comparative study of nanocrystalline sno2 materials for gas sensor application

... development of thick film materials for tin dioxide based gas sensors enabled the fabrication of sensitive and relatively selective gas sensors. However, long-term stability of the sensors remains ... 30 nm for synthesized and commercial SnO 2 , respectively. The temperature range for TXRD study of crystallite growth kinetics was chosen by several reasons. The usual proce...

Ngày tải lên: 19/03/2014, 16:47

... . Performance of the application is measured in terms of character error 2 The result of ME/L2 is better than that reported in Andrew and Gao (2007) due to the use of the variant of L 2 -regularized ... Because of the high-dimensional nature of natural language, it is often easy to generate an extremely large number of features. The challenge of parameter estimat...

Ngày tải lên: 08/03/2014, 02:21

... Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics, pages 100–104, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics A Comparative ... Japan wuxianchao@gmail.com,sudoh.katsuhito@lab.ntt.co.jp, kevinduh@is.naist.jp,{tsukada.hajime,nagata.masaaki}@lab.ntt.co.jp Abstract This paper presents a comparative...

Ngày tải lên: 30/03/2014, 17:20

... amount of SnO 2 than WO 3 is present in the hybrid materials. 3.2. Gas response analysis The gas sensing properties of the different hybrid materials produced were evaluated in terms of the ratio ... 1/250 wt%. For the measurements performed at 250 ◦ C, the response time to 100 ppb and to 500 ppb of NO 2 was around 2 min both for the hybrid materials based on WO 3 and f...

Ngày tải lên: 20/03/2014, 13:05

... Proceedings of the 47th Annual Meeting of the ACL and the 4th IJCNLP of the AFNLP, pages 941–948, Suntec, Singapore, 2-7 August 2009. c 2009 ACL and AFNLP A Comparative Study of Hypothesis ... GIZA++, TER, CLA, IHMM stand for scores of systems for four word alignment me- thods. z MBR decoding slightly improves the per- formance over the best single system for both task...

Ngày tải lên: 17/03/2014, 01:20

... epidemiologic methods; comparative study; smoking; Chinese men. Introduction One of the most important measures for ascer- taining the impact of tobacco on a population is the estimation of the mortality ... smoking was greater for urban males than rural males, both study groups revealed a con- sistent pattern of the effect of smoking on risk of can- cer deaths. TAB...

Ngày tải lên: 26/10/2012, 09:48

... Department of Ophthalmology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran 2 Department of Biochemistry and Nutrition, School of Medicine, Iran University of Medical ... 1. Introduction One of the often seen consequences of the aging process is the development of senile cataract, a disease that affects one of our most precious gifts, that of...

Ngày tải lên: 03/11/2012, 09:49

Ngày tải lên: 07/11/2012, 14:17

... OF CONTENTS ii ABBREVIATIONS vi Chapter I: Introduction 1.1 General introduction 1 1.2 Aims and Objectives of the study 1 1.3 Scope of the study 2 1.4 Method of the study 2 1.5 Organization of ... Department of CFL, VNU for their enthusiasm during my M.A. course. Lastly, I wish to thank the family members and friends of mine for their constant encouragements and suppo...

Ngày tải lên: 07/11/2012, 14:17

... (1996), Pragmatics, Oxford University Press, Oxford. 40 20. Swannell J. (1994). The Oxford Modern English Dictionary, Oxford University Press, Oxford. 41 remain the basis of foreign language knowledge, ... though retained for special purposes. This type of words often appear in the works of formal style in general, in legal documents in particular. Therein; hereby; thereof, whereo...

Ngày tải lên: 07/11/2012, 14:17