评估知识产权价值的技术，包括成本法和研发总支出。

The techniques for assessing value of intellectual property include a cost approach and the aggregate expenditure to develop it.

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杜加说，尽管各国占世界研发总支出的比例有所变化，“但美国不必为此惊慌失措。”

Despite the shifting R&D landscape, 'there's no need for the U. S. to panic, ' said Mr. Duga. Instead, he said, 'the U.

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中国的研发支出占全球研发总支出的比例也从2002年的5.0%上升至2010年的12.3%，仅仅排在美国的后面。

Its share of the world's total R&D expenditure grew to 12.3% in 2010 from 5.0% in 2002, placing it second only to the U. S.

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