A new approach to the epsilon expansion of generalized hypergeometric functions

Assuming that the parameters of a generalized hypergeometric function depend linearly on a small variable ε$\epsilon$, the successive derivatives of the function with respect to that small variable are evaluated at ε=0$\epsilon =0$ to obtain the coefficients of the ε$\epsilon$-expansion of the function. The procedure, which is quite naive, benefits from simple explicit expressions of the derivatives, to any order, of the Pochhammer and reciprocal Pochhammer symbols with respect to their argument. The algorithm may be used algebraically, irrespective of the values of the parameters. It reproduces the exact results obtained by other authors in cases of especially simple parameters. Implemented numerically, the procedure improves considerably, for higher orders in ε$\epsilon$, the numerical expansions given by other methods.     

Symbols of terror: The witch/vampire, the spider, and the shark.

Three symbols of terror are examined as representations of preoedipal conflicts that intrude upon conscious awareness and. interfere with current functioning. To understand each of these symbols and their origins in a state of chronic terror, it is necessary to understand the complete life history of the patient. All three symbols--the witch/vampire, the spider, and the shark--relate to earliest experiences within the parent/infant dyad. We suggest that although all three symbols relate to the dimension of oral aggression, they can be placed conceptually along a continuum of distance from the quality of humanness. Clinical examples are given to illustrate the use of these symbols by patients in treatment and their theoretical implications. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Your Highness: Vertical Positions as Perceptual Symbols of Power.

Metaphorically, power equals up. Drawing on embodied theories of cognition, the author argues that thinking about power involves mental simulation of space and can be interfered with by perception of vertical differences. Study 1 assessed image schemas for power and found a shared vertical difference metaphor. Studies 2, 3, and 4 showed that the judgment of a group's power is influenced by the group's vertical position in space and motor responses implying vertical movement. Study 5 ruled out that the influence of vertical position on power judgments is driven by valence differences. Study 6 showed that vertical position also influences the power judgment result itself. The evidence suggests that the concept of power is partly represented in perceptual form as vertical difference. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

关于主从触发器若干问题的注解

在对国内若干数字电路教材中主从触发器内容分析的基础上，对主从触发器的含义、图形符号、一次变化等问题进行了探讨，提出了现行教材存在的不足，并给出了处理意见。     

Asymptotic Bias and Variance of Conventional Bispectrum Estimates for 2-D Signals

In this paper, we derive the asymptotic bias and variance of conventional bispectrum estimates of 2-D signals. Two methods have been selected for the estimation: the first one – the indirect method – is the Fourier Transform of the weighted third order moment, while the second one – the direct method – is the expectation of the Fourier component product. Most of the developments are known for 1-D signals and the first contribution of this paper is the rigorous extension of the results to 2-D signals. The calculation of the bias of the direct method is a totally original contribution. Nevertheless, we did all calculations (bias and variance) for both method in order to be able to compare the results. The second contribution of this paper consists of the comparison of the theoretical bispectrum estimate bias and variance with the measured bias and variance for two 2-D signals. The first studied signal is the output of a non-minimal phase linear system driven by a non-symmetric noise. The second signal is the output of a non-linear system with Gaussian input data. In order to assess the results, we performed the comparison for both methods with different sets of parameters. We show that the maximum bias coefficient is the one of the 1-D case multiplied by the dimensionality of the signal for both methods. We also show that the estimate variance coefficient is the 1-D case coefficient with a power equal to the signal dimensionality.Received October 21, 2002; Revised December 2003; Accepted March 25, 2004; First Online Version published in December 2004     

Meaningful symbols as reinforcing stimuli.

An empirical relation was demonstrated between independent variables of meaningfulness (e.g., frequency of associations, evaluation, and prepotency) and dependent variables of reinforcement value (rate of response). Adult college Ss performed in an operant situation to determine the relative reinforcing effects of 3 variables of meaningfulness. The results of a counterbalanced Treatment X Trials analysis of variance demonstrated that exposure to more meaningful stimuli will significantly (p     

The use of art for the study of symbols.

"All symbols function within a complex network of matrices and potential choices which can perhaps be explained up to a point, but not translated into exact equivalences unless a happy accident provides one." Art "was once the servant of symbolism and not symbolism the servant of art. I believe the study of known symbols in artistic contexts, be they in painting, music, or poetry might indeed elucidate to the psychologist what forms, colors, rhythms, or sounds are felt to go with what meanings. They might direct his attention to the old doctrine of decorum which is precisely concerned with the search of such fitting or appropriate matches." The effect of art on the receiver is a multiple kind of message; in the work of art the matrices are not neatly separated; they are telescoped and condensed into one. "The effect of this simultaneity can be dramatic. There is no doubt that Freud's discoveries have enabled us to look deeper both into the consonance and the dissonance of multiple meanings that interlink in the structure of artistic symbols." Historically, art did not begin as self-expression, "but as a search for metaphors commanding assent among those who wanted the symbols of their faith to make visible the invisible, who looked for the message of the mystery." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于导频符号的信道估计算法研究

正交频分复用(OFDM)是一种高效的数字传输技术,因其较高的频带利用率以及抗多径衰落的性能,被视为下一代无线通信的核心技术.信道估计技术是实现OFDM系统的关键技术之一.文中主要研究了OFDM无线系统中基于导频的信道估计算法--LS算法和LMMSE算法, 通过仿真其算法的误码率特性和均方误差性能表明,LMMSE的性能明显优于LS.     

古建制度与符号学立方体讨论提纲

该文力图用符号与图式来准确地表达中国古建筑随时间与空间的变化而变化的规律,以及社会外力与时空变化作用于建筑时的相互影响。在组合的平面中,只有"进入",在视点序列中形成无数个"散点"才可如同观一幅长卷一样清晰再现古建筑原形;社会变迁与对时空的改造是互动的,是有规律可寻的。