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Zhang Mengna,Chen Xiaoqin,Ruan Yongying,Jiang Shihong,Yang Jiaoxu,Jiang Minbao,Ruan Xiaonan,Li You 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2
The Australian tortoise beetle Trachymela sloanei (Coleoptera: Chrysomelidae: Chrysomelinae), an invasive pest of several species of Eucalyptus has been reported for the first time in Asia. It was first detected in Shenzhen, China where it has become established. Currently, T. sloanei is not a destructive forest pest in Shenzhen. Pupae and adults were frequently found infected by an unknown fungus.
Zhiguo Zhao,Mengna Li,Chen Wang,Lanxing Jiang,Maoyao Wang 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.3
Since the mode transition performance of power-split DHT (Dedicated Hybrid Transmission) are directly influenced by torque dynamic characteristic of the brake, the brake pressure should be controlled accurately. In this paper, a dynamic model of brake and its pressure regulating system are established by considering system nonlinear characteristics and input disturbances, and a sliding mode variable structure controller is developed to track the brake pressure. First, the operation principle of DHT's pressure regulating system is introduced. Second, the dynamic models of solenoid proportional pressure valve, electromagnetic direction switching valve and brake are established with AMESim parametric plant model. Furthermore, a sliding mode variable structure controller for tracking pressure is designed based on MATLAB/Simulink. Finally, the AMESim parametric plant model is validated by measurements, and the proposed controller are verified by AMESim and Simulink co-simulation. The results show that the system dynamics can be well characterized by the AMESim parametric plant model. The target pressure can be tracked rapidly and accurately by using sliding mode variable structure controller and the controller has better robustness.
Zhou, Xiufeng,Lu, Juan,Jiang, Jingjing,Li, Xiaobin,Lu, Mengna,Yuan, Guotao,Wang, Zuoshan,Zheng, Min,Seo, Hyo Jin Springer 2014 NANOSCALE RESEARCH LETTERS Vol.9 No.1
<P>N-doped mesoporous TiO<SUB>2</SUB> nanorods were fabricated by a modified and facile sol–gel approach without any templates. Ammonium nitrate was used as a raw source of N dopants, which could produce a lot of gasses such as N<SUB>2</SUB>, NO<SUB>2</SUB>, and H<SUB>2</SUB>O in the process of heating samples. These gasses were proved to be vitally important to form the special mesoporous structure. The samples were characterized by the powder X-ray diffraction, X-ray photoelectron spectrometer, nitrogen adsorption isotherms, scanning electron microscopy, transmission electron microscopy, and UV-visible absorption spectra. The average length and the cross section diameter of the as-prepared samples were <I>ca</I>. 1.5 μm and ca. 80 nm, respectively. The photocatalytic activity was evaluated by photodegradation of methylene blue (MB) in aqueous solution. The N-doped mesoporous TiO<SUB>2</SUB> nanorods showed an excellent photocatalytic activity, which may be attributed to the enlarged surface area (106.4 m<SUP>2</SUP> g<SUP>-1</SUP>) and the narrowed band gap (2.05 eV). Besides, the rod-like photocatalyst was found to be easy to recycle.</P>