【摘 要】
：
Let F ={Do, D1,… ,Dl-1} be a (v,K, λ) difference family (DF) over an abelian group G.If F forms a partition of G, then it is called partitioned and denoted by
【机 构】
：
DepartmentofMathematics,SuzhouUniversity,Suzhou215006,China
论文部分内容阅读
Let F ={Do, D1,… ,Dl-1} be a (v,K, λ) difference family (DF) over an abelian group G.If F forms a partition of G, then it is called partitioned and denoted by (v, K, λ)-PDF.Each (n, {|Do|, |D1|,…, |Dl-1|},λ)-PDF can be identified with a zero difference balanced function f with parameters (n, l, λ) from (G, +) to (B, +) defined by f(x) =bi for x ∈ Di , 0 ≤ i ≤ l-1.Zero difference balanced functions were first introduced by Ding (2008) in constructing optimal constant composition codes, optimal and perfect difference systems of sets.
其他文献
简支梁桥面连续板桥国内外应用日益普遍。其荷载横向分布研究如何计算,以往我们尚缺乏依据。通过荷载试验,实测梁的转角及挠度与简支梁体系完全相同,说明连续桥面相对刚度较
An L(2, 1)-labeling of a graph is an assignment of nonnegative integers to the vertices of G such that adjacent vertices have numbers at least 2 apart, and vert
协同治理视角下大数据赋能公共危机治理是时代和社会发展以及公共危机应对技术创新的必然要求.随着大数据时代的到来,数据共享深入到生产生活各个方面,在带来发展机遇和发展
It is well-known that each nonnegative integral flow of a directed graph can be decomposed into a sum of nonnegative graph circuit flows, which cannot be furthe
日前,国家统计局发布数据,4月份,全国居民消费价格同比上涨3.3％,涨幅比上月回落1.0个百分点,连续三个月回落.1—4月平均,全国居民消费价格比去年同期上涨4.5％.相关人士指出,在
Two q-difference equations with solutions expressed by q-exponential operator identities are investigated.As applications, two extensions of Ramanujans formulas
近日,示范区执委会、上海市经信委、江苏省经信厅、浙江省经信厅联合发布了《长三角生态绿色一体化发展示范区先行启动区产业项目准入标准》(下称《准入标准》),其中提出了四
1957年是我省全体人民执行第一个五年计划的最后一年。这一年,我省人民在党中央和国务院的正确领导下,开展了全民性的整风运动和反右派斗争,取得了政治战线和思想战线上的社
We prove a conjecture of D.Armstrong on the average maximal length of kalternating subsequence of permutations.The k =1 case is a well-known result of Richard S