人工智能深度学习课程

AI

Deep

Learning

ClassFrom

Mystery

to

Masterydef

sigmoid(z):

return

1.0/(1.0+np.exp(-z))Given:

Training

DataTask:

Learn

a

classification

functionLoss

OptimizationWe

v,ant

to

find

the

netwo水v1eigh飞小or

achievethe

lowest

loss1,

nw

=argmin-2L(f(x(i);w),y(i))w

n

i=1w,=

argmin](W)wRemember:w

=

{w(0),,w(1),···

}Loss

Optimizationw·

:=argmin](W)wRemember:Our

loss

is

a

function

ofthe

network

weigh囚丿(w。,W1)。。/飞．掌。W。W1。Loss

OptimizationTake

smalll

step

1n

o,pposite

d1irection

of

gradient＿＋J(w。,W1)。...I.．。W八W,1Gradient

DescentRepeat

until

convergence｀3一2-J(w。,W1)。一.2一03o.e

o,-

o;?·飞勹产～，W。°02W1Classification

ProblemHeuristic

Training/Test

Ratio

80/20Heuristic

Pareto

80/20Training

vs

Test

ErrorsNew

Model

with

more

input

dataNew

Model

more

NeuronsNew

Model

with

Noisy

DataImage

creating

a

Face

for

Siri

or

Alexa4/10/2369AI

Contributions

in

the

field

of

AeronauticsOverview4/10/2370Mission

Objectives:

Explore

use

of

asUAS

capability

at

an

aircraft

crashscene

to:Assist

Crash

and

Rescue

EffortsDefine

Crash

Area

–security

and

publicsafetyAssess

hazards

before

entryLocate

personnelVideo

document

the

siteIdentify/locate

objectsGPS

tag/inventory

individual

objectsEnable

management

and

EOC

effortsDetect/Classify

the

Black

BoxStream

video

to

AFRC

Edwardslocation20

MegapixelCameraArtificial

IntelligenceDeep

Neural

NetworkArchitectures4/10/237120

MegapixelCameraGoal:

Object

Detection

and

Classification

BoxBlackTraining

Data:

Over

120

Black

Box

images

(2D)

on

the

internetCNN

Model:

Yolo

detection

network

has

24

convolutional

layers

deep

followed

by

2fully

connectedlayers.----Black

Box----

Aircrafts----

PeopleAI

CNN

Detection

Accuracy72

Results:

YOLOv2predicts

(96%)

bounding

boxon

1080P

resolution

at

30FPSvideoat

low

altitudesNeural

Networks

for

Object

Detection

and

Tracking

(speed,

accuracy,

and

efficiency)Aircraft

Crash

MishapExercise4/10/2373Results:

Video

Uploaded

2.5

Mbps

at

30

FPS

~

3

second

lag

on

Live

Stream

Video

on

MiFiMission

Economics

based

on

the

hazardous

conditions

and

limited

time4.Accurac