نتایج جستجو برای: information entropy.

تعداد نتایج: 1203337  

Journal: :تحقیقات کتابداری و اطلاع رسانی دانشگاهی 0
دکتر نرگس نشاط

evaluation criteria for different versions of the same database the concept of information, during its development, is connected to the concept of entropy created by the 19th century termodynamics scholars. information means, in this view point, order or negentropy. on the other hand, entropy is connected to the concepts as chaos and noise, which cause, in turn, disorder. in the present paper, ...

Journal: :فلسفه و کلام 0

the second law of thermodynamic (entropy principle) is of special theo-philosophical importance. it seems that this law, which is renowned as “the death of software design” and despite the order in the world, is like an incompatible universal. this article examines the concept of entropy in the three temperature, statistic, and information applications and addresses the contradiction of the sec...

The purpose of this study is to define the concepts of Tsallis entropy and conditional Tsallis entropy of fuzzy partitions and to obtain some results concerning this kind entropy. We show that the Tsallis entropy of fuzzy partitions has the subadditivity and concavity properties. We study this information measure under the refinement and zero mode subset relations. We check the chain rules for ...

Journal: :Turkiye Klinikleri Journal of Biostatistics 2020

Journal: :رادار 0
سارا قدس وهاب شجاع الدینی یاسر مقصودی

the polarimetric entropy and the alpha angle are two important parameters for analyzing polarimetric synthetic aperture radar data. they demonstrate the degree of randomness in the polarization of the received signal and scattering mechanism of scatterers respectively. recently, there has been an increasing interest in compact polarimetry due to its advantages in comparison with full polarimetr...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم ریاضی و مهندسی کامپیوتر 1387

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پایه 1391

bekenstein and hawking by introducing temperature and every black hole has entropy and using the first law of thermodynamic for black holes showed that this entropy changes with the event horizon surface. bekenstein and hawking entropy equation is valid for the black holes obeying einstein general relativity theory. however, from one side einstein relativity in some cases fails to explain expe...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم ریاضی و مهندسی کامپیوتر 1386

چکیده ندارد.

Journal: :پژوهشنامه کتابداری و اطلاع رسانی 0
اعظم بیگ لو محمدرضا داورپناه

purpose: this study aimed to measure the information load of words in farsi scientific texts and determine the relationship between some properties of the words and information load of the texts based on shannon entropy. methodology: the study was conducted based on the content analysis of a number of 320 articles that were published in scientific-research iranian journals in 2009. and the arti...

Journal: :محیط شناسی 0
محسن رضایی دکترای هیدروژئولوژی، دانشکده علوم زمین، دانشگاه خوارزمی وهاب امیری دانشجوی دکترای هیدروژئولوژی، دانشکده علوم زمین، دانشگاه خوارزمی

introduction the chemical characteristic of groundwater as a major source of water supply for human life is an important factor in determining the usage of it for agriculture, industry and drinking. useful techniques and different methods of studying the chemical composition of groundwater such as correlation coefficient, descriptive statistics, factor analysis and cluster analysis provide an u...

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