Search results

The purpose of this paper is to investigate the weighted pseudo-almost periodic solutions of shunting inhibitory cellular neural networks (SICNNs) with time-varying delays and distributed delays.

The principle of weighted pseudo-almost periodic functions and some new mathematical analysis skills are applied.

A set of sufficient criteria which guarantee the existence and exponential stability of the weighted pseudo-almost periodic solutions of the considered SICNNs are established.

The derived results of this paper are new and complement some earlier works. The innovation of this paper concludes two points: a new sufficient criteria guaranteeing the existence and exponential stability of the weighted pseudo-almost periodic solutions of SICNNs are established; and the ideas of this paper can be applied to investigate some other similar neural networks.

This paper aims to present a new method, named as augmented polynomial dimensional decomposition (PDD) method, for robust design optimization (RDO) and reliability-based design optimization (RBDO) subject to mixed design variables comprising both distributional and structural design variables.

The method involves a new augmented PDD of a high-dimensional stochastic response for statistical moments and reliability analyses; an integration of the augmented PDD, score functions, and finite-difference approximation for calculating the sensitivities of the first two moments and the failure probability with respect to distributional and structural design variables; and standard gradient-based optimization algorithms.

New closed-form formulae are presented for the design sensitivities of moments that are simultaneously determined along with the moments. A finite-difference approximation integrated with the embedded Monte Carlo simulation of the augmented PDD is put forward for design sensitivities of the failure probability.

In conjunction with the multi-point, single-step design process, the new method provides an efficient means to solve a general stochastic design problem entailing mixed design variables with a large design space. Numerical results, including a three-hole bracket design, indicate that the proposed methods provide accurate and computationally efficient sensitivity estimates and optimal solutions for RDO and RBDO problems.

The paper desribes an energy‐based framework for a simple model with two degrees‐of‐freedom that statically exhibits bifurcations or limit‐points. Dynamically, the equivalent system may respond with small amplitude motion (being dynamically stable) or it may ‘escape’ and move to exhibit ‘large amplitude motion’ (thus becoming dynamically unstable). The energy framework is used to define bounds for these stable and unstable motions. These bounds are used to provide a framework for a set of dynamic finite element computations based on conventional finite element techniques.

Although sustainability is a popular topic in the past decade, there is a lack of research to identify the driving factors for developing countries. The purpose of this paper is to investigate the driving factors for achieving eco-innovation.

An in-depth case study is employed to address the objective outlined above. A Chinese company with more than 1,200 employees was selected to address the research question.

By fuzzy decision-making trial and evaluation laboratory and interpretive structural modelling analysis, the driving factors for eco-innovation are identified, and the priority of different factors has also been extracted.

This is among the first studies to carry similar analysis regarding eco-innovation. More specifically, this is perhaps the first study to take this approach and to analyse this topic in a developing country.

The purpose of this paper is to employ stochastic techniques to increase efficiency of the classical algorithms for solving nonlinear optimization problems.

The well-known simulated annealing strategy is employed to search successive neighborhoods of the classical trust region (TR) algorithm.

An adaptive formula for computing the TR radius is suggested based on an eigenvalue analysis conducted on the memoryless Broyden-Fletcher-Goldfarb-Shanno updating formula. Also, a (heuristic) randomized adaptive TR algorithm is developed for solving unconstrained optimization problems. Results of computational experiments on a set of CUTEr test problems show that the proposed randomization scheme can enhance efficiency of the TR methods.

The algorithm can be effectively used for solving the optimization problems which appear in engineering, economics, management, industry and other areas.

The proposed randomization scheme improves computational costs of the classical TR algorithm. Especially, the suggested algorithm avoids resolving the TR subproblems for many times.

This study investigated the viability of using a Pan‐European approach for professional service offerings in Europe by first establishing measurement equivalence and then exploring the influence of culture on service quality and customer satisfaction. Utilizing scenarios involving a dental office visit, respondents from Portugal, France, and Germany participated in a 2X2 factorial experiment in which the researchers manipulated both expectations (low/high) and service performance (low/high). Respondents from France and Portugal expressed similar levels of customer satisfaction and perceived service quality, which were significantly different from those of the German respondents except when both expectations and performance were low.

Risk notification is part of a focus on preventive medicine that is dominant in contemporary Western biomedicine. Genomics has forecasted great advances in alleviating disease and prolonging human life, moving from a reactive to a preventative practice. However, in doing so, genomics redraws boundaries, potentially classifying all people as possible carriers of malfunctioning genes. This chapter presents a critical review of the practice of ‘risk notification’ as undertaken by familial cancer genetic testing services, focusing on the right to be informed or not to be informed and implications of knowing.

With backgrounds in anthropology, psychology and public health, the authors draw upon literature around risk notification from a range of disciplines.

In the context of familial cancer, clients may be asked to provide contact information for biological family members to inform them of their potential genetic risk. Through these processes a number of tensions and issues may emerge that relate to fundamental bioethical principles. The ability and decision whether to know, or conversely, to not know, is ethically fraught. We consider the roles and rights of family members and clients, as well as the broader goal of population health.

While much attention has been devoted to clients’ right to know in the context of medical research and treatment, relatively little work has examined the right not to know and adverse consequences of knowing. This review addresses concerns which have rarely been critically examined and debated in the context of risk notification of biological family members.

Proposes a computationally‐simple method, based on the centroid solid angle, for computing the probability distributions of the natural resting aspects of small parts, the fore‐knowledge of which can improve the design of vibratory feeders and orienting devices. The centroid solid angle (CSA) hypothesis postulates that the probability of a part coming to rest on a particular aspect is directly proportional to the solid angle subtended by the aspect with respect to the centroid (the centroid solid angle) and inversely proportional to the height of the centroid from the aspect in question. When benchmarked against Boothroyd’s energy barrier method, its results did not deviate from those of the energy barrier method by more than 0.04. Examines studies of a cylindrical prismatic part and a symmetrical T‐shaped prism. The drop tests used to obtain the authors’ empirical data were validated by experiments conducted on vibratory bowl feeders, subjected to different vibration frequencies. The tracks of one of the bowls was coated with urethane to simulate a soft surface. In the case of both frequencies, the empirical results are in generally good agreement with the predictions of the CSA hypothesis; the largest deviation was 0.07. As for the urethane track, the largest deviation was 0.08, thereby corroborating the results of the drop test method.

The objective is to determine if there are groups of subsidiaries that are different in regard to the implementation of strategies, structures, and processes and the transfer of marketing knowledge in emerging markets.

A survey with 101 largest foreign subsidiaries located in Brazil was conducted. The data collection process was conducted online and by telephone.

Three subsidiary groups based on the configuration of their international marketing activities were characterized: Cluster 1, called “Subsidiary with Knowledge Marketing Activities”; Cluster 2, called “Subsidiaries with Global Marketing Activities”; and Cluster 3, called “Subsidiaries with Local Marketing Activities.” Compared to the two other groups, Cluster 1 is the group with the minor number of companies, but it has a better strategic performance than other clusters.

This study was developed in only one emerging country, Brazil, and with 101 subsidiaries from MNCs. This could be extended to other countries, such as China, Russia, India, and Turkey and with more subsidiaries. Related to the construct measurements, one limitation is the qualitative measure of performance.

Subsidiaries that work with global marketing should pool their efforts to create and transfer marketing knowledge to improve their performance. Subsidiaries with local marketing activities may even perform more satisfactorily in the short term, but they should concern to contribute to the overall competitive edge of the corporation.

The discussion about marketing in emerging markets and the way in which the transfer of marketing knowledge can be reflected in the performance.

This paper studies the moderating effect of industry structure on strategy-performance relationships in international markets.

We have carried out a survey among a sample of German, Norwegian and Singaporean small and medium sized firms, and test – using structural equation modelling (EQS) – four hypotheses founded in industrial organisation,

We find that industry structure indeed matters. The general picture is that cautious internationalisation strategies are more effective in fragmented industries than in concentrated industries. Also, with somewhat more nuance, global marketing strategies – such as standardisation and integration – seem by and large to be more effective in concentrated industries than in fragmented industries.

The operationalisation of industry structure in an international context is challenging and we have deviated from the traditional Herfindahl–Hirschman Index. This may be a limitation but we also consider it a strength, given the weaknesses of this index in an international setting. The study is cross-sectional and should ideally follow each firm over time, again a challenging endeavour.

Despite a considerable amount of studies on strategy – performance relationships in international markets, there is no general agreement on the topic. We argue that a contingency approach needs to be taken, and that industry structure is one important factor not yet analysed.