نتایج جستجو برای: stochastic deterioration
تعداد نتایج: 158324 فیلتر نتایج به سال:
Twenty-two patients underwent cardiac catheterization before and an average of five months after aorto-coronary bypass operation (ACBO). Two groups were examined: 10 patients with all grafts patent, and 12 patients with one or more grafts occluded. All patients improved symptomatically, regardless of graft patency. However, in the occluded group, left ventricular enddiastolic pressure (LVEDP) i...
Performance evaluation of universities is an important issue between researchers. Classic data envelopment analysis (DEA) models with deterministic data have been used by many authors to measure efficiency of universities in different countries. However, DEA with stochastic data are, rarely used to measure efficiency of universities. In this paper, input oriented model in stochastic data env...
A methodology for reliability analysis of reinforced concrete (RC) beams strengthened with ultra high-performance fibre (UHPFRC) tensile layers is presented. The proposed includes stochastic stress-block a section, assuming perfect bond between the RC beam and UHPFRC layer. Annual before after strengthening operation conducted. Deterioration induced by chloride corrosion incorporated into via m...
self-centering pier (scp) has been viewed as a remarkable accomplishment which is able to sustain major lateral loading with reduced structure damage in seismic engineering. stiffness deterioration observed in experiment is vital for the seismic performance of self-centering concrete pier. in this contribution, the associated stiffness deterioration with respect to the structural damage is mode...
in this paper, a production inventory model is developed for the business enterprise which consists of three wings. the first wing is for manufacturing new items, the second wing is for collecting the returned items, while third wing is for remanufacturing the returned item. in this model we consider the fact that the storage item is deteriorated during storage periods and salvage value is inco...
conclusions male gender, history of hypertension, high nyha score, and the presence of cad predict lvef deterioration in patients with lbbb. objectives the present study aimed to identify underlying factors that predict left ventricular ejection fraction (lvef) deterioration in patients suffered from complete lbbb. patients and methods in a retrospective case-control study, the data of 220 cons...
emission trading is one of the famous mechanisms under kyoto protocol to control environmental pollution. the aim of this paper is to design a strategic supply chain network under emission trading scheme with inclusion of stochastic parameters and budget limitation. demand and price of carbon credits are considered as the important stochastic parameters influencing the supply chain network. in ...
critical, because true progressors require a change in treatment, but pseudoprogressors should continue with adjuvant temozolomide. Currently, there are no definitive radiologic criteria to differentiate between true progression and pseudoprogression. The response criteria for brain tumours developed by the Response Assessment in Neuro-Oncology Working Group state that apparent radiologic progr...
This work proposes a load allocation decision strategy based on deterioration prognostics information for multi-stack fuel cell systems. The is characterized by the overall resistance value, as it carries key aging of cell. dynamics then modeled an increasing stochastic process whose trend function output power. Combining system and consumption, multi-objective optimization (MOO) decision-makin...
semilinear stochastic evolution equations with multiplicative l'evy noise are considered. the drift term is assumed to be monotone nonlinear and with linear growth. unlike other similar works, we do not impose coercivity conditions on coefficients. we establish the continuous dependence of the mild solution with respect to initial conditions and also on coefficients. as corollarie...
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