نتایج جستجو برای: sis
تعداد نتایج: 4735 فیلتر نتایج به سال:
In this paper, The impulsive delay epidemic SIS model is considered. By using the continuation theory for k-set contractions, the sufficient conditions of the existence of positive ω−periodic solutions of the impulsive delay SIS model are obtained.
Mapping the spatial distribution of soil pollutants is essential for delineating contaminated areas. Currently, geostatistical interpolation, kriging, is increasingly used to estimate pollutant concentrations in soils. The kriging-based approach, indicator kriging (IK), may be used to model the uncertainty of mapping. However, a smoothing effect is usually produced when using kriging in polluta...
BACKGROUND Age-adjusted coronary artery disease (CAD) burden identified on coronary computed tomography angiography predicts major adverse cardiovascular event (MACE) risk; however, it seldom contributes to clinical decision making because of a lack of nomographic data. We aimed to develop clinically pragmatic age- and sex-specific nomograms of CAD burden using coronary computed tomography angi...
در این رساله ابتدا مدل های sis و sir با فرآیند های تعیّنی و تصادفی معرفی می شوند. پس از آن مروری بر دو مدل شاخه ای برای بررسی بیماری خواهیم داشت. سپس با معرفی مدل پخش و برهم کنش، انتشار بیماری را روی شبکه ی یک بعدی برای مدل sirs مورد مطالعه قرار می دهیم.
Grounded in SDT, several studies have highlighted the role of teachers’ motivating and demotivating styles for students’ motivation, learning, physical activity education (PE). However, most these focused on a restricted number strategies (e.g., offering choice) or dimensions autonomy support). Recently, researchers developed Situations-in-School (i.e., SIS-Education) questionnaire, which allow...
Statistical Model Checking (SMC) is a technique, based on Monte-Carlo simulations, for computing the bounded probability that a specific event occurs during a stochastic system’s execution. Estimating the probability of a “rare” event accurately with SMC requires many simulations. To this end, Importance Sampling (IS) is used to reduce the simulation effort. Commonly, IS involves “tilting” the ...
The purpose of this study was to investigate the feasibility of coculturing meniscus cells (MCs) and synovium-derived stem cells (SDSCs) on small intestine submucosa (SIS) to establish an innovative method to engineer in vitro meniscus constructs. About 0.9 million cells (MCs, prelabeled SDSCs [with Vybrant DiI], and a coculture of MCs and prelabeled SDSCs [50:50]) were mixed with fibrin gel an...
We present a low noise SIS mixer developed for the 1.2 THz band of the heterodyne spectrometer of the Herschel Space Observatory. The device of this design will be among the first SIS mixers flown in space at Herschel. The developed SIS mixer has a quasi-optical design, with a double slot planar antenna and an extended spherical lens made of pure Si. The SIS junctions are Nb/AlN/NbTiN with the ...
OBJECTIVE To compare the diagnostic performance of saline infusion sonohysterography (SIS), transvaginal ultrasound (TVS), and diagnostic hysteroscopy (DH) in the detection of endometrial lesions in symptomatic women. DESIGN Prospective, comparative study. SETTING Obstetrics and Gynecology Department of a tertiary academic hospital. PATIENT(S) A total of 105 consecutive women presenting i...
Abstract Silicon sulfide (SiS 2 ) was synthesized from Si, SiC, Si 3 N 4 , and a eutectic Al-Si liquid. An Ar-CS gas mixture, after bubbling through liquid CS passed over pulverized or alloy White, needle-shaped SiS precipitated as single phase on the colder downstream surface when powder in SiO liner heated 1273 K. This deposition mechanism involves reaction between to form with vaporization o...
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