两种进化算法在BSS中的应用比较

介绍了两种分别引人遗传算法和免疫算法的盲源分离方法．通过仿真比较试验表明,两种算法对混叠信号的分离都有效,但基于免疫算法的分离效果都优于基于遗传算法的分离结果．     

一种新设计的技术媒介远程教学模式理论分析框架

本文尝试建立一种新设计的技术媒介远程教学模式理论分析框架。首先指出教育技术学和教育传播学对研究技术媒介的远程教学的理论指导意义。在分析比较人际面授教学与技术媒介教学的基础上,进一步将技术媒介教学划分成技术环境中的面授教学和技术媒介的远程教学两类,随后集中论述技术媒介的远程教学的各种模式：教学信息传输模式、远程教学交互模式、远程学习模式,以及远程教学与远程学习的时空分离模式。最后,提出并讨论新设计的技术媒介远程教学模式的理论分析框架。     

Effects of operative conditions on membrane fouling of jet loop membrane bioreactor

The orthogonal experiments, which involves three factors： aeration intensity, suction time and suction suspended time, were designed to research membrane fouling of jet loop membrane bioreactor （JLMBR）. Experimental results indicate that increasing aeration intensity, reducing suction time and increasing suction suspended time all could mitigate membrane fouling effectively. However excessive aeration intensity, too short suction time and excessive suction suspended time were bad for bioreactor running. The optimal aeration intensity, suction time and suction suspended time were 0.75 1.00 m3/（m2.h）, 8 -10 min and 4 -5 min, respectively. The three factors all had effect on membrane pollution rate, while the suction time was the most important one and followed by aeration intensity and suction suspended time. It also indicates that, comparing with traditional submerged membrane bioreactors, JLMBR had lower membrane pollution rate.     

亲子分离对中学留守儿童应对方式的影响研究——以福清市两所中学初中生抽样问卷为例

通过采用简易应对方式问卷对360名初中生进行测查,探讨了亲子分离内部各因素对中学留守儿童应对方式的影响,为留守儿童的心理发展和健康成长提供依据。结果表明:留守儿童与非留守儿童的应对方式差异显著,留守儿童的应对方式更趋于消极。留守儿童的应对方式在年级、性别、分离时间、沟通频率、代养人类型上差异显著。结论:亲子分离后,亲子分离的时间、沟通频率和替代养育方式的不同都会显著的影响中学留守儿童的应对方式。     

基于时域卷积盲信号分离的雷达干扰抑制算法

把卷积盲分离算法应用于雷达系统抗干扰中,提出一种新的雷达系统干扰抑制算法. 该算法在时域中对四阶累积量进行联合块对角化,以实现雷达信号和干扰信号的盲分离. 计算机仿真结果表明,在无噪及含噪情况下,该算法均可把卷积混合的雷达回波信号及干扰信号分离开来,且有很好的分离性能.     

悬臂梁受线性分布荷载的辛解答

与传统的半逆解法不一样,采用弹性力学平面直角坐标系辛体系,运用分离变量法,求出矩形梁非齐次边界条件的解.辛解法能够有效处理各种边界条件,特别是矩形梁受线性分布荷载时,显示该方法的有效性.     

浅论段玉裁古韵十七部之得失

清代时,古音学的研究进入一个前所未有的发展时期,其间涌现出段玉裁等多位著名音韵学家。在顾炎武古韵十部、江永古韵十三部的基础上,段氏在其古音学代表作《六书音均表》中分古韵为十七部。其支脂之三分、真文分立、尤侯分立的发现历来为学者所称道,但十七部的划分仍有不少纰漏值得商榷。     

收费管理体制中“费改税”探讨

"费改税"和收费管理体制改革的最终目标是实现财政收入以税收为主,辅以少量收费收入的财源结构.应规范合理收费并建立健全相应管理机制,将部分具有税收性质的收费纳入税收轨道,取缔不合理收费.     

Toxic effects of Litsea elliptica Blume essential oil on red blood cells of Sprague-Dawley rats

Litsea elliptica Blume leaves have been traditionally used as medicinal herbs because of its antimutagenicity, che-mopreventative and insecticidal properties. In this study, the toxic effects of L. elliptica essential oil against Sprague-Dawley rat's red blood cells (RBCs) were evaluated. L. elliptica essential oil was given by oral gavage 5 times per week for 3 treated groups in the doses of 125, 250, and 500 mg/(kg body weight), respectively, and the control group received distilled water. Full blood count, RBC osmotic fragility, RBC morphological changes, and RBC membrane lipid were analyzed 28 d after the treatment. Although L. elliptica essential oil administration had significantly different effects on hemoglobin (Hb), mean cell hemoglobin concentration (MCHC), mean cell volume (MCV), and mean cell hemoglobin (MCH) in the experimental groups as compared to the control group (P<0.05), the values were still within the normal range. L. elliptica induced morphological changes of RBC into the form of echinoeyte. The percentage of echinocyte increased significantly among the treated groups in a dose-response manner (P<0.001). The concentrations of RBC membrane phospholipids and cholesterol of all treated groups were significantly lower than those of control group (P<0.001). However, the RBC membrane osmotic fragility and total proteins of RBC membrane findings did not differ significantly between control and treated groups (P>0.05). It is concluded that structural changes in the RBC membrane due to L. elliptica essential oil administration did not cause severe membrane damage.     

宋明武学概览

运用文献整理的方法,梳理了宋明两代大量史书、文集、笔记中与武学相关的资料,从生源、教学内容、管理机构与办法、学制以及其在教育体系中的地位,通过比较分析宋明武学的特点,指出明代武学的完备是在宋代武学的基础和不足上建立起来的,并形成了自己的特色。宋明武学的异同,既是文武分途的趋势使然,又是我国"文治"社会进一步完善的表现,不是"尚武"精神的表现,也是中央集权加强的必然。宋明武学的实效都未能实现其初衷,故又遭到严厉的批判,但其制度史意义不容小视,它对我国近现代的军事教育依然有借鉴价值。