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Si类多项式初探 总被引：6，自引：4，他引：6
刘保乾 《广东教育学院学报》2007,27(5):6-13
以Si类多项式为基础给出了多项式分类;利用Si类对称多项式通式构造了部分Si类对称多项式分拆基;给出了应用实例. 相似文献
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本丈给出了两类修正的Grunwald插值算子,并且给出了其在LBaM空间范数下以第一类Chebyshev多项式的零点为结点时的逼近阶. 相似文献
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最近,E.R.Puczylowski用公理化方法建立了外延广泛的代数系统--代数对象类的概念,它包含了大多数已知的代数范畴.并且,在特殊的代数对象类--正规代数类中,他给出了半单类的一个特征.本文的目的是在正规代数类中给出半单闭包的构造. 相似文献
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给出了负二项分布的两个不同定义,给出了两类负二项随机变量的期望、方差与矩母函数。从直观上对这两类负二项随机变量做了描述。 相似文献
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利用图的分解约化定理给出了类网图,类铅笔图的填充数,并给出了怎样构造图可使其具有分解结构,进而可求出它的填充数. 相似文献
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彭家寅 《内江师范学院学报》2011,26(12):1-5
引入了模糊袋自动机和模糊袋语言的概念,给出了模糊袋自动机的状态转换图,讨论了模糊袋语言重复序列在状态转换图的结构特征,给出了Chomsky文法模糊语言与模糊袋语言的关系．指出了模糊正规语言类、模糊袋语言类、模糊上下文有关语言类之间的包含关系,及模糊袋语言类与模糊上下文无关语言类交叉关系． 相似文献
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文[1]给出了四类平均数在圆中的几何模型,容易用尺规作出;文[2]又给出了四类平均数在四边形中的几何模型,但是其中的几何平均数及平方平均数的几何表示巨疋及巴凡不易由尺规作出．受两者启发,笔者又给出了两种用尺规容易作出的四类平均数的几何模型,期待能够抛砖引玉． 相似文献
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清华简《保训》述及舜"求中"、"得中",上甲微"假中"、"归中",论者说以中道。借助对有关记载的中、中和、中正、中庸及相关的极、皇极诸概念的比证分析,可知中乃一内涵极为丰富的政治伦理概念,代表了中国古代的治道理想,其义当从三代的河洛文化背景内寻绎。"保训"当读为"宝训",但绝非"珍贵的训诫"。宝者以道为贵宝,其义存于《逸周书·宝典》所记载武王对周公的训谕之中。 相似文献
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设{Xk,1≤k≤n}独立同分布,X(1),X(2),…,X(n)为其顺序统计量.当Xk服从参数为σ(σ>0)的瑞利分布时,得到了(X(1),X(2),…X(n))的联合概率密度函数,以及X(1)和X(n)的密度函数.从而进一步得到X(1)和X(n)的数学期望与方差的表达式.此外还证明了X(1),X(2)-X(1),…,X(n)-X(n-1)不独立,且不同分布. 相似文献
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《红楼梦》前80回"和"类连词有"和、并、与、及、以及、同、连"等七个。这些并列连词在分布和用法上存在着明显差异:"和、并、与"使用频率很高,尤其是"和"、"并",竟占总用量的66%强,而"及、以及、同、连"则使用频率较低。除了"并"的用法比较复杂外,其他并列连词的用法均显得比较单一。这些并列连词还可以连用,有的甚至可以组合在一起使用。 相似文献
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Child sexual abuse (CSA) interventions draw from a better understanding of the context of CSA. A survey on violence before age 18 was conducted among respondents aged 13–17 and 18–24 years. Among females (13–17), the key perpetrators of unwanted sexual touching (UST) were friends/classmates (27.0%) and among males, intimate partners (IP) (35.9%). The first incident of UST among females occurred while traveling on foot (33.0%) and among males, in the respondent's home (29.1%). Among females (13–17), the key perpetrators of unwanted attempted sex (UAS) were relatives (28.9%) and among males, friends/classmates (31.0%). Among females, UAS occurred mainly while traveling on foot (42.2%) and among males, in school (40.8%). Among females and males (18–24 years), the main perpetrators of UST were IP (32.1% and 43.9%) and the first incident occurred mainly in school (24.9% and 26.0%), respectively. The main perpetrators of UAS among females and males (18–24 years) were IP (33.3% and 40.6%, respectively). Among females, UAS occurred while traveling on foot (32.7%), and among males, in the respondent's home (38.8%); UAS occurred mostly in the evening (females 60.7%; males 41.4%) or afternoon (females 27.8%; males 37.9%). Among females (18–24 years), the main perpetrators of pressured/forced sex were IP and the first incidents occurred in the perpetrator's home. Prevention interventions need to consider perpetrators and context of CSA to increase their effectiveness. In Kenya, effective CSA prevention interventions that target intimate relationships among young people, the home and school settings are needed. 相似文献
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蒋楠 《楚雄师范学院学报》2003,18(6):114-118
本文通过研究表明:本文用完全双列杂交对五品种肉兔:加州兔(C)、新西兰兔(N)、丹麦白兔(D)、花巨兔(G)、比利时兔(B)进行了一般配合力(GCA)和特殊配合力(SCA)分析,估计了杂交组合的杂种优势率(RH),结果表明:半净膛、全净膛屠宰率在父本中差异不显著,在母本则有极显著差异。多重比较方法分析所得半净膛、全净膛屠宰率在母本中高低依次为新西兰兔、花巨兔、比利时兔、丹麦白兔、加州兔,其中新西兰兔、花巨兔的母本的半净膛率分别极显著(P<0.01),显著高于丹麦白兔和加州兔。因此,新西兰兔母本最好,加州母兔最差。特殊配合力分析两指标互作效应均不明显,杂交无优势。肉质性状间普遍存在一定的表型相关,但多数未能达到0.05的显著水平。pH2L与pH2S有显著的强正相关(P<0.05);对于胴体性状而言,全净膛屠宰率、半净膛屠宰率为极显著的强正相关(r=0.985,P<0.01)。肉质性状和胴体性状之间存在弱负相关,因此,总体上讲肉质与胴体性状间的关系表现为一种颉颃性的相关。 相似文献
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CHEN Jian ming ZHANG Jian cheng SHEN Yue LIU Xiu hong YANG Lin hong School of Material Science Engineering Shanghai University Shanghai China 《上海大学学报(英文版)》2001,(2)
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｒｅｃｅｎｔｌｙｐｈｔｈａｌｏｃｙａｎｉｎｅｓ (Ｐｃｓ)ａｓｏｒｇａｎｉｃｓｅｍｉｃｏｎ ｄｕｃｔｏｒｓｈａｖｅａｔｔｒａｃｔｅｄｍｏｒｅａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｔｈｅｙａｒｅｖｅｒｙｓｔａｂｌｅ .Ｐｃｓ ｐｏｓｓｅｓｓｂｅｔｔｅｒ ｐｈｏｔｏｅｌｅｃｔｒｉｃａｌｐｒｏｐｅｒｔｉｅｓａｎｄｈｉｇｈｌｙａｂｓｏｒｐｔｉｏｎｉｎｔｈｅｖｉｓｉｂｌｅｌｉｇｈｔｒｅ ｇｉｏｎ .ＳｏｍｅｐｒｏｐｅｒｔｉｅｓｏｆＰｃｓｃａｎｂｅｉｍｐｒｏｖｅｄａｌｏｔｂｙｂｏｎｄｉｎｇｔｏｐ… 相似文献
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Teachers’ professional development (PD) receives a great deal of attention in current educational settings. However, research has shown that many teachers hesitate to attend PD programs. In this study, data were collected from 270 elementary school teachers and were subjected to confirmatory factor analysis and structural equation modeling to examine their intention to attend the weekly PD programs on Wednesday afternoons (PDWAP). The results revealed that the participants value the acquisition of pedagogical content knowledge (PCK) more than they value pedagogical knowledge (PK) and content knowledge (CK) because of the expected usefulness of each for teaching. Moreover, the results of this study have implications for PD program design, and call for a stronger focus on PCK.
AbbreviationAdjusted Goodness of Fit Index (AGFI); Analysis of Moment Structures(AMOS); average variance (AVE); Chi-square(); content knowledge (CK); continuing professional development (CPD); Comparative Fit Index (CFI); degree of freedom (df); expectancy-value theory (EVT); Goodness of Fit Index (GFI); Incremental Fit Index (IFI); Mean(M); Parsimonious Goodness of Fit Index (PGFI); Parsimonious Normed Fit Index (PNFI); Parsimonious comparative-fit-index (PCFI); pedagogical content knowledge (PCK); pedagogical knowledge (PK); professional development (PD); professional development programs on Wednesday afternoons (PDWAP); Root Mean Square Error of Approximation (RMSEA); standard deviation (SD); structural equation modeling (SEM); square of multiple correlation coefficients (R2); Teaching Beliefs Survey (TBS); theory of planned behavior (TPB); Tucker-Lewis Index (TLI); United Kingdom (UK) 相似文献
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设(F)为定义在区域D内的一族亚纯函数,a(z)和b(z)为两个在D满足a(z)≠b(z)和a(z)≠b(k)(z)以及a(z)(≠)a'(z)的全纯函数,若对于任意的f∈(F),f(z)-a(z)的零点重级至少是k,f(z)和f(k)(z)分担a(z),且当f(z)=b(z)时,f(k)(z)=b(z),那么(F)在... 相似文献
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本文研究了高阶齐次线性微分方程f（k）＋Ak-1（z）e^pk-1（z）f^（k-1）＋Ak-2（z）^e^pk-2（z）f（k-2）＋…＋A0（z）e^pk（z）f=0和f（k）＋（Ak-1（z）e^pk-1（z）＋D（k-1）（z））f（k-1）＋…＋（A0（z）ep0（z）＋D0（z））f=0解的增长性问题,其中Pjk（z）=ajz^n＋bj,lz^n-1＋…bj,n,Aj（z）和Dj（z）是有限级整函数。针对Pj（z）中aj（j=0,1,…k-1）的幅角主值不全相等的情形。得到了σ2（f）=∞。 相似文献