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Register a new userThe optimization of the thermal field for different models of roof's brick
اختيار الأداء الحراري الأمثل لنماذج مختلفة من الهوردي
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نركز في هذا البحث على أنواع الهوردي المستخدم في البناء و نقارن حراريا بشكل نظري بين أشكاله المختلفة الموجودة في السوق المحلية, و أخيرا سنقترح شكل جديد للهوردي بشكل يؤمن العزل الأمثل دون الزيادة في الوزن.
In this paper, we will focus on the types of roof’s brick used in construction and theoretically compare thermally between different kinds in the local market, and finally we will propose a new form of roof’s brick give the optimal insulation without increasing the weight.
References used
Li Ju1995-Basics of thermal conductivity calculation. Massachusetts Institute of Technology
SCTP 2000 ,Règlementation thermique en France
TERRY ,M 2004- Thermal conductivity, theory, properties, and applications. Kluwer Academic,306p
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في المشكلة التي نعالجها, تحتاج شركة اتصالات إلى بناء مجموعة من الأبراج الخلوية لتوفير خدمة الاتصالات الخليوية للسكان في منطقة جغرافية. تم تحديد عدد من المواقع المحتملة لبناء الأبراج. يعتم اختيار هذه المواقع على عدة عوامل ، بما في ذلك مدى اتساق البرج
مع البيئة المحيطة وارتفاع التضاريس, تتمتع الأبراج بمدى تغطية ثابت ، وبسبب قيود الميزانية ، لا يمكن بناء سوى عدد محدود منها . بالنظر إلى هذه القيود ، ترغب الشركة في توفير تغطية لأكبر قدر ممكن من السكان, والهدف هو اختيار في أي من المواقع المحتملة يجب أن تقوم الشركة ببناء الأبراج.
إن المشكلة التي شرحناها يمكن نمذجتها لتصبح أحد أمثلة مشكلة 0/1 knapsack الشهيرة لذلك شرحنا في الحلقة مفهوم مشكلة 0/1 Knapsack والطرق المستخدمة في الحل, وتوسعنا في الشرح عن خوارزمية Branch and Bound كونها تعتبر أفضلها.
This work represent synthesis of new benzoxazines polymers based on
either phenol or hydroquinone as a phenolic compounds and para
aminophenol as primary amine and paraformaldehyde.
The current recipe for better model performance within NLP is to increase model size and training data. While it gives us models with increasingly impressive results, it also makes it more difficult to train and deploy state-of-the-art models for NLP
due to increasing computational costs. Model compression is a field of research that aims to alleviate this problem. The field encompasses different methods that aim to preserve the performance of a model while decreasing the size of it. One such method is knowledge distillation. In this article, we investigate the effect of knowledge distillation for named entity recognition models in Swedish. We show that while some sequence tagging models benefit from knowledge distillation, not all models do. This prompts us to ask questions about in which situations and for which models knowledge distillation is beneficial. We also reason about the effect of knowledge distillation on computational costs.
The thermal exchangers are widely used in the power generating stations and many
refrigeration systems. Activity in the thermal cycle depends on its design and real
calculations.
The aim of our present work, is to find an ideal calculation method
of the working
exchangers parameters and evaluating the used technical engineering soluting.
We discussed the ideal chosen problems and the affecting parameters, and used a
calculating design for a thermal exchanger in the heating and feeding with hot water,
considering these parameters. The proposed designing benefit, could be evaluated from the
final indication that could be expressed by real palpable material.
We found that the ideal parameters choosing could clearly descrese the preparation
costs the heat exchanger blank – form by three times and give full clear proposed
calculation method of all the parameters and its exchanging. This could save of the best
exchanging possibility chosen from the different exchanger.
Thermal energy can be stored as a latent heat in building structures
by materials with low phase change temperature called phase
change materials (PCM).
In this paper, an analytical and mathematical study of the PCM
wallboards was done by simulat
e its thermal behavior, depending on
governing heat transfer equations which describe the phase change
process of the PCM wallboard.
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