The output of pressure sensor is affected by non-objection parameters in its application, its defect is the sensitivity to temperature. The method of the data fusion from the two sensors based on BP network can eliminate the side effect of temperatures and improve the accuracy and reliability for the pressure sensors. This method based on Levenberg-Marquardt algorithm of BP network has not only a simple network structure, but also a quick learning rate, showing a better prospect.

Fidelity ranks the top priorities when experts of the industry face the task of solving application problem of digitized ancient Chinese books in the process of their digitization. Starting from practice, this article probes into fidelity in the two links of carrier conversion and issuing ways of ancient Chinese books in the process of their digitization, and put forward new insights into solving fidelity problems.

From the perspective of research progress and relevant results, this article carries out a relatively detailed combing and introduction of the progress and status quo of digitization of ancient books in China. On the basis of the introduction, this article points out the breakthrough progress of study on digitization of ancient books in technology and theory as well as problems to be solved urgently in the process of digitization construction, such as lack of overall planning and unified standard, retrieval technology and function of supporting research of digitized ancient books are to be perfected and improved, then put forward relevant suggestion, hoping to provide reference for further research.