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It is the library that is an indispensable part in the building of advanced culture, the exchanging center of documentation and information, a knowledge base of teaching and scientific research, and second class for people learning knowledge. Moreover, it gives comprehensive and sustained learning opportunities to the people who love learning. Therefore , librarians play a very important role. As librarians ,they should not only classify books , maintain the normal working order of the libraries, but should have advanced knowledge of management and professional skills, providing professional service for readers who need professional books. Through surveys and statistics, this paper has made statistical analysis on the situation of Sino-American librarians. The first part of this paper mainly describes the differences of Sino-American librarians in the settings of librarians, vocational qualification requirements for librarians, and service capabilities and so on. In the second part, by applying non-linear least-squares principle, weighting linear and optimalizing the survey data, the statistical mathematical models has been developed. In the third part, through professional investigation and analysis software, namely, Minitab ,making statistics processing for data, the best representation has been got in the three aspects, that’s to say, the settings of librarians , vocational abilities of librarians, and service capabilities. Thus it provides a theoretical basis for the hiring and training of librarians. Introduction With the development of society, it is the speed of new knowledge information as well as science and technology’s spread and communication that has been more and more faster, in which, library books are the main carrier of communicating [1]. At the same time, scientific research also begins from collecting and knowing the library books, mastering the predecessors’ achievements in scientific research, and grasping the situation of domestic and foreign present research [2,3] .With the aid of rich books in the library, and through continuous self-study ,the readers can acquire new knowledge and professional skills and improve their comprehensive quality. In addition, much attention should be paid to the importance of librarians. On one hand, they can maintain the normal work of the library and the management of library information [4]. On the other hand, they can guide readers to read related classificatory literature. Therefore, the readers can save a lot of time in collecting data [5]. This paper has analyzed and studied the difference of Sino-American librarians, which has been described from the three aspects, namely, the settings of librarians, vocational abilities of librarians, and service capabilities of librarians. In the second part of this paper, by using the weighting linear, theoretical knowledge and the method of numerical successive iteration, the covariance matrix has been solved .And the diagonal value of covariance matrix can be used as a variance calculation [6,7].Ultimately, the estimate value of direct data can be gotten. Using the foreign professional statistical analysis software Minitab, the third part has optimized the results of investigation and statistics, and obtained the optimal allocation chart data of different librarians with different qualities. 2nd International Conference on Management Science and Industrial Engineering (MSIE 2013) © 2013. The authors Published by Atlantis Press 325 The comparative overview of Sino-American librarians There is a very big difference in China and America librarians, which is mainly reflected in three aspects, the settings of librarians, vocational abilities of librarians, and service capabilities of librarians. Details will be shown in the following pages. A. Settings of librarians Settings of librarians include numbers of subject classification and the numbers of librarians. And numbers of subject classification can be in accordance with the department or major [8]. In this paper, we have investigated subject classification and the number of librarians in the United States and China's 160 university librarians, and have listed the top three universities which have the most numbers. TABLE I. THE SUBJECTS AND NUMBER OF LIBRARIANS IN AMERICA UNIVERSITIES Universities in America Subject classification Numbers of librarians University of Washington 175 175 Yale University 165 164 Stanford University 153 151

Comparative Study of Librarians in China and America Based on Least Squares and Minitab Analysis