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SHP gains citizenship of the AMPk kingdom

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Cellular & Molecular Immunology 2011年第6期8卷 450-452页

作者： Hun-Taeg chung School of Biological Sciences University of UlsanMetaInflammation Basic Research LaboratoryUlsanKorea

Various cytokines and chemokines are produced as a result of signaling through innate immune *** signaling is initiated by host–pathogen interactions in which the host’s germline-encoded pattern recognition receptors,including Toll-like receptors(TLRs),recognize conserved microbial structures termed pathogen-associated molecular *** are broadly distributed in immune cells and are responsible for eliciting innate responses and enhancing adaptive immunity to *** 12 members of the TLR family in mammals are characterized by an extracelluar leucine-rich repeat domain and an intracellular Toll/IL-1 receptor domain.

关键词： immunity cytokines initiated

Nondriven Polymer Translocation Through a Nanopore: Scaling for Translocation Time with Chain Length

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Chemical Research in Chinese Universities 2011年第6期27卷 1023-1026页

作者： SUN Chia-chung State key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University

we investigated the dynamics of the passage for a polymer chain through a nanopore in the absence of any external driving force with weeks-Chandler-Andersen potential in two-dimensional simulations, in particular, focused our attention on the scaling law of the mean translocation time. we found that the effect of hydrodynamic interactions is the major factor in determining the scaling exponents with increasing pore size. The scaling close to N1＋2v was observed when the hydrodynamic interactions were screened in the cases of small pore sizes, while the scaling close to N3v was obtained when the hydrodynamic interactions were present in the cases of large pore sizes.

关键词： Translocation Nondriven Hydrodynamic interaction

The geometry of the moduli space of one-dimensional sheaves

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Science China Mathematics 2015年第3期58卷 487-500页

作者： CHOI Jinwon chung kiryong School of Mathematics Korea Institute for Advanced Study

Let Md be the moduli space of stable sheaves on P2with Hilbert polynomial dm+*** this paper,we determine the effective and the nef cone of the space Md by natural geometric *** idea is to use the wall-crossing on the space of Bridgeland stability conditions and to compute the intersection numbers of divisors with curves by using the Grothendieck-Riemann-Roch *** also present the stable base locus decomposition of the space *** a byproduct,we obtain the Betti numbers of the moduli spaces,which confirm the prediction in physics.

关键词： effective cone nef cone birational morphism determinant line bundle Bridgeland wall-crossing

How does innovation's tail risk determine marginal tail risk of a stationary financial time series?

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Science China Mathematics 2004年第3期47卷 321-338页

作者： YU Bosco w. T. PANG w. k. Department of Business Studies The Hong Kong Polytechnic University Hong KongDepartment of Applied Mathematics The Hong Kong Polytechnic University Hong Kong

we discuss the relationship between the marginal tail risk probability and the innovation'stail risk probability for some stationary financial time series *** first give the main results on the tail behavior of a class of infinite weighted sums of random variableswith heavy-tailed probabilities. And then, the main results are applied tothree important types of time series models:infinite order moving averages, the simple bilinear time series and the solutions of stochasticdifference equations. The explicit formulas are given to describe how the marginaltail probabilities come from the innovation's tail probabilities for these time *** results can be applied to the tail estimation of time series and are useful for risk analysis in finance.

关键词： risk analysis, infinite weighted sum, moving average, bilinear model, stochastic difference equation, tail probability, vague convergence.

Iterative Semi-Supervised Learning Using Softmax Probability

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Computers, Materials & Continua 2022年第9期72卷 5607-5628页

作者： Heewon chung Jinseok Lee Department of Biomedical Engineering College of Electronics and InformationKyung Hee UniversityYongin-siGyeonggi-do17104Korea

For the classification problem in practice,one of the challenging issues is to obtain enough labeled data for ***,even if such labeled data has been sufficiently accumulated,most datasets often exhibit long-tailed distribution with heavy class imbalance,which results in a biased model towards a majority *** alleviate such class imbalance,semisupervised learning methods using additional unlabeled data have been ***,as a matter of course,the accuracy is much lower than that from supervised *** this study,under the assumption that additional unlabeled data is available,we propose the iterative semi-supervised learning algorithms,which iteratively correct the labeling of the extra unlabeled data based on softmax *** results show that the proposed algorithms provide the accuracy as high as that from the supervised *** validate the proposed algorithms,we tested on the two scenarios:with the balanced unlabeled dataset and with the imbalanced unlabeled *** both scenarios,our proposed semi-supervised learning algorithms provided higher accuracy than previous *** is available at https://***/Heewonchung92/iterative-semi-learning.

关键词： Semi-supervised learning class imbalance iterative learning unlabeled data

Characterisation of dissolved organic matter in stormwater using high-performance size exclusion chromatography

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Journal of Environmental Sciences 2016年第4期28卷 236-245页

作者： Huiping Huang Christopher w.k.Chow Bo Jin School of Chemical Engineering The University of Adelaide School of Earth and Environmental Sciences The University of Adelaide Australian water Quality Centre SA Water Corporation

Understanding the complexity of dissolved organic matter（DOM）in stormwater has drawn a lot of interest,since DOM from stormwater causes not only environmental impacts,but also worsens downstream aquatic quality associated with water supply and *** study introduced and employed high-performance size exclusion chromatography（HPSEC）coupled with an ultraviolet–visible（UV–vis）diode array detector to assess changes in stormwater-associated DOM *** DOM was also analysed in relation to storm event characteristics,water quality and spectroscopic *** tools were used to determine the correlations within DOM and water quality *** showed that dissolved organic carbon（DOC）and UV absorbance at 254 nm（UV（254））as conventional DOM parameters were found to be correlated well to the changes in stormwater quality during each of the three storm events *** detector wavelengths（210and 254 nm）and their ratio（A（210）/A（254））were found to provide additional information on the physiochemical properties of stormwater-associated *** study indicated that A（210）/A（254） is an important parameter which could be used to estimate the DOM proportions of functional groups and conjugated carbon *** study provided also an understanding of stormwater quality constituents through assessing variability and sensitivity for various parameters,and the additional information of rainfall characteristics on runoff quality data for a better understanding of parameter correlations and influences.

关键词： Stormwater Dissolved organic matter HPSEC

An algorithm that minimizes audio fingerprints using the difference of Gaussians

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第10期12卷 836-845页

作者： MyoungBeom chung IlJu kO Department of Media Soongsil University

Recently,many audio search sites headed by Google have used audio fingerprinting technology to search for the same audio and protect the music copyright using one part of the audio ***,if there are fingerprints per audio file,then the amount of query data for the audio search *** this paper,we propose a novel method that can reduce the number of fingerprints while providing a level of performance similar to that of existing *** proposed method uses the difference of Gaussians which is often used in feature extraction during image signal *** the experiment,we use the proposed method and dynamic time warping and undertake an experimental search for the same audio with a success rate of 90%.The proposed method,therefore,can be used for an effective audio search.

关键词： Audio retrieval Audio fingerprint Audio signal processing Difference of Gaussians (DOG)

System Dynamic Modelling of Patient Flow and Transferral Problem in a Mixed Public-Private Healthcare System:A Case Study of Hong kong SAR

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Journal of Systems Science and Systems Engineering 2020年第5期29卷 590-608页

作者： C.k.M.LEE w.C.TAI kam k.H.NG Department of Industrial and Systems Engineering The Hon g Kong Polytechnic UniversityHung HornHong Kong SARChina School of Mechanical and Aerospace Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

The current healthcare system in Hong kong is experiencing pressure due to constrained resources,with dramatic increases in inpatient services queue lengths,dissatisfaction with the working environment,unacceptable workforce arrangements and high turnover rate of hospital *** maintain the robustness of the healthcare system and a sustainable inpatients flow,the Food and Health Bureau launched a public-private partnership programme to utilise the resources of the public and private *** research investigates the potential for extension of the programme and further enhancing the sustainability of the long-term inpatient services under a mixed public-private healthcare policy via system dynamic *** findings show that an increase of human resources in public hospitals does not substantially improve inpatient flow rate ***,the results from the system dynamic approach provide insights into the expansion of the service areas of the programme and suggest increasing the number of referrals to private hospitals.

关键词： System dynamic models scenario analysis inpatient transferral mixed public-private healthcare system

Hydrolyzed Al(Ⅲ) clusters:Speciation stability of nano-Al_(13)

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Journal of Environmental Sciences 2011年第5期23卷 705-710页

作者： Shuifeng wang Chihpin Huang Christopher w k. Chow Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. E-mail: wgds@*** Institute of Environmental Engineering National Chiao Tung University Hsinchu Taiwan China Australian water Quality Centre SA Water Corporation 250 Victoria Square Adelaide SA 5000 South Australia

Pure nano-All3 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR, photo correlation spectroscopy （PCS）, and Ferron assay. Results showed that concentration and temperature exhibited different roles on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS. Al13 solutions at high concentrations （0.5-2.11 tool/L） were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the eTA1-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations, All3 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90~C.

关键词： nano-All3 clusters inorganic polymer flocculant speciation stability