نتایج جستجو برای: since a long time ago
تعداد نتایج: 13850597 فیلتر نتایج به سال:
در این پایان نامه در فصل اول مقدمه ا ی در باره ساختار پایان نامه بحث شده است در فصل دوم به معرفی ساختار های a/dهای با سرعت بالا پرداخته می شود . در فصل سوم به معرفی ساختار مبدل a/d پایپ لاین و مشکلات آن پرداخته و در ادامه در فصل چهارم ساختار a/dپایپ لاین 1.5 bit /stage معرفی می گردد.در فصل پنجم ساختار مبدلهای a/d time interleaved تشریح شده و مسائل و مشکلات موازی کردن مبدلهای...
Data have been fundamental to the scientific practice of medicine since at least time Hippocrates around 2500 years ago, relying on detailed observation cases and rigorous comparison between [...]
Until a few years ago the polyomavirus family (Polyomaviridae) included a dozen viruses identified in avian and mammalian hosts. Two of these, the JC and BK-polyomaviruses isolated a long time ago, are known to infect humans and cause severe illness in immunocompromised hosts. Since 2007 an unprecedented number of eight novel polyomaviruses were discovered in humans. Among them are the KI- and ...
many mobile and off-grid devices include electronics and other electrical consumers like servo drives, which need a quite low supply power. since the price for photovoltaic modules drops continuously, photovoltaic power supply is interesting in more and more applications. in solar powered systems, a battery is needed to store energy for the night and cloudy periods. the power electronics of suc...
monascus purpureus is a fungus that had been cultured on the rice in eastern asian countries since thousands years ago and used as a food for long years. the fungus produces very valuable metabolites with polyketide structure. the most important metabolite is monacolin k, lovastatin or competitive inhibitor of 3-hydroxy-3-methylglutaryl-coenzyme a reductase (an affective enzyme in cholesterol s...
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