Comparison of prototype and rote instruction of English names for Chinese visual characters

This study compared prototype and rote instruction of English names for Chinese visual characters. In the prototype condition, participants were taught the meaning of the prototype that served as the distinctive feature of multicomponent characters. In the rote condition, participants traced the character and wrote its translation. Participants learned more rapidly and maintained more words in the prototype condition.     

宽带钢冷轧机颤振控制的数值模拟

本文以较为准确的轧机振动状态下的轧制压力模型为基础，对宽带钢冷轧机干摩擦阻尼减振进行了数值模拟的研究。研究结果与实际观测值相等。     

特种钢用结晶器铜管破裂原因分析

通过对某特钢厂破裂的结晶器铜管进行金相实验、扫描电镜和能谱分析,并结合结晶器的生产、使用及失效过程情况,综合受力分析,认为铜管破裂原因主要是环境介质硫渗入形成硫化物,在拉应力作用下,裂纹沿脆性质点扩展导致的破坏。     

计算机网络安全问题及防范对策

文章简单阐述了当前计算机网络所面临的主要安全威胁,并在此基础上提出了分层控制的方案,建立了不同层次间网络安全的防范措施,希望以此来提高网络安全性。     

Correction to: Parallel Single-Pixel Imaging: A General Method for Direct–Global Separation and 3D Shape Reconstruction Under Strong Global Illumination

International Journal of Computer Vision - In the original publication of the article, the name of the last author should be Yang Xu, instead of Xu Yang. “Xu” is the family name, and...     

Output chattering attenuation between two tracking controllers

In this paper, an output chattering attenuation scheme is proposed for two tracking controllers. The controllers have integral actions and are used to eliminate the steady-state tracking errors. By designing a compensator and reducing the discontinuous switching, the output chattering at the switching points can be attenuated significantly. Moreover, combining with the generalized Kalman-Yakubovich-Popov (KYP) lemma and the parameter-dependent Lyapunov function method, this problem can be characterized in terms of linear matrix inequality (LMI) formulation. Finally, the simulation results demonstrate the effectiveness of the proposed method.     

圆柱体平板镦粗应力场的有限元分析

应用刚粘塑性有限元法对圆柱体在两平板间镦粗时的应力场进行了分析 ,给出了毛坯在不同初始高径比时的心部应力随压下量的变化曲线。由此得出 :在变形过程中 ,圆柱体心部存在两向拉应力 ;并且在墩粗过程中 ,当瞬时高径比约为 1 .0时 ,心部σθ、σr 由拉应力转变为压应力。     

金属及合金中钛的光度分析近况

综述了金属及合金中钛的光度测定方法新近进展情况。     

钢丸增强ZA27复合材料的制备与摩擦磨损特性

采用搅溶加压铸造研制了钢丸增强ＺＡ２７复合材料（ＺＳＣ），复合工艺简便，ＺＳＣ组织致密，钢丸与基体呈冶金结合，切削加工性能良好；在干摩擦和油润条件下，ＺＳＣ的耐磨性随钢丸量的增加而增加，并优于相同试验条件下的ＺＡ２７合金；干摩擦下ＺＳＣ具有自润滑能力和良好的耐磨减摩性能，油润下随滑动速度和载荷的增大其耐磨性较ＺＡ２７更具优势。