%0 Journal Article
%T APPLICATION OF XYZ SYSTEM IN TELECOMMUNICATION FIELD<br>XYZ系统在电信领域中的应用
%A Shen Wuwei
%A Tang Zhisong
%A <br>沈武威
%A 唐稚松
%J 软件学报
%D 1996
%I 
%X B+ -trees are considered standard organization for indexes in database systems. The concurrent control mechanism on B+ -trees has a great effect on the performance of DBMS supporting multi-users. A variant of B+ -tree called e-B+ -tree(elastic B+ -tree) is presented in this paper. Then, the safe nodes and operations on e--B+ trees are defined and the moment of reconstruction of e-B+tree is regulated. All these measures not only reduce the overhead for maintaining the e--B+ tree and the time spent on locking, but also decrease the frequency of splitting and catenating operation. Therefore, the degree of concurrency of operations on e-B+tree and efficiency of the database system can increase by a big margin.
%K 时序逻辑
%K 电信系统
%K SDL语言
%K XYZ系统
%K 程序验证
%K CASE工具
%K 程序转换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=7735F413D429542E610B3D6AC0D5EC59&aid=B8DBB1FAE73AE6F5C94E1601444B8A96&yid=8A15F8B0AA0E5323&vid=DF92D298D3FF1E6E&iid=B31275AF3241DB2D&sid=4AD4BA66429F5627&eid=6C069F4B248105A5&journal_id=1000-9825&journal_name=软件学报&referenced_num=2&reference_num=6