清代谱序中关于新序和旧序的分析

谱序的发展由来已久,清代是谱序发展比较完善的时期,谱序的篇数庞大。随着时间的久远,新序和旧序的对比也比较明显。本文就新序和旧序内容上的不同,对其出现的原因和对应谱序的作用作了浅显的分析。     

顿顶螺旋藻完整藻胆体与解离藻胆体光谱特性的比较研究

对钝项螺旋藻完整藻胆体与解离藻胆体吸收光谱进行了比较研究.随着藻胆体的逐渐解离,其吸收光谱表现出如下变化特点:在紫外光区,吸收峰始终位于355nm,尖形峰逐渐变成钝形峰;在红光区,都有很强的吸收,吸收峰呈平顶状,其半带宽逐渐变小;紫外光区与红光区相对吸收强度的比值逐渐变小;四级导数吸收光谱的小峰数目越来越少.室温荧光发射光谱表明,藻胆体在低于0.9mol/L的磷酸缓冲液中变得不稳定,并开始逐渐解离,解离的藻胆体与完整的藻胆体相比,其荧光发射峰波长逐渐变短.     

基于神经网络的认知无线电合作频谱感知

认知无线电是一种可用于有效缓解当前频谱资源紧张的技术，而频谱感知是认知无线电的前提。针对低信噪比情况下频谱感知性能差的问题，提出一种将信号高阶统计量、协方差矩阵特征值与神经网络相结合的合作频谱感知算法。该算法考虑到认知用户与授权用户的信道衰落情况，利用神经网络较强的多分类能力，将最大-最小特征值之比、平均-最小特征值之比以及高阶统计量作为特征参数，通过神经网络实现合作频谱感知。仿真结果表明，该算法不仅在低信噪比情况下较其他算法具有更高的频谱检测率，而且对频谱中信号的调制类型也有较高的识别率。     

肺动脉高压发病机制及有氧运动干预对其改善的分子机制研究进展

肺动脉高压(pulmonary arterial hypertension,PAH)是一类以肺动脉渐进性闭塞导致肺血管阻力逐渐升高继而诱发右心室衰竭的一种恶性肺血管疾病。PAH病理发生、发展的机制包括炎症反应诱发的内质网应激(endoplasmic reticulum stress,ERS),继而促使血管平滑肌细胞过度增殖和迁移;以及线粒体自噬相关蛋白PINK1和Parkin以及LC3的表达增加,使血管平滑肌呈现抗凋亡表型,并伴随有氧氧化功能损伤,无氧酵解依赖性增加等问题。PAH进一步发展会诱发多种并发症,包括低氧血症、肺纤维化以及右心肥大,可直接引起肺动脉压增加,继而增加心脏压力导致心力衰竭,这是病理发展的主要方向。作为可能治疗PAH的手段之一,有氧运动可从调控ERS、线粒体自噬、改善机体代谢3个方面抑制PAH病理进程。研究综述了近年来关于PAH发生、发展的分子机制的研究进展,进一步论述了有氧运动对PAH改善的分子机制。     

Young people with high‐functioning autism and Asperger's syndrome planning for and anticipating the move to college: what supports a positive transition?

For many young people in England, the move into continuing education involves a transfer from the school where they were educated to a further education college. For those with high‐functioning autism or Asperger's syndrome, this can be a challenging process. Past research has demonstrated some of the problems that these young people can encounter. This article by Wendy Mitchell and Bryony Beresford, both based in the Social Policy Research Unit at the University of York, adds to the evidence base by describing how best to support these young people, focusing specifically on ‘young person endorsed’ practice. Data are gleaned from qualitative interviews with 18 young people with high‐functioning autism/Asperger's syndrome. Findings reveal that young people welcomed the involvement of practitioners; however, specific forms of help and knowledge were particularly valued. In addition, it was parents, as opposed to professionals, who typically emerged as the most significant and valued source of support. Implications for practice are discussed, including the support needs of parents.     

一类宽平稳量子随机过程及实例分析

定义了"宽平稳量子随机过程"的概念,获得了其谱分解定理.辅以统计物理学中的实例为基础.     

浅谈扩频通信在无线局域网中的应用

本文阐述扩频通信的工作原理及目前无线局域网的特点和主要传输方式,并就扩频通信的四种工作方式、扩频技术的特点和扩频技术在无线局域网中的应用前景等作了介绍     

From research to reality: Australian evidence-based practice in autism education

Many teachers are sporadic in using evidence-based practice (EBP) concerning students with autism spectrum disorder (ASD). Numerous reasons have been posited for this. However, no single study has worked to understand the relative importance of identified criteria in the EBP decision-making processes of teachers. Through the development of a new survey tool, the Evidence-Based Practice Innovation Survey (EBPIAS), an exploration of the decision-making process of Australian teachers in their adoption and cessation of EBP was undertaken. Teachers rated the perception that an EBP would meet the needs of their students as the most important criteria in determining their use of EBP. Conversely, the judgement that an EBP did not meet the needs of their student was the most important criteria in their decision to cease use. In comparing the relevant importance of identified criteria, teachers rated the perception of training as the second-lowest consideration in their decision to adopt and cease using EBP. Consequently, there may need to be greater promotion of, or information concerning, the training required by teachers for effective implementation supporting a more balanced and holistic approach in assessing criteria impacting the adoption of EBP by teachers in the first instance, potentially lowering cessation rates.     

The effects of function-based communication intervention for a student with emotional disturbance in a general education setting

Research has shown that most children with emotional disturbance (ED) are struggling to use communication skills and they may tend to use inappropriate behaviours as a form of communication to disclose their needs. A function-based communication intervention might be an effective approach to decrease inappropriate behaviours of children with ED. The purpose of this single-case multiple baseline reversal design (ABAB) study was to examine the effectiveness of the function-based communication intervention for on-task and disruptive behaviours of an 8-year-old student with ED. Functional behavioural assessment (FBA) was conducted and based on the findings of FBA, a colour-coded communication system, was implemented during reading and math classes. The findings indicated that function-based communication intervention was effective in increasing on-task as well as decreasing disruptive behaviours. Furthermore, the function-based communication intervention improved communication between the teacher and the student that resulted in decreasing disruptive behaviours in a general classroom setting. The generalisability of the findings due to the limited number of participants was an important limitation for this study. Future directions, as well as implications for practices, are discussed.