Selection of one-dimensional sedimentation: models for on-line use

1995 ◽  
Vol 31 (2) ◽  
pp. 193-204 ◽  
Author(s):  
Koen Grijspeerdt ◽  
Peter Vanrolleghem ◽  
Willy Verstraete
Keyword(s):  
Steady State ◽  
Selection Criteria ◽  
Data Sets ◽  
Concentration Profiles ◽  
A Posteriori ◽  
One Dimensional ◽  
On Line ◽  
Dynamic Concentration ◽  
Selection Of ◽  
Modelling Task

A comparative study of several recently proposed one-dimensional sedimentation models has been made. This has been achieved by fitting these models to steady-state and dynamic concentration profiles obtained in a down-scaled secondary decanter. The models were evaluated with several a posteriori model selection criteria. Since the purpose of the modelling task is to do on-line simulations, the calculation time was used as one of the selection criteria. Finally, the practical identifiability of the models for the available data sets was also investigated. It could be concluded that the model of Takács et al. (1991) gave the most reliable results.

Sistem Informasi Geografis (Sig) Properti Di Kota Tanjungpinang Berbasis Website

2019 ◽  
Vol 8 (1) ◽  
pp. 39-47
Author(s):  
Zulfachmi ◽  
Angger Andrea Amanda ◽  
Dedy Jauhari
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Unified Modeling Language ◽  
Geographic Information ◽  
Web Based ◽  
Unified Modeling ◽  
The Public ◽  
Property Specification ◽  
System Requirements ◽  
Selection Of

The increasing need for property in Tanjungpinang City is very growing, especially in the housing sector. Selection of property based on location and facilities and infrastructure is always a consideration for the community in making decisions to buy a property. Difficulty finding property location information in a certain area often occurs, resulting in people not getting references about the properties offered in Tanjungpinang City. The purpose of this research is to create a web-based geographic information system (GIS) regarding the distribution of the number of properties on offer, especially in Tanjungpinang City using a web-based mapping approach. In the development of Property GIS the author uses the Waterfall method and in the analysis of system requirements it is modeled with UML (Unified Modeling Language) and implemented with the PHP programming language and MySQLI database. It is hoped that the results of making this property's geographic information system can help the public to find out information about the distribution of properties offered, such as the location of property coordinates, addresses, prices, property photos, property specification data and property developer data.

scholarly journals Control of the Air Transportation System with Flight Safety as the Criterion

2016 ◽  
pp. 423-432 ◽  
Author(s):  
Alexander Rezchikov ◽  
Vadim Kushnikov ◽  
Vladimir Ivaschenko ◽  
Aleksey Bogomolov ◽  
Leonid Filimonyuk ◽  
...  
Keyword(s):  
Air Transportation ◽  
Transportation System ◽  
Flight Safety

Our Amazing Air Transportation System

1977 ◽  
Vol 14 (12) ◽  
pp. 1157-1168
Author(s):  
Raymond D. Kelly
Keyword(s):  
Air Transportation ◽  
Transportation System

scholarly journals Tracking of Aircrafts Using Software Defined Radio (SDR) With An Antenna

2021 ◽  
pp. 660-665
Author(s):  
H. Venkatesh Kumar ◽  
Surabhi. G ◽  
Neha V ◽  
Sandesh. Y. M ◽  
Sagar Kumar. H. S
Keyword(s):  
Real Time ◽  
Software Defined Radio ◽  
Air Transportation ◽  
Transportation System ◽  
Air Traffic ◽  
Next Generation ◽  
System Implementation ◽  
Traffic Surveillance ◽  
Radar Systems

Automatic Dependent Surveillance-Broadcast (ADS-B) is one in all the favoured technologies employed in air traffic surveillance. The ADS- B uses a band of 1090 MHz. ADS-B is attended with the prevailing radar-based technologies to locate aircraft. The Next Generation Air Transportation System (NGATS) conflicts can be detected and resolved by the coexistence of radar systems and ADS-B. Here we tend to track the aircraft using Software Defined Radio, hence the complexness and the value of ADS-B system implementation is drastically reduced. SDR can receive multiple numbers of aircraft information like altitude, latitude, longitude, speed, and direction in real-time and displayed by using an appropriate antenna. The usage of SDR maximizes the coverage of data with accuracy and may accomplish timely.

scholarly journals THE GRAVITY MODEL FORMALIZATION FOR THE INTERCITY PASSENGER’S CORRESPONDENCES PARAMETER’S ESTIMATION

2017 ◽  
Vol 16 (5) ◽  
pp. 437-443 ◽  
Author(s):  
C. V. Dolya
Keyword(s):  
Gravity Model ◽  
Transportation System ◽  
Gravity Models ◽  
Gravity Modeling ◽  
Passenger Transport ◽  
Passenger Transportation ◽  
The Given ◽  
Selection Of ◽  
Calibration Coefficients

he paper considers a possibility to apply gravity models for calculation of intercity passenger transport corres- pondences which are implemented with the help of public transport. The Ukraine transportation system has been selected as an object of investigation and this approach extends application possibilities of the obtained results. Calibration coefficients used in calculation of the indicated correspondences are rather important and significant in case of forecasting passenger transport correspondences. Formalization of these factors is necessary for every transportation system if a calculation of pas-senger transport correspondences has been made for it. In this case searching for actual calibration parameters and other coef-ficients as components of gravitational models is a relevant objective of the given paper. Selection of the gravity model va- riant plays rather significant role in solution of this problem. The developed methods for calculation of passenger transport correspondences are proposed for their application in respect of various transport and trip types. The executed research works have made it possible to investigate a process pertaining to providing of services for passenger transportation while using public routes. The obtained characteristics on functioning of the studied system have allowed to assess the possibility for ap-plication of the known methods for calculation of passenger correspondences and analyze the quality of their application. Calibration coefficients have been empirically selected for calculation of the indicated correspondences while using method of gravity modeling. Formalization of previously unexplored parameters of gravity model component provides the possibility to apply the considered approach for calculation of passenger correspondences within the framework of the investigated trans-portion system. This makes it possible to plan and arrange interaction of various transport types and provides new data and knowledge on the studied system.

Analysis of airport weather impact on on-time performance of arrival flights for the Brazilian domestic air transportation system

2021 ◽  
Vol 91 ◽  
pp. 101974
Author(s):  
McWillian de Oliveira ◽  
Ana Beatriz Rebouças Eufrásio ◽  
Marcelo Xavier Guterres ◽  
Mayara Condé Rocha Murça ◽  
Rogéria de Arantes Gomes
Keyword(s):  
Air Transportation ◽  
Transportation System ◽  
Weather Impact ◽  
Time Performance
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