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Mechanical Ventilation and Equipment
Mechanical ventilation systems for controlling conditions in individual zones can move a constant or variable supply of conditioned air to handle all or some of the heating and cooling loads. They are classified as all-air, air-water, and all-water systems. All-air systems include single-duct, dual-duct and multizone. The systems can be designed to operate at Constant Air Volume (CAV) or Variab...
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A blue array of GaN-based μLEDs and a Golden Dragon Plus commercial LED (OSRAM) were analysed under a pulsed current. A LabVIEW program by National InstrumentsTM is used to automate the measurements of the envelope at the top of the pulse at different frequencies. The program allows to save, to plot and to elaborate the data measured. The results, characterised by noise at high frequencies, sho...
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چکیده: در این تحقیق، برخی خواص فیزیکی و مکانیکی لوبیا قرمز به-صورت تابعی از محتوی رطوبت بررسی شد. نتایج نشان داد که رطوبت بر خواص فیزیکی لوبیا قرمز شامل طول، عرض، ضخامت، قطر متوسط هندسی، قطر متوسط حسابی، سطح تصویر شده، حجم، چگالی توده، تخلخل، وزن هزار دانه و زاویه ی استقرار استاتیکی در سطح احتمال 1 درصد اثر معنی داری دارد. به طوری که با افزایش رطوبت از 54/7 به 12 درصد بر پایه خشک طول، عرض، ضخام...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1941
ISSN: 0001-4966
DOI: 10.1121/1.1902264