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current in the corresponding winding, the electric motor's synthetic magnetic potential only rotates part of the step angle. When subdivided driving, the winding current is not a square wave but a step wave, and the rated current is a step type input or removal. For example, if the current is divided into n steps, it takes n times for the rotor to turn a step angle, that is, n subdivision, as shown in Figure 5. The general subdivision method only changes the current of one phase, and the curre
; xtrabackup -- defaults-file =/etc/my. cnf -- prepare -- target-dir =/backup/xtrabackup delete a database Data files in the directory: shell> rm-rf/usr/local/mysql/var/ib * Shell> cp/backup/xtrabackup/ib */usr/local/mysql/varShell> chown-R mysql. root/usr/local/mysql/var restart to test whether the recovery is successful. Note that xtrabackup only backs up data files and does not back up the data table str
What the hell is an RDMA? It is believed that most children who do not care about high-performance networks do not know much. But the advent of nvme over fabrics let the storage have to take time to look at this thing, this article will introduce the RDMA I know.RDMA (Remote Direct memory access) is intended to directly access the host's memory at the remote, without the need for host involvement . For example, when both the host and client are equipped with RDMA NICs, the data is transferred di
In the process of developing the view will certainly encounter in the end is the use of pure code or Xib or storyboard, this is an experience, not a certain experience of the person can not be seen at the first sight, even if the first can be seen in the later maintenance will also exist more or less problems, So my idea is that unless there are some things that are impossible to change, such as logging in, registering, and so on, or a few controls, it is very flexible to use with xib, and all o
Each iOS developer is certainly familiar with Loadview and viewdidload, although the use of these two functions is really very simple, but similar to the initwithnibname/awakefromnib/ It's very confusing to put initwithcoder together.First, LoadviewNever call this function actively. The view controller calls this function when the property of the view is requested and the current view value is nil . If you create a view manually, you should reload the function and do not invoke [super Loadview]
Let's take a look at an eidttext combination control with the delete button. The delete button is displayed after the user input. You can click it to cancel the user input. First, write a custom control layout: To achieve the button Effect on the right of the input box, be sure to hide the button. Write an editcancel class to delete user input. The textwatch interface is used to listen for text changes in the input box. It's easy to use. Just implement the three methods. ViewCode: Import A
Ib_mutex_t {OS _event_t event; // wait for the event volatile lock_word_t lock_word; // The lock variable OS _fast_mutex_t OS _fast_mutex; // The Atomic lock system is not supported and the mutex ulint waiters is used; // whether there is a waiting thread} 2) Obtain mutex flow [mutex_enter_func (ib-mutex )] A) First, check mutex-> lock_word to determine whether the lock can be obtained. B) for systems that do not support spinlock, use the pthread_mut
instance of a functionAlert (a.__proto__ = = Function.prototype);//a's parent prototype points to the Function's prototypeAlert (A.prototype instanceof a); The prototype of//A is an instance of aAlert (a.prototype.__proto__ = = A.prototype); The parent archetype of the//a prototype points to the prototype of a var IA = new A ();//ia is an instance of a, ia.__proto__ = = = A.prototypevar IB = new A ();//ib
Transistor as a switch, is the transistor working in the saturation zone, the NPN transistor as an example (all of the following) As shown in the figure: when the vin=0, transistor b-e There is no forward bias, and cutoff, equivalent to the state of disconnection, at this time vce=vcc,c pole current ic=0; When the transistor is closed (in the saturation zone), the load RC and transistor equivalent in series, through the RC current, through Ohm's Law, ic= (Vcc-vce)/RC, (at this time the Ic is sat
:}; 9: 10: ClassChild: Father 11:{ 12:IntIC _; 13:VoidFuncc (); 14:}; A father object only contains (low address> high address): IA _, IB _. That is, the size of a father object is 8 bytes, and the function does not occupy the memory space.Why not? In fact, the member functions of the class can be seen as essentially the same as normal functions. The compiler knows the position of the function
AbstractY = a + B; how can we use digital reality for a very simple computing? IntroductionUse environment: US us II 8.0 Y = a + B; this is a simple operation in C. However, if you want to use OpenGL on the digital path, beginners may encounter some difficulties. Y = a + B Do not use clockAdd2_assign.v/OpenGL Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 Module Add2_assign ( 2 Input [ 7 : 0 ] IA, 3 Input
. vertexbuffer) {graphicsstream DATA = VB. lock (0, 0, lockflags. none); data. write (New customvertex. positioncolored (-1.0f, 1.0f, 1.0f, 0x00ff00ff); data. write (New customvertex. positioncolored (-1.0f,-1.0f, 1.0f, 0x00ff00ff); data. write (New customvertex. positioncolored (1.0f, 1.0f, 1.0f, 0x00ff00ff); data. write (New customvertex. positioncolored (1.0f,-1. 0f, 1.0f, 0x00ff00ff); data. write (New customvertex. positioncolored (-1.0f, 1.0f,-1.0f, 0x00ff00ff); data. write (New customverte
class CA: IA { # Region IAMember Public void run () { System. Console. writeline ("ca "); } # Endregion } If you are usingVs2005Tool. When implementing the interface, a selection item "implementation interface" will pop up.IAOr explicitly implement the interfaceIA", The implementation interface looks very simple, but what is" explicit implementation? Modify the interface definition code above and add a new interfaceIB: Public interface IA { Void run (); } Public inte
-using-indexes --log-error=/oradata/app/iee/data.err --pid-file=/oradata/app/iee/data/JingyuDB.pid --socket=/tmp/mysql-ib.sock --port=5029[root@JingyuDB ~]# ls -lh /etc/my-ib.cnf -rw-r--r--. 1 root root 2.2K Jan 27 16:08 /etc/my-ib.cnf[root@JingyuDB ~]# ls -lh /etc/init.d/mysqld-ib -rwxr--r--. 1 root root 14K Sep 9 2013 /etc/init.d/mysqld-ib[root@JingyuDB ~]# ls -lh /oradata/app|grep ieedrwxr-xr-x. 4 roo
goal. The main functions are implemented in MUTEX_ENTER_FUNC and mutex_exit two functions. 1) Data structureib_mutex_t{ os_event_t event; // wait for event volatile lock_word_t // lock variable / / do not support atomic lock system, use mutex Ulint // whether there is a waiting thread }2) Get Mutex Flow "Mutex_enter_func (Ib-mutex)"A) first spin, check the Mutex->lock_word, determine whether the lock can be obtainedb) for systems t
The go language requires the conversion to be displayed between different types. Conversions are divided into type conversions and interface conversions.The idea of type conversion is:The X type needs to be converted to the Y type, and the syntax is T (x). If you are unsure of the priority of some place, you can add () the constraint yourself to (T) (X). Such as:*point (P)//and * (Point (P))(*point) (p)//p converted to *point(Func ()) (x)//x converted to UNC ()(func () int) (x)//x convert func (
If you do not plan to use IB in a project, you can remove the entire IB part from the project. After following the steps below, your project will not use the ib nib file or obtain the default layout information of the UI, which means you will encode it yourself, supports windows, views, and other objects. Whether to use the UI is a matter of developers' preferenc
;...} Here is an example to illustrate the differences and usage of the three: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Style > Div, span {background - Color: green; margin: 5px; Border: 1px solid # 333 ; Padding: 5px; Height: 52px; color: # FFF ;}. B {display: block ;}. I {display: inline ;}Div. IB {display: inline - Block ;}Div.
number of times after the N-2 times of two adjacent comparison;3) by analogy, N numbers are compared in a total of N-1 bits, and n-J times are compared in the J bits.The program section is as follows:Void main (){Int A [10];Int I, j, T;Printf ("input 10 numbers/N ");For (I = 0; I Scanf ("% d", A [I]);Printf ("/N ");For (j = 0; j For (I = 0; I If (A [I]> A [I + 1]){T = A [I]; A [I] = A [I + 1]; A [I + 1] = T ;}Printf ("the sorted numbers:/N ");For (I = 0; I Printf ("% d/N", a [I]);} 3. sort by
+=Score[n][i]; } returnsum;}intIsum_column (intScore[][n],intN) { inti,sum=0; for(i=0; i) { if(score[i+1][0]==0) { Break; } Sum+=Score[i][n]; } returnsum;}2. Seek the sum of the elements of each row, column, and diagonal of any square.#include #include#defineN 40intMain () {intmatrix[n][n]={0},i,j,sum,ia=0, ib=0, Ic,id; CharC; for(j=0; j) {ia=0; for(i=0; i) {scanf ("%d",Matrix[j][i]); IA++; if(matrix[j][i]==0)
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