نتایج جستجو برای: di erence
تعداد نتایج: 255893 فیلتر نتایج به سال:
A family of scaling corrections aimed to improve the chi-square approximation of goodness-oft test statistics in small samples, large models, and nonnormal data was proposed in Satorra and Bentler (1994). For structural equations models, Satorra-Bentler's (SB) scaling corrections are available in standard computer software. Often, however, the interest is not on the overall t of a model, but on...
The concept of weighted f Gini mean di¤ erence for convex and symmetric functions in linear spaces is introduced. Some fundamental inequalities and applications for norms are also provided. 1. Introduction The Gini mean di¤erence of the sample a = (a1; : : : ; an) 2 R is de ned by G (a) = 1 2n2 n X
We propose a generalization of the Hukuhara di¤erence. First, the case of compact convex sets is examined; then, the results are applied to generalize the Hukuhara di¤erence of fuzzy numbers, using their compact and convex level-cuts. Finally, a similar approach is suggested to attempt a generalization of division for real intervals.
A q-di erence analog of the sixth Painlev e equation is presented. It arises as the condition for preserving the connection matrix of linear q-di erence equations, in close analogy with the monodromy preserving deformation of linear di erential equations. The continuous limit and special solutions in terms of q-hypergeometric functions are also discussed. Mathematical Subject Classi cations (19...
1 Abstract. This paper examines a class of explicit nite-diierence advection schemes derived along the method of lines. An important application eld is large-scale atmospheric transport. The paper therefore focuses on the demand of positivity. For the spatial discretization, attention is connned to conservative schemes using 5 points per direction. The 4-th order central scheme and the family o...
The maximum time diierence pipelining is an eeective way to increase the clock rate of a circuit. The maximum time diierence pipelined 8 8 2's complement multiplier based on a 1:5m semi-custom HCMOS process discussed in this paper can work nearly three times faster than an ordinary multiplier based on the same technology. Test result shows the majority of the multiplier's time diierence is caus...
This paper considers the security of iterated block ciphers against the di erential cryptanalysis introduced by Biham and Shamir. Di erential cryptanalysis is a chosen-plaintext attack on secret-key block ciphers that are based on iterating a cryptographically weak function r times (e.g., the 16-round Data Encryption Standard (DES) ). It is shown that the success of such attacks on an r-round c...
A family of scaling corrections aimed to improve the chi-square approximation of goodness-oft test statistics in small samples, large models, and nonnormal data was proposed in Satorra and Bentler (1994). For structural equations models, Satorra-Bentler's (SB) scaling corrections are available in standard computer software. Often, however, the interest is not on the overall t of a model, but on...
A family of scaling corrections aimed to improve the chi-square approximation of goodness-oft test statistics in small samples, large models, and nonnormal data was proposed in Satorra and Bentler (1994). For structural equations models, Satorra-Bentler's (SB) scaling corrections are available in standard computer software. Often, however, the interest is not on the overall t of a model, but on...
The method of modi®ed equations is studied as a technique for the analysis of ®nite dierence equations. The non-uniqueness of the modi®ed equation of a dierence method is stressed and three kinds of modi®ed equations are introduced. The ®rst modi®ed or equivalent equation is the natural pseudo-dierential operator associated to the original numerical method. Linear and nonlinear combinations ...
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