Review and research on "semantic gap" problem in the content based image retrieval;

One of the most challenging research issues in content-based image retrieval(CBIR) is how to bridge the significant semantic gap between the low-level image features and the high-level semantic concepts.

Because of the "semantic gap" which is often encountered in the image data,traditional CBIR technology can t deal with the problem of image retrieval in digital libraries sometimes.

The differences between English and Chinese have constituted obstacles for the translation from English to Chinese and vice versa,and also formed gaps between the two languages,cultures and ideologies.

And there is enormous wide gaps not only between nature and freedom but between cognition and morality.

Simply Analyze the Disadvantages on the Sustainable Development of the "Digital Divide;

The digital library construction under "Digital divide" vision;

Digital Gap and Imbalanced Cyber Development;

On how to bridge the digital gap between the advanced countries and China;

The Digital Gap Question on E-government Construction in China;

Education divide,gender divide and rural-urban divide are the three main aspects of the digital divide s social effects,which directly affect the harmonious development of economic society.