摇摆
发表于 2025-3-26 22:42:38
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难听的声音
发表于 2025-3-27 02:36:40
Asja Lengler,Franziska Sweers,Wolfgang Seitterthe solution of an eigenvalue-eigenvector problem for a positive-semidefinite symmetrie matrix. Thus, the definition and computation of principal components are straightforward but, as will be seen, this apparently simple technique has a wide variety of different applications, as weIl as a number of
可耕种
发表于 2025-3-27 05:22:44
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外星人
发表于 2025-3-27 09:27:13
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枯萎将要
发表于 2025-3-27 17:36:13
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诙谐
发表于 2025-3-27 21:43:38
Atomistic Simulation of a Two-Dimensional Polymer Tougher Than Graphene,d 9× stronger than Kevlar., per mass. Within the base structure of graphylene, the sp.-bonded polyethylene linkages provide compliance for ductile fracture, while the benzene rings contribute to high stiffness and strength. Combining stiff and compliant units to achieve enhanced mechanical performan