期刊文献+
共找到11,515篇文章
< 1 2 250 >
每页显示 20 50 100
Analysis and Design of a Quadrature Down-Conversion Mixer for UHF RFID Readers 被引量:3
1
作者 倪熔华 谈熙 +1 位作者 唐长文 闵昊 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第6期1128-1135,共8页
A quadrature mixer with a shared transconductor stage is analyzed,including voltage conversion gain, linearity, noise figure, and image rejection. The analysis indicates it has better performance than a conventional G... A quadrature mixer with a shared transconductor stage is analyzed,including voltage conversion gain, linearity, noise figure, and image rejection. The analysis indicates it has better performance than a conventional Gilbert mixer pair in commutating mode. A quadrature down-conversion mixer based on this topology is designed and optimized for an ultra high frequency RFID reader. Operating in the 915MHz ISM band, the presented quadrature mixer measures a conversion gain of 12.5dB,an IIP3 of 10dBm, an IIP2 of 58dBm, and an SSB noise figure of 17.6riB. The chip was fabricated in a 0. 18μm 1P6M RF CMOS process and consumes only 3mA of current from a 1.8V power supply. 展开更多
关键词 quadrature mixer shared transconductor stage RFID reader CMOS low power high linearity
下载PDF
Sensitivity and inter-observer variability for capsule endoscopy image analysis in a cohort of novice readers 被引量:5
2
作者 Gary C Chen Pedram Enayati +6 位作者 Tam Tran Mary Lee-Henderson Clifford Quan Gareth Dulai Ian Arnott James Sul Rome Jutabha 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第8期1249-1254,共6页
AIM: To determine the performance of novice readers (4^th year medical students) for detecting capsule endoscopy findings. METHODS: Ten capsule endoscopy cases of small bowel lesions were administered to the reade... AIM: To determine the performance of novice readers (4^th year medical students) for detecting capsule endoscopy findings. METHODS: Ten capsule endoscopy cases of small bowel lesions were administered to the readers. Gold standard findings were pre-defined by gastroenterologists. Ten gold standard "targets" were identified among the 10 cases. Readers were given a 30-min overview of Rapid Reader software and instructed to mark any potential areas of abnormalities. A software program was developed using SAS to analyze the thumbnailed findings. RESULTS: The overall sensitivity for detecting the gold standard findings was 80%. As a group, at least 5 out of 10 readers detected each gold standard finding per recording. All the gold standard targets were identified when the readers' results were combined. Incidental finding/false positive rate ranged between 8.2-59.8 per reader. CONCLUSION: A panel of medical students with minimal endoscopic experience can achieve high sensitivity in detecting lesions on capsule endoscopy. A group of novice readers can pre-screen recordings to thumbnail potential areas of small bowel lesions for further review. These thumbnails must be reviewed to determine the clinical relevance. Further studies are ongoing to assess other cohorts. 展开更多
关键词 Capsule endoscopy analysis Small bowel lesions Novice readers Sensitivity
下载PDF
What are the Differences between Good and Poor Readers?
3
作者 张蓉 《海外英语》 2013年第15期34-37,40,共5页
Reading is a very essential skill in the process of knowledge aqusition,while,effective reading ability is the outcome of the good combination of both time and skills.The differences between good readers and poor read... Reading is a very essential skill in the process of knowledge aqusition,while,effective reading ability is the outcome of the good combination of both time and skills.The differences between good readers and poor reader will be studied in terms of comparisons towards their reading speed,efficiency and reasons behind in the domain of psychological perspectives. 展开更多
关键词 READING KNOWLEDGE ACQUISITION GOOD readers POOR re
下载PDF
An Analysis of the Readers' Roles in the Construction of Meaning in John Donne's The Flea under Reader-Oriented Theory
4
作者 许景城 《海外英语》 2011年第5X期213-217,共5页
Among the sundry studies in China on John Donne's The Flea,there has been none done from the perspective of Reader-Oriented Theory to probe into the readers' roles in the construction of meaning.The present ar... Among the sundry studies in China on John Donne's The Flea,there has been none done from the perspective of Reader-Oriented Theory to probe into the readers' roles in the construction of meaning.The present article under Wolfgang Iser's theories,in a further pursuit of the expansion of the gestalt of such studies on the poem,aims at exploring the readers' active roles in complementing,completing and recreating the textual meaning,and differentiating the implied reader and the actual reader through the poem as well as attempting to fulfill the construction of the reading cognitive model through the interpretation of the conceit the flea. 展开更多
关键词 reader-ORIENTED Theory reader’s ROLES Wolfgang ISER John Donne The FLEA
下载PDF
To our readers: Important questions from the editors/editorial board
5
作者 Andrzej S Tarnawski 《World Journal of Gastroenterology》 SCIE CAS 2018年第40期4615-4616,共2页
This letter proposes updating the World Journal of Gastroenterology(WJG) with several new items and subsections and seeks the readers' input for these suggested changes. In order to further enhance the scope of th... This letter proposes updating the World Journal of Gastroenterology(WJG) with several new items and subsections and seeks the readers' input for these suggested changes. In order to further enhance the scope of the WJG, to make it more interactive, and to accommodate our readers' interest, the editors ask the readers for their input regarding potential new proposed changes and new subsections listed below:(1) new subsection-selected highlights from other related Baishideng Publishing Group world series journals;(2) new subsection-challenging images of the week-a quiz with an answer and references on another page;(3) to re-introduce or restore for some issues the cover page on which selected illustration;(4) new subsection-new hypotheses, new concepts and revisiting old concepts in a short, commentary format;(5) preview of the forthcoming issue articles(title and authors);(6) suggestions submitted by the readers-new topics and initiatives; and(7) additional topic area-molecular basis of gastric/liver diseases as an additional area for articles submitted to the journal. 展开更多
关键词 World Journal of GASTROENTEROLOGY readers’input PROPOSAL Changes New subsections
下载PDF
How Does Headlines Capture Readers——An Analysis of Characteristics of English News Report Headlines
6
作者 张月佳 周超波 谷苏徽 《科技信息》 2013年第16期211-212,共2页
Since the emergence of newspaper,the headline has been the necessity of a news report.The Newspaper headline which takes the crucial part in a news report has been given the responsibility to capture readers,especiall... Since the emergence of newspaper,the headline has been the necessity of a news report.The Newspaper headline which takes the crucial part in a news report has been given the responsibility to capture readers,especially in the environment of highly intense competition of this industry.Even with the application of high technology in the news industry,the significance of the headline is enormously strengthened rather than weakened.On the one hand,the mission of the headline determines its significance.And on the other,its characteristics help to achieve the responsibility.Therefore the particular language adopted in the headline,namely "headlinese",must contain certain features which could appeal readers' attention.This paper will focus on the characteristics of the English newspaper headline and find out how it captures readers. 展开更多
关键词 英语教学 教学方法 课堂教学 阅读教学
下载PDF
Information for Readers
7
作者 《World Journal of Emergency Medicine》 SCIE CAS CSCD 2019年第4期I0002-I0002,共1页
Aims and Scope World Journal of Emergency Medicine(ISSN 1920-8642,CN 33-1408/R),a quarterly journal,publishes peer-reviewed original research articles,review articles including systematic review and meta-analysis,edit... Aims and Scope World Journal of Emergency Medicine(ISSN 1920-8642,CN 33-1408/R),a quarterly journal,publishes peer-reviewed original research articles,review articles including systematic review and meta-analysis,editorials,commentaries,etc in different fields of emergency medicine.The content of articles could be varied in medical,surgical,radiological,pathological,biochemical,physiological and pharmaceutical aspects of the subject areas.The journal also deals with basic sciences and experimental work. 展开更多
关键词 readers SCOPE World JOURNAL EMERGENCY MEDICINE
下载PDF
Information for Readers
8
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2013年第4期338-338,共1页
Hepatobiliary & Pancreatic Diseases International(HBPD INT)Copyright 2013, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com
关键词 WWW Information for readers REPORTS EMAIL
下载PDF
Information for Readers
9
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS CSCD 2016年第5期A2-A2,共1页
Hepatobiliary & Pancreatic Diseases International Copyright 2016,Hepatobiliary&Pancreatic Diseases International.All rights reserved.www.hbpdint.comAims and Scope Hepatobiliary&Pancreatic Diseases Internat... Hepatobiliary & Pancreatic Diseases International Copyright 2016,Hepatobiliary&Pancreatic Diseases International.All rights reserved.www.hbpdint.comAims and Scope Hepatobiliary&Pancreatic Diseases International publishes peer-reviewed original papers,reviews(meta-analysis,systematic review)and editorials concerned with clinical practice and research in the fields of hepatobiliary and pancreatic diseases.Papers cover the medical,surgical, 展开更多
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
10
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2008年第3期226-226,共1页
Hepatobiliary & Pancreatic Diseases International (HBPD INT)Copyright 2008, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
11
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2008年第5期450-450,共1页
Hepatobiliary & Pancreatic Diseases International(HBPD INT)Copyright 2008, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
12
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2011年第2期114-114,共1页
Aims and Scope Hepatobiliary & Pancreatic Diseases International publishes peer-reviewed original papers, reviews (meta-analysis, systematic review) and editorials concerned with clinical practice and research in ... Aims and Scope Hepatobiliary & Pancreatic Diseases International publishes peer-reviewed original papers, reviews (meta-analysis, systematic review) and editorials concerned with clinical practice and research in the fields of hepatobiliary and pancreatic diseases. Papers cover the medical 展开更多
关键词 Information for readers REPORTS EMAIL
下载PDF
Information for Readers
13
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2013年第2期114-114,共1页
Hepatobiliary & Pancreatic Diseases International(HBPD INT)Copyright 2013, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
14
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2008年第4期338-338,共1页
Hepatobiliary & Pancreatic Diseases International(HBPD INT)Copyright 2008,Hepatobiliary & Pancreatic Diseases International.All rights reserved.www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic Dis... Hepatobiliary & Pancreatic Diseases International(HBPD INT)Copyright 2008,Hepatobiliary & Pancreatic Diseases International.All rights reserved.www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic Diseases International publishes peer-reviewed original papers,reviews and editorials concerned with clinical practice and research in the 展开更多
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
15
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2010年第3期226-226,共1页
Hepatobiliary & Pancreatic Diseases International(HBPD INT)Copyright 2010, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic ... Hepatobiliary & Pancreatic Diseases International(HBPD INT)Copyright 2010, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic Diseases International publishes 展开更多
关键词 2010 WWW Information for readers EMAIL
下载PDF
Information for Readers
16
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2010年第5期450-450,共1页
Hepatobiliary & Pancreatic Diseases International (HBPD INT)Copyright 2010, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
17
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2011年第4期338-338,共1页
Hepatobiliary & Pancreatic Diseases International (HBPD INT)Copyright 2011,Hepatobiliary & Pancreatic Diseases International.All rights reserved.www.hbpdint.comAims and ScopeHepatobiliary & Pancreatic Dise... Hepatobiliary & Pancreatic Diseases International (HBPD INT)Copyright 2011,Hepatobiliary & Pancreatic Diseases International.All rights reserved.www.hbpdint.comAims and ScopeHepatobiliary & Pancreatic Diseases International publishes 展开更多
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
18
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2013年第6期2-2,共1页
Hepatobiliary & Pancreatic Diseases International(HBPD INT) Copyright 2013,Hepatobiliary&Pancreatic Diseases International.All rights reserved.www.hbpdint.comAims and Scope Hepatobiliary&Pancreatic Disease... Hepatobiliary & Pancreatic Diseases International(HBPD INT) Copyright 2013,Hepatobiliary&Pancreatic Diseases International.All rights reserved.www.hbpdint.comAims and Scope Hepatobiliary&Pancreatic Diseases International publishes peer-reviewed original papers,reviews(meta-analysis,systematic review)and editorials concerned with clinical practice and research in the fields of hepatobiliary and pancreatic diseases.Papers cover the medical,surgical,radiological,pathological,biochemical,physiological and histological aspects of the subject areas under the headings 展开更多
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
19
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2009年第3期1-1,共1页
Hepatobiliary&Pancreatic Diseases International(HBPD INT)Copyright 2009, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic Di... Hepatobiliary&Pancreatic Diseases International(HBPD INT)Copyright 2009, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic Diseases International publishes peer-reviewed original papers, reviews and editorials concerned with clinical practice and research in the 展开更多
关键词 WWW Information for readers EMAIL
下载PDF
Information for Readers
20
《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2009年第4期2-2,共1页
Hepatobiliary&Pancreatic Diseases International(HBPD INT)Copyright 2009, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic Di... Hepatobiliary&Pancreatic Diseases International(HBPD INT)Copyright 2009, Hepatobiliary & Pancreatic Diseases International. All rights reserved. www.hbpdint.com Aims and Scope Hepatobiliary & Pancreatic Diseases International publishes peer-reviewed original papers, reviews and editorials concerned with clinical practice and research in 展开更多
关键词 Information for readers EMAIL
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部