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410082, China) Abstract: The adsorption behaviors of diesel cold starting emissions in LTA zeolite was studied by grand canonical Monte Carlo (GCMC) simulation. Ethylene and propylene were used as probe...; hydrocarbon; molecular simulation; Monte Carlo 在柴油机的冷启动阶段,由于起动转速较低,燃烧初始温度较低,漏气和热损失加重,导致压缩温度,压缩压力比正常运行状态下要低很多,从而引起燃烧不稳定,甚至是失火,最终导致起动性差和高的污染物排放,如果冷启动阶段的排放尾气不加以处理,则将会有大量的未燃HC排放到空气中,造成严重的空气的污染.有研究表明[1-2......
density function and Monte Carlo simulations (MCS) were performed to assess the efficiency of the presented method. Two numerical examples were presented to verify the validation of the presented method... principle; first order second moment; Newton iteration; Monte Carlo simulation......
α粒子和Kr+离子对钙钛锆石辐照损伤的Monte Carlo模拟李伟民1,2,董发勤3,李文周4,边亮2,5,宋功保2,卢喜瑞21. 中国工程物理研究院激光聚变研究中心2. 西南科技大学核废物与环境安全国防重点学科实验室3. 西南科技大学固体废物处理与资源化教育部重点实验室4. 中核兰州铀浓缩有限公司5. 河北地质大学摘 要:为研究高能粒子辐照条件下钙钛锆石的微观损伤机制,利用蒙特卡罗SRIM软件包模拟α粒子和Kr+离子在1003 000keV入射能量范围内,钙钛锆石的阻止本领,能量损失,平均投影射程,空位分布和临界非晶注入剂量dpa值.结果表明,当不同能量的α粒子轰击时,入射离子射程为4376 960nm,形成的空位总数为1220个,钙钛锆石以电子阻止本领为主,能量主要以电离能损的方式损耗;当不同能......
. By using the Monte Carlo method, the random sample values of the dynamic parameters were obtained and Lagrange dynamics differential equations were solved for each random sample value which revealed... and the random sample values of dynamic parameters as input quantities, extremum response surface functions were established. A number of random samples were then obtained by using the Monte Carlo method......
Nu分布的影响,得到流量在考察的3种因素内流量的影响作用最强的结论.接着进一步分析Nu数随流量的变化,并拟合得到各处Nu与流量的关系式;为了解决炉内复杂几何形状条件下的辐射换热角系数求解问题,采用Monte Carlo方法建立炉内辐射换热角系数求解模型,并最终采用热辐射网络图法求解炉内辐射换热.通过现场进行热电偶插片实验验证本文所建立模型的准确性.研究结果表明:模拟计算得到的温度值与现场实测值基本一... was analyzed, and the relationship between flow rate and Nu was obtained. In order to solve the problem of solving the angle factor under the condition of complex geometry, using Monte Carlo method the model......
, maximal entropy principle, limit analysis, Monte Carlo method, multiple failure modes, reliability... of parameters of the retaining wall structure were inferred by maximal entropy principle. At last, the structural reliabilities of single failure mode and multiple failure modes were calculated by Monte......
冷轧薄钢板退火组织的计算机模拟 姜寿文1,关小军1,王作成1,赵国群1 (1.山东大学) 摘要:利用Monte Carlo方法及模型进行了冷轧薄钢板静态再结晶退火组织的模拟.通过采用Visual C++在Windows 98平台上的模拟研究,观察了退火过程中钢板组织的连续变化,包括退火时晶界迁移和晶粒相互吞并的过程.模拟了冷轧钢板退火过程晶粒尺寸,再结晶百分比的变化规律以及冷轧压下率对再结晶的影响.将模拟结果与试验结果对比,二者十分吻合. 关键词:Monte Carlo方法 计算机模拟 退火组织 冷轧钢板; [全文内容正在添加中] ......
PCVD法沉积a-Si:H薄膜初始阶段的计算机模拟 林揆训1,林璇英1,姚若河1,杨坤进1,黄创君1 (1.汕头大学物理学系,) 摘要:利用Monte Carlo模型研究了用PCVD法沉积a-Si:H薄膜初始阶段团簇的大小和数目与衬底温度的关系.该模型考虑了两个成长阶段,即成核阶段和晶核成长阶段;3种动力学过程,即粒子入射,吸附粒子扩散和吸附粒子脱附过程.模拟结果表明,随着衬底温度的升高,团簇的数目和大小都有所增长,且存在-个最佳温度550K,使团簇的数目达到饱和,晶粒为最大,与实验结果基本相符. 关键词:薄膜成长; 计算机模拟; Monte Carlo方法; [全文内容正在添加中] ......
. The method was developed from sequential Monte Carlo (SMC)-based probability hypothesis density (PHD) filter, and it was implemented by modifying the original calculation in update weights... using raw observation data.Key words:adaptive particle sampling; multi-target track-before-detect; probability hypothesis density (PHD) filter; sequential Monte Carlo (SMC) method......
in the framework of Bernoulli filter by integrating the model probability parameter and implemented via sequential Monte Carlo (particle) technique. Target detection was accomplished through the estimation... better than the TBD method implemented by the conventional multiple-model particle filter.Key words:Bernoulli filter; multiple model; target maneuver; track-before-detect (TBD); sequential Monte Carlo......