Aiming at the requirement of mobile office application, this paper proposes a mobile office application platform based on double security system. The system accesses multi-types of mobile devices via mobile middleware and implements the interface to enterprise OA system, reimbursement system and official document system with data and reports seamlessly. What’s more, we also provide a double security system with link security and application security. Our system greatly improves the efficiency of enterprise officer.

The full polarization RadarSat-2 data used in land cover classification requires a lot of research and demonstration. Taking NLCD data as reference, this paper uses the SVM to classify 1 scene of RadarSat-2 full polarization data in San Francisco and then evaluates the accuracy of land cover classification results from area of consistency and spatial similarity. Experiments for SAR data classification get the highest overall classification accuracy of 76.91% and kappa coefficient of 0.65, which show that the fully polarization RadarSat-2 data can achieve good classification quality when it is used for land cover classification.

Traditional traceability system cannot be applied efficiently to the dairy food safety quality problems. Therefore a new traceability system for solving these problems should be studied. After describing the concepts and characteristics of internet of things and traceability system, this paper analyzes the key mechanisms of the existing representative traceability system，and points out the merits and demerits of them in detail．Finally，it also points out the open research problems．

】Campus networking and education informationization have become the main direction of education development in our country at the present stage. And campus network has become an indispensable tool for teachers and students in their daily life, management and scientific research activities, playing an increasingly important role in colleges and universities. From the construction of campus network security defense system, the specific implementation, and the safety problems in the application layer and management layer, this paper explores on the construction and implementation of the campus network security defense system.

The software talents cultivated by Chinese universities can not satisfy the practical post requirement of enterprise. In this paper, we take the software engineering specialty of Hefei University as an example to introduce the implementation idea of teaching reform based on modularization. Then, we discuss some practical measures of reform which includes specialty ability standard construction, modularized curriculum system construction, teaching method reform and autonomous expansive learning, etc. Finally, we indicate that the modularization-based teaching reform can efficiently cultivate applied talents with strong application innovation ability and post adaptability in software engineering.

For solving the problem that the demand of practice ability for application-oriented undergraduates is high, while the students feel boring and difficult to understand when learning the course of Date Structure. This paper explores on the reform of class teaching and after-class training.

Combining with the cryptography course teaching in computer science and technology professional, this essay researches on the related issues of teaching content, course arrangement, practice teaching design, and assessment means. It improves the traditional cryptography course teaching mode, achieving good teaching effect.

The rapid developme nt of intelligent mobile phone provides a great platform for internet phone. The mobile VoIP client is developed based on Android, realizing the free call function in LAN.

For the frequency usage of network data and the need for interactive experience in using big data, the early FTP, QQ group sharing, NFS, Samba and Windows sharing have been difficult to meet user’s demand for office. OwnCloud is an open source cloud office storage service solution. This paper studies on the construction of cloud office platform based on ownCloud in Linux open source environment, and lists the ownCloud service functions, providing a set of efficient cloud office solution for reference.

This paper studies on the application of batch technology in system encapsulation. Batch has the advantage of fast speed, simple programming, small script, strong function and so on. It can effectively improve the quality of system encapsulation, reduce the working intensity of laboratory technicians and improve the work efficiency.

By researching on the existing defects of network learning system for lifelong education, this article analyzes the development trend of network learning system, puts forward the construction plan of network learning system, and constructs the architecture model for lifelong education network learning system, which will provide a favorable reference for adapting to the need of today's learning and social development as well as integrating with existing learning resources of lifelong learning system.

Siemens S7-300/400 PLC has Profibus interface and applies in industrial control field widely. Normal intelligent instruments and sensors only have Modbus interface and must convert the protocol for data communication. The paper designs a Modbus- RTU to Profibus-DP gateway and introduces design schemes of power module, processor module, Profibus-DP substation module, RS485 communication module and software.

】As the development of mobile technique, traditional centralized mobility management exposes more and more problems. One solution is to support distributed mobility management. Instead of deploying on one single network entity, distributed mobility management separates data plane and control plane to access networks. Currently, distributed mobility management is applying to two mainstream protocols: mobile IPv6 protocol and proxy mobile IPv6 protocol. According to the characteristics of its own, each extended protocol can solve problems in centralized scenario and improve network performances.

ARP (Address Resolution Protocol) is one of the commonly used network protocol in TCP/IP network. Its function is to obtain the physical address based on the host IP address. However, ARP attack is also a common mean of local area network attack for the protocol characteristics, bringing serious security hidden danger to the network. According to the characteristics of ARP protocol, the ARP attack means are analyzed, and different solution strategies are given according to different kinds of attack.

Blind people in China account for a large number of global proportion. For the domestic blind guiding dogs are expensive, scarce and not universal, this paper proposes a cheap, practical and portable blind guiding robot to replace the blind guiding dog. It uses the Linux (Debian release) platform Raspberry Pi as the central processing unit, uses five ultrasonic distance sensors to collect the distance information from different angles of the forward direction. Based on the initial positioning by the sensors, the camera further determines the obstacle position by collecting image data. The result is feed back to the blind people by vibration signal. The function is realized in experiment environment.

Hidden Markov model (HMM), which is initially employed in the field of speech signal processing, is introduced into DC/DC converter failure detection. HMM is depicted briefly, and a new method to detect convert failure based on HMM is presented. First, this paper analyzes the failure mechanism of DC/DC convert, selects the output ripple voltage and inductor current and output power as characteristic vectors. Then, it models for every state utilizing HMM. Extensive experiments have been conducted on a typical boost circuit model. The calculation result shows that this method is able to detect failure correctly

AutoCAD is one of today's most popular drawing software. Users are used to log the schedule of drawings in Excel for statistical processing, which is slow and inaccurate. So the author completes the secondary develop of AutoCAD with C language in NET, loading the DWG form data to Excel sheet rapidly and accurately.

Food safety is related to social stability, which is subject to wide attention at home or aboard. According to the problems of hard backtracking and poor controllability for the food quality, this essay tries to introduce networking into food quality detection, which can realize the quality supervision in whole life cycle of food raw materials procurement, production, transportation and sales. On the base of a full analysis of the demand of food quality supervision, the structure of the system has been determined. And the key techniques of the system implementation network architecture are mainly discussed. The system can provide a reliable guarantee for the supervision of food quality.

This paper analyzes the current situation of hospital informatization, reveals the necessity of the application of server virtualization technology in the construction of informationization. Through the concrete examples of the construction of server virtualization platform in hospital, it introduces the architecture design and realization in detail, to guarantee the high availability and continuity of hospital service.

The performance for background server is higher required for mobile terminal application software, compared to the requirements of performance for application software. This paper focuses on the research about script design method, which is used for performance test of mobile terminal application sever based on LoadRunner. Firstly it analyzes the problems of recording script directly based on LoadRunner, then proposes a packet capturing method for script design based on the tool of Fiddler. It is verified that the method can be used in the performance test of mobile terminal application sever based on LoadRunner efficiently by the practice result.

Aiming at the features of the course of computer network safety such as wide coverage and abstract theory and through the research on the practical teaching, this thesis designs the experimental items for students which can not only let them master the basic theories better, but also effectively improve practical level of safety technology.

With the introduction of SaaS and Guangzhou education and research network, aiming at the characteristics of large populations of users and higher similarity of business in Guangzhou education and research network, this paper proposes the education management platform based on SaaS, and describes the platform service model, features, architecture, database and advantages, hoping to provide a reference for the education sector in developing information technology and improving the efficiency of education and research network.

】By analyzing the current issue of computer-related professional qualification certificates，we add the well-known corporate training certification to integrated teaching reform. The dual certificate integration skills course is conducive to the major of computer network in technician institute.

Advances in cloud technology promote the development of e-government cloud, greatly improving the level and efficiency of domestic e-government. As the increasing requirement of informatization construction quality, e-government cloud testing becomes an integral part of the construction of e- government cloud. However, the cloud testing research is relatively limited. Through analysis of the typical e-government cloud architecture, this paper respectively discusses the main test content of e-government cloud, including computer room environment testing, server testing, cloud core LAN testing, cloud scheduling software testing, optical fiber network testing. And the key content of the test are discussed.

In order to draw combination line symbol which has an offset property value during the development of symbol base of geographical information system(GIS) platform, an algorithm generating parallel polyline is put forward in the paper. The vector algebra is used to simplify the calculating process by generating a new point set after offsetting. Accordingly it improves the efficiency of drawing line symbol. The practice shows that the method is relatively simple in programming and it has high computing efficiency.

The university computer room has a huge number of computers and complicated software, which are frequently updated from time to time. It is concerned very much that how to manage so many computers efficiently. The virtual desktop infrastructure technique is placed much expectation on because of its feature of centralized management. However, it costs an amazing amount of computing and storage resource. It is not fit for university computer room. Against that backdrop, we explore a new management mode-virtual desktop infrastructure based on local cache, getting good using effect.

For the limitation of storage medium and transmission speed, we usually need to reduce image file size. There are two methods in Photoshop: one is to choose a lower quality compression format when storing files; the other is to reduce the number of pixels in resample image case. Most PS users don't know the difference and connection between the two methods, and how to choose according to the practical application. Also, there is lack of research on this area at home and abroad. In this paper, these two methods are analyzed in theory and effect and it cites three real examples to discuss how to choose the method according to the practical application. It has the reality guiding significance for PS users.

】The learning effect and quality of network remote training have been the problems conceded in the development of network remote education. Many network remote training systems just encapsulate the curriculum resources, and transmit to students through network. The basic thought of automatic network training is to build an automatic training environment with network technology. After choosing the learning content and learning strategy by students, the system can present the selected content according to the selected learning strategies within prescribed time.

This paper focuses on the application of internet of things technology in building integration system design, gives a brief introduction of the internet of things technology and intelligent buildings, and analyzes the technology solution and design of the building integration system, in order to provide the beneficial reference for relevant aspects.