Search results

Bat algorithm (BA) is a global optimization method, but has a worse performance on engineering optimization problems. The purpose of this study is to propose a novel chaotic bat algorithm based on catfish effect (CE-CBA), which can effectively deal with optimization problems in real-world applications.

Incorporating chaos strategy and catfish effect, the proposed algorithm can not only enhance the ability for local search but also improve the ability to escape from local optima traps. On the one hand, the performance of CE-CBA has been evaluated by a set of numerical experiment based on classical benchmark functions. On the other hand, five benchmark engineering design problems have been also used to test CE-CBA.

The statistical results of the numerical experiment show the significant improvement of CE-CBA compared with the standard algorithms and improved bat algorithms. Moreover, the feasibility and effectiveness of CE-CBA in solving engineering optimization problems are demonstrated.

This paper proposed a novel BA with two improvement strategies including chaos strategy and catfish effect for the first time. Meanwhile, the proposed algorithm can be used to solve many real-world engineering optimization problems with several decision variables and constraints.

Fresh catfish (Clarias gariepinus) is highly perishable. This paper aims to investigate the drying characteristics and quality of body-mass dehydrated catfish to determine the effective dehydration parameters for preservation.

Brine concentration (3-9 per cent), brining time (30-90 min) and drying temperature (90-130°C) interacted using the response surface methodology. Preliminary experiments were conducted to select treatments. Moisture content and ratio and drying rate were determined and fitted into five thin-layer drying models; the goodness of fit was evaluated by average grade ranking of the regression parameters. Proximate compositions and microbial load of dehydrated catfish were determined using standard methods.

Treatments with 110°C gave initial higher drying rate (0.034-0.043 kg H₂O/kg solid/h) and shorter drying time (20-21 h). Drying occurred at two falling rate periods. Midilli model ranked first in fitting the drying data. It explained up to 99.6-99.7 per cent of the total variations in the independent variables with low values of error terms; RMSE was 0.02131-0.01794 and χ² was 0.00037-0.00043, indicating good predictive quality. Processing parameters positively and significantly (p < 0.05) influenced the proximate compositions of dehydrated catfish. Treatment: 6 per cent brine, 90 min and 110°C presented the most effective dehydration parameters for quality preservation of body-mass catfish.

The dehydration technique used in this study could enhance nutritive quality and storage stability of body-mass dehydrated catfish that could serve as a useful and convenient tool for commercial application.

Hygienically processed dehydrated catfish of good quality could be used as a source of nutrients to ameliorate malnutrition and reduce post-harvest losses of catfish.

The effective processing parameters established is an important step to harness the high nutrients and economic values embedded in catfish.

The purpose of this paper is to examine the effect of regulatory reform on the asset allocation and capitalization of Chinese banks from 2002 to 2007, a period following China's entry into the World Trade Organization (WTO).

The evidence rejects a hypothesis that the four categories of banks operating in China – the Big Four, Majority State, Majority Private, and Majority Foreign banks have converged toward common targets. Supplemental analysis indicates that domestic banks, but not foreign banks, adjust equally to their targets.

The paper concludes that, although Chinese banking remained segmented during this unique transitional period, a more uniform pattern has emerged for those Chinese banks that are domestically owned.

The authors employ a methodology that is explicitly designed to determine if banks have converged toward common approaches to asset allocation and capitalization, which has not been studies previously.

The purpose of this paper is to analyse how fish farmers manage climate-related risks and explore possible ways to strengthen risk management under current and future climate.

In total, 662 fish farmers in sites across Northern Thailand were interviewed about risks to the profitability of their fish farms and ways such risks were managed. Nonlinear canonical correlation analysis was used to relate risk factors to management practices at farm and river levels. In total, 68 in-depth interviews with farmers and other stakeholders provided additional information on climate risk management practices.

Farmers use a combination of adjustments to rearing practices, cropping calendars and financial and social measures to manage those risks, which they perceive as being manageable. Many risks are season, river and place specific; implying that the risk profiles of individual farms can vary substantially. Individual risks are often addressed through multiple practices and strategies; conversely, a particular management practice can have a bearing on several different risks. Farmers recognize that risks must be managed at farm and higher spatial and administrative scales. Social relations and information play critical roles in managing these complex combinations of risks.

This is one of the first papers to report in detail on how inland fish farmers manage climate-related risks. It underlines the need to consider multiple spatial and temporal scales and that farmers do not manage individual climate-related risks in isolation from other risks.

Fish is subjected to different methods of preparation and a major challenge facing consumers is maintaining and preserving the nutritional quality of cooked fish. This paper aims to examine the effects of different cooking methods (baking, boiling, deep‐frying, pan‐frying, microwaving and grilling) on total carotenoids and lycopene content in muscle and skin fractions of Omani kingfish.

Fresh, commercially harvested kingfish samples were purchased from a supermarket and prepared using six commonly used cooking methods. Raw fish samples were used as control. Muscle and skin fish portions for each cooking method and raw samples were analyzed for total carotenoids and lycopene contents.

The paper finds that cooking methods affected kingfish skin and muscle differently. The positive effects of cooking methods on kingfish muscle scored from high to low are as follows for total carotenoids content: grilling, microwaving, pan‐frying, boiling, deep‐frying and baking; and grilling, microwaving, boiling, deep‐frying, baking and pan‐frying for lycopene content. Baking resulted in the highest increase in both total carotenoids and lycopene contents in the skin, followed by grilling and pan‐frying for total carotenoids. In conclusion, grilling, followed by microwaving, is finds to be the best cooking method for high‐carotenoids content and healthy eating of kingfish.

This is the first paper to be reported on the effects of different cooking methods on total carotenoids content (including lycopene) in skin and muscle of kingfish caught in the warm waters of the Gulf of Oman.

This study aims to explore the influence mechanism of digital platform capability on firm performance in the business-to-business (B2B) context. This study draws on the core competence theory and the resource-based view and includes resource identification, resource allocation and intrapreneurship into the research framework.

Data were collected from 167 B2B firms with survey questionnaires in central, eastern and southeastern coastal areas of China. The firms were mainly involved in e-commerce, manufacturing, service industry and internet technology. Participants were mainly middle and senior managers with a comprehensive grasp of their firms’ information.

This study found that digital platform capability has a positive impact on a B2B firm’s performance. Resource identification, resource allocation and intrapreneurship play a chain mediating role between digital platform capability and firm performance. That is, digital platform capability could promote employee intrapreneurship through resource identification and resource allocation, thereby improving firm performance.

Aiming to gain performance, firms should pay attention to the construction of digital platforms, increase venture capital investment and provide more resources to support intrapreneurship.

Based on empirical evidence, to the best of authors’ knowledge, this is the first attempt to link digital platform capability and firm performance in the B2B context of emerging markets, providing a new perspective to clarify its relationship mechanism.

There have been plenty of emergencies occurred in tourism all over the world in recent years. These events and disasters have brought the tourists and relevant organizations enormous loss of life and property. The main reasons are the lack of holistic coordination among different departments and response for social responsibility. In the process of prevention and response of tourism emergency, the local governments need to take synergic action. Meanwhile, the positive participation in the tourism emergency rescue is one of the ways to share social responsibility. This paper aims to examine the early-warning management of regional tourism emergencies, in order to minimize the loss on both tourists' life and money, from the perspective of systematic thinking.

The paper establishes a regional tourism emergency response model based on holistic assessment approach and Bayesian network technology. It analyzes most critical factors of regional tourism emergency and the mutual influence among them. Thereafter, it employs the Bayesian network technology to assess the influence of several factors on the final magnitude of casualties holistically. Based on this, the paper proposes the response principle and the response process to regional tourism emergency.

This paper constructs the “FRES” principle about the holistic response to regional tourism emergency, including “fulfillment of social responsibility”, “rapid action”, “experience accumulation” and “synergic response”. Based on this principle, the paper suggests a general process on the holistic response to regional tourism emergency. Finally, the paper takes the mudslides emergency in Taiwan on October 23, 2010 as an example to conduct an empirical analysis. The paper gives an optimal holistic solution to the responding process of this event in the light of the “FRES” principle.

This paper explains the social responsibility related to the regional tourism emergencies and employs the Bayesian network technology to analyze the systematical responding process to tourism emergency. It proposes originally a “FRES” principle and a general process on the response to regional tourism emergency which are proven to be effective in systematical response to regional tourism events. The research results can facilitate the various local governments to jointly fulfill their social responsibilities and optimize the management of regional tourism emergencies in a holistic way.

The purpose of this paper is to benchmark national culture in the context of decent work practices in project-based industry of the United Arab Emirates (UAE). This should help in achieving successful short-term migration. The study also aims to validate the decent work practice indicators for Bangladeshi, Chinese, Indian and Pakistani construction labourers working in the UAE.

This study takes an ethnographic approach in its qualitative research methodology. The research involves observational methodology for its data collection during the execution of construction projects, semi-structured interviews to confirm the data collection during observational approach and a narrative methodology for the data collection within the labour camps, grassy fields and town streets. The qualitative data were expressed in quantitative terms to signify statistically the effect of the national culture in the context of decent work practices in this industry. Hence, the research involved triangulation in its data collection and analysis.

The study reveals that the national cultures of the migrant construction labourers in this context are not the same as identified by Geert Hofstede about four decades earlier. It was found that Indians were high in uncertainty avoidance, Pakistani construction labourers were high in masculinity, Bangladeshi construction labourers were low in long-term orientation (LTO) and individualism and Chinese labourers were found to have high individualism and LTO. This study verified decent work practice indicators for Indian, Pakistani and Bangladeshi construction labourers and identified different decent work practice indicators for Chinese construction labourers in the UAE than Indian, Pakistani and Bangladeshi construction labourers.

The study was limited to the construction labourers in the UAE. The data were collected during observation while execution construction projects and limited to visiting construction labour camps, grassy fields and town streets.

The differences in the national culture of the migrant construction labourers and the decent construction practices in the UAE have economic, social and environmental implications for construction labourers in the Arab world, for both migrant sending and receiving countries. Understanding and managing various national cultures and improving prevalent decent work practices would help to improve economic and social condition of the migrant construction labourers and help to arrest the advance of looming health problems.

The study identifies the national cultures of the migrant construction labourers in the context of decent work practices in the UAE. Improvement in the decent work practices of the migrant sending countries and the UAE and understanding of the culture of the migrants will help in preparing effective migration policy by both migrant sending and receiving countries. No study was found to have identified national cultures in the context of decent work practices and assessed the need for improvement in this regard.

The purpose of this paper is to solve economic emission dispatch problem in connection of wind with hydro-thermal units.

The proposed hybrid methodology is the joined execution of both the modified salp swarm optimization algorithm (MSSA) with artificial intelligence technique aided with particle swarm optimization (PSO) technique.

The proposed approach is introduced to figure out the optimal power generated power from the thermal, wind farms and hydro units by minimizing the emission level and cost of generation simultaneously. The best compromise solution of the generation power outputs and related gas emission are subject to the equality and inequality constraints of the system. Here, MSSA is used to generate the optimal combination of thermal generator with the objective of minimum fuel and emission objective function. The proposed method also considers wind speed probability factor via PSO-artificial neural network (ANN) technique and hydro power generation at peak load demand condition to ensure economic utilization.

To validate the advantage of the proposed approach, six- and ten-units thermal systems are studied with fuel and emission cost. For minimizing the fuel and emission cost of the thermal system with the predicted wind speed factor, the proposed approach is used. The proposed approach is actualized in MATLAB/Simulink, and the results are examined with considering generation units and compared with various solution techniques. The comparison reveals the closeness of the proposed approach and proclaims its capability for handling multi-objective optimization problems of power systems.

Assesses differences in the economies of Taiwan and China to determine whether or not perceptions of quality management differences exist among managers of electronic firms in the two countries. Statistical results suggest that these two groups of managers not only differ in how they define quality, they also differ in their beliefs about the relationship between quality management and organizational outcomes, the extent to which quality management is practiced in the firm, and how the quality of their products compares with products produced by competitors in other countries.