ISSN:0020-7543    

DOI:10.1080/00207547008929823

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The purpose of this study was to investigate physiological modifications which are symptomatic of nervous stress and fatigue

ISSN:0020-7543    

DOI:10.1080/00207547008929824

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

This paper reports the use of two techniques which were used to evaluate the important design parameters in a cranking type task. Namely, electromyography served as an indicator of physiological costs for the task, and biomechanical analysis provided quantitative data concerning the mechanical costs for the task. Both these measures were shown to support the importance of handle radius, torque, and working height as critical criteria in design of a cranking task.

ISSN:0020-7543    

DOI:10.1080/00207547008929825

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

This paper treats work variety as a subjective variable rather than an objective attribute of work. The results of several industrial experiments are outlined in presenting a method for measuring perceived variety in terms of a psycho-physical function. A null finding is reported concerning the relationship between variety and work performance.

ISSN:0020-7543    

DOI:10.1080/00207547008929826

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

According to standard handbooks and inspection practice, screw thread roll gauges are set by employing special master set plugs. In the present paper, formulae are developed to enable thread wires and gauge blocks to serve the same purpose. The appropriate exact formulae, as well as approximate, easily applicable ones, are derived for symmetrical triangular and trapezoidal threads and the non-symmetric case deduced from the previous results.

ISSN:0020-7543    

DOI:10.1080/00207547008929827

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

Earlier investigation has shown that, from the point of view of flank wear, tool-life can be predicted by the initial cutting temperature. This paper presents a correlation between the drill temperature with cutting speed and feed while drilling cast iron and derives the tool-life equation on the basis of temperature data. The equation obtained agrees well with that obtained by conventional test.

ISSN:0020-7543    

DOI:10.1080/00207547008929828

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The analysis of electromagnetic forming has been extended to allow for an approximate evaluation of axial inertia, strain rate and temperature effects. Good agreement is obtained with published measurements of time varying displacement and velocity.

ISSN:0020-7543    

DOI:10.1080/00207547008929829

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

This paper presents a method of assigning tolerances to components so that (a) assemblies composed of the components meet specified functional requirements and (b) the cost of manufacturing all the components to their respective tolerance is minimised. Methods of obtaining tolerance equations from functional equations are briefly reviewed; the “method of extremes” is explained in detail. A relationship between cost and tolerance is derived, based upon published data.

ISSN:0020-7543    

DOI:10.1080/00207547008929830

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

This paper is concerned with the optimal production planning and inventory control. The first problem is a multiperiod production scheduling problem in which the objective is to minimize the operating cost for a planning period. This cost is composed principally of the sum of the production cost and inventory carrying cost. The second problem considers an inventory system with two decision variables in each planning period. These are the production schedule and work force which are to be determined so as to minimize the operating cost which includes the costs of changing the production rate, of changing the work force and of carrying the inventory. The maximum principle in the discrete form is used to reduce both the first problem which hasNdecision variables and the second problem which has2Ndecision variables respectively to a series of two decision variables problems. The so-called sequential simplex pattern search technique is used to determine the optimal values of these two decision variables. Numerical examples are given to demonstrate the method.

ISSN:0020-7543    

DOI:10.1080/00207547008929831

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

Project-appraisal has long been a difficult task in that a number of methods of worth assessment have been proposed which do not necessarily lead to the same conclusion. The purpose of this paper is to bring forth an assessment technique which is theoretically appealing to the manager and is at the same time easy to calculate

ISSN:0020-7543    

DOI:10.1080/00207547008929832

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor