scholarly journals Scalable Traffic Quality and System Efficiency Indicators Towards Overall Telecommunication System’s QoE Management

2018 ◽  
pp. 81-103 ◽  
Author(s):  
Stoyan Poryazov ◽  
Emiliya Saranova ◽  
Ivan Ganchev
Keyword(s):  
System Efficiency ◽  
Efficiency Indicators

scholarly journals Methods to decrease the influence of the vehicles’ service and repair system on the environment

2021 ◽  
Vol 334 ◽  
pp. 01021
Author(s):  
Irina Makarova ◽  
Vadim Mavrin ◽  
Larisa Gabsalikhova ◽  
Nikolaj Gorjaev
Keyword(s):  
Service System ◽  
Negative Impact ◽  
Environmental Management System ◽  
Repair System ◽  
System Efficiency ◽  
Environmental Aspects ◽  
Maintenance And Repair ◽  
Significant Negative Impact ◽  
The Impact ◽  
Efficiency Indicators

Article notes that vehicle maintenance and repair system have a significant negative impact on the environment. To reduce it, dealers must develop and implement an effective environmental management system. Identification of environmental aspects, as well as works and operations related to these aspects were performed. Model’s algorithm of the territorial accommodation of vehicle’s dealers is presented. This model will allow to find a balance between the vehicle’s service system efficiency indicators of the, the costs for owners to delivery of vehicles, waiting in the queue and maintenance and the impact on the environment.

scholarly journals Approximation splin models to improve telecommunication system efficiency indicators

Connectivity ◽  
2019 ◽  
Vol 141 (5) ◽  
pp. 35-39
Author(s):  
V. V. Onyshchenko ◽  
◽  
O. V. Nehodenko ◽  
O. A. Zolotukhina
Keyword(s):  
System Efficiency ◽  
Telecommunication System ◽  
Efficiency Indicators

scholarly journals Leakage Management and Pipe System Efficiency. Its Influence in the Improvement of the Efficiency Indexes

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1909
Author(s):  
Carlos Andrés Macías Ávila ◽  
Francisco-Javier Sánchez-Romero ◽  
P. Amparo López-Jiménez ◽  
Modesto Pérez-Sánchez
Keyword(s):  
Distribution Systems ◽  
Water Distribution ◽  
Distribution Networks ◽  
Calibration Method ◽  
Water Distribution Networks ◽  
Economic Losses ◽  
Pipe Material ◽  
System Efficiency ◽  
Pipe System ◽  
Efficiency Indicators

Water is one of the most valuable resources for humans. Worldwide, leakage levels in water distribution systems oscillate between 10% and 55%. This causes the need for constant repairs, economic losses, and risk to the health of users due to possible pathogenic intrusion. There are different methods for estimating the level of leakage in a network, depending on parameters such as service pressure, orifice size, age and pipe material. Sixty-two water distribution networks were analyzed to determine the leakage method used, the calibration method, and the percentage of existing leaks. Different efficiency indicators were proposed and evaluated using this database. Several cases of installation of pumps working as turbines (PATs) in water distribution networks were analyzed in which the use of these recovery systems caused a pressure drop, reducing the level of leaks and recovering energy.

THEORETICAL STUDY OF THE EFFECT OF GEOMETRICAL PARAMETERS AND LOCATION OF ROTOR IMPACT ELEMENTS OF AN IMPACT-CENTRIFUGAL GRINDER ON SPEED AND ANGLES OF CRUSHED PARTICLES FLIGHT

2020 ◽  
Keyword(s):  
Granulometric Composition ◽  
Theoretical Study ◽  
Process Efficiency ◽  
Geometrical Parameters ◽  
Grinding Process ◽  
Main Work ◽  
Impact Element ◽  
The Impact ◽  
Positive Effect ◽  
Efficiency Indicators

One of efficiency indicators of grain grinders is grain granulometric composition. The basis of mixed fodder is crushed grain, the particles of which must have a leveled granulometric composition for subsequent mixing and obtaining a high-quality feed mixture. In agricultural production, hammer crushers are widely used, in which the destruction of grain occurs due to the impact of a hinged hammer. The main disadvantage of these crushers is that not the entire surface of the hammers is involved in grinding, thus reduces grinding process efficiency. A slightly different principle of material destruction is laid down in the basis of the proposed design of the shock-centrifugal grinder. Main work is performed by flat impact elements located on the rotor, which serve to accelerate crushed particles with subsequent impact of them on the bump elements. An important step in the design of new constructions of shock-centrifugal grinders is to determine size and location of the impact elements on the rotor, without which the grinding process is not possible. In the calculation method presented, the dependencies for determining the velocities and angles of a single particle flight from the surface of a flat impact element for its specified dimensions are proposed. Two variants of an impact element location on the rotor are considered and analyzed: radial and at an angle in the direction of rotor rotation. As a result of research carried out, it is noted that in the case of inclined position of an impact element on the rotor an increase in flight speed and flight angles change in crushed particles, which gives the opportunity to have a positive effect on grinding process.

Energy Savings From System Efficiency Improvements in Iowa's HVAC SAVE Program

2013 ◽  
Author(s):  
S. Yee ◽  
J. Baker ◽  
L. Brand ◽  
J. Wells
Keyword(s):  
Energy Savings ◽  
System Efficiency

scholarly journals Prognostic Assessment of the Performance Parameters for the Industrial Diesel Engines Operated with Microalgae Oil

2021 ◽  
Vol 13 (11) ◽  
pp. 6482
Author(s):  
Sergejus Lebedevas ◽  
Laurencas Raslavičius
Keyword(s):  
Energy Efficiency ◽  
Diesel Engine ◽  
High Speed ◽  
Performance Parameters ◽  
Prognostic Assessment ◽  
High Speed Diesel ◽  
Microalgae Oil ◽  
The Difference ◽  
Smoke Opacity ◽  
Efficiency Indicators

A study conducted on the high-speed diesel engine (bore/stroke: 79.5/95.5 mm; 66 kW) running with microalgae oil (MAO100) and diesel fuel (D100) showed that, based on Wibe parameters (m and φz), the difference in numerical values of combustion characteristics was ~10% and, in turn, resulted in close energy efficiency indicators (ηi) for both fuels and the possibility to enhance the NOx-smoke opacity trade-off. A comparative analysis by mathematical modeling of energy and traction characteristics for the universal multi-purpose diesel engine CAT 3512B HB-SC (1200 kW, 1800 min−1) confirmed the earlier assumption: at the regimes of external speed characteristics, the difference in Pme and ηi for MAO100 and D100 did not exceeded 0.7–2.0% and 2–4%, respectively. With the refinement and development of the interim concept, the model led to the prognostic evaluation of the suitability of MAO100 as fuel for the FPT Industrial Cursor 13 engine (353 kW, 6-cylinders, common-rail) family. For the selected value of the indicated efficiency ηi = 0.48–0.49, two different combinations of φz and m parameters (φz = 60–70 degCA, m = 0.5 and φz = 60 degCA, m = 1) may be practically realized to achieve the desirable level of maximum combustion pressure Pmax = 130–150 bar (at α~2.0). When switching from diesel to MAO100, it is expected that the ηi will drop by 2–3%, however, an existing reserve in Pmax that comprises 5–7% will open up room for further optimization of energy efficiency and emission indicators.

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