论现代科学视域下工程哲学发展的新思路

量子理论的测不准原理,将观察者与被观测对象合为一个整体的思路无疑应对工程有相当重要的启迪。对于工程而言,科与玄再不必睚眦论战,科学将与人生观及其衍生价值观一起,成为工程的指导原则,科学与人文在工程哲学层面上可以交汇统一而不必保持对立。而代表着对工程前瞻式的指引后顾式的反思的工程哲学,亦将不只是研究人工物,也将研究人。     

从爆破音变体的语流环境看音系结构特征

爆破音的种种变体,不仅仅是一种单纯的发音问题,还在一定的程度上从一个侧面反映了英语音系结构的特征;英语爆破音变体发生的语流环境是一个外显的语音现象,在深层次上受着英语特有的音系结构的支持,而且,多变的语音受着固定不变的音系结构支持。这些特征决定了音系结构是非线性的。     

非线性理论与创造性思维方式

现存物理的、社会的和精神的实在都是非线性的和复杂的,人类的生态、经济和政治问题已经成为全球的、复杂的和非线性的问题。为在非线性的世界中进一步开发人类的创造性,研究了创造性思维发生的内在机制,发现非线性理论与创造性思维方式之间有密切关系。本文介绍了思维与思维方式、再造性思维与创造性思维的概念,研究了非线性理论与创造性思维方式的关系。研究结果表明:非线性理论对创造性思维方式有极大的贡献,非线性思维最具创造性,有机结合各种非线性思维方式是非常重要和极为必要的。     

驱散“非线性”的迷雾

“非线性”本来是一个数学概念,只有运用数学语言才能对它进行严格精确的定义。非线性概念的哲学化,造成了语义混乱,并引起了无谓的哲学争论。哲学的任务在于语义明晰,在于不断地澄清问题,在于澄清语言混乱现象,而不是要制造虚假的哲学问题。     

International Business Cycle Asymmetry and Time Irreversible Nonlinearities

Using tests of time reversibility, this paper provides further statistical evidence on the long-standing conjecture in economics concerning the potentially asymmetric behaviour of output over the expansionary and contractionary phases of the business cycle. A particular advantage of this approach is that it provides a discriminating test that is instructive as to whether any asymmetries detected are due to asymmetric shocks to a linear model, or an underlying non-linear model with symmetric shocks, and in the latter case is informative as to the potential form of that nonlinear model. Using a long span of international per capita output growth data, the asymmetry detected is overwhelmingly consistent with the long standing perception that the output business cycle is characterized by steeper recessions and longer more gentle expansions, but the evidence for this form of business cycle asymmetry is weaker in the data adjusted for the influence of outliers associated with wars and other extreme events. Statistically significant time irreversibility is reported for the output growth rates of almost all of the countries considered in the full sample data, and there is evidence that this time irreversibility is of a form implying an underlying nonlinear model with symmetrically distributed innovations for 15 of the 22 countries considered. However, the time irreversibility test results for the outlier-trimmed full sample data reveal significant time irreversibility in output growth for around one half of the countries considered, predominantly in Northern Europe and North America, and of a form implying a nonlinear underlying model in only a further half of those cases.     

Portmanteau tests for linearity of stationary time series

This article considers the problem of testing for linearity of stationary time series. Portmanteau tests are discussed which are based on generalized correlations of residuals from a linear model (that is, autocorrelations and cross-correlations of different powers of the residuals). The finite-sample properties of the tests are assessed by means of Monte Carlo experiments. The tests are applied to 100 time series of stock returns.     

二阶非线性时滞微分方程的振动性

本文讨论了一类二阶非线性泛函微分方程的振动性,给出方程振动的若干充分条件．     

On testes for threshold–type nonlinearity in irregulaly spaced time series

Formulating the model first in continuous time, we have developed a state space approach to the problem of testing for threshold-type nonlinearity when the data are irregularly spaced.     

门槛面板单位根模型及中国区域经济增长的非线性

基于面板门槛单位根模型,利用可行广义最小二乘法（KH5）,运用bootstrap模拟计算临界值的方法,从新的视角研究我国区域经济发展趋势特征。研究结论表明：中国区域经济增长呈现出显著非线性转换特征,经济增长率在收敛的方式上存在着显著的门槛效应。第一组的部分区域在区制I中（小于门槛值1．81）表现绝对收敛的转移动态,反之,则表现为条件收敛;第二组以及第三组中的部分区域在其所对应的区制I均表现为绝对收敛,而在区制Ⅱ中则为发散的。