نتایج جستجو برای: Local moment constraints

تعداد نتایج: 755597  

ژورنال: :نشریه علمی-پژوهشی مهندسی معدن 2012
محمد علی ملکی تهرانی امید اصغری خاویر امری

این مطالعه به بررسی شبیه­سازی زمین آماری عیار در کانسار هایی که توزیع عیار در آن ها روند فضایی نشان می­دهد می پردازد. این روند می­تواند به وسیله تعریف داده های شرطی دوباره تولید شود. این داده های شرطی می توانند داده های سخت موجود و یا تعدادی داده نرم باشند که با استفاده از نتایج کوکریجینگ تولید می شوند. فرآیند شرطی سازی، تحقق های صورت گرفته را مجبور به پیروی از این  داده ها می کند و بنابراین می...

2009
Justin Yip Pascal Van Hentenryck

This paper presents the first experimental evaluation of the length-lex domain for set variables. The implementation is based on bound-consistency algorithms proposed in earlier work and two novel technical contributions: a generic filtering algorithm which automatically pushes ordering constraints into symmetric binary constraints with only a logarithmic overhead and an adaptation of symmetry-...

Journal: :The Annals of Probability 2020

2005
Steven David Prestwich Andrea Roli

The effects of combining search and modelling techniques can be complex and unpredictable, so guidelines are very important for the design and development of effective and robust solvers and models. A recently observed phenomenon is the negative effect of symmetry breaking constraints on local search performance. The reasons for this are poorly understood, and we attempt to shed light on the ph...

Journal: :SIAM Journal on Optimization 2016
Jie Zhang Huifu Xu Liwei Zhang

In this paper we consider a broad class of distributionally robust optimization (DRO for short) problems where the probability of the underlying random variables depends on the decision variables and the ambiguity set is defined through parametric moment conditions with generic cone constraints. Under some moderate conditions including Slater type conditions of cone constrained moment system an...

In this paper, the continuous optimal control theory is used to model and solve the maximum entropy problem for a continuous random variable. The maximum entropy principle provides a method to obtain least-biased probability density function (Pdf) estimation. In this paper, to find a closed form solution for the maximum entropy problem with any number of moment constraints, the entropy is consi...

Azeez Muhammad-Lawal Gafar Olawumi Iyiowu Kemi Funmilayo Omotesho

In spite of the development of various improved cultivars of maize, yield in Nigeria has continued to be hampered by the over cropped nature of most farmlands as well as a wide range of pests and diseases. This study therefore carried out an analysis of agro-chemical inputs’ use in maize production among small scale farmers in Iwo Local Government Area of Osun State. Specifically, the study inv...

2003
Pierre Degond Florian Méhats Christian Ringhofer CHRISTIAN RINGHOFER

In this work, we give an overview of recently derived quantum hydrodynamic and diffusion models. A quantum local equilibrium is defined as a minimizer of the quantum entropy subject to local moment constraints (such as given local mass, momentum and energy densities). These equilibria relate the thermodynamic parameters (such as the temperature or chemical potential) to the densities in a non-l...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید