共查询到20条相似文献,搜索用时 0 毫秒
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Bellare 《Journal of Cryptology》2008,15(4):271-284
In theoretical cryptography, one formalizes the notion of an adversary's success probability being ``too small to matter' by asking that it be a negligible function of the security parameter. We argue that the issue that really arises is what it might mean for a collection of functions to be ``negligible.' We consider (and define) two such notions, and prove them equivalent. Roughly, this enables us to say that any cryptographic primitive has a specific associated ``security level.' In particular we say this for any one-way function. We also reconcile different definitions of negligible error arguments and computational proofs of knowledge that have appeared in the literature. Although the motivation is cryptographic, the main result is purely about negligible functions. 相似文献
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本文讨论了M序列的自相关性,并证明了:当0<|t-2^n-1|≤[n-1/2]时,|CM(t)|≤2^n-1。 相似文献
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A Note on Symmetric Boolean Functions With Maximum Algebraic Immunity in Odd Number of Variables 总被引:2,自引:0,他引:2
Longjiang Qu Chao Li Keqin Feng 《IEEE transactions on information theory / Professional Technical Group on Information Theory》2007,53(8):2908-2910
In this note, it is proved that for each odd positive integer n there are exactly two n-variable symmetric Boolean functions with maximum algebraic immunity. 相似文献
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This letter introduces new algorithms for passivity verification and compensation of macromodels constructed from delayed rational functions in the scattering domain. For passivity verification, a frequency-dependent generalized eigenvalue is formulated, which is used to accurately determine the regions of passivity violation. For passivity compensation, first order perturbation theory is used to iteratively perturb the residues of the system until passivity is achieved. Numerical results validating the proposed algorithms are presented. 相似文献
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In this paper a straightforward z-domain procedure for realizing multidimensional transfer functions with either numerator or denominator polynomial separable is presented. This procedure yields structures with minimum number of multipliers. It is shown that the number of delay elements can be reduced by selecting the optimum values for certain parameters. To facilitate this theorems that are applicable for some special cases are presented. 相似文献
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《Microwave Theory and Techniques》1971,19(11):891-892
A symmetrical cascade of N commensurate transmission lines having equal ripple performance over a passband centered at the quarter-wavelength frequency may be synthesized using Achieser (or Zolotarev) polynomials for N odd. This correspondence identifies the solution of the case where N is even, and a new class of functions which complement these polynomials is identified. 相似文献
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Charest A. Saraswat D. Nakhla M. Achar R. Soveiko N. 《Microwave and Wireless Components Letters, IEEE》2007,17(12):828-830
This letter introduces a new method for compact macromodeling of high-speed circuits with long delays, characterized by tabulated time-domain data. The algorithm is based on partitioning the response and subsequently approximating each partition with a low-order sum-of-exponentials, delayed in time-domain. This results in a compact low-order macromodel in the form of delayed-differential equations, which can be efficiently analyzed using SPICE like simulators. 相似文献
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《IEEE instrumentation & measurement magazine》2007,10(3):40-42
For pt.I see ibid., vol.9, p.13-15, (2006). In this article the author has listed the basic steps in computing the inverse Laplace transform of a rational function H(s). 相似文献
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Generalized Rational Function Approximation in Finite Intervals Using Zolotarev Functions 总被引:1,自引:0,他引:1
《Microwave Theory and Techniques》1970,18(12):1052-1064
The results of Chebyshev in the theory of approximation find wide application in the design of circuits and microwave components. Part of the comparatively unknown work of Zolotarev and Achieser which has found useful applications in the design of certain microwave components, especially of mixed lumped/distributed components, is described. Several new results are presented, including formulas which enable the approximation functions to be computed in a relatively simple manner. 相似文献
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A computer program is described for the preparation of decision tables (based upon observed statistics) for diagnosis. The procedure does not depend upon the assumption that symptoms occur independently. The program is intended for preliminary diagnosis or screening, therefore it should have value as a device of preventive medicine. This program is available from SHARE as HO BC CRIT. 相似文献
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Discrete polynomials of special type are widely used in digital filter design, signal processing, image processing, and control systems[1]. Haddad et al. introduced binomial sequences to synthesize digital filters for signal and image processing[2-3]. Aburdene et al. shown a method for computing discrete polynomial (Hermite, binomial and Laguerre) transform representation using binary matrices and flow diagrams[4] and developed a new discrete transforms using Pascal polynomials for applicatio… 相似文献
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Ohnaka K. Inoue K. Uno T. Hasegawa K. Hase N. Serizawa H. 《Quantum Electronics, IEEE Journal of》1985,21(8):1236-1240
A planar structure monolithic optoelectronic integrated circuit (OEIC), comprising an InGaAs PIN photodiode and an InGaAs junction field effect transistor (JFET), has been developed. A cutoff frequency of 1.3 GHz has been successfully obtained. A low dark-current characteristic has also been obtained by polyimide passivation. Design principle, fabrication procedures, and operation characteristics of the PIN/JFET are described. 相似文献
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Cheng-Kuang Liu Cheng-Yie Chou 《Electromagnetic Compatibility, IEEE Transactions on》1995,37(4):589-592
RFI effects on PIN diodes were studied experimentally for various light powers. It is shown that by operating a diode in a photovoltaic mode it is much more susceptible to RFI than by operating it in a photoconductive mode. The RF-frequency and RF-power dependences of the interference effect are illustrated. A method of predicting the combined effects of light illumination and RFI is suggested. Methods of avoiding this interference are discussed 相似文献
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Robert H. Caverly 《International Journal of Electronics》2013,100(8):511-520
The reactive component of a PIN diode is known to be a function of current due to conductivity modulation in the I-region. This reactive component can negatively influence predicted attenuation levels in PIN diode attenuators if not properly accounted for. A figure of merit based on the PIN diode parameters, DC forward current, and operation frequency, is proposed that determines the operating conditions where this reactive component can be safely ignored. Simulations and measurement data on PIN diodes of various I-region widths verify the proposed figure of merit. 相似文献
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文章对一种主要应用于光纤有线电视(CATV)中的集成光波分复用的单PIN探测器进行了分析和实验,该器件用于数据的上传、下载以及CATV信号的接收.实验指标可以满足:响应度在1 550 nm波段>0.9 A/W,插损<0.8 dB,1 550 nm隔离度>20 dB,回损>45 dB,双通道二阶互调非线性指标(CSO)>70 dB,工作温度为-40~85℃. 相似文献
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大数据分析作为当下的热点概念,得到越来越多的重视。但大数据不是万能的,它有自身的局限性,过分依赖大数据会产生很多问题。针对这一观点,文章分析列举大数据自身存在的局限性,概括在进行大数据分析时需要注意的问题,提出在做大数据分析时,应当把大数据做小的处理方式。 相似文献