换句话说，当数据库中没有存储Mood实例时，如果在数据库上运行一个基于已有的Person的查询，db4o将如何作出响应(见清单5)？
In other words, how will db4o react if I run an existing Person-based query against the database when no Mood instances are stored (shown in Listing 5)?
通过基于字符串或动态构建的查询选择实例。
Selecting instances by string-based or dynamically constructed query.
华中科技大学数字校园主校区查询系统就是基于分布式多媒体数据库的实例系统。
HUST Digital Campus main section Query system is the instance system based on the distributing multimedia database.
本文结合一个实例从调用API接口的角度，阐述了一种基于事件驱动机制的串口查询法来实现串行通信的思路。
With an instance calling API, the paper discussed the thinking of realizing serial communication by serial port inquiry method based on event driven mechanism.
针对在网络上一个团队进行工艺编制时对CAPP系统的需求，阐述了基于网络的CAPP系统设计、零件图号的网络管理及相似工艺网络查询等问题，并用实例加以验证说明。
Discusses the design of a CAPP system on Windows NT. The management of part drawing numbers, the methods of easy finding similar process planning files and some examples are presented in detail.
同时通过具体的查询实例说明其左深度连接树和浓密连接树的染色体编码方法，并基于该编码方式进一步确定了基本遗传算法中其它的七个变元。
The methods of chromosome coding on left-deep join tree and bushy join tree are showed by query instances, and further other seven parameters of basic genetic algorithms are determined by t…
同时通过具体的查询实例说明其左深度连接树和浓密连接树的染色体编码方法，并基于该编码方式进一步确定了基本遗传算法中其它的七个变元。
The methods of chromosome coding on left-deep join tree and bushy join tree are showed by query instances, and further other seven parameters of basic genetic algorithms are determined by t…
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