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Huan-Yong Ji,Jing Li,Chong-Feng Lan,Dan-Feng, Wang,Yong-Sheng Jin 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.5
Open Innovation gains a wide spread attention in technology management research in recent years. Because existing research about the relationship between outbound open innovation and innovation performance is limited and context factors are ignored in existing research and based on Chesbrough’s open innovation model and theory of enterprise competence, this study introduces enterprise competence and knowledge spillovers into the field of outbound open innovation, explores their moderated roles between open innovation and innovation performance. We use high-tech firms as research sample to test the hypothesis that we proposed and find that: (1) outbound open innovation has a positive effect on innovation performance; (2) both enterprise competence and knowledge spillovers moderate the relationship between outbound open innovation and innovation performance. These conclusions have important implications for the development and application of open innovation theory.
Huan-Rui Wang,Ji-Qiang Gao,Fang-Li Yu,Yuan Li,Jian-Feng Yang 한양대학교 세라믹연구소 2009 Journal of Ceramic Processing Research Vol.10 No.6
In this study, porous Si3N4 ceramics were obtained by a slip casting method which would be easier applied in industry. The most stable and dispersing aqueous suspension was obtained from a solid slurry content of 56.2%, a carboxymethyl cellulose concentration of 0.3% as the adhesive and 0.05% glycerol as the defoamer. Petroleum coke was used as pore-former, and at the same time, it was helpful for the stability of the suspension. The burning-out of the petroleum coke seemed to be an economical way for increasing the porosity of porous Si3N4. After sintering at 1,800℃ for 2 h, samples with a pore size about 10 μm, porosities of 45-60%, and flexural strength of 52.0-112.1MPa were obtained. In this study, porous Si3N4 ceramics were obtained by a slip casting method which would be easier applied in industry. The most stable and dispersing aqueous suspension was obtained from a solid slurry content of 56.2%, a carboxymethyl cellulose concentration of 0.3% as the adhesive and 0.05% glycerol as the defoamer. Petroleum coke was used as pore-former, and at the same time, it was helpful for the stability of the suspension. The burning-out of the petroleum coke seemed to be an economical way for increasing the porosity of porous Si3N4. After sintering at 1,800℃ for 2 h, samples with a pore size about 10 μm, porosities of 45-60%, and flexural strength of 52.0-112.1MPa were obtained.
Huan-Yong Ji,Yong-Sheng Jin,Jing Li,Hui Tian,Shang-Zheng Feng 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.11
As market competition continuously intensifies, how to cope with existing and potential market challenges in complex, dynamic environments is a major problem haunting Chinese e-commerce enterprises in their strategic planning. In order to solve this problem, the theory of organizational ambidexterity is applied in this paper to the strategic practices of Chinese e-commerce enterprises, and starting from the view of corporate leadership, the mediated role of top management’s behavioral integration (referred to as TMBI in the following content) in the relationship between transformational leadership behavior and organizational ambidexterity is discussed. In addition, against the practical background that Chinese e-commerce enterprises are facing highly competitive environments, further clarification is made herein by using environmental dynamics as the moderator variable for the mediated link. Through empirical tests on 198 samples of Chinese e-commerce enterprises, we find that: 1) transformational leadership has a positive influence on organizational ambidexterity, and TMBI plays a full mediated role in that influencing process; 2) environmental dynamics moderates the relationship between transformational leadership and TMBI, but don’t have a moderated effect on the relationship between TMBI and organizational ambidexterity. According to the research conclusion in this paper, the mechanism of transformational leadership influencing organizational ambidexterity can be better explained when two important factors, TMBI and environmental dynamics, are taken into consideration. The research in this paper provides not only important revelations for the development of organizational ambidexterity research as well as the application of relevant research achievements, but also supports for Chinese e-commerce enterprises’ effective strategic practices in theory.
( Huan Lan ),( Jiang Zhu ),( Qing Ai ),( Zheng Mei Yang ),( Ying Ji ),( Su Ling Hong ),( Fang Zhou Song ),( You Quan Bu ) 생화학분자생물학회 2010 BMB Reports Vol.43 No.12
Plk 1 is overexpressed in many human malignancies including laryngeal carcinoma. However, its therapeutic potential has been never examined in laryngeal carcinoma. In the present study, a simple cellular morphology-based strategy was firstly proposed for rapidly screening the effective siRNAs against Plk1. Furthermore, we investigated the effects of Plk1 depletion via a novel identified effective siRNA against Plk1, Plk1 siRNA-607, on human laryngeal carcinoma Hep-2 cells. The results indicated that Plk1 siRNA-607 transfection resulted in a significant inhibition in Plk1 expression in cells, and subsequently caused a dramatic mitotic cell cycle arrest followed by massive apoptotic cell death, and eventually resulted in a significant decrease in growth and viability of the laryngeal carcinoma cells. Taken together, our present study not only suggests a simple strategy for rapidly screening effective siRNAs against Plk1 but also implicates that Plk1 may serve as a potential therapeutic target in human laryngeal carcinoma. [BMB reports 2010; 43(12): 818-823]
Unactuated Force Control of 5-DOF Parallel Robot Based on Fuzzy PI
Shu-Huan Wen,Wei Zheng,Shi-Dong Jia,Zhi-Xin Ji,Peng-Cheng Hao,Hak-Keung Lam 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.6
This paper investigates the fuzzy position/force hybrid control for a class of 5-degree-of-freedom (DOF) redundantly actuated parallel robots. The position control law is designed based on the proportional-integraldifferential (PID) for the 5-DOF redundantly actuated parallel robot. The fuzzy proportional-integral (PI) redundant actuation force control law is designed based on the position/force hybrid control structure for the 5-DOF redundantly actuated parallel robot. The optimum driving force is obtained in the presence of interference, and the force tracking performance of the fuzzy PI controller is better than the conventional PI controller under the interference condition. Based on the fuzzy position/force hybrid controller, the tracking performance of the closed-loop system for the 5-DOF redundantly actuated parallel robot is improved by using the fuzzy position/force hybrid controller and the interference is eliminated effectively in the control system design. Finally, the co-simulation results of ADAMS and MATLAB/SIMULINK are given to show the effectiveness and advantages of the proposed methodscompared with the conventional PI controller.
이계홍(Ji-Hong Li),전봉환(Bong-Huan Jun),이판묵(Pan-Mook Lee),임용곤(Yong-Kon Lim) 제어로봇시스템학회 2008 제어·로봇·시스템학회 논문지 Vol.14 No.12
This paper presents an asymptotic formation control scheme for a group of underactuated autonomous underwater vehicles (AUVs) where only three control inputs - surge force, yaw moment and pitch moment are available for each vehicle’s six degree of freedom (DOF) underwater motion. Usually, the dynamics agents applied in most of the formation algorithms presented so far have been modeled as particle systems, which is a simple double-integrator system. Therefore, these algorithms cannot be directly applicable to the practical systems, especially to the underwater vehicles whose dynamics are highly nonlinear. Moreover, the vehicles considered in this paper are underactuated. The formation control is derived using general potential function method, and the corresponding potential function consists of two parts: interactions between vehicles and virtual-leader following. Proposed formation scheme guarantees asymptotic local stability of closed-loop system. Numerical simulations are carried out to illustrate the effectiveness of proposed formation scheme.
LED 광통신을 적용한 마스터 암과 수중 매니퓰레이터의 통합 제어
오지윤(Ji-Youn Oh),전봉환(Bong-Huan Jun),최형식(Hyeung-Sik Choi),김준영(Joon-Young Kim),지대형(Dae-Hyeong Ji),손현중(Hyeon-Joong Son),조성원(Sung-Won Jo) 한국해양공학회 2016 韓國海洋工學會誌 Vol.30 No.5
This paper presents the results of a study on the control system for an underwater manipulator controlled by a master arm through LED communication. The underwater manipulator was designed to be actuated by electric motors with six degrees of freedom for operation in various underwater environments. The master arm, which can remotely control the manipulator, was designed with a structure similar to the manipulator for convenient control. An underwater LED communication system was developed to communicate between the master arm and underwater manipulator. An integrated control program was developed that included data conversion, monitoring, datalogging, and filtering. Some experiments were performed to verify the performance of the developed control system of the master arm, manipulator, and LED communication system, and the results are presented