一阶线性中立型方程组及任意阶线性中立型方程的周期解

该文给出一阶常系数线性中立型方程组以及任意阶常系数线性中立型方程的周期解存在的充要条件．     

SCP—Fourier级数的可和性

利用ＳＣＰ积分的分部积分公式建立了ＳＣＰ-Ｆｏｕｒｉｅｒ级数的概念，并讨论了ＳＣＰ-Ｆｏｕｒｉｅｒ级数的可和性问题．     

The lower orders of Dirichlet and random Dirichlet series

the formulas of the lower orders of Dirichlet series are given by means of the exponents and the convex regularized sequences of the logarithms and the convex regularized sequences of the logarithms of the moduli of the coefficients. Corresponding results are obtained for some random Dirichlet series. Yu Jiarong: born in Nov. 1920, Professor, Current research interest is in complex analysis Supported by the National Natural Science Foundation and the Doctoral Programme Foundation of China     

正交四值函数

利用多值逻辑和正交函数理论，提出一种新的正交函数－正交四值函数，并作了严格的定义及前８个正交四值函数的图形，指出这种函数可以展开成四值函数级数，且按最小均 方逼近误差理论，得到了当它展开成级数时的系数Ｃｊ。     

非线性动力学方程的Neumann级数—直接积分解法

提出了用直接积分和Ｎｅｕｍａｎｎ级数相结合求解非线性动力学方程的方法，并用算例验证了该方法的有效性。     

时间序列的小波神经网络预测模型的研究

针对非线性时间序列,建立了小波神经网络预测模型,通过计算小波分解和小波级数,达到最优的逼近效果．经实例验证,该方法能有效地提高预测精度,避免了人工神经网络模型的固有缺陷.     

论虚元素

介绍了传统网络和ＢＡＮＴ网络关于虚元素问题的研究并揭示了传统网络关于虚元素构图存在的问题．在此基础上．本文论证了虚元素问题是网络计划技术的一个基础理论问题,并指出：ＢＡＮＴ网络建立了该基础理论即虚元素基础理论．     

论大宝山矿床成因

通过对大宝山矿区各矿床产出的地质环境，矿体产状，矿石类型和结构构造，矿石稳定同位素特征，稀土元素特征，成矿温度等方面的研究，论证矿区的成矿历史分２个成矿期，４个成矿介段，即中泥盆世多金星成矿期的铜铜锌银硫化物成矿阶段，菱铁矿成矿阶段；早白垩世铁钼钨成矿期的铁钨成矿阶段，钼钨成矿阶段，各阶段均有各自的成矿地质环境和成矿方式，构成一个在空间上关系密切，成历上有一定联系，时间上差别明显的矿床系列。     

Periodically integrated subset autoregressions for dutch industrial production and money stock

The univariate quarterly Dutch series of industrial production and money stock are both modelled with a periodically integrated subset autoregression (PISA). This model for a non-stationary series allows the lag orders, the values of the parameters and the cyclical patterns to vary over the seasons. The PISA models are found by applying a general-to-simple specification strategy, which deals with non-stationarity and periodicity simultaneously. It is found that the two series show a common asymmetric cyclical behaviour. This paper further proposes a test for periodicity in the errors, with which it is argued that a non-periodic model for the industrial production and money stock is misspecified and that seasonal adjustment does not remove periodicity in the autocorrelation function.