2009-11-20 SaaS数据机密性(任国珍) + 论文报告(Extending RDBMS To Support Sparse Datasets - Using An Interpreted Attribute Storage Format)(王学) + 论文报告(A Policy-Driven Approach for Software-as-Services Customization)(郑旭旭) + 论文报告(Frontiers in Information and SaaS)(申宇)