通过热模拟机研究超快冷工艺中冷却速率和终轧温度对X70管线钢组织细化及马氏体/奥氏体小岛的影响.随着冷却速率的增大,铁素体晶粒尺寸减小,M/A岛的体积分数先增大后降低,M/A岛的尺寸变化则相反.提高终轧温度,铁素体晶粒尺寸略微增大,M/A岛的体积分数增加;但在900~940℃范围内,随着终轧温度的升高,试样中M/A岛的体积分数略减小,尺寸增大

定理1设向量a≠0,那么,向量b平行于a的充分必要 条件是:存在唯一的实数,使b=a 证明充分性是显然的,只需证必要性. 设bla.取,当b与a同向时取正值, 当b与a反向时取负值,即b=a.这是因为此时b与a同向

两因素方差分析是讨论两因素试验的统计推断问题。本 文分非重复试验和重复试验两种情形进行讨论。 一、两因素非重复试验的方差分析 设有两个因素A,B,因素A有r个不同水平: A,A2…,A,;因素B有s个不同水平:B1,B2…,B 在A,B的每一种组合水平(A,B)下作一次试验,试验 结果为X,=(i=1,…,r,j=1,2,,),所有X,相互独立

定理1(无穷小与函数极限的关系) 在自变量的同一变化过程x→x(或x→∞)中,函数f(x) 具有极限A的充分必要条件是(x)=A+a,其中a是无穷小 简要证明令a=f(x)-A,则fx)-a

8.1 Explore some of the emerging technologies that may impact analytics, business intelligence (BI), and decision support 8.2 Describe the emerging Internet of Things (IoT) phenomenon, potential applications, and the IoT ecosystem 8.3 Describe the current and future use of cloud computing in business analytics 8.4 Describe how geospatial and location-based analytics are assisting organizations 8.5 Describe the organizational impacts of analytics applications 8.6 List and describe the major ethical and legal issues of analytics implementation 8.7 Identify key characteristics of a successful data science professional

6.1 Understand the applications of prescriptive analytics techniques in combination with reporting and predictive analytics 6.2 Understand the basic concepts of analytical decision modeling 6.3 Understand the concepts of analytical models for selected decision problems, including linear programming and simulation models for decision support 6.4 Describe how spreadsheets can be used for analytical modeling and solutions 6.5 Explain the basic concepts of optimization and when to use them 6.6 Describe how to structure a linear programming model 6.7 Explain what is meant by sensitivity analysis, what-if analysis, and goal seeking 6.8 Understand the concepts and applications of different types of simulation 6.9 Understand potential applications of discrete event simulation

5.1 Describe text mining and understand the need for text mining 5.2 Differentiate among text analytics, text mining, and data mining 5.3 Understand the different application areas for text mining 5.4 Know the process of carrying out a text mining project 5.5 Appreciate the different methods to introduce structure to text-based data 5.6 Describe sentiment analysis 5.7 Develop familiarity with popular applications of sentiment analysis 5.8 Learn the common methods for sentiment analysis 5.9 Become familiar with speech analytics as it relates to sentiment analysis

作业11函数f(x)在区间(a,b)有连续的导函数,且limf(x)与limf(x) x→a+ x→b- 均存在有限

1.求下列无穷积分的值: d x dx(a>0); (4) e\sin bxdx(a>0

1.设函数F(x,y)满足 (1)在区域D:x-a≤x≤x+a,yo-b≤y≤yo+b上连续; (2)F(x0,y)=0