组卷网 > 高中英语综合库 > 主题 > 人与社会 > 科普与现代技术 > 科普知识
题型:阅读理解-阅读单选 难度:0.4 引用次数:85 题号:20634704

Nash equilibrium (纳什均衡) is named after John Nash, an American mathematician. It is a kind of concept, which attempts to determine mathematically and logically the actions that participants of a game should take to secure the best outcomes for themselves.

To find it in a game, one would have to model out each of the possible scenarios to determine the results and then choose what the most satisfactory strategy would be. In a two-person game, this would take into consideration the possible strategies that both players could choose. If neither player changes their strategy knowing all of the information, a Nash equilibrium has occurred.

Imagine a game between Tom and Sam. In this simple game, both players can choose strategy A to receive $1, or strategy B to lose $1. Logically, both players choose strategy A and receive a payoff of $l. If you revealed Sam’s strategy to Tom and vice versa (反之亦然), you see that no player’s choice is different from the original one. Knowing the other player’s move means little and doesn’t change either player’s behavior. Outcome A represents the Nash equilibrium.

Nash equilibrium helps a player determine the best payoff in a situation based on not only their decisions but also the decisions of other parties involved. It can also be used in many aspects of life, from economics to social behavioral sciences, from business strategies to a house sale and so on.

Unlike dominant strategy, Nash equilibrium doesn’t always lead to the most satisfactory outcome. In most cases, such as in war, whether that is a military war or a bidding war, an individual rarely knows the opponent’s strategy or what they want the outcome to be. It just means that an individual chooses the best strategy based on the information they have. Nash equilibrium can only occur if a player chooses to remain with their current strategy if they know their opponent’s strategy. Furthermore, in multiple games played with the same opponents, it does not take into consideration past behavior, which often predicts future behavior.

1. Which kind of concept does Nash equilibrium belong to?
A.Game theory.
B.Secrecy strategies.
C.Player information.
D.Participation qualifications.
2. How does the author explain Nash equilibrium?
A.By quoting sayings.B.By drawing a parallel.
C.By making comparisons.D.By giving an illustration.
3. What does paragraph 4 mainly tell us about Nash equilibrium?
A.Its elements.B.Its drawbacks.
C.Its applications.D.Its backgrounds
4. What is the author’s attitude to Nash equilibrium?
A.Resistant.B.Objective.
C.Confused.D.Curious.
【知识点】 科普知识 说明文

相似题推荐

阅读理解-阅读单选(约350词) | 较难 (0.4)
【推荐1】As many as 4 out of every 1,000 infants born today have permanent hearing loss.When parents learn that their child has hearing loss, they are faced with many difficult decisions.These decisions can include choosing therapies and schools, as well as finding financial help for hearing aids or cochlear implants (人工耳蜗).
Help Me Hear Foundation is a public charity that gives the gift of hearing to deaf children from families existing on very low incomes around the world.The foundation offers life-changing services for impoverished families, and provides real help for children with hearing impairment who may otherwise be left behind in schools or society due to their lack of hearing.
Help Me Hear Foundation believes that a child’s first years of development are critical.Being able to hear is vital to human, and Help Me Hear Foundation seeks to provide a positive lasting impression on society through its programs.Help Me Hear Foundation has many goals, including relieving the burden on communities with hearing-impaired infants and children, and strengthening the social structure of families and neighborhoods.
Recipients of Help Me Hear Foundation’s benefits receive state-of-the-art hearing devices that otherwise would cost thousands of dollars per child over the course of their lifetime.The Foundation raises money through donations for hearing aids and cochlear implants, which saves recipients and their families on average over $50,000 on related expenses.
The Foundation tries to be a transparent charity, and wants to be a catalyst for allowing deaf and hearing-impaired children to develop in a typical fashion alongside their peers.
Needy families can obtain information on specific services, and find out about deafness education by visiting the Help Me Hear Foundation’s website.The website offers helpful information on how hearing aids work, and how hearing aids ease many of the learning and language challenges that hearing-impaired children deal with on a daily basis.
1. Help Me Hear Foundation was probably set up to _____.
A.build schools for deaf children
B.research deaf children’s behavior
C.protect deaf children from being ignored
D.offer real help to poor deaf children
2. We learn from the text that _____.
A.the local government is in charge of the foundation
B.the work of the foundation depends on donations
C.even blind children can turn to the foundation
D.poor deaf African children cannot get help from the foundation
3. Visit the foundation’s website, and you will learn about _____.
A.the function of hearing aids
B.the specific services the foundation needs
C.the challenges that children face every day
D.the prices of a variety of hearing aids
4. For whom is the text most probably written?
A.Poor parents who have deaf children.
B.Doctors who want to improve skills.
C.Students who cannot see the blackboard clearly.
D.Teachers who have deaf children in their class.
5. The author writes the text mainly to _____.
A.tell how to avoid permanent hearing loss
B.explain how hard a life deaf children live
C.introduce Help Me Hear Foundation
D.advise people to give money to Help Me Hear Foundation
2015-06-11更新 | 211次组卷
阅读理解-阅读单选(约300词) | 较难 (0.4)
名校

【推荐2】You’re sitting on the sofa, and there’s your dog, right at your feet. You stand up? He stands up. But then you head to the bathroom, and guess who comes with? Why, your dog, of course. But why? Why does your dog follow you like a shadow, no matter where you go?

Ever get the feeling you're being followed? As for why your companion follows you everywhere you go, read on !

“When dogs follow their owners, there can be several scientific explanations, depending on the dog and the individual situation,”according to Mary Burch, Ph.D., an animal behaviorist(行为学家).

These explanations include:

Positive reinforcement(正面强化): When your dog follows you, good things happen. Think dog food, a hot bath and taking a walk around the neighborhood. Your dog’s no dummy. And one of his many talents is learning from experience, that is “reinforcement.”

Natural instinct(本能) to be part of a pack: In fact, a study out of Princeton University that was published in the journal, Science Advances, shows that your dog’s drive (驱动力)to follow you around (as well as watch you attentively and seek physical contact (身体接触) from you) lies in his genes(基因).

Feel good chemicals(化学物质): Your presence causes your dog’s brain to release “feel good” chemicals, Dr. Primm explains, citing this study. Considering how much we as humans enjoy those feel-good chemicals, it’s no surprise your dog likes them too—and will follow you around to get some!

Sense of responsibility : As you move about your home, your dog might feel that you are patrolling your territory (巡视领地) and take on the duty to assist you.

1. What is the passage mainly about?
A.Explanations for some dog behaviors.
B.Some natural instincts of the dogs.
C.The reasons why dogs follow you.
D.Dogs are good friends of human.
2. How does the author introduce the topic?
A.By listing numbers.
B.By giving examples.
C.By telling a story.
D.By making a survey.
3. What does the underlined word “dummy” mean in Para 5?
A.cute.B.considerate.
C.stupid.D.lovely.
4. Why does the dog like to be part of a pack?
A.This kind of behaviour is reinforced.
B.Dog’s brain releases chemicals.
C.Dogs have sense of responsibility.
D.It is passed from elder generations.
2018-11-22更新 | 207次组卷
阅读理解-阅读单选(约350词) | 较难 (0.4)
真题 名校
文章大意:本文是一篇说明文。文章主要介绍了数字极简主义生活方式的优点,倡导简单的数字生活方式。

【推荐3】The goal of this book is to make the case for digital minimalism, including a detailed exploration of what it asks and why it works, and then to teach you how to adopt this philosophy if you decide it’s right for you.

To do so, I divided the book into two parts. In part one, I describe the philosophical foundations of digital minimalism, starting with an examination of the forces that are making so many people’s digital lives increasingly intolerable, before moving on to a detailed discussion of the digital minimalism philosophy.

Part one concludes by introducing my suggested method for adopting this philosophy: the digital declutter. This process requires you to step away from optional online activities for thirty days. At the end of the thirty days, you will then add back a small number of carefully chosen online activities that you believe will provide massive benefits to the things you value.

In the final chapter of part one, I’ll guide you through carrying out your own digital declutter. In doing so, I’ll draw on an experiment I ran in 2018 in which over 1,600 people agreed to perform a digital declutter. You’ll hear these participants’ stories and learn what strategies worked well for them, and what traps they encountered that you should avoid.

The second part of this book takes a closer look at some ideas that will help you cultivate (培养) a sustainable digital minimalism lifestyle. In these chapters, I examine issues such as the importance of solitude (独处) and the necessity of cultivating high-quality leisure to replace the time most now spent on mindless device use. Each chapter concludes with a collection of practices, which are designed to help you act on the big ideas of the chapter. You can view these practices as a toolbox meant to aid your efforts to build a minimalist lifestyle that works for your particular circumstances.

1. What is the book aimed at?
A.Teaching critical thinking skills.B.Advocating a simple digital lifestyle.
C.Solving philosophical problems.D.Promoting the use of a digital device.
2. What does the underlined word “declutter” in paragraph 3 mean?
A.Clear-up.B.Add-on.C.Check-in.D.Take-over.
3. What is presented in the final chapter of part one?
A.Theoretical models.B.Statistical methods.
C.Practical examples.D.Historical analyses.
4. What does the author suggest readers do with the practices offered in part two?
A.Use them as needed.B.Recommend them to friends.
C.Evaluate their effects.D.Identify the ideas behind them.
2023-06-11更新 | 13168次组卷
共计 平均难度:一般