Search Results

You are looking at 11 - 20 of 37 items for :

  • "calibration" x
  • Materials and Applied Sciences x
  • Architecture and Architectonics x
  • Refine by Access: All Content x
Clear All

Nowadays most of the users needing geodetic accuracy use the Global Positioning System (GPS) with static measurements or with RTK (Real Time Kinematic) measurements. Few seconds are available to measure a detail point, therefore only the RTK method can satisfy the expectations. In this case (called observation space) the users require corrections from a base station. These corrections are available from the user’s own base station or they can be downloaded from the Internet if active permanent network is available in the area. There are many locations where kinematic data is recorded and have to be processed without owned base stations or without active permanent networks. For example, LEO (Low-Earth Orbit) satellite’s GPS receivers, ocean surface monitoring with GPS buoys or archaeological exploration in countries without geodetic base. This paper investigates the possibility of PPP (Precise Point Positioning) method processing kinematic data. It is known that the accuracy of this technique is enough in GIS (Geographic Information System) applications. To increase the accuracy and reach geodetic precision final orbits, clock data from the GPS satellites and receiver’s antenna calibration data are needed besides several additional parameters (called state space). The attainable accuracy will be determined after the examination of the results.

Restricted access

In the process of design and operation of sewerage system are used empirical formulas, which are in many cases, become obsolete and unusable when somebody can use nowadays modern technologies and materials. Therefore there is the possibility of using the mathematical models enormous importance for the enhanced environmental protection with the lowest operating and investment costs. In this modern method of analyzing of sewers has been designated as the first object, the object sedimentation tank. The purpose of the primary and secondary settling tank is to ensure the reduction of concentration the floating solids.

For the solution of research work has been chosen, after consultations with representatives of the Western Slovakia Water Company as interesting object of sedimentation tank located on the waste water treatment plant Nitra - Dolné Krškany.

Measurements on the object settlement tank situated at waste water treatment plant Nitra confirmed the expected speed parameters of the sewage in the tank. The velocity of wastewater is in the most cases very low, and even insignificant. However, finding that the sludge cloud has a non-standard form of a double wave gives the opportunity to optimize the operation of facilities sedimentation tank. The measured parameters are used as calibration parameters to input to the mathematical simulations, which are created by software ANSYS fluent.

Restricted access
Pollack Periodica
Authors: Daniel Buček, Martin Orfánus, Peter Dušička, and Peter Šulek

Information Services [ 20 ]. Map of hydraulic roughness is the result of the calibration process ( Fig. 1 ). Sediment transport models can be sensitive to hydraulic roughness, yet bed roughness does not make a good calibration parameter. Therefore, it was

Restricted access

. Calibration of Hourly energy simulation using Hourly monitored data and monthly utility records for two case study buildings, Department of Architecture Texas A&M University , Journal Proceedings of Building Simulation , Vol. 9 , 1997 , pp. 411 – 419

Restricted access
Pollack Periodica
Authors: Michaela Červeňanská, Dana Baroková, and Andrej Šoltész

conditions were set and preliminary selection of values for aquifer parameters and hydrologic stresses was performed (model design). During the calibration stage, a set of values for aquifer parameters and stresses, that approximates field-measured heads and

Restricted access

. [20] Ani E. C. , Wallis S. , Kraslawski A. , Agachi P. S. Development, calibration and evaluation of two mathematical models for pollutant transport in a

Restricted access

of the issue in automatic model calibration , Journal of Hydrology , Vol. 534 , 2016 , pp. 3 – 177 . [7] Guse B. , Pfannerstill M

Restricted access
Pollack Periodica
Authors: Andrej Šoltész, Dana Baroková, Zinaw Dingetu Shenga, and Michaela Červeňanská

accuracy of groundwater simulation depends on the quality and quantity of input data [ 5 ], it was necessary to obtain different input data to develop the conceptual model. Analysis of the current situation, calibration of the model and prediction of the

Open access

characteristics, dissolved oxygen concentration, biomass amount). It has a long tradition to use Activated Sludge Models (ASM) model family [ 10 ], therefore a lot of experience is gained in model calibration and validation procedure. These models focus on

Open access

instruments were used during the measurement due to synchronous measurement. 1 h method was applied. The number of occurrences of transient was evaluated during an hour [ 6–9 ]. Table 2 shows the TRAREC® calibration data of measuring instrument. Table

Open access