【The Mechanical Characteristics and Experimental Study of the Stratospheric Airship】
Stratospheric airship is a special near-space air vehicle and can be an ideal stratospheric bearing platform. This paper first summarized the technical difference between stratospheric airship and traditional airship, discussed the technical difficulties of stratospheric airship, including material, deformation, temperature effect, energy system, etc., and carried out experiments. Finally obtained the relevant parameters of stratospheric airship design, and forecasted the development direction.
DOI: 10.4236/jamp.2021.91013
https://t.cn/A65TmMBF
Stratospheric airship is a special near-space air vehicle and can be an ideal stratospheric bearing platform. This paper first summarized the technical difference between stratospheric airship and traditional airship, discussed the technical difficulties of stratospheric airship, including material, deformation, temperature effect, energy system, etc., and carried out experiments. Finally obtained the relevant parameters of stratospheric airship design, and forecasted the development direction.
DOI: 10.4236/jamp.2021.91013
https://t.cn/A65TmMBF
【Relationship between the Northern Hemisphere Sea Ice Area and Global Temperature by Multifractal Analysis】
Sea ice is a critical component of the climate system because it strongly influences albedo, surface turbulent heat fluxes, surface wind drag, and upper-ocean stratification. Multifractal is a non-uniform, more complex fractal and is separated into many sub-sets characterized through different fractal dimensions. Studies show that climate change can be interpreted from the view of fractals. A change in fractality may be observed when the climate changes. To study the relations among the Northern Hemisphere (NH) sea ice area, solar activity, global temperature, and Pacific Decadal Oscillation (PDO), this paper investigated changes in the fractal behavior of these time series by multifractal analysis.
DOI: 10.4236/jamp.2020.85069 https://t.cn/A657XQ8T
Sea ice is a critical component of the climate system because it strongly influences albedo, surface turbulent heat fluxes, surface wind drag, and upper-ocean stratification. Multifractal is a non-uniform, more complex fractal and is separated into many sub-sets characterized through different fractal dimensions. Studies show that climate change can be interpreted from the view of fractals. A change in fractality may be observed when the climate changes. To study the relations among the Northern Hemisphere (NH) sea ice area, solar activity, global temperature, and Pacific Decadal Oscillation (PDO), this paper investigated changes in the fractal behavior of these time series by multifractal analysis.
DOI: 10.4236/jamp.2020.85069 https://t.cn/A657XQ8T
【气候变化对国家脆弱性评估的影响】气候变化的破坏可能造成社会和政府结构的削弱和崩溃。在本研究中，研究人员选择了温度和降雨量作为气候变化指标，建立了气候变化综合评价模型；并选取了六个具有代表性的国家，应用建立的模型分析了气候变化对国家脆弱性影响的程度和途径，还利用BP (back propagation, BP)神经网络对状态的脆弱性进行了预测。此外，他们还分析了人为干预提高国家脆弱性对国家GDP总量的影响。相关研究论文已发表在《Journal of Applied Mathematics and Physics》上。DOI: 10.4236/jamp.2020.811181 https://t.cn/A6G3Vbv0
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