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. |
A.By quoting sayings. | B.By drawing a parallel. |
C.By making comparisons. | D.By giving an illustration. |
A.Its elements. | B.Its drawbacks. |
C.Its applications. | D.Its backgrounds |
A.Resistant. | B.Objective. |
C.Confused. | D.Curious. |
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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 |
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 |
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 |
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. |
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 |
【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. |
A.By listing numbers. |
B.By giving examples. |
C.By telling a story. |
D.By making a survey. |
A.cute. | B.considerate. |
C.stupid. | D.lovely. |
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. |
【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. |
A.Clear-up. | B.Add-on. | C.Check-in. | D.Take-over. |
A.Theoretical models. | B.Statistical methods. |
C.Practical examples. | D.Historical analyses. |
A.Use them as needed. | B.Recommend them to friends. |
C.Evaluate their effects. | D.Identify the ideas behind them. |
【推荐1】A Scientist turns out to be able to see the future by offering each of some four-year-olds a piece of candy and watching how he or she deals with it. Some children reach eagerly for the treat they see. Some last a few minutes before they give in. But others are determined to wait until the last moment.
By the time the children reach high school, something remarkable has happened. A survey found that those who as four-year-olds had enough self-control to hold out generally grew up to be more popular, adventurous, confident and dependable. The children who gave in to temptation early were more likely to be lonely, easily frustrated and inflexible.
Actually, the ability to delay reward is a sign of emotional intelligence which doesn't show up on an IQ test.
The hardware of the brain and the software of the mind have long been scientists' concerns. But brain theory can't explain what we wonder about most, like the question why some people remain upbeat in the face of troubles that would sink a less resistant person.
Here comes the theory of Daniel Goleman, writer of Emotional Intelligence: when it comes to predicting people's success, brain ability measured by IQ may actually matter less than the qualities of mind once thought of as "character".
EQ is not the opposite of IQ. What researchers have been trying to understand is how they work together; how one's ability to handle stress, for instance, affects the ability to concentrate and put intelligence to use. Among the ingredients for success, researchers now generally agree that IQ accounts for about 20%; the rest depends on everything from social class to luck.
While many researchers in this relatively new field are glad to see emotional issues finally taken seriously, some few fear EQ invites misuse.
1. The experiment with the four-year-olds makes it clear that ______ .A.the age of 4is a proper time for scientific experiment |
B.emotional intelligence won't show up until adolescence |
C.the ability of self-control plays a role in personal success |
D.candy can be used to measure a person's emotional intelligence |
A.The higher a person's EQ is, the higher his or her IQ is. |
B.The higher a person's IQ is, the lower his or her EQ is. |
C.A person's success totally depends on his or her EQ. |
D.Scientists have been trying to discover how EQ and IQ work together. |
A.kind | B.floating |
C.excited | D.optimistic |
A.Information about famous people with high EQ. |
B.Examples showing the opposite voice about EQ. |
C.Some reasons why EQ is a relatively new field. |
D.Strong demands for basic emotional education. |
【推荐2】Many people think that personal development is something they can't do.
A great way to help one's mood is to live in the here and now. The idea is similar to the idea in Eckhart Tolled The Power of Now. If you live in the present moment, you cannot ever possibly be in pain, because to know pain there has to be a past.
To help yourself, focus on helping others.
When you are trying to improve yourself, it is important to remember to focus on one thing at a time.
One of the most important things about self-improvement is to set achievable goals for yourself. Setting goals that are unreachable will only make you feel discouraged!
The information you just looked at should help you to feel more confident of your efforts to grow as an individual.
A.God helps those who help themselves. |
B.Pay attention to your attitudes towards others. |
C.If you try to improve several different aspects, you may lose control of all of them. |
D.But the truth is that everyone can help themselves personally develop. |
E.Sometimes finding a faith to devote oneself to is a great self-help idea. |
F.Keep a positive mindset(心态), and apply your chosen tips consistently. |
G.Being kind is always helpful to yourself. |
【推荐3】Adding math talk to story time at home is a winning factor for children's math achievement, according to a new research from the University of Chicago. The study from psychologists Sian Beilock and Susan Levine shows a marked increase in math achievement among children whose families used Bedtime Math, an iPad app that delivers engaging math story problems for parents and children to solve together.
Even children who used the app with their parents as little as once a week saw gains in math achievement by the end of the school year. The app's effect was especially strong for children whose parents tend to be anxious or uncomfortable with math.
Previous research from this group has demonstrated the importance of adults' attitudes about math for children's math success. For example, a recent study found that math-anxious parents who help their children with math homework actually weaken their children's math achievement.
The new findings demonstrate that structured, positive interactions around math at home can cut the link between parents' uneasiness about math and children's low math achievement.
"Many people experience high levels of anxiety when they have to solve a math problem, with a majority of adults feeling at least some worries about math," said Beilock, professor in Psychology and author of Choke, a book about stress and performance. "These math-anxious parents are probably less likely to talk about math at home, which affects how competent their children are in math. Bedtime Math encourages a dialogue between parents and kids about math, and offers a way to engage in high-quality math interactions in a low-effort, high-impact way."
Study participants included 587 first-grade students and their parents. Families were given an iPad installed with a version of the Bedtime Math app, with which parents and their children read stories and answer questions involving math, including topics like counting, shapes and problem-solving. A control group received a reading app that had similar stories without the math content and questions related to reading comprehension instead. Children's math achievement was assessed at the beginning and end of the school year. Parents completed a questionnaire about their nervousness with math.
The more times parents and children in the math group used the app, the higher children's achievement on a math assessment at the end of the school year. Indeed, children who frequently used the math app with their parents outperformed similar students in the reading group by almost three months in math achievement at year's end.
1. Bedtime Math is an iPad app that ________.A.requires parents and children to answer reading comprehension questions |
B.assesses children's math achievement and parents' nervousness with math |
C.encourages children together with their parents to solve math story problems |
D.teaches children how to count, recognize shapes and solve practical problems |
A.help from math-anxious parents improves children's math achievement |
B.interactions around math at home will cut off the family relationship |
C.children's math achievement is related to parents' attitude about math |
D.children can achieve more success if they see the importance of math |
A.it is the math problems related to the stories that make the great difference |
B.children whose parents are uneasy about math outperform other students |
C.children using the app for three months can see gains in math achievement |
D.the frequency of using the app has nothing to do with children's achievement |
A.High-anxiety parents influence children's attitude about math. |
B.Frequent use of app can develop problem- solving ability. |
C.Low-effort activities create good parent-child relationship. |
D.High-quality math interactions improve children's performance. |