Authors:Barhm Mohamad, Jalics Karoly, Andrei Zelentsov, and Salah Amroune
the acoustic design and the measurement methods of exhaust mufflers. The attenuation of gas dynamic noise relies on suitable reactive and dissipative with hybrid mufflers, designed and optimized to damp or emphasize certain spectral components of the
Authors:Ekhlas H. Karam, Noor S. Abdul-Jaleel, and Basma J. Salah
model order reduction method, called Mixed Reduction Method (MRM) is first optimized by Flower Pollination Algorithm (FPA), then the hybrid neuro-deadbeat control scheme is proposed to control different higher order systems, where the RDBC is combined
Authors:Hamid Ali, András Gábora, Muhammad Ali Naeem, Gábor Kalácska, and Tamás Mankovits
matrix syntactic foam have been discussed in [ 21 ]. Hybrid foams are foam structures which are reinforced by particles. The methods for the preparation of the samples were analyzed in [ 22 ] taking into consideration the particular use of the experiments
typical volumetric dataset were displayed by the new hybrid technique. In the following sections the main components of the introduced technique are detailed: The creation of 3D texture mapping proxy geometry; the hybrid compositing algorithm; the solution
Authors:Gusztáv Áron Szíki, Attila Szántó, and Tamás Mankovits
. Among the various types of alternative-drives, the most widespread ones are hybrid and electric drives, thanks to the rapid development of modern batteries, and hybrid and electrical systems. The range of electric vehicles that are commercially available
are Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS), and Infrastructure-as-a-Service (IaaS) [ 7 ]. Four types of cloud deployment models (Public, Private, Hybrid, and Community) that meet the essential business demands of cloud users [ 7
Thermal bridging caused by exposed concrete balcony slab is a major source of heat loss through energy efficient building envelopes. Moreover, thermal bridging can also create moisture management and indoor comfort challenges. Numerous investigations have been carried out to reduce heat transmittance through exterior building envelopes and minimize the energy use in buildings. The most effective way to minimize heat transmittance of exposed concrete balcony slabs is to thermally separate the exterior structure from the interior structure using thermal breaks. To enhance thermal separation, this paper investigates the effects of replacing high conductive materials such as reinforced concrete or structural steel with a multilayer composition of high-performance hybrid insulating systems. Reinforcing bars, such as fiber reinforced plastics (FRPs), having lower thermal conductivity than steel are used to connect interior to exterior and transfer loads. Numerical simulation tool THERM is used to study the effects of thermal breaks on energy performance of the concrete slab balcony joints. Simulation results indicate significant thermal performance improvement while high-performance hybrid insulating systems were used for exposed concrete balcony slab constructions, compared to traditional insulating systems used in similar constructions
Using alternative fuels (AF) in industry high consuming energy where fossil fuels are largely consumed may be a great solution to decrease CO2 emission and cost production. Or, when using these alternative fuels, the combustion may be difficult to control regarding the different components of AFs compared to fossil fuels. In this case, the use of the computational fluid dynamics CFD tools is a great solution to predict the AFs combustion behavior. This paper represents a computational study of petcoke and olive pomace (OP) co-combustion in a cement rotary kiln burner, established on the commercial CFD software ANSYS FLUENT. This study presents a useful key to choose an adequate simulation model that well predicts co-combustion problems. The performance of the K-ϵ turbulence models varieties (standard, Realizable, and Re-Normalization Group) combined with the hybrid finite rate/eddy dissipation model and the simple eddy dissipation model for predicting the co-combustion characteristics was investigated. The particle phase solutions are obtained using the Lagrangian approach. The performance of the mentioned model was evaluated based on the mesh accuracy, convergence time, temperature shape, and important chemical elements concentration. The predicted values of species concentrations and temperature are compared to the results obtained from the real case study and available literature. The standard K-ϵ model combined with the hybrid finite rate/eddy dissipation model gives the best results and the lower computational resources required for the 2-D model realized.
Due to the ISM band being unlicensed for communication applications, a lot of applications have been developed in this band and a good example is WiFi IEEE 802.11a, b, g, n of Bluetooth. This numeracy of applications motivated this paper. The paper is concerned with the design of a low distortion 20 dBm 2.4 GHz class-J power amplifier (PA) since PAs are indispensable in radio communications. The design is based on the AVAGO ATF-52189 transistor with a transition frequency of 6 GHz. The design is done as a hybrid circuit network realized using microstrip elements and surface mount device (SMD) capacitors. The schematic design and simulation are carried out using Keysight's Advanced Design System version 2016.01. The simulated PA exhibited a drain efficiency of 69% and a power output of 21 dBm.