An Adaptive Sliding Mode-Like P-type Iterative Learning Control for Robot Manipulators

Yi Long,Zhijiang Du,Weidong Wang 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10

Iterative learning control(ILC) is used to track the trajectory of repetitive motion, especially for industrial robot. The proposed control scheme is based upon the feedback of tracking error and corresponding change rate, which construct a switching surface, with the use of a proportional structure, for which it is called sliding mode-like P-type ILC. In addition, an adaptive item was added to not only cope with the unknown parameters and disturbances but also. remove chatter phenomenon happening in control process. To verify the proposed control law, a conventional PD ILC and an adaptive PD ILC are added as comparison with all the same setting conditions. We use root mean square error (RSME) each iteration trial as performance evaluation index. Finally, simulation results are provided to illustrate the effectiveness of the proposed controller. As a result, it can achieve better performance.

A Robust and Accurate Traveltime Calculation from Frequency-domain Two-way Wave-equation Modeling Algorithm

Qin, Yilong,Zhang, Zhongjie,Shin, Changsoo,Ko, Seungwon,Seo, Youngtak,Han, Uk,Chen, Yun 한국암반공학회 2004 Geosystem engineering Vol.7 No.1

We improve the accuracy and stability of traveltime calculation method using frequency-domain modeling algorithm. We perform a parameter analysis to obtain the optimum combination of frequency and damping factor and thus improve the accuracy of traveltime. Then we obtain the empirical formula for our numerical algorithm. Lastly, we propose the adaptive frequency and the adaptive damping factor for an inhomogeneous model to eliminate the distortion in the traveltime contour. Two-dimensional numerical examples verify that the proposed algorithm gives a much smaller traveltime error and a better traveltime contour for the complex model. Compared to the other two methods, this algorithm computes traveltime that is close to a directly transmitted wave. We demonstrated our algorithm on 2D IFP Marmousi models, and the numerical results show that our algorithm is a faster traveltime calculation method of a directly transmitted wave for imaging the subsurface and transmission tomography.

Anisotropic Nanocomposite Nd₂Fe<SUB>14</SUB>B/α-Fe Magnets Prepared by Spark Plasma Sintering

Ma Yilong,Liu Ying,Li Jun,Du Huilong 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

중국내 글로벌 화장품 기업의 통합적 마케팅 커뮤니케이션(IMC) 활동이 브랜드 이미지와 구매의도에 미치는 영향

이일용 ( Li Yilong ),임달호 ( Lim Dalho ) 한국유통경영학회(구 한국유통정보학회) 2017 유통경영학회지 Vol.20 No.4

글로벌 화장품을 사용해 본 경험이 있는 소비자를 대상으로 통합적 마케팅커뮤니케이션 활동이 중국소비자의 브랜드이미지와 구매의도에 어떤 영향을 미치는지 확인하였다. 또한 원산지이미지에 따라 차이가 있는지를 검증하였다. 통합적 마케팅커뮤니케이션(IMC)활동에 대한 광고, 인적판매, 퍼블리시티, 온라인 구전이 브랜드이미지에 긍정적인 영향을 미친다. 중국소비자에게 온라인 구전이 다른 독립변수와 비교하여 상대적으로 가장 많은 영향을 미치고 있다는 것을 확인하였다. 브랜드이미지가 구매의도에 대해 긍정적인 영향을 미치는 것으로 나타났다. 통합적 마케팅커뮤니케이션(IMC)활동에 대한 광고, 인적판매, 퍼블리시티, 온라인 구전이 구매의도에 긍정적인 영향을 미친다. IMC활 동이 브랜드이미지에 영향을 미치는 과정에서 원산지이미지의 조절역할을 검증하였고, 브랜드이미지와 구매의도 사이도 원산지이미지가 조절변수 역할을 하는지 알아본 결과 조절효과는 가지지 못하는 것으로 나타났다. This study is to investigate the effect of integrated marketing communication activities on Chinese consumers` brand image and purchase intention of consumers who have experienced using global cosmetics. And it is verified whether there is any difference of influence according to the country of origin. First, advertising, sales, publicity, and online reputation have a positive effect on brand image. Second, online reputation has the greatest impact on brand image compared to other factors. Third, brand image has a positive effect on purchase intention. Fourth, advertising, sales, publicity, and online reputation have a positive effect on purchase intention. Last, the effect of IMC activity on the brand image was verified as the control role of country of origin and there is no adjustment effect between the brand image and the purchase intention.

Synthesis and Electrochemical Characterization of Ni-B/ZIF-8 as Electrode Materials for Supercapacitors

Zhen Li,Yilong Gao,Jianxiang Wu,Wei Zhang,Yueyue Tan,Bohejin Tang 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.5

Ni-B/Zeolitic Imidazolate Frameworks-8 (Ni-B/ZIF-8) is synthesizedvia a series of solvothermal, incipient wetness impregnation andchemical reduction methods. The ZIF-8 serves as the host for thegrowth of Ni-B forming a Ni-B/ZIF-8 composite. Characterizationby X-ray diffraction and Transmission electron microscope revealsthe dispersion of Ni-B in ZIF-8. As electrode materials forsupercapacitors, ZIF-8, Ni-B and Ni-B/ZIF-8 electrodes exhibitspecific capacitances of 147, 563 and 866 F g−1, respectively at ascan rate of 5 mV s−1 and good stability over 500 cycles. Inparticular, Ni-B/ZIF-8 is a promising material for supercapacitors.

Type 2 Diabetes Induces Prolonged P-wave Duration without Left Atrial Enlargement

Bin Li,Yilong Pan,Xiaodong Li 대한의학회 2016 Journal of Korean medical science Vol.31 No.4

Prolonged P-wave duration has been observed in diabetes. However, the underlying mechanisms remain unclear. The aim of this study was to elucidate the possible mechanisms. A rat model of type 2 diabetes mellitus (T2DM) was used. P-wave durations were obtained using surface electrocardiography and sizes of the left atrium were determined using echocardiography. Cardiac inward rectifier K+ currents (Ik1), Na+ currents (INa), and action potentials were recorded from isolated left atrial myocytes using patch clamp techniques. Left atrial tissue specimens were analyzed for total connexin-40 (Cx40) and connexin-43 (Cx43) expression levels on western-blots. Specimens were also analyzed for Cx40 and Cx43 distribution and interstitial fibrosis by immunofluorescent and Masson trichrome staining, respectively. The mean P-wave duration was longer in T2DM rats than in controls; however, the mean left atrial sizes of each group of rats were similar. The densities of Ik1 and INa were unchanged in T2DM rats compared to controls. The action potential duration was longer in T2DM rats, but there was no significant difference in resting membrane potential or action potential amplitude compared to controls. The expression level of Cx40 protein was significantly lower, but Cx43 was unaltered in T2DM rats. However, immunofluorescent labeling of Cx43 showed a significantly enhanced lateralization. Staining showed interstitial fibrosis was greater in T2DM atrial tissue. Prolonged P-wave duration is not dependent on the left atrial size in rats with T2DM. Dysregulation of Cx40 and Cx43 protein expression, as well as fibrosis, might partly account for the prolongation of P-wave duration in T2DM.

중국의 염방채 선택속성과 SNS 정보특성이 브랜드 충성도에 미치는 영향: 소비자 만족도 매개효과를 중심으로

김은희,Chen Yilong 사단법인 미래융합기술연구학회 2022 아시아태평양융합연구교류논문지 Vol.8 No.1

YanBang Dishes is a traditional food enjoyed by the citizens of Zigong, Sichuan, China. Therefore, in this study, it was verified whether the attribute of selecting YanBang Dishes, a traditional food representing Tsugong City, and the characteristics of SNS information that can confirm and share YanBang Dishes information had a positive (+) effect on consumer satisfaction and brand loyalty. The respondents of the study consisted of consumers who have eaten YanBang Dishes within the last 6 months among residents of Zigong City, Sichuan Province. For statistical analysis, frequency analysis, factor analysis, multiple regression analysis, and mediation regression analysis were performed. As a result of checking the YanBang Dishes selection attributes, four factors were derived: quality, tradition, service, and relevance. The SNS information characteristics were derived as reliability, interactivity, usefulness, and up-to-datedness. The results of testing the research hypothesis with the above factors are as follows. First, it was confirmed that the YanBang Dishes selection attribute had a positive (+) effect on consumer satisfaction and brand loyalty. Second, it was confirmed that SNS information characteristics had a positive (+) effect on consumer satisfaction and brand loyalty. Third, it was confirmed that customer satisfaction had a positive (+) effect on brand loyalty. Fourth, among the selection attribute factors of YanBang Dishes, service and appropriateness completely mediate on consumer satisfaction and have a positive (+) effect on brand loyalty. First, as a result of checking the YanBang Dishes selection attributes, four factors were derived: quality, tradition, service, and relevance. SNS information characteristics were derived as reliability, interactivity, usefulness, and up-to-dateness. The results of testing the research hypothesis with the above factors are as follows. First, it was confirmed that the YanBang Dishes selection attribute had a positive (+) effect on consumer satisfaction and brand loyalty. Second, it was confirmed that SNS information characteristics had a positive (+) effect on consumer satisfaction and brand loyalty. Third, it was confirmed that customer satisfaction had a positive (+) effect on brand loyalty. Fourth, among the selection attribute factors of YanBang Dishes, service and appropriateness completely mediate on consumer satisfaction and have a positive (+) effect on brand loyalty. 중국 쓰촨성 쯔궁지역의 전통음식 염방채를 선택하는 속성과 염방채 정보를 제공하는 SNS 특성이 소비자 만족도와 브랜드 충성도에 미치는 영향을 확인하였다. 응답자 표본은 최근 6개월 이내 염방채를 먹어 본 소비자들이다. 연구가설 검증 결과는 다음과 같다. 첫째, 염방채 선택속성과 SNS 정보특성은 소비자 만족도와 브랜드 충성도에 정(+)의 영향을 미치는 것으로 확인하였다. 둘째, 소비자 만족도는 브랜드 충성도에 정(+)의 영향을 미치는 것으로 확인하였다. 셋째, 염방채의 선택속성 요인 중 서비스와 적절성은 소비자 만족도에 완전 매개하여 브랜드 충성도에 정(+)의 영향을 미치는 것으로 확인하였다. 그러나 염방채의 선택속성 중 품질과 전통성은 소비자 만족도에 부분 매개하여 브랜드 충성도에 정(+)의 영향을 미치는 것으로 확인하였다. 넷째, SNS 정보특성 요인 중 신뢰성과 최신성은 소비자 만족도에 완전 매개하여 브랜드 충성도에 정(+)의 영향이 미치는 것으로 확인하였다. 그러나 SNS 정보특성 요인 중 상호작용성과 유용성은 소비자 만족도를 부분 매개하여 브랜드 충성도에 정(+)의 영향이 미치는 것으로 확인하였다. 이상의 연구는 중국의 전통음식인 염방채 선택속성과 염방채 정보를 얻고 소통하는 SNS정보특성이 소비자 만족도를 매개하여 염방채 브랜드 충성도에 영향이 미친다는 것을 검증하였다는 학문적 함의를 갖는다. 또한 전통음식으로써 염방채 브랜드를 활성화 시킬 수 있는 실무적 시사점을 제안하였다는 것에 의의가 있다.

Analysis and Experimental Validation of a Space-Vector-Modulation Algorithm for Four-Leg Active Power Filter

Zhenfeng Xiao,Yilong Chen,Rongxiang Yuan,Xiangtian Deng 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.4

SEARCHING FOR MORE INNOVATIVE CAPABILITIES : THE CASE OF ZHONG'GUANCUN, CHINA

WANG, JICI,CHEN, YILONG Institute for Social Development and Policy Resear 1998 Development and Society Vol.27 No.1

This paper seeks to examine the agglomeration of new-tech facilities in Beijing, and to present new perspectives for rethinking local development policies relating to the tasks facing the Beijing municipal government and their attendant requirements. The main body of the paper is divided into four sections. The first section introduces the development of the Zhong’guancun new-tech center in Beijing. The second section illustrates the prospect of a local innovation milieu in the Zhong’guancun area, which offer a promising sign of a growing trend toward local networking. The third section turns to examining symptoms of weak local innovation milieu in response to exogenous changes caused by globalization. The fourth section analyzes the logic behind polices promoting local innovation networks. In conclusion, the paper raises some suggestions for bringing local actors together for discussion.

SEARCHING FOR MORE INNOVATIVE CAPABILITIES

JICI WANG(왕즈츠),YILONG CHEN(천이룽) 서울대학교 사회발전연구소 1998 Journal of Asian Sociology Vol.27 No.1