轿车摆臂设计载荷谱的确定

通过实测轿车摆臂试车场道路载荷谱,对摆臂目标测点载荷进行采集．在原有载荷谱统计分析原理的基础上,依据结构的低载强化特性,确定出了摆臂结构的八级载荷谱．为进一步计算不同效果载荷（强化、损伤、无效载荷）的概率、研究零件静强度和疲劳强度的增长规律、总结可靠性设计中的载荷利用方法提供一定理论基础．     

加工表面多重分形谱权重因子的估算方法

多重分形谱能精细全面地描述工件表面图像特征,而采用配分的方法获得多重分形谱,并对具体的算法进行了描述,将多重分形谱和奇异指数对权重因子求取一阶导数,确定了权重因子的取值范围。     

基于EMD和HHT的轧机扭振瞬态冲击信号时频分析研究

为解决轧机扭振非平稳瞬态冲击信号的瞬态时频分析难题,提出了基于EMD和川bert—Huang变换的瞬态振动信号时频分析方法．利用EMD分解提取信号的固有模态函数OMF）,再结合Hilbert变换,求解瞬时频率,进而得到信号的Hilbert—Huang时频谱及边际谱,从而提取扭振信号瞬态特征．通过仿真实验验证了该方法的可靠性,通过轧机在咬钢抛钢时实测瞬态信号的分析,表明了该方法的可行性．     

基于ISC、SCSN与CRN地震记录的地方时统计特征与频谱分析

首先对ISC、SCSN与CRN地震目录进行地方时转换,并进行序列统计,建立了地方时地震时间频度分布,然后对地震地方时序列做了频谱分析,以提取地震序列中的特征周期成分.地方时统计结果显示:(1)地震频度在地方时9时和19时附近最低,0时和13时附近最高;(2)存在以12h和24h为主的周期;(3)较大地震和小地震有不同的活动规律.频谱分析的结果表明,ISC、SCSN与CRN地震地方时序列除了存在12h、24h等特征周期对应日潮和半日潮之外,还存在117a、1a与175a等的周期,分别对应太阳黑子的活动周期、地球公转及接近对应月球升交点的回归年.     

四阶线性微分方程组的离散谱估计

考虑四阶线性微分方程组的离散谱估计,利用矩阵运算,分部积分和不等式估计等方法与技巧,得到了用前n个特征值来估计第n 1个特征值的上界的不等式,其估计系数与区间的几何度量无关,其结果在物理和力学等领域有着广泛的应用。     

‘I'm ready for a new chapter’: The voices of young people with autism spectrum disorder in transition to post-16 education and employment

This study explores the views and experiences of 12 young people with autism spectrum disorder (ASD) in transition to post-16 education and employment, in light of the changes introduced by the new special educational needs and disability (SEND) legislation in England. The extension of provision until the age of 25, and the introduction of person-centred education, health and care (EHC) plans, have given a significant place to the views of young people with SEND and their families. The views, wishes and aspirations of young people must be captured in the newly developed plans, reflecting the statutory requirement for local authorities to systematically record these in a biopsychosocial way, focusing on participation and well-being. Twelve semi-structured interviews were conducted with young people with ASD attending specialist settings or receiving specialist support under the new EHC plans. These were analysed inductively, through thematic analysis. The findings suggest that at the time of transition, young people with ASD want to become increasingly more independent, present ambivalent feelings about their future and acknowledge the relevance of support systems in their lives. Implications for practice and future research are discussed, in light of the new English policy context.     

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。     

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.     

反向传输中高阶色散项的交叉相位调制不稳定性分析

对在光纤中反向传输的两束光,以包含了三、四阶色散项的耦合非线性薛定谔方程为基础,主要研究高阶色散对交叉相位调制不稳定性的影响.三阶色散对调制不稳定性不起作用,但反向传输光的群速度却对不稳定性的发生有影响;当满足一定条件时,由于四阶色散的影响,在光纤的反常色散区,交叉相位调制不稳定性发生在两个频谱区.在正常色散区,四阶色散产生了一个新的交叉相位调制不稳定性频谱区;反常色散区远离零点的频谱区的增益谱比正常色散区的增益谱更靠近零点,且两个频谱区的范围有准分离的对称关系.     

Educating students with FASD: linking policy,research and practice

Fetal alcohol spectrum disorder (FASD ) is a prevalent neurodevelopmental disability with significant implications for learning and behaviour. International research suggests that the prevalence of FASD in school‐aged children is 2.3–6.3%. In this paper, we address the questions: (1) what is FASD ; (2) what is the prevalence of FASD in schools; (3) what is the impact of FASD ; and (4) why develop special FASD education strategies and programmes? We summarise the 18‐year history of W innipeg S chool D ivision's development of its FASD P rogramme of services, describe the specialised FASD classrooms and then present the results from a consensus‐generating workshop comprised of 36 FASD education professionals, with over 209 years of collective FASD education programme experience, who were asked to identify and reach consensus on best strategies and lessons learned in FASD education programmes. We then suggest that effectively educating children with FASD is critical to get right if positive educational outcomes are to be realised.