This paper studies the problem of functional inequalities for analytic functions in classical geometric function theory.Using the di erential subordination principle and(p,q)-derivative operator,it introduces(p,q)-ana...This paper studies the problem of functional inequalities for analytic functions in classical geometric function theory.Using the di erential subordination principle and(p,q)-derivative operator,it introduces(p,q)-analog of a class of multivalently Bazilevic functions as-sociated with a limacon function,and obtains the corresponding coefficient estimates and the Fekete-Szego inequality,which extend and improve the related results for starlike functions,even q-starlike functions.展开更多
阐述了p-q-r瞬时功率理论的原理,提出一种特殊情况下的简化p-q-r理论,基于这一理论,提出一种统一电能质量调节器(unified power quality conditioner,UPQC)的综合控制策略,此策略综合了通常的直接控制策略和间接控制策略的特点。重点介...阐述了p-q-r瞬时功率理论的原理,提出一种特殊情况下的简化p-q-r理论,基于这一理论,提出一种统一电能质量调节器(unified power quality conditioner,UPQC)的综合控制策略,此策略综合了通常的直接控制策略和间接控制策略的特点。重点介绍了补偿电流及补偿电压的计算方法,详细分析了控制策略的原理,推导出p-q-r坐标下的相关运算公式,给出了在该坐标轴上的详细控制框图。仿真结果显示,将采用这种控制策略的UPQC用于补偿三相四线非线性及不平衡系统,可以实现对负载谐波、无功及中线电流较好的补偿,使负载获得额定端电压,同时提高电源侧功率因数,表明这种控制策略是可行、有效的。展开更多
基金Supported by Natural Science Foundation of Ningxia(2023AAC 03001)Natural Science Foundation of China(12261068)
文摘This paper studies the problem of functional inequalities for analytic functions in classical geometric function theory.Using the di erential subordination principle and(p,q)-derivative operator,it introduces(p,q)-analog of a class of multivalently Bazilevic functions as-sociated with a limacon function,and obtains the corresponding coefficient estimates and the Fekete-Szego inequality,which extend and improve the related results for starlike functions,even q-starlike functions.
文摘阐述了p-q-r瞬时功率理论的原理,提出一种特殊情况下的简化p-q-r理论,基于这一理论,提出一种统一电能质量调节器(unified power quality conditioner,UPQC)的综合控制策略,此策略综合了通常的直接控制策略和间接控制策略的特点。重点介绍了补偿电流及补偿电压的计算方法,详细分析了控制策略的原理,推导出p-q-r坐标下的相关运算公式,给出了在该坐标轴上的详细控制框图。仿真结果显示,将采用这种控制策略的UPQC用于补偿三相四线非线性及不平衡系统,可以实现对负载谐波、无功及中线电流较好的补偿,使负载获得额定端电压,同时提高电源侧功率因数,表明这种控制策略是可行、有效的。