4篇
您的检索式：作者名="Yiyong Cheng"
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| 1 | Salt-sssisted and salt-suppressed sol gel transitions of methylcellulose inwater显示文摘 | Xu Yiyong Wang Cheng Tam K C | 2004 | Langmuir2004，20，64： | 1 |
| 2 | Monocrotophos Molecularly Imprinted Microspheres Prepared by Precipitation Polymerization in Acetonitrile显示文摘Molecularly imprinted microspheres (MIP) for monocrotophos have been prepared by precipitation polymerization in acetonitrile (ACN) 60℃,24 h,using methacrylic acid (MAA),ethylene glycol dimethacrylate (EGDMA) and 2, 2-azobisiobutyronitrile (AIBN) as functional monomer,cross-linker and initiator,respectively.The recognition mechanism was elucidated by UV-vis spectra and computer modeling.Equilibrium binding experiment was employed to investigate the rebinding properties,Scatchard analysis showed that specific binding sites formed in the imprinted microspheres,and there were two kinds of binding sites,one was high binding sites,the other was low binding sites.This microspheres can be useful affinity absorbent used for organophosphorus pesticides separation and purification in food and environmental analysis. | Shoulei Yan Zhixian Gao Yanjun Fang Yiyong Cheng | 2006 | 稀有金属材料与工程2006，35，A03： | 1 |
| 3 | A novel downshifting strategy based on medium-time-distance information for hybrid electric bus显示文摘Vehicle downshifting during braking for the hybrid electric vehicle(HEV) equipped with the automatic mechanical transmission(AMT) could adjust work points of the motor. Thus, downshifting has great potential to effectively improve the efficiency of braking energy recovery. However, the power interruption during shifting could cause some loss of regenerative energy meanwhile.Hence, the choice of the downshifting point during vehicle braking which has crucial effect on energy recovery efficiency needs to be intensively studied. Moreover, the real-time application of the high-efficiency braking energy recovery strategy is a challenging problem to be tackled. Therefore, this paper proposes a dynamic-programming-rule-based(DPRB) downshifting strategy for a specific hybrid electric bus(HEB) driving condition. Firstly, the braking characteristic of the HEB during the process of pulling in is analyzed. Secondly, the medium-time-distance(MTD) demonstrating the dimension of time and space is proposed to define the boundary condition of the running bus. Then, look-up tables are established based on a dynamic programming algorithm offline using multiple sets of historical data. Thus, Based on the real-time driving data, whether to enter the optimal gear selection process can be decided online. Finally, simulations and hardware-in-the-loop(HIL) tests are carried out, and the results show that the proposed method can be indeed effective for braking energy recovery. | CHENG Shuo ZHANG Yan YANG YiYong FANG ShengNan LI Liang WANG XiangYu | 2021 | Science China(Technological Sciences)2021，64，9： | 0 |
| 4 | Stereoconvergent and stepwise 1,3-dipolar cycloadditions of nitrile oxides and nitrile imines显示文摘The first example of stereoconvergent 1,3-dipolar cycloaddition of nitrile oxides and nitrile imines with E/Z isomeric mixture of electron-deficient olefins is reported,delivering isoxazolines and pyrazolines bearing two vicinal stereogenic tertiary and trifluoromethylated quaternary carbon centers with perfect regioand diastereoselectivities.The possibility of concerted cycloaddition/epimerization sequence under basic condition to form the thermodynamically stable diastereomers is excluded through some control experiments and DFT calculations,and a stepwise mechanism is proposed. | Zhenni Zhao Zhi Ou Subarna Jyoti Kalita Feng Cheng Qian Huang Yangyi Gu Yuhao Wang Yan Zhao Yiyong Huang | 2022 | Chinese Chemical Letters2022，33，6： | 0 |
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