摘要:

Experimental studies are described to show that high-frequency radio observations provide a simple way to monitor the E.D.M. process and to distinguish between the effective spark and arc discharges. The paper also describes how radio frequency emitted during machining could be used to optimize the E.D.M. process.

ISSN:0020-7543    

DOI:10.1080/00207547808930027

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The purpose of this paper is to illustrate an approach to determining a minimum cost operating regimen for n continuous processing machine centre. A variational analysis is employed to determine an optimal processing trajectory, and from this an approach to establishing an upperbound on the theoretical number of machines employed in processing can be established

ISSN:0020-7543    

DOI:10.1080/00207547808930028

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

This paper outlines the use of the goal programming technique in selecting levels of machining parameters in a fine turning operation on A1S1 4140 steel using cemented tungsten carbide tools. Goals that are proposed to be achieved are: (i) to finish turning the required depth in one pass, mid (ii) to finish turning within a stipulated time. Constraints used are: R.M.S. surface finish values, cutting horse power of the machine, ranges for cutting speed, feed and depth of cut. A predictive equation to predict the R.M.S. Surface roughness values from the machining variables, cutting speed, feed, depth of cut, and time of cut was used. This mathematical model was developed using stepwise regression analysis on the experimental data for 1/64 in. nose radius cemented tungsten carbide cutting tool. Experiment with the machining variables at different levels were performed to obtain the data. A statistically designed experiment called the rotatable design was used for the experimental design

ISSN:0020-7543    

DOI:10.1080/00207547808930029

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Most of the decisions in production management require simultaneous study of interdependent subsystems. In this paper we propose a compatibility matrix which can be used as a possible aid for integrating production decisions. The compatibility matrix generates decision alternatives for a production system, given the decision alternatives for its subsystems and compatibility relationships between each alternative of a subsystem and all the alternatives of the remaining subsystems. The mutually-exclusive decision alternatives provide the manager with a wide range to choose from. These alternatives can be used as inputs to mathematical simulation models. For ill-structured problems the compatibility matrix offers a viable tool in achieving synergy

ISSN:0020-7543    

DOI:10.1080/00207547808930030

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

This paper presents an information theory approach to the ranking problems from the viewpoint of mutual information. The method, accompanied by a few illustrative examples, enables one to obtain the optimal ranking most appropriate to the empirical data. The approach in this study is believed to stimulate a much wider scope to the production researcher's mind

ISSN:0020-7543    

DOI:10.1080/00207547808930031

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Continuous monitoring of heart rate, respiration rate and galvanic skin resistance was done for 5 days on five subjects while they assembled drum brake cylinders. Cycle time and number of errors committed (unsuccessful hand movements) were also recorded. The subjects were required to perform the paced, repetitive task over an 8-hour period. Scheduled breaks, similar to local factories, were adhered to. A simple reaction test was given to measure attention. ANOVA on data showed that well rested subjects had higher physiological readings and committed more errors than subjects who had less sleep. An increase in CT and variability seems to be an indication of decrement in work performance and a rest period is needed. An increase in all four parameters is another indicator of poor performance (increase in errors). The simple repetitive task seems to be not motivating enough to keep the worker's attention and keep him aroused enough to work at his peak performance level

ISSN:0020-7543    

DOI:10.1080/00207547808930032

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

This experimental study analysed the effects of the complexity (entropy) of a repetitive tusk on the human looming function for the task. The results from 20 subjects revealed that the task entropy had a significant influence on the relationship between the performance (cycle time) and practice (the number of repetitions or cycle number). The model parameters for this relationship were found to be significantly and linearly related to the task entropy, the nominal rate of which varied within the maximum range of 0·9·to 6.1 bits/s

ISSN:0020-7543    

DOI:10.1080/00207547808930033

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547808930034

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor