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Label:The smallest administrative unit of the InnoDB is the pageInnoDB Minimum Application unit is the district, a district 1M, contains 64 pages, each page 16K, that is, 64*16k=1m, taking into account the hard disk locality, each read 4 extents, that is, read 4M of data loaded into memoryLinear Pre-reading:After the read thread of InnoDB reads 4M data from disk, if the data of the pages connected to the 4 extents is greater than or equal to Innodb_read_ahead_threshold (the default is 56), the d

voltage ratios to DBs uses log (Vout/vin) Describing the voltage gain of an amplifier that produces an output voltage of 3.5V for a input of 35mV as being 40dB , is equivalent to saying that the output voltage is the times greater than the input voltage. To reverse the process, and convert dBs to a voltage ratios for example, use: Note that the brackets is important and antilog may is shown on calculator keypads as 10x or 10^ And is also usually Sh

complete.: Set Wrapscan re-search, when searching to the head or end of the file, return to continue the search, by default open.Replace commandThe RA replaces the current character with a, when the period character is the character of the cursor.s/old/new/replace new with old, replacing the first match of the current rows/old/new/g replace new with old, replacing all occurrences of the current row%s/old/new/replace new with old, replacing the first match of all rows%s/old/new/g replace new wit

table query. MongoDB 2.8(version 2.8jump directly to version 3.0. Why is 2.8 named 3.0? Tang JIANFA means 2.8 has a great boost, with 2.8 a bit wronged, so MongoDB marketing division is named 3.0. )The version begins with the introduction of the Wiredtiger Storage Engine mmap, which supports the Latch-free and non-blocking algorithms. So before you use it, you must addThe wiredtiger parameter. MongoDB3.0 Promotion: (1) Write performance: 7x-10x,

)Alert (arguments. length); // 2// The callee parameter is the function itselfAlert (arguments. callee = foo); // true} When entering the execution context (before code execution), VO contains the following attributes: 1. All the parameters of the function (if we are in the context of function execution ); All function declarations (FunctionDeclaration, FD );All variable declarations (var, VariableDeclaration );Another typical example: Alert (x); // functionVar x = 10;Alert (x); //

. All the parameters of the function (if we are in the context of function execution ); • All function declarations (FD );• All variable declarations (var, VariableDeclaration );Another typical example: The Code is as follows: Alert (x); // functionVar x = 10;Alert (x); // 10X = 20;Function x (){};Alert (x); // 20 According to the canonicalized function declaration, it is filled when the context is entered; when the context is entered, there is als

button in scientific modeD Press the Mod button in scientific modeCtrl+s Press Sinh button in scientific modeCtrl+o Press cosh button in scientific modeCtrl+t Press Tanh button in scientific mode(Press in Scientific mode (buttonPress) button in scientific modeN Press the LN button in scientific mode; Press the INT button in scientific modeS in scientific mode press the Sin buttonO Press the Cos button in scientific modeT-Press the Tan button in scientific modeM Press the DMS button in scientifi

Getxcursorpos () as Long" VbCrLf _"Dim pt as Pointapi:getcursorpos Pt:getxcursorpos = Pt. X " VbCrLf _"End Function" VbCrLf _"Public Function Getycursorpos () as Long" VbCrLf _"Dim pt as Pointapi:getcursorpos Pt:getycursorpos = Pt. Y " VbCrLf _"End Function"OModule.CodeModule.AddFromString strcode ' adding VBA code in the module' Author:demon' website:http://demon.tw' DATE:2011/5/10x = Oexcel.run ("Getxcursorpos") ' Get mouse x coordinatey =

follows:X = 10X = 11X = 12X = 12This is also the case with the drop-down operator. I don't want to talk too much about this content here, but the reader can read it patiently, as Peng Zi told Augusta, "OGU, be patient, rome was not built in one day ". It indicates that operators in C ++ can be overloaded ). Programmers can use standard overload operators to perform specific operations in specific classes. For example, you can use the overload increme

10x in scientific mode F5 select hex in programmer Mode F6 select dec in programmer Mode F7 select Oct in programmer Mode F8 select bin in programmer Mode F12 select qword in programmer Mode F2 selects DWORD in programmer Mode F3 select word in programmer Mode F4 select byte in programmer Mode K. Press the ROR button in programmer mode. J. Press rol in programmer Mode > Press RSH in programmer Mode % Press mod in programmer Mode (In programmer mode,

20091006 A classic question. The following is the original question and my code. 1077 eight Time limit:1000 ms Memory limit:65536 K Total submissions:6197 Accepted:2670 Special Judge DescriptionThe 15-puzzle has been around for over 100 years; even if you don't know it by that name, you 've got it. it is constructed with 15 sliding tiles, each with a number from 1 to 15 on it, and all packed into a 4 4 frame with one tile missing. Let's call the missi

animation was executed, it basically ended. Later, I was slowly rubbing for more than one second, the county is not smooth .. Then I changed it to the second one, y =-x + 100. The effect is better, but it is too smooth .. Click it to fly far away .. After adjusting the sensitivity with AA, the effect was still unsatisfactory, so I watched the effect that Apple brought in for half a day and found that the speed was slowing down quickly, the change degree of the absolute value of acceleration see

: Trigonometric function: sine and hyperbolic sine. According to inv, we can calculate the inverse sine of the inverse function, which is also true for cosine and tangent. In this way, there are a total of 12 functions in 4*3. Algebraic functions: power functions (X2, X3, X1/3, XY, X1/y) learned in high school algebra, logarithm functions (in, log), factorial (N !), Exponential Function (10x) Others: some functions are used in program

is a PNG file named itunesartwork, but it cannot be suffixed with. PNG" 3. Default Screen Display IPhone Default.png 320mm x mm 480 iPhone (only portrait screen) boot Screen Default@2x.png 640 10x x 960 (or 640x920) iPhone (Retina display, only portrait screen) boot Screen Ipad2: Default-Landscape.png 1024x768 (or 1024x748) iPad landscape boot Screen Default-Portrait.png 768 inch x 1024 (or 768 inch x 1004) iPad portrait boot Screen

than the limit, and the detailed performance is still not very good. The texture of the instrument, especially the wind instrument, is still very hard and not true, lack of music, the size after compression is 128 kb, I think the compression ratio is ~~ The m MP3 player is better than the 10X player, which can satisfy both the main listening experience and the proper size. The M player can store music for about 95 minutes, 190 m doubles to minutes of

things using the simple event data model shown above. The event data model has a few special qualities: 1. The data is rich 2. The data is denormalized 3. The data is nested 4. The data is schemaless Event Data is rich This death event has a lot of properties-information about the player at the time of death, the cause of death, the enemy. events can have hundreds of properties; they seek to describe not just one entity, but all of the entities involved in an action. In fact, I think we shocoul

/HornTorus.htmlvertices = D1:100 D2:100u = from 0 to (PI*2) D1v = from 0 to (PI*2) D2x = (1 + cos(v))*cos(u)y = sin(v)z = (1 + cos(v))*sin(u)a = 10x = x*ay = y*az = z*a (4) ring Bucket vertices = D1:72 D2:72u = from 0 to (2*PI) D1v = from 0 to (2*PI) D2a = 10.0b = rand2(0.5, a)x = (a + b*cos(v))*sin(u)y = b*sin(v) + if(sin(v) > 0, 10, -10)z = (a + b*cos(v))*cos(u) (5) Wheels vertices = D1:72 D2:72u = from 0 to (2*PI) D1v = from 0 to (2*PI) D2a = 10.

(1) RingVertices = D1: 72 D2: 72u = from 0 to (2 * PI) d1v = from 0 to (2 * PI) D2 r = 3 * Cos (u) + 7 z = 3 * sin (u) y = r * sin (v) x = r * Cos (v) y = Y + 5 (2) random radius Ring Two methods are provided: vertices = D1:72 D2:72u = from 0 to (2*PI) D1v = from 0 to (2*PI) D2a = 10.0b = rand2(0.5, a)x = (a + b*cos(v))*sin(u)y = b*sin(v)z = (a + b*cos(v))*cos(u) #http://www.mathcurve.com/surfaces/tore/tore.shtmlvertices = D1:100 D2:100u = from 0 to (PI*2) D1v = from 0 to (PI*2) D2a = rand2(1,

than the limit, and the detailed performance is still not very good. The texture of the instrument, especially the wind instrument, is still very hard and not true, lack of music, the size after compression is 128 kb, I think the compression ratio is ~~ The m MP3 player is better than the 10X player, which can satisfy both the main listening experience and the proper size. The M player can store music for about 95 minutes, 190 m doubles to minutes of

referenced by the reference, because the reference itself is passed by reference.C. Y = 10;C. x = 10;// C is passed through ref. Here C will become a new class1C = new class1 ();}Call method:Class1 A = new class1 ();Test ();Console. writeline ("X: {0}, Y: {1}", A. X, A. Y );Class1 B = new class1 ();Test (ref B );Console. writeline ("X: {0}, Y: {1}", B. X, B. y );Output result:X: 10, Y: 10X: 0, Y: 5The output result shows the difference between using