Advanced Materials Research Vols. 219-220

Abstract: For the multi-attribute characteristics of scale, quantity, service radius and target of service in city logistics facilities，this paper considered the similar phenomena between city logistics facilities caused by the interaction of different social and economic attributes. Based on the analysis of the similarity degree calculation methods in computer science and mechanical engineering, it proposed two calculation methods of similarity degree in city logistics facilities. The qualitative and quantitative attributes were considered separately in the first method, the quantitative attributes were disposed by triangular fuzzy number.The similarity dimension was introduced as the basis of the similarity degree calculation in the second method. A merge processing method was used to incorporate all similar characteristics of every similarity dimension and a similarity calculation formula was deduced from the theory of similarity.

Abstract: Spatial load forecasting is one of key problems in the process of electric system planning. But due to the special complexity of the power load, spatial load forecasting is still unsolved and need to be studied further. Here spatial load forecasting is presented by data fusion technology. In detailed, the samples are firstly classified by grey clustering, which results in the better-performanced samples labeled with the grey leagues. After that, as limited samples as be concerned, various LS-SVMs are trained by the corresponding classified samples. In this way, complicated nonlinear regression modeling of spatial load and its influenced factors is accomplished by LS-SVM with more efficient training. Finally, real data are employed to test the proposed approach.

Abstract: As a large agricultural country, national economy as well as its social stability, development and modernization are influenced fundamentally by agricultural. Based on the views of agriculture production factors, this thesis Select land, labor, capital as indexes. In empirical analysis, it first carries out linear regression analysis and detects the agricultural economy and its influencing factors.

Abstract: As an auxiliary facility to assist a disabled patient to perform a normal walk, the crutch or the wheelchair is considered to provide an essential mobility as a mechanical facility. However, these facilities can not provide a basic function for these patients to sustain a standing position except a mechanical prosthesis. To control the activity of the prosthesis, a muscle membrane potential produced via an arm swing during the period of a walk is used as a control signal. In this paper, we adopt a dual ADC interface on a STM3210E-LK board to extract two kinds of muscle membrane potentials on a single arm. These two potential signals can be used to control the activities of the mechanical prosthesis. In the experiment we use these two potential signals to control the activities of a humanoid robot to simulate the activities of the mechanical prosthesis.

Abstract: The abrasion of excavator’s key connection position because of the poor lubrication has become the major factor that affected the mechanical benefit. The excavator GJW111 was taken example in this article, the measures of the Automated lubricate System based on the control of the testing of working states was studied, that is, the automated pouring grease, the working state test and the alarm when wrong of the every lubricating point on the machine is accomplished together by the control sub-system,lubricating system and some correlated components. The principle and the function of the system was described. The work condition was analyzed, and at last it was about the plan of the software and the hardware of the system.

Abstract: For a multi-dimension force transducer, the mutual coupling between any two force transducers is unavoidable, and normally, the coupling characteristic is nonlinear. But the nonlinear coupled transducers are often treated as linear coupled ones since the difficulty of nonlinear decoupling. The 6-axis wheel force transducer (WFT), as the key instrument of vehicle roadway test system, the precision of which is influenced badly by the mutual coupling. The linear coupling analysis and decoupling method was introduced, on the basis of which, the polynomial nonlinear coupling model was derived, and the polynomial nonlinear decoupling method was discussed. The measurement data of WFT were processed. The results indicate that the accuracy of nonlinear decoupling is higher than that of linear decoupling.

Abstract: The current theory of military spending allocation is the product of traditional security concept. With the development of national security concept, theoretical innovation is in request. On the basis of the Smith`s neo-classical model and according to the multi-threats environment we established an efficient allocation of military spending model. This model indicates that in the current and future periods, the optimal scale of military spending allocated on protecting non-traditional security should be 4% of total military spending. This conclusion also shows that the ability of carrying out traditional military operation is still the core military capability.

Abstract: The article analyzes undergraduate Mathematical Modeling Competition’s characteristics and the theory foundation thoroughly,and points out the significance of this competition both in improving colledge students’innovation ability and in higher mathematical education reform. It concentrately summarizes and expatiates the prominent problems in present undergraduate Mathematical Modeling education from four aspects:students’ ability,teachers’quality,teaching facilities and the management and organization of the school,on basis of this,the article puts forward teaching strategies for undergraduate Mathematical Modeling,and also dwells on how to improve the thinking principles and capabilities about undergraduate Mathematical Modeling by examples. Establishes the teaching mode of colledge mathematical modeling and thoroughly analyses the hierarchy of mathematical modeling’s teaching and basic principles for selecting titles.At last,the article proposes several questions which we should pay attention to about colledge mathematical modeling teaching.

Abstract: The technologies of Wireless local networks and cellular network are very popular and more and more service under the integrated heterogeneous environment. Stream Control Transmission Protocol (SCTP) is considered as an ideal to support the communication between them by enabling a mobile client to freely switch the IP address in different networks. In this paper, we propose an extended analytical model for SCTP which consider the congestion window and scalable of congestion control mechanism. A great advantage of our model is that establishing a relationship between the throughput and congestion control mechanism. Furthermore, the analytical model provides a useful tool to improve congestion control mechanism of SCTP.

Abstract: The continuous development of the digital library construction proposed high storage requirement, the traditional storage technology has become increasingly unable to meet the needs of digital library development. The emergence of cloud storage technology for digital libraries provide a new storage options, compared with traditional storage, cloud storage has obvious advantages. This paper analyzed the data type of digital library, by comparison with the traditional storage to study the advantages of cloud storage.