البحث — المستودع الرقمي العراقي

نتائج البحث: 13 من أصل 13

النمذجة الحركية والتكهن لمعدلات النمو لمرضى السرطان في محافظة نينوى باسلوب بيز == Dynamic Modelling and Forecasting of Growth Means of Cancer Patients in Nineveh Governorate by Bayesian Approach

اسم المؤلف: اسماء ايوب يعقوب

اسم المشرف: ريا سالم محمدعلي الرسام

الموضوع العام: علوم الرياضيات

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة الموصل - كلية علوم الحاسبات والرياضيات

اللغة: العربية

مكان الجامعة: الموصل

بناء النماذج الطوابير مع التطبيق في مصرف الرشيد في السليمانية

اسم المؤلف: كوسار محمود حسن

اسم المشرف: محمد محمود فقي

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة السليمانية - كلية الادارة والاقتصاد - قسم الاحصاء

اللغة: الانكليزية

مكان الجامعة: السليمانية

الصفحات الاولى:

مقارنة مقدرات بيز لدالة المعولية لانموذج ويبل للفشل باستعمال دوال خسارة مختلفة مع تطبيق عملي == A Comparison of Bayes Estimators For Reliability Function of Weibull Failure Model By Using Different Loss Functions With Practical Application

اسم المؤلف: صبا صباح احمد الجميلي

اسم المشرف: لميعة باقر جواد الجواد

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: دكتوراه

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: Weibull failure model considered being one of the well known failure models because of its different applications in addition to its importance in the reliability field and life tests.This thesis focused on a comparison of standard Bayes estimators for reliability function of the two parameters Weibull distribution by usingsix different loss functions, three of them have been suggested by the researcher.And for that, the methodology of this thesis depended on the following methodologies : - First : - Theoretical study, the standard Bayesian estimations has been derivatives elaborately to reach the Bayes estimators forms for the reliability function of Weibull distribution by using symmetric and asymmetric loss functions which been explained elaborately, and these are quadratic loss function, logarithm loss function and precautionary loss function to reach to the standard Bayes estimators which called quadratic Bayes estimator (QB), logarithmic Bayes estimator (LB) and precautionary Bayes estimator (PB)) respectively. And those loss functions have been Modified by suggested three modified loss functions counterpart to the functions above to reach proposed estimators which called (modified quadratic Bayes estimator (MQB), modified logarithmic Bayes estimator (MLB) and modified precautionary Bayes estimator (MPB)) respectively.Second : - Experimental study by designing number of simulation experiments using various values of parameters and sample sizes, and with repetition of (10000) times for the comparison among the estimators and by using the mean square error (MSE) to reach efficient estimators with minimum variance. And a collection of real negative and positive values have been tried for the constant which is used in proposed loss functions to reach the best value may used in the comparison, and then a comparison between the six preference estimators is done to show which estimator is the most accurate to be used for estimation the reliability function of Weibull failure model, and best results have been obtained from those simulation experiments.The results of these experiments showed that the modified precautionary Bayes estimator (MPB) is the best for the reliability function of Weibull failure model than the other estimators which have been used in this thesis, and the second best method is the modified logarithmic Bayes estimator (MLB), and after that the precautionary Bayes estimator (PB) and then the modified quadratic Bayes estimator (MQB), also all proposed estimators are better than the logarithmic Bayesestimator (LB) and the quadratic Bayes estimator (QB) which results not to be shown in preferences.Also the results of these experiments show that every proposed estimator is better than its known counterpart.Third : - Application study by taking the best Bayesian estimator in the simulation experiments which is the proposed modified precautionary Bayes estimator (MPB) and applied practically on two experimental real data from WeatherFord company for oil well digging in the Bazergan area of Misan governorate which are represented by the time to failure of the operation of the drilling fluid pumps.From all above, the most important conclusions and recommendations have been offered from the results of this thesis as a specific contribution in the reliability field.

طرائق تقدير معلمات الانموذج المختلط الخطي الطبيعي الملتوي في حالة القياسات المكررة مع تطبيق عملي == Method of Estimating Parameters of The Skew - Normal Linear Mixed Model In The Case of Repeated Measures With Practical Application

اسم المؤلف: هند وليد عبد الرحمن الجبوري

اسم المشرف: محمود مهدي حسن البياتي

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: دكتوراه

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: تم في هذا البحث دراسة احد اهم النماذج الواسعة الاستعمال والتطبيق في تحليل البيانات التي تتصف بكون المشاهدات فيها تاخذ شكل قياسات مكررة Repeated Measures والذي يعد تعميم للانموذج المختلط الخطي (LMM) في حالة عدم تحقق الطبيعية Normality، وهو الانموذج المختل | In this research, the one of the most important widely used and application model was studied in analysis the data which are described by the observations take repeated measures form, which regarded as generalization of Linear Mixed Model (LMM) in the case of the lack normality, it is the Skew - Normal Linear Mixed Model (SN - LMM), which widely used to analysis the longitudinal data that characterized by the observations take repeated measures form and correlated among of them, this model express of these correlations by the random effect, it also achieved normality through the assumption that the data are distributed multivariate skew normal distribution.Also the research is concerned with the multivariate skew distribution generally and multivariate skew normal distribution specially with addressing the importance and used of these distributions, then dealing with the Skew - Normal Linear Mixed Model (SN - LMM) from its importance, used, properties, modeling, and parameters estimation methods Three important method are used for estimation the fixed effect parameters, random effect parameters and skewness parameters, in addition a proposed method by researcher, these methods are : 1) Maximum likelihood (ML) Method.2) Restricted Maximum Likelihood (RML) Method.3) Bayes Method.4) Proposed Method.A comparison among the best of these methods is made in the application aspect which contained the practical application on two clinical experiment including two samples of diabetic patients data, Who were given a new drug, the data of two samples are represent the repeated monthly measures for the level of sugar and some other variables which are taken for patient from the beginning of the experiment, after three months , and after six months from start to give them the new drug, in aim to study the effect of age and sex, which represented the fixed effect, also the visits times, that the repeated monthly measures are taken in these visits for the sugar level and other variables which represented the random effect, the comparison among the best method are held by using statistical standard the Mean Square Error (MSE), it was found in general that the proposed method is the best to estimate the fixed effects because of its lower mean square error compared to other methods, and the Bayes method is the best among these method to estimate the random effect and random errors because of its lower mean square error compared to other methods.

تقدير الفعالية النسبية لانموذج القطع المكافئ في تجارب نسبة الميل لقياس تاثير زيتي الزعتر والكتان على الوزن == Estimation of Relative Potency For Parabolic Model In Slope Ratio Assays To Measure Effect of Thyme And Flax Oils On Weight

اسم المؤلف: نضال بهجت محي الحيالي

اسم المشرف: قيس سبع خماس

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

التحليل الجيبي المتقطع والمويجي المتقطع واستخدامهما في عمليات الاخفاء للصوت والصورة == Discrete Cosine Transform & Discrete Wavelet Transform In The Hiding Process For The Speech And The Image

اسم المؤلف: ليلى مطر ناصر المحنة

اسم المشرف: خميس عواد زيدان

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: دكتوراه

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: للاهمية المتزايدة للتحويلات الرياضية ومدى مساهمتها في حل العديد من المشاكل العلمية، وكذلك موضوع الاخفاء steganography، الذي اخذ مفهومة يتطور واستخدامه يتزايد يوما بعد يوم لما له من اهمية كبيرة في توفير الحصانة والسرية للبيانات الرقمية لاي وسط كانت وكذلك | Because of the increasing of importance of the Mathematical transformation and its solutions for the scientific problems, and also. The steganography which it is develop ,more and more, with its expanding in performing security and Robustness for the digital data for any media and for decreasing the capacity of the Storage and increasing the speed in transmitting and receiving, we use in this thesis the discrete cosine transform and the discrete wavelet transform as a comparative study through the hiding methods, which its applied in the time domain and frequency domain, and applied the statistical term MSE which is always used for comparative, and added another term MAPE as a support term and then calculate the PSNR to measure the quality for the images and sounds after reconstruction depending on the two terms, the colored image are applied because of its high specifications for its large area in the storage through hiding processes, which its depend on the (LSB) method of hiding. And in this thesis it is proposed a methods for designing new coefficients depending on the filters Haar and DB - 4, and the design depended on a mathematical and logical methods, and as an application for the comparative and proposed methods it depended on a sample of (24) persons which we took their images and speeches to apply the Process by hiding the speech through the image for every person, and then applied the transformations depending on the proposed Algorithms, the program is designed by the researcher using Matlab language, and then the comparative applied between the used methods which showed high quality in reconstruction and performed a proposed methods in the security depending on the mathematical transform and not only on the methods of cyphering for data through hiding and this methods for cyphering the mathematical transform give a high robustness for hiding data.

تحليل التباين المركب لمجموعة تجارب متشابهة في القطاع الزراعي == Combind Analysis of Variance For Similar Experiments Group In The Agricultural Sector

اسم المؤلف: كاظم يحيى عبد الحسين

اسم المشرف: كمال علوان خلف المشهداني

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: the interaction (treatments X locations , treatments X years , 1. In the statistical sight, the aim is to test the significance of of this method of analysis is : in more than one location and in more than one year too. The aimreplicated in more than one location or period (year) or replicated sector. It means making analysis of variance for experiments that important in different sides of the life, specially in the agricultural The combined analysis of variance method is regarded as a verytreatments X locations X years ). plot experiment that conducted by (CRD , LSD) expanding by the researcher the case of (CRD , LSD) and Split - (RCBD , and Split - plot by RCBD), The study also include The combined analysis of variance was studied for the designsmost suitable environment conditions. true decision that represented by planting the type in the (included locations and agricultural seasons) , then making a many types of a pointed plant for environment conditions2. In agricultural sight , the aim is to test the suitability of experiment increase. that appeared as the value of decrease, the accuracy of the ,one for LSD and the other for Split - plot using LSD. The results using simulation manner and writing two programs for this aimconducted by LSD and by Split - plot using LSD , that led to Because of there is no available data for actually experiments appeared the significant effects.means of the factors and for the means of the interactions that them, the multiple comparisons were done (using Lsd) for the for the significance of the factors and for the interactions between A different results were appeared from experiment to anotherwas done by using Genstat program. homogeneity of variances using statgraph program, the analysis conducted by RCBD, and then after making Bartlett test for conducted by RCBD and another experiments by Split - plot In applications we have got the data of actually experiments

مقارنة بين اسلوب بيز وطريقة الامكان الاعظم لتقدير دالة المعولية للنظام المتسلسل والنظام المتوازي مع تطبيق عملي == A Comparison Between Bayes Approach And Maximum Likelihood Method To Estimate Reliability Function For Series System And Parallel System With Application

اسم المؤلف: علي حميد يوسف السراي

اسم المشرف: صباح هادي عبود الجاسم

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: نتيجة لتطور التقنية العالية والمنافسة الشديدة في القطاع الصناعي فان دراسة المعولية كانت الموضوع لدى الخبراء الاحصائيين بالاضافة الى مهندسو المعولية، لما لها من جانب كبير من الاهمية في حياتنا العملية، وحيث ان معرفة حالات عطل او فشل الانظمة شانه تقليل كلفة | In the theoretical part of this thesis, estimators of reliability function were derived for (series system) and estimators of reliability function for (Parallel system) as well as assumption that the life times of the components form every system is independent and is distributed into exponential distribution with different ` and independent parameters it can be shown as : First : Maximum Likelihood Estimator Second : Bayes Estimator By using squared error loss function and suggested loss function with taking into consideration finding common Prior probability function for random parameters according to researcher Jeffry also density Prior probability that is natural Conjugate that was not discussed in the references of the subject matter of the research. It is very important to refer that the derivation of Bayes estimators to reliability of parallel system were done by the researcher himself for the derivation could not be found in the references of the research which the researcher consulted for making comparison between the suitability of the estimations Monte Carlo stimulation style was used with two statistic measures (MSE) and(MAPE) for determination of the suitable estimator it is concluded that Best estimator by using suggested loss function and Prior density probability function natural Conjugate and so Best estimator using suggested loss function and non informative Prior probability Function.Finally in the practical part of the thesis the results of the theoretical part are wed to estimate reliability of Series System and parallel system in the AL - Kut Texture Factory which is belongs to the general company of texture industry is Wassit

طرائـــق بيــز فــي تحليــل نمــوذج القياس الاقتصادي المكاني مع تطبيق عملي == Bayes Methods In Analyzing Spatial Econometrics Model With Practical Application

اسم المؤلف: سامي غني خضير عطره

اسم المشرف: خالد ضاري عباس الطائي

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: دكتوراه

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: ان الخاصية الاساسية لتمييز البيانات المكانية عن بيانات السلاسل الزمنية هي الترتيب المكاني للمشاهدات , وعينات البيانات المكانية تمثل مشاهدات ترتبط بنقاط او مواقع وتتميز هذه البيانات بان ارتباطها يضعف كلما بعدت المسافة وكذلك تتميز بتدرج المكان (( المناطقية | The main property to differentiate the spatial data from time series data is the spatial arrangement of observations and the samples of spatial data represent observations related to points or locations these data are distinguished with the weakness of their connection each time the distance getting far away and the place graduation (location)on the spatial relations of observations are represented in matrix named spatial weights matrix. The spatial econometrics is used in following up the spatial effects like the spatial dependence of observations in different points of place, and spatial heterogeneity arising from relations or parameters model that change with sample data in each time we move within the place , those two points have been neglected in traditional econometrics because of their sinconsistency of statistical assumptions and when taking those spatial effects into consideration ,the statistical influence will be of high efficiency. On the contrary, ignoring these effects will lead to loss the information and will not be as efficient as the dependant sample.Because of the difficulty of deriving the posterior function (on which the Bayesian inference depends) up on applying the Bayesian methods especially in cases that the number of probable models is very large as computing the posterior functions for all these samples requires integration for large dimensions functions which is very difficult Mathematically or inapplicable that requires proper methods can deal with such cases like Gibbs and Metropolis - Hastings sampling by analyzing the posterior distribution to number of conditional distributions for each parameter in the model and then the simplicity of inference for each parameter in the model.The matrix of spatial weights is built by registering the contiguity relations for each location with others in a matrix row (w?) and given (1) if there is a relation between two locations (wij=1) and zero, if it doesn’t (wij=0)as i and j refer to the rows and columns in sequence. For making the summation of each row in the matrix w? equal to 1 , the elements of matrix will be calculated according to the proportion : wij/ ?wij and i=1,2…,n j=1 Consequently, we will get the adjusted matrix W.The practical side was focused on the counting of spatial autoregressive model parameters, and these parameters is the vector ? and it is an ordinary regression parameters vector, and error variance parameter (?2) , and the most important of them is a countig of the parameter (?) which is represent spatial dependance parameter.In order to show the role of the spatial, the practical side included taking the real population for childrens between(1 - 19) year, that had iron deficiency anemia (due to from iron deficiency) that admitted to children’s hospitals in Kurkh district of Baghdad (which had been divided into five geographic regions) for 2010. We have suggested that computing the elements in the adjusted matrix to be on basis of the actual length proportion of the joint borders among different locations that lead to get the accurate estimated value of spatial dependence parameter، where value result of spatial dependence parameter (?) was (0.43) when use Metropolis - Hastings sampling method while value of this parameter when use spatial outoregressive function and by using the adjusted matrix was( 0.57) and value of this parameter when use the same regression function but by using the suggested matrix was (0.85).

ايجاد التوزيع الثنائي المشترك باعتماد دوال رابطة مختلفة مع تطبيق في المجال الحيوي == Finding Bivirate Distribution By Using Different Copula'S Functions With Application In Biotical Field

اسم المؤلف: اسماعيل هادي جلوب

اسم المشرف: ضوية سلمان حسن الجنابي

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: دكتوراه

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

مقارنة بعض المقدرات شبه المعلميه لتقدير دالة استهلاك الطاقة الكهربائية لمدينة بغداد == A Comparison of Some Semiparametric Estimators For Consumption Function Estimation of Electricity Energy For Baghdad City

اسم المؤلف: اسيل مسلم عيسى

اسم المشرف: مناف يوسف حمود

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

استخدام المقدرات الحصينة في التحليل العنقودي مع تطبيق عملي في مجال الفساد الاداري والمالي == Robust Estimations of Cluster Analysis : Practical Application in Administrative and Financial Corruption

اسم المؤلف: منال اسماعيل خليل

اسم المشرف: لقاء علي محمد العلوي

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى:

مقارنة بعض طرائق تقدير معلماث توزيع كمبل للقيمت المتطرفت العظمى باستخدام المحاكاة مع تطبيق عملي على العواصف الغباريت == Comparing Some estimation Methods for max Gumbel Distribution by simulation with a Practical Application on Dust Storms

اسم المؤلف: زينب علي عبد الحسين

اسم المشرف: نزار مصطفى جواد الصراف

الموضوع العام: الادارة والاقتصاد

السنة: 2011

الموضوع الدقيق: الاحصاء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: العربية

مكان الجامعة: بغداد

الصفحات الاولى: