随机和数学模型；
分析了工作原理和数学模型，研究了它的抗干扰特性，给出了离散随机脉位序列调制码的产生方案。
The block diagram of the system is given and its working principle and mathematic model are analyzed. And also, its anti jamming performances are studied.
首次给出了该随机序列的模糊函数数学表达式。给出了其系统原理框图，分析了其工作原理和数学模型，研究了它的抗干扰特性。
The expression of its ambiguity function is firstly presented, the block diagram of the system is given, the working principle, mathematical model and its performances of anti-jamming are analyzed.
研究了考虑参数随机性的结构静动态特性稳健性优化设计问题的数学模型和数值求解。
The perturbation-based stochastic finite element analysis incorporating structural optimization techniques is employed in the structural robust design problem.
研究了考虑参数随机性的结构静动态特性稳健性优化设计问题的数学模型和数值求解。
The perturbation-based stochastic finite element analysis incorporating structural optimization techniques is employed in the structural robust design problem.
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