《教育技术学专业汉语》辅助教学研究

文章从少数民族学生的特点和《教育技术学专业汉语》课程性质出发,阐述了在《教育技术学专业汉语》课程中采用辅助教学的重要性与可行性及具体运用形式——多媒体课件和思维导图的运用,并提供了具体制作方法和案例.     

步进电机细分技术在经济型数控机床中的应用

本文叙述了步进电机细分原理及微机控制系统，并将其应用于经济型数控铣床的横向进给伺服系统，有效提高了开环数控系统的定位精度。     

注入控制铜蒸气激光方向性时间过程测量

实验研究了注入控制对铜蒸气激光非稳腔输出光束质量的影响，从输出光发散角时间分辨过程的测量结果说明注入加速被注入腔内激光发散角的减小过程。由于被注入腔内放大自发辐射的存在，为得到较好的注入控制效果，注入光的脉宽和进入被注入腔的延时必须恰当。     

Invariants for normal completely positive maps on the hyperfinite II1 factor

We investigate certain classes of normal completely positive (CP) maps on the hyperfinite II₁ factorA. Using the representation theory of a suitable irrational rotation algebra, we propose some computable invariants for such CP maps. Dedicated to Professor K B Sinha     

An Improved S-Random Interleaver Design for Turbo Code Based on Chaos Model

A new method to design interleaver based on Henon chaos model is presented. The designed interleaver is with rather random behavior. Experimental results show that the proposed S-henon interleaver make a magnitude of im provement in bit error rate （BER） performance by 0.4 dB compared with the S-random interleaver for AWGN channel respectively. The S-henon interleaver may be adapted to 3G mobile communication systems.     

手摇套料钻的理论分析及改进意见

本文揭示了从日本引进的手摇套料钴的工作进给原理为一差动螺旋传动,阐明了它的使用方法,详细分析了它的齿轮传动、螺纹传动、刀具结构及几何角度,并提出了相应的改进意见。     

超声波测井仪测量精度问题

本文着重阐述立井钻井法施工时,使用CJ501声波并仪测量井筒直径,影响测量精度的因素及其误差修正方法.     

两个数学建模问题的探讨

探讨了两个在教科书中作为例题的数学建模问题，一个是关于渔业生产的，另一个关于体育训练，对于前者，提出一个更为合理的解法；对于后者，则提出其中数学推导上的错漏并得出新的结论。     

Noise-induced asymptotic periodicity in a piecewise linear map

We examine asymptotically periodic density evolution in one-dimensional maps perturbed by noise, associating the macroscopic state of these dynamical systems with a phase space density. For asymptotically periodic systems density evolution becomes periodic in time, as do some macroscopic properties calculated from them. The general formalism of asymptotic periodicity is examined and used to calculate time correlations along trajectories of these maps as well as their limiting conditional entropy. The time correlation is shown to naturally decouple into periodic and stochastic components. Finally, asymptotic periodicity is studied in a noise-perturbed piecewise linear map, focusing on how the variation of noise amplitude can cause a transition from asymptotic periodicity to asymptotic stability in the density evolution of this system.