import?numpy?as?np

def?sigmoid（x）:
????“““
????Compute?the?sigmoid?of?x

????Arguments:
????x?--?A?scalar?or?numpy?array?of?any?size.

????Return:
????s?--?sigmoid（x）
????“““
????s?=?1/（1+np.exp（-x））
????return?s

def?relu（x）:
????“““
????Compute?the?relu?of?x

????Arguments:
????x?--?A?scalar?or?numpy?array?of?any?size.

????Return:
????s?--?relu（x）
????“““
????s?=?np.maximum（0x）
????
????return?s

def?dictionary_to_vector（parameters）:
????“““
????Roll?all?our?parameters?dictionary?into?a?single?vector?satisfying?our?specific?required?shape.
????“““
????keys?=?[]
????count?=?0
????for?key?in?[“W1“?“b1“?“W2“?“b2“?“W3“?“b3“]:
????????
????????#?flatten?parameter
????????new_vector?=?np.reshape（parameters[key]?（-11））
????????keys?=?keys?+?[key]*new_vector.shape[0]
????????
????????if?count?==?0:
????????????theta?=?new_vector
????????else:
????????????theta?=?np.concatenate（（theta?new_vector）?axis=0）
????????count?=?count?+?1

????return?theta?keys

def?vector_to_dictionary（theta）:
????“““
????Unroll?all?our?parameters?dictionary?from?a?single?vector?satisfying?our?specific?required?shape.
????“““
????parameters?=?{}
????parameters[“W1“]?=?theta[:20].reshape（（54））
????parameters[“b1“]?=?theta[20:25].reshape（（51））
????parameters[“W2“]?=?theta[25:40].reshape（（35））
????parameters[“b2“]?=?theta[40:43].reshape（（31））
????parameters[“W3“]?=?theta[43:46].reshape（（13））
????parameters[“b3“]?=?theta[46:47].reshape（（11））

????return?parameters

def?gradients_to_vector（gradients）:
????“““
????Roll?all?our?gradients?dictionary?into?a?single?vector?satisfying?our?specific?required?shape.
????“““
????
????count?=?0
????for?key?in?[“dW1“?“db1“?“dW2“?“db2“?“dW3“?“db3“]:
????????#?flatten?parameter
????????new_vector?=?np.reshape（gradients[key]?（-11））
????????
????????if?count?==?0:
????????????theta?=?new_vector
????????else:
????????????theta?=?np.concatenate（（theta?new_vector）?axis=0）
????????count?=?count?+?1

????return?theta

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

????.......??????9193??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Practical-aspects-of-Deep-Learning.ipynb

?????文件??????28519??2018-07-24?11:29??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\.ipynb_checkpoints\Gradient+Checking-checkpoint.ipynb

????.......??????1970??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\gc_utils.py

?????文件??????28397??2018-07-24?11:47??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\Gradient+Checking.ipynb

????.......????177586??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\images\1Dgrad_kiank.png

????.......????124698??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\images\dictionary_to_vector.png

????.......???1755459??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\images\handbackward_kiank.png

????.......???2246535??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\images\handforward_kiank.png

????.......????180602??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\images\NDgrad_kiank.png

????.......???????521??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\testCases.py

?????文件???????2280??2018-07-24?11:27??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\__pycache__\gc_utils.cpython-36.pyc

?????文件????????708??2018-07-24?11:27??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Gradient?Checking\__pycache__\testCases.cpython-36.pyc

?????文件?????256273??2018-07-24?11:27??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Initialization\.ipynb_checkpoints\Initialization-checkpoint.ipynb

?????文件?????256273??2018-07-24?11:27??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Initialization\Initialization.ipynb

?????文件???????7711??2018-07-24?10:39??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Initialization\init_utils.py

?????文件???????7232??2018-07-24?10:40??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Initialization\__pycache__\init_utils.cpython-36.pyc

?????文件?????236268??2018-07-24?10:50??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\.ipynb_checkpoints\Regularization-checkpoint.ipynb

????.......??????6038??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\datasets\data.mat

????.......????616958??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\datasets\test_catvnoncat.h5

????.......???2572022??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\datasets\train_catvnoncat.h5

????.......???1714401??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\images\dropout1_kiank.mp4

????.......???2461616??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\images\dropout2_kiank.mp4

????.......????123636??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\images\field_kiank.png

?????文件?????267447??2018-07-24?14:54??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\Regularization.ipynb

?????文件??????10755??2018-07-24?10:57??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\reg_utils.py

????.......??????4370??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\testCases.py

?????文件???????9800??2018-07-24?10:57??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\__pycache__\reg_utils.cpython-36.pyc

?????文件???????3976??2018-07-24?10:48??02-Improving-Deep-Neural-Networks\week1\Programming-Assignments\Regularization\__pycache__\testCases.cpython-36.pyc

????.......????146556??2017-08-28?03:55??02-Improving-Deep-Neural-Networks\week1\quiz.pdf

?????文件???????6993??2018-07-25?18:58??02-Improving-Deep-Neural-Networks\week2\.ipynb_checkpoints\optimization-algoritihms-checkpoint.ipynb

............此處省略63個(gè)文件信息