[目的/意义] 两个国家间的创新合作机会有些是显性直接的，有些是潜在间接的。在此试图构建一种计量和分析专利引用关系的方法，用于发现两国间潜在的间接创新合作机会。[方法/过程] 全球价值链上不同环节专利之间的引用关系中，蕴含着相互衔接、配套的间接合作关系，而不同环节的专利通常具有不同的功能，即IPC存在一定跨越度。因此，设计"专利引用跨越度"指标及算法，用于计量和筛选专利引用网络中"引用跨越度"达到预设阈值的专利引用关系，作为发现间接创新合作机会的基础数据。以新加坡在中国获得授权的发明专利为样本，基于专利引用跨越度计量并配合人工解读和识别，发现中新两国间一系列的间接创新合作机会。[结果/结论] 基于专利引用跨越度计量的两国间间接创新合作机会发现的方法，被实验检验为有效。
[Purpose/significance] Some of the innovation cooperation opportunities between the two countries are explicit and direct, while others are potentially indirect. This paper attempts to find out the potential indirect innovation cooperation opportunities by measuring and analyzing the citation relationship between patents of the two countries. [Method/process] Citations between the patents which act as various roles in the global value chain, contain indirect cooperation such as mutual joint or complementary support. Patents acting as various roles have different functions and their IPC numbers are crossing different categories. Therefore, the algorithm of "citation crossing degree" was designed to measure and screen the patent citation relationship while the "citation crossing degree" reaches the preset threshold in the patent citation network. These screened relationships are used as the basic data for discovering indirect innovation cooperation opportunities. Taking Singapore's patents granted in China as samples, based on the measurement of citation crossing degree and manual interpretation, a series of indirect innovation cooperation opportunities between China and Singapore were found. [Result/conclusion] The method for discovering the indirect innovation cooperation opportunities between two countries based on the citation crossing degree measurement is proved to be effective by the experiment in this paper.
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