基于缓存策略的Java卡字节码校验

作为一种不可靠的可下载Java程序， Java卡的字节码校验是安全的嵌入式系统所不可缺少的一个部分。由于Java卡本身的空间和运算器的限制，传统的字节码校验并不可取。采用非易失性存储器作为主存， RAM中的一部分空间作为缓存器，并且给出一种相应的Cache调度策略算法，尝试实现一种在卡上的Java卡的字节码校验算法，并且证明了该算法具有较好的可移植性和实现性。     

基于蓝牙的多机通信的实现及其应用

本文提出了一种基于蓝牙通信协议的PC机监控多台单片机控制系统的多机通信方案。针对蓝牙芯片PTR2000,对多机通信的设计方法、系统的组成原理进行了阐述;对上位机蓝牙接口电路、单片机蓝牙接口电路的实现过程进行了详细的说明;对蓝牙通信协议,特别是大数据传输协议进行了设计。以汉字传输过程为例,提出了一种提取汉字的点阵算法,对上下位机之间进行汉字传输的软件设计与实现过程进行了说明,对实验结果进行了分析。实验结果表明,上述通信方案是成功的和有效的。     

Immunogenetics of the A-E alloantigen complex

OBJECTIVE: To examine noradrenergic (NA) function in children with attention-deficit hyperactivity disorder (ADHD) by replicating and expanding upon a previous finding that ADHD children with and without reading disabilities (RD) differ in plasma levels of the NA metabolite 3-methoxy-4-hydroxyphenylglycol (MHPG). METHOD: Plasma levels of MHPG were compared in ADHD children who were subdivided on the basis of the presence or absence of RD. Subsequently, this replication sample was combined with a previously studied sample to further explore the relationship between plasma MHPG levels and measures of cognitive function in children with ADHD. RESULTS: Plasma levels of MHPG were significantly lower in ADHD children without RD, compared with those with RD, replicating a published finding. Analyses in the combined sample indicated that, among children with ADHD, plasma MHPG levels were inversely associated with measures of academic achievement and verbal processing, but not parent or teacher ratings of behavior or continuous performance test measures of attention and impulsivity. CONCLUSIONS: These data indicate that children with ADHD are not homogeneous with regard to NA function and that neurochemical variation is closely associated with differences in clinical characteristics of the children.