashiramka and Sonali Jain
The purpose of this study is to present the overall trend and dynamics in global mergers and acquisitions activity while suggesting future research avenues in this domain. The…
Abstract
Purpose
The purpose of this study is to present the overall trend and dynamics in global mergers and acquisitions activity while suggesting future research avenues in this domain. The analysis covers two aspects to examine the main contours of the domain, that is performance analysis followed by thematic cluster analysis.
Design/methodology/approach
Bibliometric analysis has been used for examining 1,433 publications extracted from the Scopus database to identify the research trend between 2000 and 2021. With the help of VosViewer (a bibliometric software), bibliographic coupling, citation, co-authorship, keyword and network analysis have been carried out.
Findings
The analysis reveals that most of the research on cross-border mergers and acquisitions (CBMA) is concentrated in the context of developed markets, USA and UK being the largest. Most of the research till date is confined to wealth effects, value creation, corporate governance, socio-cultural aspects and various determinants of CBMA, all from the standpoint of the acquirer.
Practical implications
The present study highlights numerous opportunities for future research based on empirical analysis. There exists a dearth of studies around CBMA in the context of emerging nations which provides a relatively unexplored field to carry out research work.
Originality/value
The study makes use of a comprehensive list of keywords to have an extensive analysis. This is a pioneering study that has used bibliographic coupling of documents for content analysis and to the best of authors’ knowledge, no previous works on cross-border acquisitions have performed bibliographic coupling for this.