نتایج جستجو برای: hazard based models

تعداد نتایج: 3588084  

Journal: :iranian journal of cancer prevention 0
alireza abadi dept. of health and community medicine, school of medicine, shahid beheshti university of medical sciences, tehran, iran parvin yavari dept. of health and community medicine, school of medicine, shahid beheshti university of medical sciences, tehran, iran monireh dehghani dept. of biostatistics, paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran hamid alavi majd dept. of biostatistics, paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran erfan ghasemi shahid beheshti university of medical sciences, tehran, iran. farzaneh amanpour dept. of biostatistics, paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran

background: the aim of this study is to evaluate the association between different treatments and survival time of breast cancer patients using either standard cox model or stratified cox model. methods: the study was conducted on 15830 women diagnosed with breast cancer in british columbia, canada.  they were divided into eight groups according to patients’ ages and stage of disease either cox...

Abdolrasoul Bardideh Amir Hossein Hashemian Behrouz Beiranvand, Eghbal Zand-Karimi Mansour Rezaei

Cox regression model serves as a statistical method for analyzing the survival data, which requires some options such as hazard proportionality. In recent decades, artificial neural network model has been increasingly applied to predict survival data. This research was conducted to compare Cox regression and artificial neural network models in prediction of kidney transplant survival. The prese...

Ali Raoof Mehrpoor Masoud N. Ahari

Recorded ground motions in near fault region have completely distinct nature from others that recorded in far field of the fault. Near source outcomes cause much of the seismic energy to appear in a single large and long period pulse at the beginning of the velocity record. Assaluyeh complex is located near the reverse Assaluyeh fault that is a segment of Mountain Front Fault. This complex cont...

2007
Fali Huang

In a principal–agent framework, principals can mitigate moral hazard problems not only through extrinsic incentives such as monitoring, but also through agents’ intrinsic trustworthiness. Their relative usage, however, changes over time and varies across societies. This paper attempts to explain this phenomenon by endogenizing agent trustworthiness as a response to potential returns. When monit...

Journal: :فیزیک زمین و فضا 0
سید حسن موسوی بفروئی دانشجوی دکتری، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران نوربخش میرزائی دانشیار، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران الهام شعبانی استادیار، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران مرتضی اسکندری قادی دانشیار، دانشکده مهندسی عمران، پردیس دانشکده های فنی، دانشگاه تهران، ایران

growing environmental and social concerns, both on the part of decision makers and public opinion, have brought a new perspective to the perception of hazard assessments a valid alternative in the long-term, and an effective complement in short and medium terms, to traditional design procedure for a resistant and safe environment. results of the gradual development of research on the probabilis...

J. Gerami M.R. Mozaffari

  In this paper, different input-oriented ratio-based DEA (DEA-R-I) models are proposed. By presenting the envelopment-additive-enhanced Russell model based on the DEA-R-I form, each decision making unit is evaluated and its efficiency score is calculated. Also, by presenting the central resource allocation model based on the DEA-R-I form, a suitable benchmark for all DMUs is proposed by solvin...

2014
Angela Noufaily

We consider a novel sub-class of log-location-scale models for survival and reliability data formed by restricting the density of the underlying location-scale distribution to be log-concave. These models display a number of attractive properties. We particularly explore the shapes of the hazard functions of these, LLSLC, models. A relatively elegant, if partial, theory of hazard shape arises u...

Journal: :Journal of economic entomology 2007
Stephen Cook Shane Cherry Karen Humes James Guldin Christopher Williams

The southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Scolytidae), is the most damaging forest insect pest of pines (Pinus spp.) throughout the southeastern United States. Hazard rating schemes have been developed for D. frontalis, but for these schemes to be accurate and effective, they require extensive on-site measurements of stand attributes such as host density, age, and...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

مدلهای گارچ در فضاهای هیلبرت پایان نامه حاضر شامل دو بخش می باشد. در قسمت اول مدلهای اتورگرسیو تعمیم یافته مشروط به ناهمگنی واریانس در فضاهای هیلبرت را معرفی، مفاهیم ریاضی مورد نیاز در تحلیل این مدلها در دامنه زمان را مطرح کرده و آنها را مورد بررسی قرار می دهیم. بر اساس پیشرفتهایی که اخیرا در زمینه تئوری داده های تابعی و آماره های عملگری ایجاد شده است، فرآیندهایی که دارای مقادیر در فضاهای ...

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