the National Natural Science Foundation of China (No. 10771193);the Starter Foundation for the Doctors of Zhejiang Gongshang University(No. 1020XJ030517);the Natural Science Foundationof Universities of Jiangsu Province (No. 07KJB110090);the Starter Foundation for the Doctors of Nantong University (No. 07B12)
Let (v, u × c,λ)-splitting BIBD denote a (v, u × c,λ)-splitting balanced incomplete block design of order v with block size u × c and index A. The necessary conditions for the existence of a (v, u × c,λ)-...