Wave speed during maximal expiratory flow and phase velocity from forced oscillations

We review currently known results concerning the estimation of an 'immune' or 'cured' proportion, and testing for the presence of immunes, in censored survival data, suggesting that a firm theoretical foundation now exists for analysis. Two types of estimators, parametric and non-parametric, are discussed and compared with respect to their theoretical properties, and, by simulation, with respect to their small sample behaviour. Both estimators have advantages and drawbacks, but together provide powerful tools for the perceptive analysis of survival data with, or even without, immune individuals.     

使用无线电集群通信系统应扬长避短

本文先对集群通信系统的概念作一些阐述,包括其含义、特点和一些主要功能。对集群方式的三种形式——消息集群、传输集群和准传输集群作了简要介绍。对集群系统的两种控制方式——专用控制信道方式和非专用控制信道方式也作了简单分析。在此基础上,对集群通信系统的正确使用提出了看法,对蜂窝和集群两个系统作了简要比较。     

玉米机收正当时

立秋已过,玉米收获的黄金季节就要到来,广大农民、农机户特别是农机推广部门应当不失时机地大力推广玉米收获机械,为实现玉米生产机械化做出新的贡献.     

严格按照中央要求继续推进节能减排工作——对吴江市印染行业近几年节能减排工作的调查

吴江市印染行业是耗能、排污大户,在当前创建资源节约型、环境友好型社会的热潮中首当其冲。吴江市丝绸协会曾于2003年6月对该行业的节能减排工作做过调研,近几年在这方面有哪些建树?根据中央对节能减排的更高要求,下一步棋应该怎么走?这是摆在大家面前的重要课题。为此,协会近期又作了调研。