摘要:

A model is.proposed for the systematic arrangement of work element times. This model consists of a grouping of all work element times along the time co-ordinate either in groups of equal size or with the time span of each group increasing with the mean time of each group. The statistical properties in analysing work by means of data thus arranged are investigated. A comparison is madewith the sampling error.of.such,data, the observational error, when the error consists of referring the work elements to the wrong group, and the natural variation of the performance time.

ISSN:0020-7543    

DOI:10.1080/00207546708929785

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

Die Analyse eines umfangreichen Untersuchungsmaterials und derzeit durchgeführter ergänzender Untersuchungen soll uns die Prüfung von Hypothesen gestallen, die sowohl für die Theoriebildung als auch für die Praxis der Eignungsdiagnostik relevant zu sein scheinen. Diese Hypothesen werden wie folgt formuliert:

ISSN:0020-7543    

DOI:10.1080/00207546708929786

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

Standard tests for metal arc welders are based on the quality of the weld, for which many factors are beyond the control of the welder. Therefore tests fail to provide an exclusive measure of the skill of the welder. In this paper, an assessment of the arc length maintained by the welder is proposed as an additional test.

ISSN:0020-7543    

DOI:10.1080/00207546708929787

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

There is evidence to support the view that little analysis is used in the design of control systems for sequential machines. This paper outlines a design technique for such machines, taking a specific sequence as an illustration. The techniques used for the simplification of Boolean functions are included in an abbreviated form.

ISSN:0020-7543    

DOI:10.1080/00207546708929788

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

A parallel processor shop was modeled in order to simulate its performance, with respect to certain criteria, when jobs were dispatched to machines by various priority dispatching rules. Several rules which have shown good performance in pure job shop studies, as well as a new weighted objective rule, were tested in the modeled environment.

ISSN:0020-7543    

DOI:10.1080/00207546708929789

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

The calculation of economic lot sizes with more than one constraint on the system is a recognized problem in inventory control theory. This paper presents a simplex like solution procedure. The algorithm as presented can be readily adapted to other constraints which may arise in a specific application. The essential conditions for application are that the non-linear constraints and/or objective function be differentiable, convex functions.

ISSN:0020-7543    

DOI:10.1080/00207546708929790

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

The theory of wire drawing is modified to allow calculation of a hydrodynamic film thickness and viscous friction coefficient using Reynolds's equation for the lubricant. Two cases, viz. (i) constant film thickness, (ii) exponential variation in film thickness, have been studied. The film thickness is determined by the principle of minimum rate of entropy production. It is shown that the apparent coefficient of friction varies significantly within the die. At small reductions there is an optimum die angle and under certain conditions there may be no optimum die angle. With the increase in speed (beyond some critical value) the drawing stress reduces.

ISSN:0020-7543    

DOI:10.1080/00207546708929791

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor