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Investigation of Some Hard Coatings Synthesized by Ion Beam Assisted Deposition
He, Jian-Li,Li, Wen-Zhi,He, Xial-Ming,Liu, Chang-Hong The Korean Vacuum Society 1995 Applied Science and Convergence Technology Vol.4 No.s2
Ion beam assisted deposition(IBAD) technique was used to synthesize hard coatings including diamond-like carbon(DLC), carbon nitride(CN) and metal-ceramic multilayered films. It was found that DLC films formed at low energy ion bombardment possess more $Sp^3$ bonds and much higher hardness. The films exhibited an excellent wear resistance. Nanometer multialyered Fe/TiC films was deposited by ion beam sputtering. The structure and properties were strongly dependent on the thickness of the individual layers and modulation wave length. It was disclosed that both hardness and toughness of the films could be enhanced by adjusting the deposition parameters. The CN films synthesized by IBAD method consisted of tiny crystallites dispersed in amorphous matrix, which were identified by electron diffraction pattern to be $\beta -C_3N_4$.
Development of an Indoor Positioning System for Greenhouse Flying Robot
( Ming-jhe He ),( Suming Chen ),( Chao-yin Tsai ),( Chieh-yu Lin ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Precision cultivation is a new trend in agricultural production nowadays. The current greenhouse cultivation only uses a few of sensors to represent the overall state of the greenhouse. That couldn’t get the entire environmental conditions of greenhouse and make it difficult to implement precise cultivation in greenhouse. To utilize a quadrotor equipped with sensors to collect the environmental information in greenhouse; and locating the quadrotor is the primary task. Since the Global Positioning System cannot be used in the greenhouse, an indoor-positioning system to locate the quadrotor has to be studied. Lin (2017) has developed an indoor-positioning system which is based on UWB (Ultra-Wideband) technology but has not been able to extend to whole greenhouse. In this study, the number of anchors was increased by SPI (Serial Peripheral Interface bus) technology to extend the UWB indoor-positioning system to whole greenhouse. At present, the error of the absolute distance in the indoor positioning system is about 0.08 m. In the flight test, the quadrotor could fly on the scheduled paths and collect the environmental information.
Ming Guang He,Myung Hee Jung,Jong Ho Lee 한국유통과학회 2017 KODISA ICBE (International Conference on Business Vol.2017 No.-
The South Korean government made various efforts in order to attract Chinese tourists, resulting in more and more Chinese tourists flock in South Korea. In 2016, the number of Chinese tourists in South Korea reached 8 million and 60 thousand, and they became the main tourist group in South Korea, surpassing Japanese tourists for the first time (Korea National Tourism Organization, 2017). Nevertheless, increasing numbers of consumers choose to adopt the mobile payment tool instead of cash and credit cards in modern times with developed IT services. Firstly, it is essential to comb the concept of the mobile payment, the review of Alipay and the market situation of Alipay in South Korea.Thirdly, it is indispensable to analyze the effect of the service quality and the personal characteristics of Alipay on satisfaction and trust. Finally, on the basis of the analytic result, analyze the development of the Alipay market and the use of Alipay in South Korea. Moreover, this paper will put forward some flexible strategic plans for the development of Alipay and SMEs (small and medium-sized enterprises) in South Korean.
Direct ethanol production from dextran industrial waste water by Zymomonas mobilis
Ming-xiong He,Han Qin,Xiao-bo Yin,Zhi-yong Ruan,Fu-rong Tan,Bo Wu,Zong-xia Shui,Li-chun Dai,Qi-chun Hu 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.11
The direct production of ethanol from dextran industrial waste water was investigated by using Zymomonasmobilis via batch and semi-continuous fermentation mode. In batch fermentation, pretreated waste water (unsterilizedand sterilized), pH value (3.8 and 6.0), and Mg2+(with and without) was compared with OD600, sugar and ethanol con-centration. After 24 h fermentation, sugar in the dextran waste water was almost exhausted, and the amount of ethanolaccumulated reached 24.33-29.92 g/l, which is nearly 99% of the theoretical yield of ethanol. Kinetic parameters ofZ. mobilis in batch fermentation were also investigated. The raw dextran waste water was also used in semi-continuousfermentation. After 48 h fermentation, the production of ethanol was 28.65 g/l. These results indicated that dextranwaste water may be used as a candidate substrate and Z. mobilis could convert the raw material into ethanol directly.
He Shao-ming,Lin De-fu 한국항공우주학회 2014 International Journal of Aeronautical and Space Sc Vol.15 No.1
This article documents the design of a novel two-loop acceleration autopilot based on L1 adaptive output feedback control for tail-controlled missiles. The inner loop is an adaptive angle-of-attack tracking loop and the outer loop is the traditional PI controller for error compensation. A systematic low-pass filter design procedure is provided for minimum phase system and is applied to the inner loop design while the parameters of the outer loop are obtained from the multi-objective optimization problem. The effectiveness of the proposed autopilot is verified through numerical simulations under various conditions.