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- 저자 : 왕징(Wang Jing) (검색결과 5 건)
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향상된 CSI 거리감쇠 모델을 활용한 무인이동체 실내 거리추정 기법
황준규(Jun Gyu Hwang),왕징징(Jing Jing Wang),이광억(Kwang Eog Lee),박준구(Joon Goo Park) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.8
As expected performances of UAV(Unmanned Aerial Vehicle) become more complex and complicated, required positioning accuracy is becoming more and more higher. Ranging is the core technology in positioning procedures. We focus on indoor ranging problem because indoor environments present many problems for UAV navigation. In this paper, we propose an enhanced indoor ranging method that uses a CSI attenuation model to provide more accurate ranging results.
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데이터 마이닝을 이용한 한의비만변증 설문지 재평가 : 실제 임상에서 수집한 설문응답 기반으로
오지홍(Jihong Oh),왕징화(Jing-Hua Wang),최선미(Sun-Mi Choi),김호준(Hojun Kim) 한방비만학회 2021 한방비만학회지 Vol.21 No.2
Objectives: The purpose of this study is to re-evaluate the importance of questions of obesity syndrome differentiation (OSD) questionnaire based on real-world survey and to explore the possibility of simplifying OSD types. Methods: The OSD frequency was identified, and variance threshold feature selection was performed to filter the questions. Filtered questions were clustered by K-means clustering and hierarchical clustering. After principal component analysis (PCA), the distribution patterns of the subjects were identified and the differences in the syndrome distribution were compared. Results: The frequency of OSD in spleen deficiency, phlegm (PH), and blood stasis (BS) was lower than in food retention (FR), liver qi stagnation (LS), and yang deficiency. We excluded 13 questions with low variance, 7 of which were related to BS. Filtered questions were clustered into 3 groups by K-means clustering; Cluster 1 (17 questions) mainly related to PH, BS syndromes; Cluster 2 (11 questions) related to swelling, and indigestion; Cluster 3 (11 questions) related to overeating or emotional symptoms. After PCA, significant different patterns of subjects were observed in the FR, LS, and other obesity syndromes. The questions that mainly affect the FR distribution were digestive symptoms. And emotional symptoms mainly affect the distribution of LS subjects. And other obesity syndrome was partially affected by both digestive and emotional symptoms, and also affected by symptoms related to poor circulation. Conclusions: In-depth data mining analysis identified relatively low importance questions and the potential to simplify OSD types.
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왕징(Wang-Jing),김지선(Kim, Ji-Sun),이근모(Lee, Keun-Mo) 한국사회체육학회 2021 한국사회체육학회지 Vol.- No.83
Purpose: The purpose of this study is to examine the types and characteristics of leisure constraints of Chinese international students in Korea. Method: This study using the Q methodology was analyzed using 25 Q samples and 25 Chinese international students P samples. Results: First, there were four types of leisure constraints recognized by Chinese international students in Korea. Second, the characteristics of each type were as follows. "Time constraints-I can"t exercise because I"m busy." (Type 1) "Environmental constraints-I prefer traditional Chinese sports and to participate in sports with Chinese people" (Type 2) "Economic and interpersonal constraints – no money, and nobody to participate with." (Type 3) "Language constraints – Studying Korean is the first." (Type 4) Conclusion: There are four types and characteristics of leisure constraints recognized by Chinese international students. Based on the results of this study, it is proposed to develop programs at various levels to overcome the leisure constraints of international students in Korea.
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최은지(Eun Ji Choi),왕징(Jing Wang),윤지환(Ji Hwan Yoon),심상은(Sang Eun Shim),윤주호(Ju Ho Yun),김일(Il Kim) 한국청정기술학회 2011 청정기술 Vol.17 No.1
과학자와 공학자들은 끊임없이 금속, 합금, 고분자, 세라믹 등의 공학재료의 성질을 계속해서 변화하는 사회의 요구에 부응하는 방향으로 개선하여 왔다. 인조 공학재료는 일반적으로 기계적 성질이 우수하여, 자연 재료의 기계적 성질보다 우수한 경우가 많다. 그러나, 이와 같은 공학 재료는 자연계에서 흔히 볼 수 있는 자기치유능력, 즉 고의적인 인간의 접촉을 거치지 않고도 미세 균열을 제거하는 능력이 부족하다. 자연에서 관측할 수 있는 손상관리 패러다임은 여러 가지 종류의 공학재료의 고유 성질을 잘 고려하면 인조 공학재료에서도 성공적으로 재현할 수 있다. 특히 적절한 화학반응과 분자간력을 응용하면 고분자, 아이오노머, 복합체와 같은 유기재료에 적용할 수 있는 다양한 자기치유 방법을 개발할 수 있다. Scientists and engineers have altered the properties of materials such as metals, alloys, polymers, ceramics, and so on, to suit the ever changing needs of our society. Man-made engineering materials generally demonstrate excellent mechanical properties, which often far exceed those of natural materials. However, all such engineering materials lack the ability of selfhealing, i.e. the ability to remove or neutralize microcracks without intentional human interaction. The damage management paradigm observed in nature can be reproduced successfully in man-made engineering materials, provided the intrinsic character of the various types of engineering materials is taken into account. Various self-healing ptotocols that can be applied for the organic materials such as polymers, ionomers and composites can be developed by utilizing suitable chemical reactions and physical intermolecular interactions.
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