其中一个原因是云应用程序通常比较便宜、管理简单、且容易更新和使用。
One reason is that cloud applications are often less expensive, simple to manage, and easy to update and use.
高质量、强现势性的城市空间数据的获取、更新和使用问题已成为当前“数字广州”建设中的瓶颈。
Currently the gathering, update and usage of high quality and up-to-date urban spatial data have become the bottleneck in the construction of "Digital Guangzhou".
由于使用e JB 2查询存在性能问题,我们很早就决定对于查询操作使用直接JDBC调用,而对于创建、检索、更新和删除(CRUD)操作则使用EJB2 CMP。
Because of performance problems using EJB2 queries, we decided a long time ago to use direct JDBC calls for query operations and EJB2 CMP for create, retrieve, update, and delete (CRUD) operations.
How much does it cost both to create the technology and to use it?
创造新技术和使用它,分别需要花多少钱?
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