Science Discovery

Volume 9, Issue 3, June 2021

  • Optimal Configuration of Wind Turbine and Photovoltaic Based on Day-ahead Economic Dispatch

    Bing Sun, Yunfei Li, Yuan Zeng

    Issue: Volume 9, Issue 3, June 2021
    Pages: 91-96
    Received: Mar. 08, 2021
    Accepted:
    Published: May 08, 2021
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    Abstract: With the gradual increase of the penetration rate of wind and photovoltaic (PV) electricity, the power system is facing great challenges in integration and peak-shaving capacity. As flexibility resources of the system is limited, wind and PV power generation will not be consumed completely. Allowing the curtailment of the peak output of wind turbin... Show More
  • Analysis on Activities of Daily Living Ability and Its Influencing Factors of the Elderly in Community

    Yifan Cao, Lingshan Wan, Hansheng Ding

    Issue: Volume 9, Issue 3, June 2021
    Pages: 97-100
    Received: Mar. 12, 2021
    Accepted:
    Published: May 24, 2021
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    Abstract: Objective: To understand the activities of daily living (ADL) status of the elderly in Shanghai community and its influencing factors. Methods: Cluster sampling method was used to sample 8143 elderly aged 60 or above, living in a community of Jing’an District, analyze their ADL status and its influencing factors. Results: Among the individuals, abo... Show More
  • Overview on Equipment of Distributed Proton Exchange Membrane Fuel Cell

    Junxiang Zhai, Guangli He, Congmin Liu, Zhuang Xu, Zhonghui Tian

    Issue: Volume 9, Issue 3, June 2021
    Pages: 101-107
    Received: Mar. 16, 2021
    Accepted:
    Published: May 24, 2021
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    Abstract: Distributed proton exchange membrane fuel cell (PEMFC) is one of choices for distributed power equipment, which is efficient, eco-friendly, reliable and responsive. They can be used in different occasions such as house, communication stations and chemical industry. This paper introduces combined heat and power (CHP), backup power and stationary pow... Show More
  • Inspection and Analysis of Air Quality Forecast Effect by Using 4 Years Data in Ningxia Base on the Newest National Standard

    Shao Jian, Yang Yuanyuan, Chen Min, Du QingYang

    Issue: Volume 9, Issue 3, June 2021
    Pages: 108-113
    Received: Mar. 26, 2021
    Accepted:
    Published: May 24, 2021
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    Abstract: In this paper, the characteristics of air quality index, air quality grade, pollutant concentration and the type of primary pollutant were tested, and the forecast result was analyzed by the daily observe and forecast data of air quality index, concentration of pollutants, primary pollutant types in Yinchuan from January 1st 2015 to December 31th 2... Show More
  • Simulation Study on Blast Resistance Test of Blast Wall Based on LS-DYNA Coupling Method

    Zhu Gan, Ding Jianguo

    Issue: Volume 9, Issue 3, June 2021
    Pages: 114-120
    Received: Apr. 14, 2021
    Accepted:
    Published: May 24, 2021
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    Abstract: In order to study the pressure change with time at the blast face of the blast resistant wall when the shock wave acts on the blast resistant wall after the explosion of TNT explosive, the equivalent model of the blast resistant wall is designed based on the similarity theory, and the TNT near ground explosion test is carried out. During the test, ... Show More
  • Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire

    Jiarun Song, Xuehong Li, Weiqing Liu

    Issue: Volume 9, Issue 3, June 2021
    Pages: 121-127
    Received: Apr. 19, 2021
    Accepted:
    Published: May 24, 2021
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    Abstract: Relying on the joint research project, research is carried out on the ultimate mechanical characteristics of suspension bridge slings under high temperature fire. The establishment of a local transient temperature field heat transfer model based on the FDS software, and the analysis of the temperature distribution law of the fire source at differen... Show More
  • Synthesis and Characterization of a Carborane-containing Precursor for B4C Ceramics

    Dexuan Yan, Jiahui Chen, Yu Zhang, Yanzi Gou

    Issue: Volume 9, Issue 3, June 2021
    Pages: 128-132
    Received: Apr. 15, 2021
    Accepted:
    Published: May 24, 2021
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    Abstract: B4C ceramic is one of widely used ceramics with properties of low density, high hardness, high thermal-stability and high neutron absorption cross-section. However, the high melting point and high hardness of B4C make it difficult to be prepared as materials with complex shape. Precursor derived method is an effective approach to prepare special-sh... Show More