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11篇 您的检索式:作者名="DU Keming"
    题名 作者 年代 出处 被引量
1Research on Critical Flow of Water under Supercritical Pressures in Nozzles显示文摘Yuzhou Chen Minfu Zhao Chunsheng Yang Keming Bi Kaiwen Du Shuming Zhang 2012Journal of Energy and Power Engineering2012,6,2:3
2A study on 'selenium-health' database in China显示文摘A database for 'Se and health' has been established using DATA-TRIEVE data management system on a VAX-11/780 computer. Over 5000 pieces of information including 300 kinds of samples from 28 provinces in China were stored. The information relates to endemk diseases such as Keshan disease, Kaschin-Beck disease, Se-poison disease, cancers, heart disease and so on. The database can be accessed through keywords: samples, province, county, analytical method and the Se-content values can be obtained in tabulated form. The output includes primary statistics of the retrieved data sets. A multi-variable statistic program package featuring in pattern recognition is attached to the system.Bai Naibin, Zhang Keming and Du MinResearch Center for Eco-environmental Sciences, Academia Sinica, Beijing,China 1989Journal of Environmental Sciences1989,1,1:2
3A segmentation method for processing greenhouse vegetable foliar disease symptom images显示文摘Uneven illumination and clutter background were the most challenging problems to segmentation of disease symptom images.In order to achieve robust segmentation,a method for processing greenhouse vegetable foliar disease symptom images was proposed in this paper.The segmentation method was based on a decision tree which was constructed by a two-step coarse-to-fine procedure.Firstly,a coarse decision tree was built by the CART(Classification and Regression Tree)algorithm with a feature subset.The feature subset consisted of color features that was selected by Pearson’s Rank correlations.Then,the coarse decision tree was optimized by pruning.Using the optimized decision tree,segmentation of disease symptom images was achieved by conducting pixel-wise classification.In order to evaluate the robustness and accuracy of the proposed method,an experiment was performed using greenhouse cucumber downy mildew images.Results showed that the proposed method achieved an overall accuracy of 90.67%,indicating that the method was able to obtain robust segmentation of disease symptom images.Juncheng Ma Keming Du Feixiang Zheng Lingxian Zhang Zhongfu Sun 2019Information Processing in Agriculture2019,6,2:2
4Critical Heat Flux with Subcooled Flowing Water in Tubes for Pressures from Atmosphere to Near-Critical Point显示文摘Yuzhou Chen Keming Bi Minfu Zhao Chunsheng Yang Kaiwen Du 2016Journal of Energy and Power Engineering2016,10,4:1
5Fiber-coupling technique with micro step-mirrors for high-power diode laser bars 显示文摘Keming Du M Baumann B Ehlers H G 1997OSA TOPS1997,10,:1
6Diode Stack End-Pumped Nd:GdVO4 Continuous Wave Slab Laser显示文摘我们报导一根二极管叠抽结束的 Nd : 有 anear-diffraction-limited 的 GdVO4 平板激光微笑。在 1064 nm 的 45.8 W 的产量力量在 147 W 的抽的力量下面被获得,与光光的变换 31.2% 的效率,和斜坡效率 is39.6% 。ZHANG Heng-Li 张怀金 LI Dai-Jun 王继扬 SHI Peng Haas Ruediger 李红霞 蒋民华 DU Keming 2005Chinese Physics Letters2005,22,9:1
7Fiber-coupling technique for high-power diode laser arrays显示文摘Treusch H G Keming Du Baumann M 1998SPIE1998,3267,:1
8Experimental Investigation on CHF of Water Flowing in Upward Tube from Subcooled to High Quality Condition显示文摘Critical heat flux experiment is performed in a tube of 8.2mm in inner diameter with 2.4min heated length.The pressure covers the ranges from 3to 21MPa,mass flux from 963to 3 883kg/(m^2·s),and outlet quality from-0.87to 0.78.For all the condition,CHF almost goes up linearly while mass flux or inlet subcooling increases,YANG Bing ZHAO Minfu BI Keming ZHANG Dongxu DU Kaiwen 2017Annual Report of China Institute of Atomic Energy2017,,1:0
9An Experimental Research of Natural Circulation Heat Transfer for PRHR Heat Exchanger in AP1000显示文摘Minghui Duan Yuzhou Chen Yvfeng Lv Weiqing Li Keming Bi Wei Wang Kaiwen Du Han Wang 2016Journal of Energy and Power Engineering2016,10,9:0
10Diode-end-pumped 1D top-hat Nd:YVO_4 slab laser显示文摘A one-dimensional(1D) top-hat,diode-end-pumped,electro-optically Q-switched Nd:YVO4 slab laser is demonstrated.Under the pump power of 175.5 W,26.3-W output power is obtained with the repetition rate of 5 kHz and the pulse width of 4.3 ns.The output beam has a good top-hat beam profile in both the near field and the far field.张恒利 闫莹 Daijun Li Peng Shi Keming Du 2009Chinese Optics Letters2009,7,3:0
11Strong in-plane optical anisotropy in 2D van der Waals antiferromagnet VOCl显示文摘Two-dimensional(2D)van der Waals(vdW)magnetic materials with strong in-plane anisotropy can make possible novel applications such as optospintronics and strain sensors.In this work,the strong in-plane optical anisotropy in 2D vdW antiferromagnet VOCl has been systematically investigated.The optical brightness and absorption coefficient exhibit evident periodic variation with the change of incident polarization,unveiling the strong in-plane anisotropic optical absorption.The Raman intensity in this material shows obvious dependence on the polarization angle of incident laser,demonstrating that the phonon properties possess strong in-plane anisotropy.Besides,we have also realized in-situ visualization of in-plane optical reflection anisotropy in this material.Moreover,the strong second harmonic generation(SHG)signal can only be detected when the incident polarization is along specific in-plane crystal orientations,illustrating the presence of strong in-plane nonlinear optical anisotropy.These findings will benefit the applications of VOCl in the field of polarization-dependent electronics and spintronics.Tianle Zhang Jiantao Du Wenjun Wang Keming Wu Shuai Yue Xinfeng Liu Wanfu Shen Chunguang Hu Minghui Wu Zhe Qu Shengxue Yang Chengbao Jiang 2023Nano Research2023,16,5:0
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