نتایج جستجو برای: gri
تعداد نتایج: 872 فیلتر نتایج به سال:
For a finite abelian group G with exp(G) = n, the arithmetical invariant smn(G) is defined to be the least integer k such that any sequence S with length k of elements in G has a zero-sum subsequence of length mn. When m = 1, it is the Erdős-Ginzburg-Ziv constant and is denoted by s(G). There are weighted versions of these constants. Here, to obtain bounds on some particular constants of these ...
چکیده خشکسالی یکی از پدیده های جوی است که بخشهای مختلف محیطی را در طول دوره ی حاکمیت تحت تأثیر قرار می دهد. یکی از بخشهای متأثر شده از شرایط بلند مدت منابع آبهای زیرزمینی است که کمتر از سایر بخش ها مورد توجه قرار گرفته است. در این تحقیق به بررسی خشکسالی بر منابع آبهای زیرزمینی با استفاده از شاخص spi و شاخص منابع آب زیرزمینی(gri) بر اساس داده های بارش سالانه و عمق سطح ایستابی از سال آبی(1389-13...
هدف از این پژوهش بررسی نوسانات عمق آب زیرزمینی تحت تاثیر خشکسالی هواشناسی در آبخوان کمیجان است. بدین منظور با دریافت اطلاعات 32 چاه پیزومتری و سه ایستگاه هواشناسی کمیجان، قهاوند و خنداب واقع در محدوده آبخوان، اثر خشکسالی هواشناسی از طریق شاخصهای خشکسالی بارش استاندارد شده (SPI)، درصد نرمال (PNI) و دهکها (DI) بر شاخص آبهای زیرزمینی (GRI) مطالعه شد. بررسیها براساس آزمون همبستگی پیرسون در مقیا...
Sustainability reporting continues to become more widespread, despite ambiguities underlying the concept that may lead to varied interpretations and wider scope for “managing public perceptions” (e.g., Cho et al., 2010; Neu et al., 1998). An examination of the current form it takes using the GRI suggests a trade-off between principles and rules, with reduced emphasis on normative principles and...
Organizations’ activities impact on environment, economy and society. The recognition of business effects is the basis of the Corporate Social Responsibility (CSR). Nevertheless, not all social responsibility issues have the same relevance for every organization. The evaluation of CSR performance depends on those dimensions and stakeholders that are really affected by company activities. Moreov...
This paper utilizes the Korea Innovation Survey data to find out the determinants of industry-university and industry-GRI (IUG) cooperation and its impact on firm performance. We find first that among determinants of IUG cooperation, traditional firm characteristics variables of sizes and R&D intensity are not significant at all, while the participation at the national R&D project turns out be ...
We consider a monotone multistate system with conditionally independent compo nents given the component reliabilities and random component reliabilities Upper and lower bounds are derived for the moments of the random reliability function extending results for binary systems The second moment of the reliability function is given spe cial attention as this quantity is used to calculate the stand...
Advances in computational power, statistical methodology, and population genetics theory have recently had an impact on the way in which information is extracted from molecular genetic data. Several computationally intensive schemes have already been developed for analysis of such data under simple models (see for example Gri ths and Tavar e, 1994; Kuhner et al., 1995; Wilson and Balding, 1998)...
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