2篇
您的检索式：作者名="Mingkun CUI"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Q-switched fiber laser based on saturable absorption of ferroferric-oxide nanoparticles显示文摘We demonstrate that ferroferric-oxide(Fe_3O_4) nanoparticles exhibit nonlinear saturable absorption property at1.55 μm, and fabricate two filmy saturable absorbers by embedding the nanoparticles into a polyvinyl alcohol(PVA) film or polyimide(PI) film separately. In the Fe_3O_4-PVA(Fe_3O_4-PI) Q-switched fiber laser, the pulse repetition rate increases from 8.5 kHz(5.5 kHz) to 28 kHz(49 kHz) and the pulse duration decreases from 23.5 μs(47 μs) to 6 μs(3.5 μs) by varying the pump power from 25 m W(23 mW) to 150 m W(650 mW). Experiment results indicate that PI-based saturable absorbers can afford larger powers than PVA-based saturable absorbers, which can be attributed to the higher fusion point of the PI film. The Fe_3O_4-PI saturable absorber exhibits features of high damage threshold, low cost, and good flexibility, which could be applied in fields of near-infrared pulse generation and frequency conversions. | Dong Mao Xiaoqi Cui Wending Zhang Mingkun Li Tianxian Feng Bobo Du Hua Lu Jianlin Zhao | 2017 | Photonics Research2017，5，1： | 3 |
| 2 | Ecological Anthropological Research on the Vertical Agriculture of Lisu People: A Case Study of Tongle Village in Weixi County of Yunnan Province显示文摘Tongle Village in Weixi County of Yunnan Province,a typical Lisu village in Lancang River basin,is located at the national protection zone of traditional culture of Lisu people and named as the ecological cultural village by UNESCO. Based on the distinctive climatic characteristics at different altitudes,Lisu people have developed an effective vertical agriculture system. They cultivate rice and wheat in the river basin at an altitude of 1 740 m; plant corns,nuts,fruits and vegetables around the village at an altitude of 1 840m and buckwheat,potato, herbs in the upper ' swidden land' at an altitude of 2 000 m. They also herd animals in the alpine meadow at an altitude of 2 500 m. Based on a fieldwork,this paper studied the vertical agriculture system by applying the theories of Ecological Anthropology and employing several field work methods such as participant observation and in-depth interviews. According to the research findings,Lisu people have not only properly utilized local natural resources,but also developed a related cultural system to facilitate their agriculture production. But the vertical system also faces great challenges with the economic and social development of local areas. To respond positively,sustainable development is a way for Lisu people to enhance their living standards and maintain their traditional culture. | Hanbai HAN Mingkun CUI Qingwen MIN | 2013 | Asian Agricultural Research2013，5，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员