Applied Mechanics and Materials Vols. 738-739

Abstract: The paper by analyzing the existence current situation of multiple independent information systems for maritime departments, proposes can use the Service Oriented Architecture (SOA) for the AIS information sharing to do theoretical direction and functional design, in order to solve information island phenomenon of data exchange difficulty between maritime each independent information system. Based on SOA AIS information sharing adopts software engineering method based on service oriented theory, encapsulates AIS data distribution function module as Web service, achieves conveniently called by desktop, mobile phone and so on many kinds of client cross platform, cross platform, cross language, and has the ability to publish the service aggregation integrated with other server GIS service.

Abstract: With the high development of knowledge-based economy, information service industry plays an important role in driving economic transition. We use stochastic frontier analysis (SFA) method to estimate the technical efficiency in seven cities of Zhejiang Province in China. We find that the average technical efficiency of information services industry is high and have different developed trends among the cities. The human capital、industrial concentration degree, openness and urbanization have significant impact on technical efficiency, while government behaviors do not show significant effect.

Abstract: This paper is concerned with a fourth order parabolic equation in multidimensional space with boundary condition u=Δu=0 and initial function u₀. The minimizer method yields the existence and uniqueness for the elliptic equation. Finally, the existence and uniqueness of solutions of the corresponding parabolic equation are obtained from the semi-discrete problem.

Abstract: In the area of manufacturing and industrial engineering, variance calculation is the basic method to monitor the performance of instrument. The new improved method of real-time variance calculation is put forward in this paper to calculate the variance of experiment data, despite of zero or non-zero mean value data, Then it is possible to calculate the variance of any kind data at real time without save the historical data. Experiment results shows that the new method for calculate the variance can greatly improve the calculating efficiency with high precision..

Abstract: This paper analyzed the theory of free bus, established the impedance function and improved the Logit model to predict the free bus sharing rate. Through instances, the model is verified to be scientific.however, It also have a certain deviation between the mode and the truth.That is because inhabitants all have their own concepts and preferences, and the “Curious Psychology” to the new means of transport also has a fearful attraction.

Abstract: This study aimed to modify the traditional method of trip-generation by investigating the relation between trip generation and land use. Based on the interaction between urban land-use sorts and trip generation, the trip generation weights among different urban land-use sorts are determined by multiple regression analysis. Given full consideration of the land-use mixing degree, the entropy of traffic-zone-land-use mixing was calculated. An improved trip-generation model based on the entropy of land-use mixing was proposed by analyzing the relationship between trip-generation weight and land-use mixing degree. This method was tested through applying it to Xi’an urban trip generation forecasting. The result of the test shows that this method effectively illustrates the correlation between trip-generation demand and land-use mix sort, and has a better application prospect due to simple calculation, high reliability and feasibility.

Abstract: The logistic model and the four-parameter logistic model have been very effective in forecasting many technological forecasting patterns. However, they have the characteristic of symmetry and cannot effectively model asymmetric data. This paper proposes a new asymmetric five-parameter logistic model for forecasting petroleum consumption in China. The logistic, four-parameter logistic and the newly proposed five-parameter logistic model are applied to the historical data on petroleum consumption in China. The good model fit has indicated that the five-parameter logistic model has performed better than the logistic model and the four-parameter logistic model for forecasting petroleum consumption in China. The forecasted results, based on the five-parameter logistic model, have shown that the petroleum consumption-production gap in China will become larger in the future and the gap will reach over 400 million tons after the year 2033.

Abstract: Based on the optimal velocity difference model (for short, OVDM) proposed by Peng et al., a new car-following model is presented by considering the leading cars’ acceleration. The linear stability condition of the new model is obtained by using the linear stability theory. Numerical simulation shows that the new model can avoid the disadvantage of negative velocity occurred in the OVDM by adjusting the coefficient of the leaders acceleration and can stabilize traffic flow more effectively.

Abstract: This paper discusses the multi-robot cooperation positioning based on particle swarm optimization (PSO) search strategies. A group of active olfaction robots can find the position of odor source depend on the new “active olfaction” arithmetic. The active olfaction robot is regarded as a particle which can exchange message with each other.The simulation experiment wind field is built based on turbulent fluid model. A series of simulation experiments were performed to test the new localization arithmetic, and the experimental results were analysed.

Abstract: This paper illustrated the Safety levels in the Chinese Construction Materials Industry (CMMI) during the Twelfth Five-Year Plan. By establishing gray system model, the index of CCMI, such as supply, demand, import, export, and so on, were forecasted. Based on the Index system of CCMI safety that is used to investigate the safety levels, these predicted data were analyzed. Our results show that there is a danger that CCMI safety will be reduced during the Twelfth Five-Year Plan, mainly because of overdependence on exports and lack of international competitiveness. Finally, the paper discusses how to improve CCMI safety during the Twelfth Five-Year Plan.