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김종부,신명국,성낙환,최문정,김경주,이동석 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A
This experiment was done to investigate the leaching and adsorption properties of heavy metals on porphyry. The comparison with respect to the leachability of heavy metals from porphyry between the Korea Standard Leaching Test (KSLT) and the Toxicity Characteristic Leaching Procedure (TCLP) was carried out. The fractional composition of leachate and the total concentration of heavy metal of porphyry were studied through Sequential Extraction Procedure (SEP) and EPA Method 3050. Adsorption experiment of porphyry has pointed out that the optimum dosage of porphyry for 50ppm Pb was over 10g/L, the effective particle size for absorption was below 200 mesh and the optimum pH was about 7. From the Freundlich' adsorption equation, l/n was 1.0722, and k was 0.0041. After adsorption, the fractional composition of Pb was changed. The exchangeable, carbonate, reducible fractions were increased, and the organic fraction was not changed, and the residual fraction was decreased.
Mathematical models for manufacturing a novel gear shaper cutter
Shen-Wang Lin,Cheng-Shun Han,Jiu-Bin Tan,Shen Dong 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.1
The design principle and models for novel error-free shaper cutters are discussed to improve the accuracy and service life of gear cutting tools. The modified methods for designing the tooth profile of the shaper cutter are developed by including the inverse envelope method, midpoint-midline method and midpoint-displacement method based on the theory of geometrical reverse problem. The universal mathematical models for manufacturing optimal tooth profile of shaper cutters are presented. The feasibility and reliability of the proposed principle, methods and models are proved by combining the numerical examples with practical application. The design method suggested in this paper is superior to the traditional design scheme, and will be helpful in facilitating the design and manufacture of shaper cutters.
Branded there, made here? How country equity influences fashion product consumers in China
Shen Dong,Liu Feng,Richards Joseph 한국마케팅과학회 2021 Journal of Global Fashion Marketing Vol.12 No.4
After decades of globalization, more and more products are made in a country different from the initial country of origin of the brand name associated with the product. As consumers evaluate brands, does it matter if a product is made in the same country as from its initial origin? In this study, we intend to address this question by examining the impacts of country equity (CE) on consumer psychology, in the context of China’s fashion market. Specifically, this study aims to (1) examine the impact of CE on Chinese consumers’ perception and purchase intention of “Made in USA” products; and (2) identify potential China’s market for “Made in USA” products. A series of hypotheses are developed and empirically tested. Among our major findings, Chinese consumers show significantly higher purchase intention, perceived quality, and perceived price for “Made in USA” products than “Made in China” products with the same brand name. Also, Chinese consumers’ CE of the US significantly affect their purchase intention, perceived quality, and perceived price of “Made in USA” products. In addition, we identify the target market characteristics of “Made in USA” products in China. The study adds to a comprehensive understanding of CE in the global market.
Almost Sure Convergence of ILC for Networked Linear Systems with Random Link Failures
Dong Shen 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.2
The iterative learning control (ILC) problem for networked linear system with random link failure isaddressed in this paper. The link failures arise both from the controller to the plant and from the plant to thecontroller. The random link failure is modeled by an independent Bernoulli random variable. Two P-type updatelaws are designed and critically analyzed. The almost sure convergence property is established according to thiscase for the first time. Illustrative simulations show the effectiveness of the proposed algorithms.
조동수(Dong Soo Cho),김동일(Dong Iel Kim),신윤덕(Yun De Shen),기창두(Chang Doo Kee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
In this paper, the visual tracking system for a moving target is proposed in the biped robot of which the movement of the camera is irregular. Hexagonal Matching Algorithm is used to measure the changes of size, location, and rotation angle for a moving object from its image frame. Also, for enhancing the efficiency of the tracking, we can adaptively adjust the starting point and the size of search area from the image information obtained. Finally, using Affine Transform and Kalman Filter, the position estimation of the moving target is refined against the swing of the camera. Experiments of the moving target tracking were implemented with 20-DOF biped robot using mono vision sensor to prove the reliability of the proposed method.
스케일불변 특징의 삼차원 재구성을 통한 이동 로봇의 상대위치추정
申東范(Dong-Fan Shen),吉世基(Se-Kee Kil),李鍾實(Jong-Shill Lee),柳劑群(Je-Goon Ryu),李應赫(Eung-Hyuk Lee),洪勝弘(Seung-Hong Hong) 대한전기학회 2006 전기학회논문지 D Vol.55 No.4
A key component of autonomous navigation of intelligent home robot is localization and map building with recognized features from the environment. To validate this, accurate measurement of relative location between robot and features is essential. In this paper, we proposed relative localization algorithm based on 3D reconstruction of scale invariant features of two images which are captured from two parallel cameras. We captured two images from parallel cameras which are attached in front of robot and detect scale invariant features in each image using SIFT(scale invariant feature transform). Then, we performed matching for the two image's feature points and got the relative location using 3D reconstruction for the matched points. Stereo camera needs high precision of two camera's extrinsic and matching pixels in two camera image. Because we used two cameras which are different from stereo camera and scale invariant feature point and it's easy to setup the extrinsic parameter. Furthermore, 3D reconstruction does not need any other sensor. And the results can be simultaneously used by obstacle avoidance, map building and localization. We set 20㎝ the distance between two camera and capture the 3frames per second. The experimental results show ±6㎝ maximum error in the range of less than 2m and ±15㎝ maximum error in the range of between 2m and 4m.
Xiang-Dong Shen,Xi Chen,Yuting Jiang,Haixin Ji 한국무역학회 2022 Journal of Korea trade Vol.26 No.8
Purpose – The paper aims to develop the theory of TAM and perceived risk through a more comprehensive and rigorous understanding of the influencing factors of the consumer’s adoption of LG HomNet smart home from the perspective of trade-offs. Design/methodology – Based on the TAM and perceived risk theory, combined with the individual characteristics of consumers in the context of information technology as the external factors of the technology acceptance model, this paper constructs a theoretical model of the factors affecting the use intention of the consumer. It was empirically tested by using SEM, and survey data was collected from 458 respondents. Findings – The research results show that 9 hypotheses of the research model are supported and have reliable prediction accuracy. Consumers’ perceived interest, perceived connectivity and perceived controllability have a significant positive impact on their intention to use. In addition, this paper also confirmed the mediating effect of perceived usefulness and perceived ease of use. Originality/value – Consumers are very concerned about gains and losses. Low-level performance risks, security risks, and financial risks will drive the consumer to have a stronger intention to use, and financial risks have the strongest impact. This research provides a useful implication and guidance for smart home equipment manufacturers and service providers in product and service innovation and marketing and promotion strategies.