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| 1 | Ultrafine particle emission characteristics of diesel engine by on-board and test bench measurement显示文摘This study investigated the emission characteristics of ultrafine particles based on test bench and on-board measurements. The bench test results showed the ultrafine particle number concentration of the diesel engine to be in the range of (0.56-8.35)×10 8cm-3. The on-board measurement results illustrated that the ultrafine particles were strongly correlated with changes in real-world driving cycles. The particle number concentration was down to 2.0×106cm-3 and 2.7×107cm-3 under decelerating and idling operations and as high as 5.0×108cm-3 under accelerating operation. It was also indicated that the particle number measured by the two methods increased with the growth of engine load at each engine speed in both cases. The particle number presented a 'U' shaped distribution with changing speed at high engine load conditions, which implies that the particle number will reach its lowest level at medium engine speeds. The particle sizes of both measurements showed single mode distributions. The peak of particle size was located at about 50-80nm in the accumulation mode particle range. Nucleation mode particles will significantly increase at low engine load operations like idling and decelerating caused by the high concentration of unburned organic compounds. | Cheng Huang Diming Lou Zhiyuan Hu Piqiang Tai Di Yao Wei Hu Peng Li Jin Ren Changhong Chen | 2012 | Journal of Environmental Sciences2012，24，11： | 8 |
| 2 | A PEMS study of the emissions of gaseous pollutants and ultrafine particles from gasoline- and diesel-fueled vehicles显示文摘 | Cheng Huang Diming Lou Zhiyuan Hu Qian Feng Yiran Chen Changhong Chen Piqiang Tan Di Yao | 2013 | Atmospheric Environment2013，，： | 2 |
| 3 | Spectroscopic studies of structures of butyl and bromobutyl 显示文摘 | Cheng Diming Cheng Jin Wang Hecu | 1990 | Rubb Chem Technol1990，63，2： | 1 |
| 4 | A PEMS study of the emissions of gaseous pollutants and ultrafine par- ticles from gasoline-and diesel-fueled vehicles显示文摘 | HUANG Cheng LOU Diming HU Zhiyuan | 2013 | Atmospherie Environment2013，77，3： | 1 |
| 5 | A PEMS study of the emissions of gaseous pollutants and ultrafine particles from gasoline-and diesel-fueled vehicles 显示文摘 | HUANG Cheng LOU Diming HU Zhiyuan | 2013 | Atmos Environ2013，，77： | 1 |
| 6 | A PEMS study ofthe emissions of gaseous pollutants and ultrafine particles fromgasoline and diesel-fueled vehicles显示文摘 | HUANG Cheng LOU Diming HU Zhiyuan | 2013 | Atmospheric Environment2013，77，3： | 1 |
| 7 | PROBLEMS ON COMPUTING SHALLOW WATER CIRCULATION AND SIMULATING THE FLOW PAST ISLANDS IN NEARSHORE WATER显示文摘This paper continues discussing the problems of numerically solving the shallowwater circulation on the basis of ref. 1, For the numerical method proposed inref. 1, we applied a storage method with dense matrices, which abandoned usualbandwidth concept and attained the intention of saving interior storage, computingtime and amount of preparing work before computing. The circulation consideredthe effect of small islands was successfully simulated by specially dealing withthe bottom friction terms and the boundary conditions. In addition, we discussedthe action of bottom friction on the dissipation of tidal energy and its effecton stability of period motion. | ZHANG DIMING CHENG LIANGGUI, Department of Mechanics, Zhongshan University, Guangzhou,P.R. China | 1989 | Journal of Hydrodynamics1989，1，1： | 0 |
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