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RISS 인기검색어
- 검색키워드
- 저자 : Alam Md. Zahangir (검색결과 3 건)
- 무료
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- 유료
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Development of an Intelligent Traffic Management System Based on Modified Round-Robin Algorithm
Md. Zahangir Alam,Mahfuzulhoq Chowdhury,Parijat Prashun Purohit 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.12
Now a days, each and everything in our life demands the characteristic of being real time. Traffic control is a challenging issue in our daily life and it always requires to be modified to cope with real time demand. Ongoing systems have limitation because these have fixed time interval for providing signal as well as non-systematic way of signal time manipulation which does not provide the flexibility to readjust the system according to the changing situation. More over choice of an appropriate algorithm is not suitable always to control the system with variety of time. Considering these facts we have proposed a traffic management system with a modified process scheduling algorithm. For the betterment of traffic management, we actually proposed a modified round-robin algorithm in this paper. To verify it’s appropriateness virtually, a simulation environment is developed in JAVA. We considered variety of input and calculated average waiting time, variance and standard deviation of waiting time as performance metric for selecting the most suitable scheduling algorithm. The performance of existing process scheduling algorithms and modified round-robin are evaluated and compared. Finally, the simulation results show that the proposed modified round-robin algorithm is better adaptable to design an intelligent traffic control system.
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Al-Amin Md.,Mumu Homayra Tabassum,Sarker Saugata,Alam Md. Zahangir,Gafur M. A. 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.1
The effects of sintering temperature and ZrO2 addition on the hardness and fracture toughness of zirconia toughened alumina (ZTA)–MgO–TiO2 composite was investigated. 5 wt.% CeO2 was added to ZTA containing 5 wt.% of MgO and 5 wt.% of TiO2. Two sets of composition A5ZMTC and A15ZMTC were used consisting of 5 wt.% and 15 wt.% of 3YSZ, respectively, to analyze the effect of CeO2 on the base composition. The powders were pressed into pellets and sintered at different temperatures of 1450 °C, 1500 °C, 1600 °C and 1650 °C for 3 h. Density, hardness and fracture toughness increased to a maximum value and then decreased. From the XRD analysis, Ce0.7Zr0.3O2 in only A5ZMTC and CeAl11O18 in only A15ZMTC are evident. The highest fracture toughness of 12.03 MPam1/2 (Casellas) was achieved at 1500 °C in A15ZMTC and maximum hardness of 14.15 GPa was obtained in A5ZMTC sintered at 1450 °C.
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Removal of Cadmium from Water by CNT–PAC Composite: Effect of Functionalization
Mohammed A. AlSaadi,Abdullah Al Mamun,Md. Zahangir Alam,Mutiu Kolade Amosa,Muataz Ali Atieh 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.1
Cadmium (Cd2+) is one of the toxic heavy metals that is frequently used in many industrial products. The wastewater from these industries and their products contains residual cadmium that are diffcult to be removed economically from the effluent. Carbon nanotubes (CNTs) were synthesized in several batches and tested for their removal efficacy with regards to cadmium removal from synthetic wastewater. Fixed catalyst chemical vapor deposition (FCCVD) reactor system was fabricated in the laboratory for the synthesis of CNTs on the powdered activated carbons (PACs). The PACs were impregnated with Fe3+ catalysts, and growth parameters such as the reaction time, gas flow rates and reaction temperature were optimized. The sorption capacity of the raw CNT–PAC was not satisfactory until the sorbents were functionalized which eventually led to high adsorption capacities. The surface properties of CNT–PAC were modified by oxidative functionalization using two different methods: sonication with KMnO4 and refluxing with HNO3 at 140℃. KMnO4-treated CNT–PAC exhibited the highest sorption capacity for cadmium uptake which increased from 4.77 mg/g (untreated CNT–PAC) to 11.16 mg/g; resulting in Cd2+ removal efficiency from 38.87% to 98.35%.
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