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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.
He Zhang,Jun Bo Zhang,Qing Bo Meng,Wei Guo,Ming Yang,Shuyao Wu,Qiong Wu,Daliang Liu,Xi-Ming Song 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
The emulsification by polyelectrolyte complexes is easy to handle, and could be considered as an effectivestrategy for introducing functional materials to liquid–liquid interfaces, but the related studies are stillinsufficient. Herein, a kind of copolymerized ionic liquid (PIL-co-PVIm) which is synthesized from 1-vinyl-3-ethylimidazolium bromide and 1-vinylimidazole, are used as polycation to form polyelectrolytecomplexes type Pickering emulsifiers with sodium alginate, poly(sodium 4-styrenesulfonate) and poly(acrylic acid) sodium salt respectively as polyanion. For toluene-water emulsion systems andhydrophobic ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIm]PF6)-watersystem, the polyelectrolyte complexes formed by PIL-co-PVIm and sodium alginate or poly (sodium4-styrenesulfonate) showed best emulsification capability. The emulsions stabilized by the polyelectro-lyte complexes at stoichiometric ratio are relatively less stable compared to non-stoichiometriccomplexes, while PIL-co-PVIm without complexation has no emulsification capability. The polyelectro-lyte complexes based on homopolymerized PIL give an unsatisfied emulsification capability, while theemulsification performance could be remarkably improved by copolymerizing ionic liquids with theuncharged comonomer, but excessive contents of the uncharged unit make the polyelectrolytecomplexes less interface active. The sheet-like PECs are formed in aqueous dispersions, and theirthickness is remarkably reduced at oil–water interface after emulsification, approximately ranging from200 nm to 10 nm by manipulating the polyanion.
Ming He Pei ...et al KYUNGPOOK UNIVERSITY 2001 Kyungpook mathematical journal Vol.41 No.2
In this paper, we study the existence and uniqueness of solution of two-point and three-point boundary value problems for nth-order ordinary differential equation (1.1) which possess boundary conditions (1.2), (1.3), (1.4), (1.5) and (1.6) respectively, where the results of the existence and uniqueness of solutions for BVP(1.1)(1.4), BVP(1.1)(1.5) and BVP(1.1)(1.6) generalize corresponding results in [6] and [7].
Diversity and Metal Tolerance of Nematode-Trapping Fungi in Pb-Polluted Soils
Ming-He Mo,Wei-Min Chen,Hao-Ran Yang,Ke-Qin Zhang 한국미생물학회 2008 The journal of microbiology Vol.46 No.1
The diversity of nematode-trapping fungi (NTF) in two lead (Pb) mines in Yunnan Province, China was investigated in 2004. In total, 20 species belonging to five genera were identified from 500 samples collected at the Lanping and the Huize mines. Pb concentrations ranged from 216~7,150 mg/kg for the former and 132~13,380 mg/kg for the latter, respectively. The fungi were divided into five groups based on different trapping mechanisms. The trapping-net producer group contained the largest number of species, with nine. Two predators, Dactylellina ellipsosporum and Arthrobotrys oligospora, were found at frequencies of 32.85% and 15.41%, respectively. The diversity indexes of NTF were positively correlated with Pb pollution levels in both the Lanping Mine (r=0.66) and the Huize Mine (r=0.72), suggesting that the distribution of NTF was not negatively affected by Pb contamination. For most strains of a given species, there was no significant difference (P>0.01) in the Pb tolerance between the strains isolated from habitats with low or high Pb concentrations. However, Pb toxicity exerted adverse effects on trap formation and predacious capability of fungi. We discuss the possible metal tolerance mechanisms and their relationships to the survival strategy of NTF in Pb-polluted environments.