نتایج جستجو برای: maxent modeling

تعداد نتایج: 390576  

Journal: :CoRR 2014
Alexander L. Fradkov Dmitry S. Shalymov

The asymptotic convergence of probability density function (pdf) and convergence of differential entropy are examined for the non-stationary processes that follow the maximum entropy principle (MaxEnt) and maximum entropy production principle (MEPP). Asymptotic convergence of pdf provides new justification of MEPP while convergence of differential entropy is important in asymptotic analysis of ...

2017
Songsak Sriboonchitta Vladik Kreinovich

In many practical situations, the Maximum Entropy (MaxEnt) approach leads to reasonable distributions. However, in an important case when all we know is that the value of a random variable is somewhere within the interval, this approach leads to a uniform distribution on this interval – while our intuition says that we should have a distribution whose probability density tends to 0 when we appr...

2011
Wencheng Lv Zhihong Li Xingxia Wu Wenlong Ni Weiwei Qv

Lobesia botrana (Denis & Schiffermüller, 1775) (Lepidoptera: Tortricidae) is one of the most destructive pests of grape in the Palearctic region. The potential geographical distribution of this pest is important to agriculture security. In this study, Maxent and ArcGIS were used to project the potential geographical distribution of L. botrana in China under the current climate. The result indic...

2008
Changchun Bao Weiqun Xu Yonghong Yan

Named Entity Recognition (NER) is an important task in information extraction, where major attention has been paid to written texts of a news or academic paper (esp. biomedical) style. In this paper we report the first piece of work on NER in spoken Chinese dialogues, as a preliminary step for spoken language understanding. The NER task is taken as a sequential classification problem and solved...

2005
Ruhi Sarikaya Hong-Kwang Jeff Kuo Yuqing Gao

This paper presents an unsupervised method that uses limited amount of labeled data and a large pool of unlabeled data to improve natural language call routing performance. The method uses multiple classifiers to select a subset of the unlabeled data to augment limited labeled data. We evaluated four widely used text classification algorithms; Naive Bayes Classification (NBC), Support Vector ma...

2006
Deyi Xiong Qun Liu Shouxun Lin

We propose a novel reordering model for phrase-based statistical machine translation (SMT) that uses a maximum entropy (MaxEnt) model to predicate reorderings of neighbor blocks (phrase pairs). The model provides content-dependent, hierarchical phrasal reordering with generalization based on features automatically learned from a real-world bitext. We present an algorithm to extract all reorderi...

Journal: :Forests 2023

The accurate habitat suitability evaluation of forest species is vital for resource management and conservation. Therefore, the previously published thresholds soil organic carbon (SOC) contents six main were used to screen sample points in this study; maximum entropy modeling (MaxEnt) was applied predict potential distribution those Lvliang Mountain, Shanxi Province, China. following results d...

ژورنال: :پژوهش های جانوری 0
محبوبه سادات حسین زاده دانشگاه فردوسی مشهد منصور علی آبادیان دانشگاه فردوسی مشهد- دانشکده علوم پایه اسکندر رستگارپویانی دانشگاه حکیم سبزواری-دانشکده علوم پایه

در حال حاضر، فعالیت های انسانی مانند اکتشاف، مهاجرت، تجارت و گردشگری بشدت دامنه و الگوی پراکنش برخی گونه ها را تغییر داده است.. در این مطالعه الگوهای پراکنش کنونی و آینده (سال 2040) جکوی خانگی شکم زرد و 19 متغیر زیست اقلیمی تأثیرگذار بر پراکنش این گونه به عنوان گونه ای که محدوده پراکنش آن متاثر از فعالیت های انسانی است مورد بررسی قرار گرفته است. مدل سازی پراکنش گونه بر اساس 40 نقطه حضور و هفت م...

Journal: :Forests 2023

Castanopsis carlesii (Hemsl.) Hayata. 1917 is an established subtropical evergreen broad-leaved tree species with rapid growth rates and a strong plasticity to environmental changes. It widely distributed in East Asia; however, it unclear how climate change influences the distribution of this species. Based on 210 valid occurrence records 10 variables, we used maximum entropy model (Maxent) pre...

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