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Journal Home > Volume 13, Issue 1 - March 30, 2018

JAQM Volume 13, Issue 1 - March 30, 2018


Optimal Redundancy Allocation for Bridge Network System with Fuzzy Parameters
Laxminarayan SAHOO, Sanat Kumar MAHATO

The goal of this paper is to formulate and solve the redundancy allocation problem with fuzzy parameters as a non-convex integer nonlinear constrained optimization problem. Here, redundancy allocation problem of bridge network system with fuzzy parameters has been considered and its solution methodology has been proposed. The solution methodology is based on defuzzification of fuzzy parametric values and use of real coded genetic algorithm. Here, a new defuzzification technique based on statistical Beta distribution has been used for defuzzification. For solving the constrained optimization problems, we have used genetic algorithm based penalty function technique. Finally, a numerical example has been presented for illustration purpose.

Some Features with regard to Romanian Agriculture during the Transition Period
Iulia Elena TOMA, Andreea MIRICĂ

Agriculture is fundamental for the economy and the environment of the European Union. Eastern European countries, mostly based on agriculture and resource-intensive industry, suffered important structural changes after their integration in the European Union, with serious impacts of agriculture. In this context, this article, analyzes the agricultural sector in Romania in European context in order to make some recommendations to ensure sustainability on the long-run and efficient development on the short-run.

Where Is Life Better? An Analysis of Country Development using Data Mining Techniques
Octavian CEBAN

This study aims to analyze the degree of countries development taking into account two fundamental components: the economic aspect and the social aspect. For each of these two aspects, a set of data consisting of six variables will be analyzed, a composite index will be created using the Principal Component Analysis. With these two new dimensions (one for the economic aspect and one for the social aspect) clusters will be created using the k-means algorithm. In order to rank the countries we will build another index made up of the two indices previously formed. Data for the empirical application is most recently available, most of 2016. The study contains various types and examples of composite indices and some limitations.

An Analysis of Exchange Rates
Wen-Den CHEN, H. C. LI, Joseph McCARTHY, Coleen PANTALONE

The objective of this study is to investigate the distributions of and relationships between returns on a sample of eight different exchange rates. Given substantial evidence of kurtosis and skewness in the returns, a stable distribution is employed to describe returns and volatility (squared returns). Additionally, wavelet analysis is used to investigate the local correlation in time-frequency space of the exchange rates data. Wavelet analysis is useful in analyzing nonstationary data and in its ability to reveal causality.

Efficient Portfolio for Two Financial Assets. Case Study: BSE
Florentin ȘERBAN

This paper presents the description of the efficient frontier for a portfolio made of two stocks. We say that a portfolio of financial assets is efficient if no other portfolio can be formed that has the same risk as the original portfolio, but it has a higher profitability than it. To illustrate the efficiency of the method we used, we construct the efficient frontier which makes reference to the stocks listed at BSE.