scholarly journals Selection of a method for calculating heat gain from solar radiation to determine the load on the climate system of the cabin of a mobile car

2021 ◽  
pp. 2-7
Author(s):  
Viktor V. Maslenskiy
Keyword(s):  
Solar Radiation ◽  
Time Of Day ◽  
Climate System ◽  
Ansys Fluent ◽  
Heat Gain ◽  
Model Calculations ◽  
Correct Determination ◽  
The Heat Balance ◽  
Selection Of

Introduction. The article analyzes and selects the most rational methods for calculating the heat gain from solar radiation. The correct calculation of this component of the heat balance allows you to correctly determine the power of the projected cabin climate system, which will ensure optimal working conditions at the workplace of mobile car operators. Problem Statement. The objective of this study is to analyze and select a rational method for calculating heat gain from solar radiation for the correct determination of the thermal load on the climate system of the cabin of a mobile car. Theoretical Part. To implement the task, the most common methods for calculating solar radiation were described and analyzed in detail and the most accurate ones were recommended. Conclusions. The more labor-intensive method of V.N. Bogoslovskiy (taking into account the time of day) can be recommended for automated calculations in Excel, and the method of P.Y. Gamburg (taking into account the sides of the horizon) — for comparative estimated engineering calculations. When conducting "in-depth" model calculations and accounting for solar radiation, the ASHRAE method is explicitly suitable, which has two important advantages: it takes into account the solar factor in relation to a specific type of glazing and is adapted for automated calculations in ANSYS FLUENT.

Organizational and methodological aspects of the selection of a wheelchair for children with cerebral palsy

2021 ◽  
Vol 88 (2) ◽  
pp. 17-19
Author(s):  
Ye.V. Markelova ◽  
◽  
N.K. Zulina ◽  
O.I. Tomina ◽  
◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Rehabilitation Program ◽  
Children With Cerebral Palsy ◽  
Primary Disability ◽  
Correct Determination ◽  
Methodological Aspects ◽  
The City ◽  
Additional Fixation ◽  
Selection Of

The article gives definitions to the concepts of "rehabilitation", "habilitation", "individual rehabilitation program", "technical means of rehabilitation". The statistical data on primary disability of children with cerebral palsy in the city of Khabarovsk for the period 2016–2020 are presented. The characteristics of a wheelchair with additional fixation for patients with cerebral palsy are given. The requirements for the provision of disabled people with technical means of rehabilitation (wheelchairs) are noted, the principles of selection and the tasks that must be solved when using them are indicated. The method of correct determination of the parameters of the wheelchair is presented to help doctors of medical organizations in the preparation of referral documents for medical and social examination

INTERPRETATION OF THE RESULTS OF IMMUNOHEMATOLOGICAL TESTS IN HEMATOLOGICAL PATIENTS

2019 ◽  
Vol 64 (4) ◽  
pp. 221-224
Author(s):  
A. V. Yovdiy ◽  
E. V. Butina ◽  
E. A. Poponina ◽  
G. A. Zaitseva ◽  
N. V. Minaeva
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Blood Components ◽  
Blood Types ◽  
Hematological Patients ◽  
Correct Determination ◽  
Double Population ◽  
Transfusion Complications ◽  
Selection Of

The correct determination of the blood types of the recipient and the donor is very importante for the choice of blood components for transfusion. As a result of the study, it was established that 18.0% of patients, admitted to the hematology clinic, have difficulties in interpreting of the results of immunohematological tests. Most often, a double population of red blood cells was detected when determining antigens of the Rhesus system (10.9%), auto- (3.9%) and alloantibodies (2.8%). The proposed algorithm for the selection of donor red blood cells in difficult diagnostic cases helps to prevent the development of post-transfusion complications.

Development and Application of Prediction Model for End-Point Manganese Content in Converter Based on Data from Sub-Lance

2013 ◽  
Vol 683 ◽  
pp. 497-503
Author(s):  
Bo Zhang ◽  
Zheng Liang Xue ◽  
Ke Liu ◽  
Wen Bin Xiao
Keyword(s):  
Bp Neural Network ◽  
Prediction Models ◽  
Manganese Content ◽  
Sample Data ◽  
Correct Determination ◽  
Spot Tests ◽  
Set Up ◽  
Selection Of ◽  
Mlr Model

Base on smelting data from converter sub-lance in a factory, the prediction models for end manganese content in converter were established by Multiple Linear Regression (MLR) and BP Neural Network (BP-NN) respectively. Prediction results showed that, MLR model was easy to set up, but could not accurately describe steelmaking process and its results were unsatisfactory, while BPNN model got more accurate prediction results for end manganese content in converter based on proper selection of model structure, adequate training using sample data and then correct determination of the weights. According to the spot tests, prediction relative error hit rate of 90.38% within ± 10% or 96.15% within ± 15%.

Environmental factors influencing pupal colour determination in Lepidoptera I. Experiments with Papilio polytes, Papilio demoleus and Papilio polyxenes

1978 ◽  
Vol 200 (1140) ◽  
pp. 295-329 ◽  
Keyword(s):  
Time Of Day ◽  
Relative Importance ◽  
Papilio Polyxenes ◽  
Factors Influencing ◽  
Green Vegetation ◽  
Papilio Demoleus ◽  
Pupation Site ◽  
Selection Of ◽  
Papilio Polytes

In greenhouse populations of Papilio polytes and Papilio demoleus it has been found that there is a greater probability for green pupae to be formed amongst green vegetation and brown ones on brown stems. Experiments have shown that the determination of pupal coloration depends upon variations in the environmental conditions experienced by a pupating larva. In both species the texture of the pupational substrate appears to be an important factor, brown pupae tending to be found on rough surfaces and green pupae on smooth ones. The effect is more pronounced in P. polytes than P. demoleus . Background colour also has some effect in both species though less than texture, and is more important in P. demoleus than P. polytes . Papilio polyxenes also appears to be affected by background colour. Differences in the relative importance of these factors in P. polytes and P. demoleus is interpreted in relation to the time of day a larva selects its pupation site. It is concluded that texture is relatively more important when the selection of a pupation site occurs in the dark as in P. polytes . Relative humidity, temperature and photoperiod also affect pupal colour and may be important relative to seasonal changes during the year. Physiologically the determination of pupal colour depends on the presence or absence of a hormone. Brown cuticle in both P. polytes and P. demoleus is produced following the secretion of hormone from a source in the head prior to the pupational moult. A green cuticle results when the pigmentation hormone is not secreted.

scholarly journals Determination of gushing potential of barley

2021 ◽  
Vol 67 (6) ◽  
pp. 548-552
Author(s):  
Sylvie Běláková ◽  
Tomáš Foltýn ◽  
Natálie Belcredi Březinová ◽  
Marek Pernica ◽  
Rastislav Boško ◽  
...  
Keyword(s):  
Control Method ◽  
Measured Data ◽  
Barley Variety ◽  
Malting Barley ◽  
Germination Process ◽  
Correct Determination ◽  
Selection Of ◽  
Stimulation Of

A new control method for the determination of the malting barley susceptibility to gushing was developed. The method is based on the modified Carlsberg test (MCT) after prior stimulation of barley with substances that promote the germination process. Barleys from the harvest of 2020 and malts produced from them were used to develop and verify the method. The selection of barleys was based on the results of gushing potential detected in the produced malts. To optimise and verify the method, the barley variety Sunshine with a high gushing potential of both barley (139±33 g) and malt (144±13 g), and the barley variety Pionier with zero gushing potential of both barley and malt were used. Malt was produced from the Lodestar barley variety with a high content of the mycotoxin deoxynivalenol. Gushing of the malt was 127±10 g. The gushing potential in barley was determined by the MCT method after prior stimulation of germination. For comparison, the gushing potential was also determined by the MCT method without stimulation of germination. It was proved that stimulation of germination is a key process for correct determination of the susceptibility of barley to gushing. The newly developed method was used for the determination of the gushing potential of five barleys from the harvests of 2020 and 2021. Control gushing determination of five malt samples was performed using the MCT method. An agreement between the measured data was found.

scholarly journals The Influence Of Solar Radiation On Temperature Increment Of Sheet Steel Structures

2015 ◽  
Vol 61 (1) ◽  
pp. 89-102 ◽  
Author(s):  
O. I. Kordun
Keyword(s):  
Solar Radiation ◽  
Spatial Orientation ◽  
Thermal Stresses ◽  
Sheet Steel ◽  
Steel Structures ◽  
Time Of Day ◽  
Direct Solar Radiation ◽  
Oriented Surface ◽  
Method Of Determination

AbstractThe paper considers method of determination of solar radiation amount falling on arbitrarily oriented surface of a structure. Provided method allows calculation of influence of structure’s geographical coordinates, spatial orientation of structure’s surface, day of year and time of day on received amount of solar radiation. The method is intended for determination of thermal stresses and deformations of sheet steel structures caused by action of direct solar radiation. Examples show usage of provided method.

Minimum apertures and Fresnel zones in migration and demigration

Geophysics ◽  
1997 ◽  
Vol 62 (1) ◽  
pp. 183-194 ◽  
Author(s):  
Jörg Schleicher ◽  
Peter Hubral ◽  
Martin Tygel ◽  
Makky S. Jaya
Keyword(s):  
Fresnel Zone ◽  
Prestack Migration ◽  
Common Opinion ◽  
Correct Determination ◽  
The Common ◽  
The Cost ◽  
Fresnel Zones ◽  
Selection Of

The size of the aperture has an important influence on the results of (Kirchhoff‐type) migration and demigration. For true‐amplitude imaging, it is crucial not to have apertures below a certain size. For both the minimum migration and demigration apertures, theoretical expressions are established. Both minimum apertures depend on each other and, although a time‐domain concept, are closely related to the frequency‐dependent Fresnel zone on the searched‐for subsurface reflector. This relationship sheds new light on the role of Fresnel zones in the seismic imaging of subsurface reflectors by showing that Fresnel zones are not only important in resolution studies but also for the correct determination of migration amplitudes. It further helps to better understand the intrinsic interconnection between prestack migration and demigration as inverse procedures of the same type. In contrast to the common opinion that it is always the greatest possible aperture that yields the best signal‐to‐noise enhancement, it is in fact the selection of a minimum aperture that should be desired in order to (a) enhance the computational efficiency and reduce the cost of the summation, (b) improve the image quality by minimizing the noise on account of summing the smallest number of traces, and (c) to have a better control over boundary effects. This paper demonstrates these features rather than addressing the question of how to achieve them technically.

DETERMINING THE DESALINATION UNIT COMPOSITION FOR COSTAL AREAS AND SMALL ISLANDS USE ANALYTIC HIERARCHY PROCESS

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Imam Setiadi ◽  
Dinda Rita K. Hartaja
Keyword(s):  
Analytic Hierarchy Process ◽  
Energy Demand ◽  
Pairwise Comparison ◽  
Small Islands ◽  
Ahp Method ◽  
Analytic Hierarchy ◽  
Comparison Research ◽  
Hierarchy Process ◽  
Selection Of

Selection of the appropriate composition desalination units can be done with a variety of method approaches, one of the method is the Analytic Hierarchy Process. In determining the desalination unit with AHP method to consider is setting a goal, an alternative criteria and pairwise comparison. Research for the determination of the exact composition of the desalination unit in order to achieve sustainable drinking water suppy in coastal areas and small islands has been conducted. The results of the study are as follows, the energy demand of 50.83%, operator costs of 26.64%, maintenance costs of 14.13% and chemical requirement 8.4%. For an alternative composition desalination unit of RO 10 m3 / day is the best alternative composition with value of 59.61%, the composition of the next alternative is RO 20 m3/ day of 30.40% and the last alternative of the desalination unit composition is RO 120 m3/ day of 09.99%.Key words : Desalination, Mukti Stage Flash Composition, AHP

Optimization of the selection of analysis methods for the determination of naturally occurring radionuclides

Kerntechnik ◽  
2008 ◽  
Vol 73 (3) ◽  
pp. 118-121
Author(s):  
T. Heinrich ◽  
L. Funke ◽  
M. Köhler ◽  
U.-K. Schkade ◽  
F. Ullrich ◽  
...  
Keyword(s):  
Naturally Occurring ◽  
Analysis Methods ◽  
Naturally Occurring Radionuclides ◽  
Selection Of
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