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核技术 2000年第2期23卷 86-89页

作者：方绚莱吴东岷李世民夏元复 Widatallahhm 南京大学南京210093 苏丹喀土穆大学

用穆斯堡尔谱学方法研究了在向列相不同温度下ＥＢＢＡ液晶中ＦｅＳ２悬浮粒子的布朗运动，并通过等效粒子模型给出了向列相液晶中粒子扩散过程的半定量解释。

关键词：穆斯堡尔谱学布朗运动向列相液晶

REmOVE INCLUSIONS FROm ALUmINUm mELT INELECTROmAGNETIC FIELD

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Acta metallurgica Sinica(English Letters) 2000年第5期13卷 1068-1074页

作者： T.X.Li Z.m.Xu B.D.Sun D.Shu Y.h.Zhou School of materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200030China

Electromagnetic separation of non-metallic inclusions from Al-Si melt is studied by theoretical analysis and experiments on self-designed electromagnetic separation apparatus. metallographs and LECO Image Analysis System were used to analyze the content of alumina in aluminum alloy before and after electromagnetic separation. It is seen that removal effciency increases with the increase of electromagnetic force (EmF) and diameter of inclusion particles while decreases with the increase of melt velocity and height of separator. All alumina particles with diamete of 14μm.h.ve been removed successfully from the melt.

关键词： aluminum melt alumina particle electromagnetic separation removal efficiency

Electronic structure, Dirac points and Fermi arc surface states in three-dimensional Dirac semimetal Na_3Bi from angle-resolved photoemission spectroscopy

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Chinese Physics B 2016年第7期25卷 76-88页

作者：梁爱基陈朝宇王志俊石友国冯娅伊合绵谢卓晋何少龙何俊峰彭莹莹刘艳刘德发胡成赵林刘国东董晓莉张君 m Nakatake h Iwasawa K Shimad m Arita h Namatame m Taniguchi 许祖彦陈创天翁红明戴希方忠周兴江 Beijing National Laboratory for Condensed matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China hiroshima Synchrotron Radiation Center Hiroshima University 2-313 Kagamiyama Higashi-Hiroshima City 739-0046 Japan Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China Collaborative Innovation Center of Quantum matter Beijing China

The three-dimensional（3D） Dirac semimetals have linearly dispersive 3D Dirac nodes where the conduction band and valence band are connected. They have isolated 3D Dirac nodes in the whole Brillouin zone and can be viewed as a 3D counterpart of graphene. Recent theoretical calculations and experimental results indicate that the 3D Dirac semimetal state can be realized in a simple stoichiometric compound A3Bi（A = Na, K, Rb）. here we report comprehensive high-resolution angle-resolved photoemission（ARPES） measurements on the two cleaved surfaces,（001） and（100）, of Na3Bi. On the（001） surface, by comparison with theoretical calculations, we provide a proper assignment of the observed bands, and in particular, pinpoint the band that is responsible for the formation of the three-dimensional Dirac cones. We observe clear evidence of 3D Dirac cones in the three-dimensional momentum space by directly measuring on the kx–ky plane and by varying the photon energy to get access to different out-of-plane kzs. In addition, we reveal new features around the Brillouin zone corners that may be related with surface reconstruction. On the（100） surface, our ARPES measurements over a large momentum space raise an issue on the selection of the basic Brillouin zone in the（100） plane. We directly observe two isolated 3D Dirac nodes on the（100） surface. We observe the signature of the Fermi-arc surface states connecting the two 3D Dirac nodes that extend to a binding energy of ~150 me V before merging into the bulk band. Our observations constitute strong evidence on the existence of the Dirac semimetal state in Na3Bi that are consistent with previous theoretical and experimental work. In addition, our results provide new information to clarify on the nature of the band that forms the3 D Dirac cones, on the possible formation of surface reconstruction of the（001） surface, and on the issue of basic Brillouin zone selection for the（100） surface.

关键词： Dirac semimetal Na3Bi photonemission surface state

氧摄取分数（OEF）评估子癎前期病人深部灰质氧代谢

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国际医学放射学杂志 2022年第6期45卷 740-741页

作者： L.F.Yang J.Cho T.Chen K.m.Gillen J.Li Q.h.Zhang 刘学焕

摘要目的通过比较子前期（PE）病人、妊娠健康对照者（PhC）和非妊娠健康对照者（NPhC）深部灰质（Gm）的氧摄取分数（OEF）值，探讨三者间 Gm 氧代谢的差异。方法纳

关键词：

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简化乳腺mRI筛查乳腺癌：3年结果分析

国际医学放射学杂志 2021年第3期44卷 356-357页

作者： m.Kwon J.S.Choi h.Won E.Y.Ko E.S.Ko K.W.Park 范璐

摘要关于连续几年简化筛查乳腺mRI的表现及其漏诊和检出的乳腺癌的特征性资料有限。目的评估简化筛查mRI的纵向诊断效能,并确定简化mRI的筛查结果是否在

关键词：

Feature identification in complex fluid flows by convolutional neural networks

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Theoretical & Applied mechanics Letters 2023年第6期13卷 447-454页

作者： Shizheng Wen michael W.Lee Kai m.Kruger Bastos Ian K.Eldridge-Allegra Earl h.Dowell Department of mathematics ETH ZurichZürich 8092Switzerland NASA Langley Research Center HamptonVA 23666USA Rivian San FranciscoCA 94080USA Department of mechanical Engineering and materials Science Duke UniversityDurhamNC 27708USA

Recent advancements have established machine learning's utility in predicting nonlinear fluid dynamics,with predictive accuracy being a central motivation for employing neural ***,the pattern recognition central to the networks function is equally valuable for enhancing our dynamical insight into the complex fluid *** this paper,a single-layer convolutional neural network(CNN)was trained to recognize three qualitatively different subsonic buffet flows(periodic,quasi-periodic and chaotic)over a high-incidence airfoil,and a near-perfect accuracy was obtained with only a small training *** convolutional kernels and corresponding feature maps,developed by the model with no temporal information provided,identified large-scale coherent structures in agreement with those known to be associated with buffet *** to hyperparameters including network architecture and convolutional kernel size was also *** coherent structures identified by these models enhance our dynamical understanding of subsonic buffet over high-incidence airfoils over a wide range of Reynolds numbers.

关键词： Subsonic buffet flows Feature identification Convolutional neural network Long-short term memory

双期CT、经食管超声对二尖瓣狭窄及房颤所致左心房血栓的检出及手术所见

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国际医学放射学杂志 2014年第1期 83-84页

作者： B.h.Choi S.m.Ko h.K.hwang m.G.Song J.K.Shin W.S.Kang 王巍巍 Department of Radiology Research Institute of Medical ScienceKonkuk University Medical Center Konkuk University School of medicine 1200-1 Neungdong-ro (Hwayang-dong) Gwangjin-guSeoul 143-729 South Korea

目的本项回顾性研究的目的是与术中所见对照,评价CT和经食管超声(TEE)检出二尖瓣狭窄(mS)和房颤(AF)病人左心房血栓的准确性。方法106例病人术前行CT

关键词：房颤二尖瓣狭窄左心耳血栓经食管心脏超声 CT

Vanadium pentoxide film for microsecond pulse generation in 1.5-μm region

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Optoelectronics Letters 2022年第1期18卷 29-34页

作者： m.h.mad F.Baharom Salam m.Azooz Ahmad h.A.Rosol m.h.Yasin Sulaiman Wadi harun Department of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia Department of Communication Engineering Engineering Technical CollegeAl-Furat Al-Awsat Technical UniversityNajafIraq Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabaya 60115Indonesia

Q-switched erbium doped fiber laser(EDFL)was passively realized using vanadium pentoxide(V_(2)O_(5))embedded into polyethylene glycol(PEG)film as saturable absorber(SA).The laser could successfully generate stable self-starting pulses when the V_(2)O_(5)film was placed in an EDFL *** operated at 1562.4 nm *** repetition rate can be varied from 91.7 khz to 128.2 khz while the pulse width shrank from 10.90μs to 7.81μs with rising pump power from 110.9 mW to 166.5 *** pulse energy recorded was 3.2 nJ at pump power of 166.5 *** results indicate that the saturable absorption of V_(2)O_(5)has promising nonlinear photonic applications especially in fiber laser development for 1.5-μm region.

关键词： pulse pump fiber

家族性高胆固醇血症大家系在两个世纪中的死亡率:家系死亡率研究

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英国医学杂志中文版 2002年第3期5卷 129-132页

作者： Eric J G Sijbrands Rudi G J Westendorp Joep C Defesche Paul h E m demeier Augustinus h m Smelt John J P Kastelein 马志毅 Department of Vascular medicine and General Internal medicine Clinical Epidemiology Leiden University MedicalCentre Department of General Internal University medicalCentre

目的 :评估未经治疗的无冠状动脉疾病的家族性高胆固醇血症所有原因的死亡率。设计 :家系死亡率研究。背景 :荷兰的一个大家系 ,其宗亲源自 19世纪一对夫妇。先证者 :家族中所有超过 2 0岁且有 5 0 %可能性携带家族性高胆固醇血症突变... 详细信息

目的 :评估未经治疗的无冠状动脉疾病的家族性高胆固醇血症所有原因的死亡率。设计 :家系死亡率研究。背景 :荷兰的一个大家系 ,其宗亲源自 19世纪一对夫妇。先证者 :家族中所有超过 2 0岁且有 5 0 %可能性携带家族性高胆固醇血症突变基因者。主要结果测定指标 :各种原因的死亡率。结果 :分析自 6 95 0人年的 2 5 0人中共死亡的70人。突变基因携带者的死亡率在 19世纪和 2 0世纪早期并未升高 ,1915年后开始升高 ,1935～196 4年达到高峰 (标准化死亡率比 1 78,95 %可信区间 1 13～ 2 76 ,P =0 0 0 3) ,以后下降。家系的两大分支间死亡率有显著性差异 (相对危险性3 2 6 ,95 %可信区间 1 74～ 6 11;P =0 0 0 1)。结论 :家族性高胆固醇血症患者间的死亡危险性差异显著。这种时间上及家系的不同分支间的巨大差异表明环境因素与基因有强大的相互作用。有必要进一步研究以识别那些极高危并需早期和强力预防措施的家族性高胆固醇血症患者。

关键词：家族性高胆固醇血症死亡率家系死亡率研究

Prevalences of oligozoospermia and azoospermia in male partners of infertile couples from different parts of India

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Asian Journal of Andrology 2006年第1期8卷 89-93页

作者： Rajvi h.m.h.a Sanjay makwana Geetha m. Ranga R.J.Srinivasan S.S.Virk hope Infertility Clinic and Research Foundation Bangalore 560042India Vasundhara hospital and Fertility Research Centre Jodhpur 342003India Karthekeya medical Research and Diagnostic Centre Kalina Mumbai 400098India Dr Tilak's Laboratory Kurnool Andhra Pradesh 518001India Virk hospital Jalandhar 144003India

Aim： To determine whether there was any regional variation in the prevalence of azoospermia, oligozoospermia and mean sperm counts in male partners of infertile couples from different parts of India. methods： Data on 16 714 semen samples analyzed over the past five years from six different laboratories located in five cities of India were collated and evaluated. Results： There was a regional variation in the prevalence of azoospermia. The prevalence of azoospermia was extremely high in Kurnool and Jodhpur （38.3% and 37.4%, respectively）. There was also a regional variation in the prevalence of oligozoospermia （51%） in Kurnool. There was no significant difference in the mean sperm counts in normospermic men. Conclusion： There is a regional variation in the prevalence of azoospermia and oligozoospermia in the male partners of infertile couples from different regions of India. The prevalence of azoospermia in Kumool and Jodhpur is higher than any other worldwide reported literature, Further studies need to be carded out to determine the cause of this. （Asian J Androl 2006 Jan; 8： 89-93）

关键词： oligospermia male infertility prevalence studies