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Fenestrated Basilar Artery Associated with Multiple Aneurysms

Journal of Huazhong University of Science and technology(Medical Sciences) 2003年第4期23卷 418-419,426页

作者：李文彬李明华 H.Grady Daniel Dee H.Wu timothy L.tytle Rifat Karatas Yasemin Karatas william t.c.yuh Department of Radiology the Affiliated Sixth People's Hospital Shanghai Jiaotong University Shanghai 200233 Department of Radiology University of Oklahoma Health Sciences Center Oklahoma City OK 73104 USA

A 59-year-old male presented with a history of feeling somewhat \"funny\" and having an episode of slurred speech. No neurological deficits were found. Multislice ct and ctA demonstrated multiple aneurysms associated with fenestrated basilar artery. ct was done with and without contrast infusion. Multiple detector high-resolution scans (GE, LightSpeed Plus, USA) of the brain were done at 1. 25 mm scan intervals. After 20 s delay, 150 cc of Isovue 370 was injected at power injection rate of 3. 0 cc/s. ctA using maximum intensity projection (MIP) and volume rendering (VR) reconstructions at 0. 25 mm slice intervals was created on GE Advantage~(tM) Windows Workstation 4. 0. On ctA study, MIP and VR reconstructions were considered satisfactory, aneurysms were clearly detected by both MIP and VR reconstructions, and VR was superior in the depiction of small arterial anatomy in this case. three aneurysms were visualized. this demonstrated a larger aneurysm measuring 5. 6 X 18. 6 mm located at the right internal carotid artery (fig. 1), and a small aneurysm measuring 3. 7 X 2. 0 mm at the origin of the left superior cerebellar artery (fig. 2). Another small aneurysm was seen originating from the distal end of the vertebral artery and the proximal portion of segment duplication of the basilar artery (fig. 2). this aneurysm was 3. 4X3. 0 mm in size, projecting axially with respect to the segment duplication of the basilar arteries, and dorsally toward the brain stem. the length of segment duplication of the basilar arteries was 11 mm. two channels of the vertebral arteries were unequal in diameter. the right segment duplication was 2. 6 mm in diameter, the left was 1. 4 mm. the angle of the segment duplication was 49°. Digital subtraction angiography (DSA) was done and compared to ct and ctA of those aneurysms. three aneurysms were visualized, and they appeared as described on ctA. But the aneurysm arising from the proximal end of the fenestrated basilar artery was not clear

关键词： fenestrated basilar artery multiple aneurysm

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MRI的ROI体积测量法和直径体积测量法对宫颈癌放疗效果的临床实用性评价

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实用放射学杂志 2004年第7期20卷 629-632页

作者：李文彬,李明华,崔雪娥,william t.c.yuh,Nina A.Mayr 上海交通大学附属第六人民医院放射科上海交通大学附属第六人民医院放射科上海交通大学附属第六人民医院放射科 Department of Radiology University of Oklahoma Health Sciences center Oklahomacity OK73104 USA Radiation Oncology center Department of Radiology University of Oklahoma Health Sciences center Oklahomacity OK73104USA 上海200233 上海200233 上海200233

目的　评价ROI体积测量法和直径体积测量法对宫颈癌放疗效果的临床实用性。方法　 60例宫颈癌患者给予 3次放疗和 4次MRI检查。①第 1次放疗前MRI检查。②间隔第 1次放疗 2～ 2 .5周进行第 2次放疗 (剂量 :2 0～ 2 5Gy)前进行第 2次MRI... 详细信息

目的　评价ROI体积测量法和直径体积测量法对宫颈癌放疗效果的临床实用性。方法　 60例宫颈癌患者给予 3次放疗和 4次MRI检查。①第 1次放疗前MRI检查。②间隔第 1次放疗 2～ 2 .5周进行第 2次放疗 (剂量 :2 0～ 2 5Gy)前进行第 2次MRI检查。③间隔第 1次放疗 4～ 5周进行第 3次放疗 (剂量 :45～ 5 0Gy)前进行第 3次MRI检查。④间隔第 3次放疗 1～ 2月患者随访时进行第 4次MRI检查。测量 4次MRI矢状面、横断面t2 WI上宫颈癌病灶大小 ,采用公式计算病灶体积。ROI体积测量法 :勾画矢状面t2 WI每个层面上病灶ROI范围 ,通过公式计算病灶体积。直径体积测量法 :测量MRI矢状面、横断面t2 WI上病灶的 3条最大径(d 1,d 2 ,d 3 ) ,采用公式计算病灶体积。 2种测量结果与肿瘤放疗的衰退率进行相关性研究。结果　ROI体积测量法和直径体积测量法在放疗前和放疗后具有显著的相关性 (r1 =0 .89;r4=0 .80 ) ,而在放疗期间相关性不明显 (r2 =0 .17,第 2次放疗前测量 ;r3 =0 .69,第 3次放疗前测量 )。与ROI体积测量法相比较 ,直径体积测量法上肿瘤体积较大 ,而衰退率呈“缓慢下降”趋势。结论　ROI体积测量法比直径体积测量法在放疗期间更能反映宫颈癌放疗的衰退率 ;在评估宫颈癌放疗效果方面 ,更具有临床实用性

关键词：宫颈癌磁共振成像肿瘤衰退率放射治疗

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杂志质量的保证需要审阅者的精心——兼谈颈清扫的命名问题

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国际耳鼻咽喉头颈外科杂志 2002年第2期26卷 129-127页

作者：屠规益中国医学科学院中国协和医科大学肿瘤医院北京100021

近读国外医学耳鼻咽喉科学分册2002年26卷1期两篇关于喉癌颈部淋巴结手术的文稿(007及008)，不得不说，这两篇文章，虽然提供了一些信息，但也给读者带来一些混淆的概念。一、关于文章007 1．21页第2纵项(右项)：“改良颈廓清，... 详细信息

近读国外医学耳鼻咽喉科学分册2002年26卷1期两篇关于喉癌颈部淋巴结手术的文稿(007及008)，不得不说，这两篇文章，虽然提供了一些信息，但也给读者带来一些混淆的概念。一、关于文章007 1．21页第2纵项(右项)：“改良颈廓清，尤其是Ⅲ型……保留胸锁乳突肌、颈内静脉、颈丛及颌下腺。”刚读到……

关键词：颈清扫术翻译淋巴结活检颈廓清术颈淋巴结命名问题

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MRI评价宫颈癌在放疗中形态和体积变化的临床意义

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中国临床医学影像杂志 2004年第7期15卷 391-395页

作者：李文彬李明华崔雪娥 william t.c.yuh Nina A.Mayr 上海交通大学附属第六人民医院放射科上海200233 美国俄克拉荷马大学健康科学中心放射科俄克拉荷马州俄克拉荷马市73104 美国俄克拉荷马大学健康科学中心肿瘤放疗中心俄克拉荷马州俄克拉荷马市73104

目的:探讨宫颈癌在放疗中形态和体积变化的MRI表现及其临床意义。材料和方法:60例宫颈癌患者给予与3次放疗和4次MRI检查。MRI检查时间点为:①第1次放疗前MRI检查。②第1次放疗后2～2.5周进行第2次放疗(剂量20～25Gy)前进行第2次MRI检查... 详细信息

目的:探讨宫颈癌在放疗中形态和体积变化的MRI表现及其临床意义。材料和方法:60例宫颈癌患者给予与3次放疗和4次MRI检查。MRI检查时间点为:①第1次放疗前MRI检查。②第1次放疗后2～2.5周进行第2次放疗(剂量20～25Gy)前进行第2次MRI检查。③第2次放疗后2～2.5周进行第3次放疗(剂量45～50Gy)前行第3次MRI检查。④第3次放疗后1～2月患者随访时进行第4次MRI检查。肿瘤形态分为规则形、分叶形和不规则形。肿瘤进行体积测量(分为ROI体积测量法和直径体积测量法)。ROI体积测量法:勾画MRI矢状面t2WI上肿瘤的ROI范围,利用公式计算肿瘤体积。直径体积测量法:测量MRI矢状面、横断面t2WI上肿瘤的3条最大径(d1,d2,d3),利用公式计算肿瘤体积。两种测量结果与肿瘤放疗后的衰退率进行相关性研究。结果:肿瘤的分叶形和不规则形数量在放疗中先增加后下降,两者形态在放疗前占总数68%,第1次放疗后占80%,第2次放疗后占72%,第3次放疗后占33%。ROI体积测量法和直径体积测量法在放疗前和第3次放疗后测量的肿瘤准确率具有显著相关性(分别为r1=0.87和r4=0.82),但两者在第1次放疗后和第2次放疗后测量的肿瘤准确率相关性差(分别为r2=0.17和r3=0.67)。与ROI体积测量法相比较,直径体积测量法上肿瘤体积较大,而衰退率呈“缓慢下降”

关键词：宫颈肿瘤磁共振成像

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Effects of layer interactions on instantaneous stability of finite Stokes flows

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Applied Mathematics and Mechanics(English Edition) 2024年第1期45卷 69-84页

作者： chen ZHAO Zhenli cHEN c.t.MUtASA Dong LI School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China

the stability analysis of a finite Stokes layer is of practical importance in flow control. In the present work, the instantaneous stability of a finite Stokes layer with layer interactions is studied via a linear stability analysis of the frozen phases of the base flow. the oscillations of two plates can have different velocity amplitudes, initial phases, and frequencies. the effects of the Stokes-layer interactions on the stability when two plates oscillate synchronously are analyzed. the growth rates of two most unstable modes when δ t equal, and δ = δ*/h*, where δ*and h*are the Stokes-layer thickness and the half height of the channel, respectively. However, their vorticities are different. the vorticity of the most unstable mode is symmetric, while the other is asymmetric. the Stokes-layer interactions have a destabilizing effect on the most unstable mode when δ tabilizing effect when δ > 0.68. However, the interactions always have a stabilizing effect on the other unstable mode. It is explained that one of the two unstable modes has much higher dissipation than the other one when the Stokes-layer interactions are strong. We also find that the stability of the Stokes layer is closely related to the inflectional points of the base-flow velocity profile. the effects of inconsistent velocity-amplitude, initial phase, and frequency of the oscillations on the stability are analyzed. the energy of the most unstable eigenvector is mainly distributed near the plate of higher velocity amplitude or higher oscillation frequency. the effects of the initial phase difference are complicated because the base-flow velocity is extremely sensitive to the initial phase.

关键词： finite Stokes layer instantaneous stability Stokes-layer interaction asynchronous oscillation

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Near resonance vibration isolation on a levered-dual response(LEDAR)coulomb-damped system by differential preloads/offsets in linear springs

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 1033-1050页

作者： t.I.tOLUWALOJU c.K.tHEIN D.HALIM Department of Mechanical Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100Zhejiang ProvinceChina Nottingham Ningbo china Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo 315048Zhejiang ProvinceChina

the levered-dual response(LEDAR)coulomb-damped system attains near resonant vibration isolation by differential preloads/offsets in linear *** takes the advantages of both the preloads/offsets in linear springs and the guiderail friction for realizing different levels of vibration *** isolation capacities are investigated on the strategies with both the horizontal and vertical guiderails,with the horizontal rail only,and without *** compressive preloads generally result in the consumption of most of the initial excitation energy so as to overcome the potential *** isolation onsets at the frequency ratio of 1∓0.095 on the left-hand side(LHS)and the right-hand side(RHS)of the lever are relative to the load plate *** observed near resonant isolation thus makes the LEDAR system a candidate for the isolation of the mechanical systems about resonance while opening a path for simultaneous harvesterisolation functions and passive functions at extreme frequencies.

关键词： lever ratio coulomb damping preload tension/compression isolation band/depth offset potential

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Efficient guiding and focusing of intense laser pulse using periodic thin slits

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Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu t.W.Huang K.Jiang c.N.Wu H.Peng P.c.hen R.Li H.B.Zhuo c.t.Zhou Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-plasma interactions as plasma optical components for generating high-harmonic light and controlling laser-driven particle ***,we propose and demonstrate that periodic thin slits can be regarded as a new breed of optical elements for efficient focusing and guiding of intense laser *** fundamental physics of intense laser interaction with thin slits is studied,and it is revealed that relativistic effects can lead to enhanced laser focusing far beyond the pure diffractive focusing *** addition,the interaction of an intense laser pulse with periodic thin slits makes it feasible to achieve multifold enhancement in both laser intensity and energy transfer efficiency compared with conventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applications.

关键词： laser pulse intense

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HI in High Gas-phase Metallicity Dwarf Galaxy WISEA J230615.06+143927.9

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Research in Astronomy and Astrophysics 2024年第1期24卷 292-299页

作者： Yan Guo c.Sengupta t.c.Scott P.Lagos Y.Luo Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China School of Astronomy and Space Sciences University of Science and Technology of ChinaHefei 230026China Institute of Astrophysics and Space Sciences(IA Porto) Rua das Estrelas4150-762PortoPortugal

We present resolved Giant Metrewave Radio telescope H I observations of the high gas-phase metallicity dwarf galaxy WISEA J230615.06+143927.9(z = 0.005)(hereafter J2306) and investigate whether it could be a tidal Dwarf Galaxy(tDG) candidate. tDGs are observed to have higher metallicities than normal dwarfs. J2306 has an unusual combination of a blue g-r color of 0.23 mag, irregular optical morphology and high-metallicity(12 +log(O/H) = 8.68 ± 0.14), making it an interesting galaxy to study in more detail. We find J2306 to be an H I rich galaxy with a large extended, unperturbed rotating H I disk. Using our H I data we estimated its dynamical mass and found the galaxy to be dark matter(DM) dominated within its H I radius. the quantity of DM, inferred from its dynamical mass, appears to rule out J2306 as an evolved tDG. A wide area environment search reveals J2306 to be isolated from any larger galaxies which could have been the source of its high gas metallicity. Additionally, the H I morphology and kinematics of the galaxy show no indication of a recent merger to explain the *** detailed optical spectroscopic observations of J2306 might provide an answer to how a seemingly ordinary irregular dwarf galaxy achieved such a high level of metal enrichment.

关键词： galaxies:abundances galaxies:dwarf galaxies:irregular radio lines:galaxies radio lines:ISM

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Radiative decays D*(s)→ D(s)γ in covariant confined quark model

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chinese Physics c 2024年第2期48卷 45-56页

作者： c.t.tran M.A.Ivanov P.Santorelli Q.c.Vo Department of Physics HCMC University of Technology and EducationVo Van Ngan 1700000 Ho Chi Minh CityVietnam Bogoliubov Laboratory of theoretical Physics Joint Institute for Nuclear Research141980 DubnaRussia Dipartimento di Fisica"E.Pancini" Universitàdi Napoli Federico ⅡComplesso Universitario di Monte S.AngeloVia CintiaEdificio 680126 NapoliItaly Istituto Nazionale di Fisica Nucleare Sezione di Napoli80126 NapoliItaly University of Science 700000 Ho Chi Minh CityVietnam

Radiative decays D((s))*→D((s))γare revisited in light of new experimental data from the BaBar and BESⅢ*** radiative couplings gD*Dγencoding nonperturbative QcD effects are calculated in the framework of the covariant confined quark model developed by *** compare our results with other theoretical studies and experimental *** couplings(in GeV-1)|g(D*+D+γ)|=0.45(9)and|g(D*0D0γ)|=1.72(34)calculated in our model agree with the corresponding experimental data|g(D*+D+γ)|=0.47(7)and|g(D*0D0γ)|=1.77(16).the most interesting case is the decay Ds*→Dsγ,for which a recent prediction based on light-cone sum rules at next-to-leading order|gDs*Dsγ|=0.60(19)deviates from the first(and only to date)lattice QcD result|gDs*Dsγ|=0.11(2)at nearly3σ.Our calculation yields|gDs*Dsγ|=0.29(6),which falls somehow between the two mentioned results,although it is larger than those predicted in other studies using quark models or QcD sum rules.

关键词： covariant quark model radiative decay charmed meson

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Decision and coordination of an E-commerce Supply chain considering Returns and Network Externalities

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Journal of Systems Science and Systems Engineering 2024年第5期33卷 552-575页

作者： Liang Shen Fei Lin Yuyan Wang Luping Ding t.c.E.cheng Dexia Wang School of Public Finance and taxation Shandong University of Finance and Economicsjinan 250014China bschool of Management Science and Engineering Shandong University of Finance and EconomicsJinan 250014China PolyU Business School The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

considering the large number of returns in online sales and the network externalities of e-platforms,we develop a decentralized model and a centralized model to explore the impacts of returns and network externalities on e-commerce supply chain(EcSc)*** show that in the decentralized model,the service level,price,market demand,and EcSc members’profits increase with the network externality ***,the service level and price increase,while the market demand and EcSc members’profits decrease with the product return *** centralized model is the optimal operating mode when it is properly *** design the“commission and return cost-sharing”contract to optimize EcSc,in which the proportion of the e-platform’s sharing of the return handling cost is exactly equal to the proportion of the system profit after *** on the decentralized model,we develop two extended models in which we endogenize the impacts of the service level and return rate on the network externality *** comparisons between the extended and decentralized models,we show that high-quality service can improve EcSc’s profitability,while a high return rate hurts its economic performance.

关键词： E-commerce supply chain coordination mechanism network externalities return products

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