浅谈科技期刊差错率的认定——兼议《科技期刊编校质量差错率计算方法》

科技期刊差错率代表了刊物的编校质量水平,对刊物的社会评价有重要影响。目前,科技期刊差错率认定以《期刊出版质量管理规定》为政策依据。其中《期刊编校质量差错率计算方法》是针对所有期刊而制定,立足点是规范所有期刊的共性问题,它的计错标准对期刊质量控制具有重要的作用。但每种期刊各具特点,其记错应该针对性强、重点突出,具有警醒作用。科技期刊在不断实践中形成了《科技期刊编校质量差错率计算方法》,笔者对其中的一些计错标准:Ⅰ(1)、Ⅰ(3)、Ⅰ(5)、Ⅰ(7)、Ⅰ(8)、Ⅱ(10)及Ⅲ(16)等条款表述了自己的见解,提出了相应计错标准认定的修改建议,可为科技期刊编校工作的不断完善提供一定的参考。

Determining the approach speed envelope of carrier aircraft

Many factors,such as deck motion and air wave,influence the determination of the approach speed which has an important effect on landing safety. Until recently,there are no design criteria about approach speed of carrier aircraft in the current standards and available publications. Therefore,the requirements of stall margin, longitudinal acceleration ability,altitude correction and field-of-view on approach speed were researched. Based on the flight dynamics model,the flight simulations were conducted to study the effect of the response time of engine,wave off requirements,elevator efficiency and deflection rate on the approach speed. The results presented that the approach longitudinal acceleration and altitude correction ability had crucial influence on the approach speed envelope of the aircraft. The limitations of the control requirements,field- of- view requirements and gear were also given through the simulation and analysis. Based on the above results,the approach speed envelope were determined.