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通过多媒体教学已经成为一种时代发展的需求,传统的板刷式教学模式正在逐步被淘汰,近年来,计算机的迅猛发展,给带教护士的教学带来了冲击,随着多媒体进入课堂,由于它以图文并茂、动静皆宜、声像俱佳的表现形式,将课堂教学引入全新的模式,深受年轻带教护士和学生的欢迎。事物的发展要一分为二,多媒体教学既有优越性也有局限性。只有做到多媒体与教学科学有机地结合,才能发挥其最大效能。在护理教学中,往往参杂着好多案例和实物展示,通过口头讲述,护生往往听不明白,再加上医院条件限制,科室没有黑板,给教学带来了困难,多媒体的出现,改变了这一现状。 相似文献
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Improved Performance of Phthalocyanine Derivative Field-Effect Transistors by Inserting a Para-Quarterphenyl as the Inducing Layer 下载免费PDF全文
We investigate the phthalocyanine derivative organic field-effect transistors (OFETs) using a novel para - quaterphenyl (p-4p) as the inducing layer. Compared to the devices without the p-4p inducing layer, the performances of p-type (copper phthalocyanine) and n-type (fluorinated copper phthaloeyanine) OFETs with optimized thickness of p-4p thin films are greatly enhanced. Both the field-effect mobility and the on/off ratio of the two-type devices are improved by one order of magnitude compared to those of the control devices. This re- markable improvement is attributed to the introduction of p-4p, which can form a highly oriented and continuous phthalocyanine derivative film with the molecular π - π stack direction parallel to the substrate. 相似文献
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《老肯牌LK/CXD型床单位臭氧消毒机》被广泛应用在病房消毒,尤其在床单位、终末消毒方面。本文就该消毒机的使用及维护作以简单介绍。 相似文献
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