backlink techniques

resultIf it is an engineering program, consider here if the error rate=0 case, do a special deal.In the end, Lin theoretically discussed the basis of AdaBoost:Why does this approach work?1) The Ein may be getting smaller with each step of the way2) enough sample size, VC bound can ensure that Ein and eout close (good generalization)Lin then introduces a classic example of a adaboost:To find a weak classifier, that is no weaker than the one-dimension stump, but it is so weak classifier, through

:Class A { function First () {$this->a = Get_large_array (); $this->pass_to_function (); } function Pass_to_function () {//process $this->a }}In short, to unset them as soon as possible, let the memory release, reduce the burden of the script.4. Error logfunction Insert_member () { if (! $model->insert ($data)) {Log::record ($model->geterror, Log::sql, ' Insert_ Member '); return false; }}Above is an Insert member information method, when inserting data failure, will record th

are as follows:Minprocessors: The minimum number of idle connection threads used to improve system processing performance, with a default value of 10.Maxprocessors: Maximum number of connection threads, that is, the maximum number of requests that are processed concurrently, the default value is 75.Acceptcount: The maximum number of connections allowed, should be greater than or equal to Maxprocessors, the default value is 100.Enablelookups: Whether to reverse the domain name, the value is: TRU

factorzation is a more common one is the stochastic Gradient descent method.In the optimization of the Ein, regardless of the preceding constants, consider the following equation.Because there are two variables, the gradient needs to be calculated separately. Can consult the SGD algorithm, here is the simplest derivative, no longer repeat.Here's a more: Why is the derivation of Vn only considered (RNM-WM ' vn) ² this item?Because, here the derivative has two variables, vn and WM:1) Items that d

original information (open ... Large variance ... ）2) If the original data of the various dimensions of the operation, the variance covariance, only a matrix is represented.The above-mentioned paragraph is clear, the core of PCA is: the original input data are cleverly all the dimensions of the value, the variance and covariance are put into a matrix.The goal of optimization is: The variance is large, the covariance is small, so the optimization goal is equivalent to diagonalization of the cov

also a skill to master. The technology uses the api more related to handset manufacturers. But the midp2.0 5. Network ProgrammingNetwork programming refers to the use of mobile phoneGPRSorCDMANetwork toHTTPAgreement orSOCKETform to connect to the network. Mobile Support nowHTTPThe majority of network programming, supportSOCKETis relatively small. So network programming is a temporary useHTTPprotocol for programming. 6. MultithreadingMultithreading is one of the core technologies in J2ME

mentality, not impatient, not in their own doubtful time, such a chance is not high.Now online play XXX forum A lot, there are many people are enthusiastic about the video experience, if the method is correct, you can get points. Half XXX rules are short, at any time will change the law, in here the video player do not often under, if you feel very confident when the next 2, are not in, you should first rest, see clearly the law of xxx again. Video player is best to constantly summarize the pro

do not need to use the dual technique to directly use the linear hard SVM solution.Advantages: High computational efficiency, good interpretation of results.Disadvantage: Need data linear can be divided?Multi-item KernelA polynomial expansion of x, generally in the form ofWhere A,b,q is a constant.Pros: Less stringent data requirements than linear kernelDisadvantage: There are more coefficients to be chosen; Q too general convention exceeds the accuracy of some computers, generally q?Gauss kern

Transferred from: http://blog.csdn.net/reille/article/details/7161942　　ReilleThis blog site: http://blog.csdn.net/reille/, reproduced this blog original article please indicate the source.This article outlines: Special annotation technology in the code--todo, Fixme and the use of XXX.More attention: http://velep.com/———————————————————————————————————————————————————————————————————Preface:Today when reading the source code of Qt Creator, found some comments have fixme English words, in English

Control hardware often involves opening/closing specific bits or viewing their status. The bitwise operator (1. Open the bitOpens a bit that will open the bit in the lottabits corresponding to the bit representationLottabits=lottabits|bit;2. Toggle BitToggle bit, will swap lottabits with bitLottabits=lottabits^bit;3. Close the bitTurns off the bit that corresponds to the bit representation in the Lottabitslottabits=lottabits~bit;4. Test the value of the bitThe value of the test bitif (lottabitsb

five types, respectively asked Value_type,difference type, reference type, pointer type, Iterator_category, where iterator_category represents the classification of iterator. The iterators are divided into five categories, depending on the movement characteristics and execution operations:Input iterator (read only), output iterator (write only), forward iterator (++only), bidirectional iterator (++,--), random Access iterator (covers all pointer operations p+n, etc.). Future advance algorithms

-degree increments, and the default 15 degrees are modified in tools->options->edit->constrain angle.When you change the size of the object, the dimensions are scaled in full multiples.You can create a positive shape by pressing the CTRL key while creating a graphic, such as a square, a circle (rather than a normal rectangle and an ellipse).Hold down the CTRL key while using interactive Fountain fill (interactive gradient fill), and the fill angle will be 15-degree increments. Select an object (

Other techniques for DHTML Performance ImprovementTruly More performance tips)Http://msdn.microsoft.com/library/default.asp? Url =/library/en-US/dndude/html/dude100499.asp One of the most important tasks in Microsoft's development process is to optimize the product.Most developers regard Performance Tuning as part of a functional review. For Win32ProgramOptimization has been carried out for many years, and there are a lot of literature for referen

important operation in digital synthesis is to extract the desired foreground from an image and separate it from the background. This process is called extracting Mattes, also known as keying, that is what we call the image.There are many kinds of beat methods. In fact, many commercial plug-ins are provided for each synthesis software. What we want to describe here is not how to use these commercial plug-ins, in addition, some basic knowledge and basic imaging

the cup is half empty, or that it is semi-full.Remember: Even a small step is progress.No: I will feel wrong unless I complete it all.Instead: I've taken a few steps, and I'm working very hard and it feels good. Now I'm going to see a movie.12, the delay as a signal. Stop and ask yourself, "What's the message of procrastination?"No: I'm stalling again, I hate myself.It's: I'm stalling again, what do I feel? What does it mean? What can I learn from it?Remember: You can make your own choices. You

to select the fixed angle, then enter 360/5 in the box, then click the "Rotate" button to change the rotated point label to B. Use the Segment tool to connect points A, B to get line AB.Step three select Point A, perform the "transform"-"Iteration" command, click on the b point as the initial image in the popup dialog box. At this point the screen shows an iteration of the 4 sides of the positive Pentagon (because the system default non-depth iterations are 3 iterations). Click the Show button

As we all know, how to set the text vertical center, that is: set line-height and the height of the outer box is consistent;In fact, there is a place, is superfluous, that is, height, set not set are centered;So, is the height of the line high?First small question: when the DIV does not set the height of the case, open its height is the text inside it?The answer is no, you can try it when you set the line height to line-height:0; , the height of the div is still 0; it turns out that the height o

are null characters. The expression (?!hede). will look forward to see if there is no "Hede" string in front of it, and if it is not (the other character), then the . (dot) will match these other characters. The "find" of this regular expression is also called "Zero-width-assertions" (0-width assertion), because it does not capture any characters, just to judge.In the above example, each null character checks whether the string in front of it is not ' hede ', and if not, this . is the match-cat

From: http://www.cnblogs.com/jone-chen/p/5897829.html1, get the random number within the specified range 123function getradomnum (min,max) {return Math.floor (Math.random () * (Max-min + 1)) + min;} 2. Randomly get the elements in the array 1234function Getradomfromarr (arr) {return Arr[math.floor (Math.random () *arr.length)];} 3. Generate a numeric array from 0 to a specified value 12345function GetArray (len) {var arr = [],i = 1; for (; Arr.push (i++) 　　Common

; [Self.view.layer AddSublayer:self.colorLayer]; -(void) Touchesbegan: (Nsset *) touches withevent: (uievent *) event{ Get the touch point Cgpoint point = [[touches anyobject] locationInView:self.view]; Check if we ' ve tapped the moving layer if ([Self.colorLayer.presentationLayer Hittest:point]) { Randomize the layer background color CGFloat red = Arc4random ()/(cgfloat) Int_max; CGFloat green = Arc4random ()/(cgfloat) Int