There are so many Isolated Islands (inhabited islands) in the world, including Japan. However, at present islanders, there have been faced with the decline of industries, serious concerns of rapid aging and very low b...There are so many Isolated Islands (inhabited islands) in the world, including Japan. However, at present islanders, there have been faced with the decline of industries, serious concerns of rapid aging and very low birthrate without children and water scarcity issues etc. It can be said that these situations are under the environment which shows a microcosm of Japanese and/or world survival society in the near future. In this paper, the experimental data on the reduction of the mixed water (seawater & rainwater) salinity by the sound wave when changing the volume ratio were first shown, taking into the characteristics of the Isolated Islands. Next, the main analysis result on the water qualities of mixed water with which sound wave was irradiated was shown and the consideration mainly based on the WHO drinking water quality standards was carried out. Finally, through a simple water quality improvement apparatus using small hydroelectric power, a consideration regarding a possibility of the purification of the water (to be a drinking water) based on the solar circulation energy (regenerative type’s natural energy) such as small hydropower utilization, natural sunlight utilization, natural gravity utilization, natural oscillation utilization has been described in the paper.展开更多
The characteristics of the urban heat island effect and the climate change in Shanghai and its possible mechanism are analyzed based on monthly meteorological data from 1961 to 1997 at 16 stations in Shanghai and its ...The characteristics of the urban heat island effect and the climate change in Shanghai and its possible mechanism are analyzed based on monthly meteorological data from 1961 to 1997 at 16 stations in Shanghai and its adjacent areas. The results indicate that Shanghai City has the characteristics of a heat island of air temperature and maximum and minimum air temperature, a cold island of surface soil temperature, a weak rainy island of precipitation, and a turbid island of minimum visibility and aerosols, with centers at or near Longhua station (the urban station of Shanghai). Besides theses, the characteristics of a cloudy island and sunshine duration island are also obvious, but their centers are located in the southern part of the urban area and in the southern suburbs. A linear trend analysis suggests that all of the above urban effects intensified from 1961 to 1997. So far as the heat island effect is concerned, the heat island index (difference of annual temperature between Longhua and Songjiang s展开更多
The reason why the Changxing Island should be the water resource island of Shanghai City is dis-cussed based on the analysis of the natural conditions of the island. Tentative ideas on engineering design and suggestio...The reason why the Changxing Island should be the water resource island of Shanghai City is dis-cussed based on the analysis of the natural conditions of the island. Tentative ideas on engineering design and suggestions for pre-engineering study are proposed.展开更多
Random amplified polymorphic DNA (RAPD) markers were used to analyze genetic variation of Podocarpus imbricatus in Hainan Island and Mainland of China. Two populations of Dacrydium pierrei were used as comparison mate...Random amplified polymorphic DNA (RAPD) markers were used to analyze genetic variation of Podocarpus imbricatus in Hainan Island and Mainland of China. Two populations of Dacrydium pierrei were used as comparison materials. Both Podocarpus imbricatus and Dacrydium pierrei showed a low level of genetic diversity. However, Podocarpus imbricatus showed higher genetic diversity and higher population differentiation than Dacrydium pierrei. The geographic range may affect the genetic diversity of Podocarpus imbricatus and Dacrydium pierrei significantly. The UPGMA cluster tree showed that populations of Podocarpus imbricatus in Hainan Island and Guangxi Zhuang Autonomous Region were closer than those in Yunnan Province, indicating possible gene flow between Hainan Island and Guangxi Zhuang Autonomous Region. The young geological history of Hainan Island and the three times of unification and separation between Hainan Island and the Mainland may give the two species more possibilities of gene flow.展开更多
为评估孤岛型微电网的可靠性以及分析储能装置对系统可靠性的影响,提出基于序贯蒙特卡洛模拟法的孤岛微电网可靠性评估方案。首先,以孤岛型风柴储混合微电网系统作为研究对象,搭建分布式电源等关键设备的出力模型;其次,制定可靠性评估...为评估孤岛型微电网的可靠性以及分析储能装置对系统可靠性的影响,提出基于序贯蒙特卡洛模拟法的孤岛微电网可靠性评估方案。首先,以孤岛型风柴储混合微电网系统作为研究对象,搭建分布式电源等关键设备的出力模型;其次,制定可靠性评估指标体系、不同的储能运行策略及负荷削减策略,在此基础上提出基于序贯蒙特卡洛模拟法的孤岛风柴储微电网可靠性评估算法;最后,通过对改进的RBTS Bus 6 F4孤岛系统进行仿真,量化分析了储能装置的运行策略、储能容量、容量配置对系统可靠性水平的影响。结果表明:合理的储能策略、适当增大储能容量以及适宜的储能系统配置方案等均可提高系统可靠性。展开更多
文摘There are so many Isolated Islands (inhabited islands) in the world, including Japan. However, at present islanders, there have been faced with the decline of industries, serious concerns of rapid aging and very low birthrate without children and water scarcity issues etc. It can be said that these situations are under the environment which shows a microcosm of Japanese and/or world survival society in the near future. In this paper, the experimental data on the reduction of the mixed water (seawater & rainwater) salinity by the sound wave when changing the volume ratio were first shown, taking into the characteristics of the Isolated Islands. Next, the main analysis result on the water qualities of mixed water with which sound wave was irradiated was shown and the consideration mainly based on the WHO drinking water quality standards was carried out. Finally, through a simple water quality improvement apparatus using small hydroelectric power, a consideration regarding a possibility of the purification of the water (to be a drinking water) based on the solar circulation energy (regenerative type’s natural energy) such as small hydropower utilization, natural sunlight utilization, natural gravity utilization, natural oscillation utilization has been described in the paper.
基金supported the National Natural Science Foundation of China under Grant No.49899270.
文摘The characteristics of the urban heat island effect and the climate change in Shanghai and its possible mechanism are analyzed based on monthly meteorological data from 1961 to 1997 at 16 stations in Shanghai and its adjacent areas. The results indicate that Shanghai City has the characteristics of a heat island of air temperature and maximum and minimum air temperature, a cold island of surface soil temperature, a weak rainy island of precipitation, and a turbid island of minimum visibility and aerosols, with centers at or near Longhua station (the urban station of Shanghai). Besides theses, the characteristics of a cloudy island and sunshine duration island are also obvious, but their centers are located in the southern part of the urban area and in the southern suburbs. A linear trend analysis suggests that all of the above urban effects intensified from 1961 to 1997. So far as the heat island effect is concerned, the heat island index (difference of annual temperature between Longhua and Songjiang s
文摘The reason why the Changxing Island should be the water resource island of Shanghai City is dis-cussed based on the analysis of the natural conditions of the island. Tentative ideas on engineering design and suggestions for pre-engineering study are proposed.
基金the National Natural Science Foundation of China (Grant No.39830310)
文摘Random amplified polymorphic DNA (RAPD) markers were used to analyze genetic variation of Podocarpus imbricatus in Hainan Island and Mainland of China. Two populations of Dacrydium pierrei were used as comparison materials. Both Podocarpus imbricatus and Dacrydium pierrei showed a low level of genetic diversity. However, Podocarpus imbricatus showed higher genetic diversity and higher population differentiation than Dacrydium pierrei. The geographic range may affect the genetic diversity of Podocarpus imbricatus and Dacrydium pierrei significantly. The UPGMA cluster tree showed that populations of Podocarpus imbricatus in Hainan Island and Guangxi Zhuang Autonomous Region were closer than those in Yunnan Province, indicating possible gene flow between Hainan Island and Guangxi Zhuang Autonomous Region. The young geological history of Hainan Island and the three times of unification and separation between Hainan Island and the Mainland may give the two species more possibilities of gene flow.
文摘为评估孤岛型微电网的可靠性以及分析储能装置对系统可靠性的影响,提出基于序贯蒙特卡洛模拟法的孤岛微电网可靠性评估方案。首先,以孤岛型风柴储混合微电网系统作为研究对象,搭建分布式电源等关键设备的出力模型;其次,制定可靠性评估指标体系、不同的储能运行策略及负荷削减策略,在此基础上提出基于序贯蒙特卡洛模拟法的孤岛风柴储微电网可靠性评估算法;最后,通过对改进的RBTS Bus 6 F4孤岛系统进行仿真,量化分析了储能装置的运行策略、储能容量、容量配置对系统可靠性水平的影响。结果表明:合理的储能策略、适当增大储能容量以及适宜的储能系统配置方案等均可提高系统可靠性。
