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The provision of resources and services by university libraries to the public is an inevitable requirement and the trend of social development. This paper discusses the value and reality of the current Chinese university libraries providing resources and services to the public. The specific problems and contradictions existing in reality are discussed, namely: the contradiction between the priority of the university and the public demand, the contradiction between the priority of resource security and open to the public, and the contradiction between public welfare and compensation. Suggestions based on the actual situation of university libraries are proposed.

An improved ellipse-fitting algorithm phase demodulation (EFAPD) technique is proposed to reduce the influence of light source intensity noise on a system. In the original EFAPD, the sum of the intensities of coherent light (ICLS) is an important part of the interference signal noise, which makes the demodulation results suffer. The improved EFAPD corrects the ICLS and fringe contrast quantity of the interference signal by an ellipse-fitting algorithm, and then calculates the ICLS based on the structure of pull-cone 3 × 3 coupler, so as to remove it in the algorithm. Experimental results show that the noise of the improved EFAPD system is significantly reduced compared with that of the original EFAPD, with a maximum reduction of 35.57 dB. The improved EFAPD makes up for the deficiency of the original EFAPD in suppressing light source intensity noise, and promotes the application and popularization of EFAPD.

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There are many problems in the service of college student volunteers in college libraries. This paper conducts relevant investigations and researches on this phenomenon, discusses the relevant factors of problem formation, and puts forward some practical suggestions to promote the volunteers in the university library to realize the benign development of volunteers themselves, libraries, and services.