http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Md. Masud Rana,박경세,선호정,임형렬,이홍기,심중표 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12
Several electrode parameters and operating conditions were investigated on the cell performance of anionexchange membrane-unitized regenerative fuel cell (AEM-URFC). The AEM-URFC’s performance increased withincreasing the ionomer and catalyst contents on the electrode up to an optimum amount and then decreased due tothe blockage of mesopores on the catalyst layers. The AEM-URFC with optimal ionomer and catalyst loaded showedthe maximum current (255.0mA/cm2) and power (127.5mW/cm2) density at 0.50 V for fuel cell mode at 60 oC. Also,three different kinds of commercial AEMs were tested in URFC. The catalyst for the bifunctional oxygen electrode hada pronounced influence on the cell performance of AEM-URFC. Ir black showed the highest WE performance thanother precious catalysts (Pt/C, PtRu black, and IrO2), but lower performance in FC mode than Pt/C and PtRu catalysts. The optimized AEM-URFC had 48.30% round trip efficiency, which is comparable or superior to the resultsreported in the literature.
Trend Characteristics of Atmospheric Particulate Matters in Major Urban Areas of Bangladesh
Md Masud Rana,Munjurul Hannan Khan 한국대기환경학회 2020 Asian Journal of Atmospheric Environment (AJAE) Vol.14 No.1
The urban areas of Bangladesh suffer from severe air quality problem especially in dry season (November-April) when the PM concentrations frequently rise to 7-8 times of the WHO guideline value. The Clean Air and Sustainable Environment (CASE) Project of the Department of Environment has deployed countrywide continuous air monitoring systems to regularly monitor the air quality of the urban areas of Bangladesh. In this paper hourly concentrations of PM10 and PM2.5 captured using β-attenuation method from 2013 to April 2018 in six important cities located in different regions of the country were exhaustively analyzed. Statistical analyses, diurnal and seasonal trends, and polar plots of PM concentrations were examined. Long range sources were spotted by Concentration Weighted Trajectory (CWT) method, where the trajectories were calculated using HYSPLIT-4 model. The analyses identified cities in the middle of the country (Dhaka, Narayanganj, Gazipur) as the most polluted ones while the city to the northeast region (Sylhet) was the least polluted. Average PM10 concentrations at Dhaka, Chattogram, Narayanganj, Gazipur, Sylhet and Barisal stations in dry seasons (November-April) were found 238.7±155.4, 190.7±108.5, 303.6±161.4, 227.3±142.7, 151.7±105.0 and 170.7±108.4 μg m-3 respectively whereas those in wet seasons (May-October) were 75.0±51.6, 55.5±40.8, 102.4±84.4, 60.6±48.5, 52.7±38.3, and 54.4±41.6 μg m-3 respectively. Correlative study of diurnal variations in PM concentrations and meteorological parameters revealed that the congenial meteorology aided in developing higher concentrations of both PM10 and PM2.5 during nighttime. Sources located to the northwestern districts (Naogao, Rangpur, Bogura) were traced by the CWT method contributing to the air pollution in other regions of the country. Outside the boundary, sources in Nepal, and Delhi-NCR and Uttar Pradesh regions of India could have contributed to fine particles at the middle of the country.
Md. Masud Rana,Md. Azizul Baten,Mezbahur Rahman 한국데이터정보과학회 2008 한국데이터정보과학회지 Vol.19 No.4
This paper considers three different models with two functional forms, Cobb-Douglas and Translog, for the stochastic frontier production function of food manufacturing industry of Bangladesh over the period 1981-1982 to 1999-2000. The models are proposed by Battese and Coelli (1992, 1995) and Huang and Liu (1994). The technical efficiency, total factor productivity, technological change and technical efficiency change have been estimated in the frontier models. The results indicate that 41.47%, 59.30% and 70.98% of the potential output are being realized in this sector. The mean increments in total factor productivity are approximately 2%, 9% and 4% respectively.
Rana, Md. Masud,Baten, Md. Azizul,Rabman, Mezbahur Korean Data and Information Science Society 2008 한국데이터정보과학회지 Vol.19 No.4
This paper considers three different models with two functional forms, Cobb-Douglas and Translog, for the stochastic frontier production function of food manufacturing industry of Bangladesh over the period 1981-1982 to 1999-2000. The models are proposed by Battese and Coelli (1992, 1995) and Huang and Liu (1994). The technical efficiency, total factor productivity, technological change and technical efficiency change have been estimated in the frontier models. The results indicate that 41.47%, 59.30% and 70.98% of the potential output are being realized in this sector. The mean increments in total factor productivity are approximately 2%, 9% and 4% respectively.
How Productive Are Life Insurance Institutions in Malaysia? A Malmquist Approach
Muhammad Mehedi Masud,Md. Sohel Rana,Md Aslam Mia,Md. Khaled Saifullah 한국유통과학회 2019 The Journal of Asian Finance, Economics and Busine Vol.6 No.1
The purpose of this study is to investigate empirical evidences of productivity of life insurance institutions in Malaysia. Therefore, this study attempts to explore the productivity of the life insurance institutions in Malaysia. The overall findings show that the total factor productivity (TFP) has progressed by 2.5% per year during the study period from 2012 to 2016 in the Malaysian insurance industry. However, TFP change has declined from 2012 to 2015 and observed a negative growth in 2015-16 (3.3%). The highest productivity progress was documented during 2012-13 at a rate of 11.7% while the minimum productivity progress was during 2014-15 (only 0.2%). The results also indicate that the decomposition of TFP found that overall progress could mainly be attributed to technological change (TC). However, technical efficiency change (TEC) and pure technical efficiency change (PTE) have negative impact on TFP. The findings also show that most of the insurance companies have a steady growth. Therefore, this study will contribute new insights for the policy makers and insurance institutions to take appropriate steps in developing relevant policies for increasing productivity of insurance institutions in Malaysia