نتایج جستجو برای: humidity index
تعداد نتایج: 419500 فیلتر نتایج به سال:
For this study, empirical data on the thermal comfort parameters (i.e. room space temperature, velocity and relative humidity) was collected for the computation of the PMV and PPD thermal comfort index for the three flat types. The study shows that wind ventilation has a great effect on the interior comfort condition. This is evident from the diurnal variations of PMV values. Majority of the da...
Substation protection is one of the most important schemes in power system. Rainfall, Humidity, Temperature and contaminations do not produce over voltage but are capable of lowering the flashover voltage and affect the operation of the equipment. The aim of the study was to identify the climatic factors especially the average lightning days and / or ground flash density so that substation desi...
Drought is one of the most devastating natural disasters, especially in China. In drought assessment, PDI has high robustness, easier to obtain than indices such as SPEI and PDSI, more advantageous regions with sparse stations. The present study employs annual precipitation temperature data from 830 meteorological stations systematically interannual variation characteristics humidity China duri...
A multilayer-based fiber optic sensor enabling simultaneous measurement of humidity and temperature is proposed and demonstrated. The sensitive elements were multilayer coatings consisting of nano-porous TiO(2) and SiO(2) films, which were deposited on fiber end-face to form a Fabry-Perot (F-P) filter structure. Relative-humidity (RH) sensing is correlated with the shift of interference fringe ...
We have prepared uniform films of chitosan with thicknesses 20 nm < h < 200 nm by spincoating solutions of chitosan dissolved in dilute acetic acid onto silicon substrates while controlling the spin speed and the relative humidity inside the spincoater. After neutralizing the films, they readily absorbed water in the presence of high humidity. Heating of the films to elevated temperatures cause...
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