Data envelopment analysis (DEA) is a non-parametric approach for measuring the efficiency of decision making units (DMUs) that use multiple inputs in order to produce multiple outputs. In most real applications, DMUs have a two-stage network process which can be used for management of organizations such as hospitals, insurance companies, banks, and etc. The data are crisp in the standard DEA mo...

In this paper, we study a push-based multistage broadcast system, where a xed satellite schedule is transmitted to base stations. Each base station has the capacity to store some of the items transmitted. Base stations redistribute the data received from the satellite to the users through terrestrial wireless system. We show that, through use of intelligent joint cache management, and broadcast...

Introduction. Let £ = (£ , p, B, F) denote a two stage Postnikov system with stable fe-invariant. We announce results about H*(ÜE) as a Hopf algebra over the Steenrod algebra. Mod 2 cohomology is used exclusively. Unexplained notation is from [4] and [S]. 1 am grateful to D. Anderson, W. Massey, F . Peterson and H. Salomonsen for many useful remarks. We make the following assumptions on £, in a...

Based on credibility theory and two-stage fuzzy optimization method, this paper presents a type of multi-product multi-period (MPMP) production planning model. Since the proposed production planning problem includes fuzzy variable coefficients with an infinite support, it is infinite-dimensional optimization problem. The approximation of the production planning problem is discussed, and the con...

We consider alternative structures for subtractive interference cancellation (IC) detectors with single-user Viterbi decoding for convolutionally encoded code-division multiple-access (CDMA) systems on synchronous additive white Gaussian noise (AWGN) and time-uncorrelated Rayleigh fading channels. In the first structure interference cancellation with undecoded decisions (ICUD) is performed foll...

Zhong-Zhi Bai1,?, Violeta Migallón2,??, José Penadés2,??, Daniel B. Szyld3,??? 1 State Key Laboratory of Scientific/Engineering Computing, Institute of Computational Mathematics and Scientific/Engineering Computing, Chinese Academy of Sciences, P.O. Box 2719, Beijing 100080, P.R. China; e-mail: [email protected] 2 Departamento de Ciencia de la Computación e Inteligencia Artificial, Universidad ...

This paper presents a new robust two-stage Data Envelopment Analysis (DEA) for efficiency evaluation of the electricity power production and distribution companies. DEA has been widely used for benchmarking the electricity companies. Traditional studies in DEA consider systems as a whole when measuring the efficiency, ignoring the operation of individual processes within a system. To tackle thi...

This paper deals with a blind deconvolution (DB) problem for multiple-inputmultiple-output infinite impulse response (MIMO-IIR) systems. To solve this problem, we propose an eigenvector algorithm (EVA). In the proposed EVA, two kinds of EVAs are merged so as to give a good performance: One is an EVA and the other is a Robust EVA (REVA)which works with as little sensitive to Gaussian noise as po...