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To prove the effectiveness of the proposed design method, this study aims to propose the Fisher equation and temperature cooling fins that control high-speed aerospace vehicles.

A new approach whereby the control of aerospace vehicles can be achieved by fuzzy controller and appropriate Navier–Stokes equations in this article. The design of the controller based on models of Navier–Stokes equations simplified complex mathematical simulations and approximations.

If the fuzzy controller cannot stabilize the system, the Navier–Stokes fuzzy function is injected into the system as a controller tool, and the system is asymptotically stabilized by adjusting the fuzzy parameters.

The simulation results show that if the tuning frequency is high enough, the fuzzy controller and fuzzy observer can create chaotic movements by adjusting the dither amplitude appropriately. The demonstration of the Fisher equation and the temperature-cooled fin control problem for high-speed aerospace vehicles has displayed the benefits of combining fuzzy control with the Navier–Stokes equation.

Artificial neural networks (ANNs), which represent computational models simulating the biological neural systems, have become a dominant paradigm for solving complex analytical problems. ANN applications have been employed in various disciplines such as psychology, computer science, mathematics, engineering, medicine, manufacturing, and business studies. Academic research on ANNs is witnessing considerable publication activity, and there exists a need to track the intellectual structure of the existing research for a better comprehension of the domain. The current study uses a bibliometric approach to ANN business literature extracted from the Web of Science database. The study also performs a chronological review using science mapping and examines the evolution trajectory to determine research areas relevant to future research. The authors suggest that researchers focus on ANN deep learning models as the bibliometric results predict an expeditious growth of the research topic in the upcoming years. The findings reveal that business research on ANNs is flourishing and suggest further work on domains, such as back-propagation neural networks, support vector machines, and predictive modeling. By providing a systematic and dynamic understanding of ANN business research, the current study enhances the readers' understanding of existing reviews and complements the domain knowledge.

Various demands and requirements of foreign home-buyers from different background are yet unclear to most of the residential developers. The aim of this study is to blueprint a fuzzy mapping of psychological phenomena reflected in consumer behavior, and to develop a Fuzzy Analytic Hierarchy Process (Fuzzy-AHP) decision making model to assist residential developers in dealing with potential foreign customers. Through a questionnaire survey in the form of pair wise comparison matrix among 126 expatriates, this study introduces a new approach to assist residential developers dealing with expatriates' preference on house purchase in Malaysia in a simple and efficient way. With this fuzzy mapping, residential developers could utilize psychological phenomena to manipulate expatriates' preference on housing purchase rather than to merely comply passively.

Gives introductory remarks about chapter 1 of this group of 31 papers, from ISEF 1999 Proceedings, in the methodologies for field analysis, in the electromagnetic community. Observes that computer package implementation theory contributes to clarification. Discusses the areas covered by some of the papers ‐ such as artificial intelligence using fuzzy logic. Includes applications such as permanent magnets and looks at eddy current problems. States the finite element method is currently the most popular method used for field computation. Closes by pointing out the amalgam of topics.

The axisymmetric steady‐state convective‐diffusive thermal field problem associated with direct‐chill, semi‐continuously cast billets has been solved using the dual reciprocity boundary element method. The solution is based on a formulation which incorporates the one‐phase physical model, Laplace equation fundamental solution weighting, and scaled augmented thin plate splines for transforming the domain integrals into a finite series of boundary integrals. Realistic non‐linear boundary conditions and temperature variation of all material properties are included. The solution is verified by comparison with the results of the classical finite volume method. Results for a 0.500[m] diameter Al 4.5 per cent Cu alloy billet at typical casting conditions are given.

The purpose of this paper is to investigate the double-edged effects of supervisor bottom-line mentality (BLM) on subordinates' work-related behaviors (work performance and knowledge hiding) and the moderating role of subordinate gender.

The theoretical model was tested using a sample of 218 three-wave multi-source data collected from employees of five firms in southern China.

The results revealed that supervisor BLM is positively associated with subordinate BLM. Although subordinate BLM can enhance their work performance, it can also lead to knowledge hiding toward coworkers. Furthermore, these indirect effects are moderated by subordinate gender.

Managers should pay more attention to the potential positive and negative consequences of supervisor BLM and intervene to mitigate the negative impact of BLM.

This study is among the first to examine how supervisor BLM can be a mixed blessing and elicit both positive and negative behaviors from their subordinates. Moreover, by illuminating how subordinate gender moderates the relationship between supervisor BLM and subordinates' work-related behaviors, we enrich and extend the BLM literature.

The study aimed to determine the impact rate of the COVID-19 pandemic on Vietnam’s commercial housing demand as compared to other factors and proposes several policies to increase housing demand as a result of the pandemic.

The study randomly investigated 400 homebuyers during the COVID-19 pandemic. The structural equation model, SPSS20.0 and AMOS24.0 software were used to determine the impact of factor groups on housing demand.

The COVID-19 pandemic has a second impact after housing prices on commercial housing demand, followed by 10 other factors. The impact rates of factors range from 3.45% to 15.74%.

The study has only determined the extent of the impact of the COVID-19 pandemic on housing demand in Hanoi city, so it is necessary to continue to study this issue in other provinces and cities of Vietnam. The proposed research method would be consulted when it is necessary to determine the factors affecting housing demand in other countries around the world.

The study proposes some implications related to commercial housing demand in the context of the COVID-19 pandemic such as fighting the epidemic, supporting housing investors; reducing loan interest rates; increasing the time to pay for housing; supporting enterprises to stabilize production; strengthening real estate brokerage and carrying out administrative procedures online.

Investors and the State can use the implications to make the right housing decisions to provide housing for people and maintain social stability.

To the best of the authors’ knowledge, this paper presents for the first time a method to determine the impact of the COVID-19 pandemic on commercial housing demand in Vietnam. The paper also points out some specific factors affecting commercial housing demand that are different from those shown in previous research.

The purpose of this paper is to investigate the dynamic characteristics of a spiral groove liquid film seal considering the effect of cavitation.

A mathematical model of a spiral groove liquid film seal was established based on the mass-conserving Jakobsson–Floberg–Olsson cavitation boundary condition. The film rupture and film reformation boundaries were assumed to be unchanged under infinitesimal perturbation conditions. Governing equations under steady and perturbed states were solved by the finite element method, and then the dynamic characteristics of the spiral groove liquid film seal were theoretically investigated considering the effect of cavitation.

The results indicate that dynamic coefficients considering cavitation are smaller than those neglecting cavitation. The difference value is consistent with the change in cavitation area. The liquid film seal does not suffer axial instability whether considering cavitation, but its angular instability is more likely to occur when cavitation is considered.

For liquid lubricated non-contacting mechanical seals, the dynamic characteristics considering cavitation are investigated. The results are expected to provide a theoretical basis for improving the design method of liquid film seals.

The accelerating process of economic globalization and the increasingly fierce international competition are conducive to the promotion of the construction of the urban regional innovation system. Based on this, the Bayesian discriminant model was established in this paper, and the development stage of the regional innovation system was prejudged. Then according to the discriminant analysis, the results of the pre judgment were tested. In addition, based on the innovation system of urban planning and construction, a framework of urban planning analysis based on regional innovation system was put forward, which was used to guide regional planning and implementation, and was applied to the planning of Shanxi science and technology innovation city. It is proved that the fuzzy evaluation system based on Bayes is beneficial to the innovative planning of the new city.

Ecological small towns can attract a large number of rural surplus labors and ease the population pressure, how to carry out the planning and construction ecological town becomes a hotspot of research. Based on this, planning and construction of ecological small towns absorbing surplus rural labor based on fuzzy evaluation method were proposed. First of all, planning and construction of small towns under the concept of ecology were elaborated; and then the planning and construction strategies of small towns integrating ecological concepts were put forward, including the utilization of water resources, ecological the landscape and transportation planning; at the same time, a project for ecological small town in Hebei Province was taken as an example for the planning and design; in addition, the planning objectives and layout planning were analyzed and evaluated by fuzzy evaluation method, and the results confirmed the success of planning and design.