关于课堂教学的有效性

很多教师有这样的感觉，探究活动正在成为一种“时尚”，节节有探究，课课有活动．一节公开课如果没有探究活动，就不会受到好评，也就不能成为样板．这样就使得很多教师为了活动而活动，课堂看上去热热闹闹，课后学生不知道这节课到底学了什么，这就是课堂教学的有效性问题．     

汉语降频助听算法的实验分析与改进

降频助听算法是改善听障患者声音辨识能力的最安全有效的方法. 本文以主观测试实验为手段, 通过分析当前算法的声音识别能力的不足, 提出一种自适应慢放降频算法. 算法结合慢放算法和频移算法的优点, 并能根据信号的频谱结构, 自适应调整慢放因子, 降低时域不同步性. 并且, 通过分析含噪信号和噪声信号的频谱关系, 提出一种噪声下的慢放因子评估方法. 实验结果显示, 同其他降频算法相比, 该算法可以提高15%到20%的识别率. 在对听障患者的测试中, 同传统的助听设备相比, 平均识别率也获得显著改善.     

蓄冰球内固定融化问题的理论与实验研究

本文针对一种自行开发的具有较高融点的新型有机混合蓄冷工质，首先建立了描述融化过程的数学模型，并应用边界元方法给出了适用于该过程的数值解，最终得到了在不同工况下相界面和热流随时间的变化规律，为进一步优化蓄冷系统提供了理论依据；同时，在小型蓄冷实验台上进行了相应工况的实验研究，验证了理论解。     

新课标理念下的物理课堂教学评价原则

什么样的物理课是一堂好课？这是教育决策者、物理教育研究者和物理教师共同关注的问题．     

电子型高温超导体/铁电体/巨磁阻材料异质结的生长及其电输运性质的研究

本文中采用脉冲激光沉积的方法原位制备了结构完整的La1.89Ce0.11CuO4(LCCO)/Ba0.7Sr0.3TiO3(BST)/La0.67Sr0.33MnO3(LSMO)三层膜,并在此基础上制得了类似P-I-N型的全钙钛矿结构材料异质结.在不同的温度区间对其电输运性质进行了测量.测量结果表明随着充当绝缘层的Ba0.7Sr0.3TiO3的厚度的变化,异质结的电输运机制也在变化.当其厚度到达25纳米时,整个结在低温区呈现良好的整流特性.     

洗涤时pH值对纳米级β-Ni(OH)2的团聚程度和电化学性能的影响（英文）

Nano-scale nickel hydroxide was prepared by precipitate transformation method in the paper. Effect of rinse pH on the agglomeration degree and electrochemical performance of nano-scale Ni (OH)2 was investigated. The measurement results of XRD and TEM indicate that the prepared nano-scale Ni (OH)2 is β (II)-phase, the grain size is in the rang of 10 ～ 50nm, and rinse pH exerts a great influence on the agglomeration degree of nano-scale Ni(OH) 2.The agglomeration of material becomes very obvious when rinse pH = 11, and the density of nano-scale Ni(OH)2 is enhanced obviously. Cyclic voltammetry(CV) and simulate cells experiment show that nano-scale Ni(OH)2 with suitable agglomeration degree have better electrochemical CV performance than those with ideal disperse Ni (OH)2and micron Ni(OH)2, and its proton diffusion coefficient is also the highest. It can elevate the discharge potential platform and prolongs discharge time, so the utilization ratio of Ni (OH)2 is raised.``     

基于偶数帧段输入隐马尔可夫模型的噪声环境下汉语连续语音识别研究

提出了利用偶数帧段输入隐马尔可夫模型（ＨＭＭ）提高在噪声环境下汉语连续语音识别系统鲁棒性的方法，并提出了对于传统谱相减降噪技术的修改方法。实验结果表明，本文的方法能有效地提高噪声背景下汉语连续语音识别系统的性能。     

塑料闪烁体的辐照特性

利用⁶⁰Co放射源分别对3种塑料闪烁体(BC-408, EJ-200, BC-404)进行辐照损伤研究, 比较辐照前后的透射谱、发射谱及光产额的变化, 发现3种闪烁体在低剂量具有较好的抗辐照性能; 当照射剂量超过1.44×10⁴Gy时,透射谱明显变坏, 光输出减少很严重, 但发射谱却保持不变.     

Structural and Electrical Characteristics of Pb（Zr0.53,Ti0.47）O3 Thin Films Deposited on Si （100） Substrates

Pb(Zr0.53, Ti0.47)O3 (PZT) films were directly deposited on Si substrates without a buffer layer by pulsed laser deposition. Only(110)-oriented PZT peaks (other than Si substrate peaks) were observed from the XRD data. The electrical properties of the PZT/Si capacitor were characterized in terms of both the capacitance versus voltage (C-V) and current versus voltage (I-V) measurements. The clockwise trace of the C-V curve shows ferroelectric polarization switching, as is expected. From the I-V curves, the Schottky emission and spacecharge-limited-current behaviour are found to be the mainly leakage current mechanism in a certain electric field range in the negative and positive bias, respectively.     

Topological aspect of Chern-Simons p-branes

By generalizing the topological current of Abelian Chern Simons （CS） vortices, we present a topological tensor current of CS p-branes based on the φ-mapping topological current theory. It is revealed that CS p-branes are located at the isolated zeros of the vector field φ（x）, and the topological structure of CS p-branes is characterized by the winding number of the φ-mappings. Furthermore, the Nambu-Goto action and the equation of motion for multi CS p-branes are obtained.