Advanced Materials Research Vols. 1049-1050

Abstract: Hadoop learners is limited by practical problems such as hardware devices, the paper intends to solve the multi-machine build Hadoop distributed cluster in VMWare virtual environment. In this paper, three hosts as an example, the research includes the design of the node and network topology, the installation and configuration of the virtual machine, SSH free password login, installation, configuration and management of Hadoop.

Abstract: ETL is a key link in the construction of data warehouse. On the base of analyzing the mainstream ETL tool Datastage, the data extraction, transformation and loading, proposes a ETL framework based on data processing, and the realization method and steps are discussed in detail. The framework uses HIVE as a data processing station, improve the operating efficiency of the file; data task according to the E, T and L three parts and hierarchical partitioning, conversion of data users to better grasp the process; development data using the configuration file of the task, the development personnel free out from the heavy code, will to shift the focus of the work to the data logical task, which has greatly improved the efficiency of development personnel data processing.

Abstract: Compared with traditional web sites, there are some new features on modern web applications, as follows: dynamic functionalities, diverse representation, uncertainty for running performance, innovative data handling and data transferring mechanism, vulnerability Subsequently, the problems in testing web application are discussed from functional testing , reliability testing and security testing. At last, in order to solve these problems,new testing methods are proposed, which are systematic web application testing method,random test methods, reliability testing methods and security testing methods.

Abstract: Question and Answer System which is designed for the course named “JAVA Program Design and Application” to solve the questions that students ask outside class uses BootStrap technology for the front layout and JSP/Servlet technology for the back-end functions. It has achieved the following functions: student users can submit questions, browse questions, search questions and reply to the questions submitted by other students; while teacher users can answer questions, browse questions, search questions and administrate the subjects of questions and the information of users. In order to use accessibly, not only the mobile website is released, but also the Apps for both Android version and IOS version are provided for users to download.

Abstract: With the enrichment and development of network applications, many websites can't quickly follow large amounts of information derived and business model changes, it often spend a lot of time, manpower and material resources to update and maintain. When the website expands, the work is more complex to integrate inside, outside network and the branch website, even integration of inside and outside network and the branch website work become more complex, even the new website maybe will be built up possibly. In order to solve these problems, the information system required to fully ensure the work efficiency. The function is complete to meet the various doorways "gatekeeper" needed for the application, and to ensure t the published information is accurate. Staff can construct a unified style powerful professional website with content management system. But they don’t need learn a complex construction technology and too much complex web language.

Abstract: This paper describes the composition and application of precision agriculture technology,combined with the national"863"project and Jilin corn production situation,analyzes the feasibility of application of computer technology in the precision agriculture in corn production,introduces the precision agriculture in Jilin Province demonstration application, which summed up Jilin province No. Thirteen Village in maize production in the first the implementation of precision agriculture technology,is important to the promotion of Jilin province and even the whole country.

Abstract: In order to realize the scientific farming modernization,standardization of production management for ginseng,ginseng production technology using the information technology to knowledge acquisition,cultivation and management,data processing,the effective sharing of information,guidance and training,enhanced the ability of the ginseng plant personnel to solve problems in production management,improving the yield and quality of ginseng,reduce the pollution of the environment.

Abstract: Wi-Fi becomes increasingly popular for people who use smart phones, tablet computers and laptops frequently. It is essentially for users to understand the security problems of Wi-Fi in order to prevent information leakage. The key wireless security standards used in IEEE 802.11 are WEP, WPA and WPA2. The main purpose of this paper is to investigate the security vulnerabilities of these three standards and attempt to conclude an optimal solution for common users.

Abstract: The data obtained by the two-way satellite time and frequency transfer (TWSTFT) and the BeiDou common view (BDCV) experiments between the National Time Service Center (NTSC) and Beijing station (BEIJ) will be compared in this paper. Results with high agreement between the two techniques will be described. Data analysis results demonstrated that the two-way satellite time and frequency transfer (TWSTFT) and the BeiDou common view (BDCV) can back up each other.

Abstract: In order to make up the real-time performance of tracking and control information database, this paper design a kind of two-layer’s real-time data storage model based on memory database and relational database. In this article, the two-layer’s real-time data storage mechanism and life cycle are expounded in detail, analyzing and inducing the real-time data characteristic and storage strategy, putting forward the memory database’s self-adaptive index algorithm of T-tree index and hash index, and introducing the database synchronization mechanism between the memory database and relational database and so on. In this way, so as to improve and optimize the real-time, reliability and security of database, provides a reliable data guarantee for future expansion of the real-time application.