The assumption of homoscedasticity has received much attention in classical analysis of regression. Heteroscedasticity tests have been well studied in parametric and nonparametric regressions. The aim of this paper is...The assumption of homoscedasticity has received much attention in classical analysis of regression. Heteroscedasticity tests have been well studied in parametric and nonparametric regressions. The aim of this paper is to present a test of heteroscedasticity for nonlinear semiparametric regression models with nonparametric variance function. The validity of the proposed test is illustrated by two simulated examples and a real data example.展开更多
In order to effectively solve the dead-zone and low-precision of T-shaped transmission line fault location,a new T-shaped transmission line fault location algorithm based on phase-angle jump checking is proposed in th...In order to effectively solve the dead-zone and low-precision of T-shaped transmission line fault location,a new T-shaped transmission line fault location algorithm based on phase-angle jump checking is proposed in this paper.Firstly,the 3-terminal synchronous fundamental positive sequence voltage and current phasors are extracted and substituted into the fault branch distance function to realize the selection of fault branch when the fault occurs;Secondly,use the condition of the fundamental positive sequence voltage phasor at the fault point is equal to calculate all roots(including real root and virtual roots);Finally,the phase-angle jump check function is used for checking calculation,and then the only real root can be determined as the actual fault distance,thereby achieving the purpose of high-precision fault location.MATLAB simulation results show that the proposed new algorithm is feasible and effective with high fault location accuracy and good versatility.展开更多
目的:完善我院静脉用药集中调配中心(PIVAS)合理用药审核系统,加强合理用药审核的准确性,提高工作效率。方法:找出我院现有合理用药审核系统功能的不足之处,对其进行功能改进和完善,并对功能完善前、后3个月的相关指标进行统计、比较。...目的:完善我院静脉用药集中调配中心(PIVAS)合理用药审核系统,加强合理用药审核的准确性,提高工作效率。方法:找出我院现有合理用药审核系统功能的不足之处,对其进行功能改进和完善,并对功能完善前、后3个月的相关指标进行统计、比较。结果与结论:针对系统中存在的"问题医嘱"不能有效反馈或漏停,新旧医嘱、已审核与未审核医嘱、已停医嘱与正常医嘱等在系统中不能明确区分及查看等不足,在系统中增加了医嘱拒发功能以及多项筛选和查询功能。新功能的使用,使人均日审核医嘱数增加(96.5组vs.144.8组),日处理退费医嘱数(158.3组vs.47.6组)、日处理漏审医嘱数(0.32组vs.0组)、日处理多余打包药品医嘱数(2.1组vs.0组)以及日处理停医嘱拒发时间(15 min vs.0.028 min)等降低,使医嘱审核各项操作更简便、快捷,提高了医嘱审核的准确性和效率,减少了不合理医嘱的执行。展开更多
基金Supported by the Natural Science Foundation of Jiangsu Province (BK2008284)
文摘The assumption of homoscedasticity has received much attention in classical analysis of regression. Heteroscedasticity tests have been well studied in parametric and nonparametric regressions. The aim of this paper is to present a test of heteroscedasticity for nonlinear semiparametric regression models with nonparametric variance function. The validity of the proposed test is illustrated by two simulated examples and a real data example.
基金supported by National Nature Science Foundation of China(51507031).
文摘In order to effectively solve the dead-zone and low-precision of T-shaped transmission line fault location,a new T-shaped transmission line fault location algorithm based on phase-angle jump checking is proposed in this paper.Firstly,the 3-terminal synchronous fundamental positive sequence voltage and current phasors are extracted and substituted into the fault branch distance function to realize the selection of fault branch when the fault occurs;Secondly,use the condition of the fundamental positive sequence voltage phasor at the fault point is equal to calculate all roots(including real root and virtual roots);Finally,the phase-angle jump check function is used for checking calculation,and then the only real root can be determined as the actual fault distance,thereby achieving the purpose of high-precision fault location.MATLAB simulation results show that the proposed new algorithm is feasible and effective with high fault location accuracy and good versatility.
文摘目的:完善我院静脉用药集中调配中心(PIVAS)合理用药审核系统,加强合理用药审核的准确性,提高工作效率。方法:找出我院现有合理用药审核系统功能的不足之处,对其进行功能改进和完善,并对功能完善前、后3个月的相关指标进行统计、比较。结果与结论:针对系统中存在的"问题医嘱"不能有效反馈或漏停,新旧医嘱、已审核与未审核医嘱、已停医嘱与正常医嘱等在系统中不能明确区分及查看等不足,在系统中增加了医嘱拒发功能以及多项筛选和查询功能。新功能的使用,使人均日审核医嘱数增加(96.5组vs.144.8组),日处理退费医嘱数(158.3组vs.47.6组)、日处理漏审医嘱数(0.32组vs.0组)、日处理多余打包药品医嘱数(2.1组vs.0组)以及日处理停医嘱拒发时间(15 min vs.0.028 min)等降低,使医嘱审核各项操作更简便、快捷,提高了医嘱审核的准确性和效率,减少了不合理医嘱的执行。
