نتایج جستجو برای: phase type distribution
تعداد نتایج: 2398281 فیلتر نتایج به سال:
Background and Objectives: In this study, contribution of exhaust emission and CO distribution was estimated in enclosed residential complex parking. Materials and Methods: This was a descriptive - analytical study consisted of two stages. In the first stage, the emission contribution of vehicles was determined. In order to determine the contribution of exhaust gas emissions, through gas spe...
Background and purpose: Diabetes is a multifactorial disease in which genetic factors, environmental and immunological factors are involved in its pathogenesis. Due to the immunological role of blood groups, this study aimed to evaluate the distribution of ABO blood groups and Rh types in patients with type 2 diabetes in north of Iran. Materials and methods: This cross-sectional study was pe...
We consider a system consisting of a server alternating between two service points. At both service points there is an infinite queue of customers that have to undergo a preparation phase before being served. We are interested in the waiting time of the server. The waiting time of the server satisfies an equation very similar to Lindley’s equation for the waiting time in the GI/G/1 queue. We wi...
Studies on the theoreis of immunity against experimental typhoid have so far been almost confined to the infection with smooth type organisms. I have reported in the preceding repor(1) that the variation of mutabile type can be originated from rough phase of Salmonellae, and in this variation, the changes in virulence are identical with those in the variation of mutabile type originated from S ...
Two continuous-wave (cw) single mode diode-lasers (Toshiba TOLD 9150 and Sharp LT024MDO) are applied as pump and signal sources to obtain difference-frequency generation (DFG) in the mid-infrared (MIR) region by using an AgGaS2 crystal with a length of 30 mm for 90° type I phase-matching. Tuneable MIR laser radiation around 5 µm is obtained with an output power in the order of hundred nW while...
A multi-server queueing system with two types of customers and an infinite buffer operating in a random environment as a model of a contact center is investigated. The arrival flow of customers is described by a marked Markovian arrival process. Type 1 customers have a non-preemptive priority over type 2 customers and can leave the buffer due to a lack of service. The service times of different...
Coxian phase-type distributions are a special type of Markov model that can be used to represent survival times in terms of phases through which an individual may progress until they eventually leave the system completely. Previous research has considered the Coxian phase-type distribution to be ideal in representing patient survival in hospital. However, problems exist in fitting the distribut...
compared to conventional chlorination methods which apply chlorine at water treatment plant, booster chlorination has almost solved the problems of high dosages of chlorine residuals near water sources and lack of chlorine residuals in the remote points of a water distribution system (wds). however, control of trihalomethane (thm) formation as a potentially carcinogenic disinfection by-product ...
Implementation of a twin-field quantum key distribution network faces limitations, including the low tolerance interference errors for phase-matching-type protocols and strict constraint regarding intensity probability sending-or-not-sending-type protocols. Here we propose two-photon protocol achieve twin-field-type through postmatching phase-correlated single-photon events. We exploit noninter...
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