Problems on “Cleaning Agents” and “Detergents”
نویسندگان
چکیده
منابع مشابه
the effect of some detergents and stabilizing agents on plasma
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در این رساله به بررسی رفتار جواب های رده ای از معادلات دیفرانسیل با مشتقات جزیی در دامنه های کراندار می پردازیم . این معادلات به فرم نیم-خطی و غیر خطی برای مسایل مستقیم و معکوس مورد مطالعه قرار می گیرند . به ویژه، تاثیر شرایط مختلف فیزیکی را در مساله، نظیر وجود موانع و منابع، پراکندگی و چسبندگی در معادلات موج و گرما بررسی می کنیم و به دنبال شرایطی می گردیم که متضمن وجود سراسری یا عدم وجود سراسر...
Street-cleaning Problems and Practices
The problem of keeping our cities and towns clean is far more complex and baffling than most of our citizens realize. Many of our city officials do not truly realize its magnitude: they are aware that so many street sweepers, truck drivers, and white wings are on the payroll; but without investigation they naturally assume that the best possible job is being done. Many of us have visited other ...
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ژورنال
عنوان ژورنال: Journal of Japan Oil Chemists' Society
سال: 1969
ISSN: 1884-2003
DOI: 10.5650/jos1956.18.490