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Jie Wu,Zefu Wu 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7
We integrate institutional theory and the resource-based view of capability to examine the interplay of institutional environments and firm-specific capabilities on value-creating synergy by emerging market firms (EMFs). We argue that EMFs expand into countries with better-developed institutions as a means to overcome poor institutions at home. EMFs that develop strong absorptive capacity and knowledge transfer capability are better able to benefit from a portfolio of complementary sources of knowledge across multiple markets. We analyze data on a sample of manufacturing firms’ international expansion to demonstrate that expansion into a host country with a better-developed institutional environment promotes innovation success. This effect was found to be stronger for firms with strong absorptive capacity and well-developed knowledge transfer capability.
( Wu Jie Su ),( Yan Wu ),( Hui Ling Wu ),( Wen Bing Wang ) 한국잠사학회 2007 International Journal of Industrial Entomology Vol.15 No.2
Open reading frame 4 of Bombyx mori nucleopolyhedrovirus (BmNPV), designated as Bm4, is a gene whose function is completely unknown. With the recently developed BmNPV bacmid and a modified pFastBac1 whose polyhedrin promoter was replaced with ie1 promoter, a recombinant bacmid expressing Bm4-EGFP fusion protein under the control of ie1 promoter in BmN cells was successfully constructed. The result not only showed that the polyhedrin promoter can be replaced efficiently with other promoters to direct the expression of foreign gene in BmN cells by using Bac-to-Bac/BmNPV baculovirus expression system but also laid the foundation for rescue experiment of Bm4 deletion mutant due to the ability of ie1 promoter to direct gene expression throughout the infection cycle.
Wu, Wei-Jie,Ahn, Byung-Yong The Korean Society for Applied Biological Chemistr 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.5
To develop a cheonggukjang with high content of menaquinone (MK), bacterial strains were isolated from good quality cheonggukjang, and MK productivities of isolated strains were determined by high-performance liquid chromatography. After sensory evaluation and MK determination, a potential probiotics, BY01, with acceptable sensory quality and high productivity of MK was isolated. Fermentation under aerobic condition produced more MK than that obtained under anaerobic condition, and the synthesized MK mainly remained in the form of endocellular deposit. To identify species of strain BY01, biochemical tests and gyrase B gene (gyrB) sequence analysis were carried out, and strain BY01 was identified as Bacillus amyloliquefaciens. The content of MK in cheonggukjang fermented with B. amyloliquefaciens BY01 reached 7.54 ${\mu}g$/g, 2-fold higher than that of commercial cheonggukjang products. This is the first report on the isolation of B. amyloliquefaciens as a superior MK producer in cheonggukjang fermentation.
Simulating the construction process of steel-concrete composite bridges
Jie Wu,Dan M. Frangopol,Mohamed Soliman 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.18 No.5
This paper presents a master-slave constraint method, which may substitute the conventional transformed-section method, to account for the changes in cross-sectional properties of composite members during construction and to investigate the time-dependent performance of steel-concrete composite bridges. The time-dependent effects caused by creep and shrinkage of concrete are considered by combining the age-adjusted effective modulus method and finite element analysis. An efficient computational tool which runs in AutoCAD environment is developed to simulate the construction process of steel-concrete composite bridges. The major highlight of the developed tool consists in a very convenient and user-friendly interface integrated in AutoCAD environment. The accuracy of the proposed method is verified by comparing its results with those provided by using the transformed-section method. Furthermore, the computational efficiency of the developed tool is demonstrated by applying it to a steel-concrete composite bridge.
Wu, Di,Su, Liang-Cheng,Wu, Xiao-Jie,Zhao, Guo-Dong The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.2
An optimized space vector pulse width modulation (SVPWM) method with common mode voltage elimination and neutral point potential balancing is proposed for an open-end winding induction motor. The motor is fed from both of the ends with two neutral point clamped (NPC) three-level inverters. In order to eliminate the common mode voltage of the motor ends and balance the neutral point potential of the DC link, only zero common mode voltage vectors are used and a balancing control factor is gained from calculation in the strategy. In order to improve the harmonic characteristics of the output voltages and currents, the balancing control factor is regulated properly and the theoretical analysis is provided. Simulation and experimental results show that by adopting the proposed method, the common mode voltage can be completely eliminated, the neutral point potential can be accurately balanced and the harmonic performance for the output voltages and currents can be effectively improved.
Jie Cheng,Xisheng Zhan,Jie Wu,Huaicheng Yan 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.1
In this paper, the adaptive bipartite output containment problem is investigated, for a signed graph of heterogeneous multi-agent systems (HMASs). An adaptive state feedback algorithm and an output feedback algorithm are designed to ensure that cooperative and antagonistic agents enter different convex hull. A novel protocol is proposed for heterogeneous systems to deal with the bipartite output containment problem, where only the leader’s neighbours can learn the leader’s system matrix without all followers. Then, based on output regulation approach, Lyapunov stability analysis and some other methods guarantee that the bipartite output containment control problem is implemented. Finally, the validity of our analytical results is verified by the numerical simulations provided.
Jie-Hao Chen,Chih-Chun Hsieh,Pei-Shing Hua,Chia-Ming Chang,Chi-Ming Lin,Paxon Ti-Yuan Wu,Weite Wu 대한금속·재료학회 2013 METALS AND MATERIALS International Vol.19 No.1
A series of Fe-Cr-C hardfacing alloys is deposited by gas tungsten arc welding and subjected to abrasive wear testing. Pure Fe with various amounts of CrC (Cr:C=4:1) powders are mixed as the fillers and used to deposit hardfacing alloys on low carbon steel. Depending on the various CrC additions to the alloy fillers,the claddings mainly contain hypoeutectic, near eutectic, or hypereutectic microstructures of austenite γ-Fe phase and (Cr,Fe)7C3 carbides on hardfacing alloys, respectively. When 30% CrC is added to the filler, the finest microstructure is achieved, which corresponds to the γ-Fe+(Cr,Fe)7C3 eutectic structure. With the addition of 35% and 40% CrC to the fillers, the results show that the cladding consists of the massive primary (Cr,Fe)7C3 as the reinforcing phase and interdendritic Fe+(Cr,Fe)7C3 eutectics as the matrix. The (Cr,Fe)7C3 carbide-reinforced claddings have high hardness and excellent wear resistance under abrasive wear test conditions. Concerning the abrasive wear feature observable on the worn surface, the formation and fraction of massive primary (Cr,Fe)7C3 carbides predominates the wear resistance of hardfacing alloys. Abrasive particles result in continuous plastic grooves when the cladding has primary γ-Fe phase in a hypoeutectic structure.
Achieving fixed-time synchronization of the Kuramoto model via improving control techniques
Wu Jie,Liu Mingqi,Wang Xiaofeng,Ma Ru-ru 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.11
This paper further analyzes the fixed-time (FxT) phase agreement (PA) and the frequency synchronization (FS) of the Kuramoto model with identical and non-identical oscillators, respectively. The non-chattering control protocol is carefully picked to overcome the deficiency of the signum function contained in the conventional finite-time (FT)/FxT controllers, which improves the synchronized performance of networked systems. Furthermore, for reducing control cost, the switching control scheme is taken into consideration. Through the utilization of FxT stability theory, several sufficient conditions are derived successively for achieving the FxT PA and FS, in which the upper bound time estimates for arriving at PA and FS are given regardless of the initial states of the Kuramoto model. Finally, some simulation results lead to the conclusion that the proposed theoretical analysis is correct and effective.