Ep92: How to Start with Deep Learning | 吴恩达:AI创业的机会不在技术层面-YyatTung

Ep92: How to Start with Deep Learning | 吴恩达:AI创业的机会不在技术层面

歌手:YyatTung

时间:2024-12-02

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喔耶耶耶喔

Okay

So you're thinking about uh getting into the world of deep learning

Maybe definitely a hot topic

Right now yeah

And maybe even looking at it as a career for sure

Well you come to the right place

Absolutely today we are bringing you the essential advice on how to get started and thrive deep leararexactly today for

For deep ep ve ve we've been looking closely at a conversation with entering a true pioneer in the field

Death ony from this clip on the next friddman ai podcast

We've been ststracting the most valuable invice for you guys

Ys exactly the learning pass the core concept things

You really need to know and even how to approach building a career

It's a dynamic space

So you got another moves

Yes

So the the mission today is to cut through all the noise and give you a clear actionable road map

I like it

We want you to walk away

Knowing exactly how to begin your deep learning adventure

What to focus on first and how to see your long term growth in this field very cool and feel in power to art art

You don't need a fphd or anything

That's a relief

Okay

So you wait a jumin

Where does andrew nangg suggest someone even begin so a really interesting starting point

He brings up is his own machine learning course

On course sarah

And it's really amazing how many people who are now active and ai point back to this course as their initial spark their foundation

Yeah

Seems to be a very very pivoal experience for a lot of people

Also that's lot sense se so that's kind of a general machine learning course

Yeah

What deep learning specifically so so that he really adadvocates for the deep learning specialization

Which is also on course serah

Ah cool

And this program is designed to give you a deep understanding of neural networks

I like it from the basic building block right to sopisticated architectures

Like you've probably heard of cnns

Convolutional neural networks

Rns

Recurrent neural networks

Of course

Sequence models

Attention models

It's all there

So it's sentainly

This is really ththrow hands on experience in those technologies

Yes

Definitely the ones that power

Image recognition and natural language processing absolutely those are some of the big ones

What's the core aim in his view

是的 对的

The main goal is to go beyond theoreticical understanding

It's structured

So learners can actually implement these algorithms right and use them effectively from the very beginning

That's great

I mean so many times i see people you know learning something yeah

But they never actually put into practice

It into speciactice

Yeah Yeah

That's what's great about the specialization as you can you learn the theory

But also you get the skills

Get the skills or love it

So now for someone i ying the specialization

What kind of background do they need right to succeed right you know

Realistically

Realistically

Do we need to go back to calculus textbooks

Luckily No

Not at all okso for programming just basic understanding is necessary okay

Primarily because the exercises are done in python

Right that's for the math and eggest school level l good enough to get started okay

So no

That's nothing too crazy

Nothing too crazy

But he does highlight basic linear algebra especially understanding nothing to multiple fly matuses can be very beneficial

I see that makes sense kind of the language of deep learning

So basbasic

Ultro sumppie

That

That's great

That prepretty low berriored entry

It is now when someone dives in especially through the specialization

Yeah

What are some of the foundational concepts that run into early on the specialization really zero in on the fundamental building blocks of neural networks

Okay

How to build them from a single unit to multiple interconnected layers

Yeah

Understanding those different activation functions is also really key to what exactly are those activation functions again

So think of them as the decision makers within a neural network

That they allow the network to learn those complex nonlinear patterns

Ok

That go beyond simple linear relationships in the data i see

And that's the beauty of them

They introduced the complexity

That allows these networks to solve those really tricky problems i see

So like they're making decisions based on what they see in the data exactly and deciding what information to pass on to the next layer got it

So it's about understanding the core components yes

How they fit together yes

But it's not all just theory right no definitely not nans emphasize the practical side of things

Absolutely a big part of the deep learning specialization is getting these models to work in the real world

Okay

You understanding those little nuances between different optimization algorithms right those are the ones is fine to in the learning process

Exactly

And then also identifying and addressing overfitting okay

So what's over fitting again

Basically

It's when modeting model memorizes the training data too well okay

And then does poorly on new unseen data i see

Kind of like if you just memorize the answers to practice questions without understanding the concept right

You wouldn't do well on the real tax

Exactly you can say overfitting is a common pitfoall

For sure

What other practical skills does the specialization teach so knowing when to get more data

And when it's not onna help you and points out that some people spend months chasing more data

When the real problem is somewhere else right it's not always the solution

Exactly

And it also teaches you how to modify the network's architecture okso so how to cture ture those layers

We talked about

Exactly that to improve performance

So it sounds like it really equipped you not just with knowledge

But with the ability to trouble shoot in iterate on your models

For sure

It's all about getting those practical skills

I like it

He also touched on something that i found interesting

是的 对的

Getting your hands dirty with actual networks

Yes

He's a big advocate for that

But was his advice on it

He says dive right iting an experiment

Wehave train them on small datasets

Run inference to see what they predict just play around

Yeah

Building in into it to get get feel for it

Exactly

Yeah

He cautions tions agast spending months on large abstract projects

Before you really abstract the basic i see you need hands on experience with the fundundamental absolute help soludify the understanding for sure

Yeah

So learn by doing and ststart small i like it

He also made it interesting comparison to programming

Oh Yeah

Knowing the syntax vers understanding the structure of code

Right how does that apply to deep learning so in programming

Knowing how to right lines of code

The syntax is just one part of the picde

The understanding how to organize those lines into coherent systems is coqually important

Right if not more sell i make sense

It's the same with machine learning

Ok

It's not just about the deep learning

Syntacx is not you know how to write the code to define a neural network

It's about understanding the entire process of building training and evaluating a model

Effectively so the big picture

The big picture yeah you know had to structure the data

Choose the right architecture debug the learning process absolutely all of that

And i imagine debugging in machine learning is a different beast than traditional software debugging

Oh

For sure

In traditional software you might be looking for a misplaced semiccalin or a logical error

But in machine learning you're often trying to figure out why a model isn't learning or why it's not improving

I say so you're looking at things like do you have enough data is your model overfitting

Did you choose the right optimization strategy those are important questions

They are an ygg really emphasize that those who can debug those kinds of issues in machine learning are super valuable right

Because it's not always straighforward

Yeah

It's a whole different way of thinking

Yeah

He also mentioned that deep learning is like learning math in that concepts build on each other

Yeah he makes that comparison for a reason

Why is that significant

对对对对对

Well if you miss a foundational concept in math

It makes it so much harder to understand later more advanced ideas

Right

That's a domino effect exactly

Training

Training foundation exactly

So if you don't understand basic

Basic algebra trigometry will be a struggle make sense

So if deep learning

If you don't understand how gradient descent works

Which is a key optimization algm

So then understanding more complex architectures or advanced training techniques will be really difficult

Which is delelearstanberation design to address that it is

It breaks down complex concepts into smaller digestiable modules

So so get get sosod underunderstanding each each stage before moving on so all about building that foundation layer by layer exactly brick by omke

No

He talked about oho moments in the learning process

Yes

Those light buld momoment what really did up for him

So he found that reinforcement learning especially seeing deeper reinforcement learning in action is really inspiring

Okay

Specially ally fleners so for this work from the

You can use a quick cap of what reinforcement learning is all about sure

So it's basically where an agent learns to make decisions by interacting with an environment

Yeah

And getting rewards or penalties got it so imagine a neural network learning to play a game or control a robot from scratch

I see witnessing that can be a real law moment

Yeah

You can really see the potential

Exactly

It igninites that interest it deepens the understanding

Now we also talk about the current real world applications of reinforcement learning

Yes

And this is important

Right it's grateful leararyeah

And has some successing game egg points out that it doesn't have as many widespread and packful applications outside of games

Ok

Compared to other areas of deep learning

Like supervised learning

Supervised learning being where you train models on label data

Exactly

And that's behind so many of the ai applications we use every day right so reinforcement learning is still a vital part of ai of course

But it's not necessarily the most immediately applicable skill for everyone

One that's a really important point

I think a lot of people get really excited about reinforcement learning they do

But it's good to have that balance prospective

Absolutely

He also pointed out the deep learning isn't the only tool in the ai tool box

Yes

That's very true

What else do

Ai professionals use use effective aa teams use a variety of tools depending on the problem

So things like statistical methods right dimensionality reduction techniques like pca principle component analysis right graphical models for relationships tween variables

Even knowledge graphs for organizing information

So it's really about having that broad skill set

It is to choose the right tool for the job

Exactly not just trying to fit deep learning into every situation

Right some problems are better suit for other methods

No

For someone taking the deep learning specialization

Owhat's the time commitment like so officially

It's about sixteen weeks

Which is roughly months okay

But it's self paced so some people might finish it faster

Exactly if they dedicate more time

They could finish it in a month or even less

That's great

And he also mention ed financial ate is available

Yes for those who need it

Which is it makes it accessible to a wider audience

Absolutely beyond that structured learning environment

What advice did he gave for learning consistently in such a demanding field

He really emphasized reguctive building a consistent routine

Even if it's just for short perioeach each day weethink it's like conlening ning easier er more effective

I like

Like that like

Like brushing your teeth

Once you make a hahabit

You do withwithout inking like aa create analogy

That's a consistent effort is what leads to real progress

Not those sporaditic bursts of work

Exactly

He also shared a specific study technique that he finds helpful

Yes

He's a big fan of handwritten notes interesting

Why is that because it forces you to slow down and rephrase the information in your own words ok

Which actually helps you retain it better in your long run

So it's not just about transcribing word for word

No

It's about actively engaging with the material

Summarizing it and making it your own i see

It's about that deeper level of processing exact

So it's not just about how much time you spend learning

But how you engage with the material absolutely quality of equality

Now that shift gears and talk about building a career in deep learning

That's good

Where should someone whose grasp the basics through a course

Like this specialization start their professional journey

Angg says

Strstrong ounoundation through course work like this aa way to ststart kay

It helps you master the fundamentals and break into the field

And this is even true for those interested in research

Yes

Even then having that solid base is incredibly beneficial

So beyond course work

What else is important

Gaining practical experience through personal projects is key

Okay and staying current by reading blogs in research paper

Right

The field is always evovy actly

So you have to keep up with the latest advancements

He also talked about the importance of starting small yes

Both for individuals and organizations

Why is them starting with smaller well defined projects

Allows you to build your skills and intuition

Without getting overwhelmed i see

So you can get those quick wins and build confidence

Exactly

And then you can iterate and learn from those experiences before moving on to bigger thing right you don't want to buy ite off more than can can w now for those who might be thing

You are going into research

Yeah

What are ang's thoughts on pursuing a phd

对的对的

So he says it's not strictly necessary to make significant contributions to the field interesting

Well it's essential for becoming a professor at a top university right

There are other ths in industry research and start tups

Where you can have a real impact without of phd

So it really depends on your individual goals

It does what specific career pass did he highlight

So he mentioned working for large tech companies

Okay

Joing ing seararch groups within those companies

I say going the academic out as a specifiss so researcher right or launchching your own ai ststup the excciting

It is and eemphasize that each path offers unique opportunities right

But maybe the most interesting advice gave wasn't about more specific role or company

That's true

What was that key take away

He stressed that the people you work with everyday are so important

Okay much more important than the company itme or whether you're an academia or industry interesting

So it's not just about the work itself no

It's about the environment

And the people you're surround

What did he specifically recommend

He said to look for great managers who can mentor you and talented supportive peers who you can learn from that makes a lot of sense

And he even suggested asking about your manager and team during the interview process

So finding out who you'll be working with is crucial absolutely

Because that can make or break your experience

It's all about those daily interactions in the support you receive exactly those things really influence your growth and your career satisfaction and having colleagues

Who challenge and support you accelerates your learning

For sure

It's all about that collaborative leararenvironment so to rap things

Things for your listeners

The key message from andrew hang is that starting your deep learning journey is more accessible than you might think yeah

It's not as daunting as it seems right

It's about taking advantage of resources like the deep learning specialization and committing to consistent effort putting in the work

Yeah

And always focusing on practical application

Through hands on projects learn by doing

Exactly

And even with a basic understanding of math and programming

You can build a solid foundation

That's encouraging it is in remember the journey involves both understanding the concepts and developing those practical skills

Debugging

Refining your models all part of the process and that key point he made about the people you work with yeah

That was really insighttful sugggest that your colleagues and the learning environment they create can be just as important as the technology itself maybe even more so as you think about this

What aspects of deep learning are you most curious about yeah

What excites here what kind of projects

Could you start to build

Put your skills

And how can you integrate those consistent learning habits into your routine

And finally a thought provoking question to leave you with i like get if the people around you are so crucial to your career growth right

How will you find and cultivate those valuable connections as you dive in to deep learning

That's a great question to ponder as you take your next steps

It is yeah feeling

Thanks for joining us for this deep dive into deep learning

It's been fine

It has and be sure to tune next time for more insights and explorations

See the febby

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