取代基酞菁铜的合成与表征

首先以3,6-二羟基邻苯二甲腈和氯代正丁烷为起始反应物,在无水碳酸钾的催化作用下,经亲核取代反应,在DMF（N,N-二甲基甲酰胺）溶剂中合成了中间配体3,6-二丁氧基邻苯二腈,再以此配体和氯化亚铜为前体,采用DBU液相催化法合成了周边烷氧基取代的1,4,8,11,15,18,22,25-八丁氧基酞菁铜,经过元素分析、红外、荧光、紫外可见光谱和原子吸收表征证明,产物就是目标化合物取代基酞菁铜。     

Getting good at small talk: student-directed learning of social conversation skills

For students with autism spectrum disorders (ASD), learning social skills is an intricate but essential task to facilitate social inclusion and participation. Limited research is available on social skills interventions for adolescents with ASD and intellectual disabilities (ID). This article presents a case study that illustrates how the Self-Determined Learning Model of Instruction was used to improve self-chosen social conversation skills in a Norwegian 14-year old student with ASD and mild ID. This case study illustrates that, also for students with ASD and ID, giving them the opportunity to set personally relevant goals may improve their autonomous motivation, thereby increasing the likelihood of goal attainment.     

噪声环境中基于DTW的说话人识别

在VC++环境下,提取PLAR特征参数,基于听觉特性和语谱特性的语音增强器作为预处理器,对语音信号首先进行降噪处理,建立了基于DTW的抗噪声说话人识别系统.实验结果表明,即使在信噪比比较低的情况下,该系统都会在一定程度上提高多种噪声环境下说话人识别系统的识别性能.     

浅谈对专业化舞台灯光的认识

结合多个灯光设计案例,阐述对专业化舞台灯光的认识,包括如何推动高品质、高质量的专业化舞台灯光发展,当代灯光技术进步对灯光设计师提出的新要求、对灯光设备及灯光厂家的要求等。     

纹理谱直方图与潜在语义标引在图像检索中的应用

提出一种新的描述局域像素灰度变化的纹理谱方法,并将该方法抽取出的纹理谱直方图特征用于图像检索。实验表明该特征计算简单,检索结果较好,是一种适于图像检索的底层特征。同时将应用于文本检索领域的潜在语义标引方法用于图像检索,并提出了一种计算近似矩阵秩的方法。实验结果显示使用该方法可以分析图像中存在的隐含语义结构,并提高检索效率。     

自闭症谱系障碍儿童家长参与课题研究:影响因素和改进策略

近年来,人们越来越多地推动自闭症儿童家长有意义地参与科学研究.这种参与式研究能够更好地满足自闭症谱系障碍儿童及其家庭的评估和干预需求.从自闭症儿童自身特征、家庭因素、研究课题本身等方面分析影响家长参与课题研究的因素,基于对影响因素的综合分析,分别从家长及研究者层面提出相关对策建议,以促进家长更积极、更深入地参与课题研究...     

基于多普勒频谱图的力量项目运动员左室舒张期室壁运动研究

通过测定和比较正常人和力量项目运动员在静息和逐级递增负荷运动时,室壁多普勒频谱图上E波和A波峰值速度,研究左室后壁主动松弛和被动充盈功能的变化。结果表明：在静息状态,力量项目组房缩期心房收缩对于左室舒张充盈的贡献小于正常组;在逐级递增负荷中,力量项目组心脏舒张功能的动员表现为同时动用主动舒张储备和左房收缩储备,显示出心脏主动舒张的能力强,左房收缩储备大。     

大孔吸附树脂柱色谱法分离纯化重楼皂苷过程中的质量控制与评价

以重楼根茎粉末为原料,加热回流提取粗皂苷后,用近红外在线检测AB-8大孔吸附树脂除杂和洗脱分离的全过程,并以近红外光谱判别变量为表征手段,将分离过程分为四个阶段。分别对每个阶段收集的洗脱液进行比色和水解,通过离线的紫外光谱和高效液相色谱分析,结果显示,用70%的乙醇对大孔吸附树脂中除杂以后的重楼总皂苷进行洗脱,基本能将重楼总皂苷分为几类有效组分群。     

自闭症谱系障碍儿童社会故事干预有效性研究综述

社会故事作为一种应用于自闭症谱系障碍儿童社会能力训练的教学方法,目前得到广泛的推广与应用。本文试图从国外自闭症谱系社会故事干预的研究文献中梳理现有的社会故事干预有效性研究的开展情况,试图总结研究中存在的问题,并为今后社会故事干预的有效性研究提供思路。     

Optimal sampling frequency in recording of resistance training exercises

The purpose of this study was to analyse the raw lifting speed collected during four different resistance training exercises to assess the optimal sampling frequency. Eight physically active participants performed sets of Squat Jumps, Countermovement Jumps, Squats and Bench Presses at a maximal lifting speed. A linear encoder was used to measure the instantaneous speed at a 200 Hz sampling rate. Subsequently, the power spectrum of the signal was computed by evaluating its Discrete Fourier Transform. The sampling frequency needed to reconstruct the signals with an error of less than 0.1% was f_99.9 = 11.615 ± 2.680 Hz for the exercise exhibiting the largest bandwidth, with the absolute highest individual value being 17.467 Hz. There was no difference between sets in any of the exercises. Using the closest integer sampling frequency value (25 Hz) yielded a reconstruction of the signal up to 99.975 ± 0.025% of its total in the worst case. In conclusion, a sampling rate of 25 Hz or above is more than adequate to record raw speed data and compute power during resistance training exercises, even under the most extreme circumstances during explosive exercises. Higher sampling frequencies provide no increase in the recording precision and may instead have adverse effects on the overall data quality.