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COMMON STATIONARY POINTS OF MULTI-VALUED F-CONTRACTIONS WITH δ-DISTANCE
Liu1 Zeqing,Liu Ying,Kang Shin Min 경남대학교 수학교육과 2019 Nonlinear Functional Analysis and Applications Vol.24 No.1
Three common stationary point theorems for some multi-valued F-contractions with δ-distance in bounded complete metric spaces are proved. The results obtained in this paper are extended or are different from several results in the literature. Three nontrivial examples are given.
Study on the Thermal Decomposition of Waste Polystyrene in Motor Oil Using Microwave Energy
Liu, Xiao Yun,Kang, Tae Won 公州大學校 工學硏究院 生産技術硏究所 2003 論文集 Vol.11 No.-
A novel microwave-induced pyrolysis of waste polystyrene in motor oil was performed in quartz tube reactor. Different pyrolysis conditions were investigated, such as time range from 30 minutes to 1 hour and effective microwave power range from 180 to 250 watt. The distillate components were analyzed with GC-MS, and styrene, 1-methyl styrene, toluene, ethyl benzene were the four main products. Among these distillate products, styrene took over 70 percentages. Temperature of pyrolysis suing microwave was much lower than that of conventional thermal pyrolysis method.
Yali Zhao,Zeqing Liu,Shin Min Kang,Zunquan Xia 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.17 No.1-2
In this paper, we introduce and study a class of general strongly nonlinear quasivariational inequalities in Hilbert spaces. We prove the existence and uniqueness of solution and convergence of the perturbed the three-step iterative sequences with errors for this kind of general strongly nonlinear quasivariational inquality problems involving relaxed Lipschitz, relaxed monotone, and strongly monotone mappings. Our results extend, improve, and unify many known results due to Liu-Ume-Kang, Kim-Kyung, Zeng and others
ZHAO, YALI,XIA, ZUNQUAN,LIU, ZEQING,KANG, SHIN MIN 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.17 No.1
In this paper, we introduce and study a class of general strongly nonlinear quasivariational inequalities in Hilbert spaces. We prove the existence and uniqueness of solution and convergence of the perturbed the three-step iterative sequences with errors for this kind of general strongly nonlinear quasivariational inquality problems involving relaxed Lipschitz, relaxed monotone, and strongly monotone mappings. Our results extend, improve, and unify many known results due to Liu-Ume-Kang, Kim-Kyung, Zeng and others.
Liu, Wen Chao Liu, Jung Sun Kang and In Ho Ki Chao,Kang, Jung Sun,Kim, In Ho Agricultural Research Communication Center 2018 Indian Journal of Animal Research Vol.52 No.-
<P>A total of 60 weaned pigs with initial body weight (BW) of 8.51 ± 0.42 kg (28 d of age) were randomly divided into 2 groups of 30 each consisted of 6 pens with 2 gilts and 3 borrows and supplemented (treatment) 5.3×108 cfu/kg Lactobacillus plantarum GB805 in addition to basal diet offered during d 0 to 14 and d 15 to 42 (control). During the total trial period or different phases of trial, pigs fed L. plantarum diet had a higher (P less than 0.05) ADG, ADFI and feed efficiency. At the end of experiment, dietary L. plantarum supplementation improved (P less than 0.05) the apparent total tract digestibility of dry matter, nitrogen and the fecal Lactobacillus populations (P less than 0.05) while the fecal E.coli populations were decreased (P less than 0.05). In conclusion, dietary supplementation of L. plantarum GB805 had positive influence on growth rate, nutrient digestibility and gut microbial balance and its supplementation recommended to weaning pigs.</P>
Li Liu,Min-Young Kang,Jin-Ho Kang,Yeong Deuk Jo,Sota Koeda,Munetaka Hosokawa,Doil Choi,Byoung-Cheorl Kang 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
sy-2 (Seychelles-2) is a temperature sensitive natural mutant of Capsicum chinense and native to Seychelles Island in Africa. Previously we showed that sy-2 leaves were irregularly shaped and defective in chlorophyll development at temperatures below 24℃. A segregation test revealed that the sy-2 gene is controlled by a single recessive gene. To identify the sy-2 gene, we performed a map-based cloning approach using a total 600 individual F2 plants derived from crossing sy-2 and the wild type C. chinense ‘No.3341’. Fine-mapping of the locus allowed us to position sy-2 to an approximately 170-kb region flanked by markers IN2-1-1 and SNP-3-7 on chromosome 1. Among the approximately 36 hypothetical genes in this region several candidate genes including: HSP90-like ATPase family proteins, lipid-transfer proteins, calmodulin-domain protein kinases, and zinc finger proteins (ZFPs) were identified. RT-PCR and sequencing of the hypothetical genes are under way to identify sy-2.
Preparation of silica-encapsulated ZnSe nanocrystals by mixed surfactant microemulsions.
Liu, Kang,Ma, Sung Jin,Kim, Ji Hyeon,Choi, Hyung Wook,Kim, Kyung Hwan,Park, Sang Joon American Scientific Publishers 2013 Journal of Nanoscience and Nanotechnology Vol.13 No.11
<P>Silica-encapsulated ZnSe nanocrystals (NCs) have been prepared by employing sodium (2-ethylhexyl)sulfonate (AOT)/water/cyclohexane microemulsions containing ZnSe quantum dots with polyoxyethylenenonylphenylether (NP5)/water/cyclohexane microemulsions containing tetraethylorthosilicate (TEOS). Size tunable silica nanoparticles were achieved by using various water-to-surfactant ratios, W ([H2O]/[surfactant]). In order to characterize as-synthesized nanocrystals, photoluminescence (PL) spectroscopy, UV-visible spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) were employed. Cubic zinc blende quantum dots (QDs) (2.5 nm in diameter) were successfully encapsulated by silica nanoparticles (14.3-28.9 nm in diameter). The enhanced photoluminescence efficiency about 10% has been observed when compared with the results from the similar work using AOT microemulsions. The entire size of the silica-encapsulated nanocrystals increased with increasing W, then decreased slightly when free water exists in the core of the NP5/AOT microemulsion. On the other hand, the ZnSe NCs in the silica did not change their size during the synthesis. In addition, the possible mechanisms for growth of silica particles and the kinetics of silica particles formation were discussed.</P>
Adaptive Sliding Mode Based Disturbance Attenuation Tracking Control for Wheeled Mobile Robots
Kang Liu,Hongbo Gao,Haibo Ji,Zhengyuan Hao 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.5
This paper is devoted to investigating a composite controller for wheeled mobile robots in the presence of external disturbance and parametric uncertainty. Unlike the traditional backstepping technique existing the impractical velocity jumps, the proposed neural dynamic model has the ability to generate smooth continuous signals. Subsequently, a disturbance observer based adaptive sliding mode dynamic controller is introduced to estimate disturbances online, adjust control gain automatically and eliminate chattering phenomena completely. Under the developed control law, the ultimate boundedness of all signals is guaranteed and the tracking errors can be arbitrarily small in finite time. Simulation results are carried out to demonstrate the effectiveness of the proposed scheme.
A Constrained Optimization Approach to The Control of Inverters: Beyond the PWM Technique
Kang-Zhi Liu 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, a constrained optimization based approach is proposed for the switching control of inverters. This method achieves the best tracking performance of three phase currents, or equivalently the best tracking of torque command. This approach may be viewed as an improved SVM (space vector modulation) method. Detailed performance analysis and simulation prove that in the overmodulation region, a relative ratio of improvement up to 1/√3 and an absolute improvement up to E R (1 ?e?RTL ) are achieved over SVM. Meanwhile, the computation complexity is the same as SVM.