编码在通信中的应用

本文论述了编码技术在通信中的应用,讨论了离散信号的编码过程中的作用,以及编码技术的保密用途和纠错功能。     

电解水实验

主要探讨电解水实验时误差产生的原因，并根据实验具体情况选择合适的实验条件，以保证实验成功，从而准确说明水的组成。     

Frame loss error concealment for SVC

INTRODUCTION Real-time transmission of video data in network environments, such as wireless and Internet, is a challenging task, as it requires coding efficiency, network friendliness and error robustness. Scalability is a possible solution for network adaptive applica- tions. The Scalable Extension of H.264/AVC (SVC) (JVT of ISO/IEC MPEG & ITU-T VCEG, 2005b) aims at achieving both high compression performance and adaptivity for video delivery over heterogeneous networks. SVC…     

Video quality based link adaptation for low latency video transmission over WLANs

INTRODUCTION Low latency video transmission is very de manding in terms of the performance of all layers i the protocol stack. Over the last decade, research ha focused on enhancements of each individual laye without considering cross-layer interactions. Adapt ing video coding to the channel/network condition and technologies (and vice versa) (Girod et al., 2002 via the cross-layer exchange of information has onl recently been investigated. van der Schaar et al.(200 developed a cross-laye…     

Factors Affecting the Ability to Detect Spreadsheet Errors

The extensive computational and formatting capabilities of today's spreadsheets enable users to create sophisticated analytical models with professionally formatted outputs. But good‐looking reports can mask a host of input errors, formula mistakes, and computational problems. This article examines the subject of spreadsheet error detection in detail and describes an experiment designed to identify those factors influencing the error‐detection capabilities of a sample of spreadsheet users.     

Unequal Division of Type I Risk in Statistical Inferences

Introductory statistics texts give extensive coverage to two‐sided inferences in hypothesis testing, interval estimation, and one‐sided hypothesis tests. Very few discuss the possibility of one‐sided interval estimation at all. Even fewer do so in any detail. Two of the business statistics texts we reviewed mentioned the possibility of dividing the risk of a type I error unequally between the tails for a two‐sided confidence interval. None of the textbooks that were reviewed even considered the possibility of unequal tails for two‐sided hypothesis tests. In this paper, we propose that statistics courses and texts should cover both one‐sided tests and confidence intervals. Furthermore, we propose that coverage, at least in two semesters and advanced courses, should also be given to unequal division of the nominal risk of a type I error for both tests and confidence intervals. Examples are provided for both situations.     

涡旋压缩机动盘型线的算法

简要介绍了涡旋压缩机的工作原理及其动盘型线加工的计算方法和误差分析。     

由错误分析理论探讨书面错误对待

本以错误分析理论为根据，探讨了外语教学中的书面错误对待问题以及纠错策略，并且阐述了错误对待在教学中的启示。     

纠错式教学法在护理操作教学中的应用

从浙江省永康卫生学校2009年级护理专业中随机抽取两个平行班,一个班作为实验组（n=59）,另一个班作为参照组（n=58）.实验组采用纠错式教学法,对照组采用传统教学法,通过考评获得本教学方法的相关信息.结果显示,实验组综合考评成绩明显高于对照组,差异有统计学意义（P〈0.01）.说明纠错式教学法可增强护生的学习信心,增加自我纠错的能力,提高学生的护理操作能力.     

评分趋中性现象的初步分析

各类大型考试中的主观题由于题目要求灵活和考生答案多种多样,因此很难根据评分标准确保评分的准确性。利用网上评卷可以在某种程度上解决评分的误差问题,但仍发现存在着评分趋中性现象。本文通过对评分趋中性现象成因的分析,提出技术上进一步补充引入指标参数、不断完善评卷质量评价体系、系统中借鉴并设立评卷"外卡"机制等对策和措施,从而保证"个性化"评分的正常显现,减少"保险分",加强对评卷人员的人文关怀,充分发挥评卷人员的主观能动性,避免或减少趋中现象的发生,最终达到提高评卷准确性(有效度)的目的。