排序方式: 共有47条查询结果,搜索用时 15 毫秒
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新型芯片毛细管电泳电化学检测系统及其在神经递质分离检测中的应用 总被引:7,自引:0,他引:7
自 20世纪90年代初Manz等Dj提出“微型全化学分析系统”(Miniaturized Total Chemical Analysi 相似文献
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Diffraction Properties for 1000 Line/mm Free-Standing Quantum-Dot-Array Diffraction Grating Fabricated by Focused Ion Beam 下载免费PDF全文
In the research of inertial confinement fusion (ICF), diagnosis of soft x-ray spectra radiated from pellet implosion is a crucial approach to compre- hend the space-time characteristic of plasma and the laser-plasma interactions. Conventional black- white transmission grating (TG) as a speetrophotom- etry element has been widely used in the region of op- tical measurements. However, the inherent high-order diffraction of black-white TG can overlap the informa- tion from the first order diffraction. The uncertainty of unfolding the complex process is the main diffi- culty in precise spectral analysis, which greatly hin- ders being able to stripe out the reasonably physical information. Quantum-dot-array diffraction grat- ing (QDADG) proposed by Cao, where the trans- mittance distribution obeys the sine form exactly, is an ideal amplitude TG and has perfect properties of pro- ducing just one pair of conjugate first order diffraction lines and suppressing the high order diffraction.The traditional fabrication technique for QDADG is the electron beam lithography (EBL) and the x-ray lithog- raphy (XRL). Owing to its capability of gen- erating patterns and the high resolution, EBL plays an increasingly important role in the micromachining, and is recognized as the main approach of fabricating a mask. The fabrication of nanoscale patterns with steep cross section is the superiority of XRL, which possesses the advantages of high efficiency, nanoscale resolution and great penetration capability. On the basis of the above-mentioned processing technique, 1000 line/mm quasi-sinusoidal single-order diffraction TG with the minimal feature structure of 500 nm was reported by Kuang et al., and can be applied in the ICF research. For single order diffraction grating, unfortunately, the promotion and application of EBL and XRL are restricted by the complex process, long period, difficult manufacture and the existence of the supporting film that absorbs x-rays and distorts the light information. 相似文献
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用全矢量的三维有限差分时域(finite-difference time-domain,简称FDTD)方法,研究了正方形单元结构金属光子晶体平板的增强传输效应以及局域性表面等离子体共振现象.这种增强效应来自于两个不同的等离子体共振机制:由长方形空气孔形成的局域波导共振以及由周期性结构引起的光子晶体共振效应.对于由长方形空气孔形成的局域波导共振模式,其等离子体波全部局域在整个长方形空气孔区域中.而由周期性引起的共振模式,其频率随着金属平板表面周期性的变化而变化,相应的等离子体波分布在长方形空气孔区域的两端.产生的表面等离子体都局域在长方形空气孔区域中,电场强度得到了显著的增强.
关键词:
光子晶体
金属平板
超强透射
表面等离子体 相似文献
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用MCHFR自洽场方法,结合自行设计的最小二乘拟合程序,计算了与软X射线激光研究有关的类锗离子Ru12+到Cd16+的4s24p2,4s4p3,4s24p5s组态能级、波长和振子强度。计算结果与实验进行了比较。 相似文献
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有限元模型比知识的获取和形式化是有限元模型化专家系统建立的核心。本文以信息论为工具,在总结大量工程经验和理论研究成果的基础上,建立了工程结构模型化知识系统,它分为两个层次,一是复杂结构模型化,二是简单结构模型化。后者是前者的基础,包括力学模型化、有限元模型化和网络生成三部分。这些知识均已溶人了作者开发的专家系统之中。 相似文献
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神经网络在冲击地压危险性预测预报研究中的应用 总被引:1,自引:0,他引:1
分析了影响冲击地压危险性的主要因素,首次利用神经网络模型模拟各个因素之间的复杂的非线性关系,消除了传统预测方法中的人为确定冲击危险指标的影响。检验结果表明 :模型可靠,预测精度高。为冲击地压与人工智能等高新技术的进一步结合奠定了基础。 相似文献
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采用聚焦离子束直写技术,成功制作了面积为200μm×200μm,线密度500 mm 1,圆孔直径800 nm,金吸收体厚度为500 nm的单级衍射量子点阵光栅.研究了该光栅在波长442 nm激光下不同传输距离的衍射特性以及相对衍射效率.实验结果表明,量子点阵光栅不存在高级衍射,只保留了±1级和0级衍射,具有良好的单级衍射特性.1级衍射与0级衍射间距随传输距离的增大而增大,实测值与理论计算值相符. 相似文献
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