一种辐射屏蔽模拟计算的方法

本文论述了用蒙特卡罗方法直接模拟计算非带电粒子辐射的屏蔽穿透概率问题,讨论了粒子穿透概率无偏估计的两种实际情况,探讨了将粒子输运理论应用于解决实际辐射物理问题的途径。     

利用Monte Carlo法,确定对坦克临战队形射击的火力分配方案

利用Monte Carlo法,对坦克临战队形射击的两种不同的方案进行模拟比较,以确定出最优的火力分配方案。     

On fair designs of cross-chain exchange for cryptocurrencies via Monte Carlo simulation

Cryptocurrency is one of the earliest and the most successful applications of blockchain, and it utilizes the distributed ledger, which is a commonly used technique in blockchain, to make a decentralized transaction within the blockchain of a cryptocurrency. However, how to make a decentralized transaction of cryptocurrencies between parties on different blockchains, that is, the cross-chain exchange, is not well-studied. In this paper, we develop a new method to make cross-chain exchanges based on the classical atomic swap. We first study the optionality embedded into the atomic swap and propose to add a premium into the atomic swap, and then design a new procedure with the premium to guarantee the fairness of the cross-chain exchange. We also provide an algorithm based on the least-squares Monte Carlo method to estimate the premium and analyze the convergence of the algorithm. Moreover, we study the cross-chain exchange with margin trading. We propose an adapted exchange procedure to make a fair cross-chain exchange and an algorithm to estimate the fair premium under the margin trading. Numerical experiments are provided to show the effectiveness of the algorithms.     

基于Bayes小子样二项分布单元可靠性评定的仿真方法

对于小子样二项分布单元可靠度下限评定,经典方法有很大局限性,文中介绍了Bayes方法。并在其基础上提出基于Bayes方法的Monte Carlo仿真方法,示例证明,该方法有很好的应用前途。     

利用蒙特卡洛法评定火箭炮对岸射击效能

为了更好的评定舰载火箭炮对岸射击的射击效能,选用了毁伤概率为效能指标,应用重叠系数法排除子弹重叠的影响,运用蒙特卡罗法计算出毁伤概率,并给出了保证实验精度的方法。实际举例结果表明,在评定毁伤效率时,应用重叠系数较大程度地减少因重叠造成的误差。该方法在研究火箭弹对岸射击效能时,能够更好的提高精度,减小误差。     

侵彻子母弹封锁机场跑道最小升降窗口搜索算法研究

针对侵彻子母弹封锁机场跑道中判断是否存在最小升降窗口的"两点比较"算法,提出更为符合实际毁伤情况的"网格-矩阵"算法。采用随机分布的数学模型和计算机仿真模型,利用Monte Carlo法模拟侵彻子母弹子弹的落点。最后在Matlab7.0环境下对两种算法进行了仿真试验和对比分析,提出两种算法在火力辅助决策中的使用建议。     

Tests for homogeneity of distributions of component lifetimes from system lifetime data with known system signatures

In this article, we discuss the problem of testing the homogeneity of distributions of component lifetimes based on system lifetime data when the system signatures are known. Both parametric and nonparametric procedures are developed for this problem. For nonparametric testing, the Mann–Whitney‐type statistic is used, and its performance and limitations are discussed. Next, we assume the component lifetimes to follow exponential distributions and then develop different parametric tests. Exact and asymptotic methods are developed based on the method of moments estimators. A Monte Carlo simulation study is used to compare the performance of different parametric procedures with that of the nonparametric procedure. Based on the results of the simulation study, discussions and practical recommendations are made and finally some concluding remarks are provided. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 550–563, 2015     

基于MCMC方法的Lorenz混沌系统的参数估计

基于贝叶斯理论,提出用马尔科夫链蒙特卡罗(MCMC)方法来估计Lorenz混沌系统的未知参数。首先导出了未知参数分布规律的后验概率密度函数;接着采用自适应Metropolis算法构造Markov链;然后截取收敛的链序列,计算混沌系统参数的估计值。数值试验表明:该方法具有很高的估计精度,同时具有较好的抗噪声性能。     

综合火控系统对地轰炸精度分析仿真

针对航空轰炸武器火控系统精度分析问题,分别建立了数值微分算法和蒙特卡洛算法模型,并开发了仿真分析软件.给出了两种模型的推导过程,以及微分步长的优化方法.利用本算法软件对某型火控系统进行精度分析仿真,并对多组典型投弹条件的仿真结果进行分析.结果表明,两种算法优势互补,能有效地对火控系统进行精度分析,对改进系统设计、提高系...     

面向远火面压制的阵地体系生存效能评估

为满足阵地战时毁伤规律研究需要,以阵地体系为研究对象,从系统的角度出发,探究阵地体系目标生存效能与物理毁伤的映射关系,构建阵地体系生存效能评估模型,并运用蒙特卡洛方法实现阵地目标毁伤模拟,给阵地体系目标的毁伤量化评估与防护决策提供了依据.