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As can be found from the open literature, much research has been conducted worldwide to investigate the rate-dependence and size-dependence of material properties, respectively.However, the focus has been on the scale effect in the spatial domain with the loading rate being assumed to be quasi-static.The recent interests in developing multiscale model-based simulation procedures have brought about the challenging tasks of bridging different spatial and temporal scales within a unified framework.Based on the experimental and computational capabilities available, an attempt has been made recently to formulate a hyper-surface in both spatial and temporal domains to predict combined specimen size and loading rate effects on the mechanical properties of single crystal materials [1-3].