نتایج جستجو برای: مدل مکسنت maxent

تعداد نتایج: 121331  

2009
Sarah Eisenstat Mark Johnson

It has been shown previously that a Maximum Entropy model can be used to learn the correct weights on linguistic constraints in the supervised case [4]. In this paper, we show how to extend the existing work to learn underlying forms in addition to linguistic constraints, discussing the practical details of the priors and the constraint sets that allow this to work. In addition, we discuss a te...

2015

The following picture shows the test omission rate and predicted area as a function of the cumulative threshold, averaged over the replicate runs. The omission rate should be close to the predicted omission, because of the definition of the cumulative threshold. The next picture is the receiver operating characteristic (ROC) curve for the same data, again averaged over the replicate runs. Note ...

2014
Ren-Yan Duan Xiao-Quan Kong Min-Yi Huang Wei-Yi Fan Zhi-Gao Wang

BACKGROUND Predicting species' potential geographical range by species distribution models (SDMs) is central to understand their ecological requirements. However, the effects of using different modeling techniques need further investigation. In order to improve the prediction effect, we need to assess the predictive performance and stability of different SDMs. METHODOLOGY We collected the dis...

1999
David Drabold Gerald Jones

The principle of maximum entropy has recently been applied to several problems of condensed matter theory. In this paper we discuss some technical aspects of the maxent approach to these problems, and show some general properties of the applications of the method. In particular, we show that maxent can be thought of as a convenient way to close hierarchies, and to extrapolate perturbation serie...

2017
Fadi Biadsy Mohammadreza Ghodsi Diamantino Caseiro

Maximum Entropy (MaxEnt) language models are powerful models that can incorporate linguistic and non-linguistic contextual signals in a unified framework with a convex loss. MaxEnt models also have the advantage of scaling to large model and training data sizes We present the following two contributions to MaxEnt training: (1) By leveraging smaller amounts of transcribed data, we demonstrate th...

2015
De-An Huang Amir-massoud Farahmand Kris M. Kitani J. Andrew Bagnell

Maximum entropy inverse optimal control (MaxEnt IOC) is an effective means of discovering the underlying cost function of demonstrated human activity and can be used to predict human behavior over low-dimensional state spaces (i.e., forecasting of 2D trajectories). To enable inference in very large state spaces, we introduce an approximate MaxEnt IOC procedure to address the fundamental computa...

ژورنال: محیط زیست طبیعی 2017

چکیده آهوی ایرانی(Gazella subgutturosa)، با وضعیت حفاظتی آسیب پذیرVU ،گونه ای از گاوسانان ساکن مناطق دشتی و استپی ایران است که جمعیت آن در دهه های اخیر کاهش چشمگیری یافته است. منطقه حفاظت شده هفتادقله ازجمله زیستگاه‌های این گونه در گذشته محسوب می‌شده که در حال حاضر در داخل منطقه منقرض شده است. به منظور معرفی مجدد این گونه به منطقه حفاظت شده هفتادقله آگاهی از زیستگاه های مطلوب در سطح منطقه ضروری...

2013
Steve Pressé Kingshuk Ghosh Julian Lee Ken A. Dill

The variational principles called maximum entropy (MaxEnt) and maximum caliber (MaxCal) are reviewed. MaxEnt originated in the statistical physics of Boltzmann and Gibbs, as a theoretical tool for predicting the equilibrium states of thermal systems. Later, entropy maximization was also applied to matters of information, signal transmission, and image reconstruction. Recently, since the work of...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده منابع طبیعی صومعه سرا 1394

نرم افزار مکسنت یکی از مدللترین و پرکاربردترین نرم افزارها برای بررسی مطلوبیت زیستگاه است.شمال شرق و مرکز پارک ملی بمو مطلوبتین زیستگاه قوچ و میش دراین پارک است.جادهها نوعی تغییر کاربری زیستگاه به صورت خطی هستند که باعث از هم گسیختگی زیستگاه میشود.

Journal: :Physica A: Statistical Mechanics and its Applications 2015

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