What makes WiFi faster at home than at a coffee shop? How does Google order its search results from the trillions of webpages on the Internet? Why does Verizon charge $15 for every GB of data we use? Is it really true that we are connected in six social steps or less?
网络运作：无需微积分的原理简介
普林斯顿大学课程信息
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初级
完成时间大约为24 小时
英语（English）
字幕：英语（English）
100% 在线
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初级
完成时间大约为24 小时
英语（English）
字幕：英语（English）
提供方
普林斯顿大学
Princeton University is a private research university located in Princeton, New Jersey, United States. It is one of the eight universities of the Ivy League, and one of the nine Colonial Colleges founded before the American Revolution.
教学大纲 - 您将从这门课程中学到什么
完成时间为 1 小时
Introduction
An introduction to what this course is about: the fundamentals behind social and technical networks.
完成时间为 1 小时
5 个视频 （总计 39 分钟）, 3 个阅读材料
5 个视频
Sharing Is Hard & Ranking is Hard8分钟
Crowds Are Wise & Crowds Are Not So Wise7分钟
Network Is Expensive & Divide and Conquer7分钟
End to End & Bigger And Bigger8分钟
3 个阅读材料
About Us10分钟
Suggested Readings and Links10分钟
Keep in Touch10分钟
完成时间为 3 小时
Power Control in Cellular Networks
How is it possible that we can all communicate effectively without disrupting each other's calls, messages, or Internet usage? In this lesson, we will take a look at some of the methods that have been developed for letting us "share" the air over which our phones communicate.
完成时间为 3 小时
21 个视频 （总计 125 分钟）, 1 个阅读材料, 1 个测验
21 个视频
Multiple Access6分钟
FDMA8分钟
0G4分钟
Attenuation5分钟
Cells & 1G9分钟
2G3分钟
TDMA4分钟
CDMA8分钟
Cocktail Party Analogy4分钟
Near-far Problem8分钟
SIR5分钟
DPC7分钟
DPC Computation: Part A11分钟
Negative Feedback3分钟
DPC Computation: Part B 7分钟
Convergence3分钟
Distributed Computation3分钟
Handoffs3分钟
CDMA & 3G5分钟
Summary2分钟
1 个阅读材料
Power of Networks10分钟
1 个练习
Problem Set #130分钟
完成时间为 2 小时
Random Access in Wifi Networks
In this lesson, we will investigate WiFi, another type of wireless network. Rather than having stringent power control algorithms as we saw for cellular, WiFi relies on "random access" methods to manage interference among users in the same location.
完成时间为 2 小时
15 个视频 （总计 98 分钟）, 1 个阅读材料
15 个视频
Traffic Analogy4分钟
WiFi Standards5分钟
WiFi Deployment6分钟
Accessing WiFi10分钟
Interference7分钟
Controlled vs. Random Access6分钟
Random Access Protocols & ALOHA7分钟
ALOHA Successful Transmission5分钟
ALOHA Throughput7分钟
ALOHA Inscalability8分钟
CSMA Carrier Sensing5分钟
CSMA Backoff7分钟
CSMA vs. ALOHA5分钟
Summary3分钟
1 个阅读材料
Power of Networks
完成时间为 2 小时
PageRank by Google
In this lesson, we will take a look at PageRank, Google's famous algorithm for ordering the results on its search page. PageRank is a prime example of how coming up with the right "ranking" of a set of items is a difficult yet important question in networking.
完成时间为 2 小时
11 个视频 （总计 67 分钟）, 1 个阅读材料, 1 个测验
11 个视频
Search Engines7分钟
Webgraphs8分钟
In-degree3分钟
The "Random Surfer"7分钟
Importance Equations5分钟
PageRank Example Calculation10分钟
PageRank Example Summary5分钟
Dangling Nodes & Disconnected Graph6分钟
Robust Ranking3分钟
Summary3分钟
1 个阅读材料
Power of Networks
1 个练习
Problem Set #230分钟
完成时间为 1 小时
Product Rating on Amazon
The decision of whether or not to purchase something online is often driven by the ratings that previous customers have left for it. In this lesson, we will take a look at Amazon's review system, and the see how "crowds are wise" is another important networking principle.
完成时间为 1 小时
11 个视频 （总计 69 分钟）, 1 个阅读材料
11 个视频
Average Ratings10分钟
The Wisdom of Crowds10分钟
Rating Aggregation Challenges4分钟
Naive Averaging5分钟
Bayesian Ranking: Part I5分钟
Bayesian Ranking: Part II9分钟
Bayesian Ranking in Practice5分钟
What does Amazon do? Part I5分钟
What does Amazon do? Part II5分钟
Summary3分钟
1 个阅读材料
Power of Networks
完成时间为 2 小时
Movie Recommendation on Netflix
One of the perks of having a Netflix subscription is getting recommendations of movies to watch. Behind the scenes, Netflix uses powerful algorithms to determine which will be suggested to each person specifically. In this lesson, we will take a look at the main ideas behind these algorithms.
完成时间为 2 小时
18 个视频 （总计 111 分钟）, 1 个阅读材料, 1 个测验
18 个视频
Video Streaming5分钟
Recommendation is Everywhere3分钟
Netflix Recommendation System5分钟
Netflix Prize: Logistics7分钟
Netflix Prize: The Competition4分钟
Our Example3分钟
Raw Average7分钟
User-movie Interactions7分钟
Baseline Predictor6分钟
Similarity4分钟
Cosine Similarity9分钟
Similarity Values10分钟
Leveraging Similarity8分钟
Neighborhood Predictor4分钟
Performance of Different Methods3分钟
Summary3分钟
Copy of Cosine Similarity9分钟
1 个阅读材料
Power of Networks
1 个练习
Problem Set #330分钟
完成时间为 2 小时
Midterm
完成时间为 2 小时
1 个练习
Midterm2小时
审阅
来自网络运作：无需微积分的原理简介的热门评论
由 PP 提供Jul 3, 2019
Using themes and analogies, this course successfully give a holistic view. You lose a bit on mathematical precision, but gain on a firmer understanding of the phenomena.
由 GG 提供Feb 14, 2017
Very clear explanation. A simple approach that helps to understand most of the concepts reviewed.\n\nThanks.
常见问题
我什么时候能够访问课程视频和作业？
Access to lectures and assignments depends on your type of enrollment. If you take a course in audit mode, you will be able to see most course materials for free. To access graded assignments and to earn a Certificate, you will need to purchase the Certificate experience, during or after your audit. If you don't see the audit option:
- The course may not offer an audit option. You can try a Free Trial instead, or apply for Financial Aid.
- The course may offer 'Full Course, No Certificate' instead. This option lets you see all course materials, submit required assessments, and get a final grade. This also means that you will not be able to purchase a Certificate experience.
Can I earn a certificate in this course?
No. As per Princeton University policy, no certificates, credentials, or reports are awarded in connection with this course.
完成课程后，我会获得大学学分吗？
此课程不提供大学学分，但部分大学可能会选择接受课程证书作为学分。查看您的合作院校，了解详情。Coursera 上的在线学位和 Mastertrack™ 证书提供获得大学学分的机会。
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