At the same time, attacks upon networks are increasing very fast, computer criminal events occur quite often, and network securities are seriously threatened.
与之相伴，对网络的各类攻击与破坏也与日俱增，计算机犯罪越来越多，网络安全受到严重威胁。
Neural networks for solving the securities portfolio model of tradeoff between risk and return;
以证券组合选择为研究对象，讨论寻求高收益、低风险的最佳证券组合。
Neural networks for solving the securities portfolio model of tradeoff between risk and return;
以证券组合选择为研究对象，讨论寻求高收益、低风险的最佳证券组合。
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