Applied Mechanics and Materials Vols. 263-266

Abstract: In order to realize the aim of engineering educational reform in a better way and transplant and expand teaching system under the model of CDIO to Android mobile platform, this paper mainly researched how to better protect the synchronization between client side and server during the process of using CDIO teaching system in the Android mobile platform. The key problem in the research is to apply Hash algorithm to data base update of CDIO teaching system in the Android platform, which decreases network flow, increases network use ratio and optimizes the system’s performance when compared to the traditional data synchronization algorithm.

Abstract: In this thesis, a kind of electronic voting plan based on homomorphic commitment verifiable secret sharing is posed through the combined research on electronic voting and security multi-party computation. This plan applies homomorphic commitment technology which is characterized by two-way authentication during agreement implementation process and can distinguish the dishonest voters and counting mechanisms, and thus, security and impartiality of voting are guaranteed well.

Abstract: In order to solve the logic fault of Internet of things technology applied in the supply chain system, this paper presents a supply chain oriented context-aware Framework which is based on Complex Event Processing. The frame is subdivided into five levels and proposes an active event flow situation model based on Complex Event Processing. Besides, it can provide a semantic senior situation for the application of the upper layer through processing the uncertainty contextual information under the semantic rules, as a support for the top decision.

Abstract: Considering user behavior, this paper has built a Chinese sentiment lexicon based on improved SO-PMI algorithm. Sematic lexicons were used to classify the sentiment of the collected Chinese hotel reviews. The experiment has compared the feature extraction between CHI and sentiment lexicons to find out different classification performances. The results indicate that feature extraction based on sentiment lexicon gains higher F₁. The performance of classification method “Basic Semantic Lexicon + BOOL + NB” gains 92.40% of F₁. Based on different sentiment lexicons, the experimental results shows that (SO-A) and (SO-P) is slightly better than NB classifier. Therefore, it would be effective to use ((SO-A) and (SO-P) as text sentiment classifiers. The experiment also finds out the method “Hotel Reviews Semantic Lexicon using improved SO-PMI algorithm +((SO-A)” gains the highest F₁ which is 92.84%. The results reveal that improved SO-PMI does more effective on weight calculation and sentiment lexicon building.

Abstract: The limitation of traditional testing tools makes it difficult to test the software of embedded system--the resource insufficiency of the embedded system as well as the strict requirement of real-time all contribute to the unavailability of the normal method for software testing. This document introduced a method about testing of embedded software, which based on code coverage and variable watching by using the software of Testbed and RTInsight. By using this method, it’s effective to validate the software testing of embedded system.

Abstract: While dealing with Engineering Drawing based on the secondary development of Inventor, different kinds of label symbols are due to be added based on the lines in the views. For serialized parts, the system sort of the lines will change with the change of 3D models, so we need to add manual sort artificially. Through research, several methods of manual sorting have been summarized: First to traverse lines based on shape, filter out the types of the lines. Then traverse the types, take advantage of extreme value method, method using center of the view as reference system, method using manual sorted line as reference system, and composite method to positioning lines, give them manual sorting. These methods solved the sort consistency of the same lines in different views, ensured the accuracy of labeling.

Abstract: New application requirements like “real-time” and “multimedia” is formed gradually with the trend of convergence of the Internet, web 2.0 and telecommunication network. In the era of Internet and web 2.0, users hope to communicate under multimedia context, to which Weibo and other SNS have adapted a lot. Users of web community wish to demand real-time videos and share with others instantly. Network convergence, IMS (IP Multimedia Subsystems) and VoLTE deployment all make the telecom operators long for new multimedia services. In terms of the users, they want to receive multimedia service anywhere and anytime, while the service and content providers also want to build a barrier-free channel for offering and distributing service. Taking the related technologies and user requirements into consideration, a multimedia sharing service and application is proposed and demonstrated in this paper. The system technique schema and deployment solution could help understanding the multimedia sharing service framework and modules in the convergence network. Samples of signal flows and processes are demonstrated in 3 typical application scenarios. Business application, product perspective and business model analysis shows the great market potential of this new multimedia sharing application and service in the near future.

Abstract: This paper firstly introduces the basic information of CAN bus and the general method of CAN testing and points out that application layer protocol is hard to test. Secondly, this paper adapts the method of capturing, analyzing, constructing and sending CAN bus data packet to analyze certain oil system software interface protocol. Then, this paper proves this method can be usde to test the accuracy of the software interface and conduct the further software interface testing.At last,this paper points out the application suggest of this method.

Abstract: This article proposed uses xml and the Hibernate technology based on the B/S structure realizes heterogeneous database dynamic integration plan. This system through the programming interface JDom to implement a Hibernate configuration file automatically generated, using of global data dictionary access to various heterogeneous data sources and the overall database table, and realization of the heterogeneous data sources and automated maintenance of the global data dictionary. The system has a good maintainability, scalability, portability, etc.

Abstract: Currently, the embedded real-time database is widely applied in the embedded system and plays an important role. But on account of being mainly applied to the most important fields such as Communication, Spaceflight and Military as a key task control management, errors by it often results in irreversible fatal losses. Therefore, it is necessary to analyze the embedded real-time database key characteristics and test. This paper, by researching the characteristics, architecture and implementation technique of the embedded real-time database, analyzes its key properties including real-time transaction processing, concurrency control, recovery management, etc., and finally proposes applicable testing strategy and methods which have been proved in the actual test, being as a technique to evaluate the performance of the embedded real-time database.