scholarly journals Measured and modeled spatial rain rate correlation to improve the prediction method for satellite site diversity

Radio Science ◽  
2014 ◽  
Vol 49 (12) ◽  
pp. 1232-1244 ◽  
Author(s):  
Terje Tjelta ◽  
Jostein Mamen ◽  
Lars Erling Bråten ◽  
Per Arne Grotthing
Keyword(s):  
Rain Rate ◽  
Prediction Method ◽  
Site Diversity ◽  
Rate Correlation

30 GHz skynoise site diversity and concurrent rain rate measurements

1988 ◽  
Vol 24 (24) ◽  
pp. 1529 ◽  
Author(s):  
F. Dintelmann ◽  
F. Rücker
Keyword(s):  
Rain Rate ◽  
Site Diversity

scholarly journals Prediction Method for Rain Rate and Rain Propagation Attenuation for K-Band Satellite Communications Links in Tropical Areas

2014 ◽  
Vol 8 (2) ◽  
pp. 85-96 ◽  
Author(s):  
Baso Maruddani ◽  
◽  
Adit Kurniawan ◽  
Sugihartono Sugihartono ◽  
Achmad Munir ◽  
...  
Keyword(s):  
Rain Rate ◽  
Prediction Method ◽  
Satellite Communications ◽  
Tropical Areas ◽  
K Band

Selection of a leading edge noise prediction method for PNoise

2018 ◽  
pp. 214-223
Author(s):  
AM Faria ◽  
MM Pimenta ◽  
JY Saab Jr. ◽  
S Rodriguez
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Prediction Method ◽  
Leading Edge ◽  
Wind Farms ◽  
Broadband Noise ◽  
Turbulence Energy ◽  
Noise Prediction ◽  
Migration Routes ◽  
Turbulent Inflow

Wind energy expansion is worldwide followed by various limitations, i.e. land availability, the NIMBY (not in my backyard) attitude, interference on birds migration routes and so on. This undeniable expansion is pushing wind farms near populated areas throughout the years, where noise regulation is more stringent. That demands solutions for the wind turbine (WT) industry, in order to produce quieter WT units. Focusing in the subject of airfoil noise prediction, it can help the assessment and design of quieter wind turbine blades. Considering the airfoil noise as a composition of many sound sources, and in light of the fact that the main noise production mechanisms are the airfoil self-noise and the turbulent inflow (TI) noise, this work is concentrated on the latter. TI noise is classified as an interaction noise, produced by the turbulent inflow, incident on the airfoil leading edge (LE). Theoretical and semi-empirical methods for the TI noise prediction are already available, based on Amiet’s broadband noise theory. Analysis of many TI noise prediction methods is provided by this work in the literature review, as well as the turbulence energy spectrum modeling. This is then followed by comparison of the most reliable TI noise methodologies, qualitatively and quantitatively, with the error estimation, compared to the Ffowcs Williams-Hawkings solution for computational aeroacoustics. Basis for integration of airfoil inflow noise prediction into a wind turbine noise prediction code is the final goal of this work.

STUDY OF THE ORGANIZATION ADAPTIVITY RATE CORRELATION IN RELATION TO ITS INTERNAL INTEGRITY

2020 ◽  
Vol 3 (4) ◽  
pp. 292-304
Author(s):  
Inna O. Hordieieva ◽  
Valentina M. Molokanova
Keyword(s):  
Project Management ◽  
Stable State ◽  
Evolutionary Development ◽  
Current State ◽  
Modern Project ◽  
Development Processes ◽  
Methodological Principles ◽  
Internal Integration ◽  
Strategic Project ◽  
Rate Correlation

The focus of modern project management is increasingly shifting from the management of individual projects to the management of strategic project-oriented development of organizations. Now there is a need to pay more attention to project management as a universal tool for the development of systems at any level. The aim of the article is to study the processes of organization adaptation to constant changes through a synergetic portfolio of projects based on a strategic plan for the development and evolution of the organization. The spiral movement of systems development for studying development processes is considered: the process of transition of an organization from one stable state to another, the process of radical changes that accompanies innovation, as well as the processes of growth and development of crisis phenomena. The methodological principles of the organization evolutionary development management through the implementation of portfolio using its methods and tools are considered. It is proposed to manage the organization evolutionary development by building actions in the form of a synergistic portfolio of appropriate projects content, in order to increase the value of the entire portfolio of projects over the value of individual projects. The synergetic portfolio of projects is seen as a tool for a harmonious transition to the desired evolutionary state, by preserving the internal integrity of the organization and ensuring its sustainability. A mathematical model for estimating the desired properties and relations of the organizational synergetic portfolio of projects is proposed, which allows to determine and minimize the magnitude of the evolutionary goals inconsistency and to stabilize the current state of organization. It is determined that the two main tasks of any organization - external adaptation and internal integration - constantly push the organization to evolutionary development. The article proposes the author's approach to managing the organization evolutionary development through a portfolio of projects identifies indicators of adaptation of the organization to changes in the environment, defines the conditions for maintaining the integrity of the organization in the process of organizational changes.

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