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Controlling the heterogeneous nucleation of new phases is of importance in tuning the microstructures and properties of materials. However, the role of vacancy—a popular defect in materials that is hard to be resolved under conventional electron microscopy—in the heterogeneous phase nucleation remains intriguing. Here, this work captures direct in situ experimental evidences that vacancy clusters...
The construction of courses group which appears recently in the courses construction practice of institutions of higher education is a new curriculum development technique. Starting from construction of course groups of our college and actual of the reform, this paper summarizes our college capacity courses group construction' problems, as viewed from strengthening course groups construction and stressing...
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