8.1 素数 Prime Numbers 8.2 费马定理和欧拉定理 8.3 素性测试 8.4 Chinese Remainder Theorem 中国余数定理CRT 8.5 离散对数问题(discrete logarithm)

7.0 introduction 7.1design of discrete-time IIR filters from continuous-time filters 7.1.1 filter design by impulse invariance 7.1.2 filter design by bilinear transform 7.1.3 not low pass filter design and other method 7.2 design of FIR filters by windowing. 7.3 summary

The algorithm principles, features of the software package MOD and comparative study of the algorithim are presented. At the end of the algorithm perfermance curves and the evalutive results, and the design examples for mechanical engineering are given

The role of Mg in alloy/718 has been systematically investigated. Mg raises not only high temperature tensile and stress-rupture ductilities but also increases considerably smooth and notch stress-rupture life. Mg containing alloy 718M is free of stress-rupture notch sensitivity. Mg improves creep and fatigue interaction properties （LCF or cyclic stress rupture） at any grain size. The basic role of Mg is equilibrium segregation at grain boundaries which helps to change continuous grain beundary (5-Ni3Nb morphology to discrete globular form which has a retardation effect on intergranular fracture. Mg promotes the change from intergranular to transgranular fracture mode

目前钢铁行业已成为大气污染防治的重点，为解决现有钢铁行业对于 PM2.5 细颗粒难以捕集的难题，实现粉尘的超低排放. 基于 CFD-DPM（computational fluid dynamics-discrete phase model）方法对磁性纤维产生的磁场以及高梯度磁场等不同磁场形式下单纤维对钢铁行业捕集 PM2.5 性能的影响进行研究，通过 X 射线衍射图谱分析可知钢铁行业生产过程产生的粉尘因含有 Fe3O4 以及单质 Fe 而具有磁特性，进而提出了利用磁场来增强单纤维捕集 PM2.5 性能的方法

Introduce Network Representation with Signal Flow-Graph Basic IIR System Structures Basic FIR System Structures Linear Phase Structures Frequency Sample

延安大学：《数字信号处理》课程PPT教学课件（DigitalSignal Processing，DSP）Chapter 3 Finite-Length Discrete Transforms（DFT）

复旦大学：《离散数学 Discrete Mathematics》英文讲义_15 Application and Limitations

复旦大学：《离散数学 Discrete Mathematics》英文讲义_14 Soundness and Completeness of Predicate Logic

复旦大学：《离散数学 Discrete Mathematics》英文讲义_12 Semantics of Predicated Language