هیدروفرمینگ لوله به‌طور گسترده، در تولید قطعات ساختاری اتومبیل استفاده می‌شود. یکی از خصوصیات تولید‌شده با این فرایند، نسبت استحکام به وزن بالا می‌باشد. لولۀ فشار پایین، روش‌های پیشنهاد‌شده برای حل مشکلات قبیل نیاز بالای سیال و آب‌بندی روش انجام پایین لوله، شبیه فشردن جسم جامد است آن برخلاف بالا، قالب بالایی طول فرایند ثابت نبوده هم‌زمان اعمال داخلی حرکت کرده را تحت قرار می‌دهد. مقاله، لوله‌های...

This paper investigates the use of femtocell as a solution to improve indoor coverage and off-load mobile data indoors on the macro cellular networks. Specifically, the article deals with a performance analysis of femtocell in an indoor cellular network. This is achieved by designing and modelling femto-cell network in an indoor cellular network using OPNET modelling and simulation software. Th...

Most EAI tools facilitate the integration of several application services to implement a designed workflow process. The individual application systems are coordinated by a workflow-driven broker-server that integrates the system through web-service technologies such as SOAP and XML. This paper describes a performance-evaluation methodology that we have developed for the analysis of such integra...

Multi-hop ad-hoc networks suffer from the presence of hidden and exposed nodes that diminish aggregate network throughput. While there are various approaches to mitigating these problems, in this work we focus exclusively on the role of physical carrier sensing (PCS). Specifically, tuning the PCS threshold leads to a trade-off between the ‘exposed’ and ‘hidden’ areas. The contributions of this ...

Satellite communications system uses various satellites to transmit radio signals between earth terminals. A typical operational link includes an active satellite and two or more earth terminals. Satellite communication is one of the significant factor from the space programs and has made a major contribution to the international communication. There are various types of information that can be...

The need for coupling Heterogeneous Wireless Networks (HWNs) such as WLAN, WiMAX or UMTS, play a great role in developing towards fourth generation of wireless networks. Hence, the algorithms for these networks must be developed especially handoff algorithms to present a better performance in such heterogeneous networks. In this paper, several projects have different types of networks were impl...