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Article

Fei Cheng, Kai Liu, Mao-Guo Gong, Kaiyuan Fu and Jiangbo Xi

The purpose of this paper is to design a robust tracking algorithm which is suitable for the real-time requirement and solves the mistake labeling issue in the appearance…

Abstract

Purpose

The purpose of this paper is to design a robust tracking algorithm which is suitable for the real-time requirement and solves the mistake labeling issue in the appearance model of trackers with the spare features.

Design/methodology/approach

This paper proposes a tracker to select the most discriminative randomly projected ferns and integrates a coarse-to-fine search strategy in this framework. First, the authors exploit multiple instance boosting learning to maximize the bag likelihood and select randomly projected fern from feature pool to degrade the effect of mistake labeling. Second, a coarse-to-fine search approach is first integrated into the framework of multiple instance learning (MIL) for less detections.

Findings

The quantitative and qualitative experiments demonstrate that the tracker has shown favorable performance in efficiency and effective among the competitors of tracking algorithms.

Originality/value

The proposed method selects the feature from the compressive domain by MIL AnyBoost and integrates the coarse-to-fine search strategy first to reduce the burden of detection. This paper designs a tracker with high speed and favorable results which is more suitable for real-time scene.

Details

International Journal of Intelligent Computing and Cybernetics, vol. 10 no. 3
Type: Research Article
ISSN: 1756-378X

Keywords

Content available
Article

Kai Liu

What is the relation between the land system with Chinese characteristics and the country's high-speed economic growth in the past decades? There is a lack of rigorous…

Abstract

Purpose

What is the relation between the land system with Chinese characteristics and the country's high-speed economic growth in the past decades? There is a lack of rigorous academic research based on the general equilibrium theory of macroeconomics on this issue.

Design/methodology/approach

By building a multisector dynamic general equilibrium framework with land system, this paper explores how the land supply mode with Chinese characteristics affects China's economic growth as well as its transmission mechanism.

Findings

This paper confirms the importance of land system with Chinese characteristics in explaining the mystery of China's high-speed economic growth. Counterfactual analysis shows that if China adopts a land system similar to that of other developing countries, GDP will drop 36% from the current level under the baseline model.

Originality/value

As the industrial sector shrinks relatively and the output elasticity of infrastructure decreases, this inhibitory effect will become more apparent. China should improve its land supply mode, especially expand the supply of commercial and residential land and reduce the cost of land in the service sector. This can promote better economic development in the future and thus improve household welfare and the structure of aggregate demand, replace “land-based public finance” and thus inhibit the “high leverage” risks of local governments.

Details

China Political Economy, vol. 3 no. 1
Type: Research Article
ISSN: 2516-1652

Keywords

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Article

Jinwu Xiang, Kai Liu, Daochun Li, Chunxiao Cheng and Enlai Sha

The purpose of this paper is to investigate the unsteady aerodynamic characteristics in the deflection process of a morphing wing with flexible trailing edge, which is…

Abstract

Purpose

The purpose of this paper is to investigate the unsteady aerodynamic characteristics in the deflection process of a morphing wing with flexible trailing edge, which is based on time-accurate solutions. The dynamic effect of deflection process on the aerodynamics of morphing wing was studied.

Design/methodology/approach

The computational fluid dynamic method and dynamic mesh combined with user-defined functions were used to simulate the continuous morphing of the flexible trailing edge. The steady aerodynamic characteristics of the morphing deflection and the conventional deflection were studied first. Then, the unsteady aerodynamic characteristics of the morphing wing were investigated as the trailing edge deflects at different rates.

Findings

The numerical results show that the transient lift coefficient in the deflection process is higher than that of the static case one in large angle of attack. The larger the deflection frequency is, the higher the transient lift coefficient will become. However, the situations are contrary in a small angle of attack. The periodic morphing of the trailing edge with small amplitude and high frequency can increase the lift coefficient after the stall angle.

Practical implications

The investigation can afford accurate aerodynamic information for the design of aircraft with the morphing wing technology, which has significant advantages in aerodynamic efficiency and control performance.

Originality/value

The dynamic effects of the deflection process of the morphing trailing edge on aerodynamics were studied. Furthermore, time-accurate solutions can fully explore the unsteady aerodynamics and pressure distribution of the morphing wing.

Details

Aircraft Engineering and Aerospace Technology, vol. 91 no. 1
Type: Research Article
ISSN: 1748-8842

Keywords

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Article

Kai-di Liu, Duo-Gui Yang, Guoliang Yang and Zhi-Tian Zhou

This paper aims to investigate the situation and evolution of sustainability performance in China.

Abstract

Purpose

This paper aims to investigate the situation and evolution of sustainability performance in China.

Design/methodology/approach

This paper adopts the global Malmquist-Luenberger (GML) productivity index based on data envelopment analysis and Tobit regression for analysis.

Findings

The results indicate the following: China’s sustainability performance has been improving since 2005 and is closely related to the national development strategy and supportive policy; regional gaps in sustainability are a prominent problem represented by the fact that South Central China is becoming a sustainability collapse zone; interprovincial heterogeneity is evident with the varying development speed and conditions; and the level of sustainability performance has a significantly positive correlation with the urbanization rate, investment completed in the treatment of industrial pollution, government appropriation for education and per capita area of paved roads, but it has a negative correlation with the possession of private vehicles.

Originality/value

As an application, this study assessing the GML productivity index of 30 provinces in China from 2005 to 2015 and analyse the sustainability performance on three regional levels (i.e. country level, regional level and provincial level). Tobit regression is also applied to recognize the factors related to the GML index with the results taken as references for policy suggestions. The results have implications for a comprehensive understanding of China's sustainability performance and policymaking in this field.

Details

International Journal of Energy Sector Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1750-6220

Keywords

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Article

Wenhui Cai, Fei Huang, Kai Liu and Mohammed Alaazim

As in real applications several alternating current (AC) currents may be injected to the electronic devices, this study aims to analyze their effects on the lifetime of…

Abstract

Purpose

As in real applications several alternating current (AC) currents may be injected to the electronic devices, this study aims to analyze their effects on the lifetime of the solder joints and, consequently, shed the light on these effects at the design phase for other researchers to consider.

Design/methodology/approach

In this paper, the authors investigated on current waveform shapes on the performance and reliability of the solder joints in electronic package. Three common and extensively used current shapes in several simulations and experiments were selected to study their effects on the solder joint performance.

Findings

The results demonstrate a sever thermal swing and stress fluctuation in the solder joint induced in the case of triangle current type because the critical states lack any relaxation time. In fact, the stress intensification in the solder under application of the triangle current type has been shown to contribute to increasing brittle intermetallic compounds. An accelerated increase of on-state voltage of power semiconductor was also observed in under application of the triangle current type.

Originality/value

The originality of this paper is confirmed.

Details

Soldering & Surface Mount Technology, vol. 33 no. 2
Type: Research Article
ISSN: 0954-0911

Keywords

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Article

Kai Liu, Masato Yamazaki and Atsushi Koike

The purpose of this paper is to compare the Armington elasticities for world average values and country-specific values and obtain evidence for whether the world average…

Abstract

Purpose

The purpose of this paper is to compare the Armington elasticities for world average values and country-specific values and obtain evidence for whether the world average elasticities and the “rule of two”, which have been applied in many papers, are accurate for cereals in trade policy studies related to an individual country.

Design/methodology/approach

The authors use panel data with a nested model to estimate and compare Armington elasticities based on world average values and country-specific values from 10 countries and regions.

Findings

The results suggest that cereals’ elasticities vary between world average values and country-specific values, and the “rule of two” is not strictly applicable. In fact, the “less than two” concept fits well in many cases.

Originality/value

This study sheds light on the effects of country heterogeneity on the elasticities and the accuracy of using world average elasticities in a trade policy study for an individual country. In addition, this paper offers estimated values of country-specific elasticities for 10 countries and regions.

Details

Journal of Chinese Economic and Foreign Trade Studies, vol. 13 no. 1
Type: Research Article
ISSN: 1754-4408

Keywords

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Article

Xuhui Wang, Kewei Liu, Kai Wang, Jian Gong, Yanjun Wang and Yajiang Fan

Urban parks play a key role in recreational activities, public health, and ecosystem services in urban areas. Using GIS and Fragstats, this study investigated the…

Abstract

Urban parks play a key role in recreational activities, public health, and ecosystem services in urban areas. Using GIS and Fragstats, this study investigated the spatiotemporal dynamics of urban parks in Xi'an, China from 1949 to 2015 and the corresponding driving forces. The results show that the number and area of parks in Xi'an increased constantly during this period, especially from 2000 to 2015. Up to 2015, small green spaces, usually adjacent to streets, occupied the largest proportion among all types of parks. Archaeological parks were the largest in total area, but wetland parks were leading in average size of a single park. The density of parks was negatively correlated with their distance to the Clock Tower at the center of Xi'an. The dynamics of urban parks in highly urbanized areas were significantly different from that of their counterparts in suburban areas. Driving forces such as urban planning, urbanization and green space policies, and milestone events in the city's development jointly had a great effect on the distribution of parks in Xi'an. The research outcomes will support the upcoming Green Space Planning of Xi'an and benefit the pursuit of sustainability and human wellbeing.

Details

Open House International, vol. 42 no. 3
Type: Research Article
ISSN: 0168-2601

Keywords

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Case study

Lynn A. Isabella and Gerry Yemen

Filtroil had opened a new factory that was a merger between Shenzhen Filtroil and its supplier, Liu Li—whose own factory was on the verge of bankruptcy. But the supplier…

Abstract

Filtroil had opened a new factory that was a merger between Shenzhen Filtroil and its supplier, Liu Li—whose own factory was on the verge of bankruptcy. But the supplier had begun making excessive demands and threatening to delay product shipment to the United States if his conditions were left unmet. The case reveals the options that could be taken to manage the situation. The case is suitable for use in organizational behavior, human resource management, and strategy classes at the MBA and executive education levels.

Abstract

This study investigates whether and when during the life cycle women fall behind in terms of career progression because of children. We use 1987–1997 Norwegian panel data that contain information on individuals’ position in their career hierarchy as well as a direct measure of their promotions. We measure overall promotions as increases in rank within the same establishment as well as in combination with an establishment change. Women with children are 1.6 percentage points less likely promoted than women without children; this is what we refer to as the family gap in climbing the career. We find that mothers tend to enter on lower ranks than non-mothers. Thirty-seven percent of the gap can be explained by rank fixed effects and human capital characteristics. A large part remains unexplained. Graphical analyses show that part of the difference already evolves during the early career. Part of this seems related to the relatively low starting ranks.

Details

Gender Convergence in the Labor Market
Type: Book
ISBN: 978-1-78441-456-6

Keywords

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Article

Kai‐Sen Liu and Kitty G. Dickerson

This study examines the selection criteria, country preference and people which influence Taiwanese male office workers' business apparel purchases in Taiwan. A partial…

Abstract

This study examines the selection criteria, country preference and people which influence Taiwanese male office workers' business apparel purchases in Taiwan. A partial model by Engel, Blackwell and Miniard (EBM) was used as the framework to indicate that the culture factor directly affects consumers' decision‐making process of purchase behaviour. A total of 232 questionnaires from male consumers in Taipei, Taiwan, were used for data analyses. Selection criteria, country preference and influential people were analysed by demographic variables including age, marital status, education, occupation, and yearly expenditure for business apparel purchase. Overall, the respondents ranked the selection criteria in order of descending importance as: fit, colour, price, style, quality, brand name, ease of care, fibre content and country. The order of country preference was rated first to last as: Taiwanese, Italian, US, French, British, Japanese, Hong Kong, German and Canadian. Individuals who influenced purchases were ranked as: my own opinion, wife or girlfriend, female friend, family member or other relative, male friend and salesperson. This research suggests that if foreign companies want to market to Taiwanese male consumers, they must develop appropriate strategies that help to change the domestic bias of the older males, or choose to appeal to younger males in hopes of developing long‐term brand loyalty. Additionally, the price strategies should be adjusted to be more competitive in Taiwan's marketplace. Meanwhile, fit and colour of apparel products may also need to be altered or modified in order to reach Taiwanese male consumers' demands.

Details

Journal of Fashion Marketing and Management: An International Journal, vol. 3 no. 3
Type: Research Article
ISSN: 1361-2026

Keywords

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