Schema matching is a basic problem in the field of data integration, the main aspect of it concerns a match between global schema and local schema.
而模式匹配是数据集成领域中一个基本的问题，它主要考虑全局模式和局部模式之间的匹配。
Image matching belongs to constrained optimization problems. Whether the system would converge to the global optimum is still an open problem.
图像匹配是一种约束最优化问题，系统是否收敛于全局最优值一直尚未解决。
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