Development of an ultra precision machine tool using a ceramic bed.

development and implementation of an optimized control strategy for induction machine in an electric vehicle

in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...

Dynamic Accuracy Design Method of Ultra-precision Machine Tool

Ultra‐precision machine tool is the most important physical tool to machining the workpiece with the frequency domain error requirement, in the design process of which the dynamic accuracy design (DAD) is indispensable and the related research is rarely available. In light of above reasons, a DAD method of ultra‐precision machine tool is proposed in this paper, which is based on the frequency d...

the effect of using learning logs as a self-assessment tool on the syntactic development among iranian pre-intermediate efl learners

چکیده: هدف از انجام این پژوهش ،بررسی استفاده از یادداشتهای یادگیری به عنوان یکی از ابزار های خود ارزشیابی بر افزایش مهارت دستوری (صورتهای شرطی و مجهول) زبان آموزان در مقطع پیش متوسطه بوده است .بدین منظور یک تست استاندارد در مقطع پیش متوسطه بین 90 نفر زبان آموز در سنین 15 تا 20 سال در آموزشگاه زبان انگلیسی امین و پارسا در شهرستان شاهرود برگزار شد از میان این افراد 60 فراگیر انتخاب شدند. و این 6...

An integrated system for ultra precision machine tool design in conceptual and fundamental design stage

This paper presents an integrated system used for ultra precision machine tool (UPMT) design in conceptual and fundamental design stage. This system is based on the dynamics, thermodynamics and error budget theory. The candidate configurations of the machine tool are first selected from the configuration library or a novel configuration designed by the user, according to the functions of the ma...

Development of Ultra-Fine-Grain Binderless cBN Tool for Precision Cutting of Ferrous Materials