منابع مشابه
Change Detection in Web Page and in Flat Files
Users are interested in current web pages contents in optimum time. In this paper, we describe the technique to detect multiple changes in a web page or Flat files in form of insertion or deletion of the content or structure change. This efficient approach is suitable for client application and for implementing server applications that could serve the needs of users in monitoring modifications ...
متن کاملAdaptable Wrapper Generation for Web Page Format Change
In this paper, we propose an adaptive wrapper generator that can generate adaptable wrapper for adapting networked information sources (NIS) format changes. When NIS’s format changed, the adaptable wrapper can start recovery phase to discover the extraction rule of the new format of target NIS. The wrapper can automatically adapt the changes of content tag and accurately extract information. Th...
متن کاملDRAFT 5/5/2008: Estimation of Web Page Change Rates
Search engines strive to maintain a “current” repository of all pages on the web to index for user queries. However, crawling all pages all the time is costly and inefficient: many small websites don’t support that much load and while some pages change very rapidly others don’t change at all. Therefore, estimated frequency of change is often used to decide how often to crawl a page. Here we con...
متن کاملA Page-Based Storage Framework for Phase Change Memory
Phase change memory (PCM) has emerged as a promising candidate for next-generation memories, owing to its low power consumption, non-volatility, and high storage-density. However, PCM has limited write endurance, i.e., it can only undergo a limited number of write operations, leading to a short lifecycle. Thus, it is an important issue to find out an efficient way to use PCM in memory hierarchy...
متن کاملFocused Web Crawler with Page Change Detection Policy
Focused crawlers aim to search only the subset of the web related to a specific topic, and offer a potential solution to the problem. The major problem is how to retrieve the maximal set of relevant and quality pages. In this paper, We propose an architecture that concentrates more over page selection policy and page revisit policy The three-step algorithm for page refreshment serves the purpos...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: BMJ
سال: 2007
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.39161.561736.55