杭州汽轮机厂计算机集成制造系统——HTW-CIMS

本文介绍了杭州汽轮机厂计算机集成制造系统HTW-CIMS的总体方案以及开发和应用该系统时遵循的技术路线。     

Exploring the Myth of Unhappiness in Former Communist Countries: The Roles of the Sex Gap in Life Expectancy and the Marital Status Composition

National average happiness and the difference in happiness between women and men are positively correlated in European countries. This study focuses on this cross-country relationship and tests (1) whether, after controlling for socio-economic factors, the correlation is attributed to their direct relationship, or, alternatively, explained by the sex difference in life expectancy, and (2) whether the correlation is not only exogenously explained but also endogenously generated by the sex difference in life expectancy. Performing regression analyses, this study shows that the correlation between happiness and its sex difference is spurious, and that the sex difference in life expectancy generates this correlation and accounts for about one-third of the correlation. A decline in happiness influences men’s mortality more than women’s, and widens the life expectancy gap between women and men. This in turn raises the widowhood ratio among women, lowers women’s average happiness, and reduces the happiness gap between women and men. The results obtained in this study points to the importance of controlling for the demographic composition of the population when we use aggregate happiness measures as national happiness indicators.     

海德格尔论学术出版——"曾经在场的启示"读后感

海德格尔的＂曾经在场的启示＂一文用哲学的言语诠释了学术出版的核心价值和道德要求。他指出：学术出版者要聚集一批具有学术精神的学者;出版者应具有敏锐的出版艺术和坚定的出版策略;学术出版只有担当起历史的责任,才能经受住历史的考验,体现出学术的价值。     

Optimum chemical balance weighing designs for estimating the total weight

This deals with chemical balance weighing designs which attain a lower bound for the variance of the estimated total weight, The results extend those of Chacko Dey (1978).     

Inequality for equireplicated n-ary block designs with unequal block sizes

It is shown that certain inequalities known for binary, equireplicated, equiblock-sized block designs remain valid for equireplicated n-ary block designs with unequal block sizes. The approach used here is based on the spectral expansion of the C-matrix of the block design. The main theorems include some useful and combinatorially interesting results.     

A new special class of peb designs

A new class of partially efficiency-balanced designs is introduced from a practical point of view. This new design includes all equireplicated incomplete block designs available in literature as special cases. The fundamental properties of the design are clarified with relation to other block designs.     

计算机集成制造与成组技术

成组技术(GT)和计算机集成制造(CIM)是两种改变传统的机械制违中多品种、小批量制造企业落后面貌的先进技术和方法。本文探讨了这两种技术之间的关系,着重说明以下问题:GT通过对系统的简化而成为CIM的基础;以CIM思想为指导开发GT系统,不仅可取得较好的近期效益,而且随着企业计算机应用水平的提高,可在GT系统的基础上建立起CIM系统。本文最后对一个实际工厂目前正在实施的GT系统和正在规划的CIM系统的关系作了探讨。     

DELAY ESTIMATION BY A HILBERT TRANSFORM METHOD

This paper describes an estimation of the time delay between two stationary time series signals, in which an input signal is measured with little noise and an output signal is the sum of a noise and the response from a linear system. We use the Hilbert transform relation for minimum delay systems to estimate the time delay. Some computer simulation results are given to evaluate the performance of the proposed method.     

Constructions of efficiency-balanced designs

We present a number of methods of constructing efficiency-balanced binary block designs which are design patterns for simplification of statistical analysis. Furthermore, a method of construction of an efficiency-balanced block design with v+1 treatments from one with v treatments is generally characterized.