نتایج جستجو برای: importance
تعداد نتایج: 391858 فیلتر نتایج به سال:
In this paper, we first provide a new theoretical understanding of the Evidence Pre-propagated Importance Sampling algorithm (EPIS-BN) (Yuan & Druzdzel 2003; 2006b) and show that its importance function minimizes the KL-divergence between the function itself and the exact posterior probability distribution in Polytrees. We then generalize the method to deal with inference in general hybrid Baye...
In this paper we introduce a new dynamic importance sampling propagation algorithm for Bayesian networks. Importance sampling is based on using an auxiliary sampling distribution from which a set of configurations of the variables in the network is drawn, and the performance of the algorithm depends on the variance of the weights associated with the simulated configurations. The basic idea of d...
A key parameter in population genetics is the scaled mutation rate θ = 4Nμ, where N is the effective haploid population size and μ is the mutation rate per haplotype per generation. While exact likelihood inference is notoriously difficult in population genetics, we propose a novel approach to compute a first order accurate likelihood of θ that is based on dynamic programming under the infinite...
Dental disease is the number one clinical problem in small animal practices,[1] And thus oral pathology is exceedingly common in small animal patients. In addition, there is a very wide variety of pathologies that are encountered within the oral cavity. These conditions often cause significant pain and/or localised, regional and systemic infection.[2]</sup...
ارزیابی نسج کبد که از طریق نمونه برداری از این عضو امکانپذیر می شود، اساس ارزیابی و مدیریت بسیاری از بیماری های کبدی می باشد. در حال حاضر با وجود تست های حساس و در دسترس جهت تشخیص بیماری های کبدی، همچنان بیوپسی کبد به عنوان یکی از اساسی ترین ابزار تشخیص دهنده و درمانی بیماری های کبد، به خصوص بیماری های مزمن کبدی محسوب می شود. در واقع بیوپسی کبد همواره به عنوان یک آزمون مکمل آزمون های دیگر به شم...
This essay focuses on metadiscourse, a name for elements of texts that convey meanings other than those that are primarily referential. The essay provides some theoretical background to the study of metadiscourse, briefly reviews a taxonomy of metadiscourse, and explores four reasons why the study of metadiscourse is interesting and important: (a) Such study shows how ...
today, journals are trying to improve their rankings both at local and international scales. achievement of the journal relies heavily on our ability to publish articles in scientific journals with the highest quality. in this regard, high quality manuscript review plays an important role in supporting editors-in-chief an d executive s to choose the most relevant papers and also helping authors...
the application of e-learning systems - as one of the solutions to the issue of anywhere and anytime learning – is increasingly spreading in the area of education. content management - one of the most important parts of any e-learning system- is in the concern of tutors and teachers through which they can obtain means and paths to achieve the goals of the course and learning objectives. e-learn...
as far as bandura’s (1977) conceptualization of the sense of self-efficacy is concerned, it is argued to be context- and even task-specific, compared to other concepts like self-esteem (brown, 2000); therefore, upon the previous research studies, related theories and definitions, and the ideas and views obtained from the interviews conducted with the scholars, the current research study aimed a...
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