scholarly journals Comparative analysis of adaptive systems for automatic stabilization of the water level in the drum boiler

2020 ◽  
Vol 971 ◽  
pp. 052039
Author(s):  
M Yu Livshits ◽  
I D Igonin ◽  
P A Sevastyanov ◽  
A A Khapalina
Keyword(s):  
Comparative Analysis ◽  
Water Level ◽  
Adaptive Systems ◽  
Automatic Stabilization ◽  
Drum Boiler

scholarly journals Ratio improved adaptive systems moving target autoregressive type

2015 ◽  
pp. 88-92
Author(s):  
V. G. Bartenev ◽  
M. V. Bartenev ◽  
V. K. Bityukov
Keyword(s):  
Comparative Analysis ◽  
Correlation Matrix ◽  
Adaptive Systems ◽  
Matrix Inversion ◽  
Ar Model ◽  
Moving Target ◽  
Correlated Noise ◽  
Weight Factor ◽  
Improvement Factor

The comparative analysis of the effectiveness of methods for implementing adaptive systems moving target based on autoregression approach. AR model correlated noise can effectively deal with clutter, without resorting to the algorithm based on the correlation matrix inversion. Considered several methods of weight factor of adaptive systems moving target, which is used as the coefficients of the autoregression. One of the main parameters that determine the effectiveness of the systems being compared, is the improvement factor, which was used in this study.

scholarly journals A comparative analysis of 3-D representations of urban flood map in virtual environments for hazard communication purposes

2018 ◽  
Vol 40 ◽  
pp. 06037 ◽  
Author(s):  
Rosa De Santis ◽  
Francesco Macchione ◽  
Pierfranco Costabile ◽  
Carmelina Costanzo
Keyword(s):  
Comparative Analysis ◽  
Water Level ◽  
Laser Scanning ◽  
Flood Hazard ◽  
Flood Hazards ◽  
Urban Flood ◽  
Hazard Communication ◽  
The Public ◽  
The Individual ◽  
The Impact

The flood hazard/risk maps do not allow a non-expert audience an immediate perception of the flooding impacts. Therefore, we need to modernize maps providing new communication approaches. In this context, 3-D representations of flood inundation through emerging formats in virtual and augmented realities may be considered as a powerful tool to engage users with flood hazards. The challenge of the research is to create a virtual 3-D environment aimed at supporting the public, practitioners and decision-makers in interpreting and understanding the impact of simulated flood hazards. For this purpose, the paper aims to perform a comparative analysis of two techniques to carry out the 3-D realistic visualizations of a flood map for representing a potential flooding of the Crati River, in the old town of Cosenza (South of Italy). The first approach develops a simple and quick workflow that provides an overall look at a neighbourhood level, but reveals some limits in water level visualization at the individual buildings scale. The second one requires additional terrestrial laser scanning (TLS) acquisition and overcomes some limits of the first approach, by providing a visual insight about water level close to building façades.

Asymmetry Analysis of Water Level Measured on Two Ends of Drum Boiler

2010 ◽  
Vol 148-149 ◽  
pp. 1421-1426
Author(s):  
Bo Zhou ◽  
Chao Yang Fei
Keyword(s):  
Power Plant ◽  
Water Level ◽  
Field Data ◽  
Natural Circulation ◽  
Feed Water ◽  
Related Factors ◽  
Drum Boiler ◽  
Measurement Systems ◽  
Water Flows ◽  
Asymmetry Analysis

Control of the water level in the drum of the boiler system is a critical operation consideration, because asymmetric dynamics of water level measured leads to measuring errors. This phenomenon is testified by field data from a 400t/h drum boiler with natural circulation in a power plant of China. Some equations are developed and several related factors are focused on, and two of which become critical ones accounting for asymmetry of measured value. With the study of structure of distribution pipes in drum, it is found that feed-water flows distributed on the opposite ends of drum are obviously asymmetric, where measurement systems are positioned. When more feed-water is supplied at one end of drum, the rate of steam in water and water temperature become lower, and measured level get higher. Through the simulation, the important factors for asymmetric of water level are found out, which is necessary to minimize the measuring errosrs.

scholarly journals Classical Karst hydrodynamics: a shared aquifer within Italy and Slovenia

2014 ◽  
Vol 364 ◽  
pp. 499-504 ◽  
Author(s):  
L. Zini ◽  
C. Calligaris ◽  
E. Zavagno
Keyword(s):  
Comparative Analysis ◽  
Water Level ◽  
River Water ◽  
Water Table ◽  
Water Levels ◽  
Transboundary Aquifer ◽  
Precise Evaluation ◽  
Transit Times ◽  
Two Sectors ◽  
Temperature Water

Abstract. The classical Karst transboundary aquifer is a limestone plateau of 750 km2 that extends from Brkini hills in Slovenia to Isonzo River in Italy. For 20 years, and especially in the last two years, the Mathematic and Geosciences Department of Trieste University has run a monitoring project in order to better understand the groundwater hydrodynamics and the relation between the fracture and conduit systems. A total of 14 water points, including caves, springs and piezometers are monitored and temperature, water level and EC data are recorded. Two sectors are highlighted: the southeastern sector mainly influenced by the sinking of the Reka River, and a northwestern sector connected to the influent character of the Isonzo River. Water table fluctuations are significant, with risings of > 100 m. During floods most of the circuits are under pressure, and only a comparative analysis of water levels, temperature and EC permits a precise evaluation of the water transit times in fractured and/or karstified volumes.

Sign in / Sign up

Export Citation Format

Share Document