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Machine Learning in
Bioinformatics
b00901028 謝伊妍
b00901146 朱柏憲
b00901155 吳京達
Group 2
Google: Calico
IBM: Watson
Outline • Machine Learning Basics
• Machine Learning and Bioinformatics
• Example 1
• Example 2
• Conclusion
• Machine Learning Basics
• Machine Learning and Bioinformatics
• Example 1:
• Example 2:
• Conclusion
Outline
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x: area
: Parameters
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𝜃0 = 300 𝜃1 = 0
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𝜃0 = 100 𝜃1 = 0.1
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𝜃0 = 0 𝜃1 = 0.2
Cost Function:
Goal:
Cost Function
Gradient Descent
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
(for fixed , this is a function of x) (function of the parameters )
Why don’t we use Normal Equation?
Ans: Computation Time
Some common Machine Learning Algorithms
• K-neighbor
• Gradient Descent
• Neural Network
• etc.
Suggesting Course on Coursera:
1. Machine Learning
2. Neural Networks for Machine Learning
• Machine Learning Basics
• Machine Learning and Bioinformatics
• Example 1:
• Example 2:
• Conclusion
Outline
Figure from: Pedro Larranaga et al., “Machine learning in bioinformatics”
2005, BRIEFINGS IN BIOINFORMATICS Mag
1.Gene finding
2.Tumor detecting
3.Emotion recognition
4.…
• Machine Learning Basics
• Machine Learning and Bioinformatics
• Example 1:
• Example 2:
• Conclusion
Outline
Prediction of Individual Brain Maturity
Using fMRI
What is fMRI?
In This Research
• Algorithm: MVPA(multivariate pattern analysis) voxels based on GLM SVMs(support vector machines)
• Data: fcMRI data from 238 rs-fcMRI scans
SVM
• For a set Rd , trying to find a hyper-plane classify data as two groups
SVM
• H1 H2 : support hyper-planes
• Hyper-plane: WTX = - b (WTX + b = 0)
H1: wTx +b = +1
H2: wTx +b = −1
• H1 to plane: |1-b|/|w|
H2 to plane: |-1-b|/|w|
H1 to H2 : 2/|w|
SVM
• (wTxi) +b≧1 if yi=1 (wTxi) +b≧-1 if yi=-1
→ yi ((wTxi)+b)≧1
• min 1/2(wTw)
• cingulo-opercular 前扣帶迴
• fronto-parietal 額葉
• Sensorimotor 感覺神經
• Occipital 枕葉
• Cerebellum 小腦
Result and Future Work
• Prediction of Alzheimer ’ s disease
• Diagnosis & prognosis disordered brain function
Prediction of Individual Brain Maturity
Using fMRI
What is fMRI?
In This Research
• Algorithm: MVPA(multivariate pattern analysis) voxels based on GLM SVMs(support vector machines)
• Data: fcMRI data from 238 rs-fcMRI scans
SVM
• For a set Rd , trying to find a hyper-plane classify data as two groups
SVM
• H1 H2 : support hyper-planes
• Hyper-plane: WTX = - b
H1: wTx +b = +1
H2: wTx +b = −1
• H1 to plane: |1-b| /|w|
H2 to plane: |-1-b| /|w|
H1 to H2 : 2/|w|
SVM
• (wTxi) +b≧1 if yi=1 (wTxi) +b≦-1 if yi=-1
→ yi ((wTxi)+b)≧1
• min:1/2 * (wTw)
• cingulo-opercular 前扣帶迴
• fronto-parietal 額葉
• Sensorimotor 感覺神經
• Occipital 枕葉
• Cerebellum 小腦
Result and Future Work
• Prediction of Alzheimer ’ s disease
• Diagnosis & prognosis disordered brain function
• Machine Learning Basics
• Machine Learning and Bioinformatics
• Example 1:
• Example 2:
• Conclusion
Outline
Emotion Recognition
Physiological Signals
• Communication channels
• Verbal and Non-verbal
• Heterogeneity
• Pattern recognition
• Feature extraction
Physiological Signals
• Electrocardiogram (ECG):heart rate
(R-R interval, heart rate variability)
• Electromyogram (EMG):correlation between cognitive emotion and physiological reactions
• Skin conductivity (SC):robust and well studied, affected by general mood and immediate emotional response.
• Respiration changes (RSP):breathing depth, rate of respiration
Emotional Model
Classification
Hilbert Huang Transform (HHT)
Classification Results
• Machine Learning Basics
• Machine Learning and Bioinformatics
• Example 1:
• Example 2:
• Conclusion
Outline