Progress in Noise Control

Progress in direct noise computation

The needs for accurate and efficient numerical solvers in computational aeroacoustics have motivated the development of low-dispersion and low-dissipation schemes as an alternative to more classical methods of applied mathematics for computational fluid mechanics over the last two decades. These numerical methods have now reached maturity, even if progress is still necessary to take account of ...

emittance control in high power linacs

چکیده این پایان نامه به بررسی اثر سیم پیچ مغناطیسی و کاوه یِ خوشه گر با بسامد رادیویی بر هاله و بیرونگراییِ باریکه هایِ پیوسته و خوشه ایِ ذرات باردار در شتابدهنده های خطیِ یونی، پروتونی با جریان بالا می پردازد و راه حل هایی برای بهینه نگهداشتن این کمیتها ارایه می دهد. بیرونگرایی یکی از کمیتهای اساسی باریکه هایِ ذرات باردار در شتابدهنده ها است که تاثیر قابل توجهی بر قیمت، هزینه و کاراییِ هر شتابدهند...

Active Noise Control in Pardis Coach using Different Fuzzy Controllers

In recent years, need to increase the convenience of trips in railway vehicles causes that train operators and manufacturers focus on reducing the noise level which is sensed by passengers. In this paper, first the state of modeling acoustic noise in cab train is discussed and natural frequencies and acoustic mode shapes are derived and then formulation of acoustic pressure in the cab will be o...

Progress in control of haemorrhagic septicaemia (Pasteurellosis) in cattle in Iran

COVID- 19: disease, progress, control and their relation with sex

Worldwide epidemic had a specific role on human health and economic; Corona, for example, as a huge pandemic had an expand effect on human health, social relation, economic, politic and environment with severe respiratory disorder and high mortality rate in the world. Due to importance of SARS-Cov-2, the present paper deals with the route of transmission, their relation with sex, prevention and...