Community Childcare Providers’ Role in the Early Detection of Autism Spectrum Disorders

The first few years of life represent a crucial period for optimal brain development for young children. Therefore, it is important to identify children at-risk for developmental delays, including autism spectrum disorders, at the earliest age possible. An argument for utilizing community childcare providers for universal developmental screening is presented along with suggestions for assessment tool selection and a model for developmental monitoring in community childcare settings.     

Er~(3+):Y_(0.5)Gd_(0.5)VO_4晶体生长和缺陷研究

采用液相法合成了多晶材料,用高温提拉法(CZ法)生长出Er3 :Y0.5Gd0.5VO4晶体.用ICP光谱法测定晶体中Er3 离子含量为1.25 at%,分凝系数为1.06.采用热磷酸腐蚀晶片,在偏光显微镜下对晶体的(010)、(001)面上的缺陷进行了观察,可明显观察到位错线、生长层和包裹物.由此得出,Er3 :Y0.5Gd0.5VO4晶体的主要缺陷是位错、生长层和包裹物等.     

The Outcome of a Social Cognitive Training for Mainstream Adolescents with Social Communication Deficits in a Chinese Community

The use of cognitive-based strategies for improving social communication behaviours for individuals who have solid language and cognition is an important question. This study investigated the outcome of teaching Social Thinking^®, a framework based in social-cognition, to Chinese adolescents with social communication deficits. Thirty-nine students (33 with Autism Spectrum Disorders and six without), ranging in age from 12 to 15 years with social communication deficits, participated in a 12-week intervention. Students’ pre- and post-intervention social behaviours were measured by six aspects of the Social Thinking-ILAUGH Scale involving 115 familiar raters. Students showed significant improvement in all the six subscales of the Social Thinking-ILAUGH except humour after training. Agreements on ratings among parents and school personnel were satisfactory. A framework based in social cognitive strategies, with appropriate linguistic and cultural adaptations, appears to be a promising tool for Chinese adolescents with social learning issues. Social behaviours improved across school and home settings as noted by groups of raters familiar with the students.     

两等同双能级原子与三模腔场任意多光子共振相互作用辐射谱的一般特征

本文研究了两个偶极——偶极力关联的等同双能级原子与三模腔场间任意多光于共振相互作用的辐射谱。对三模腔场分别处于不同数态:即三模均为真空场、三模均为强场、一模为真空场两模为强场以及两模为真空场一模为强场时辐射谱的结构特征及物理特性进行了详细分析,从而揭示出“三模腔场——两原子系统”的多光子辐射谱的一般特征。     

非线性光学有机分子吸收光谱的测定及跃迁偶极矩的计算

通过测定两种具有D—π—D结构的有机分子的吸收谱,并根据三能级模型对其跃迁偶极矩进行了计算.并从结构-性质的关系对其高阶非线性光学效应进行了预测,认为这两种分子将会具有较大双光子吸收截面.     

基于调制重叠双正交变换的扩频通信非正交型窄带干扰抑制

Traditional lapped transform domain excision techniques obtain good performance at the expense of increased processing delay. Extension of transform domain filtering techniques to the lapped biorthogonal transform domain can help solve the problem. By incorporating biorthogonality into the lapped transforms, more flexibility is obtained in the design of windows. Thus transform bases with better stopband attenuation can be generated by designing windows, but not by increasing the overlapping factor. In this paper, a new modulated lapped biorthogonal transform (MLBT) with optimized windows is introduced for efficient compression of multi-tone interfering signal energy. The bit error rate (BER) performance of the receiver employing the proposed MLBT excision technique is analyzed and compared with that of the lapped transform domain excision-based receivers. Simulation results demonstrate the improved performance and increased robustness of the proposed technique.     

电视高频信号源的混合设计与应用

本文简述了电视高频信号与电视标准测试信号的混合使用，通过工程实践，分析并比较两种信号源的频谱分布结构情况，为两种信号的合理混合应用提出可行的设计方案。     

基于System View的扩频通信中同步的仿真

PN码序列的同步是扩频系统所持有的,也是扩频技术中的难点。本文根据扩频通信中同步的基本原理,利用滑动相关法实现PN序列码的同步,采用Svstem View软件对其进行仿真验证。     

^11B^35Cl和SiC的势能函数

采用从头计算的方法研究了^11B^35Cl和SiC的结构和势能函数。对基态的^11B^35Cl,采用的是CISD／6—311＋G＊的方法。对基态的SiC分子采用的是B3LYP／6—311＋＋G＊＊的方法。根据CISD方法（对^11B^35Cl）和B3LYP方法（对SiC）的计算结果,采用最小二乘法拟舍出了Murrell-Sorbie势能函数的参数。并得出了力常数和光谱数据。     

运动粒子的散射特征

本从Lorents变换出发，导出了运动粒子的散射截面，过渡到低速时结果与有关献一致；最后应用所得结果研究了布朗粒子的散射截面的时间频谱。