نتایج جستجو برای: finite dierence
تعداد نتایج: 258100 فیلتر نتایج به سال:
a note on character kernels in finite groups of prime power orde
The present paper proposes a fast numerical method for the linear Volterra integral equations withregular and weakly singular kernels having smooth solutions. This method is based on the approx-imation of the kernel, to simplify the integral operator and then discretization of the simpliedoperator using a forward dierence formula. To analyze and verify the accuracy of the method, weexamine samp...
Title Part Symbols d mean temperature dierence, K, (see eq. (1)) m sample size p pressure, hPa (or 100 Pa) s sample standard deviation, K, (see eq. (2)) T temperature, K t Student's t-test statistic (see eq. (3)) x station temperature value from single sounding, K Z geopotential height, km z geometric altitude, km Subscripts: j pair number (see eq. (1)) m sample size (see eq. (3)) 1 satellite (...
Folic acid and folate binding protein (FABP) concentrations were determined in 208 pregnant women as well as in 50 non-pregnant women. Serum folate levels in pregnant women were significantly lower than those of the non-pregnant group. Anaemic pregnant women also had lower serum folate concentrations than those of the non-anaemic pregnant women. Ninetyeight of 208 (47.1%) pregnant women had ser...
this thesis basically deals with the well-known notion of the bear-invariant of groups, which is the generalization of the schur multiplier of groups. in chapter two, section 2.1, we present an explicit formula for the bear-invariant of a direct product of cyclic groups with respect to nc, c>1. also in section 2.2, we caculate the baer-invatiant of a nilpotent product of cyclic groups wuth resp...
Aggregation operators (AOs) have been studied by many schol- ars. As many AOs are proposed, there is still lacking approach to classify the categories of AO, and to select the appropriate AO within the AO candidates. In this research, each AO can be regarded as a cognitive style or individual dierence. A Cognitive Style and Aggregation Operator (CSAO) model is pro- posed to analyze the mapping ...
ZnO as a promising photocatalyst has gained much attention for the removal of organic pollutants from water. However, main drawbacks relatively low photocatalytic activity and high recombination rate photo excited electronhole pairs, restrict its potential applications. Promoting spatial separation charge carriers is paramount signi? cance photocatalysis, because dierence in band positions make...
aggregation operators (aos) have been studied by many schol- ars. as many aos are proposed, there is still lacking approach to classify the categories of ao, and to select the appropriate ao within the ao candidates. in this research, each ao can be regarded as a cognitive style or individual dierence. a cognitive style and aggregation operator (csao) model is pro- posed to analyze the mapping ...
chapter one is devotod to collect some notion and background informations, which are needed in the next chapters. it also contains some important statements which will be proved in a more general context later in this thesis. in chapter two, we show that if the marginal factor-group is of order np1...pk,n>1, then we obtain a bound for the order of the verbal subgroup. also a bound for the bear-...
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