1. Analysis Overview
Related Concepts of memory models
Three concepts in concurrent programming
Java memory model
Deep analysis of volatile keywords
Scenarios using the volatile keyword
2. Related concepts of memory modelCache consistency issues. It is commonly said that the variable accessed by multiple threads is a shared variable.
-friendly to the search engine. ”。 The exact point here should be the latter, because Baidu is based on the position of the relationship, it is inconvenient to say that this refers to the "user" is their users, not users of the site.
These are indeed the essence of SEO. As mentioned in the third series of Amazon's "What other Items does Customers buy on viewing this Item?" The recommended module is the most typical example-it shows the right links in the right place, regardless of any extraneou
The best way to assess the difficulty of a keyword (whether it's up front) is to use the right tool. If you search on the Internet, you can see several keyword difficulty analysis tools (software). Select a few, such as Seochat ' s Keyword difficulty tool,,cached ' Keyword d
Website optimization is the first step is the keyword positioning, one is the user search keyword positioning, one is the industry's keyword positioning, these 2 positioning determines the site's core keywords. Site optimization of the success and core keyword analysis, from
would gladly admit that Google is one thing in determining a single keyword or long tail keyword, but in many cases there are differences in search results. The failure to locate a single keyword will be different in your search list and will be magnified on the return page of the search results-which may directly affect the sales.
Error 4-one ignores the co
important keyword rankings not only did not rise, but the core keyword "Zhengzhou website construction" appeared a larger decline, even with "Zhengzhou website construction" Related keywords have been different degrees of decline, such as the figure;
For the site such an unexpected situation, the dragon-shaped through in-depth analysis of the und
For Seoer should be aware of the site's outside the chain to determine the keyword ranking of an important factor, many times the webmaster will follow the "content for the king, outside the chain for the Emperor" optimization method to the implementation of the site, so this has become a webmaster optimization site One of the necessary technology. However, the author in the Webmaster forum to see such a title "Outside the chain is not a good way to d
very low, or new station, often change the title, website revision, operation of some cheating means will lead to decline even by K.
When you know that the site is because of these factors and lead to decline in keyword rankings, the correct approach is to adjust immediately, if there is a revision or change the title and other operations, waiting for the search engine to recover.
Second, the more fierce competition in the industry
When encount
On an article I have written "analysis of QQ space can do Baidu keyword ranking", may be a lot of friends have a deep impression, because the QQ space ranking is very rare, especially in the home page, Ken can include some of the space, especially those certified blog, but the chance to meet the ranking of the home page to let everyone just very curious, The result is to search, and then more to click on th
course, the premise is that the keyword library is large enough.
Add:
5 The estimated number of Baidu routing ip Statistics method:
For example: The first number of keywords ranked 0.685, the second is 0.562, the third is 0.553, the fourth digit is 0.352
Wait a minute.
A keyword of the antecedents of ip= keyword search *
" to the word segmentation and Word merge processing, and add punctuation filtering function, get word segmentation results. Only Linux/unix systems are currently supported.
2, compare the extraction results with the existing thesaurus, get the most consistent keyword here is to see the thesaurus, we can define our own thesaurus, can also use the existing mature thesaurus.
3, and then the two sets of keywords to compare, get the most consistent with
The frequency of the site snapshot update is always the webmaster to measure the quality of one of the standards, even if the exchange of links also usually requires snapshots in 3 days. However, the snapshot date must determine its ranking and the weight of the site? In the search engine rankings, some snapshots 3 days, or even a week and a half months have not been updated site, in the keyword ranking still can be ranked in the forefront, why? The a
Before we have said Google Trends, today we say keyword analysis of another sharp weapon, Baidu Index.
Baidu Index official website: http://index.baidu.com/
Like Google Trends, Baidu Index is also a keyword research tool, its function is more powerful than the Google trend. Compared with the Google trend, Baidu Index is also through the chart form to visually d
PHP keyword Replacement class (avoid duplicate substitution, preserve and restore original link)
The main contents of this section:
A keyword Replacement class
Can be used mainly for keyword filtering, or keyword search substitution.
Implementation Process Analysis:
Search engine to the page keyword matching degree analysis mainly through three aspects: keyword density, keyword occurrence times, related keyword matching degree
First, the keyword density
function definition has a * * (double star) prefix, all other keyword parameters other than the normal parameter will be placed in a dictionary passed to the function, such as:Def FUNCF (A, **b):Print aFor x in B:Print x + ":" + str (b[x])Call FUNCF (c= ' Hello ', b=200), execute the result100C: Hellob:200As you can see, B is a Dict object instance that accepts the keyword arguments B and c.General paramet
the guidance of users to search for the main. Through the blog and Baidu's own product link to guide the user to reach the destination. From the other hand increased word-of-mouth advantage, but also to avoid the Baidu audit too strict problem.
4, the site within the chain optimization
The optimization of the inner chain is as important as the outer chain. Because the site main program for the cms+ Forum, therefore, in the forum mainly set the keyword
Do site and SEO friends will find that the recent Baidu in the adjustment algorithm, resulting in sharp fluctuations in site keywords, many sites appear in the rankings or even all disappeared, especially the February 24 adjustment is the most serious. I am also a rookie to enter the ranks of the stationmaster soon, do a new station of their own, to the present 2 months or so, in this update is not spared, originally all the keywords in Baidu home page, now only one still remain in place, the re
high quality
How do you judge the quality of the keywords? search for relevant information? There may be tens of millions of related amounts in a keyword search engine, but the number of users searching is pitifully low. Why? There are too many unrelated matching information in the relevant information. If the user to optimize the keyword, even if the home page how? It is possible that, in addition to the
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