对两种"安培"定义等效性的探讨

本文对电磁学教材中,有关国际单位制中的基本单位"安培"的两种定义进行了对比和讨论,指出了其中一种定义存在不妥之处的原因。     

Imaging: A Tool for Data Reduction

This article illustrates the use of high-resolution color graphic images obtained from raster terminals to reduce an immense amount of data into a few meaningful time series. The steps that were taken to achieve this data reduction and their appropriate images are given. The time series were analyzed using Box and Jenkins time series methods (see also McCleary and Hay 1980), and the results are discussed.     

It’s about the process,not the result: An fMRI approach to explore the encoding of explicit and implicit price information

This research examines the neurophysiological correlates of consumers’ price memory processes. We focus on the explicit and implicit dimensions of consumers’ price knowledge and use an experimental functional Magnetic Resonance Imaging (fMRI) study to assess how the encoding of task-dependent price memory affects the choice process and neural activation. The findings of our study add to the field of consumer neuroscience by demonstrating how neural correlates of explicit and implicit task-dependent price memory can shed light on processes that guide consumer decision-making. Over the course of our experiment we found that consumers did not always make consistent decisions, but that their decisions were influenced by explicit components of price memory. Implicit price memory components seem to have a more supportive role in the decision-making process. In summary, we found that price memory is a dynamic construct that is influenced by unconscious and neurophysiological processes, and we conclude that a neurophysiological perspective can add value for consumer and marketing research.     

呼吸是歌唱的生命

“呼吸是歌唱的基础,气息是歌唱的动力。”对呼吸方法的正确领悟是歌唱者重要的基本功,呼吸方法掌握得好坏,直接影响歌唱发声质量。在整个歌唱训练中,歌唱器官的发声基本训练也很重要,如喉头的稳定就离不开呼吸的支撑力,想得到丰富而又美的共鸣,更离不开深呼吸的支撑,只有恰当用好呼吸,自如地使用呼吸,声音才能松驰、表情才能自如,才能随心所欲地表达歌曲的思想感情。     

Adaptive weights smoothing with applications to image restoration

We propose a new method of nonparametric estimation which is based on locally constant smoothing with an adaptive choice of weights for every pair of data points. Some theoretical properties of the procedure are investigated. Then we demonstrate the performance of the method on some simulated univariate and bivariate examples and compare it with other nonparametric methods. Finally we discuss applications of this procedure to magnetic resonance and satellite imaging.     

论《二十年目睹之怪现状》的道德批判

把《二十年目睹之怪现状》看做是《新小说》杂志的一部分,以民族主义想像入手,并将它与其他＂新小说＂作互文对读后,认为在小说结构上渗透了吴趼人的道德关怀,以及在对伦理体系崩溃的叙述中隐含了一定的道德批判;并且指出了小说的遁世倾向,这是因为作者暂时觅寻不到正路。     

护理干预对冠状动脉CT检查结果的影响分析

目的：评价护理干预对冠状动脉CTA（computed tomography angiography）检查患者心理状况、检查成功率、图像质量的影响。方法：选取我院2013年1月至2014年12月行冠脉CTA检查的500例患者,随机分为研究组（n=250）和对照组（n=250）,对照组仅进行常规护理,研究组则同时进行心理护理、心室率控制、呼吸屏气训练。结果：487例患者最终完成冠脉CT检查,其中研究组中2例、对照组中11例因严重焦虑恐惧及屏气不佳终止检查。研究组焦虑症状、心率、血压变化明显低于对照组,检查的成功率及图像质量显著提高（P<0.05）。结论：护理干预可减小冠脉CT检查患者的心理应激,提高检查的成功率及图像质量。     

基于MRI图像的主动脉弓变形测量方法的研究

目的:准确测量主动脉弓的变形和位移,以便于主动脉弓血流动力学的仿真计算以及主动脉弓疾病的形态学诊断的进行。方法:本文首先基于主动轮廓模型(GVFSnakes模型)把MRI图像中的主动脉部分与胸腔分割开来,之后对人主动脉弓一个心动周期内的多幅MRI图像进行分析,建立主动脉弓运动的动态模型,并通过相关软件对主动脉弓的变形情况进行测量。结果:获得了一个行动周期内升主动脉根部,升主动脉中部,头臂动脉分支前,左锁骨下动脉分支后以及降主动脉中部等五个典型截面的变形量。结论:升主动脉中段的边界变形幅度较大,其他部分截面面积变化相对较平稳。通过对主动脉弓MRI图像的分析研究,可以准确地获取到血管边界的位移和变形信息。     

音乐声波对人体作用机理探讨——兼谈音乐逍遥气功的实践

本文介绍了作者在音乐与气功相结合方面所作的创造性实践和研究。在特制音乐声波激发下,能很收快到传统气功的功效,使练功者达到强身治病的目的。实践证明音乐逍遥气功对多种慢性病有很好疗效。文章从物理学、生物物理学的角度,以系统论的方法对音乐逍遥气功的机理进行探讨。认为这是自觉利用各种形式、以一定规律动态变化的能量流的一种新的尝试。     

热印头发热元件阻值一致性的差值测试法

从热印头的结构与工作原理出发，分析了热印头发热元件的特点，提出了发热元件阻值的测试方法，给出了测量结果．