In this paper,we considered the Length-biased weighted Lomax distribution and constructed new acceptance sampling plans(ASPs)where the life test is assumed to be truncated at a pre-assigned time.For the new suggested ...In this paper,we considered the Length-biased weighted Lomax distribution and constructed new acceptance sampling plans(ASPs)where the life test is assumed to be truncated at a pre-assigned time.For the new suggested ASPs,the tables of the minimum samples sizes needed to assert a specific mean life of the test units are obtained.In addition,the values of the corresponding operating characteristic function and the associated producer’s risks are calculated.Analyses of two real data sets are presented to investigate the applicability of the proposed acceptance sampling plans;one data set contains the first failure of 20 small electric carts,and the other data set contains the failure times of the air conditioning system of an airplane.Comparisons are made between the proposed acceptance sampling plans and some existing acceptance sampling plans considered in this study based on the minimum sample sizes.It is observed that the samples sizes based on the proposed acceptance sampling plans are less than their competitors considered in this study.The suggested acceptance sampling plans are recommended for practitioners in the field.展开更多
Recently,the Darna distribution has been introduced as a new lifetime distribution.The two-parameter Darna distribution represents is a mixture of two well-known gamma and exponential distributions.A manufacturer or a...Recently,the Darna distribution has been introduced as a new lifetime distribution.The two-parameter Darna distribution represents is a mixture of two well-known gamma and exponential distributions.A manufacturer or an engineer of products conducts life testing to examine whether the quality level of products meets the customer’s requirements,such as reliability or the minimum lifetime.In this article,an attribute modified chain sampling inspection plan based on the time truncated life test is proposed for items whose lifetime follows the Darna distribution.The plan parameters,including the sample size,the acceptance number,and the past lot result of the proposed sampling plan,are determined with the help of the two-point approach considering the acceptable quality level(AQL)and the limiting quality level(LQL).The plan parameters and the corresponding operating characteristic functions of a new plan are provided in tabular form for various Darna distribution parameters.Also,a few illustrated examples are presented for various distribution parameters.The usefulness of the proposed attribute modified chain sampling plan is investigated using two real failure time datasets.The results indicate that the proposed sampling plan can reduce the sample size when the termination ratio increases for fixed values of the producer’s risk and acceptance number.Hence,the proposed attribute modified chain sampling inspection plan is recommended to practitioners in the field.展开更多
This paper focuses on the fairytale style in Peter Pan which is James Matthew Barrie's masterpiece. This work belongs to fairytale and the protagonist who named Peter Pan never grows up. Through the analysis of Pe...This paper focuses on the fairytale style in Peter Pan which is James Matthew Barrie's masterpiece. This work belongs to fairytale and the protagonist who named Peter Pan never grows up. Through the analysis of Peter Pan and his little friends' experience in real world and Neverland, readers can know the fairytale style in Peter Pan. At the same time, this paper also points out the characterization of Peter pan reflected the writer's attitude to growing up and the fairytale style as bridge between the virtual world and the real world. It is the fairytale style that adds the artistic charm of Peter Pan.展开更多
Investing in children＇ s health is essential to ensure human and economic development. Healthy children have the best chances for healthy, productive lives. At the Fourth Ministerial Conference on Environment and Hea...Investing in children＇ s health is essential to ensure human and economic development. Healthy children have the best chances for healthy, productive lives. At the Fourth Ministerial Conference on Environment and Health in 2004, the countries in the WHO European Region committed themselves to building a healthy future for the Region＇ s children by adopting the Children＇ s Environment and Health Action Plan for Europe.展开更多
基金funding this work through the Research Groups Program under Grant Number R.G.P.2/68/41.I.A.
文摘In this paper,we considered the Length-biased weighted Lomax distribution and constructed new acceptance sampling plans(ASPs)where the life test is assumed to be truncated at a pre-assigned time.For the new suggested ASPs,the tables of the minimum samples sizes needed to assert a specific mean life of the test units are obtained.In addition,the values of the corresponding operating characteristic function and the associated producer’s risks are calculated.Analyses of two real data sets are presented to investigate the applicability of the proposed acceptance sampling plans;one data set contains the first failure of 20 small electric carts,and the other data set contains the failure times of the air conditioning system of an airplane.Comparisons are made between the proposed acceptance sampling plans and some existing acceptance sampling plans considered in this study based on the minimum sample sizes.It is observed that the samples sizes based on the proposed acceptance sampling plans are less than their competitors considered in this study.The suggested acceptance sampling plans are recommended for practitioners in the field.
基金A.R.A.Alanzi would like to thank the Deanship of Scientific Research at Majmaah University for financial support and encouragement.
文摘Recently,the Darna distribution has been introduced as a new lifetime distribution.The two-parameter Darna distribution represents is a mixture of two well-known gamma and exponential distributions.A manufacturer or an engineer of products conducts life testing to examine whether the quality level of products meets the customer’s requirements,such as reliability or the minimum lifetime.In this article,an attribute modified chain sampling inspection plan based on the time truncated life test is proposed for items whose lifetime follows the Darna distribution.The plan parameters,including the sample size,the acceptance number,and the past lot result of the proposed sampling plan,are determined with the help of the two-point approach considering the acceptable quality level(AQL)and the limiting quality level(LQL).The plan parameters and the corresponding operating characteristic functions of a new plan are provided in tabular form for various Darna distribution parameters.Also,a few illustrated examples are presented for various distribution parameters.The usefulness of the proposed attribute modified chain sampling plan is investigated using two real failure time datasets.The results indicate that the proposed sampling plan can reduce the sample size when the termination ratio increases for fixed values of the producer’s risk and acceptance number.Hence,the proposed attribute modified chain sampling inspection plan is recommended to practitioners in the field.
文摘This paper focuses on the fairytale style in Peter Pan which is James Matthew Barrie's masterpiece. This work belongs to fairytale and the protagonist who named Peter Pan never grows up. Through the analysis of Peter Pan and his little friends' experience in real world and Neverland, readers can know the fairytale style in Peter Pan. At the same time, this paper also points out the characterization of Peter pan reflected the writer's attitude to growing up and the fairytale style as bridge between the virtual world and the real world. It is the fairytale style that adds the artistic charm of Peter Pan.
文摘Investing in children＇ s health is essential to ensure human and economic development. Healthy children have the best chances for healthy, productive lives. At the Fourth Ministerial Conference on Environment and Health in 2004, the countries in the WHO European Region committed themselves to building a healthy future for the Region＇ s children by adopting the Children＇ s Environment and Health Action Plan for Europe.
