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121.
The paper deals with an experimental investigation of the behavior of high-frequency Si/SiO2/Al based interconnects when an extra DC bias voltage is applied, by means of which the conductor line changes the surface properties of the semiconductor substrate. By superposing a DC bias to the high-speed signal applied to the line, the insertion losses caused by the semiconductor substrate show a significant decrease over the observed frequency range. In order to study this effect a number of test samples containing several microstrip asymmetric transmission lines were prepared and measured. The obtained results suggest a way of controlling the performance and energy propagation of interconnects on semiconductor substrates. The observed effect can be successfully applied in high-speed blocks with tunable parameters. 相似文献
122.
Florian Pfender 《Discrete Mathematics》2009,309(9):2922-2924
We show that line graphs G=L(H) with σ2(G)≥7 contain cycles of all lengths k, 2rad(H)+1≤k≤c(G). This implies that every line graph of such a graph with 2rad(H)≥Δ(H) is subpancyclic, improving a recent result of Xiong and Li. The bound on σ2(G) is best possible. 相似文献
123.
非线性编辑中场序的判断及处理 总被引:1,自引:1,他引:0
非线性技术与电视领域在场方式处理方面的差异常导致一些问题的发生,这些问题往往会导致原本"完美"的电视画面变得不完美.下面就此问题进行分析并探讨解决方法. 相似文献
124.
125.
Nitric acid (HNO3) plays an important role in the Earth’s atmosphere as a reservoir molecule of NOx species. It has a strong infrared signature at 11 μm which is one of the most commonly used for the infrared retrieval of this species in the atmosphere since this spectral region coincides with an atmospheric window. It is therefore essential to have high quality spectral parameters in this spectral region. For the H14NO3 (main) isotopic species, the 11 μm bands were already the subject of numerous extensive studies which involve not only the ν5 and 2ν9 cold bands but also the first hot bands. The present work is the first high resolution Fourier transform analysis of the 11 μm bands for H15NO3, which is the second most abundant isotopomer of nitric acid [a ≅ 0.00365(7)]. In this way, the analysis of the ν5 and 2ν9 cold bands centered at 871.0955 and 893.4518 cm−1 was performed, and as for H14NO3, these bands are significantly perturbed since rather strong resonances couple the 51 and 92 rotational levels. The theoretical model that we used to compute the line positions and line intensities is directly issued from the one which we used recently for H14NO3 [A. Perrin, J. Orphal, J.-M. Flaud, S. Klee, G. Mellau, H. Mäder, D. Walbrodt, M. Winnewisser, J. Mol. Spectrosc. 228 (2004) 375-391]. Actually, for the H15NO3 line positions, the Hamiltonian matrix accounts for the rather strong Fermi and the weaker Coriolis interactions linking the 51⇔92 rotational levels. Using this model which accounts correctly for the strong mixing of the 51 and 92 upper state energy levels, the ν5 and 2ν9 line intensities for H15NO3 were satisfactorily computed using the ν5 and 2ν9 transition moment operators achieved previously for the 14N (main) isotopic species. In this way, the transfer of intensities from the ν5 fundamental (and presumably strong) band to the 2ν9 overtone (and presumably weak) band could be explained for H15NO3 as it was done previously for the 14N (main) isotopic species. Finally, the position of the H15NO3ν5 + ν9 − ν9 hot band was identified at 875.245 cm−1. 相似文献
126.
Andrew Janca P.F. Bernath N.F. Zobov S.V. Shirin Oleg L. Polyansky Jonathan Tennyson 《Journal of Molecular Spectroscopy》2003,219(1):132-135
Fourier transform emission spectra were recorded using a mixture of H2O and D2O at a temperature of 1500 °C. The spectra were recorded in three overlapping sections and cover the wavenumber range 1800-3932 cm−1. This spectrum is analyzed together with a previously reported one spanning the 380-2190 cm−1 range [Parekunnel et al., J. Mol. Spectrosc. 2001 (28) 101]. This analysis leads to 4409 newly assigned HDO emission lines. This work particularly extends data on the (200) and (120) states of HDO for which newly determined energy levels are presented. 相似文献
127.
In modern telephone exchanges, subscriber lines are usually connected to the so-called subscriber line modules. These modules serve both incoming and outgoing traffic. An important difference between these two types of calls lies in the fact that in the case of blocking due to all channels busy in the module, outgoing calls can be queued whereas incoming calls get busy signal and must be re-initiated in order to establish the required connection. The corresponding queueing model was discussed recently by Lederman, but only the model with losses has been studied analytically. In the present contribution, we study the model which takes into account subscriber retrials and investigate some of its properties such as existence of stationary regime, derive explicit formulas for the system characteristics, limit theorems for systems under high repetition intensity of blocked calls and limit theorems for systems under heavy traffic. 相似文献
128.
提出了用多路合成全息语音发音器官图谱显示发音器官动态过程的方法,介绍了该全息图的制作过程,讨论了制作过程中绘制的二维线条图片的线条宽度与全息图的衍射效率之间的关系。研制的多路合成全息图在白光点光源照射下,显现出清晰、明亮的发音器官(唇、舌、齿和软腭等各部分)的动态影像。最后对该图谱的应用前景进行了讨论。 相似文献
129.
Y. Marandet H. Capes L. Godbert-Mouret R. Guirlet M. Koubiti R. Stamm 《Communications in Nonlinear Science & Numerical Simulation》2003,8(3-4):469
We present a spectroscopic investigation of turbulence in the Tore-Supra edge plasma, where deuterium spectral lines are found to exhibit a power-law behavior in their wings. Such a feature is not predicted by the equilibrium line broadening theory in the conditions of the edge plasma, where the thermal Stark effect is negligible. Therefore, the possible role of turbulence is investigated along two separate paths. Indeed, both the Stark and the Doppler profiles may differ significantly from the equilibrium profiles. 相似文献
130.
数字微波共面带线非线性终端瞬态特性模拟及分析 总被引:1,自引:0,他引:1
用FD-TLM法对高速数字微波共面带线端接电阻及非线性终端──半导体二极管时的瞬态响应特性的模拟及分析,并提出一种适用于处理传输线结构终端吸收边界问题的简单、实用的方法。 相似文献