志贺菌属(Shigella 是人类细菌性痢疾的病原菌。 本属细菌包括痢疾志贺菌(. dysenteriae模式种)、 福氏志贺菌(S.flexneri)、鲍氏志贺菌(S.boydi)和宋内志 贺菌(S.sonnei)4个群(group)。 在我国菌痢以福氏和宋内志贺菌引起感染较为多见

轨道:与氢原子类似,其电子运动状态可描述为1s,2s,2px2p2p3s。 能量:与氢原子不同,能量不仅与n有关也与有关;在外加场的作用下,还与m有关

Handout 6: Proportional Compensation Eric Feron Feb25,2004 Plant under study: 1/10 G(s)=(s+1)(s/10+1)2 Compensation Scheme: We adjust the gain K in the feedback loop (draw the feedback loop below)

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一、泵前中格栅 1.设计参数: 设计流量Q=2.6×104m3/d=301L/s 栅前流速v1=0.7m/s,过栅流速v2=0.9m/s

The expectation or expected value of a random variable is a single number that tells you a lot about the behavior of the variable. Roughly, the expectation is the average value, where each value is weighted according to the probability that it comes up. Formally, the expected value of a random variable r defined on a sample space s is: (B)=∑R()Pr(o) To appreciate its signficance, suppose S is the set of students in a class, and we select a student uniformly at random. Let r be the selected student's exam score. Then

汽车制动效能,是指汽车迅速降低车速直至 停车的能力。汽车制动效能的评价指标是制动距 离S(单位m)和制动减速度(单位m/s2)。 1.制动距离 制动距离S,是指汽车以给定的初速u,从踩 到制动踏板至汽车停住所行驶的距离。制动距离 与踏板力(或者制动系管路压力)以及地面的附 着情况有关,也与制动器的热工况有关。 制动减速度是地面制动力的反映,而与地面 制动力与制动器制动力有关

Problem Set 3 Prof. Gene Chang (For Ph. D students, due on Dec. 28th in the class, or TA's office. For M.A. students, due on Dec. 26th, in the class or TA's office. Late turn-in may result in a penalty in the grade) 1. Kland is a Robinson Crusoe type economy. Robinson, as the consumer and the owner of the firm, has the utility function U(x,) =aIn x+ BInI, where is leisure. Robinson's endowment

Chapter 10 Topics Built-In Simple Types s Integral and Floating Point Data Types s Using Combined Assignment Operators s Prefix and Postfix Forms of Increment and Decrement Operators Additional C++ Operator

Chapter2函数 δ1函数概念 Example S=VI t≥0 s=-at t≥0 12 0≤t≤ 2h S=-8 Vg Definition1.设给定实数集合X,若存在一对应法则f,x∈X,3唯一的实数 y∈R与之对应。则称f是定义在X上的函数,记为: