نتایج جستجو برای: renewal rate
تعداد نتایج: 976816 فیلتر نتایج به سال:
Delayed renewal process and delayed renewal reward process are introduced in the framework of uncertainty theory and their uncertainty distributions are provided. Furthermore, delayed renewal theorem on the limit value of the expected renewal rate of the process and delayed renewal reward theorem on the limit value of the long-run expected reward per unit time are presented. At last, some examp...
Purpose: The aim is to downregulate the expression level of NS as an important factor in sustaining stem cells and certain types of cancer cells self-renewal ability in bone marrow derived mesenchymal stem cells by RNAi strategy and investigate the effects of absence of NS in these cells. Materials and Methods: Double strand NS-specific and control siRNA oligos were designed and transfected in...
this study was aimed to assess the causes of the structural decline in the renewal rate of apristine oak forest close to rome (central italy) by analyzing long-term measurements of the water budget in open and fenced areas. despite dry climate conditions in the area, long-term soil moisture measurements at 100 cm soil depth indicated that an enough large amount of water is available to oaks dur...
CONTEXT Little is known about how state-level driver licensure laws, such as in-person renewal, vision tests, road tests, and the frequency of license renewal relate to the older driver traffic fatality rate. OBJECTIVE To determine whether state driver's license renewal policies are associated with the fatality rate among elderly drivers. DESIGN, SETTING, AND POPULATION Retrospective, longi...
Recently, Zhao et al. [Fuzzy Optimization and Decision Making (2007) 6, 279-295] characterized the interarrival times as fuzzy random variables and presented a fuzzy random elementary renewal theorem on the limit value of the expected renewal rate of the process in the fuzzy random renewal process. They also depicted both the interarrival times and rewards are depicted as fuzzy random variables...
Uncertain process is a sequence of uncertain variables indexed by time. This paper aims to introduce a kind of uncertain process named uncertain delayed renewal reward process whose interarrival times and rewards (or costs) are regarded as uncertain variables with the first interarrival ( i.e., renewal) time and reward different from the others, respectively. The main results include the uncert...
In this work we provide sufficient conditions under which a general counting process stopped at a random time independent from the process belongs to the reliability decreasing reversed hazard rate (DRHR) or increasing failure rate (IFR) class. We also give some applications of these results in generalized renewal and trend renewal processes stopped at a random time.
Deteriorated urban textures are areas of a city isolated from developmental life cycle. They have turned into the focus of problems and inefficiencies. The evaluation of renewal actions claims to promote residents’ satisfaction in some cases. At the same time of improving objective and economic quality of life, there are claims regarding the lack of any improvements in their subjective quality ...
Two mechanisms for firing rate regulation were identified in dopaminergic nigrostriatal cells (DA cells), one of a renewal nature which prevents short and long interspike intervals (ISIs) and the other of a no-renewal nature which compensates long ISIs with short ISIs and vice versa. Renewal regulation was found in 96% of DA cells and less frequently in nigrocollicular (63%), nigrothalamic (61%...
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