中国矿业大学：《采矿学》课程电子教案（PPT教学课件）第十七章 准备巷道布置及参数分析 Layout and parameter of preparation roadway in district

中国矿业大学：《采矿学》课程电子教案（PPT教学课件）第九章 单一长壁采煤法

中国矿业大学：《采矿学》课程电子教案（PPT教学课件）第二十一章 井田开拓方式

中国矿业大学：《采矿学》课程电子教案（PPT教学课件）第二十三章 井底车场（underground station or shaft bottom）

You are the CEO of Coca-Cola. You are responsible for bringing a refreshing taste to zillions of people all over the world, but want to keep the recipe secret from Pepsi’s industrial spies

Diffie-Hellman Diffie-Hellman is a public key distribution scheme First public-key type scheme, proposed in 1976. W Diffie, M E Hellman, \New directions in Cryptography\, IEEE Trans. Information

Public-Key Applications can classify uses into 3 categories: – encryption/decryption (provide secrecy) – digital signatures (provide authentication) – key exchange (of session keys)

Numbers Integers Real Arithmetic Operations Addition and subtraction Multiplication and division Exponentiation and logarithm

Digital Signatures and Message Authentication Code (MAC) overview Suppose Alice and Bob share a secret key k which determines hash function hk Alice sends (x, y) to Bob where y = hk

6-1试用节点法计算题6-1图(a)所示桁架各杆件的内力