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近40年来全球气候变化研究已经是当今自然科学重大课题之一,中国的区域响应也日渐引人关注。依据黑龙江、新疆、西藏三省区93个国家基准或基本气象站1961-2008年间的日降水数据,就中国气候变化敏... more 近40年来全球气候变化研究已经是当今自然科学重大课题之一,中国的区域响应也日渐引人关注。依据黑龙江、新疆、西藏三省区93个国家基准或基本气象站1961-2008年间的日降水数据,就中国气候变化敏感区降水变化过程和波动特征进行了对比分析。①年降水量上,黑龙江微弱减少,新疆增多、西藏明显增多,特别是1995年以来其趋势更加显著,且后两者线性变化趋势均通过了α=0.01的统计检验;②冬春两季,三省区的降水量都呈现增长态势,但春季以新疆最弱、黑龙江次之、西藏最强为序,而冬季则相反,而且其线性变化趋势基本都达到了α=0.05的显著水平;③夏秋两季,三省区的降水量值分别为黑龙江微弱减少、新疆微弱增多、西藏增多,但线性变化趋势并不显著;④三省区气象站点降水线性变化趋势显著性对比上,黑龙江冬季61.5%的气象站、西藏春季64.7%的气象站、新疆年总量50%的气象站点通过α=0.05的最低统计检验;⑤无论年降水总量还是不同季节降水量的年际波动量值均以新疆和黑龙江明显、西藏相对平稳为特征。
2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), 2019
Thermoelectric effect can be a promising candidate as a sustainable energy source for internet of... more Thermoelectric effect can be a promising candidate as a sustainable energy source for internet of things devices. In this regards, thin films of organic-inorganic hybrid halide-perovskites, Methylamonium tin iodide, were fabricated by spin coating technique on a glass substrate. Thin films were structurally and chemically characterized by x-ray diffraction pattern and scanning electron microscope. Thermoelectric parameters were measured near room temperature. Thin films heated for 5 min at 100°C shows the best performance with electrical conductivity 2.4 S/cm, Seebeck coefficient 65muV/K65 \mu V/K65muV/K and power factor of 1.0muW/mcdotK21.0 \mu W/m \cdot K^{2}1.0muW/mcdotK2. Thermoelectric performance from these hybrid-halide perovskite will help for further development of direct thermal energy harvesting devices near room temperature.
近40年来全球气候变化研究已经是当今自然科学重大课题之一,中国的区域响应也日渐引人关注。依据黑龙江、新疆、西藏三省区93个国家基准或基本气象站1961-2008年间的日降水数据,就中国气候变化敏... more 近40年来全球气候变化研究已经是当今自然科学重大课题之一,中国的区域响应也日渐引人关注。依据黑龙江、新疆、西藏三省区93个国家基准或基本气象站1961-2008年间的日降水数据,就中国气候变化敏感区降水变化过程和波动特征进行了对比分析。①年降水量上,黑龙江微弱减少,新疆增多、西藏明显增多,特别是1995年以来其趋势更加显著,且后两者线性变化趋势均通过了α=0.01的统计检验;②冬春两季,三省区的降水量都呈现增长态势,但春季以新疆最弱、黑龙江次之、西藏最强为序,而冬季则相反,而且其线性变化趋势基本都达到了α=0.05的显著水平;③夏秋两季,三省区的降水量值分别为黑龙江微弱减少、新疆微弱增多、西藏增多,但线性变化趋势并不显著;④三省区气象站点降水线性变化趋势显著性对比上,黑龙江冬季61.5%的气象站、西藏春季64.7%的气象站、新疆年总量50%的气象站点通过α=0.05的最低统计检验;⑤无论年降水总量还是不同季节降水量的年际波动量值均以新疆和黑龙江明显、西藏相对平稳为特征。
2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), 2019
Thermoelectric effect can be a promising candidate as a sustainable energy source for internet of... more Thermoelectric effect can be a promising candidate as a sustainable energy source for internet of things devices. In this regards, thin films of organic-inorganic hybrid halide-perovskites, Methylamonium tin iodide, were fabricated by spin coating technique on a glass substrate. Thin films were structurally and chemically characterized by x-ray diffraction pattern and scanning electron microscope. Thermoelectric parameters were measured near room temperature. Thin films heated for 5 min at 100°C shows the best performance with electrical conductivity 2.4 S/cm, Seebeck coefficient 65muV/K65 \mu V/K65muV/K and power factor of 1.0muW/mcdotK21.0 \mu W/m \cdot K^{2}1.0muW/mcdotK2. Thermoelectric performance from these hybrid-halide perovskite will help for further development of direct thermal energy harvesting devices near room temperature.