نتایج جستجو برای: cold zones
تعداد نتایج: 150279 فیلتر نتایج به سال:
To address the regional applicability of heat-source tower heat pumps (HSTHPs), a mathematical model HSTHPs was established and experimentally verified. In different thermal zones, seasonal operation characteristics were investigated in winter summer conditions. The results showed that, heating performance factor (HSPF) value cold zone is lowest, but it can reach 2.40 winter, HSPF values hot-su...
Flowering plants initially diversified during the Mesozoic era at least 140 million years ago in regions of the world where temperate seasonal environments were not encountered. Since then several cooling events resulted in the contraction of warm and wet environments and the establishment of novel temperate zones in both hemispheres. In response, less than half of modern angiosperm families ha...
The rampant multi-drug resistance among human pathogenic microorganisms has necessitated a continuous search for new and potent antimicrobial substances, especially among plants. Also, the importance of herbal plants as sources of alternative medicine is documented worldwide. In this study, antimicrobial activities of extracts of seven edible mushrooms and two spices (ginger and garlic) against...
Abstract As a type of energy production construction, building integrated photovoltaics (BIPV) roofs are contributing for achieving NZEB goals. Considering sites’ climate attributes with possible size PV systems can help to reduce the initial investment and consumption operation maintenance. This paper investigates patterns single-family houses, which is designed evaluate comprehensive efficien...
126 abstract: in this research we studied the effects of cyclic hydration and dehydration of cysts of artemia urmiana and artemia parthenogenetica on the hatching percentage, survival and growth. the experiment was carried out in 3 treatments (1-3 hydration/dehydration cycles) with 3 replicates for each treatment. later effects of cold preservation at -20°c during three time periods were ...
Recommender systems suggest to users items that they might like (e.g., news articles, songs, movies) and, in doing so, they help users deal with information overload and enjoy a personalized experience. One of the main problems of these systems is the cold-start, i.e., when a new item or user is introduced in the system and no past information is available, no effective recommendation can be pr...
در این پایان نامه در ابتدا دلایل شکل گیری آلاینده ها در شرایط cold start و warm up و راهکارهای کاهش آنها ارائه می شود. در ادامه، بهینه سازی فرایند شکل گیری مخلوط هوا و سوخت از طریق کنترل دقیق نسبت هوا به سوخت بعنوان یکی از بهترین راهکارهای عملی کاهش آلاینده ها در شرایط cold start و warm up با جزئیات کامل مورد بررسی قرار می گیرد. مدل بدست آمده (برای موتور پیکان انژکتور)، شبیه سازی می شود و نتایج...
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