本文首先扩展了任务结构的表达能力，增加了对任务间数据流的支持；然后对扩展任务结构的合理性进行了分析和验证。
At first we extend the expressive power of the task structure such that it can support data flow between tasks, and then we analyze and verify the soundness of the extended task structure.
通过使用NIEMXMLSchema结构、命名约定和额外的元数据，很容易扩展转换任务。
By using NIEM XML Schema structure, naming conventions, and additional metadata, the transformation task is much easier to extend.
实验测试结果表明，该系统结构对多任务具有较好的并行效率和可扩展性，能够充分利用系统的并行计算资源，达到较好的绘制效果。
Experiments show that it has better parallel efficiency and scalability, can take full advantage of its own resources, and has wonderful rendering effect.
实验测试结果表明，该系统结构对多任务具有较好的并行效率和可扩展性，能够充分利用系统的并行计算资源，达到较好的绘制效果。
Experiments show that it has better parallel efficiency and scalability, can take full advantage of its own resources, and has wonderful rendering effect.
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