人膈肌细胞超微结构的ODO冷冻断裂扫描电镜观察

借助ODO冷冻断裂扫描电镜制样技术,对人胎膈肌细胞进行研究,获得人体横纹肌细胞、肌原纤维、肌节以及暗带(A带)、明带(I带)和H带的扫描电镜资料。     

激光功率密度分布对表面温升的影响

分析了激光扫描时激光功率密度分布状况不同对表面温升的影响。研究计算在扫描工艺参数不变时,因激光功率密度分布的非对称性引起往复扫描结果的差异,其分析结果对实际应用具有重要意义。     

运动心脏结构与功能的发生与转归

为了进一步探讨运动心脏结构与功能的发生、转归及其与病理心脏的本质差异,本通过动物实验模拟运动心脏,观察了经过１２周耐力训练及完全停止运动训练８周后心脏重量和超微结构的变化,应用激光扫描共聚焦显微镜与新一代钙荧光指示剂Ｆｌｕｏ－３／ＡＭ负载方法对心肌活动细胞内具有生物活性的游离钙的动态变化进行了研究。结果显示：经过１２周耐力训练后,心肌活细胞内游离钙浓度静息值无显性改变,心肌心缩时其游离钙浓度峰     

顺时观察模式下指宾状语句句式意义分析

文章具体考察了现实事件句中的结果宾语句、非事件句中的静态场景句、非现实事件中的命令句、想象句等句子中的状态形容词的语序及其与观察模式之间的互动关系,把语言表层所体现出的顺时观察与逆时观察模式统一起来,并阐明：从认知运作上来说,这些句式意义实际上是受顺时观察模式所规约的。这一观点可以将前人关于这类现象的语用动机、篇章功能及信息功能、主观性的差异及句式中的形容词、动词语义特征分析等方面的研究结论进行统一解释,对于分析其他语序问题也具有启发意义。     

成像激光雷达研究进展

成像激光雷达在军事和国民经济中都有广泛的应用。文章分析了CO2成像激光雷达、半导体成像激光雷达和二极管泵浦固体成像激光雷达的现状与发展。     

To Be Active Readers-A Suggested Way to Teach College English Reading

Reading plays a very big role in the college English course in China.Teaching reading in a college English classroom aims at helping students develop the skills they need to read more effectively.A way is suggested to teach reading in a college English class.Through this way,students become active readers who predict before reading,scan for specific information,confirm or reject their predictions while reading,answering comprehension questions in their own words,etc.Their reading skills are sharpened in such a reading class.     

Numerical controlled two optical paths CO2 laser die-cutting technology

A CO2 laser die-cutting system, which does not need die board any more, is a new technique for manufac-turing packing box. Two optical paths, the galvanometer scanning system and the flying optical system, are used to satisfy different processing needs. The scanning system is composed of galvanometer scanning mirrors and F-θ lens. And the flying optical system is driven by two servo motors. This paper presents the software and hardware design of the laser die-cutting system, the difference between the two optical paths, as well as the relationship among the cutting speed, thickness of wrapping paper and laser power. The cutting speed and thickness of wrapping paper are linearly increased by the incremental laser power, while the cutting speed is hyperbolically decreased by the incremental thickness of wrapping paper when the laser power is constant. The amount of incision is reduced by 20% and the processing time by 40% when tested by a low power RF CO2 laser die-cutting system using the optimized program. This tech- nique is also used for the reference of other rapid laser processing systems.     

建筑物日照分析测量研究

简述建筑物日照分析测量时代要求和技术方法现状,介绍了三维激光扫描技术的工作原理和发展,提出三维激光扫描技术与日照分析测量相结合的技术话题。     

刘震云与乡土审视

在刘震云的作品中,很大一部分是以＂故乡＂为背景,进行乡土审视。出身于乡土的他对＂故乡＂审视有两种形态,一种是对有着重重糟粕积淀的乡土现实的批判;一种是对乡土古朴的道德情操和生存方式流露出丝丝温情。作为一位有着深刻历史责任感的作家,其批判的力度远远大于温情。     

Polar or nonpolar? That is not the question for perovskite solar cells

Perovskite solar cells (PSC) are promising next generation photovoltaic technologies, and there is considerable interest in the role of possible polarization of organic-inorganic halide perovskites (OIHPs) in photovoltaic conversion. The polarity of OIHPs is still hotly debated, however. In this review, we examine recent literature on the polarity of OIHPs from both theoretical and experimental points of view, and argue that they can be both polar and nonpolar, depending on composition, processing and environment. Implications of OIHP polarity to photovoltaic conversion are also discussed, and new insights gained through research efforts. In the future, integration of a local scanning probe with global macroscopic measurements in situ will provide invaluable microscopic insight into the intriguing macroscopic phenomena, while synchrotron diffractions and scanning transmission electron microscopy on more stable samples may ultimately settle the debate.