نتایج جستجو برای: δt under a2 emission scenario at 90 probability percentile
تعداد نتایج: 4781240 فیلتر نتایج به سال:
Observationally, there is a small fraction of gamma-ray bursts (GRBs) with prompt emission observed by Fermi/GBM that are composed two pulses. Occasionally, the distance to GRB may be lensed when high mass astrophysical object resides in path between source and observer. In this paper, we describe 200716C, which has two-pulse duration few seconds. We present Bayesian analysis identifying gravit...
We present the Swift observations of the faint burst GRB 050421. The X-ray light-curve shows at least two flares: the first flare peaking at ∼110 s after the BAT trigger (T0) and the second one peaking at ∼154 s. The first flare presents a flux variation of δF/Fpeak ∼ 3.7 and a short timescale ratio δt/tpeak ∼ 0.07. The second flare is smaller and presents a flux variation of δF/Fpeak ∼ 1.7 and...
the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...
Ahvaz can be regarded as one of the most polluted cities in the world in terms of air pollution. Successive years of drought and weather conditions in recent years have resulted in particulate matter (PM10) concentration in Ahvaz. In this study, using probability distribution techniques, an appropriate threshold to identify the PM10 maximum extreme concentrations (MEC) has been detected. Based ...
Modeling a road accident hazard zoning map to identify high-risk areas is a very effective step to reduce the resulting casualties. Due to the dynamic nature of many of the factors affecting the identification of these areas, traditional zoning mapping does not seem to be effective. In the field of ubiquitous modeling in the framework of the GIS, it is possible to produce a separate map at any ...
چکیده کنه تارتن دو لکه ای tetranychus urticae koch یکی از چندخوارترین آفات شناخته شده محصولات کشاورزی دنیا به حساب می آید. در این بررسی جمعیت تخم و مراحل فعال این کنه در شرایط آلودگی طبیعی و مصنوعی در برگ های 8 رقم لوبیا در سال 1392 در گلخانه و مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه ارومیه موردمطالعه قرار گرفت. آزمایش به صورت طرح کاملاً تصادفی برای شرایط مزرعه در10 تکرار و برای شرایط گلخانه ای...
Minimizing the outage probability and maximizing throughput are two important aspects in device to device (D2D) communications, which are greatly related to each other. In this paper, first, the exact formulas of the outage probability for D2D communications underlaying or overlaying cellular network are derived which jointly experience Additive White Gaussian Noise (AWGN) and Rayleigh multipat...
This study investigates the effects of reductions in nitrogen oxide (NOx) emissions from major point sources on daily maximum 8-h ozone concentrations in the eastern United States. The Community Multiscale Air Quality (CMAQ) model was utilized in photochemical simulations on a matrix of modeling scenarios permitting an examination of the separate effects of emission changes and meteorological i...
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