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26 results on '"尹 娟"'

1. 不同生育时期膜下滴灌谷子叶面积折算系数和叶面积指数的变化规律.

Author

卓宝著, 尹 娟, 徐利岗, and 王 文

Abstract

Aiming at the problems of low single industrial benefit, serious shortage of water resources and low utilization rate of water resources in Hongsipu District of Wuzhong City, taking drip irrigation of millet under plastic film as the research object, the change laws of leaf area conversion factor and leaf area index（LAI） of millet under drip irrigation under plastic milk in different growth periods were studied by using the data in 2022. The results showed that the leaf area conversion factor of millet in four growth stages were 1.42, 1.50, 1.53 and 1.50 respectively. After verification, R² were 0.997, 0.991, 0.986 and 0.990 respectively, and Nash efficient coefficient were 0.992, 0.989, 0.979 and 0.984 respectively. The simulation results of leaf area conversion factor were good. The leaf area index in the whole test area in different periods showed the variation laws of gradual growth and the growth rate gradually decreased. The leaf area index in the grain-filling maturity stage was 6.96. The leaf area index under different test treatments showed the variation of increase. The leaf area index under J90, Q110, B110, J110, B130, J130 and B150 treatments showed a negative increasing trend in the late growth period. The leaf area index in filling and mature stage under B110, B130, B150 treatments was reasonable. Under the high-yield irrigation system, the average grain yield first decreased and then increased as the leaf area index increased. The above results provided some reference basis for the leaf area measurement and the related study with the leaf area index and yield. [ABSTRACT FROM AUTHOR]

Published
2023
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2. 不同光质与光周期对粗肋草生长、叶片色素和颜色的影响.

Author

李文杨, 张光辉, 李月凤, 梁祥鹏, and 尹 娟

Subjects
LEAF color, PLANT biomass, PRINCIPAL components analysis, LEAF growth, BLUE light, APPLES
Abstract

Copyright of Guihaia is the property of Guihaia Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023
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9. Optimal Design of Narrowband Filter in Oblique Incidence Based on Genetic Arithmetic

Author

尹娟娟 Yin Juanjuan, 俞侃 Yu Kan, 包佳祺 Bao Jiaqi, 张晓丹 Zhang Xiao-dan, and 廖剑锋 Liao Jian-feng

Subjects
Optimal design, Materials science, genetic structures, business.industry, Polarization (waves), Atomic and Molecular Physics, and Optics, Wavelength, Optics, Narrowband, Genetic arithmetic, sense organs, Rectangle, Oblique incidence, Thin film, business
Abstract

According to the polarization characteristics of the thin film narrowband filter,the stack of narrowband filter used in oblique incidence is provided based on the genetic arithmetic in this paper.A 100GHz five-cavity thin film filter used in 18° incidence is optimized based on the programme.The stack can eliminate the phenomenon of polarization light central wavelength separation used in oblique incidence and it has low polarization dependent loss.It can be used as an angle-tuned thin film filter for wavelength modulation.Compared with the thin film filter stack obtained by needle arithmetic design,it has higher rectangle degree,larger wavelength tunable range and less polarization dependent loss.The experimental results show it meets the demand of design and its tunable range is more than 25 nm.

Published
2013

10. Spontaneous Parametric down Conversion in Type-I BBO Crystal Pumped by Femtosecond Pulses

Author

包佳祺 Bao Jiaqi, 尹娟娟 Yin Juanjuan, and 俞侃 Yu Kan

Subjects
Materials science, Physics::Instrumentation and Detectors, Femtosecond pulse, business.industry, Energy conversion efficiency, Physics::Optics, Conical surface, Polarization (waves), Atomic and Molecular Physics, and Optics, Wavelength, Optics, Spontaneous parametric down-conversion, Femtosecond, business, Phase matching
Abstract

Spontaneous parametric down conversion of the femtosecond pulse with a type-I β-barium borate(BBO) crystal was studied experimentally,which induced to the generation of colored conical emission(CCE).The influence of parametrics on the conversion efficiency and the characteristics of CCE was discussed in detail.Experimental results show that the green conical emission has the biggest divergence angle,which is consistent with the calculation results based on the phase matching condition.When the pumped beam is incident on-axis,the intensity of the CCE will become stronger with the increase of the pump intensity and the thickness of crysta,and the center wavelength of the biggest diverging angle conical emission will change toward long wave.CCE and super-continuum emission can also be observed with different polarization directions.

Published
2011

11. Transmitting Intensity Distribution After a Guassian Beam Incident Obliquely on a Narrowband Filter

Author

尹娟娟 Yin Juanjuan, 俞侃 Yu Kan, 黄德修 Huang Dexiu, 吉紫娟 Ji Zijuan, and 包佳祺 Bao Jiaqi

Subjects
Physics, Beam diameter, business.industry, Interference (wave propagation), Atomic and Molecular Physics, and Optics, Narrowband, Optics, Filter (video), Physics::Accelerator Physics, M squared, Laser beam quality, business, Beam (structure), Computer Science::Information Theory, Gaussian beam
Abstract

Based on the multi-beam interference principle,a transmitting intensity expression of a Gaussian beam incidenting obliquely on an angle-tuned narrowband filter is derived.According to the result,the influence of the incidence angle on the transmission of a Gaussion beam is investigated theoretically.The calculation and experiment results show that the size of the transmitting beam spot is brodened obviously in oblique incidence.When the incident angle of the thin-film filter is relatively small,the position of the peak of the transmitting beam is shifted and the beam is not in Gaussian distribution.When the incident angle of the filter is relatively large,the transmitting beam consists of a series of space-separated beams.

Published
2010

12. Reflecting Intensity Distribution on the Angle-Tuned Filter in Oblique Incidence

Author

常进 Chang Jin, 俞侃 Yu Kan, 尹娟娟 Yin Juanjuan, 包佳祺 Bao Jiaqi, 周坤 Zhou Kun, and 黄德修 Huang Dexiu

Subjects
Materials science, Optics, Distribution (number theory), business.industry, Tuned filter, Electrical and Electronic Engineering, Oblique incidence, business, Atomic and Molecular Physics, and Optics, Intensity (heat transfer), Electronic, Optical and Magnetic Materials
Published
2010

16. Investigation of Colored Conical Emission in β-Barium Borate Crystal

Author

俞侃 Yu Kan, 尹娟娟 Yin Juanjuan, and 包佳祺 Bao Jiaqi

Subjects
Crystal, chemistry.chemical_compound, Crystallography, Materials science, chemistry, Colored, Conical surface, Electrical and Electronic Engineering, Barium borate, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2013

21. Reflected-Intensity Distribution of a Thin-Film Filter with Oblique Incidence of a Gaussian Beam Under-Parallel Case

Author

俞侃 Yu Kan, 尹娟娟 Yin Juanjuan, 黄德修 Huang Dexiu, and 包佳祺 Bao Jiaqi

Subjects
Optics, Distribution (mathematics), Materials science, business.industry, Filter (video), Electrical and Electronic Engineering, Oblique incidence, Thin film, business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Gaussian beam, Intensity (physics)
Published
2012

24. Transmitted-Intensity Distribution of a Narrowband Thin-Film Filter with Oblique Incidence of Guassian Beam under Non-parallel Case

Author

吉紫娟 Ji Zijuan, 俞侃 Yu Kan, 包佳祺 Bao Jiaqi, 尹娟娟 Yin Juanjuan, and 黄德修 Huang Dexiu

Subjects
Distribution (mathematics), Optics, Narrowband, Materials science, business.industry, Filter (video), Oblique incidence, Thin film, business, Atomic and Molecular Physics, and Optics, Beam (structure), Electronic, Optical and Magnetic Materials, Intensity (physics)
Published
2011

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