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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

用于未来单模纤维集成光学系统的耦合方法:进度报告

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发光学报 1979年第Z2期 61-71页

作者： h p hsu ,w s C Chang ,刘洪举

这里提出了有关纤维到纤维、纤维到薄膜波早及薄膜波导之间的耦合方面研究进度的评论。一般说来,对于两个纤维之间的耦合,采用直接激励方法是合适的,其耦合效率大于90％。直接激励方法也适用于折射率相差很大的两个薄膜波导及薄膜波导... 详细信息

这里提出了有关纤维到纤维、纤维到薄膜波早及薄膜波导之间的耦合方面研究进度的评论。一般说来,对于两个纤维之间的耦合,采用直接激励方法是合适的,其耦合效率大于90％。直接激励方法也适用于折射率相差很大的两个薄膜波导及薄膜波导到纤维之间的耦合。耦合效率取决于波导中场分布的匹配情况。激光光源到纤维的耦合多半采用直接激励方法。消失扬的耦合方法适用于折射率分布相近的两个薄膜波导之间的耦合,其耦合效率大于70％。

关键词：薄膜波导折射率分布藕合器单模纤维消失场玻璃纤维人造无机纤维包层进度

“黑色”非晶形三价铁羟基氧化物及其对有害物质的吸附(英文)

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地球化学 2005年第1期34卷 41-50页

作者： M.Ding B.h.w.s.de Jong s.J.B.Niessen J.p.M.van der Meer V.J.van hinsberg Los Alamos National Laboratory Chemistry DivisionC-INCMS J514Los Al amosNM 87545USAInstitute of Earth SciencesUtrecht UniversityBudapestlaan 43584 CD Ut rechtthe NetherlandsPhysics DepartmentMaterials Center Nuclear Solid State PhysicsGroningen UniversityNijenborgh 49747 AG Groningenthe NetherlandsForschungszentrum Karlsruhe76344 Eggenstein-LeopoldshafenGermanyDepartment of Earth SciencesUniversity of BristolBS8 1RJUK.

利用硝酸铁与氨水之间的水解反应,生成了一种新的“黑色”非晶形三价铁羟基氧化物(FeOOh)该物质在室温下稳定,有较高的硬度,其比表面积约为300m2/g,零电荷点(pZC)在ph7～8之间根据Mssbauer谱的鉴定,它具有四方纤铁矿(β-FeOOh)的结构特... 详细信息

利用硝酸铁与氨水之间的水解反应,生成了一种新的“黑色”非晶形三价铁羟基氧化物(FeOOh)该物质在室温下稳定,有较高的硬度,其比表面积约为300m2/g,零电荷点(pZC)在ph7～8之间根据Mssbauer谱的鉴定,它具有四方纤铁矿(β-FeOOh)的结构特征FeOOh和它与各溶质的表面配合物的X射线光电光谱结果表明,FeOOh与pb、Zn和CrO2-4之间的反应是物理吸附,而与pO3-4和AsO3-4之间的反应是化学吸附3个阴离子及2个阳离子的吸附等温式结果表明,该三价铁羟基氧化物的吸附能力比常见的铁羟基氧化物强3倍磷酸盐与砷酸盐之间的竞争反应结果表明,磷酸盐与FeOOh的反应比砷酸盐强烈。

关键词： “黑色”非晶形三价铁羟基氧化物有害物质吸附 x射线光电光谱重金属环境吸附剂

Observation of an EpIR Effect in Nd_(1-x)sr_xMnO_3 Ceramics with secondary phases

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Journal of Materials science & Technology 2013年第8期29卷 737-741页

作者： s.s.Chen X.J.Luo D.w.shi h.Li C.p.Yang school of Mathematics and physics Hubei Polytechnic University Faculty of physics and Electronic Technology Hubei University

Nd1-xsrxMnO3 （x ： 0.3, 0.5） ceramics containing a secondary phase are synthesized by high-energy ball milling and post heat-treatment method. The 4-wire and 2-wire measuring modes are used to investigate the transport character of the grain/phase boundary （inner interface） and electrode-bulk interface （outer interface）, respectively, and the results indicate that there is a similar nonlinear I-V behaviour for both of the inner and outer interfaces, however, the electric pulse induced resistance change （EpIR） effect can only be observed at the outer interface.

关键词： Electric pulse induced resistance change (EpIR) space charge layer Nonlinearity Manganite high-energy ball milling

hYpOMAGNEsEMIA AND hEART COMpLICATIONs IN DIABETEs MELLITUs

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中华医学杂志(英文版) 1987年第9期100卷 722-722页

作者： w G Zhang h X Qiu s p wang Department of Internal Medicine First Affiliated Hospital of Chongqing Medical University Chongqing

In order to establish the relationship between hypomagnesemia and heart complications in diabetes mellitus, the magnesium levels of serum, erythrocytes, and urine in 109 diabetics and 130 normal controls were studied. It was found that serum and erythrocyte magnesium levels were significantly lower, and urine magnesium significantly higher in the diabetics than in the controls. serum magnesium in diabetics with heart complications (n=17) was significantly lower than that in diabetics without heart complications (n=92). The results obtained by multiple regression analysis suggested that hypomagnesemia, hypertension, and body mass index contribute to the occurrence of heart complications in diabetics. It was believed that hypomagnesemia may be one of the risk factors for heart complications in diabetes mellitus.

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基于DwI的腹膜转移功能性肿瘤负荷可预测晚期卵巢癌不完全肿瘤减灭

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国际医学放射学杂志 2020年第6期 751-752页

作者：刘晨 E.Y.p.Lee h.An J.A.U.perucho K.w.h.Chiu E.s.hui M.M.Y.Chu h.Y.s.Ngan Department of Diagnostic Radiology Queen Mary Hospital University of Hong Kong

摘要目的探讨基于DwI的腹膜转移(pC)量化评估在判断卵巢癌(OC)不完全肿瘤减灭中的预测价值。方法术前前瞻性纳入疑似Ⅲ-Ⅳ期或复发性OC病人行DwI检查。采

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Influence of Fe Addition on products of self-propagating high-Temperature synthesis Reaction in 3Ti-si-2C system

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稀有金属材料与工程 2009年第A03期38卷 113-118页

作者： Guan Q L wang h Y Li s L si w p Jiang Q C Key Laboratory of Automobile Materials of Ministry of Education Jilin University Changchun 130025 China

Influence of Fe addition on products of self-propagating high-temperature synthesis (shs) reaction in 3Ti-si-2C system was investigated in the present study. without Fe addition, Ti5si3 and TiC are the dominant phases along with a small amount of Ti3siC2 phase and unreacted C left in the final products. As Fe content ranges from 10% to 30%, the products consist of TiC, Ti5si3, Fe2Ti and unreacted C, but no trace of Ti3siC2 phase is detected. Furthermore, the amounts of both Fe2Ti and C phases increase with Fe content increasing. Addition of Fe has a great effect on the reaction route and significantly restrains the formation of Ti3siC2 during the combustion synthesis process, and therefore, the shs is not an effective fabrication technique to synthesize the ternary Ti3siC2 ceramic in either 3Ti-si-2C or Fe-3Ti-si-2C system. Besides, without Fe addition, Ti5si3 presents as the coarse irregular appearance with an obviously sintered morphology. In contrast, the shape of Ti5si3 exhibits more and more spherical (cobblestone-like) and the surface becomes increasingly smooth, because the amount of liquids formed during the shs reaction increases with the increase of Fe content. On the other hand, with Fe content increasing from 0 to 30 wt.%, the particulate size of TiC decreases from more than 5 μm to 1 μm or less, mainly due to the fact that the combustion temperature decreases with the increase of Fe content in the preforms.

关键词：复合材料铁含量燃烧过程物理性能

γ-氨基丁酸能抑制可锐化大棕蝠听皮层神经元频率调谐

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动物学报 2002年第3期48卷 346-352页

作者：陈其才 p.h.-s.JEN 吴飞健华中师范大学生物学系武汉430079 密苏里大学生物科学系

本实验使用了 9只成年健康的大棕蝠 (Eptesicusfuscus)。采用双声刺激和多管电极电泳导入荷包牡丹碱 (bicuculline,Bic)的方法 ,研究了γ 氨基丁酸 (γ aminobutyricacid ,GABA)能抑制在锐化听皮层 (primaryauditorycortex ,AC ,即初级... 详细信息

本实验使用了 9只成年健康的大棕蝠 (Eptesicusfuscus)。采用双声刺激和多管电极电泳导入荷包牡丹碱 (bicuculline,Bic)的方法 ,研究了γ 氨基丁酸 (γ aminobutyricacid ,GABA)能抑制在锐化听皮层 (primaryauditorycortex ,AC ,即初级听皮层 )神经元频率调谐中的作用。结果发现 :正常AC神经元的频率调谐曲线表现出单峰开放式、多峰开放式和单峰封闭式 3种类型 ;用双声刺激方法研究证实 ,至AC神经元的抑制性输入能被抑制性声刺激所激活 ,且这种神经抑制有自身的最佳频率 ,根据其对兴奋反应的影响程度和系统地改变抑制性声刺激的强度 ,可在兴奋性频率调谐曲线或兴奋区的高频边或 /和低频边测出抑制性频率调谐曲线或抑制区 ;当这种抑制性输入被抑制性声刺激激活后 ,能降低阈上 10dB声强引起的兴奋反应的发放率 ,抑制效率随抑制声刺激强度的增强而加强 ;电泳GABAa受体拮抗剂荷包牡丹碱Bic后 ,可不同程度地去GABA能抑制 ,扩宽频率调谐曲线 ,使多峰调谐曲线变成单峰 ,封闭型变成开放型。表明GABA能抑制参与构成至AC神经元的抑制性输入 ,在正常情况下这种抑制有助于提高中枢听神经元的信号 /噪声比和频率分析能力 ,并锐化频率调谐。因此本结果提示 ,声音的各参量中所包含的信息从外周传入中枢后。

关键词： γ-氨基丁酸大棕蝠听皮层神经元频率调谐 GABA能抑制 AC神经元

七氟烷或丙泊酚联合瑞芬太尼用于腹腔镜手术麻醉的比较

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复旦学报（医学版） 2007年第3期34卷 409-413页

作者：黄绍强田复波陈新刚复旦大学附属妇产科医院麻醉科上海200011

目的比较七氟烷、瑞芬太尼静吸复合麻醉与丙泊酚、瑞芬太尼靶控输注(TCI)全凭静脉麻醉,为临床合理应用提供参考。方法52例择期妇科腹腔镜手术病例,随机均分为s、p 2组。自诱导至术毕2组始终以5 ng／mL效应室TCI输注瑞芬太尼,s组在以丙... 详细信息

目的比较七氟烷、瑞芬太尼静吸复合麻醉与丙泊酚、瑞芬太尼靶控输注(TCI)全凭静脉麻醉,为临床合理应用提供参考。方法52例择期妇科腹腔镜手术病例,随机均分为s、p 2组。自诱导至术毕2组始终以5 ng／mL效应室TCI输注瑞芬太尼,s组在以丙泊酚、琥珀胆碱完成插管后改吸七氟烷,p组以TCI输注丙泊酚。术中维持听觉诱发电位指数(AAI)在15-25。观察各时点血流动力学参数、血糖变化,记录苏醒及拔管时间、拔管后镇静评分(OAAs)、术后认知功能评分(MMsE)以及术中高血压、低血压、心动过缓和术后不良反应发生情况。结果术中各时点AAI及血流动力学参数变化两组无明显差异,术毕前及拔管后10min两组血糖均有所升高,与基础值比差异有显著性(pp组明显长于s组(11．2 vs 7．0min)(ps评分还是MMsE评分两组间均无明显差异,术后认知功能均较术前有短暂下降,但术后2 h已基本恢复。术中、术后不良事件发生率以及术后24 h内VAs评分两组间差异均无显著性。结论七氟烷或丙泊酚联合瑞芬太尼用于妇科腹腔镜手术都能提供满意的麻醉,副反应相似,七氟烷比丙泊酚可控性更佳,术后苏醒更为迅速。

关键词：七氟烷瑞芬太尼丙泊酚靶控输注诱发电位,听觉