研究了一类具有良好隐蔽性的一元三次离散动力系统的混沌序列产生情况，提出了混沌序列的异或和置乱加密算法。
The chaos sequence procedure of a kind of discrete dynamic system with good concealing feature is studied, and two algorithms about chaos sequence are provided.
结论异丙酚可能通过抑制大脑缺氧，抑制神经元的凋亡，从而对大鼠局灶性脑缺血-再灌注损伤发挥保护作用。
Conclusion Propofol may inhibit hypoxia in the brain and the apoptosis of nerve cells in result of protecting the cerebral ischemia and reperfusion damage in rats.
结论异丙酚可能通过抑制大脑缺氧，抑制神经元的凋亡，从而对大鼠局灶性脑缺血-再灌注损伤发挥保护作用。
Conclusion Propofol may inhibit hypoxia in the brain and the apoptosis of nerve cells in result of protecting the cerebral ischemia and reperfusion damage in rats.
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