MEI(Measured Equation of Invariance)方法是一种有效的用于边界截断的数值计算方法,已在计算电磁学领域得到广泛应用,其中MEI方程的病态性是值得关注的一个问题.该文采用有限元方法求解与二维电磁波散射问题相关的Helmholtz方程,重点...MEI(Measured Equation of Invariance)方法是一种有效的用于边界截断的数值计算方法,已在计算电磁学领域得到广泛应用,其中MEI方程的病态性是值得关注的一个问题.该文采用有限元方法求解与二维电磁波散射问题相关的Helmholtz方程,重点研究将自适应遗传算法应用于MEI方程的求解.该文的研究结果表明,应用自适应遗传算法求解MEI方程是有效的.展开更多
[ Objective ] The aim was to select appropriate sterilization methods and explants for tissue culture of Haloxylon ammodendron ( C. A. Mey. ). [Method] H. ammodendron (C. A. Mey. ) seeds were used as experimental ...[ Objective ] The aim was to select appropriate sterilization methods and explants for tissue culture of Haloxylon ammodendron ( C. A. Mey. ). [Method] H. ammodendron (C. A. Mey. ) seeds were used as experimental materials to investigate the sterilization results of different sterilization treatments and the effect of different seed sizes on the survival rate of aseptic seedlings. [ Result] Sterilization of H. ammodendron ( C.A. Mey. ) seeds achieved the best result by using 75% alcohol for 15 min and 0.1% mercuric chloride for 8 min. Seeds with diameter φ 〉 2.0 mm were used as explants and achieved relatively high surviv- al rate of aseptic seedlings, which reached above 65%. [ Conclusion] This study established a surface sterilization method for tissue culture of H. ammodendron ( C. A. Mey. ) Bunge seeds.展开更多
针对二维电大尺寸对象电磁散射场的计算,提出一种电磁散射快速算法,该算法以不变性测试方程(measured equation of invariance,MEI)方法为基础,将循环卷积和测试电流跳点平均技术分别用于不同区域对应的MEI系数,可以大大加速MEI测试方...针对二维电大尺寸对象电磁散射场的计算,提出一种电磁散射快速算法,该算法以不变性测试方程(measured equation of invariance,MEI)方法为基础,将循环卷积和测试电流跳点平均技术分别用于不同区域对应的MEI系数,可以大大加速MEI测试方程系数的计算,提高MEI方法的计算速度,通过二维实例的仿真计算验证了这种算法的计算效率和准确度,证实了算法的有效性。展开更多
文摘MEI(Measured Equation of Invariance)方法是一种有效的用于边界截断的数值计算方法,已在计算电磁学领域得到广泛应用,其中MEI方程的病态性是值得关注的一个问题.该文采用有限元方法求解与二维电磁波散射问题相关的Helmholtz方程,重点研究将自适应遗传算法应用于MEI方程的求解.该文的研究结果表明,应用自适应遗传算法求解MEI方程是有效的.
基金Supported by Open Project of Key Laboratory of Tarim Animal Husbandry Science and Technology from Xinjiang Production & Construction Crops(HS20901)
文摘[ Objective ] The aim was to select appropriate sterilization methods and explants for tissue culture of Haloxylon ammodendron ( C. A. Mey. ). [Method] H. ammodendron (C. A. Mey. ) seeds were used as experimental materials to investigate the sterilization results of different sterilization treatments and the effect of different seed sizes on the survival rate of aseptic seedlings. [ Result] Sterilization of H. ammodendron ( C.A. Mey. ) seeds achieved the best result by using 75% alcohol for 15 min and 0.1% mercuric chloride for 8 min. Seeds with diameter φ 〉 2.0 mm were used as explants and achieved relatively high surviv- al rate of aseptic seedlings, which reached above 65%. [ Conclusion] This study established a surface sterilization method for tissue culture of H. ammodendron ( C. A. Mey. ) Bunge seeds.
文摘针对二维电大尺寸对象电磁散射场的计算,提出一种电磁散射快速算法,该算法以不变性测试方程(measured equation of invariance,MEI)方法为基础,将循环卷积和测试电流跳点平均技术分别用于不同区域对应的MEI系数,可以大大加速MEI测试方程系数的计算,提高MEI方法的计算速度,通过二维实例的仿真计算验证了这种算法的计算效率和准确度,证实了算法的有效性。