Multiple Choice 1. Equilibrium a. is a concept unique to economics. b. always occurs where supply equals demand. C. results when opposing forces fail to cancel each other out. d. indicates balance. e. all of the above

1. The equilibrium price of a good is determined by the intersection of its supply and demand curves. We can know everything about a goods cost of production( that, is we can know its supply exactly) yet still not know where the demand curve will intersect the supply curve

Summary textbook: Varian, Hal R., 1992, Microeconomics Analysis, 3rd ed. Mas-Colell, A., M. Whinston, and J. Green, 1995, Microeconomics Theory. assignments: twice a week; Team work; Deliver on the class

1 8255A 简介 2 8255A 的引脚及结构功能 3 8255A的控制字及工作方式 4 8255A 与系统总线的连接 5 8255A 的应用设计

September 8, 2000 1. Describe the difference between slip and separation on a fault. 2. What type of offset() can be interpreted from the map below? Give a detailed description of your logic on the back of the page

数字通信系统具有许多优点。然而许多信源输出都是模拟信号。 若要利用数字通信系统传输模拟信号,一般需三个步骤: (1)把模拟信号数字化,即模数转换(A/D); (2)进行数字方式传输; (3)把数字信号还原为模拟信号,即数模转换(D/A) 由于A/D或D/A变换的过程通常由信源编(译)码器实现,所以我们把发端 的A/D变换称为信源编码,而收端的D/A变换称为信源译码,如语音信号的数字 化叫做语音编码

定义1设a1,a2,…,am,β是一组n维 向量,若存在m个实数k1,k2,…km使得 β=ka1+k2a2++kmam,则称β可以 由a1,a2,…,an线性表示( linear representation).或称a1,a2,…,an线性 表示(linear generate) 例如:a1=(1,2,0)T,a2=(1,0,3)T,a3= (3,4,3)T,则a3=2a1+a2,即存在实数k =2,k2=1使得a3=ka1+k2a2,故a3可以 由a1,a2线性表示。(大家想一想,这里的常 数k1=2,k2=1是怎么求出来的?)

Part I: Describe the following 10 terms (3 points each). (1) EF-G: a. its structure likes tRNA b. it is a translational elongation factor c. it binds to ribosome when associated with GTP

4.3向量组的秩与最大无关组 1.向量组的秩:设向量组为T,若 (1)在T中有r个向量a1,a2,…,a,线性无关; (2)在T中有r+1个向量线性相关(如果有r+1个向量的话) 称a1,a2,…,a,为向量组为T的一个最大线性无关组, 称r为向量组T的秩,记作:秩(T)=r

定义:对于An,若有B满足AB=BA=E,则称A为可逆矩阵, 且B为A的逆矩阵,记作A-1=B 定理1若A为可逆矩阵,则A的逆矩阵唯一 证设B与C都是A的逆矩阵,则有