البحث — المستودع الرقمي العراقي

نتائج البحث: 4 من أصل 4

متطلبات تصميم المنتوج باستخدام 6-sigma == product design REQUIREMENTS BY USING 6-sigma

اسم المؤلف: شذى مؤيد مهدي

اسم المشرف: مي جورج امين

الموضوع العام: هندسة الانتاج والمعادن والمواد

السنة: 2014

الموضوع الدقيق: الهندسة الصناعية

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

التقييم النوعي والكمي لمعولية مولد كهربائي == Qualitative and Quantatitive Reliability Assessment of Electrical Generator

اسم المؤلف: مريم غالب جليل علي

اسم المشرف: صالح جعفر فندي

الموضوع العام: هندسة الانتاج والمعادن والمواد

السنة: 2014

الموضوع الدقيق: الهندسة الصناعية

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

تطبيق نظام دعم القرار لانشطة الصيانة في مصفى الدورة == Application of A Decision Support System For Maintenance Activities In Al - Daura Oil Refinery

اسم المؤلف: مصطفى محمد علي منصور

اسم المشرف: لمياء محمد داود | لمى عدنان حميد

الموضوع العام: هندسة الانتاج والمعادن والمواد

السنة: 2014

الموضوع الدقيق: الهندسة الصناعية

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: في ھذا البحث تم دراسة انشطة الصيانة في معمل دھون 3 احد معامل الدھون في مصفى الدورة حيث تم اختيار ھذا المعمل كونھ الاحدث والاكثر انتاجية مقارنة مع المعملين الاخرين وتم اخذ بيانات انشطة الصيانة لمدة عشر اشھر متتاليھ من ايار 2012 ولغاية شباط 2013 علما ان وح | In this research maintenance activities in lube oil factory (3) of Daura refineries is investigated for ten consecutive months from May (2012) to February (2013).This factory is the newest and largest in its capacity compared with lube oil factory (1 and 2). Dewaxing unit produces the greater products compared with other production units in lube oil factory (3). The frequency of breakdowns and type of maintenance were identified, Pareto chart are used to analyze the collected data. Results indicated that %95 of breakdowns of different equipments (pumps, exchangers, compressors, docks, filters, furnaces and towers) are due to mechanical causes, the rest are related to electrical causes.Pareto chart highlights that the most frequent failure for both pumps and exchangers followed by compressors and other equipments of lube oil factory 3.Loss production cost due to maintenance activities was also conducted in this study so as to analyze different aspects of maintenance activities for lube oil factory (3).The total loss in production due to breakdown in the ten months of this study is (99 Billion ID). It is worth’s mentioning that pumps registered the highest losses of production cost due to bad maintenance. Accordingly, decision making for maintenance activities is a multiattribute and decision support system is crucial to signify priorities and definealternatives. ERGO (Latin word meaning "therefore" or Greek word meaning "work", used as a prefix ergo - , for example, in ergonomics and it is generalpurpose decision support system using 35 criterion to choose the best alternatives) is employed so as to evaluate detailed scope and the best of best alternatives. ERGO results indicated that Pumps are the best alternative offered to decision maker to conduct the necessary maintenance ERGO identifies the equipment with the most frequent breakdown indewaxing unit, which causes the greater loss in production cost. Compressors were identified as the highest frequency failure equipment(s). Combining two criteria (frequency of failure and lost production cost) reveals that pumps are the best alternative.

تقليل ضياعات القص في مشكلة قطع الخامات احادية البعد باستخدام نموذج برنامج جاهز == Trim Loss Minimization In One - Dimensional Cutting Stock Problem Using A Ready Software Model

اسم المؤلف: سلام قدوري داود

اسم المشرف: سوسن صبيح الزبيدي

الموضوع العام: هندسة الانتاج والمعادن والمواد

السنة: 2014

الموضوع الدقيق: الهندسة الصناعية

الدرجة: ماجستير

الجامعة: الجامعة التكنولوجية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

المستخلص: تعتبر مشكلة قص الخامات واحدة من المشاكـل العملية المهمـة، لذا ركز البحث على دراسة مشكلة قص الخامات احادية البعد بالتفصيل، حيث تم دراسة تصنيف وخصائص وطرق حل هذا النوع من المشاكل بالاضافـة الى اقتراح اسلـوب حـل مناسب لتقليل ضياعات القص الحاصلـة في بيئـة ا | Cutting stock problem is one of the important operation problems. The one dimensional cutting stock problem is considered as obvious problem which should be centered to be solved, so this thesis focuses on studying classification, characteristics and solution methods for this problem, in addition to suggest suitable approach for minimization of the trim losses in actual environment, as it is required to fulfill all of the small required items with different lengths and quantities by cutting the identical large objects which are available as stock. The variety of lengths and quantities of these small required items makes the problem obvious in complexity to fulfill all items with minimization of Integer Linear Programing (ILP) which is aided by Advanced Interactive Multidimensional Modeling System (AIMMS) software used to solve research problems. This software used because that getting of accurate details and speed results for waste amounts, number of used stocks, total and efficient cutting patterns that are generated to getoptimal solutions.Our study has been applied in an actual environment (housing project with 41 building units in Azezeiyah - Wasset) being carried out by Al - Mansour Company of Iraq Ministry of Construction and Housing, where the reinforcement steel (Rebar) with standard length is considered as a backbone component of building structure.These problems have been studied according to different rebar diameter (25 mm, 16 mm, 12 mm, and 10 mm), where each problem is subdivided and solved according to basic building activity designs (foundation, columns, beams, slabs, stairs, balcony, and front arch building entrance), trim losses which were resulting from certain activity design - diameter problem that have lengths longer than required item lengths in the next activity designs are stored and utilized to get optimal stock ratios. The utilization stock ratio which is resulting of suggested solution approach (ILP) for all these one dimensional cutting stock problems has reached (98.53%), while the utilization of used stock in that actual environment got by Al - Mansour Company is lower than this percentage.