Science Discovery

Volume 5, Issue 5, October 2017

  • Optimization of the Culture Conditions of Kombucha Cellulose by Response Surface Methodology

    Liu Yan, Dai Xujie

    Issue: Volume 5, Issue 5, October 2017
    Pages: 307-311
    Received: Jul. 19, 2017
    Accepted:
    Published: Jul. 19, 2017
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    Abstract: Kombucha cellulose is a kind of secondary metabolites produced by microorganisms. It is a kind of extracellular polysaccharide which is linked with β-1,4 glycosides. Compared with lignocellulose, it is the key focus of the current research in society, with a complex three dimensional reticular structure,material-combining ability, good biocompatibi... Show More
  • The Study of Based on RAPD Molecular Markers in Celery Cultivars Relationship

    Liu Pangyuan, Zhang Baohai, Zhao Hong, He Weiming, Wang Huijie

    Issue: Volume 5, Issue 5, October 2017
    Pages: 312-316
    Received: Aug. 01, 2017
    Accepted:
    Published: Aug. 04, 2017
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    Abstract: In this study, from forty different varieties of celery in different regions of China as test material, the scientific character of RAPD technology in the identification of celery cultivars was carried out in the verification and analysis technology. The results show that the RAPD can well distinguish the genetic relationship of celery varieties of... Show More
  • The Current Situation and Expectation of Beijing Vegetable Germplasm Resources

    Liu Pangyuan, He Weiming, Zhang Baohai

    Issue: Volume 5, Issue 5, October 2017
    Pages: 317-320
    Received: Aug. 01, 2017
    Accepted:
    Published: Aug. 04, 2017
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    Abstract: This paper introduces the domestic and international situation and development trend of resource conservation, analyzed the current situation, existing problems and strategies for solving problems. for Beijing germplasm of vegetables resources. We should accentuate the consciousness and the important action of resource conservation, germplasm colle... Show More
  • The Reserch of Network User Account Security Problems and Solutions

    Wang Chen, Li Jianbei, Li Shucheng, Wang Yinhui

    Issue: Volume 5, Issue 5, October 2017
    Pages: 321-326
    Received: Aug. 01, 2017
    Accepted:
    Published: Aug. 04, 2017
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    Abstract: To improve the network service market, improve the information monitoring and filtering mechanism, to strengthen a sense of prevent and identify consciousness, using the security technology to protect the user's account. Proposed involving various types account detailed feasible safety protection scheme. Network user account security problems can b... Show More
  • Building a Lifelong Education System to Promote the Popularization of Computer Education in Anshun

    Chunhua Lu, Xinhua Lu, Fusong Chen, Chuanhong Du

    Issue: Volume 5, Issue 5, October 2017
    Pages: 327-330
    Received: Aug. 01, 2017
    Accepted:
    Published: Aug. 04, 2017
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    Abstract: With the rapid development in the era of information, computer technology has become more and more important in the development of society, and the traditional one-time computer education cannot meet the learning needs of people, while the lifelong education gradually get widely well- known. Based on the computer education status of Anshun city now... Show More
  • Research on Universal Processing Framework of Multi-source Heterogeneous Data Integration in GIS Domain Based on Software Technology

    Xu Qiang, Fan Hong, Dang XiaoHu

    Issue: Volume 5, Issue 5, October 2017
    Pages: 331-339
    Received: Aug. 07, 2017
    Accepted:
    Published: Aug. 07, 2017
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    Abstract: It is difficult to make fine-grained random call in GIS system development or data processing owing to the multi-source heterogeneity of spatial data. Moreover, to convert the data into a unified format easily can lead to the loss of the core attributes. In this paper, we discuss the translation methods among several different data formats, includi... Show More
  • A Method of Building 3D Vector Model for Plant Root

    Chen Fuqiang, Zhou Xuecheng, Yang Zishang, Wang Gaofeng

    Issue: Volume 5, Issue 5, October 2017
    Pages: 340-347
    Received: Aug. 07, 2017
    Accepted:
    Published: Aug. 07, 2017
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    Abstract: In order to achieve quantitative description and analysis of root architecture, a 3D vector model building method for plant root was proposed. Firstly, three data structures of root node, root branch and root system are designed. Secondly, according to the linear characteristic of root, the root skeleton points are extracted by the slice algorithm.... Show More
  • Quasi-cyclic Expansion Algorithm for Protograph LDPC Codes Based on PEG and PH

    Ruiyan Du, Qingping Zhou, Fulai Liu, Dong Wang

    Issue: Volume 5, Issue 5, October 2017
    Pages: 348-354
    Received: Aug. 13, 2017
    Accepted:
    Published: Aug. 14, 2017
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    Abstract: One of the important code of modern coding theory, the protograph LDPC code technology has been gained more and more attention due to its low encoding complexity, fast decoding speed, low BER, and simple optimization analysis process etc. the quasi-cyclic expansion algorithm of the protograph LDPC codes, named as PQCE algorithms, can complete the e... Show More
  • Research on Spectrum Resources Spatial Reuse Algorithm Based on Game Theory in Cognitive Radio

    Fulai Liu, Zhenxing Sun, Ruiyan Du, Lei Shi

    Issue: Volume 5, Issue 5, October 2017
    Pages: 355-361
    Received: Aug. 13, 2017
    Accepted:
    Published: Aug. 17, 2017
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    Abstract: In cognitive radio system, spectrum reuse is one of the main methods to improve the utilization of spectrum resources. Nevertheless, it has been unable to further improve spectrum efficiency that the reuse is implemented exclusively from the dimension of frequency. Taking account of the problem of spectrum resource spatial reuse in addition to the ... Show More
  • The Affected Analysis of Pipeline Thermal Stress Under Different Support Conditions and Wall Thickness Based on Finite Element Simulation

    Sun Ying, Lv Chao

    Issue: Volume 5, Issue 5, October 2017
    Pages: 362-368
    Received: Aug. 13, 2017
    Accepted:
    Published: Aug. 17, 2017
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    Abstract: When gas transmission pipelines are working, due to being heated or cold and expansion and contraction, the pipes will produce thermal stress. Thus the stress poses a threat to pipeline working. Therefore, this article will adopt the method of model simulation and establish a channel space finite element model, then the ANSYS finite element analysi... Show More
  • Overview of Improved Particle Filter Based on Integrated Navigation System

    Xiao Jing Du, Cong Liu, Shao Yong Hu, Huai Jian Li

    Issue: Volume 5, Issue 5, October 2017
    Pages: 369-374
    Received: Sep. 12, 2017
    Accepted:
    Published: Sep. 14, 2017
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    Abstract: Particle filter has some advantages in dealing with the problems of the state equation nonlinear and noise distribution non Gauss in Integrated Navigation System. The summary for improved method of particle filter would be beneficial to study the application of particle filter in integrated navigation field deeply and overcome the problems of parti... Show More
  • Comparison of Random Error Analysis Methods for Fiber Optic Gyro Based on Allan Variance

    Du Xiao Jing, Zeng Chun, Li Huai Jian

    Issue: Volume 5, Issue 5, October 2017
    Pages: 375-379
    Received: Sep. 12, 2017
    Accepted:
    Published: Sep. 14, 2017
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    Abstract: It is an effective method to improve the performance of inertial instrument and the accuracy of inertial navigation system by analyzing the random drift of FOG (Fiber Optic Gyro). Allan variance FOG random error analysis method, through analyze and compare Allan variance of the original data, you can correctly evaluate the gyroscope performance ind... Show More
  • Research on Coupling of Low Speed Straight-Flow Wind Tunnel Based on Ansys Workbench

    Zhang Yifei, Qiu Rongkai, Shen Jiang

    Issue: Volume 5, Issue 5, October 2017
    Pages: 380-384
    Received: Sep. 12, 2017
    Accepted:
    Published: Sep. 14, 2017
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    Abstract: Introduction of research on coupling of low speed straight-flow wind tunnel based on ANSYS Workbench. Wind tunnel is a most important test method of aerodynamics research, in which the air velocity field and pressure field determine the test research level. A computational fluid dynamics simulation based on ANSYS Fluent is conducted on wind tunnel,... Show More
  • Progress and Prospect of Research on Autonomous Vehicle

    Pan Yuyan, Shi Jianjun, Shi Zeyu

    Issue: Volume 5, Issue 5, October 2017
    Pages: 385-389
    Received: Sep. 12, 2017
    Accepted:
    Published: Sep. 14, 2017
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    Abstract: The paper system combs the related concepts of autonomous vehicles, and describes the demarcation criteria of automatic driving vehicles. Summed up the status quo at home and abroad research, analyzes the existing problems and research methods. And its future development trend is forecasted.
  • Case Analysis of Seismic Reinforcement of Historical Buildings----Based on Reinforced Concrete Frame Structure

    Fan Tingting, Hong Yan, Liu Weidong

    Issue: Volume 5, Issue 5, October 2017
    Pages: 390-398
    Received: Sep. 12, 2017
    Accepted: Sep. 14, 2017
    Published: Sep. 18, 2017
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    Abstract: China has a long history and has survived many excellent historical buildings, These historic buildings have inadequate capacity or do not meet the requirements of earthquake resistance and need to be reinforced. This paper briefly describes the seismic reinforcement method of concrete reinforced concrete structures at first, and then made a contra... Show More
  • Reconstruction of Village Landscape Based on the Characteristics of Ethnic Culture -- Taking Zhenshan Village in Huaxi District as an Example

    Wang Meng, Wang Hong

    Issue: Volume 5, Issue 5, October 2017
    Pages: 399-403
    Received: Sep. 12, 2017
    Accepted:
    Published: Sep. 18, 2017
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    Abstract: With the gradual improvement of the living standard, also place the new rural construction, village landscape are not so good, however, in this paper, based on the research on guiyang Huaxi Town mountain village buie minority village, village landscape restoration by national culture means reshaping, let the village landscape unique, comfort, and e... Show More