نتایج جستجو برای: mrr

تعداد نتایج: 1035  

2006
Yasutomo Kimura Kenji Araki

We propose a query expansion method using Genetic Algorithms(GA) in Japanese. Recently, question answering research focuses on contextual questions. Therefore a question answering system has to resolve contextual problems by using both previous questions and previous answers. This problem is largely related to query expansion because of the need to find new keywords. In the contextual processin...

2013
Dipesh Popli Ravi Pratap Singh Meenu Gupta

The selection of optimum process parameters is crucial for advanced machining processes, as these processes incur high initial investment, tooling cost, and operating and maintenance costs. In this paper, a review of machining process parameters for different materials is done in ultrasonic machining (USM). Machining of Different materials like ceramics, Glass Porcelain, Titanium, is done by di...

2012
C. Sharma

In this paper an attempt has been made to correlate the usefulness of electrodes made through powder metallurgy (PM) in comparison with conventional copper electrode during electric discharge machining. Experimental results are presented on electric discharge machining of AISI D2 steel in kerosene with copper tungsten (30% Cu and 70% W) tool electrode made through powder metallurgy (PM) techniq...

2009
J. Valentinčič I. Sabotin M. Junkar

Micro-electrical discharge machining is an evolution of conventional EDM used for fabricating three-dimensional complex micro-components and microstructures with high precision capabilities. The material removal process has stochastic nature and is still not fully understood. This paper presents experimental results on observing the material removal rate (MRR) in dependence of alternating machi...

2014
Hao Li Biqin Dong Zhen Zhang Hao F. Zhang Cheng Sun

Photoacoustic microscopy (PAM) does not rely on contrast agent to image the optical absorption contrast in biological tissue. It is uniquely suited for measuring several tissue physiological parameters, such as hemoglobin oxygen saturation, that would otherwise remain challenging. Researchers are designing new clinical diagnostic tools and multimodal microscopic systems around PAM to fully unle...

2012
S. Boopathi K. Sivakumar R. Kalidas

Wire Electrical Discharge Machining (WEDM) is a non-traditional thermo-electric process capable of machining hard materials of highly complex three dimensional shapes. In this paper, the dry WEDM experimentation is conducted using oxygen as a dielectric medium. The deionized water is replaced by the oxygen as a dielectric medium to ameliorate the environmental impact in the machining surroundin...

2009
Kirkland W. Davis

Introductory Comments: Direct MR arthrography (MRR) consists of MR imaging of a joint after injecting dilute gadolinium or straight saline into the joint. Over the last decade, this technique has become widely accepted for imaging numerous intraarticular disorders. Prior to that, CT arthrography (CTR) had been gaining steam as an improvement in imaging some joints over standard contrast arthrog...

2016
Krishan Kant

CNC Turning is basically a material removal process done to obtain the desired diameter. Even though the machine tool industry has made tremendous progress, the metal cutting industries using various machine tools continue to suffer from major drawback of not utilizing the machine tools at their full potential. A major cause leading to such a situation is thought to be the failure to run the ma...

Journal: :Mechanisms of Development 2002
Yueh-Jung Chen Chuen-Sheue Chiang Li-Chuan Weng Judith A Lengyel Gwo-Jen Liaw

During embryogenesis, the activated Torso receptor tyrosine kinase (TOR RTK) pathway activates tailless (tll) expression by a relief-of-repression mechanism. Various lines of evidence have suggested that multiple factors are required for this repression. We show that Tramtrack69 (TTK69) binds to two sites within tll cis-regulatory DNA, TC2 and TC5, and that TTK69 is phosphorylated by mitogen ac...

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