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LED背光源中的集成电源型LED模块驱动系统

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现代显示 2007年第11期 30-34页

作者： Sang-Yun Lee chang-Hoon Baek Do-Hun kim hyung-Suk kim Myoung-Soo Choi Bang-Won Oh 张进三星机电有限公司光学部东南大学显示技术研究中心

开发了一种用于液晶显示器的RGB-LED背光源中的新型集成电源型的LED模块(IPLM)驱动系统。传统驱动方案中的DC-DC压降转换电路被集成到了主电源电路中,恒流控制电路被合并到了LED模块中。因此,传统背光源中的这两部分驱动板都被省略了。

关键词： LED背光系统驱动系统降压-升压转换器

Erratum to： Real-time electrical detection of epidermal skin MoS2 biosensor for point-of-care diagnostics

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Nano Research 2017年第3期10卷 I0002-I0002页

作者： Geonwook Yoo Heekyeong Park Minjung kim Won Geun Song Seokhwan Jeong Min hyung kim hyungbeen Lee Sang Woo Lee Young Ki Hong Min Goo Lee Sungho Lee Sunkook kim School of Electronic Engineering Soongsil University Seou106978 Republic of Korea School of Advanced Materials Science & Engineering Sungkyunkwan University Suwon 16419 Republic of Korea Department of Biomedical Engineering Yonsei University Wonju 26493 Republic of Korea Korea Electronics Technology Institute Gyeonggi 13488 Republic of Korea

The second affiliation of the authors in the original version of this article was unfortunately wrongly written on the first page, instead of Multi-Functional Nano/Bio Electronics Lab., Kyung Hee University, Gyeonggi ...

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Quasioptical System of Trao Telescope

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天文研究与技术 1999年第S1期 86-89页

作者： Jong Ae Park 1,2 , Seog Tae Han 1, Tai Seong kim 1, Kwang Dong kim 1, Hyo Ryoung kim 1, Hyun Soo Chung 1, chang Hoon Lee 1, Se hyung Cho 1, Jongmann Yang 2 1. (Taeduk Radio Astronomy Observatory (TRAO), Hwaam dong, Yusung gu Taejon

The quasioptical system of the dual channel receiver is designed and developed for the simultaneous observation with two bands. The frequency independent matching of Gaussian beam is applied to design the quasioptical system with two focusing elements for each band, respectively. The emphasis is on the design to be satisfied with two bands simultaneously. The beam measurement system is also developed to measure the quasioptical system and their components as well as to align the quasioptical elements. We have measured the intensity distributions of the Gaussian beam in the transverse plane and the variations of the beam widths along the propagation axis near the Cassegrain focus. The measured results are also compared the theory.

关键词： Quasioptical System of Trao Telescope

Peroxisome proliferator-activated receptor-delta agonist ameliorated inflammasome activation in nonalcoholic fatty liver disease

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World Journal of Gastroenterology 2015年第45期21卷 12787-12799页

作者： Hyun Jung Lee Jong Eun Yeon Eun Jung Ko Eileen L Yoon Sang Jun Suh Keunhee Kang Hae Rim kim Seoung Hee Kang Yang Jae Yoo Jihye Je Beom Jae Lee Ji Hoon kim Yeon Seok Seo hyung Joon Yim Kwan Soo Byun Department of Internal Medicine Korea University College of Medicine

AIM: To evaluate the inflammasome activation and the effect of peroxisome proliferator-activated receptors(PPAR)-δ agonist treatment in nonalcoholic fatty liver disease(NAFLD) ***: Male C57BL/6J mice were classified according to control or high fat diet(HFD) with or without PPAR-δ agonist(GW) over period of 12 wk [control, HFD, HFD + lipopolysaccharide(LPS), HFD + LPS + GW group]. Hep G2 cells were exposed to palmitic acid(PA) and/or LPS in the absence or presence of ***: HFD caused glucose intolerance and hepatic steatosis. In mice fed an HFD with LPS, caspase-1 and interleukin(IL)-1β in the liver were significantly increased. Treatment with GW ameliorated the steatosis and inhibited overexpression of pro-inflammatory cytokines. In Hep G2 cells, PA and LPS treatment markedly increased m RNA of several nucleotide-binding andoligomerization domain-like receptor family members(NLRP3, NLRP6, and NLRP10), caspase-1 and IL-1β. PA and LPS also exaggerated reactive oxygen species production. All of the above effects of PA and LPS were reduced by GW. GW also enhanced the phosphorylation of AMPK-α.CONCLUSION: PPAR-δ agonist reduces fatty acidinduced inflammation and steatosis by suppressing inflammasome activation. Targeting the inflammasome by the PPAR-δ agonist may have therapeutic implication for NAFLD.

关键词： Nonalcoholic fatty liver disease Nonalcoholic stea

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反渗透抗污染膜(英文)

反渗透抗污染膜(英文)

CBOE Volatility Index Forecasting under COVID-19:An Integrated BiLSTM-ARIMA-GARCH Model

加速膜科技成果转化，推动膜工业持续发展——第二届中国膜科学与技术报告会

作者： Ja - young Koo Sung Pyo Hong Hoon hyung Young Hun kim Sungro Yoon Soon Sik kim Filter Business Division Saehan Industries Inc1 Jungsandong Kyungsan cityKyungsangbukdoKorea

我们采用具有选择性的分离膜从溶液中分离溶质,溶质可能是可溶性的或者是不可溶而悬浮的.这些分离膜依次以孔径递增顺序排列为:RO膜(反渗透透膜),UF膜(超滤膜),MF膜(微滤膜).PO膜允许水通过,但是拒绝盐和分子量大于100的有机物通过.RO...

我们采用具有选择性的分离膜从溶液中分离溶质,溶质可能是可溶性的或者是不可溶而悬浮的.这些分离膜依次以孔径递增顺序排列为:RO膜(反渗透透膜),UF膜(超滤膜),MF膜(微滤膜).PO膜允许水通过,但是拒绝盐和分子量大于100的有机物通过.RO膜通常用于苦咸水和海水淡化.然而,在膜有应用过程中,一个主要的问题是溶质对膜的污染,自然界中的水、工业污水以及市政废水等都可以污染膜.在使用过程中,污染物沉积在膜表面,减少了水通量同时也降低了脱盐率.因此我们所需要对污染物具有抵抗性的分离膜.污染物通过疏水性致使它吸附在膜表面,或者溶质和膜表面之间的电荷吸引导致膜的污染还包括胶体对膜的污染.这篇文章主要讲述新型污染反渗透膜,它更具亲水性,膜表面电性更接近于电中性,即与污染物具似电性从而降低了疏水性和电荷相吸性,或者说提高了电荷相互排斥性.韩国世韩公司最新开发出的抗污染膜通过聚合,交联在膜表面形成水涂层.将抗污染膜与普通反渗透膜分别放入30 ppm牛奶,50 ppm阳离子表面剂,50 ppm非离子表面活性剂,50 ppm腐殖酸中,抗污染膜具有更少的流量衰减.涂层膜具有两个特征:表面电荷(Zeta电性)和疏水程度(接触角度).涂层膜比滑涂层的膜的负电性更弱,亲水角度更小.用不同的涂层化合物可以控制膜表面的电荷.带有不同表面电荷的膜在做亚甲基蓝阳离子染色是由于带有更多的负电荷,被其它阳离子表面活性剂污染的膜同样地与负荷呈线性关系.被阴离子表现活性剂和腐殖酸污染的膜与污染物和膜之间的疏水程度有关系.被奶粉污染的膜是由疏水作用,电荷作用和一些胶体附着物对它造成污染.在现代汽车厂用8040膜做实验,40天内,在进水都是工业废水的条件下,抗污染膜比普通膜具有更高的连续透水性.在三星工厂,抗污染膜在处理废水方面已成功地运行了5个月以上.

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来源： cnki会议评论

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Computer Systems Science & Engineering 2023年第10期47卷 121-134页

作者： Min hyung Park Dongyan Nan Yerin kim Jang Hyun kim Department of Applied Artificial Intelligence Sungkyunkwan UniversitySeoul03063Korea Department of Human-Artificial Intelligence Interaction Sungkyunkwan UniversitySeoul03063Korea Department of Interaction Science Sungkyunkwan UniversitySeoul03063Korea

After the outbreak of COVID-19,the global economy entered a deep *** observation is supported by the Volatility Index(VIX),which reflects the market risk expected by *** the current study,we predicted the VIX using variables obtained fromthe sentiment analysis of data on Twitter posts related to the keyword“COVID-19,”using a model integrating the bidirectional long-term memory(BiLSTM),autoregressive integrated moving average(ARIMA)algorithm,and generalized autoregressive conditional heteroskedasticity(GARCH)*** Linguistic Inquiry and Word Count(LIWC)program and Valence Aware Dictionary for Sentiment Reasoning(VADER)model were utilized as sentiment analysis *** results revealed that during COVID-19,the proposed integrated model,which trained both the Twitter sentiment values and historical VIX values,presented better results in forecasting the VIX in time-series regression and direction prediction than those of the other existing models.

关键词： Forecasting VIX sentiment analysis COVID-19 ARIMA GARCH bidirectional LSTM

Dual channel SIS Receiver of Trao Telescope

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天文研究与技术 1999年第S1期 82-85页

作者： Jong Ae Park 1,2 , Seog Tae Han 1, Tai Seong kim 1, Kwang Dong kim 1, Hyo Ryoung kim 1, Hyun Soo Chung 1, Jae Hoon Jung 1, chang Hoon Lee 1, Se hyung Cho 1, Jongmann Yang 2 1. Taeduk Radio Astronomy Observatory (TRAO), Hwaam dong,

We have developed the dual channel receiver with 100GHz and 150GHz band, which is used to make the simultaneous observation with two bands. The SIS mixers are used in both bands. The constructed dewar for receiver has the performance with the vacuum of 10 -8 Torr and the temperature of 4 2K. The receiver noise temperature is 50K (DSB) for 100GHz band and 80K (DSB) for 150GHz band ,respectively. In order to achieve the simultaneous observations, the quasioptical system is precisely designed, and also evaluated by the measurement in the laboratory. We have observed the various sources using this receiver since October 1998. The relative pointing offset between two bands is 3″.

关键词： SIS Dual channel SIS Receiver of Trao Telescope

Magnifying endoscopy for the diagnosis of specialized intestinal metaplasia in short-segment Barrett's esophagus

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World Journal of Gastroenterology 2013年第41期19卷 7089-7096页

作者： Nam Seok Ham Jae Young Jang Sung Woo Ryu Ji Hye kim Eui Ju Park Woong Cheul Lee Kwang Yeun Shim Soung Won Jeong Hyun Gun kim Tae Hee Lee Sung Ran Jeon Jun hyung Cho Joo Young Cho So Young Jin Ji Sung Lee Institution for Digestive Research Digestive Disease CenterDepartment of Internal MedicineSoonchunhyang University HospitalSeoul 140-743South Korea Department of Pathology Soonchunhyang University HospitalSeoul 140-743South Korea Biostatistical Consulting Unit Soonchunhyang University HospitalSeoul 140-743South Korea

AIM:To determine whether magnified observation of short-segment Barrett’s esophagus(BE)is useful for the detection of specialized intestinal metaplasia(SIM).METHODS:Thirty patients with suspected short-segment BE underwent magnifying endoscopy up to×*** magnified images were analyzed with respect to their pit-patterns,which were simultaneously classified into five epithelial types[Ⅰ(small round),Ⅱ(straight),Ⅲ(long oval),Ⅳ(tubular),Ⅴ(villous)]by Endo’s ***,a 0.5%solution of methylene blue(MB)was sprayed over columnar *** patterns of the magnified image and MB staining were *** were obtained from the regions previously observed by magnifying endoscopy and MB ***:Three of five patients with a typeⅤ(villous)epithelial pattern had SIM,whereas 21 patients with a non-typeⅤepithelial patterns did not have *** sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of pit-patterns in detecting SIM were 100%,91.3%,92.3%,60%and100%,respectively(P=0.004).Three of the 12 patients with positive MB staining had SIM,whereas 14patients with negative MB staining did not have *** sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of MB staining in detecting SIM were 100%,60.9%,65.4%,25%and100%,respectively(P=0.085).The specificity and accuracy of pit-pattern evaluation were significantly superior compared with MB staining for detecting SIM by comparison with the exact McNemar’s test(P=0.0391).CONCLUSION:The magnified observation of a shortsegment BE according to the mucosal pattern and its classification can be predictive of SIM.

关键词： Short-segment Barrett’s esophagus Magnifying endoscopy Methylene blue chromoendoscopy Specialized intestinal metaplasia Dysplasia Esophageal adenocarcinoma Diagnosis

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微型凹版胶印中液体转移过程的仿真研究

中国印刷与包装研究 2009年第1期1卷 105-106页

作者： Author Wei-Xi Huang Seung-Hyun Lee hyung Jin Sung Taik-Min Lee Dong-Soo kim Department of Mechanical Engineering Korea Advanced Institute of Science and Technology 373-1 Guseong-dongYuseong-gu Daejeon 305-701 Republic of Korea Intelligence and Precision Machinery Research Division Korea Institute of Machinery and Materials 171 Jang-dongYuseong-gu Daejeon 305-343 Republic of Korea

本文通过数字建模方式对凹版胶印过程中的液体转移过程进行研究。具体方法是,用两个相互平行的印版间液体的转移过程模拟在硅橡胶辊或软垫的作用下油墨转移到承印物上的过程;用梯形网穴与其上方运动的印版间的液体转移过程模拟油墨从凹... 详细信息

本文通过数字建模方式对凹版胶印过程中的液体转移过程进行研究。具体方法是,用两个相互平行的印版间液体的转移过程模拟在硅橡胶辊或软垫的作用下油墨转移到承印物上的过程;用梯形网穴与其上方运动的印版间的液体转移过程模拟油墨从凹版网穴拉出并转移到硅橡胶辊或软垫上的过程。阐释在两平行印版间的液体转移过程中,液体的拉伸、分裂,以及反冲过程,同时观察卫星式液滴的产生,评估分离速度、液体黏度、表面张力、重力以及接触角对液体转移过程的影响。研究液体从梯形网穴转移到其上方运动的印版中的3个阶段:1)整体拉伸阶段;2)中央拉伸、分裂、以及反冲阶段;3)平衡阶段。找出转移液体的最终幅宽与上部印版的接触角的关系,分析剪切高度的影响因素。本文还对初始距离和网穴形状对液体转移的影响进行了探讨。

关键词：凹版胶印液体转移数字仿真自由表面流接触角表面张力