MARC details
| 000 -LEADER |
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| fixed length control field |
05346namaa2200397 i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
OSt |
| 005 - أخر تعامل مع التسجيلة |
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| control field |
20241022111448.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
241019s2023 |||a|||f m||| 000 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Original cataloguing agency |
EG-GICUC |
| Language of cataloging |
eng |
| Transcribing agency |
EG-GICUC |
| Modifying agency |
EG-GICUC |
| Description conventions |
rda |
| 041 0# - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
eng |
| Language code of summary or abstract |
eng |
| -- |
ara |
| 049 ## - Acquisition Source |
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| Acquisition Source |
Deposite |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
519.5 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) |
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| Classification number |
519.5 |
| Edition number |
21 |
| 097 ## - Degree |
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| Degree |
M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) |
|---|
| Local Call Number |
Cai01.18.03.M.Sc.2023.Ma.E |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
|---|
| Authority record control number or standard number |
Mahmoud Shaaban Radwan Mohammed, |
| Preparation |
preparation. |
| 245 10 - TITLE STATEMENT |
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| Title |
Estimation problems for the truncated logistic distribution in case of censoring samples / |
| Remainder of title |
|
| Statement of responsibility, etc. |
by Mahmoud Shaaban Radwan Mohammed ; Supervised by Prof. Abd-Allah Mohamed Abdel-Fattah . |
| 246 15 - VARYING FORM OF TITLE |
|---|
| Title proper/short title |
/مشاكل التقدير للتوزيع اللوجيستي المبتور في حالة العينات المراقبة |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Date of production, publication, distribution, manufacture, or copyright notice |
2023. |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
75 pages : |
| Other physical details |
illustrations ; |
| Dimensions |
30 cm. + |
| Accompanying material |
CD. |
| 336 ## - CONTENT TYPE |
|---|
| Content type term |
text |
| Source |
rda content |
| 337 ## - MEDIA TYPE |
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| Media type term |
Unmediated |
| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
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| Carrier type term |
volume |
| Source |
rdacarrier |
| 502 ## - DISSERTATION NOTE |
|---|
| Dissertation note |
Thesis (M.Sc)-Cairo University, 2023. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Bibliography: pages 71-75. |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
The thesis discusses the estimation problem in SSPALT for truncated logistic distribution in case of censoring samples. We will design a lifetime model under step-stress partially accelerated life test (SSPALT) with type I and type II censoring assuming to the lifetime of the test items follows the truncated logistic distribution. The maximum likelihood method is used to estimate the acceleration factor and the parameters of distribution under consideration. <br/>The likelihood function of lifetime of the items is derived to obtain estimates for the acceleration factor and the parameters. The estimation procedure requires solving non-linear equations, so all estimation algorithms and numerical study will be performed using R-packages programming. The performance of MLEs is evaluated by the properties RABias, MSE and RE of the maximum likelihood estimates for model parameters. Also, the asymptotic variance-covariance matrix of the estimators is obtained. In addition, confidence interval for each parameter is given. <br/>From the simulation study, we noted that as the acceleration factor increases, MSE and RE decrease. Also, the asymptotic variance-covariance of estimates decreases as the sample size increases. In addition, the interval of the estimators decreases as the sample size increases. |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
في هذه الدراسة تم مناقشة مشاكل التقدير للتوزيع اللوجيستي المبتور في حالة العينات المراقبة باستخدام اختبارات الحياة المعجلة جزئيا ذو الضغط المرحلي SS-PALT، حيث تم استخدام طريقة الإمكان الأعظم Maximum Likelihood Method لتقدير معامل التعجيل Acceleration Factor ومعلمات التوزيع اللوجيستي المبتور حيث انه تم افتراض ان بيانات الفشل Failure Data تتبع هذا التوزيع، ويتم التقدير في حالة العينات المراقبة من النوع الأول Type I censoring sample والعينات المراقبة من النوع الثاني Type II censoring sample.<br/>وتم اشتقاق دالة الامكان الاعظم للتوزيع اللوجيستي المبتور في حالتي عينات المراقبة وذلك للحصول على تقديرات لمعامل التعجيل وكذلك معلمات التوزيع، ونظرا لمشاكل التقدير المتمثلة في صعوبة حل المعادلات المعقدة رياضيا للوصول الى التقديرات فقد تم تقديم دراسة عددية باستخدام برنامج R ، وتم الحصول على تقديرات وقياس مدى اداءها، أيضا تم الحصول على مصفوفة التباين-التغاير Asymptotic Variance-Covariance Matrix للمقدرات. واخيرا تم تقدير فترة ثقة للمعلمات عند مستوى ثقة 95% و 99%.<br/>واظهرت نتائج تجارب المحاكاه انه مع زيادة معامل التعجيل (β) يقل متوسط مربعات الاخطاء MSE للمقدرات وكذلك الخطأ النسبي RE لها. و كلما زاد حجم العينة يقل التحيز النسبي المطلق RABias ومتوسط مربعات الاخطاء MSE. أيضا تقل قيمة التباينات والتغاير بين المقدرات مع زيادة حجم العينة وتقل أيضا طول فترة الثقة المكونة للمعلمات. |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE |
|---|
| Issues CD |
Issues also as CD. |
| 546 ## - LANGUAGE NOTE |
|---|
| Text Language |
Text in English and abstract in Arabic & English. |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Mathematical Statistics |
| Source of heading or term |
qrmak |
| 653 #0 - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
Logistic Distribution |
| -- |
Truncated Logistic Distribution |
| -- |
Truncated Distributions |
| -- |
Maximum Likelihood Estimation (MLE) |
| -- |
Life Tests |
| -- |
Accelerated Life Tests (ALT) |
| -- |
Step Stress Partially Accelerated Life Tests (SSPALT) |
| -- |
Censoring Samples |
| -- |
Type I Censoring Samples |
| -- |
Type II Censoring Samples |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Abd-Allah Mohamed Abdel-Fattah |
| Relator term |
thesis advisor. |
| 900 ## - Thesis Information |
|---|
| Grant date |
01-01-2023 |
| Supervisory body |
Abd-Allah Mohamed Abdel-Fattah |
| Universities |
Cairo University |
| Faculties |
Faculty of Graduate Studies for Statistical Research |
| Department |
Department of Mathematical Statistics |
| 905 ## - Cataloger and Reviser Names |
|---|
| Cataloger Name |
Shimaa |
| Reviser Names |
Huda |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Thesis |
| Edition |
21 |
| Suppress in OPAC |
No |
