Lesson 3: XML decomposition load - Uses an annotated schema and decomposition to demonstrate the second method for loading XML documents.

第3课：用XML分解进行装载——通过一个带注释的模式分解来演示装载XML文档的第二种方法。

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The second method is to dump the data to a file, change the model, reset the model, and then load the dumped data back into the new model.

第二种方法是将数据转储到某个文件，更改模型，重置模型，然后将转储的数据重新加载到新模型中。

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Second, in accordance with the number and size of households the load is carried out, the load calculation method adopt needs.

其次根据住户数和户型情况进行了负荷计算，负荷计算时采用了需要系数法。

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