scholarly journals Regularity of distribution of precipitation at the airdromes of Azerbaijan Republic

2009 ◽  
Vol 20 ◽  
pp. 9-12 ◽  
Author(s):  
N. Huseynov ◽  
B. Malikov
Keyword(s):  
Mathematical Analysis ◽  
Statistical Data ◽  
Civil Aviation ◽  
Precipitation Distribution ◽  
Analysis Methods ◽  
Basic Parameters

Abstract. A study of the regularity of precipitation distribution at the airdromes of Azerbaijan Republic was carried out for the purpose of defining the basic parameters of the climatic peculiarity that have an impact on the activities of civil aviation. For calculation of the key parameters, mathematical analysis methods are applied on the long-term statistical data.

Improvement Of The Method Of Winter Concreting With The Use Of Heating Wires

2019 ◽  
pp. 51-58
Keyword(s):  
Harmful Effect ◽  
Electric Heating ◽  
Strength Development ◽  
Construction Sites ◽  
Dominant Position ◽  
Heating Wire ◽  
Hands On ◽  
Basic Parameters ◽  
Monolithic Structures

Long-term experience of application of a method of electric heating by heating wires of the monolithic concrete and reinforced concrete structures erected in winter conditions is analyzed. This method, developed by the author of the article, took a dominant position on the construction sites due to the simplicity and efficiency in comparison with the mass applied in those years, the method of electric heating of concrete with steel round and strip electrodes. The data on labor intensity, material and energy costs in comparison with the method of rod electric heating are presented. Step-by-step technological operations on preparatory works and electric heating of monolithic structures with the use of extensive hands-on material, which formed the basis for the development of technological regulations, supplemented by a number of new proposals to improve the technology of works, are concretized. In order to work out the optimal mode of heat treatment, the studies of the concrete thermal conductivity factor in the process of its heating and strength development were carried out. The method for calculation of the basic parameters of concrete electric heating is presented. For simplification of calculations, for a wide contingent of masters, superintendents and technical personnel, the nomogram , making it possible with sufficient accuracy under the construction conditions to calculate the necessary heating parameters, was developed. The necessity of grounding the heating wire remaining in the concrete to reduce the harmful effect of magnetic radiation from various appliances and household appliances on the human body is noted.

The Economics of Air Traffic Control

1980 ◽  
Vol 33 (1) ◽  
pp. 23-29
Author(s):  
Angus Hislop
Keyword(s):  
Traffic Control ◽  
Air Traffic Control ◽  
Air Traffic ◽  
Air Transport ◽  
Civil Aviation ◽  
Department Of Transportation ◽  
Private Industry ◽  
The Us ◽  
The Uk

This paper is based mainly on a study carried out in 1976/7 for the UK Department of Industry into the long-term development of air traffic control systems in Europe by a team drawn from the Civil Aviation Authority, the Royal Signals and Radar Establishment and private industry, in which Coopers and Lybrand provided the economic expertise.Until the early 1970s, air traffic control was almost completely neglected by air transport economists. Economists contributed to the planning of airports and airline operations but not to the third facet of the air transport system. However, in 1970–1, in conjunction with a programme of expansion and improvement of the country's airports and airways, the US Department of Transportation launched a major study of the airport and airways system. This was designed to establish an equitable charging policy between the different categories of user but in the event its recommendations in this area have only recently begun to be followed.

scholarly journals Mathematical simulation of BF hot blast temperature influence on variations of silicon content in hot metal

2018 ◽  
pp. 25-31
Author(s):  
P. P. Semenyuk ◽  
R. E. Velikotsky ◽  
N. A. Rumyantseva
Keyword(s):  
Mathematical Model ◽  
Mathematical Analysis ◽  
Silicon Content ◽  
Statistical Data ◽  
Hot Metal ◽  
Blast Temperature ◽  
Mathematical And Computer Simulation ◽  
Hot Blast ◽  
Operation Results ◽  
Steel Works

The problem of influence of sinter production technological factors on silicon content and particularly variations of Si (ΔSi) in hot metal is actual for the up-to-date metallurgy.Traditional methods and plans of studies of BF heat running at present are considered less precise and effective comparing with up-to-date methods of mathematical and computer simulation, since the last provide an ability to forecast and optimize numerous parameters of BF process.A complex mathematical analysis of dependence between hot blast temperature and ΔSi by application of the universal mathematical model, specially elaborated and adapted for industrial conditions of sinter plant operation of Alchevsk steel-works was the task of the study.Influence of hot blast temperature (X-Factory) on minimization of ΔSi (Y-Factory) studied. Complex mathematical analysis was carried out using statistical data collected during 65 months of Alchevsk steel-works blast furnace of 3000 m3 operation. Results of calculation of influence of hot blast temperature on ΔSi by application of the universal mathematical model presented. Minimization of ΔSi when optimizing hot blast temperature reached. Accuracy of calculation using the elaborated model was more 99% of actual operational statistic.

scholarly journals Direct Start Preparations of Polish Tennis Representation to Under 16 Team World Championships (Chile, 2001)

2018 ◽  
Vol 1 (60) ◽  
Author(s):  
Marina Jagiello
Keyword(s):  
Training Load ◽  
Time Structure ◽  
Work Volume ◽  
Equal Importance ◽  
Preparation Period ◽  
Basic Parameters ◽  
Level 2

The analysis comprises a 33-day preparation period of the Polish representation in the fi nale of the Team World Championships held in Chile (16 10—22 10 2001). Particular attention was focused on the time structure of ap-plied training — the arrangement and duration of mesocycles and microcycles. The second aspect of the performed analysis, which was of equal importance, was the general volume and proportions of the applied training means. The performed studies and an analysis of data available in literature indicated that rational preparation to the main start in tennis should comprise the following factors: 1) phase of long term preparations and the current acquired fi tness level; 2) nature of preparations (orientation of workouts, type of applied means) as well as the values of basic parameters in training work (volume and intensity) that precede the particular period; 3) regularities connected with processes of restitution after diverse activities, as regards the magnitude (maximum, submaximal, average and small) and character of training load (related to speed, speed and strength, endurance, etc.); 4) the amount of time remaining for preparations to the main start.Keywords: structure of training, training mesocycles, training means.

Ocean Climate: “Off the Shelf”

2013 ◽  
Vol 47 (1) ◽  
pp. 7-18 ◽  
Author(s):  
Rick Cole ◽  
Jeff Kinder ◽  
Weidong Yu
Keyword(s):  
Private Sector ◽  
Academic Research ◽  
Atmospheric Conditions ◽  
Ocean Climate ◽  
Data Output ◽  
Basic Parameters ◽  
Additional Water ◽  
Scientists And Engineers ◽  
Additional Support

AbstractMeasuring ocean physics and atmospheric conditions at the sea-surface has been taking place for decades. The basic parameters measured remain with additional water column characteristics and meteorology added to data streams as technology advances within the community. A transition of this technology to the private sector from government and academic research institutions has occurred with additional support from innovative individual and group efforts in the field of ocean instrumentation. Due to licensing agreements between institutions and corporations along with entrepreneurial patents, scientists and engineers now have the resources available “off the shelf” (private sector purchase) to pursue and enhance the challenging task of measuring our offshore environment. As a result, long-term monitoring of ocean processes and changes has become more accessible to the research community at large. This paper describes one such project where original equipment manufactured instrumentation was integrated together to mirror the data output from government-funded monitoring systems on multinational ocean climate programs. RDSEA International, along with Down East Instrumentation, have developed a hybrid monitoring system using easily accessible off-the-shelf components.

Small cities of the Tver region: in search of a place formula

2020 ◽  
pp. 105-113
Author(s):  
I.P. Smirnov ◽  
A.A. Smirnova ◽  
P.S. Lebedev
Keyword(s):  
Development Strategy ◽  
Statistical Data ◽  
Moscow Region ◽  
Classical Concept ◽  
Small Cities ◽  
Key Characteristics ◽  
Geographical Position ◽  
Key Features ◽  
Tver Region

The article attempts to determine «the place formula» for four small cities of the Tver region – Toropets, Kalyazin, Bezhetsk and Bologoye. In the scientifi literature, the phrase «place formula» fi appeared and conceptually took shape, probably in the article by A.I. Zyryanov, published in the journal «Regional’nye issledovanija» in 2013. The theoretical framework of this concept is the classical concept of economic-geographical position (EGP). The identifi of the key features of the EGP of these small cities based on the fi research with using local historical information and statistical data. The studied cities are different in their history, location, performed functions and role in the space of the region. Several positions were chosen as the key characteristics that were included in the formulation of the main properties of the place: natural features, transport accessibility and density, metropolitan position, and centrality. The main features of the EGP, which formed the basis of the «geographical formula» for the selected small cities of the Tver region, are as follows: for Toropets – remoteness and borderline, for Kalyazin – location on the Volga and proximity to the Moscow region, for Bezhetsk – its existence as a center of agriculturally developed and densely populated territory, for Bologoye – its functioning as a railway junction between the two Russian capitals. For a city, and especially for a small one, the articulation and translation of its “formula” can become the basis for a long-term development strategy.

Preparation and biological evaluations of a collagen-like hierarchical Ti surface with superior osteogenic capabilities

2020 ◽  
Vol 8 (25) ◽  
pp. 5472-5482
Author(s):  
Weiwei Lao ◽  
Qiaojie Luo ◽  
Yadong Chen ◽  
Wei Yao ◽  
Jiajia Xu ◽  
...  
Keyword(s):  
Structure Function ◽  
Surface Structure ◽  
Mathematical Analysis ◽  
Analysis Methods ◽  
Structure Function Relationship ◽  
Function Relationship

The multiscale mathematical analysis methods provided a powerful tool to quantitatively analyze the multiscale topographical features of implant surfaces by scale and precisely reveal surface structure–function relationship.

Sign in / Sign up

Export Citation Format

Share Document