نتایج جستجو برای: current sample
تعداد نتایج: 1148585 فیلتر نتایج به سال:
In Chinese society, traditional Chinese medical clinics are popular and play a significant role in primary healthcare. The current study aimed to examine the mental health of new patients at Chinese medical clinics. A cross-sectional questionnaire survey was conducted. Subjects were new patients of a Chinese medical clinic recruited through 100% consecutive sampling during a 5-week period. A re...
پیش بینی ریسک سهام توسط روش garch(1,1) در این تحقیق فراریت (انحراف معیار استاندارد بازده) که رایج ترین معیار برای سنجش ریسک می باشد، برای بازده سهام (ناشی از تفاوت قیمت سهم در دو زمان متفاوت) توسط روش garch(1,1) یا generalized autoregressive conditionally heteroskedastic با پارامترهای p=1 و q=1 پیش بینی می شود.برای این کار داده های مربوط به قیمت سهام و به دو قسمت تقسیم می شوند: in-sample و out...
the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...
The structural properties of high Tc superconductor by XRD, SEM and EDX, resistivity, critical electrical current density and oxygen content measurement have ben studied. The sample of is prepared by solid state reaction, with two different thermal conditions. The XRD results have shown the formation of pure phase of . The oxygen content measurement for two samples by Iodometric titration giv...
The existing modeling methods using Petri Nets, have been successfully applied to model and analyze dynamic systems. However, these methods are not capable of modeling all dynamic systems such as systems with the current sample time signals, systems including various subsystems and multi-mode systems. This paper proposes Hybrid Time Delay Petri Nets (HTDPN) to solve the problem. In ...
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