基于k-分辨-FB级数展开的多分量LFM信号分离

针对傅里叶-贝塞尔变换(FBT)难以估计和有效分离多分量LFM信号的问题,提出了一种k分辨-FB(k-FB)级数展开结合dechirp的信号分离与估计算法。在FB级数的基础上引入k分辨参数,通过理论推导,得出了信号频率与级数的关系,证明了参数估计精度与k取值正相关。通过解线频调和k-FB级数计算,实现了信号分离重构和参数估计。在不同信噪比、信号功率比和k分辨条件下对信号的分离精度进行了仿真研究,并与基于分数阶傅里叶变换(FrFT)的方法进行了对比。仿真结果验证了算法的有效性。     

液压支架压力变送器的电路设计

分析了液压支架的压力特性并提出对压力变送器的技术要求，阐述了压力传感器的选择和外围电路的设计，对压力变送器的信号调理电路进行了仿真分析。     

健身球训练促进钢琴学习和演奏

钢琴学习和演奏需要勤奋的练习,练习过程不可避免产生疲劳.寻求一种既有乐趣的健身锻炼方法,在身位、协调、柔韧、灵活、控制等多方面达到良好的效果,又可以有效解除钢琴练习的疲劳,为提高钢琴训练和演奏水平提供良好的身体和心理保障.在这方面,健身球练习无疑是最佳选择.     

IUD频繁脱落者放置吉妮IUD186例临床观察

目的：寻找宫内节育器频繁脱落者，采用吉妮宫内节育器宫内独特的固定方式，以解决宫内节育器反复落脱问题。方法：受术妇女在月经干净3～7d内放置，用专用放置器将丝线小结植入子宫底肌层10mm，使吉妮悬吊于宫腔内，剪除多余尾丝，放置后于1、3、6、12月跟踪随访。结果：放置186例，1例放置后首次月经期脱落，1例为放置6个月带器妊娠，1例因疼痛、出血，放置后3个月取出。其余跟踪随访1年无异常，1年续用率为98．39％。结论：吉妮宫内节育器是安全、高效、副作用少的新型宫内节育器，特别适用于宫内节育器频繁脱落者使用，值得临床推广。     

关于人体经络的一个试探性观点

在考察针刺穴位治疗作用的基础上，根据现有的实验事实，将人体经络的观念和经改进后的神经-内分泌-免疫系统的观念统一起来，提出人体经络是具有敏感节点和功能连接的神经-内分泌-免疫网络的假说。人体经络的复杂网络不仅是遍及全身的系统，而且可以通过敏感节点及其功能连接对身体起调控作用。     

义和团劫运观的历史内涵

封建蒙昧性是义和团反帝爱国运动的突出特点，而劫运观是赋予义和团运动浓厚的封建蒙昧性色调的最主要的宗教信念。这一宗教信念以其富有乡土文化气息的独特义理，成为十九世纪末北方乡土民众进行民族自卫斗争的核心思想武器。透视这一思想武器的历史内涵，有助于我们进一步了解十九世纪末以农民为主体的中国乡土百姓投身于民族救亡斗争的精神诉求，以及他们实践其精神诉求的悲剧性方式。     

基于计算机和课堂的英语教学模式的教师角色研究

本文按照《大学英语课程教学要求》，简要分析了基于计算机和课堂的英语教学模式，提出了在这种模式下大学英语教师的角色定位，以更好的发挥学生的主体作用和教师的主导作用。     

语言模因论视角下的不可译现象研究

模因视角下对待不可译有两种处理办法：一是产生“基因型模因”，基本上采用直译或异化策略再进行补偿的办法，保证信息不失真，实现“相同信息异型传播”；二是产生“表现型模因”，在原模因的基础上产生较大的变异，采用意译或归化的翻译策略，实现“不同信息同型传播”。     

Homology Priority Task Scheduling in μC/OS-Ⅱ Real-Time Kernel

μC/OS-Ⅱ is an open source real-time kernel adopting priority preemptive schedule strategy. Aiming at the problem of μC/OS-Ⅱ failing to support homology priority tasks scheduling, an approach for solution is proposed. The basic idea is adding round-robin scheduling strategy in its original scheduler in order to schedule homology priority tasks through time slice roundrobin. Implementation approach is given in detail. Firstly, the Task Control Block （TCB） is extended. And then, a new priority index table is created, in which each index pointer points to a set of homology priority tasks. Eventually, on the basis of reconstructing μC/OS-Ⅱ real-time kernel, task scheduling module is rewritten. Otherwise, schedulability of homology task supported by modified kernel had been analyzed, and deadline formula of created homology tasks is given. By theoretical analysis and experiment verification, the modified kernel can support homology priority tasks scheduling, meanwhile, it also remains preemptive property of original μC/OS-Ⅱ.     

Effects of self evaluation on late ERP components

High-density event-related potentials (ERPs) were measured when participants were required to evaluate oneself, significant others (father and mother) and the most familiar public figures (Lei Feng and Jiang Qing) based on trait adjectives. There were three referential conditions and a non-referential control condition including self-evaluation (SE), significant other-evaluation (SOE), general other-evaluation (GOE), and semantic positivity-evaluation (SPE). The behavioral data showed that RTs to GOE condition were longer than the other three conditions. Scalp ERP analysis revealed that (1) SPE condition elicited a more negative N2 than SE condition, which was associated with inhibition of responses; (2) SE condition elicited a more positive P300 than SPE condition, which was an index of attention to self-relevant stimuli; (3) there was no difference on the amplitude and latency of P300 between SE and SOE conditions, which reflected that the concept of “self” included intimate others (e.g., father and mother) in Chinese culture.