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We report a facile and efficient strategy for the preparation of graphene-Ag2Se nanocomposites. The reduction of graphene oxide (GO) to graphene was accompanied by the formation of Ag2Se particles on the surface of graphene nanosheets. The results of X-ray diffraction (XRD) and Fourier transform infrared (FTIR) confirmed the efficient reduction of GO. Transmission electron microscopy (TEM) images of the sample revealed the morphology of the architecture of graphene-Ag2Se hybrid. Photoluminescence (PL) measurement was further employed to study the optical properties of the nanocomposites. The results show that the graphene-Ag2Se nanocomposites can be prepared by a simple hydrothermal method, and Ag2Se particles are well distributed on the graphene nanosheets.

Undergraduates' innovation ability is formed and developed gradually in the basic of the general practice ability and special practice ability. The study on teaching practice found the following conclusions. The students' general practice ability is the basis of the innovation ability. And the general practice ability is developed in the professional courses through the gradual participatory teaching of process. The systemic projects teaching model can effectively promote the undergraduates' practice and creativity. Besides, much more participants would benefit from the systemic projects teaching model than the declaration model based on the creative experiments. In addition, it is often the verification projects that used in the traditional teaching model. But the verification projects do no good to the initiative and creativity of the students. The research of this paper will provide an instruction for experiment teaching of the undergraduate courses. Index Terms - undergraduate, experiment teaching of course, practical innovation ability, project guidance.

The risk analysis of highway traffic safety is a uncertainty system problem. Based on the theory of set pair analysis, stochastic simulation of triangular fuzzy numbers, herein a risk analysis model for the highway traffic safety was discussed. A concept of multi-element connection number of the set pair, which was consisted of evaluation index sets and classification standard sets of the highway traffic safety, was described to depict the hierarchy and fuzziness of membership between the evaluation sample and classification standard. Moreover, the triangular fuzzy number simulated by means of stochastic simulation was used to express the changing process and fuzziness of component coefficients of discrepancy degree. Combined with the weight of evaluation index, the integrated connection number was calculated to analyze the risk grade of highway traffic safety of the sample. The reliability of evaluation grade of traffic safety was also given. Finally, a practical example was described to confirm and to compare with the attribute evaluation method and the extension method. The results show that the proposed model is more feasible and easy to operate, and the result is good. It can make full use of the uncertainty information of evaluation index and grade classification standard for the highway traffic safety, and resolve the difficulties of traditional operations of triangular fuzzy numbers and their functions.

The evaluation of economic efficiency of industrial enterprises is a comprehensive uncertainty system problem. Based on the theory of set pair analysis, stochastic simulation of triangular fuzzy numbers, a novel evaluation method for the economic efficiency of industrial enterprises was investigated in this paper. A concept of multi-element connection number of the set pair, which was consisted of evaluation index sets and classification standard sets of the economic efficiency of industrial enterprises, was introduced to express the hierarchy and fuzziness of membership between the evaluation sample and classification standard. Moreover, the triangular fuzzy number simulated by Monte-Carlo method was presented to depict the changing process and fuzziness of component coefficients of discrepancy degree. Combined with the weight of evaluation index, the integrated connection number was calculated to assess the grade of economic efficiency of industrial enterprises of the sample. The evaluation in form of a confidence interval corresponding to a confidence level was also given. Finally, a practical example was described to confirm and to compare with the extension method. The results show that the proposed model is more feasible and easy to operate, and the result is good. It can make full use of the uncertainty information of evaluation index and grade classification standard for the economic efficiency of industrial enterprises, and resolve the difficulties of traditional operations of triangular fuzzy numbers and their functions.

This paper analyzes the characteristics of transportation infrastructure and traffic volumes of logistics parks, and makes suggestions on the methodologies of traffic organization planning for logistics parks. The methodologies have been successfully utilized in the transportation planning of Bai Yang Wan Logistics Park in Suzhou, China.

This paper introduces the main contents of transportation infrastructure planning for logistics parks, and researches on the technologies of key considerations in planning practice. The technological methodologies put forward in the research have been successfully utilized in the transportation planning of Bai Yang Wan Logistics Park in Suzhou, China.

Image matching plays an important role in many fields, such as pattern searching and recognizing. The majority of the present image matching algorithms are the betterment ones which based on template matching. This thesis aims at the improvement of matching strategy which based on image feature point (FP), by searching correct feature point, and setting bidirectional threshold value, we can quickly and precisely implement the matching process with optimistic result

In this paper, a new second order recursive learning algorithm to multilayer feedforward network is proposed. This algorithm makes not only each layer's errors but also second order derivative information factors backpropagate. And it is proved that it is equivalent to Newton iterative algorithm and has second order convergent speed. New algorithm achieves the recurrence calculation of Newton search directions and the inverse of Hessian matrices. Its calculation complexity corresponds to that of common recursive least squares algorithm. It is stated clearly that this new algorithm is superior to Karayiannis' second order algorithm (1994) according to analysis of their properties.

A kind of new "growing" functional link nets prediction models and recursive Gauss-Newton learning algorithm are stated. These new networks and learning algorithm have the characteristics of fast learning and training speed and high prediction precision. They have been successfully applied to prediction problems of oil field yield. Validity of the new scheme is indicated.