A hybrid fuzzy-molecular controller enhanced with evolutionary algorithms: A case study in a one-leg mechanism     

Hiram Ponce  Mario Acevedo  Noel Esparza-Duran 《Journal of The Franklin Institute》2019,356(16):9432-9450

Intelligent control systems are able to work well in uncertain nonlinear systems, mainly for: changes in the operating point, presence of environmental noise and disturbances, uncertainty in sensor measurements, miscalibration, uncertain model plant, and others. For instance, fuzzy controllers have been widely studied and applied. Recently, artificial organic controllers (AOC) have been proposed as an ensemble of fuzzy logic and artificial hydrocarbon networks. However, a weakness in AOC is the lack of training methods for tuning parameters for desired output responses in control. In this regard, this paper aims to introduce an evolutionary optimization method, i.e. particle swarm optimization, for tuning artificial organic controllers. Three objectives are proposed for automatic tuning of AOC: overall error, steady-state error and settling time of output response. The proposed methodology is implemented in the well-known cart-pole system. Also, the proposed method is applied on a one-leg unstable mechanism as case study. Results validate that automatic tuning of AOC over simulation systems can achieve suitable output responses with minimal overall error, steady-state error and settling time.  相似文献   

A technology gap interpretation of growth paths in Asia and Latin America     

Mario Cimoli  João Basilio Pereima  Gabriel Porcile 《Research Policy》2019,48(1):125-136

This paper presents a North-South technology gap model which combines the Schumpeterian approach to technical and structural change with the Keynesian perspective on effective demand and the Balance-of-Payments (BOP) constraint as drivers of growth. Three are the contributions of the paper. First, it develops a model in which the technology gap, relative productivity and relative wages co-evolve and may generate different paths of convergence or divergence between South and North depending on the parameters of the model. Second, the parameters of the model are associated with different types of policies, which allows for discussing how these policies may change the growth path. Finally, the model is used to discuss the contrasting experiences of Asia and Latin America since 1970. Convergence in Asia and divergence in Latin America have been extensively debated topics in the literature on comparative economic development, which highlights the crucial role of industrial policy. It is argued that the results of the technology gap model are consistent with the findings of this literature and helps understand the forces behind convergence and divergence.  相似文献   

Biomaterials and additive manufacturing: osteochondral scaffold innovation applied to osteoarthritis (BAMOS project)     

Mario MONZóN 《浙江大学学报(A卷英文版)》2018,19(4):329-330

正Osteoarthritis(OA)is a degenerative joint disease,typified by a loss of quality of cartilage and changes in bone at the interface of a joint,resulting in pain,stiffness,and reduced mobility."According to the World Health Organization,40%of people over the age of 70 have OA.This joint disease affects  相似文献   

An advisor like me? Advisor gender and post-graduate careers in science     

Patrick Gaule  Mario Piacentini 《Research Policy》2018,47(4):805-813

We investigate whether having an advisor of the same gender is correlated with the productivity of PhD science students and their propensity to stay in academic science. Our analysis is based an original dataset – combined from dissertation abstracts, faculty directories and bibliometric data – covering nearly 20,000 PhD graduates and their advisors from U.S. chemistry departments. We find that students working with advisors of the same gender tend to be more productive during the PhD; and that female students working with female advisors are considerably more likely to become faculty themselves. We suggest that the under-representation of women in science and engineering faculty positions may perpetuate itself through the lower availability of same-gender advisors for female students.  相似文献   

Test-retest reliability and agreement of the SPI-Questionnaire to detect symptoms of digital ischemia in elite volleyball players     

Daan van de Pol  Tigran Zacharian  Mario Maas  P. Paul F. M. Kuijer 《Journal of sports sciences》2017,35(12):1173-1178

The Shoulder posterior circumflex humeral artery Pathology and digital Ischemia – questionnaire (SPI-Q) has been developed to enable periodic surveillance of elite volleyball players, who are at risk for digital ischemia. Prior to implementation, assessing reliability is mandatory. Therefore, the test-retest reliability and agreement of the SPI-Q were evaluated among the population at risk.

A questionnaire survey was performed with a 2-week interval among 65 elite male volleyball players assessing symptoms of cold, pale and blue digits in the dominant hand during or after practice or competition using a 4-point Likert scale (never, sometimes, often and always). Kappa (κ) and percentage of agreement (POA) were calculated for individual symptoms, and to distinguish symptomatic and asymptomatic players. For the individual symptoms, κ ranged from “poor” (0.25) to “good” (0.63), and POA ranged from “moderate” (78%) to “good” (97%). To classify symptomatic players, the SPI-Q showed “good” reliability (κ = 0.83; 95%CI 0.69–0.97) and “good” agreement (POA = 92%). The current study has proven the SPI-Q to be reliable for detecting elite male indoor volleyball players with symptoms of digital ischemia.  相似文献   

CDN ‐‐ Canada (Province du Québec)     

Yves Lenoir  Mario Laforest  Berthe Pellerin 《欧洲师范教育杂志》1994,17(1-2):57-60

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TRANSITION OF THE POLITICAL SYSTEM AND POLITICAL ATTITUDES IN PORTUGAL     

Bacalhau  Mario 《Int. Journal of Public Opinion Research》1990,2(2):141-154

The period of Portuguese authoritarian government, followingupon the heels of economic and social decline which the countrylived through after the installation of the republic in 1910,was bolstered politically, culturally, and economically by theexperience of the country during these 64 years. Economic andcultural changes after 1945, including development of the media,worker migrations, tourism, and the decolonialization movements,gave rise to attitudes and behavior of increasingly wide groupswho rejected authoritarianism and the monolithic political system.Various factors paved the way for the downfall of this regime,among them Oliveira Salazar's physical incapacity and his replacementby the more liberal but less prestigious Marcelo Caetano, theunease in public opinion caused by the sending of troops tothe colonies in Africa, and international and political andcultural pressures. Public opinion was in favor of the new politicalsystem, and, gradually consolidated its hold with the supportof the Western international community, and, in particular,the countries of the EEC. The political parties contributedto the development of the political attitudes of the Portuguesepopulation and ensured that the regime maintained itself withina liberal democratic framework.  相似文献   

EXPLORING HIGH-ACHIEVING STUDENTS’ IMAGES OF MATHEMATICIANS     

Mario Sánchez Aguilar  Alejandro Rosas  Juan Gabriel Molina Zavaleta  Avenilde Romo-Vázquez 《International Journal of Science and Mathematics Education》2016,14(3):527-548

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Conflict,education and the global south: New critical directions   总被引：1，自引：0，他引：1  

Mario Novelli  Mieke T.A. Lopes Cardozo 《International Journal of Educational Development》2008

This paper seeks to provide a starting point for a broader discussion on the development of a critical research agenda in the field of ‘Education and Conflict Studies’. We begin the paper with a brief overview of the field of Education and Conflict drawing on a series of recent ‘overviews’ of the field and locate this within the context of the changing geo-political situation that emerged in the wake of the collapse of the Soviet Union in the 1990s. This is followed by explaining what we understand by a critical research agenda and why we think it necessary. Thirdly, we explore a series of potentially interesting areas of inquiry that are currently absent or undeveloped within the field and which relate particularly to its ‘global’ dimension. Finally, we conclude by making some more reflective comments on our approach, its potential for making a positive contribution to both theory and practice within the field of Education and Conflict, and the need for more critically informed, but policy relevant research in this emerging area of inquiry.  相似文献   

Relational Mechanics and Implementation of Mach’s Principle with Weber’s Gravitational Force     

Mario J. Pinheiro 《Science & Education》2016,25(1-2):245-248

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