polycom 2w

has been applied in many fields. In these applications, segmentation is a prerequisite for further analysis and recognition of images. The accuracy of segmentation directly affects the effectiveness of subsequent tasks. The selection of thresholds is a key technology in the image threshold segmentation method.The most inter-class variance method [5] proposed by Otsu in 1978 has been widely used for its simplicity, stability, and effectiveness. From the perspective of pattern recognition, the op

meaning of capitalization is used in the difference rule, and the meaning of its lowercase is used in the complexity of time.Finite automaton algorithm (fst,finite State transducer): Constructs a least-direction-free graph by entering an ordered string. By sharing the prefix to save space, memory holds the prefix index, and the disk holds the suffix word block. The specific implementation of Lucene can be seen in the source code.Lucene has so frequent version upgrades, I have been specialized i

used to save the first two calculations; This algorithm is reserved for the reader to implementExample Two: 01 knapsack problemThere are n weights and values of vectorinput: N =4weight=2, 1, 3, 2Value = 3, 2, 4, 2W=5Output =7think of one: we can use the exhaustive method to list all combinations of n items, from which to select the maximum value that meets the criteria:The use of exhaustive method, must be able to cite all the state, not heavy, and h

Nearly a year has not been in the blog Park to write things, from the company has been working hard to learn the company's framework and business. Now take over an e-commerce data statistics project, in the blog Park Search statistics Project Solutions but nothing, and finally design and continue to develop in the process of continuous updating, I hope to communicate with you.DemandThe project group's e-commerce system has been operating for more than 3 years, with a single daily order of about

to synchronize threads so that only one thread executes at any moment, and the Python thread is the native thread of the operating system. On Linux for pthread, on Windows for win thread, the execution of threads is fully dispatched by the operating system. A Python interpreter process has a main thread and the execution thread for multiple user programs. Multi-threaded parallel execution is prohibited even on multicore CPU platforms due to the existence of the Gil. A compromise solution to th

: Slower running speed Code cannot be encrypted Threads cannot use multi-CPU, that is, the multi-core advantage cannot be exploited code file format: xxx.pyPython interpreter: CPython: The most widely used interpreter IPython PyPy: Fast, using JIT to dynamically compile Python Jython IronPython Python developed from 2 to 3 the most important changes: 3 Unicode supportDownload Install: https://www.python.org/downloads/Configure the environment v

(Disclaimer: This article is for Linux users such as Ubuntu)Three modes used by VIM:1. General Instruction Mode2. Edit mode3. Instruction-column Command modeVim's easy steps to walk:Simple command: (I think it's better for beginners to put it in front)Ctrl+d Show all commands for the current initials (this works):!ls or:!dir View files that exist in the current directory: E Back to start directoryHelp user-manual don't know.Direction: H, J, K, L, left up and down right (or directly press the key

paste d DeleteWord movementW W move to the beginning of the next wordE e moves to the end of the next wordb b backwards to the beginning of the previous wordIt is important to note that E ignores punctuation, such as: I ' m,e will be two words, E won'tSimilarly, precede the command with a number that represents the number of executions, such as: 2w, to move 2 words downI may say a few more times at the beginning, because this technique is important.T

Edit command:I insert the word "a" before inserting a Line at the end of insert an O new line edit O Create a new row aboveInsert:X i * "ESC" insert 10 *25 a XX "ESC" insert 25 xxj join merge two rowsMove:4l Move right 4 characters 0 move to beginning of line^ Move to beginning $ move to end of line 2w move backward two words 3W backward Move three words (only by space)

, as follows: # lsof |grep/var/log/messagessyslogd 1283 root 2w REG 3,3 5381017 1773647/var/log/messages (deleted)from the above information you can see that the PID 1283 (syslogd) Open file has a file descriptor of 2. You can also see that/var/log/messages has been flagged for deletion. So we can view the corresponding information in/PROC/1283/FD/2 (each file descriptor for the process corresponding to a digitally named file under FD), as follows:# h

1. 光标在屏幕文本中的移动既可以用箭头键，也可以使用 hjkl 字母键。 h (左移) j (下行) k (上行) l (右移) 2. 欲进入 Vim 编辑器(从命令行提示符)，请输入：vim 文件名 1. 欲从当前光标删除至下一个单词，请输入：dw 2. 欲从当前光标删除至当前行末尾，请输入：d$ 3. 欲删除整行，请输入：dd 4. 欲重复一个动作，请在它前面加上一个数字：2w 5. 在正常模式下修改命令的格式是： operator [number] motion 其中： operator - 操作符，代表要做的事情，比如 d 代表删除 [number] - 可以附加的数字，代表动作重复的次数 motion - 动作，代表在所操作的文本上的移动，例如 w 代表单词(word)， $ 代表行末等等。 6. 欲移动光

/data/da Ta.1 (Deleted)Aliyundun 4170 Root 12w REG 202,1 614 3571/usr/local/aegis/aegis_update/data/da Ta.1 (Deleted)Alihids 12357 root 6w REG 202,1 1544 3595/usr/local/aegis/aegis_update/data/da Ta.1 (Deleted)Alihids 12357 root 12w REG 202,1 614 3571/usr/local/aegis/aegis_update/data/da Ta.1 (Deleted)Aliyundun 25564 root 6w REG 202,1 1544 3595/usr/local/aegis/aegis_update/data/da Ta.1 (Deleted)Aliyundun 25564 Root 12w REG 202,1 614 3571/usr/local/aegis/aegis_update/data/da Ta.1 (Deleted)Java 29

CommandPsView the process of the system[Email protected] ~]# Ps-aux[Email protected] ~]# ps-elfCommandNetstatView ports and connection status[[email protected] ~]# NETSTAT–LNP # View the ports on which the machine is open[[email protected] ~]# Netstat–an # View the status of native and other host connections[Email protected] ~]# netstat-an|grep119.29.186.209:80|grep-ic estab # See the number of concurrent, an nginx single-run static Web page can be 2w

process tree. When a file in the system is accidentally deleted, as long as there are processes in the system that are accessing the file, you can recover the file from the/proc directory by lsof Use lsof to see if there are currently processes open/var/logmessages files # lsof |grep/var/log/messages syslogd 1283 root 2w REG 3,3 5381017 1773647/var/log/messages (deleted) from/proc/128 3/FD/2 This method of recovering deleted files is useful

too much trouble for the development of colleagues.What about that? You brainwave, wrote a timer function ...Import timedef Timer (func): start = Time.time () func () print (Time.time ()-start) def func1 (): print (' In Func1 ') def func2 (): print (' in Func2 ') timer (func1) timer (FUNC2)Does that look a lot easier? No matter how many functions we write, we can call this timing function to calculate the execution time of the function ... Although the modification cost has becom

a printPrint ("xxx")two variables/strings(a) The role of variablesUsed to store things so that they can be called later(ii) The operation of variable definition 1 variablesname = "Tortoise Man"Print ("My name is", name)Name2 =namePrint ("My name is", name,name2)Name = "X"Print (name,name2)At this point, name! = name22 defined Rules Variable names can only be any combination of letters, numbers, or underscores The first letter of the variable name cannot be a number Python keywor

Daily Chicken Soup:I still have a 2w loan and I don't have to ...First, what is a functionFunctions are the encapsulation and definition of code and functionality.1. How to define a function1 def function name (): 2 function Body 3456# The naming convention for function names is the same as the naming convention for variables 7 # The function body is the code to execute after the function is executed2. How to call a functionThe function name can

. "Personally, I think you should look at your project needs, assuming you are 3d games. Your game needs to be compatible with low-configuration hardware, smooth operation, control hardware fever, but also to achieve a certain effect (lightmap+ fog effect), then the number of vertices must not be high. At this time the 2W vertex of the same screen I think is a more appropriate number, drawcall preferably less than 70. Another, control the heat please

The cursor can be moved in the screen text using the arrow keys, or the H J k L Letter KeyK (upstream) J (downlink) H (shift left) L (shift right)delete the cursor position character in normal mode, press Xin normal mode, insert or add text:I insert text before inserting text cursorA Add text line after add text: Wq Save changes and exit: q! Do not save and exitDW Deletes a word (the cursor is placed in the start out)d2w Delete Two wordsd$ at the end of the current line from the cursorDD Delete

that you can not make yourself a bother to tell all the development, and now you are in your original code to add a sentence to calculate the time?Import Timedef func1 (): print (' in func1 ') start = Time.time () func1 () print (Time.time ()-start)Or not, because this is too much trouble for the development of colleagues.What about that? You brainwave, wrote a timer function ...Import timedef Timer (func): start = Time.time () func () print (Time.time ()-start) def func1 (): pri