Note: Organize the PPT from shiming teacherContent Summary
1 Development History2 Feedforward Network (single layer perceptron, multilayer perceptron, radial basis function network RBF) 3 Feedback Network (Hopfield network,Lenovo Storage Network, SOM,Boltzman and restricted Boltzmann machine rbm,dbn,cnn)Development History
single-layer perceptron
1 Basic model2 If the excitation function is linear, the least squares can be calculated directly 3 if the excitation function is sif
-layer Perception (MLP): Multilayer perceptron is used to solve the problem of nonlinear classification of Single-layer neural networks, and the popular method of training multilayer perceptron is to reverse propagate, through which multiple inputs can produce a single output to achieve the result of classification.
Function prototype: Cv2. Ann_mlp.train (inputs, outputs, sampleweights[, sampleidx[, params[, flags]])
Procedures and Notes:
#decoding:
Preface
I have been dealing with neural networks (ANN) for a long time. I used to learn the principles. I have done a BPN exercise. I have not summarized it systematically. I recently read the torch source code, I have a better understanding of MLP, and I have made a summary by writing what I learned!Features of ANN
(1) high concurrency
Artificial Neural Networks are made up of many parallel combinations of the same simple processing unit. Although ea
combined by multiple sensors:
Nonlinear classification plane, where θ (·) represents a step function or symbol function.
Multi-layer sensor Neural Network
In fact, the above model isMulti-layer sensor Neural Network (multi-layer perceptron neural networks, MLP neural netwoks). Each node in the neural network is a sensor. The basic function of neurons in the model bio-neural network is that electrical signals from the outside (environment or o
=Datetime.datetime.now ()Print("Time Cost :") Print(Tend-tstart)Analysis:1. Forward Propagation: for in range (1, Len (synapselist), 1): Synapselist is a weight matrix.2. Reverse propagationA. Calculating the error of the output of the hidden layer on the inputdef GETW (Synapse, Delta): = [] # traverse the hidden layer each hidden unit to each output weight, such as 8 hidden units, each hidden unit two output each has 2 weights for in Range (Synapse.shape
1:set Collection (understanding)(1) Features of Set setUnordered, unique(2) HashSet collection (master)A: The underlying data structure is a hash table (is an array of elements as linked lists)B: Hash table bottom-dependent two methods: Hashcode () and Equals ()Execution orderFirst, compare whether the hash value is the sameSame: Continue to execute equals () methodReturns true: The element is duplicated, n
Collection interface of collection framework, Collection framework
The Root Interface in the Collection hierarchy. Collection represents a group of objects, also known as collection elements. Some collections allow repeated el
1. Basic functional testing of the collection collection:1 Packagecn.itcast_01;2 3 Importjava.util.ArrayList;4 Importjava.util.Collection;5 6 /*7 * The origin of the collection:8 * We are learning object-oriented language, and object-oriented language description of things is through the object, in order to facilitate the operation of multiple objects, we have t
Garbage collection and several common garbage collection algorithms and several garbage collection algorithmsPreface:
First, think about three things that need to be done by Garbage Collection (GC ).
1) What memory needs to be recycled?
2) When will it be recycled?
3) How to recycle it?
The previous blog mentioned vari
First, Introduction the Java Collection Framework, like the IO framework, it seems so complicated. system Framework, but once you drill down into the usage of each set, you can clearly see the difference between them and their relationship. Finally, a frame diagram is presented at a glance. Since the Java collection frame is divided into two major systems collection
packagecn.itcast_01;importjava.util.arraylist;importjava.util.collection;/** Booleanaddall (COLLECTIONNBSP;C): Adds an element of a collection *booleanremoveall (collectionc): Removes the element of a collection (is one or all) *booleancontainsall (COLLECTIONNBSP;C): Determines whether the collection contains the specified co
1. Remove duplicate string elements from the ArrayList collection (same string content)Analysis:(1) Creating a Collection Object(2) Adding multiple string elements (containing duplicates)(3) Create a new collection(4) Iterate through the old collection to get each element(5) Take an element to the new set and look for
Java Virtual Machine garbage collection (ii) garbage collection algorithm
mark-Purge algorithm replication algorithm mark-Collation algorithm generation collection algorithm train algorithm
In the Java Virtual Machine garbage collection (i) basics, learn how to determine whether an object is alive or dead. This paper
1. Overview of the Map collection:1 Public Interface MapAs a student, is based on the number to distinguish between different students, then assume that I now know the student's number, I have to according to the number to obtain the student's name, how to do it?If we use the previously explained set, we can only use the number and student name as a member of an object, and then store the entire object, in the future, when the traversal, judge, get t
The first thing to say is garbage, what's the name garbage?All is garbage, also first,second, I am not against who, everyone here is rubbish!!!HotSpotWTF, hot pots? What about my grandmother's heat, heat,you know?In short, the hotspot is a Java virtual machine to follow the specification of a realization, it was not sun company, but another company, was later acquired by Sun, anyway, is now Oracle, Oracle said, do not Rob, are mine.Garbage collectorThe concept of garbage
1. Stack: Stack, advanced out, one assignment, one value, in order.. Count takes the number of elements in the collectionThe. push () pushes the element one by one into the collection using the//stack collection. Push ()Pop () pops a collection of elements. Clear () empties the collectionNew Stack (); // first deposit and then take out S.push (1);
Java Collection comparison ---- collection, java ---- Collection
I have never figured out the differences between various java collections before, so I will combine them here for comparison.
Collection and Map
All java collections come from one of the Collection and Map inte
The methods in java collection _ collection are embodied through Arraylist, And the java collection arraylist
Import java. util .*;/*Collection defines the common functions of the Collection framework.1. AddAdd (e );AddAll (collection
Steps to use for the collection:(1) Creating a Collection Object(2) Creating an Element object(3) Adding elements to the collection(4) Traversing the collection:• Get an Iterator object from a collection object• Determine if there are elements through the Hasnext () method o
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