نتایج جستجو برای: maxent model

تعداد نتایج: 2104952  

2017
Narkis S. Morales Ignacio C. Fernández Victoria Baca-González

Environmental niche modeling (ENM) is commonly used to develop probabilistic maps of species distribution. Among available ENM techniques, MaxEnt has become one of the most popular tools for modeling species distribution, with hundreds of peer-reviewed articles published each year. MaxEnt's popularity is mainly due to the use of a graphical interface and automatic parameter configuration capabi...

2015
Corinna Cortes Vitaly Kuznetsov Mehryar Mohri Umar Syed

We present a new class of density estimation models, Structural Maxent models, with feature functions selected from a union of possibly very complex sub-families and yet benefiting from strong learning guarantees. The design of our models is based on a new principle supported by uniform convergence bounds and taking into consideration the complexity of the different sub-families composing the f...

2000
Peter Grünwald

We give an interpretation of the Maxi­ mum Entropy (MaxEnt) Principle in game­ theoretic terms. Based on this interpretation, we make a formal distinction between differ­ ent ways of applying Maximum Entropy dis­ tributions. MaxEnt has frequently been crit­ icized on the grounds that it leads to highly representation dependent results. Our dis­ tinction allows us to avoid this problem in many c...

Journal: :The European Physical Journal B 2012

2018
Rulin Wang Qing Li Shisong He Yuan Liu Mingtian Wang Gan Jiang

OBJECTIVE Bacterial canker of kiwifruit caused by Pseudomonas syringae pv. actinidiae (Psa) is a major threat to the kiwifruit industry throughout the world and accounts for substantial economic losses in China. The aim of the present study was to test and explore the possibility of using MaxEnt (maximum entropy models) to predict and analyze the future large-scale distribution of Psa in China....

ژورنال: :محیط زیست جانوری 0
امیر انصاری دانشگاه اراک: دانشکده کشاورزی و منابع طبیعی ، گروه محیط زیست، کد پستی 8349- 8- 38156

استان مرکزی با دارا بودن کوه های مرتفع زیستگاه مطلوب گوسفند وحشی است، به طوری که جمعیت های قابل توجهی از گوسفند وحشی در زیستگاه های استان مرکزی مشاهده می گردد. maxent براساس حداکثر آنتروپی یا نزدیک به واقعیت و enfa براساس توزیع نرمال می باشد. با استفاده از روش های تحلیل عامل آشیان بوم شناختی، حداکثر آنتروپی نقشه و مدل مطلوبیت زیستگاه گوسفند وحشی تهیه و با یکدیگر مقایسه گردید. نتایج مطالعه نشان ...

2011
Simon J. Pittman Kerry A. Brown

Two of the major limitations to effective management of coral reef ecosystems are a lack of information on the spatial distribution of marine species and a paucity of data on the interacting environmental variables that drive distributional patterns. Advances in marine remote sensing, together with the novel integration of landscape ecology and advanced niche modelling techniques provide an unp...

2005
Nicholas Armstrong Annette Dowd James P. Cline Walter Kalceff

A Bayesian/Maximum entropy (MaxEnt) method is applied to quantify the broadening of Xray line profiles in terms of the nanocrystallite size effects in ceria. The analysis is in general agreement with transmission electron microscopy results, while demonstrating the importance of appropriate a priori information needed in the method. The analysis also identifies other microstructural effects, su...

2011
Yeon-Jun Kim Marc C. Beutnagel

This paper introduces a method to assess lexical stress patterns in American English words automatically using machine learning algorithms, which could be used on the computer assisted language learning (CALL) system. We aim to model human production concerning lexical stress patterns by training stress patterns in a native speaker’s utterances and making use of it to detect erroneous stress pa...

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