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Please read your package and describe it at least 40 bytes in English

说明：  By throwing an exception to indicate the occurrence of an error(By throwing an exception to indicate the occurrence of an erro)

高教出版社的《并行算法实践》一书的源代码，内容为MPI程序源代码(Higher Education Publishing House s Parallel Algorithm for the practice of the book s source code, content for the MPI source code)

RSA加密算法，实现对文字的加密，将文字转化成数字后用RSA原理进行加密(This is RSA encryption algorithm)

MATLAB中的所有练习源程序,软件包形式,对学习MATLAB很有帮助(MATLAB source code for all exercises, the package forms of learning MATLAB helpful)

孤独的运货员aaaaaaaaaaaaaaaaaaaaaa(Lonely delivery staff aaaaaaaaaaaaaaaaaaaaaa)

设p是素数，a是p的本原根，即a1,a2,a3,…,ap-1在mod p下产生1到p-1的所有值，所以对任何b属于{1,…,p-1},有唯一的i属于{1,…,p-1}使得ai mod p 等于p。称i为模p下以a为底b的离散对数。(P is a prime number based, a is the primitive root p, that is, a1, a2, a3, ..., ap-1 in the mod p under 1 to p-1 for all values, so for any b belongs to (1, ..., p-1), there are only i belong to (1, ..., p-1) makes ai mod p equivalent to p. Said i was under the modulus p to a for b at the end of the discrete logarithm.)

数据结构算法集锦：包括大量常用算法，如求两数的最大公约数、素数的求法、Prim算法、Kruskal算法、最短路径、Dijkstra 算法、排序相关算法、高精度计算相关算法(algorithm data structure highlights include : large common algorithms, such as for the number two majors, for the prime numbers, Prim algorithm, Kruskal algorithm, the shortest path, the Dijkstra algorithm, scheduling algorithms, high-precision calculation algorithms, etc.)

本文基于大型通用有限元软件ANSYS和MATLAB,探索三维实体模型下进行PC桥梁结构整体仿真分析的途径,研究其关键理论及专业模块开发技术。重点研究了预应力筋的模拟、预应力效应的等效转换和桥梁截面切片技术。研究成果可广泛应用于PC桥梁的三维仿真领域,具有较大的理论意义和工程实用价值。对写这方面研究很有帮助(Based on large-scale general-purpose finite element software ANSYS and MATLAB, explore the three-dimensional solid model of the bridge structure under the PC way to the overall simulation analysis to study the key theoretical and professional development of technology modules. Focused on the tendons of the simulation, the equivalent effect of prestressed bridge conversion and cross-section slicing. Research results can be widely used in PC bridges the field of three-dimensional simulation with the larger theoretical and practical engineering value. Research in this area to write very helpful)

P2R打印机串口指令集编程手册，Olivetti/IBM/Epson(P2R printer serial instruction set programming manual, Olivetti/IBM/Epson)