针对电子战飞机(electronic combat air vehicle,ECAV)编队对分布式雷达网的航迹欺骗干扰,提出了一种基于新息检验的分布式雷达网虚假航迹鉴别方法。首先,分析了ECAV引入的虚假目标位置误差,研究了其对雷达量测所造成的影响。在此基础上...针对电子战飞机(electronic combat air vehicle,ECAV)编队对分布式雷达网的航迹欺骗干扰,提出了一种基于新息检验的分布式雷达网虚假航迹鉴别方法。首先,分析了ECAV引入的虚假目标位置误差,研究了其对雷达量测所造成的影响。在此基础上,采用Kalman滤波对虚假航迹进行跟踪,并在跟踪的过程中提取归一化新息平方,利用统计假设检验实现单部雷达对航迹真实性的判决,采用m/n逻辑加强判决结果的可靠性,突出了雷达网在信息融合方面的优势。仿真结果表明,该方法能够实现对虚假航迹的准确鉴别。展开更多
体素模型与Monte Carlo模拟计算方法相结合已开始应用于辐射防护的研究中。然而,通常的模拟计算需要很长的时间,这限制了体素模型的广泛应用。该文对模拟计算中体素模型的描述进行研究,实现了把三维体素合并算法用在MCNP(Monte Carlo N-...体素模型与Monte Carlo模拟计算方法相结合已开始应用于辐射防护的研究中。然而,通常的模拟计算需要很长的时间,这限制了体素模型的广泛应用。该文对模拟计算中体素模型的描述进行研究,实现了把三维体素合并算法用在MCNP(Monte Carlo N-particle)程序描述体素模型的方法。结果表明,使用该方法描述体素模型,粒子输运过程要比传统的方法快32%,但是对粒子在组织器官中沉积能量的纪录需要更多时间。关键词:辐射;MCNP(Monte Carlo N-particle);体素;人体模型;展开更多
In this paper,we have addressed the problem of the radiation transport with the Monte Carlo N-particle(MCNP) code.This is a general-purpose Monte Carlo tool designed to transport neutron,photon and electron in three d...In this paper,we have addressed the problem of the radiation transport with the Monte Carlo N-particle(MCNP) code.This is a general-purpose Monte Carlo tool designed to transport neutron,photon and electron in three dimensional geometries.To examine the performance of MCNP5 code in the field of external radiotherapy,we performed the modeling of an Electron Density phantom(EDP) irradiated by photons from 60Co source.The model was used to calculate the Percent Depth Dose(PDD) at different depths in an EDP.One field size for PDD has been examined.A 60Co photons source placed at 80 cm source to surface distance(SSD).The results of calculations were compared to TPS data obtained at National Institute of Oncology of Rabat.展开更多
文摘针对电子战飞机(electronic combat air vehicle,ECAV)编队对分布式雷达网的航迹欺骗干扰,提出了一种基于新息检验的分布式雷达网虚假航迹鉴别方法。首先,分析了ECAV引入的虚假目标位置误差,研究了其对雷达量测所造成的影响。在此基础上,采用Kalman滤波对虚假航迹进行跟踪,并在跟踪的过程中提取归一化新息平方,利用统计假设检验实现单部雷达对航迹真实性的判决,采用m/n逻辑加强判决结果的可靠性,突出了雷达网在信息融合方面的优势。仿真结果表明,该方法能够实现对虚假航迹的准确鉴别。
文摘体素模型与Monte Carlo模拟计算方法相结合已开始应用于辐射防护的研究中。然而,通常的模拟计算需要很长的时间,这限制了体素模型的广泛应用。该文对模拟计算中体素模型的描述进行研究,实现了把三维体素合并算法用在MCNP(Monte Carlo N-particle)程序描述体素模型的方法。结果表明,使用该方法描述体素模型,粒子输运过程要比传统的方法快32%,但是对粒子在组织器官中沉积能量的纪录需要更多时间。关键词:辐射;MCNP(Monte Carlo N-particle);体素;人体模型;
基金Laboratory of Radiation and Nuclear Systems (LRSN)
文摘In this paper,we have addressed the problem of the radiation transport with the Monte Carlo N-particle(MCNP) code.This is a general-purpose Monte Carlo tool designed to transport neutron,photon and electron in three dimensional geometries.To examine the performance of MCNP5 code in the field of external radiotherapy,we performed the modeling of an Electron Density phantom(EDP) irradiated by photons from 60Co source.The model was used to calculate the Percent Depth Dose(PDD) at different depths in an EDP.One field size for PDD has been examined.A 60Co photons source placed at 80 cm source to surface distance(SSD).The results of calculations were compared to TPS data obtained at National Institute of Oncology of Rabat.
