tenable lce

Now let's analyze the code of some of the previous example programs Bache. The following example appears in a simple Example section. def fact (N) If n = 0 1 Else n * Fact (N-1) End End print fact (argv[0].to_i), "\ n" Because this is the first explanation, we will analyze it by line. def fact (N) The first line, DEF is used to define a function (or, more accurately, a method; we'll discuss in detail what a method is in a later section). Here, it indicates that the fact function takes an

) and (utf8_general_ci,coercible) For operation ' = ' Utf8 Utf8 SET NAMES GBK TRUE Yes SELECT * FROM info WHERE username = ' 縗 ' OR username=username # ' Utf8 Utf8 SET NAMES UTF8 TRUE No Utf8 Utf8 Not set TRUE No Summarize:In the PHP 5.3.10 CI3 EnvironmentWhen SET NAMES GBK and Pdo::attr_emulate_prepares are true, there is a potential for injection PDOThese 2 condi

Original address: The sky of a bird, http://blog.csdn.net/heyongluoyao8/article/details/49429629 the treatment method for preventing the fitting As we all know, when data mining or machine learning models are established, because in statistical learning, the assumption that the data satisfies the independent distribution (i.i.d,independently and identically distributed), That is, the data that is currently produced can be used to speculate and simulate future data, so it is the use of historica

2 Classification (classification): Under the existing classification criteria, the new data are divided and classified. Common classification algorithm:Naive Bayesian (Naive Bayes, NB)Super simple, just like doing some number of work. If the conditional independent hypothesis is established, NB will converge faster than the discriminant model (such as logistic regression), so you only need a small amount of training data. Even if the conditional independent assumption is not

Today encountered a problem, that is, a >10 and /* AB is the source number, BA is the number of results * * Solution: BA = (ab-(AB/10)) * + (AB/10) Suddenly there is a very strange idea, can you use subtraction? After observation, we found that the number of sources and the number of results added two, to get a number of loops ... Then use subtraction can also achieve ... such as: 35 after the number of swap 53 = (5+3) *10 + (5+3)-35 = 88-35 such as: 47 after the number of swap 74 = (7+4) *1

high quality information (books, literature, etc.), word frequency is a good, can be implemented through the program language, the expression of words in the document in the weight of the way. Yes, the question comes out, some words such as "we", "everyone" and so on will certainly appear in many articles, but with this to measure the above conclusion is obviously not tenable ah. Congratulations on this step, this kind of vocabulary for the identif

the site experience, now many personal sites and Baidu as a spam site does not make much difference, therefore, we operate personal website, the first webmaster user experience perspective to look at this problem, such as content and site positioning, site layout optimization. 　2, the importance of a new view of the blog Before we think that the weight of the blog has been overlooked by Baidu, in fact, from the author in the recent operation of several security Network Camera site, blog impo

traffic allowed by a single service instance can increase overall throughput, a theory that relies on the assumption that the resources available to the server are unlimited. We know that this assumption will not be tenable under any circumstances. If our concurrency exceeds the critical point that the server can withstand, the entire server will crash. As a result, WCF needs to allow a single service instance to handle multiple requests received con

I read an argument about Weibo rankings, "Weibo SEO is not related to the number of broadcasts, the number of people he listens to, the number of numbers involved, but the number of listeners and the number of comments broadcast." You can look at the data I wrote in the sequence above, with this assertion is completely inconsistent, so this assertion is not tenable, as to how the micro-blog In the end is how to rank, we have to use a large number of

the most important. The content is more important than the keyword. Most viewers focus on content rather than keywords. Those who use keywords to attract viewers for a while will not be tenable in the long run. 4. Import link (links) Importing links is second-most important compared to content. Remember, the quality of the import link is more than the quantity: the more links you have, the better. You can update the links every half month or one mo

before, may wish to go back to familiar with the first. Ford-fulkerson solution of maximum flow problem As shown in the diagram, for a binary graph, the capacity of an existing edge (Capacity) is infinity, adding a source point S and a meeting point T, so that s and T are connected to a step in the two diagram and set its capacity to 1. In this case, the flow network G is obtained, and the maximum flow calculated is equal to the maximum two-point matching. However, we must also answer why t

"Machine learning" in mechanical engineering press is a very good introductory book, here to organize my study notes The first chapter, Introduction1.1 Definition of machine learning:For a certain type of task T and performance Metric p, if a computer program is self-perfecting with experience E in the performance of P measured on T, then we call this computer program to learn from experience E.1.2 Designing a learning system:In general, the training sample is distributed in a similar distribut

Blockchain Enthusiast (qq:53016353) According to the relevant literature of the cottage currency, in 2140, the production of 2,100 shanzhai coins, and no longer growth. According to the principle of cottage currency, after 33 times halved, the mining output of each chunk will reach 0.58 Cong, less than the smallest unit one cong. Each half of the interval is 210000 blocks, the total output time given in the above literature (2140) is calculated by 10 minutes of output time per block. (210000*10/

= 1024*1000000/44100= 22.32ms (in ms)2) MP3MP3 Each frame is 1152 bytes, then:frame_duration = 1152 * 1000000/sample_rateFor example: Sample_rate = 44100HZ, the calculated length is 26.122ms, this is often heard mp3 each frame playback time fixed to 26ms.3) H264Video playback time is related to frame rate frame_duration = 1000/fpsFor example: fps = 25.00, calculated from time to time is 40ms, this is what the peer said 40ms a frame of video data. The theoretical audio and video (playback) synch

x, and the degree of deviation is calculated as: This equation is the difference measure used in the root test. When the observed value of several samples is provided, the X1,X2,......XI,......XN value can be obtained in the form, and the value is compared with the pre-set threshold value, if the threshold is greater than that, the original hypothesis is not tenable, whereas the original hypothesis is established. In the feature selection phase of t

: First, all the endpoints are a must defeat P (on the game, the turn who took the card, there are 0 cards left, the person loses, because no card is preferable); Second, all one step can go to the point P is N point; Third, through one-step operation only to N point is P point; All the above topics can be solved by P/N analysis method. These questions are very simple. The following is a simple analysis of only 2149: (P/N analysis can also) First, it is clear that the use of Ba Shi game has a pr

not see the home page, check the next Baidu weight and included entries, all can not find rankings, ranked in the back of 108,000! At that time my first reaction is: "Finished, was Baidu K, will be scolded by the boss death!" 　　 No way, something happened to find the cause of the remedy it, who called us is the operation of the Commissioner. I mainly from the following aspects of diagnostic analysis: First, the first consideration is of course the reason to change the space, but,

really useful, then we can nofollow the home page out of the internal link, The weight is all concentrated on the home page, but is this statement tenable? Obviously a bit absurd, in fact, think about it, the home is also a link area, even if we use nofollow to save a part of the weight, but these weights or may be divided into friends chain, so on the internet to browse others about the view of SEO, We also have their own independent thinking space,

contents of the Recycle binSql>select r.original_name,r.type,r.droptime from RecycleBin R;650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/4D/7D/wKioL1RR_GKihVfiAACM4QMiNjY373.jpg "title=" 2.jpg " alt= "Wkiol1rr_gkihvfiaacm4qminjy373.jpg"/>--16, add a whole comment to the tableSql>comment on table student is ' Student information table ';--17, Adding comments for the Age column in the student tableSql>comment on COLUMN student.age is ' age needs to be greater than 1 years old and less

whether the interface layer is considered properly. for plug-in design, if the interface layer is required to perform the task/need to pass the information clearly defined, then the run-state and whether it is plug-in (dynamically loaded plug-ins, only the first use of the load at a cost, InnoDB at the start of the load so even this little impact does not exist). Plug-in design is only a design-level problem, not the problem of running state, so "plug-in storage is fragmented ..." is not appro