scholarly journals Multi layer perceptron model in pattern recognition of surface parameters during pre-monsoon thunderstorm

MAUSAM ◽  
2022 ◽  
Vol 53 (4) ◽  
pp. 417-424
Author(s):  
SUTAPA CHAUDHURI ◽  
SURAJIT CHATTOPADHYAY
Keyword(s):  
Pattern Recognition ◽  
Fuzzy Logic ◽  
Surface Temperature ◽  
Surface Pressure ◽  
Dew Point ◽  
Multi Layer Perceptron ◽  
Surface Parameters ◽  
Point Temperature ◽  
Dew Point Temperature ◽  
Definite Pattern

The concept of Multi Layer Perceptron and Fuzzy logic is introduced in this paper to recognize the pattern of surface parameters pertaining to forecast the occurrence of pre-monsoon thunderstorms over Kolkata (22 ° 32¢ , 88 ° 20¢ ).   The results reveal that surface temperature fluctuates significantly from Fuzzy Multi Layer Perceptron (FMLP) model values on thunderstorm days whereas on non-thunderstorm days FMLP model fits well with the surface temperature.   The results further indicate that no definite pattern could be made available with surface dew point temperature and surface pressure that can help in forecasting the occurrence of these storms.

Study on Evaluation Index of Cold Insulation Performance

2012 ◽  
Vol 516-517 ◽  
pp. 1201-1204
Author(s):  
Hai Qian Zhao ◽  
Zhong Hua Wang ◽  
Xiao Yan Liu ◽  
Zhi Guo Wang
Keyword(s):  
Surface Temperature ◽  
Outer Surface ◽  
Environmental Parameters ◽  
Dew Point ◽  
Evaluation Index ◽  
Point Temperature ◽  
Dew Point Temperature ◽  
Two Temperatures ◽  
The Relationship ◽  
Insulation Performance

The outer surface temperature of cold insulation structure must be higher than air dew point temperature is stipulated in national standard.But the outer surface temperature of cold insulation structure and air dew point temperature normally wave in a certain range with the change of environmental parameters. In Practical application, it is difficult to determine the relationship between these two temperatures. Functional relationship between the outer temperature, air dew point temperature and environmental temperature or humidity is fitted.The influence of the air temperature and humidity is analyzed. Some suggestions about design and evaluation index of cold insulation are offered based on this research.

scholarly journals Evaluation of a complementary based model for mapping land surface evapotranspiration

2012 ◽  
Vol 9 (3) ◽  
pp. 3029-3062 ◽  
Author(s):  
Z. Sun ◽  
Q. Wang ◽  
Z. Ouyang ◽  
Y. Yang
Keyword(s):  
Surface Temperature ◽  
Land Surface ◽  
Thermal Emission ◽  
Remote Sensing Data ◽  
Dew Point ◽  
Point Temperature ◽  
Dew Point Temperature ◽  
Parameterization Method ◽  
A Site

Abstract. A modified Priestley-Taylor (P-T) equation was proposed by Venturini et al. (2008) to map actual evapotranspiration (ET) based solely on satellite remote sensing data, involving a parameter based on a scaled temperature between dew point temperature and surface temperature. In this study, however, theoretical analyses and field experimental evidence show that it is hard to obtain this scaled temperature using dew point temperature and surface temperature. This study also presents a new parameterization method using air temperature, surface temperature, and surface temperature of a reference dry surface. The actual ET estimates obtained by means of our proposed parameterization method are validated at a site scale, and a case study is conducted to map actual ET from Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) images using our proposed method. Results of ground-based validation and a case study of mapping ET using ASTER images indicate that the improvement on the modified P-T equation proposed by Venturini et al. (2008) can contribute to generating reliable actual ET.

Mold Issue in Details within the External Walled Structure

2015 ◽  
Vol 752-753 ◽  
pp. 628-631
Author(s):  
Hana Sevcikova ◽  
Eva Rykalová ◽  
Radek Fabian ◽  
Zdenek Perina ◽  
Marcela Halirova ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Dew Point ◽  
Masonry Structures ◽  
Expansion Joint ◽  
Point Temperature ◽  
Dew Point Temperature ◽  
Surface Temperatures ◽  
Critical Detail ◽  
Inner Surface

Article deals with the issue of mold in masonry structures. Attention was focused on the critical detail at expansion joint. Variants of solved detail are focused on the process of surface temperatures in the structure. This detail needs to be solved because of revitalization of the structure. Isotherms of the critical inner surface temperature and dew point temperature were used for the evaluation of the variants.

scholarly journals Improving efficiency and lowering operating costs of evaporative cooling

2021 ◽  
Vol 338 ◽  
pp. 01027
Author(s):  
Jan Taler ◽  
Bartosz Jagieła ◽  
Magdalena Jaremkiewicz
Keyword(s):  
Electricity Consumption ◽  
Open Circuit ◽  
Dew Point ◽  
Operating Costs ◽  
Water Evaporation ◽  
Total Water ◽  
Point Temperature ◽  
Dew Point Temperature ◽  
Adiabatic Cooling ◽  
Positive Effect

Cooling towers, or so-called evaporation towers, use the natural effect of water evaporation to dissipate heat in industrial and comfort installations. Water, until it changes its state of aggregation, from liquid to gas, consumes energy (2.257 kJ/kg). By consuming this energy, it lowers the air temperature to the wet-bulb temperature, thanks to which the medium can be cooled below the ambient temperature. Evaporative solutions are characterized by continuous water evaporation (approx. 1.5% of the total water flow) and low electricity consumption (high EER). Evaporative (adiabatic) cooling also has a positive effect on the reduction of electricity consumption of cooled machines. Lowering the relative humidity (RH) by approx. 2% lowers the wet-bulb temperature by approx. 0.5°C, which increases the efficiency of the tower, operating in an open circuit, expressed in kW, by approx. 5%, while reducing water consumption and treatment costs. The use of the M-Cycle (Maisotsenko cycle) to lower the temperature of the wet thermometer to the dew point temperature will reduce operating costs and increase the efficiency of cooled machines.

Thermal Insulation Of The Foundation Walls Of Buildings And Calculation Of Its Thickness

2021 ◽  
Vol 03 (04) ◽  
pp. 70-78
Author(s):  
Tulakov Elmurad Salomovich ◽  
◽  
Matyokubov Bobur Pulatovich ◽  
Keyword(s):  
Surface Temperature ◽  
Thermal Insulation ◽  
Energy Efficient ◽  
Building Materials ◽  
The Body ◽  
Dew Point ◽  
Dew Point Temperature ◽  
Energy Efficient Buildings ◽  
Basement Walls ◽  
External Barrier

If the surface temperature of any building material drops sharply without changing the humidity and the surface temperature is lower than the dew point temperature, dew-like water droplets are formed on the surface of this material. This condition is called condensing humidity condition. Condensation moisture formed on the surfaces of building materials and external barriers is slowly absorbed into the body of building materials over time, increasing the relative humidity of this structure. Condensation moisture can be observed when the temperature of the surfaces of external barrier structures drops sharply. This condition can be observed everywhere where the basement is connected to the outer walls of the basement. The article deals with the issue of thermal insulation and calculation of basement walls of modern energy-efficient buildings, which are widely used in the country and abroad.

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