2-1 已知放大器如图 1-1 所示，EC=12 V, RB1=30K, RB2=10K, RC=3K, RF=390Ω, RE=3K, RL=3K,β=50 求：(1).静态工作点；(2).画出微变等效电路；(3).电压放大倍数；(4).放大器的 输入电阻；(5).放大器的输出电阻

Heat Transfer Su Yongkang School of Mechanical Engineering External Flow: Other Shapes Where we’ve been …… Empirical correlations and analytical solutions Where we’re going: Applications to other shapes (cylinders and spheres)

10.1 概述 10.2 镧系元素重要化合物 10.3 稀土元素(RE)

and making as much effort as it can to restore and create more suitable re- serves for the survival and development of wildlife. In short, if the government and the whole society really realize the prob- lem, pay attention to it, and work togeth PNP

Two stimulating and innovative papers by Morrill were concerned with waves of spatial diffusion.(Morrill,[1, 2 )The purpose of the first was to propose some insights and interpretations which can be obtained by characteriz ive-like phend Morrill scopic and theoretical implications of such a conceptualization. He was concerned with both time and distance, and noted that in earlier conceptualizations more emphasis had been placed on de ecay re elated to time than on that related to distance. He therefore hypothesized that the number of innovations would de-

一、安培环路定理(Ampère circuital theorem) 二、安培环路定理应用举例(Application examples)

通过透射电镜对Fe-25%Cr-6%Al-RE(富镧)合金氧化行为进行研究.结果表明:经1200℃恒温2h纯氧中氧化,合金中镧以六方La2O3微小颗粒沉淀在氧化膜中α-Al2O3晶粒的顶端及晶界上。它们阻碍铝向表面扩散,抑制氧化膜的侧向生长;在1200℃/室温之间热循环氧化历程.稀土组元加快了合金的内氧化。它们以氧化铝、氧化镧形式出现,在靠近氧化膜/金属界面,立方La2O3颗粒平行于晶界并在合金基体上沉积

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The book is divided into five sections: 1 The Business Model Canvas, a tool for describing, analyzing, and designing business models, 2 Business Model Patterns, based on concepts from leading business thinkers, 3 Techniques to help you design business models, 4 Re-interpreting strategy through the business model lens, and 5 A generic process to help you design innovative business models, tying together all the concepts, techniques, and tools in Business Model Generation. The last section offers an outlook on five business model topics for future exploration. Finally, the afterword provides a peek into “the making of” Business Model Generation

华罗庚研讨课（学习笔记）A Deep-Learning Based Semi-Interactive Method for Re-colorization