نتایج جستجو برای: 1999 have suggested an alternative nonparametric frontier approach namely multi
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while performance-based language assessment has led to an increased authenticity and content validity in the practice of writing assessment, the reliability of ratings has become a major issue. research findings have shown different reactions by native english speaker (nes) and non-native english speaker (nns) teachers to students’ writings. the focus of this study is on investigating whether i...
High frequency foreign exchange rate (HFFX) series are analyzed on an operational time scale using models of the ARCH class. Comparison of the estimated conditional variances focuses on the asymmetry and persistence issue. Estimation results for para-metric models connrm standard results for HFFX series, namely high persistence and no signiicance of the asymmetry coeecient in an EGARCH model. T...
this research uses a comprehensive method to solve a combinatorial problem of distribution network expansion planning (dnep) problem. the proposed multi-objective scheme aims to improve power system's accountability and system performance parameters, simultaneously, in the lowest possible costs. the dynamic programming approach is implemented in order to find the optimal sizing, siting and...
Partial linear model is very flexible when the relation between the covariates and responses, either parametric and nonparametric. However, estimation of the regression coefficients is challenging since one must also estimate the nonparametric component simultaneously. As a remedy, the differencing approach, to eliminate the nonparametric component and estimate the regression coefficients, can ...
This study presents an empirical analysis of the cost efficiency of a sample of Swiss multi-utilities operating in the distribution of electricity, natural gas and water. The multi-utilities that operate in different sectors are characterized by a strong unobserved heterogeneity. Therefore the measurement of their performance poses an important challenge for the regulators. The purpose of this ...
the aim of this thesis is an approach for assessing insurer’s solvency for iranian insurance companies. we use of economic data with both time series and cross-sectional variation, thus by using the panel data model will survey the insurer solvency.
Abstract In the last decades, there has been a growing interest in measuring efficiency of hospitals using different methodological approaches, mainly represented by data envelopment analysis (DEA) and stochastic frontier (SFA). this study, we estimate measures performance for sample Panamanian public over an 11‐year period (2005–2015) both traditional methods (DEA SFA) compare them with effici...
heuristics are often used to provide solutions for flow shop scheduling problems.the performance of a heuristic is usually judged by comparing solutions and run times on test cases.this investigation proposes an analytical alternative ,called asymptotic convergence ,which tests the convergence of the heuristic to a lower bound as problem size grows. the test is a stronger variation of worst cas...
Numerous therapeutics for prevention and treatment of anxiety have been suggested but many people select alternative medicine such as homeopathy. Homeopathy is an old system of medicine which is used as an effective treatment in both acute and chronic medical and psychological conditions. The ''Homeopathy'' term is a Greek word that means similar disease. Homeopathy has a holistic approach to t...
Abstract—There are many issues are related with lifetime and coverage in wireless sensor networks (WSNs). We try to locate heterogeneous sensors and route the routing information for minimization of network cost, maximization of network lifetime. We aim at provide better connectivity and coverage among the sensor nodes. For this we propose mathematical formulations and use an optimal solution f...
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