A simulation tool for modeling the influence of anatomy on information flow using discrete integrate and fire neurons

There are theories on brain functionality that can only be tested in very large models. In this work, a simulation model appropriate for working with large number of neurons was developed, and Information Theory measuring tools were designed to monitor the flow of information in such large networks. The model’s simulator can handle up to one million neurons in its current implementation by using a discretized version of the Lapicque integrate and fire neuron instead of interacting differential equations. A modular structure facilitates the setting of parameters of the neurons, networks, time and most importantly, architectural changes. Applications of this research are demonstrated by testing architectures in terms of mutual information. We present some preliminary architectural results showing that adding a virtual analogue to white matter called “jumps” to a simple representation of cortex results in: (1) an increase in the rate of mutual information flow, corresponding to the “bias” or “priming” hypothesis; thereby giving a possible explanation of the high speed response to stimuli in complex networks. (2) An increase in the stability of response of the network; i.e. a system with “jumps” is a more reliable machine. This also has an effect on the potential speed of response.     

人性化管理思想的现代运用

人是生产力中最活跃的因素,员工积极性、创造力和增值潜力是组织发展的力量源泉,因此对人的管理也成为组织管理中决定性的因素。而对人的管理的核心问题始终都是对人性问题的研究。当代管理学对人性的假设由经济人、社会人、自我实现人向复杂人转变,而管理理念正在发生根本性的变革,促使管理从科学管理和人际关系管理,向人性化管理转化。由此,探讨和研究人性化管理问题具有较强的现实意义。     

论经济人的理性冲突及行为目标

基于经济人假设的传统经济理论认为人们具有完全理性能力,但现实中行为人的决策理性程度.经常处于完全理性与有限理性两种情境的转换之中.从研究范式和最终行为目标两个视角来看,完全理性情境下人们遵循最优化原则追求决策收益的最大化;而有限理性情境下则遵循决策收益和过程的满意原则.基于经济人的行为心理及认知能力来分析,追求主观幸福感最大化才是人类经济行为的最终唯一目标.建立于行为经济人基础上的经济发展理论与实践.才是一个国家和地区以人为本、和谐发展的必然要求.     

不同语言输入方式与第二语言习得成就之间的关系

问卷调查和一个学期的教学实验表明:对大多数的英语学习者而言,第二语言最常用的输入方式是读,其次是听,读与其四级成绩表现出显著的相关性;且阅读班成绩(每天课后额外阅读2篇文章,难度为i+1)包括平均成绩和阅读单项成绩都明显高于听力班(每天额外听同样的2篇文章)的相应成绩。     

Bayesian point null hypothesis testing via the posterior likelihood ratio

This paper gives an exposition of the use of the posterior likelihood ratio for testing point null hypotheses in a fully Bayesian framework. Connections between the frequentist P-value and the posterior distribution of the likelihood ratio are used to interpret and calibrate P-values in a Bayesian context, and examples are given to show the use of simple posterior simulation methods to provide Bayesian tests of common hypotheses.     

ASYMPTOTIC EXPANSIONS APPLIED TO F-TEST CRITERIA

Using asymptotic expansions of the Kummer hypergeometric function, the sequential. F-test criterion is evaluated asymptotically in terms of the sample size. The continuation region inequalities for the test are inverted and expressed in terms of known test criteria. A rapidly converging algorithm for carrying out the sequential procedure is provided. This makes the F-test easier for the practitioner to use. Almost sure finite termination of the sequential. F-test is asserted by appealing to the continuation inequalities and a heuristic asymptotic expansion of the test criterion. Average stopping times of the sequential procedure for a variety of population means and population number configurations are tabulated. The computer symbolic manipulation program MAPLE was used to derive some formulae.     

企业税务筹划的理论假设、理性选择和实务解析

企业税务筹划的理论假设是在总结业务实践经验的基础上 ,通过逻辑推理得出的判断 ;通过对纳税人行为的成本——收益分析 ,得出税务筹划是企业理性选择的结论。而要进行税务筹划 ,仅有良好的愿望还是不够的 ,它还需要借助一定的条件 ,运用相应的方法才能得以实现。     

A bayesian test for a two-way contingency table using independence priors

One method of testing for independence in a two-way table is based on the Bayes factor, the ratio of the likelihoods under the independence hypothesis H and the alternative hypothesis H. The main difficulty in this approach is the specification of prior distributions on the composite hypotheses H and H. A new Bayesian test statistic is constructed by using a prior distribution on H that is concentrated about the “independence surface” H. Approximations are proposed which simplify the computation of the test statistic. The values of the Bayes factor are compared with values of statistics proposed by Gunel and Dickey (1974), Good and Crook (1987), and Spiegelhalter and Smith (1982) for a number of two-way tables. This investigation suggests a strong relationship between the new statistic and the p-value.     

数理统计：科技英语语法研究的二元属性分析法

科技英语作为一种特殊的语言变体已引起广泛关注。许多学者曾对其进行研究并取得成果 ,但都缺乏必要的数理依据。介绍科技英语的数量统计方法 ,即先对科技文献进行随机抽样 ,进而采用二元属性分析法进行数理统计 ,再附之以归纳与演绎法综合应用从而过滤出数据 ,找出型式 ,这样即可检验现有假设 ,又可为科技英语的翻译及教学提供一个科学范式 ,以规范此领域的工作。