نتایج جستجو برای: منحنیهای idf

تعداد نتایج: 3656  

2009
Martin Klein Michael L. Nelson

For bounded datasets such as the TRECWeb Track (WT10g) the computation of term frequency (TF) and inverse document frequency (IDF) is not difficult. However, when the corpus is the entire web, direct IDF calculation is impossible and values must instead be estimated. Most available datasets provide values for term count (TC) meaning the number of times a certain term occurs in the entire corpus...

Journal: :Military medicine 2014
Roy Nadler Sami Gendler Jacob Chen Gadi Lending Amir Abramovitch Elon Glassberg

INTRODUCTION Obtaining vascular access is of paramount importance in trauma care. When peripheral venous access is indicated but cannot be obtained, the intraosseous route represents an alternative. The Bone Injection Gun (BIG) is the device used for intraosseous access by the Israeli Defense Force (IDF). The purpose of this study is to assess the success rate of intraosseous access using this ...

Journal: :The Southeast Asian journal of tropical medicine and public health 2011
Bancha Satirapoj Ouppatham Supasyndh Natee Mayteedol Amnart Chaiprasert Panbuppa Choovichian

The metabolic syndrome has been documented to increase the risk of cardiovascular disease and chronic kidney disease (CKD); however, there are few studies of this in developing countries. A total of 15,357 participants of a standardized check-up, included metabolic screening, were enrolled. Metabolic syndrome was defined using criteria modified from the National Cholesterol Education Program Ad...

2012
MA Kaykhaei M Hashemi B Narouie A Shikhzadeh M Jahantigh E Shirzaei B Rezazehi M Hoseinian S Yousefi S Masoudian A Emamdadi SF Alavi R Mashhadi H Ansari

BACKGROUND The metabolic syndrome (MES) is associated with a high risk of diabetes and cardiovascular disease. The aim of the present study was to determine the prevalence of the metabolic syndrome as well as cut-off points for waist circumference (WC) for diagnosis of MES in Zahedan, southeast Iran. METHODS Totally, 1802 people (735 men and 1067 women) with metabolic syndrome were surveyed a...

2015
Giannis Nikolentzos Polykarpos Meladianos Nektarios Liakis Michalis Vazirgiannis

One of the goals of clinical decision support systems is to provide physicians information about how to best care for their patients. The Clinical Decision Support track organized by TREC, focuses on developing new techniques to retrieve articles from the biomedical literature relevant to the medical records of the patients. Due to the large volume of the existing literature and the diversity i...

2015
Leah Shelef Lucian Laur Eyal Fruchter

Suicide is the third leading cause of death among adolescents in most Western world countries. Similar findings have been reported among adolescents in Israel (including the Israeli army) in times of peace; nonetheless, suicide rate has decreased significantly in recent years. In Israel, IDF service is mandatory and adolescents are obligated to serve by law. Therefore, the IDF is responsible un...

ژورنال: :مجله دیابت و متابولیسم ایران 0
فرزاد حدائق farzad hadaegh endocrine research center, shaheed beheshti university of medical sciences, tehran, iranمرکز تحقیقات غدد و متابولیسم، دانشگاه علوم پزشکی شهید بهشتی آزاده ضابطیان azadeh zabetian endocrine research center, shaheed beheshti university of medical sciences, tehran, iranمرکز تحقیقات غدد و متابولیسم، دانشگاه علوم پزشکی شهید بهشتی فریدون عزیزی fereidoun azizi endocrine research center, shaheed beheshti university of medical sciences, tehran, iranمرکز تحقیقات غدد و متابولیسم، دانشگاه علوم پزشکی شهید بهشتی

سندرم متابولیک توسط تعاریف مختلف بیان شده است. اخیرا در آپریل سال 2005، فدراسیون بین المللی دیابت (idf) تعریف جدیدی از سندرم متابولیک را بر پایه دو تعریف قبلی who و atpiii بیان کرده است. مطالعه حاضر با هدف تعیین شیوع سندرم متابولیک بر اساس این تعاریف و تعیین میزان هم خوانی تعریف idf با معیارهای atpiii و who طراحی شده است. روش ها: مطالعه حاضر یک مطالعه مقطعی است که در آن 10368 مرد و زن بالای 20 ...

Journal: :iranian journal of public health 0
ma kaykhaei m hashemi b narouie a shikhzadeh m jahantigh e shirzaei

background: the metabolic syndrome (mes) is associated with a high risk of diabetes and cardiovascular disease. the aim of the present study was to determine the prevalence of the metabolic syndrome as well as cut-off points for waist circumference (wc) for diagnosis of mes in zahedan, southeast iran. methods: totally, 1802 people (735 men and 1067 women) with metabolic syndrome were surveyed a...

ژورنال: :نشریه حفاظت منابع آب و خاک (علمی - پژوهشی) 2012
علیرضا زمانی نوری

یکی از پارامترهای مهم طراحی سازه های هیدرولیکی، رگبار طرح می باشد که از روی منحنی های شدت- مدت – فراوانی (idf) برای دوام و دوره ی بازگشت معین استخراج می شود. روش های متداول محاسبه ی منحنی های idf علاوه بر طولانی تر بودن، دارای تعداد پارامترهای زیادی می باشند که این خود باعث کاهش اعتماد پذیری این منحنی ها می شود. در روش متداول محاسبه ی منحنی هایidf، باید بارش به ازای دوام های مختلف ثبت شده باشد ...

Journal: :Journal of Documentation 2004
Karen Spärck Jones

Robertson comments on the theoretical status of IDF term weighting. Its history illustrates how ideas develop in a specific research context, in theory/experiment interaction, and in operational practice. It is an honour to have the small proposal for term weighting that I published more than thirty years ago (Sparck Jones 1972) the subject of Stephen Robertson’s paper (Robertson 2004). I would...

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