A Novel Method for Technology Forecasting and Developing R&D Strategy of Building Integrated Photovoltaic Technology Industry

Table 2

Matrix map of patent.

		Purpose sort
		𝑃1	𝑃2	𝑃3	⋯	⋯	𝑃𝑛
Technology sort	T 1	PDQ [1][1]	PDQ [1][2]	PDQ [1][3]	⋯	⋯	PDQ [1][𝑛]
	T 2	PDQ [2][1]	PDQ [2][2]	PDQ [2][3]	⋯	⋯	PDQ [2][𝑛]
	T 3	PDQ [3][1]	PDQ [3][2]	PDQ [3][3]	⋯	⋯	PDQ [3][𝑛]
	⋮	⋮	⋮	⋮	⋮	⋮	⋮
	𝑇𝑚	PDQ [𝑚][1]	PDQ [𝑚][2]	PDQ [𝑚][3]	⋯	⋯	PDQ [𝑚][𝑛]

Notes: PDQ (patent document quantity).