Shell China Exploration and Production Company Limited has acquired a 55% equity interest in a coalbed methane venture ......

Aim: To compare the effect of brimonidine and timolol in reducing visual field loss in acute primary angle closure (APA......

对分布式事务采用多副本并发控制的多数法，实现了一个多层分布式数据库应用系统的模型设计；引入了协调对象并使用COM＋技术，在实现分布......

证明了在群体中,当各个体正确判断方案满意性的概率越分散,由多数满意规则确定的相应群体正确判断方案满意性的概率将越大.根据这......