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Efficient Process Monitoring Under General Weibull Distribution

Computer Systems Science & Engineering 2022年第1期40卷 287-297页

作者： saman hanif shahbaz Muhammad Qaiser shahbaz Department of Statistics King Abdulaziz UniversityJeddahKingdom of Saudi Arabia

Product testing is a key ingredient in maintaining the quality of a pro-duction *** production process is considered an efficient process if it is capable of quick identification of faulty *** items produced by any production process are usually packed and acceptance or rejection of the pack depends upon its conformity to some specified quality ***,the specified quality level is based upon the number of defective items found in the inspected number of *** decisions are based upon some rules and usually acceptance of the pack is based upon a fewer number of defective items in the *** questions can be answered by using acceptance sampling *** acceptance sampling plans assume the fact that the quality level of the item follows some probability *** sampling plans based upon some classical probability distributions are available but often it happens that the quality behavior of the product does not follow a simple probability model and hence the available sampling plans *** this paper,we have developed acceptance sampling plans when the product life follows a general Weibull *** sampling plans have been constructed by considering the crisp and fuzzy behavior of the acceptance *** sampling plans have been constructed by assuming an infinite lot *** has been found that the number of items required for inspection decreases with an increase in some parameters.

关键词： General Weibull distribution sampling plans acceptance probability fuzzy plan

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On Relations for Moments of Generalized Order Statistics for Lindley–Weibull Distribution

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Computer Systems Science & Engineering 2022年第4期41卷 197-208页

作者： Faten A.Momen khan saman hanif shahbaz Muhammad Qaiser shahbaz Department of Statistics University of JeddahJeddahKingdom of Saudi Arabia Department of Statistics King Abdulaziz UniversityJeddahKingdom of Saudi Arabia

Moments of generalized order statistics appear in several areas of science and *** moments are useful in studying properties of the random variables which are arranged in increasing order of importance,for example,time to failure of a computer *** computation of these moments is sometimes very tedious and hence some algorithms are *** algorithm is to use a recursive method of computation of these moments and is very useful as it provides the basis to compute higher moments of generalized order statistics from the corresponding lower-order *** order statistics pro-vides several models of ordered data as a special *** moments of general-ized order statistics also provide moments of order statistics and record values as a special *** this research,the recurrence relations for single,product,inverse and ratio moments of generalized order statistics will be obtained for Lindley–Weibull *** relations will be helpful for obtained moments of gen-eralized order statistics from Lindley–Weibull distribution *** cases of the recurrence relations will also be *** characterizations of the distribution will also be obtained by using moments of generalized order *** relations for moments and characterizations can be used in differ-ent areas of computer sciences where data is arranged in increasing order.

关键词： Generalized order statistics Lindley–Weibull distribution recurrence relations moments

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Effects of cisplatin in combination with hyperthermia on biological characteristics of retroperitoneal liposarcoma

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Chinese Medical Journal 2021年第9期134卷 1110-1112页

作者： Gheng-Li Miao shahbaz hanif Lin Zhang Xiao-Bing Chen Mei Huang Shi-Bo Liu Cheng-Hua Luo Department of Retroperitoneal Tumor Surgery Peking University International HospitalBeijing 102206China Beijing Spanal Medical Scientific Co.Ltd. Beijing 102206China Molecular Diagnosis Laboratory Department of Regenerative MedicineAffiliated Hospital of Qingdao UniversityQingdaoShandong 266000China

Pathologically,retroperitoneal liposarcoma(RPLS)is a group of malignant tumors,which originates from adipose tissue in retroperitoneal space,accounting for almost 70%of all retroperitoneal *** has no optimal *** resection(R_(0)/R_(1))is the most effective therapy;however,recurrence rate is very *** incomplete surgical resection(R_(2))is an important risk factor for early recurrence of RPLS.

关键词： retroperitoneal sarcoma cisplatin

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A Regression Type Estimator with Two Auxiliary Variables for Two-Phase Sampling

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Open Journal of Statistics 2013年第2期3卷 74-78页

作者： Naqvi Hamad Muhammad hanif Najeeb Haider Department of Statistics Government Postgraduate College Dera Ghazi Khan Pakistan National College of Business Administration and Economics Lahore Pakistan

This paper is an extension of hanif, Hamad and shahbaz estimator [1] for two-phase sampling. The aim of this paper is to develop a regression type estimator with two auxiliary variables for two-phase sampling when we don’t have any type of information about auxiliary variables at population level. To avoid multi-collinearity, it is assumed that both auxiliary variables have minimum correlation. Mean square error and bias of proposed estimator in two-phase sampling is derived. Mean square error of proposed estimator shows an improvement over other well known estimators under the same case.

关键词： Mean Square Error Precision Two-Phase Sampling Auxiliary Variable Regression Type Estimator Simple Random Sampling without Replacement

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