Applied Mechanics and Materials Vols. 44-47

Abstract: Search engines can bring a lot of benefit to the website. For a site, each page’s search engine ranking is very important. To make web page ranking in search engine ahead, Search engine optimization (SEO) make effect on the ranking. Web page needs to set the keywords as “keywords" to use SEO. The paper focuses on the content of a given word, and extracts the keywords of each page by calculating the word frequency. The algorithm is implemented by C # language. Keywords setting of webpage are of great importance on the information and products

Abstract: In the paper, the relationship between tutors and students, and relationship between instructing and learning have been studied on the basis of analyzing educational teaching characteristics of Master of Engineering. Constructing Teaching Methods fit to engineering master's teaching idea and teaching method and teaching media is an important security of promoting teaching quality and bringing up Master of Engineering.

Abstract: Indirect stabilization technology can make the optical seeker lower cost and more compact, but it will also decrease the system’s performance. In order to improve the line-of-sight (LOS) stabilization precision, the indirect stabilized seeker’s model and loop control algorithm must be deeply studied. In this paper, the dynamic model of LOS coordinate frame is created according to the working principle of indirect stabilization system; A new no-angle-error control scheme was proposed. For severse disturbance environment, a feedforward torque compensation control algorithm was proposed based on disturbance torque estimation. The simulation and experiment results show that the proposed control approach can make the system tracking the instruction angular rate quickly and exactly, and also have the strong disturbance resistance ability. The study result will have great significance to the indirect stabilization technology’s theory study and engineering application.

Abstract: Cyber Physical Systems (CPS) is a new science to joint physical and computation together and it can be used in information technology, industry process control and other fields. But its model remains a new research field that needs to be explored. In this paper, we put forward a novel CPS model based on Cognitive Network (CN) and accomplished the combination of CPS and CN. The model was composed of four layers included physical layer, network layer, user layer and cross layer. We discussed every layer in our model in which the functions such as control, communication and so on were described. We also presented the feedback circle in cross layer detailedly. Finally, we explained the suggestion and future work briefly.

Abstract: In this paper, research and progress of corrosion inhibitors are reviewed from the aspects of history, classification, inhibition mechanism, evaluation methods and development trend. It is of great theoretical significance and high social and economic value for development of new efficient and low toxicity corrosion inhibitor and deep research on the inhibition mechanism.

Abstract: A fuzzy clustering algorithm based on improved particle swarm optimization was proposed in this paper. First reduce dimension of solution space, separate it into smaller solution space. In separated solution space, use of improved particle swarm optimization algorithm to search the sub-optimal solution as a chromosome of whole particle,use improved PSO to search global optimal solution. The particle solve the problem that swarm algorithm easy to fall into local optimal solution in high dimensional space, and the problem that the fuzzy clustering algorithm is sensitive to initial value problems. Simulation results show the effectiveness of this algorithm.

Abstract: Containers are playing an increasingly important role in modern logistics industry and usually are transported by different means including railways, ships, air and trucks. During transporting, the goods' damage event occurs frequently owing to the changes of external forces applied to the containers. In view of this problem, a container monitor based on wireless sensor network is proposed in this paper, and the real-time monitoring and tracking of a single container have been realized. Furthermore, aiming at multi-container transported in train or ship, we proposed a low power monitoring scheme based on improved LEACH algorithm. Accordingly, the energy consumption has been cut down, and the life cycle of the whole monitoring system has been prolonged efficiently.

Abstract: The quality of workpiece is influenced by the surface roughness. However, the assessment of parameters of surface roughness is not researched intensively in the new generation GPS standards system. This paper presents a method to assess parameters of surface roughness. The methodology adopts wavelet analysis to construct the model of surface topography and uses the mallat algorithm to separate roughness profile from surface topography. The assessment results of surface profile are calculated according to the standard ISO 4287:1997. The experimental results show that the method not only avoids simplicity the assessment of parameters, but also decreases the number of productions of mis-acceptance and mis-rejection.

Abstract: Knowledge acquisition is the first step in building an expert system. However, it is very difficult to find out the problem-solving approaches from a human expert completely and correctly. Here we implemented the Think-aloud experiment with an expert in architecture. By coding and analyzing the designing process, other researchers could proceed our research and find out the cognitive models corresponded to the approaches and strategies of how experts solved the problems encountered during the normal designing process.

Abstract: Fluororubber is an important material used for the stator of progressing cavity pump, which works under high temperature and high pressure conditions transferring oil of high viscosity. With sand-content oil as medium, the wear mechanisms of fluororubber by 45# steel under different speed and different initial temperature were investigated. On MPV-600 computer-controlled abrasive wear testing machine, the coefficients of friction (COF) were measured continuously for 10800s. The varying law of COF was summed up and the wear mechanism reflected was concluded.