نتایج جستجو برای: mvue
تعداد نتایج: 29 فیلتر نتایج به سال:
We propose an algebraic combinatorial method for solving large sparse linear systems of equations locally that is, a method which can compute single evaluations of the signal without computing the whole signal. The method scales only in the sparsity of the system and not in its size, and allows to provide error estimates for any solution method. At the heart of our approach is the so-called reg...
managers always consider the precise estimation of sediments in watersheds due to various conditions, such assoil and water resources management, construction, infrastructure and economical and social issues. in this condition,an optimized determination of sediment rating equation (typical method until now for sediment yield estimation) isessential to investigate sediment yield in rivers. in th...
برآورد صحیح حجم رسوبات حمل شده توسط رودخانه ها در پروژه های آبی از اهمیت زیادی برخوردار است .در این میان معادله سنجه رسوب بیشترین کاربرد را در برآورد رسوبدهی حوزه های آبخیز دارد. لذا معادله سنجه بهینه بایستی با دقت قابل قبولی تهیه شود. بدین منظور در این تحقیق 10 ایستگاه هیدرومتری (8 ایستگاه هیدرومتری استان فارس و2 ایستگاه هیدرومتری استان بوشهر) مورد بررسی قرارگرفت، برای هر ایستگاه 6 منحنی سنجه ...
In statistics parameter theory, usually the parameter estimations have two kinds,one is the least-square estimation(LSE),and the other is the best linear unbiased estimation (BLUE).Due to the determining theorem of minimum variance unbiased estimator(MVUE),the parameter estimation of BLUE in linear model is most ideal.But since the calculations are complicated or the covariance is not given,peo...
Managers always consider the precise estimation of sediments in watersheds due to various conditions, such assoil and water resources management, construction, infrastructure and economical and social issues. In this condition,an optimized determination of sediment rating equation (typical method until now for sediment yield estimation) isessential to investigate sediment yield in rivers. In th...
The aim of this study was to estimate suspended sediment by the ANN model, DT with CART algorithm and different types of SRC, in ten stations from the Lorestan Province of Iran. The results showed that the accuracy of ANN with Levenberg-Marquardt back propagation algorithm is more than the two other models, especially in high discharges. Comparison of different intervals in models showed that r...
برآورد صحیح از میزان رسوب حملشده توسط سیستم آبراهه یک حوزه آبخیز در طراحی تمام پروژههای آبی و حفاظت خاک ضروری میباشد. با توجه به تبدیل لگاریتمی دادههای دبی – رسوب، نیاز به اصلاح اریب زیاد معادلات رگرسیونی سنجه رسوب میباشد. از این رو تحقیق حاضر درصدد ارزیابی عملکرد 6 روش سازمان خواروبار و کشاورزی جهانی (FAO)، روش اصلاحگر (LS)، روش اداره عمران اراضی ایالات متحده(USBR)، برآوردکننده نااریب با...
the aim of this study was to estimate suspended sediment by the ann model, dt with cart algorithm and different types of src, in ten stations from the lorestan province of iran. the results showed that the accuracy of ann with levenberg-marquardt back propagation algorithm is more than the two other models, especially in high discharges. comparison of different intervals in models showed that r...
The Gauss Markov theorem states that the weighted least squares estimator is a linear minimum variance unbiased estimation (MVUE) in models. In this paper, we take first step towards extending result to non-linear settings via deep learning with bias constraints. classical approach designing MVUEs through maximum likelihood (MLE) which often involves real-time computationally challenging optimi...
The problem we are seeking to solve is the continual estimation of a set of parameters whose values change over time. Updating is achieved by combining a set of observations or measurements z(t) which contain information about the signal of interest x(t). The role of the estimator is to provide an estimate x̂(t+ ) at some time t+ . If > 0 we have a prediction filter, if < 0 a smoothing filter an...
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