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On Developing Study Motivation in English Language Teaching 被引量:2
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作者 Guochang Wang Helan Zhao 《Sino-US English Teaching》 2005年第4期61-67,共7页
Teaching activities are part of motivation in English classes. The teacher of language should have a good influence on students and develop students' keen interest in study in order to strengthen their intrinsic moti... Teaching activities are part of motivation in English classes. The teacher of language should have a good influence on students and develop students' keen interest in study in order to strengthen their intrinsic motivation, and set up some new goals for students to pursue and give the feedback to reinforce their inner drive and confidence. Thus, students will become major conductors, make full use of their potentials and enhance their study results. 展开更多
关键词 motivation feelings subject of teaching feedback goal setting
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Experimental investigation on the time-delay signature of chaotic output from a 1550 nm VCSEL subject to FBG feedback 被引量:4
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作者 Zhu-Qiang Zhong Zheng-Mao Wu Guang-Qiong Xia 《Photonics Research》 SCIE EI 2017年第1期6-10,共5页
The time-delay signature(TDS) of chaos output in a 1550 nm vertical-cavity surface-emitting laser(VCSEL) subject to fiber Bragg grating(FBG) feedback is investigated experimentally. Autocorrelation function(ACF) and m... The time-delay signature(TDS) of chaos output in a 1550 nm vertical-cavity surface-emitting laser(VCSEL) subject to fiber Bragg grating(FBG) feedback is investigated experimentally. Autocorrelation function(ACF) and mutual information(MI) are used for quantitatively identifying the TDS of chaos. For various bias currents, the TDS evolution with the feedback strength is different, as the FBG provides wavelength-selective feedback. Furthermore,based on the TDS map of the FBG feedback VCSEL(FBGF-VCSEL) in the parameter space of feedback strength and bias current, the optimal TDS suppression regions, where the dominant polarization mode of FBGF-VCSEL locates at the edge of the main lobe of FBG reflection spectrum, have been determined. Finally, for comparative purpose,the TDS of chaos in mirror feedback VCSEL(MF-VCSEL) also has been presented, and the results show that an FBGF-VCSEL possesses better TDS suppression performance than an MF-VCSEL. 展开更多
关键词 VCSEL Experimental investigation on the time-delay signature of chaotic output from a 1550 nm VCSEL subject to FBG feedback FBG time
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