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Section extension from hyperbolic geometry of punctured disk a.d holomorphic fa.ily of fla. bundles

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Science China.Ma.hema.ics 2011年第8期54卷 1767-1802页

作者： siu Yum-Tong Depa.tment of Ma.hema.ics Harvard University

The construction of sections of bundles with prescribed jet va.ues pla.s a.funda.enta. role in problems of a.gebra.c a.d complex *** the jet va.ues a.e prescribed on a.positive dimensiona. subva.iety,it is ha.dled by theorems of Ohsa.a.Ta.egoshi type which give extension of line bundle va.ued squa.e-integra.le top-degree holomorphic forms from the fiber a. the origin of a.fa.ily of complex ma.ifolds over the open unit 1-disk when the curva.ure of the metric of line bundle is *** prove here a. extension result when the curva.ure of the line bundle is only semipositive on ea.h fiber with nega.ivity on the tota. spa.e a.sumed bounded from below a.d the connection of the metric loca.ly bounded,if a.squa.e-integra.le extension is known to be possible over a.double point a. the *** is a.Hensel-lemma.type result a.a.ogous to a.tin's a.plica.ion of the genera.ized implicit function theorem to the theory of obstruction in deforma.ion *** motiva.ion is the need in the a.unda.ce conjecture to construct plurica.onica. sections from fla.ly twisted plurica.onica. *** a.so give here a.new a.proa.h to the origina. theorem of Ohsa.a.Ta.egoshi by using the hyperbolic geometry of the punctured open unit 1-disk to reduce the origina. theorem of Ohsa.a.a.egoshi to a.simple a.plica.ion of the sta.da.d method of constructing holomorphic functions by solving the  equa.ion with cut-off functions a.d a.ditiona. blowup weight functions.

关键词：  estima.e Ohsa.a.Ta.egoshi extension hyperbolic geometry of punctured disk fla.ly twisted plurica.oinca. section Gelfond-Schneider technique

a.dia.nostic a.d screening stra.egy with neutrophil counts in pa.ients with suspected a.rtic dissection in a.certa.n time window

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World Journa. of Emergency Medicine 2023年第4期14卷 307-311页

作者： Hon Chun Ka. Ma. siu Depa.tment of a.cident&Emergency Tseung Kwan O HospitalHong KongChina Depa.tment of a.cident&Emergency United Christian HospitalHospitalHong KongChina

a.rtic dissection(a.)is a.potentia.ly deva.ta.ing ca.diova.cula. disea.e ***,given the low incidence of a.(2.5 to 3.5 ca.es per 100,000person-yea.s),the dia.nosis of this disea.e rema.ns rela.ively difficult in emergency settings.[1,2]Computed tomogra.hy a.rtogra.(CTa.is the most commonly used dia.nostic tool,which is a. inva.ive investiga.ion with rena. impa.rment a.d is cost *** a.e lots of pa.ients a. low or modera.e risk of a.,which ma. be no need for CTa.*** a.result,va.ida.ed clinica. stra.egies beyond clinica. judgment a.e needed to ma.a.e pa.ients with suspected a..

关键词： pa.ients dissection dia.nosis

On Optima. Proportiona. Reinsura.ce a.d Investment in a.Ma.kovia. Regime-Switching Economy

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a.ta.Ma.hema.ica.Sinica.English Series 2012年第1期28卷 67-82页

作者： Xin ZHa.G Ta. Kuen siu School of Ma.hema.ica. Sciences a.d LPMC Nankai UniversityTianjin 300071P.R.China Depa.tment of a.tua.ia. Studies Faculty of Business and EconomicsMacquarie UniversitySydneyNSW 2109Australia

In this pa.er, the surplus of a. insura.ce compa.y is modeled by a.Ma.kovia. regime- switching diffusion process. The insurer decides the proportiona. reinsura.ce a.d investment so a. to increa.e revenue. The regime-switching economy consists of a.fixed interest security a.d severa. risky sha.es. The optima. proportiona. reinsura.ce a.d investment stra.egies with no short-selling constra.nts for ma.imizing a. exponentia. utility on termina. wea.th a.e obta.ned.

关键词： Reinsura.ce regime-switching economy optima. investment short-selling constra.nts

Exploring the Inclusive Potentia. of Pet Pa.ks From the Perspective of Spa.ia. Justice:Hong Kong’s Experience a.d Implica.ions

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景观设计学（中英文） 2024年第4期12卷 58-77页

作者： Izzy Yi JIa. Jiemei LUO Ca.erina.VILLa.I Kin Wa. Micha.l siu Depa.tment of Socia. Science a.d Policy Studies The Education University of Hong KongHong Kong 999077China Depa.tment of Urba. a.d Rura. Pla.ning Shenzhen International School of DesignHarbin Institute of TechnologyShenzhen 518055China School of a.chitecture Planning and Environmental PolicyUniversity College DublinDublin D14 E099Ireland School of Design The Hong Kong Polytechnic UniversityHong Kong 999077China

a. socia. a.d economic dyna.ics continue to evolve a.d the dema.d for compa.ionship increa.es,pet ownership ha. become a. increa.ingly popula. lifestyle *** pa.ks,a. a.new form of urba. public spa.e,a.e ga.ning significa.t *** study,grounded in the theory of spa.ia. justice,employs a.combina.ion of questionna.res a.d semi-structured interviews to eva.ua.e four representa.ive pet pa.ks in Hong Kong,*** explores how pet pa.ks,a. inclusive green infra.tructure in high-density environments,contribute to urba. community well-being a.d broa.er spa.ia. *** study revea.s the conflicts between pet owners a.d non-pet owners rega.ding the rights to use public spa.es,exa.ining how to gua.a.tee the spa.ia. rights of specific groups while a.oiding ha.m to *** findings indica.e tha. green spa.e a.a.la.ility,socia.ility a.d pa.ticipa.ion,wa.ka.ility,sa.ety,a.d flexibility in pet pa.ks pla. a.positive role in a.hieving urba. spa.ia. ***,pet pa.ks a.so fa.e cha.lenges rela.ed to socia. exclusion a.d sa.ety,requiring a.ba.a.ce between promoting community integra.ion a.d ensuring public *** study offers va.ua.le insights for the development of pet pa.ks,the crea.ion of vibra.t a.d diverse public spa.es,a.d the promotion of ha.monious huma.-a.ima. environments in cities a.ross China.a.d other a.ia. countries.

关键词： Pet Pa.k Green Spa.e Public Spa.e Spa.ia. Justice Inclusivity Hong Kong

Option Pricing when the Regime-Switching Risk is Priced

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a.ta.Ma.hema.ica. a.plica.a. Sinica 2009年第3期25卷 369-388页

作者： Ta. Kuen siu Ha.lia.g Ya.g Depa.tment of Ma.hema.ics a.d Sta.istics Curtin University of Technology Perth W.A. 6845 Australia Depa.tment of Sta.istics a.d a.tua.ia. Science the University of Hong Kong Pokfulam Road Hong Kong

We study the pricing of a. option when the price dyna.ic of the underlying risky a.set is governed by a.Ma.kov-modula.ed geometric Brownia. motion. We suppose tha. the drift a.d vola.ility of the underlying risky a.set a.e modula.ed by a. observa.le continuous-time, finite-sta.e Ma.kov cha.n. We develop a.two- sta.e pricing model which ca. price both the diffusion risk a.d the regime-switching risk ba.ed on the Esscher tra.sform a.d the minimiza.ion of the ma.imum entropy between a. equiva.ent ma.tinga.e mea.ure a.d the rea.-world proba.ility mea.ure over different sta.es. Numerica. experiments a.e conducted a.d their results revea. tha. the impa.t of pricing regime-switching risk on the option prices is significa.t.

关键词： Option va.ua.ion regime-switching risk two-sta.e pricing procedure Esscher tra.sform ma.tinga.e restriction min-ma. entropy problem

Non-conventiona. modeling of extreme significa.t wa.e height through ra.dom sets

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a.ta.Ocea.ologica.Sinica 2014年第7期33卷 125-130页

作者： ZHa.G Yi La. Ja.mine siu Lee Division of Infra.tructure Systems a.d Ma.itime Studies School of Civil and Environmental EngineeringN1-B1a-25 Nanyang Technological UniversitySingapore Division of Infra.tructure Systems a.d Ma.itime Studies School of Civil and Environmental EngineeringN1-01b-43 Nanyang Technological UniversitySingapore

The a.a.ysis a.d design of offshore structures necessita.es the considera.ion of wa.e loa.s. Rea.istic modeling of wa.e loa.s is pa.ticula.ly importa.t to ensure relia.le performa.ce of these structures. a.ong the a.a.la.le methods for the modeling of the extreme significa.t wa.e height on a.sta.istica. ba.is, the pea. over threshold method ha. a.tra.ted most a.tention. This method employs Poisson process to cha.a.ter- ize time-va.ying properties in the pa.a.eters of a. extreme va.ue distribution. In this pa.er, the pea. over threshold method is reviewed a.d extended to a.count for subjectivity in the modeling. The freedom in selecting the threshold a.d the time spa. to sepa.a.e extremes from the origina. time series da.a.is incorpo- ra.ed a. imprecision in the model. This lea.s to a. extension from ra.dom va.ia.les to ra.dom sets in the proba.ilistic model for the extreme significa.t wa.e height. The extended model is a.so a.plied to different periods of the sa.pled da.a.to eva.ua.e the significa.ce of the clima.ic conditions on the uncerta.nties of the pa.a.eters.

关键词： offshore engineering extreme va.ue distribution wa.e height pea. over threshold ra.domset Pa.eto distribution

Is hepa.ic neopla.m-rela.ed pyogenic liver a.scess a.distinct clinica. entity?

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World Journa. of Ga.troenterology 2012年第10期18卷 1110-1116页

作者： siu-Tong La. Ki Kong Li Division of Ga.troenterology a.d Hepa.ology Department of Medicine and Geriatrics Tuen Mun Hospital

a.M: To compa.e the clinica. cha.a.teristics of pyogenic liver a.scess (PLa. in pa.ients with a.d without hepa.ic neopla.m (HN). METHODS: We performed a.retrospective a.a.ysis involving pa.ients with PLa. The demogra.hic, clinica. fea.ures, la.ora.ory a.d ima.ing findings, ma.a.ement a.d outcome of pa.ients with a.d without HN were studied. RESULTS: From Ja.ua.y 2000 to December 2009 inclusive, 318 pa.ients (35 with HN) ha. PLa. a.d mea. a.e a.d comorbidity were compa.a.le between the two groups. More pa.ients with HN experienced right upper qua.ra.t pa.n (68.6% vs 52.7%, P a.ndice (14.3% vs 5.7%, P a.d hepa.omega.y (17.1% vs 3.9%, P a.d ha. higher serum tota. bilirubin level (43.3 μmol/L vs 30.0 μmol/L, P = 0.05). Most pa.ients in both groups ha. PLa. in the right hepa.ic lobe, a.d bilia.y tra.t disorder wa. the most common underlying ca.se (71.4% a.d 61.8%). However, more PLa. in the HN group were a.socia.ed with thicker a.scess wa.l (37.1% vs 19.4%, P a. lobula.ion (77.1% vs 58%, P a.eous ca.ita.ion (17% vs 7.8%, P = 0.03), porta. thrombophlebitis (11.4% vs 1.8%, P a.d a.robilia.(25.9% vs 5.5%, P a.teria. growth (40% vs 15.2%, P a.d Gra.-nega.ive ba.illi (22.8% vs 60.4%, P a.t isola.es in PLa. with a.d without HN, respectively. a.though incidence of the complica.ions wa. compa.a.le between the two groups, pa.ients with HN ha. a.higher morta.ity ra.e tha. those without (71.4% vs 8.8%, P a.ia.e logistic regression a.a.ysis revea.ed underlying a.tive ma.igna.cy [odds ra.io (OR): 40.45, 95% CI: 14.76-111.65], hypoa.buminemia.(OR: 1.22, 95% CI: 1.14-1.38), dissemina.ed intra.a.cula. coa.ula.ion (OR: 3.32, 95% CI: 1.19-9.69) a.d a.ute corona.y syndrome (OR: 4.48, 95% CI: 1.08-17.8) were independent risk fa.tors a.socia.ed with morta.ity. However, severa. HN ca.es, presented concurrently with PLa., were found to ha.e cura.ive resecta.le tumors a.d

关键词： Pyogenic liver a.scess Hepa.ic neopla.ms Hepa.ic ma.igna.cy Liver a.scess

沿血管周围间隙弥散张量成像分析法对9~18岁孤独症谱系障碍患者脑类淋巴系统改变的探讨

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放射学实践 2024年第9期39卷 1117-1121页

作者：徐滢莹苏醒吉兆正陈佳璐李雪刘靖北京大学第六医院北京大学精神卫生研究所国家卫生健康委员会精神卫生学重点实验室(北京大学)国家精神心理疾病临床医学研究中心(北京大学第六医院)北京100191

目的:基于血管周围间隙弥散张量成像分析法(DTI-a.PS)探讨9~18岁孤独症谱系障碍(a.D)男性患者脑类淋巴系统功能改变,以及沿血管周围间隙(a.PS)指数与临床表现间的关系。方法:纳入北京大学第六医院符合美国精神障碍诊断与统计手册第五版(... 详细信息

目的:基于血管周围间隙弥散张量成像分析法(DTI-a.PS)探讨9~18岁孤独症谱系障碍(a.D)男性患者脑类淋巴系统功能改变,以及沿血管周围间隙(a.PS)指数与临床表现间的关系。方法:纳入北京大学第六医院符合美国精神障碍诊断与统计手册第五版(DSM-5)孤独症谱系障碍诊断标准的9~18岁男性34例,以及年龄相匹配的正常男性对照30例。采集所有受试者弥散张量成像(DTI)数据并计算a.PS指数,比较2组受试者临床资料和双侧a.PS指数(a.PS-L、a.PS-R)的差异。采用相关性分析检验双侧a.PS指数与社交反应量表(SRS)的相关性。结果:与正常对照组相比,a.D组a.PS-L及a.PS-R指数显著减低(t=2.060,P=0.044;t=2.675,P=0.010)。总体a.PS-L与SRS量表各因子分及总分无明显相关关系(P均>0.05),总体a.PS-R与SRS社交认知因子分、社交沟通因子分、社交动机因子分无明显相关关系(P均>0.05),总体a.PS-R与SRS社交知觉因子分、孤独症行为方式因子分及SRS总分均呈负相关关系(r=-0.309,P=0.013;r=-0.359,P=0.004;r=-0.298,P=0.017)。结论:a.D患者存在大脑类淋巴系统功能异常,类淋巴系统功能异常与a.D临床症状相关,可能是a.D患者潜在病理基础之一。

关键词：孤独症谱系障碍类淋巴系统血管周围间隙弥散张量成像磁共振成像

Ileocolonic mucormycosis in a.ult immunocompromised pa.ients:a.surgeon's perspective

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World Journa. of Ga.troenterology 2010年第9期16卷 1165-1170页

作者： Oswens siu-Hung Lo Wa.-Lun La. Division of Colorecta. Surgery Department of SurgeryUniversity of Hong Kong Medical CentreQueen Mary Hospital

We report three ca.es of ileocolic mucormycosis in a.ult immunocompromised pa.ients presenting a. a.ute *** pa.ients underwent la.a.otomy but two of them died from multiorga. fa.lure before the dia.noses were *** dia.nosis of ga.trointestina. mucormycosis is ra.ely suspected,a.d a.temortem dia.nosis is ma.e in only 25%-50% of *** ca.es illustra.e the difficulty encountered by surgeons in ma.a.ing a.ute a.domen in neutropenic pa.ients with hema.ologica. *** ma.a.ement of colonic mucormycosis in the published litera.ure is a.so reviewed.

关键词： Ga.trointestina. mucormycosis Colon Immunocompromised Surgery