소셜 미디어에서의 MBTI 성격 유형별 관심 주제 차이 분석

WU YUHANG,LI WENQI 한국정보기술학회 2023 Proceedings of KIIT Conference Vol.2023 No.6

소셜 미디어 뉴스 제목의 잠재 주제 - LDA 모델을 기반으로 한 분석 -

WU YUHANG,LI WENQI 한국방송학회 2023 한국방송학회 학술대회 논문집 Vol.2023 No.11

텍스트 마이닝을 활용한 애플리케이션 사용자 리뷰 분석 - 인스타그램과 페이스북을 중심으로

WU YUHANG,LI WENQI,TAO ZEJIN,CUI RAN 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.12

사용자의 취향과 의견은 텍스트 리뷰를 통해 느낌과 경험을 보여주며, 이러한 텍스트 리뷰는 프로그램 응용 사용자 경험을 개선하는 데 도움이 된다. 온라인 텍스트 리뷰는 소셜 미디어 회사의 관심을 끌 뿐만 아니라 앱 구매에 대한 고객 선호도에도 영향을 미친다. 그래서 이 글은 인스타그램과 페이스북을 분류하여 두 앱 사용자들의 리뷰를 모았다. 분류 결과는 전처리 된 텍스트 데이터를 사용하여 LDA의 주제 분류 모델을 사용하여 시각화되었다. 연구 결과에 따르면 앱 사용에 대한 사용자의 전반적인 만족도를 평가하고 소비자의 선택성을 볼 수 있으며, LDA 분석 및 모델링 결과를 사용하여 최상의 모델 효과를 찾을 수 있다. Online text reviews attract the attention of social media companies while influencing customer preferences for purchasing applications. Therefore this work collected comments from users of both applications, focusing on INS and Facebook. By using the pre-processed text data, the classification results were visualized using LDAs topic classification model. Based on the results of the study, we were able to assess the overall satisfaction of users using the app and see the selectivity of consumers, in addition, we used the results of the LDA analysis and modeling to find the best model results.

Customer Voice at Starbucks: An SVM-based Sentiment Analysis Perspective

( Yuhang Wu ),( Wenqi Li ) 한국감성과학회 2023 한국감성과학회 국제학술대회(ICES) Vol.2023 No.-

This study presents a comprehensive sentiment analysis of customer reviews pertaining to Starbucks, employing the Support Vector Machine (SVM) model. Our findings underscore the model's notable proficiency in discerning negative feedback, thus functioning as a vital tool for enterprises to comprehend customer sentiments in real-time. The insights gleaned from our research extend beyond Starbucks, offering valuable insights for diverse businesses aiming to leverage customer feedback for service enhancement and strategic decision-making. Looking ahead, the potential integration of deep learning techniques holds promising prospects for further enhancing sentiment analysis capabilities.

기계 학습을 기반으로 한 뉴스 제목의 감정 분석 연구

우위항(YUHANG WU),친정(ZHENG CHEN),최염(RAN CUI),서가맹(JIAMENG XU) 한국정보기술학회 2023 Proceedings of KIIT Conference Vol.2023 No.11

Research on Vehicle-Induced Vibration of Pedestrian Bridge and Its Application in Comfort Evaluation

Zhao Rui,Wu Yuhang,Dan Danhui 한국강구조학회 2024 International Journal of Steel Structures Vol.24 No.1

The vibration responses of pedestrian bridges are mainly caused by two transmission routes of ground and airfl ow under vehicle excitation. In order to clarify the action mechanism and infl uence degree of ground excitation and airfl ow excitation on pedestrian bridges, based on stochastic theory and fl ow fi eld analysis method, the calculation models of vehicle-induced ground excitation and airfl ow excitation considering the infl uence of vehicle length, vehicle width and bridge deck width are established respectively. Considering the eff ects of vehicle speed, road grade, and vehicle mass, the vibration response of a continuous steel box girder pedestrian bridge under the two transmission routes was analyzed in this study. The laws of vibration acceleration and stress were summarized, and the accuracy of the fi nite element model and the laws were verifi ed by fi eld-measured data. Results show that road grade and vehicle mass are the main factors causing the vibrations of pedestrian bridges under vehicle excitation. Vehicle speed has a great infl uence on structural vibration under airfl ow excitation. The vibration response is the largest at mid-span along the pedestrian bridge-length direction. When the vehicle speed is less than about 60 km/h, the infl uence of the airfl ow excitation on the structure may not be considered. On this basis, the comfort level of the pedestrian bridge was evaluated using the British Standards Institution. The given evaluation criteria of the pedestrian bridge complement the design regulations of the pedestrian bridge.

텍스트마이닝을 이용한 현대 자동차 중국 시장 소비자 만족도 분석 연구: 다른 브랜드와의 비교

CUI RAN,CHEN ZHENG,WU YUHANG,XU JIAMENG 한국방송학회 2023 한국방송학회 학술대회 논문집 Vol.2023 No.11

In Situ Formation of Pt–Au Nanoparticles on Magnetic Composites Carriers: Tuning Catalytic Activity by Incorporation of Different Metal Oxides

Zewu Zhang,Qiong Wu,Xiaohai Bu,Zusheng Hang,Zhangzhong Wang,Qikang Wang,Yuhang Ma 대한화학회 2018 Bulletin of the Korean Chemical Society Vol.39 No.1

Supported Pt─Au bimetal nanocatalysts have been prepared by an in situ reduction method followed by calcination in air and reduction in H2 atmosphere. The catalysts exhibit a typical yolk-shell construction composed of a moveable magnetic Fe core and metal oxides shells decorated with Pt─Au nanoparticles. The structure of the bimetal nanocatalysts was characterized in detail by TEM, XRD, XPS, and N2 physical adsorption and the catalytic activity of the nanocatalysts was studied by the catalytic reduction of 4-nitrophenol to 4-nitrophenol. It is found that the bimetal nanocatalysts composed with the different metallic oxides (TiO2 and ZrO2) exhibited the comparable Pt─Au particles size (~10 nm). However, the content of Pt─Au nanoparticles was varied with the metallic oxides support. Pt─Au nanoparticles deposited uniformly on TiO2 with higher loadings, however the nanoparticles on ZrO2 exhibited remarkably lower content, which should be attributed to the abundant hydroxyl on TiO2 surface that served as the deposition site for Pt─Au nanoparticles. The result of the reduction reaction indicated that incorporation of TiO2 in the bimetal Pt─Au nanocatalyst could significantly improve the catalytic activity as compared with ZrO2 and m-SiO2. A possible mechanism was proposed to explain the synergistic effect in the supported Pt─Au bimetal nanocatalysts.

The characteristic analysis of the operational overvoltage caused by the vacuum circuit breakers on High-speed trains

Xiao Song,Tong Mengyuan,Rao Yang,Li Yuhang,Ye Zhizong,Shen Yixiang,Hou Hao,Gao Guoqiang,Wu Guangning,Jin Yaoyao,Zhou Jie,Liu Jie 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1

Along with the operating velocity and traction power increasing continuously, the issue related to the safety and reliability of the high-voltage traction power system for high-speed trains have gradually been exposed during the practical service process. When the train passes a neutral section settled roughly per 15 km between two neighboring substations, the on-board vacuum circuit breaker (VCB) must to be operated for changing the input powers with diff erent phases. At the moment of switching on or off the VCB, the arc between the contacts in the arc-extinguishing chamber may be triggered, which tends to result in the operational overvoltage. Due to numerous inductances and capacitances existing in the traction power supply system, the overvoltage may lead to high-frequency electromagnetic oscillation spreading along the transmission routes. The on-board high-voltage equipments within the power supply system may suff er from the impulse brought from the VCB operational overvoltage frequently, which is possible to cause the insulation aging or breakdown issue. To investigate the characteristic of the operational overvoltage of VCBs, a ‘train-rail-catenary’ power supply model is built based on the measured impedance parameters, which has been verifi ed by the experimental tests. The generating mechanism with the infl uence factors of the operational overvoltage when switching on or off the VCB has been explored, meanwhile the distribution of the train body overvoltage on each carriage has also been presented.

Rutin alleviated lipopolysaccharide-induced damage in goat rumen epithelial cells

Zhan Jinshun,Gu Zhiyong,Wang Haibo,Liu Yuhang,Wu Yanping,Huo Junhong 아세아·태평양축산학회 2024 Animal Bioscience Vol.37 No.2

Objective: Rutin, also called vitamin P, is a flavonoids from plants. Previous studies have indicated that rutin can alleviate the injury of tissues and cells by inhibiting oxidative stress and ameliorating inflammation. There is no report on the protective effects of rutin on goat rumen epithelial cells (GRECs) at present. Hence, we investigated whether rutin can alleviate lipopolysaccharide (LPS)-induced damage in GRECs. Methods: GRECs were cultured in basal medium or basal medium containing 1 μg/mL LPS, or 1 μg/mL LPS and 20 μg/mL rutin. Six replicates were performed for each group. After 3-h culture, the GRECs were harvested to detect the relevant parameters. Results: Rutin significantly enhanced the cell activity (p<0.05) and transepithelial electrical resistance (TEER) (p<0.01) and significantly reduced the apoptosis rate (p<0.05) of LPSinduced GRECs. Rutin significantly increased superoxide dismutase, glutathione peroxidase, and catalase activity (p<0.01) and significantly decreased lactate dehydrogenase activity and reactive oxygen species and malondialdehyde (MDA) levels in LPS-induced GRECs (p<0.01). The mRNA and protein levels of interleukin 6 (IL-6), IL-1β, and C-X-C motif chemokine ligand 8 (CXCL8) and the mRNA level of tumor necrosis factor-α (TNF-α) and chemokine C-C motif ligand 5 (CCL5) were significantly increased in LPS-induced GRECs (p<0.05 or p<0.01), while rutin supplementation significantly decreased the mRNA and protein levels of IL-6, TNF-α, and CXCL8 in LPS-induced GRECs (p<0.05 or p<0.01). The mRNA level of toll-like receptor 2 (TLR2), and the mRNA and protein levels of TLR4 and nuclear factor κB (NF-κB) was significantly improved in LPS-induced GRECs (p<0.05 or p<0.01), whereas rutin supplementation could significantly reduce the mRNA and protein levels of TLR4 (p<0.05 or p<0.01). In addition, rutin had a tendency of decreasing the protein levels of CXCL6, NF-κB, and inhibitor of nuclear factor kappa-B alpha (0.05< p<0.10). Rutin could significantly decreased interferon regulatory factor 3 mRNA expression in LPS-induced GRECs (p<0.05), whereas interferon induced protein with tetratricopeptide repeats 3 (IFIT3) and toll-interacting protein (TOLLIP) mRNA expression was not significantly different between the groups. LPS reduced the tight junction protein zonula occludin 1 (ZO-1) level in GRECs whereas rutin enhanced it. Rutin significantly improved tight junction protein Claudin-1 mRNA expression in LPS-induced GRECs (p<0.01), but could not affect tight junction protein Occludin mRNA expression. Conclusion: Rutin alleviated LPS-induced barrier damage in GRECs by improving oxidation resistance and anti-inflammatory activity, which may be related to TLR/NF-κB signaling pathway inhibition.