1. Concepts
Singleton mode: it is designed to ensure that a class has only one instance and provides a global access point for it. This instance is shared by all program modules.
[Cpp]Class CSingleton{// Public static method to obtain the instancePublic:Static CSingleton * GetInstance (){If (m_pInstance = NULL) // determines whether the first call is successful.M_pInstance = new CSingleton ();Return m_pInstance;}// Private constructor to prevent instantiationPrivate:CSingleton (){};// Private St
very good extensibility.Example and source codeWe take a simple toy factory, for example, the factory produces children's toys, girls ' toys and boys ' toys, first write a Itoy abstract product interface used to define the basic behavior of the toy model, and then implement the interface to generate a few toys specific product class Childrentoy,mentoy and Womentoy class:Itoy.classpublicinterface IToy { /** * 名字 */ String getName(); /** * 价格 */ float price(); /**
If you see the Webcenter Space app (Webcenter.ear) from the WebLogic console, the session timeout (3,600 seconds) session timout is misleading and is not applicable in the case of webcenter space applications. If you update the value from the console, it does not affect the session time-out of the Webcenter space application. Then, the question is how can I change the Webcenter space app session timeout? The default session timeout in Web. XML is set to 45 minutes. There are two ways to change t
Sony PS VR device okay
Virtual Reality device PS VR for the price of 399 U.S. dollars, and officially sold in October this year, PS VR needs to be matched with PS4. PS VR uses a 5.7-inch OLED screen with a resolution of 1080P (Monocular 960x1080), the refresh rate supports 90Hz and 120Hz, the field angle is about 100 degrees, and the delay is less than 18 milliseconds.
Sony PS VR equipment how much money
Sony posted a PS VR price of 39
language (1-4):"
Select I in Perl php python shell exit
Todo
Case $i in
Perl) echo "I like Perl";;
php) echo "PHP is good";;
Python) echo "Xiangjun like Python";;
Shell) echo "Shell is my favourite";;
exit) exit;;
Esac
Done
[Root@vps tmp] $bash select.sh1) Perl2) PHP3) Python4) Shell5) ExitSelect a script language (1-4): 3Xiangjun like PythonSelect a script language (1-4):
It's changed, haha.
PS4: We debug the shell scr
*} ${[emailprotected]} variable name matching, matching variable names starting with prefix, output matching variable names: [emailprotected]:~# Echo ${! p*} PAT PATH pipestatus PPID PS1 PS2 PS4 PW PWD [emailprotected]:~# Echo ${[emailnbsp ;p rotected]} PAT PATH pipestatus PPID PS1 PS2 PS4 PW PWD [emailprotected]:~# ${!name[@]} ${!name[*]} The list of array keys. If the name is an array variable, it expands
Build a Samba Shared Server in Linux
Lab requirements:
Configure and access the Samba file sharing service, and configure the Access Users and corresponding permissions.
Tips: Create the shared directory/test and/share, and create the file tf1 (read-only) tf2 (read/write) under/test respectively. Create the file pf1 (read-only) under/share) and pf2 (read/write)
1. Mount the local yum Source
[Root @ localhost/] # mkdir/media/cdrom
[Root @ localhost/] #
variables, C:\Program files\nvidia GPU Computing toolkit\cuda\v8.0C:\Program Files\nvidia GPU Computing toolkit\cuda\v8.0\binC:\Program Files\nvidia GPU Computing toolkit\cuda\v8.0\bin\lib\x643: Install the CUDNN libraryDownload the CUDNN library using the link belowHttps://developer.nvidia.com/cudnnAfter downloading the decompression, in order to run the TensorFlow can also be loaded into the library, we want to copy the extracted files to CUDA corresponding folder C:\Program files\nvidia GPU
addition to the increase in the number of layers), but the increase in computational capacity is very much.The following two graphs show the output of the previous and subsequent iterations of the convolutional neural network, and it is found that the final convolutional neural network is close to 100% accuracy in the training set.The accuracy on the test set has also reached 98% to 99%, which provides about 2% more than a multilayer neural network.Report:The complete code is as follows:1 Impor
TFIDF is actually: TF * IDF,TF Word frequency (term Frequency), IDF reverse file frequencies (inverse document Frequency). TF represents the frequency at which the entry appears in document D. The main idea of IDF is that if the fewer documents that contain the entry T, that is, the smaller the n, the larger the IDF, the better the class-distinguishing ability of the term T.The main idea of TFIDF is that if a word or phrase appears in an article with a high frequency of TF and is seldom seen in
void Int_timer_tf2 (void) Interrupt 7 using 2{... source lines ...} There is keywords:Interrupt xDefines the interrupt number. This number tells compiler which vector address of you want. See also the manual "Cx51 Compiler User ' s guide-chapter 3 Language extensions-function declarations-interrupt functi Ons "on p. 125. Look at the table "Interrupt number" to "Adress"!using xdefines the desired register bank access for the interrupt function. in the example mentioned above, the function IN
From: http://hi.baidu.com/jrckkyy/blog/item/fa3d2e8257b7fdb86d8119be.html
TF/IDF (Term Frequency/inverse Document Frequency) is recognized as the most important invention in information retrieval.
1. TF/IDF describe the correlation between a single term and a specific document
Term Frequency: indicates the correlation between a term and a document.Formula: number of times this term appears in the document divided by the total number of times all the terms appear in the document.
IDF
Get File Path-(Nsstring *) getfilepath{2. Get the file path to be stored(1) obtain the documents folder pathNsdocumentdirectory is used to obtain the path of a specified folder.Nsuserdomainmask sets the domain to be searched. All our files are stored in the user domain.@ Param yes whether to use the detailed path (absolute path)@ Return because the method is applicable to Mac OS at first, and the computer system may have multiple users, so there may be multiple paths, so the return value type is
measure the relevance of Web pages and queries---information retrieval field * TF-IDF (Word frequency-inverse text rate index ) algorithm: * TF frequency = (number of occurrences of Word/total number of words in text) * Idf=log (D/DW) =log (total number of pages/pages containing specific words)----> Why is log (), the interpretation of mathematical beauty is "cross-entropy of the probability distribution of a keyword under a given condition" "* Relevance =tf1*idf1+
(' 1.pkl ', ' WB ')Pickle.dump (Group1,f1,true)F1.close ()#输出:#load (Object,file), the data recovery of the file stored in the dump ()F2=file (' 1.pkl ', ' RB ')T=pickle.load (F2) #读取f2Print TF2.close#输出:("Bajiu", "Wen", "Qingtian")Note: F2.close close file
6.Python Lines and indents
Understanding logical lines and physical lines:(1) Logical line: mainly refers to the number of lines in meaning of a piece of code(2) Physical line: Refer
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