نتایج جستجو برای: performance analysis ipa
تعداد نتایج: 3629844 فیلتر نتایج به سال:
In this paper we address the construction of efficient algorithms for the estimation of gradients of general performance measures of Gaussian systems. Exploiting a clever coupling between the normal and the Maxwell distribution, we present a new gradient estimator, and we show that it outperforms both the single-run based infinitesimal perturbation analysis (IPA) estimator and the score functio...
Nadine Bonberg ([email protected]) Beate Pesch ([email protected]) Thomas Behrens ([email protected]) Georg Johnen ([email protected]) Dirk Taeger ([email protected]) Katarzyna Gawrych ([email protected]) Christian Schwentner ([email protected]) Harald Wellhäußer ([email protected]) Matthias Kluckert ([email protected]) Gabriele Leng (gabriele...
BACKGROUND Invasive pulmonary aspergillosis (IPA) is a significant problem in patients with chemotherapy-induced prolonged neutropenia. Because pulmonary deposition of conidia is the first step in developing IPA, we hypothesized that inhalation of liposomal amphotericin B would prevent IPA. METHODS We performed a randomized, placebo-controlled trial of patients with hematologic disease with e...
INTRODUCTION AND AIMS Problematic drinking and executive functioning deficits are two known risk factors for intimate partner aggression (IPA). However, executive functioning is a multifaceted construct, and it is not clear whether deficits in specific components of executive functioning are differentially associated with IPA perpetration generally and within the context of problematic alcohol ...
The focus of this paper is to evaluate the benefits of a Japanese e-government project. In this research, the Importance-Performance Analysis (IPA) grid was used to measure the e-government benefits from the users’ perspective. A list of 27 government benefits was identified from the e-government literature reviews and each of the benefits was rated using a five point Likert scale. On a five po...
Introduction: The expansion of activities and performance areas of organizations, modern management issues mean that organizations are no longer satisfied with success in only a limited number of indicators. Mathematical models thus formed and gradually are developed for the assessment of organizations and provide the right tools. This study is conducted to provide a model for improving the ...
It has been shown that infinitesimal perturbation analysis (IPA) provides very efficient algorithms for estimating derivatives in a broad class of discrete event dynamic systems (DEDS). But in its simple form, it fails in most multiclass DEDS. In this paper, we propose a revised IPA for a multiclass G/G/1 queue.
In this paper, we consider a two-way relay system with two multi-antenna sources and multiple single-antenna relays and study the performances for various transmission schemes with the assumption that perfect channel state information (CSI) is available at both the sources and the relays. Although a transmission scheme that combines source beamforming and relay selection (BF-RS) is known to imp...
asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...
Introduction: Illiopsoas abscess (IPA) in children, and especially in neonates, is an uncommon condition which is difficult to diagnose clinically. The major presenting symptoms of IPA are leg or groin swelling, limitation of leg motion, and pain. The role of ultrasound and computed tomography in the diagnosis has been demonstrated, and the need for antibiotic therapy is emphasized. In our ...
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