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تصميم نموذج دعم قرار الاستبدال باستعمال المحاكاة

        تظهر الحاجة إلى الاستثمارات الرأسمالية من عدة مصادر كالحاجة إلى توسيع المنشآت الإنتاجية ، أو استجابة لحاجات المجتمع كشراء مكائن ومعدات لتخفيض تلوث الماء والهواء. أما أهم مصادر الحاجة لرؤوس الأموال فإنها تأتي من الموجودات الإنتاجية (باستثناء الأرض) ، حيث تستهلك هذه الموجودات (المكائن والآلات والعُدد) بشكل مستمر جراء الاستخدام ، فالمكائن، مثلا ، تسير دائما في طريقها نحو أكوام الخردة والبعض الآخر منها يصل إلى نهاية عمره الإنتاجي في نهاية كل سنة ، وأحيانا تصل الموجودات الإنتاجية إلى نهاية الطريق بسبب التقادم على الرغم من كونها صالحة للعمل ومن الأمثلة على ذلك الحواسيب الشخصية التي تتقادم بسرعة.

        إن أولى الأسبقيات التي تتطلب الحجم الأكبر من الاستثمارات الرأسمالية هي الحاجة لاستمرار عمل منشات الإنتاج (في قطاعي الصناعة والخدمات) بشكل كفوء ، فالموجودات الإنتاجية يمكن صيانتها أو استبدالها وبقدر تعلق الحاجة إلى رؤوس الأموال فان استبدال الموجودات يتطلب الجزء الأكبر من رؤوس الأموال المتاحة للشركة ، ولا تستهلك الموجودات الإنتاجية بأكملها مرة واحدة لان هذه الحالة لو تحققت فيكون من السهل معرفة تاريخ استبدالها ولكن بالمقابل تتضمن العديد من قرارات إدارة العمليات استثمار رؤوس أموال كبيرة ومن الأمثلة على ذلك توسيع الطاقة وإعادة الترتيب الداخلي والتكامل العمودي والأتمتة وتنصيب نظام خزين محوسب واستبدال تقنيات الإنتاج...... وغيرها.  ويستلزم الاستثمار في عمليات الاستبدال تعاون وظيفي متعدد Cross-Functional Coordination وبالأخص مع وظيفتي المالية والمحاسبة، إذ إن مثل هذه الاستثمارات المالية ينبغي أن تنسجم مع الخطط والقدرات المالية للشركة. فضلا عن ذلك ينبغي إخضاع الاستثمار في استبدال الموجودات الإنتاجية إلى واحد أو أكثر من أدوات التحليل لتثمين أو لتقييم اهميتها نسبة إلى البدائل المتاحة أمام الشركة.

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Publication Date
Mon Jan 01 2018
Journal Name
Al–bahith Al–a'alami
The Communicative Integration in New Media: Building a Communicative Model

The internet, unlike other traditional means of communication, has a flexibility to stimulate the user and allows him to develop it. Perhaps, the reason for the superiority of the internet over other traditional means of communication is the possibility of change and transmission from one stage to another in a short period. This means that the internet is able to move from the use to the development of the use and then the development of means and innovation as the innovation of the internet is a logical product of the interaction of the user with the network. The internet invests all the proposals and ideas and does not ignore any even if it is simple. This is represented in social networking sites which in fact reflects personal emotio

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Publication Date
Sun Feb 28 2021
Journal Name
Journal Of Economics And Administrative Sciences
Using jack knife to estimation logistic regression model for Breast cancer disease

 

It is considered as one of the statistical methods used to describe and estimate the relationship between randomness (Y) and explanatory variables (X). The second is the homogeneity of the variance, in which the dependent variable is a binary response takes two values  (One when a specific event occurred and zero when that event did not happen) such as (injured and uninjured, married and unmarried) and that a large number of explanatory variables led to the emergence of the problem of linear multiplicity that makes the estimates inaccurate, and the method of greatest possibility and the method of declination of the letter was used in estimating A double-response logistic regression model by adopting the Jackna

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Publication Date
Fri Jul 01 2016
Journal Name
Journal Of Economics And Administrative Sciences
Determine the best model to predict the consumption of electric energy in the southern region

Abstract:          

                Interest in the topic of prediction has increased in recent years and appeared modern methods such as Artificial Neural Networks models, if these methods are able to learn and adapt self with any model, and does not require assumptions on the nature of the time series. On the other hand, the methods currently used to predict the classic method such as Box-Jenkins may be difficult to diagnose chain and modeling because they assume strict conditions.

  

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Publication Date
Mon Jan 07 2019
Journal Name
Arab Science Heritage Journal
تصميم عدسة كهروستاتيكية ثلاثية الأقطاب بطريقة كثافة الشحنة

        تركز هذا البحث على تصميم عدسة كهروستاتيكية ثلاثية الاقطاب اسطوانية الشكل متحدة المركز ومفصولة  بفتحة هوائية . تم حل معادلة لابلاس بطريقة كثافة الشحنة في مجال بصريات الجسيمات المشحونة  اللانسبية وبغياب تأثيرات شحنة الفضاء إن توزيع الجهد المحوري لعدسة ثلاثية كهروستاتيكية تم حسابه باستخدام كثافة الشحنة الموزعة على الاقطاب، الناتجة من تسليط فولتية معينة على الاقطاب اعتمادا على ق

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Publication Date
Thu Mar 01 2007
Journal Name
Al-khwarizmi Engineering Journal
Design and Analysis of New Prosthetic Foot.

There is a variety of artificial foot designs variable for use with prosthetic legs . Most of the design can be divided into two classes, articulated and non-articulated feet. one common non-articulated foot is the SACH . The solid ankle cushion heel foot referred to as the SACH foot has a rigid keel .

One key or the key factor in designing a new prosthesis is in the analysis of a patients response .

 This view is the most important because if the foot does not provide functional , practical or cosmetically acceptable characteristics the patient will not feel comfortable with the prosthesis , therefore design and manufacturing a new foot is essential, this foot made from polyethylene, its different shape and characte

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Publication Date
Tue Aug 15 2023
Journal Name
Al-academy
The Aestheticof Balance And Its Relationship To The Design of The Industrial Product Shape

The study tagged: (The aesthetics of balance and its relationship to the design of the body of the industrial product) discussed the role of balance in the design of industrial products of different shapes, colors and sizes, as well as their function. Based on the research problem that was determined by the following question: What is the relationship between balance and the design of the body of the industrial product? The aim of the research is to: reveal the statement of the effectiveness of the balance in the design of the industrial product body.
The study was defined in four chapters: in the first chapter, a problem, the importance, and the aim of the research were presented. The second chapter contained the theoretical framewor

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Publication Date
Tue Mar 01 2016
Journal Name
Al-academy
Metaphor in product design: قيس والي عباس

Addresses current research to the subject of metaphor as a field important in the design of industrial product, so it was a problem search: Does industrial product which is designed mainly to reflect the principle of metaphor role in receiving, and how the application of mechanisms theory correct as stipulated in institutions metaphor properly for this orientation in achieving those metaphors. What are the relations of reciprocity that influenced the establishment of the design and construction of the system for industrial product, the objectives of the research were standing on the interactive nature of the relations between the metaphor and the process of industrial product design? And identify strengths and weaknesses in the processes

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Publication Date
Tue Mar 12 2019
Journal Name
Al-khwarizmi Engineering Journal
Die Design of Flexible Multi-Point Forming Process

Multi-point forming (MPF) is an advanced flexible manufacture technology, and the technology results from the idea that the whole die is separated into small punches that can be adjusted height. This idea is applied to the traditional rigid blank-holder, so flexible blank-holder (FBH) idea can be obtained. In this work, the performance of a multi-point die is investigated with pins in square matrix and suitable blank holder. Each pin in the punch holder can be a significant moved according to the die high and at different load that applied with spring with respect to spring stiffness. The results shows the reduction in setting time with respect to traditional single point incremental forming process that lead to (90%). and also show duri

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Publication Date
Thu Dec 15 2022
Journal Name
Al-academy
Philosophy of values and its epistemological representations in industrial product design

The research dealt with the concepts of the philosophy of values ​​and its epistemological variables according to specific propositions represented in their scientific approaches to value theory in the field of industrial design. As the epistemological propositions of the theory of values ​​were dealt with based on the epistemological fields that dealt with the concept and what values ​​are, starting with the modernist propositions and postmodern, passing through the propositions of sociological and psychological thought, which was a prelude to extracting the concepts of value theory and adopting it in the field of industrial product design. The epistemological approaches to value theory in industrial product design were repr

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Publication Date
Mon Jan 02 2017
Journal Name
Al-academy
Style and the jump in industrial product design - a comparative study

Find cares studying ways in the development of industrial products and designs: the way the progressive development (how typical) and root development (jump design), was the aim of the research: to determine the effectiveness of the pattern and the jump in the development of designs and industrial products. After a process of analysis of a sample of research and two models of contemporary household electrical appliances, it was reached a set of findings and conclusions including:1-leaping designs changed a lot of entrenched perceptions of the user on how the product works and its use and the size and shape of the product, revealing him about the possibilities of sophisticated relationships with the product, while keeping the typical desi

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