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Synthesis of Some Pyrimido[4,5-b]quinoline Derivatives
Marjani, Ahmad Poursattar,Khalafy, Jabbar,Ebrahimlo, Ali Reza Molla,Prager, Rolf.H. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.7
A series of pyrimidoquinoline derivatives was synthesized in good yield and short reaction times by reaction of 3-arylaminoisoxazol-5(2H)-ones with derivatives of 2-chloro-3-formylquinoline in toluene under reflux conditions.
Application of dithering control for the railway wheel squealing noise mitigation
Seyed Rahim Marjani,Davood Younesian 국제구조공학회 2019 Smart Structures and Systems, An International Jou Vol.23 No.4
A new methodology for mitigation of the wheel squealing is proposed and investigated based on the dithering control. The idea can be applied in railway lines particularly in urban areas. The idea is clearly presented, and applied to a validated model. A full-scale model including the vehicle, curved track and wheel/rail contact is developed in the time domain to analyze the possibility and level of wheel squeal noise. Comparing the numerical results with a field test, the model is validated in different levels namely i) occurrence, ii) squealing frequency and iii) noise level. Two different approaches are proposed a) dithering of the wheel with piezoelectric patches and b) dithering of the rail with piezoelectric stacks. The noise level as well as the wheel responses is compared after applying the control strategy. A parametric study is carried out and effect of the dithering voltage and frequency on the squealing noise is investigated. It is found that both the strategies perform quite effectively within the saturating threshold of piezoelectric actuators.
Synthesis of Some Pyrimido[4,5-b]quinoline Derivatives
Ahmad Poursattar Marjani,Ali Reza Molla Ebrahimlo,Rolf. H. Prager,Jabbar Khalafy 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.7
A series of pyrimidoquinoline derivatives was synthesized in good yield and short reaction times by reaction of 3-arylaminoisoxazol-5(2H)-ones with derivatives of 2-chloro-3-formylquinoline in toluene under reflux conditions.
Somayeh Harimi,Azam Marjani,Sadegh Moradi 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.9
Numerical study of forced convection heat transfer and fluid flow in laminar flow regime for a circular cylinder attached by three control rods is performed using the overset grid method. The aim of this work is evaluation of the control rods performance placed in equilateral triangular arrangements in suppressing vortex induced vibration of a primary cylinder. The influence of the dimensionless parameters including attach angle α, spacing ratio G/D, and Reynolds number on the hydrodynamic forces of the primary cylinder is also investigated. The unsteady flow at Reynolds number of 200 and prandtl numbers of 0.7 and 7.0 is considered. In order to discretize the governing equations, a finite volume code based on the SIMPLEC algorithm is employed. Moreover, the local and mean Nusselt numbers are presented to illustrate the heat transfer characteristics of the primary cylinder and surrounding rods.
Performance Evaluation of Elderly Home Automation Control (EHAC) IoT System
Phua, Karsten Cheng Kai,Goh, Wei Wei,Marjani, Mohsen International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.1
As the number of elderly increased rapidly every year, many elderly still choose to stay independent despite of difficulties and challenges faced in their daily routine. Elderly has desperate needs for support for their living. Internet of Things helps to support and improve elderly's life in many ways to meet the needs and requirements. Home Automation Control (EHAC) is a research based system that support elderly with controlled automation solution that control and operates various home electrical appliances based on the measurement of heart pulse rate and environment temperature. This paper works on EHAC system to evaluate the performance of the system in elderly's daily routine. This paper presented experiments conducted with approach of IoT testing and discussion on analysis of the results.