نتایج جستجو برای: similarity measures

تعداد نتایج: 454580  

2004
Godfried T. Toussaint

Traditionally, rhythmic similarity measures are compared according to how well rhythms may be recognized with them, how efficiently they can be retrieved from a data base, or how well they model human perception and cognition. In contrast, here similarity measures are compared on the basis of how much insight they provide about the structural inter-relationships that exist within families of rh...

2007
Xiang Guo

Quantitative measure of functional similarity between gene products is important for post-genomics study. The similarity measures may be used to validate high-throughput protein interaction data, help the development of new pathway modelling tools and clustering methods, and enable the identification of functionally related gene products independent of homology [Guo et al., 2006, Schlicker et a...

2007
Donald Metzler Susan T. Dumais Christopher Meek

Measuring the similarity between documents and queries has been extensively studied in information retrieval. However, there are a growing number of tasks that require computing the similarity between two very short segments of text. These tasks include query reformulation, sponsored search, and image retrieval. Standard text similarity measures perform poorly on such tasks because of data spar...

2014
Chunqiao Tan Xiaohong Chen

Although many measures of similarity between intuitionistic fuzzy set (IFS) have been proposed in the literature, some existing similarity measures are not always effective in some cases. A main reason is that existing similarity measures have not or little considered degree of hesitancy in intuitionistic fuzzy set. In this paper, based on this foundation that the degree of hesitancy in intuiti...

Journal: :iranian journal of science and technology (sciences) 2006
a. r. soleimani

scott and szewczyk in technometrics, 2001, have introduced a similarity measure for twodensities f1 and f2 , by1, 21 21 1 2 2( , ), ,f fsim f ff f f f< >=< >< >wheref1, f2 f1(x, θ1)f2(x, θ2)dx.+∞−∞< >=∫sim(f1, f2) has some appropriate properties that can be suitable measures for the similarity of f1 and f2 .however, due to some restrictions on the value of parameters and the kind of densities, ...

Detection of fake accounts on social networks is a challenging process. The previous methods in identification of fake accounts have not considered the strength of the users’ communications, hence reducing their efficiency. In this work, we are going to present a detection method based on the users’ similarities considering the network communications of the users. In the first step, similarity ...

2011
Wen-tau Yih Kristina Toutanova John C. Platt Christopher Meek

Traditional text similarity measures consider each term similar only to itself and do not model semantic relatedness of terms. We propose a novel discriminative training method that projects the raw term vectors into a common, low-dimensional vector space. Our approach operates by finding the optimal matrix to minimize the loss of the pre-selected similarity function (e.g., cosine) of the proje...

2007
Jin-Han Park Jong-Seo Park Young Chel Kwun Ki Moon Lim

An intuitionistic fuzzy set (IFS), an extended version of a fuzzy set, is more applicable for representing vague information since it provides a way to control a degree of hesitation. One of most prominent research directions on the theory of IFSs is measurement of similarity between IFSs. Even several similarity measures have been proposed, some unreasonable cases can be made by such measures....

2008
Palakorn Achananuparp Xiaohua Hu Xiajiong Shen

The ability to accurately judge the similarity between natural language sentences is critical to the performance of several applications such as text mining, question answering, and text summarization. Given two sentences, an effective similarity measure should be able to determine whether the sentences are semantically equivalent or not, taking into account the variability of natural language ...

2002
Michail Vlachos Dimitrios Gunopulos George Kollios

We investigate techniques for similarity analysis of spatio-temporal trajectories for mobile objects. Such kind of data may contain a great amount of outliers, which degrades the performance of Euclidean and Time Warping Distance. Therefore, here we propose the use of non-metric distance functions based on the Longest Common Subsequence (LCSS), in conjunction with a sigmoidal matching function....

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