四元低相关区序列偶集的构造研究     

余望鸿  柯品惠 《南平师专学报》2013,(5):40-45

提出了两种四元低相关区序列偶集的构造方法：一种方法是基于理想的二元序列偶,通过逆Gray映射构造四元序列偶.然后通过移位序列,利用交织技术生成长的LCZ序列偶,再运用正交矩阵偶,将其扩展为四元低相关区序列偶集;另一种方法是利用同样方法构造四元序列偶,然后与正交矩阵偶相乘,生成两个新的矩阵,再将该两矩阵对应行进行组合,构造四元低相关区序列偶集.  相似文献   

Exploring the organizational capacity and organizational problems of disability sport clubs in Germany using matched pairs analysis     

《Sport Management Review》2014,17(1):23-34

Previous research examining people with disabilities has mainly looked at participation barriers and has formulated implications for sport providers; however, the supply side has been largely neglected. The purpose of this study was to explore the organizational capacity and organizational problems of clubs that provide sport for people with disabilities (referred to as ‘disability sport clubs’). The conceptual model of organizational capacity was used as a theoretical framework. Within a German sport club sample (n = 19,345), a sub-sample of disability sport clubs (n = 521) was identified. The idea was to compare disability sport clubs with other sport clubs; however, comparing a small sub-sample with a large rest-sample may inevitably lead to statistical significance. Therefore, a matched pairs analysis was applied. Since disability sport clubs were significantly larger in terms of members and sports and were located in bigger communities, statistical twins were identified in the dataset that were similar in size and location. The results showed that clubs providing sport for people with disabilities are not specific disability sport clubs. Evidently, these are large multi-sports clubs that have greater capacity for catering for older adults and low-income people, for strategic planning, and for establishing relationships with other institutions in the community than their statistical twins. The regression results indicated that strategic planning significantly contributed to the reduction of several organizational problems of disability sport clubs. The findings have implications for policy makers, club management, and sport management scholars.  相似文献   

AHAB: Aligning heterogeneous knowledge bases via iterative blocking     

Ling Chen  Weidong Gu  Xiaoxue Tian  Gencai Chen 《Information processing & management》2019,56(1):1-13

With the development of information extraction, there have been an increasing number of large-scale knowledge bases available in different domains. In recent years, a great deal of approaches have been proposed for large-scale knowledge base alignment. Most of them are based on iterative matching. If a pair of entities has been aligned, their compatible neighbors are selected as candidate entity pairs. The limitation of these methods is that they discover candidate entity pairs depending on aligned relations, which cannot be used for aligning heterogeneous knowledge bases. Only few existing methods focus on aligning heterogeneous knowledge bases, which discover candidate entity pairs just for once by traditional blocking methods. However, the performance of these methods depends on blocking keys heavily, which are hard to select. In this paper, we present an approach for aligning heterogeneous knowledge bases via iterative blocking (AHAB) to improve the discovery and refinement of candidate entity pairs. AHAB iteratively utilizes different relations for blocking, and then matches block pairs based on matched entity pairs. The Cartesian product of unmatched entities in matched block pairs forms candidate entity pairs. By filtering out dissimilar candidate entity pairs, matched entity pairs will be found. The number of matched entity pairs proliferates with iterations, which in turn helps match block pairs in each iteration. Experiments on real-world heterogeneous knowledge bases demonstrate that AHAB is able to yield a competitive performance.  相似文献   

R~3上相交线偶与凸体相交的几何概率问题     

范媛媛 《滁州学院学报》2009,11(6):98-100

利用在平面中建立的凸体的双弦幂积分理论,研究了空间中凸体的双弦幂积分的一些性质,并在此基础上,讨论了空间上相交线偶与凸体相交这一几何概率问题。  相似文献   

基于专利交叉影响分析法的技术影响关系研究     

黄斌  黄鲁成  吴菲菲  苗红 《科技管理研究》2015,(15)

针对专利交叉影响分析法存在的不足,从3个方面进行修正与完善,以太阳能聚光器技术领域中的5种技术为研究对象,从德温特专利数据库采集数据对技术影响关系进行实证分析。研究结果表明,改进后的专利交叉影响分析法不仅可以明确地判断技术对的影响类型和定量地划分技术对影响关系并对其进行分析,而且还可以探讨单个技术影响的差异。研究结果可以为技术管理实践提供理论参考依据。  相似文献   

基于广义分圆类的差集偶的新构造     

章海辉  王志华  柯品惠 《南平师专学报》2010,29(2):7-9

利用Whlteman广义分圆类构造了两类差集偶,由构造得到的差集偶可以得到相应最佳二进阵列偶。  相似文献   

双准最佳二进阵列偶搜索算法的研究     

宋海军  柴旭光  王海宾 《邢台职业技术学院学报》2010,27(3):42-43,59

本文在研究双准最佳二进阵列偶理论的基础上,充分利用了双准最佳二进阵列偶的性质,并给出了计算机搜索双准最佳二进阵列偶的算法,并利用该搜索算法搜索出了部分小体积的双准最佳二进阵列偶。  相似文献   

有限区间上的双正交小波的构造     

葛翔 《重庆职业技术学院学报》2010,19(1):98-100

图象处理中,提取图象的边缘特征不仅与选用的小波有关,而且与使用的算法也有关。文章详细介绍了有限区间上的双正交小波的构造,以样条函数构造的双正交小波为例来讨论,求出了L^2[0,1]上的RAesz双正交基。  相似文献   

R^3上相交线偶与凸体相交的几何概率问题     

范媛媛 《滁州师专学报》2009,(6):98-100

利用在平面中建立的凸体的双弦幂积分理论,研究了空间中凸体的双弦幂积分的一些性质,并在此基础上,讨论了空间上相交线偶与凸体相交这一几何概率问题。  相似文献   

Cauchy-Schwartz不等式与时间纠缠判据     

颜辉 《安徽教育学院学报》2011,29(3):23-25

在量子光学中,利用Cauchy-Schwartz不等式可以定义不同性质的光场,从经典光场到量子光场,甚至单光子场;但是Cauchy-Schwartz不等式却不能描述时间纠缠光子对,也就是说并不是违反Cauchy-Schwartz不等式的双光子态都是时间纠缠态。本文系统介绍Cauchy-Schwartz不等式、时间纠缠判据,以及两者的关系。  相似文献