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* Optical Fiber Devices including all passive and active fiber devices and components, such as fiber couplers, fiber connectors, fiber gratings, fiber amplifiers and fiber lasers;

In the autumn of 1959, Xingjing county launched a violent requisition campaign against "private property" and applied "on-site maturing, on-site harvesting, on-site threshing grain, and on-site requisitioning." In that year, the county's total grain output is 12.5 million Kg, but they said their output is 50 million Kg. So the nation requisitioned 13.5 million Kg, and the proportion of requisition is 107.72%. The actual population of the county is 96 thousand before this campaign, and 50 thousand people were starved to death after this campaign. This book has recorded memories of 199...

Tensor network is a fundamental mathematical tool with a huge range of applications in physics, such as condensed matter physics, statistic physics, high energy physics, and quantum information sciences. This open access book aims to explain the tensor network contraction approaches in a systematic way, from the basic definitions to the important applications. This book is also useful to those who apply tensor networks in areas beyond physics, such as machine learning and the big-data analysis.   Tensor network originates from the numerical renormalization group approach proposed by K. G....