Due to the impact of the financial crisis, the search engine market has been greatly promoted. It is said that this year is the year of the search engine. The concept of vertical search was once very popular. Regarding the replacement of the old with the new, many vertical engines have been suspended, and it is now the second half of 2009. Let us now take a look at the development of these legendary vertical search engines. We mainly have the following criteria to measure the quality of a vertical search engine based on past user needs.
A. Data update frequency
As the name suggests, it is the frequency with which the crawler crawls data from the target website.
B. Is the amount of information about the industry comprehensive?
The sources of information are extensive and specific to the industry, whether they are in-depth and focused.
C.Query information speed
The measurement of query speed is the speed of search results after searching and the time to obtain the target information.
D. Information extraction completeness and accuracy
The importance of this indicator is self-evident. The accuracy and completeness of information are directly related to the quality of the entire search engine search results.
After development, existing vertical search crawlers are divided into two basic modes.
1. The directional crawler obtains information, matches it with manual or automatic templates, and formats, analyzes and stores the information.
Advantages: Template-based information extraction technology can provide more accurate information and less junk information. Such as price, house area, time, position, company name, etc.
Disadvantages: It is difficult to cover a large area of the target website because the information extraction technology based on template matching requires manual participation in configuring templates. To cover each target website on a large scale requires a lot of labor costs, and maintaining the templates also requires a lot of labor costs. .
2. Semantic crawlers crawl the entire web. The crawlers automatically format, analyze, and store information based on semantic recognition.
Advantages:
1. Non-directional crawling of target websites across the entire network, effectively ensuring the amount of information.
2. There is no need for manual participation in customizing and maintaining templates, effectively ensuring its own manpower and maintenance costs.
Disadvantages:
Compared with the first type of template matching, which uses semantics to capture data, the accuracy is slightly lower and there are more spam and duplicate information.
Pass A below. Data update frequency B. Information comprehensiveness C. Speed of obtaining information D. Information extraction completeness and accuracy E. Product ease of use, horizontal evaluation in 5 aspects.
We also selected several more representative vertical search engines from various industries and conducted separate evaluations.
Name: Textile Search
Website: http://search.texnet.com.cn
Comprehensive evaluation: Wangsheng's website currently has a relatively professional textile product database, including more than 80,000 textile sites and more than 110,000 product information around the world with official introduction, covering business opportunities, international purchases, textile quotas, The news center, policies and regulations and other aspects of the textile industry are relatively comprehensive. However, the products and other information searched are integrated with other B2B pages. It is a bit difficult to quickly obtain the information content. It is more like a B2B in-site search.
Comprehensive evaluation: ★★★
Name: Hengzhe e-commerce search engine
Website: http://www.hengzhe.com
Overall test review: This search engine has been on the radar for more than 3 years. It is still a leader in the business information search category. It has comprehensive information and a relatively high frequency of information updates. However, it has become a bit impetuous after several revisions. The homepage immediately looks like a B2B website. After testing, it was found that, except for big cities, the amount of information in some small and medium-sized cities was not satisfactory. Regarding the accuracy of the information, it is still very good. Very useful tool. Searching is fast.
Comprehensive evaluation: ★★★★
Name: One call, one hundred responses
Website: http://www.youboy.com
Comprehensive evaluation: From the information point of view, the accuracy of data extraction is quite high. And it combines various types of information such as products, supply and demand information, shops, news, etc. It is very convenient for users. It can be said that One Call Baiying has done a very good job in commercial search and B2B. It is a very good function for shops, which greatly facilitates users to promote e-commerce information.
Comprehensive evaluation: ★★★★
Name: Zhiyouji
Website: http://www.jobui.com
Comprehensive evaluation: Zhiyouji focuses on career search. After several revisions. There has also been considerable progress. But judging from the data update frequency, the update speed is quite fast. During the trial, the author found that the information processing aspect is quite good and relatively comprehensive. I believe it can meet the needs of most users.
Comprehensive evaluation: ★★★
Name: SouShang.com
Website: http://www.28844.com
Comprehensive evaluation: SouShang.com’s information search efficiency and accuracy are quite high. The collection of corporate information, supply and demand information, professional knowledge, business knowledge, financial knowledge, etc. is relatively comprehensive. It is commendable that the first item that matches the search content is immediately presented to the user. This is unmatched by other search engines. It is very convenient for users. In terms of data update frequency, it can basically be updated in real time. Users can also publish business information, which is extremely convenient for users to search and publish. It has begun to take shape as a third-generation search engine model and has very high commercial value.
Overall rating: ★★★★★
Name: Qunar
Website: http://www.qunar.com
Comprehensive evaluation: Qunar is a relatively representative vertical search engine in air ticket search. Searching 72 websites in real time, it can be seen that it uses targeted crawling. The search results are also quite accurate. The author is quite satisfied with this application. Similarly, Qunar’s result filtering function is also very convenient.
Comprehensive evaluation: ★★★★
This article is just a comprehensive evaluation of existing vertical search engines that focus on vertical search engines. In the next article, the author will conduct an in-depth analysis and discussion of the business model, brand value, marketing concepts and market of vertical search engines. Welcome everyone to continue to pay attention.