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| 1 | Boundary-processing-technique in EMD method and Hilbert transform显示文摘By virtue of neural network, a series of signals is extended forward and backward, as a result, two additional maxima and two additional minima are obtained at both ends of the original data set, with which the EMD decomposition can be exactly achieved with cubic spline interpolation. Meanwhile, by using of neural network every IMF component can also be extended forward and backward, which effectively restrains the end effect, thus the veracious Hilbert spectra are achieved. Verifications of the sample signals and the actual surface elevation of sea waves show that the present extension method is relatively accurate. | DENG Yongjun, WANG Wei, QIAN Chengchun, WANG Zhong & DAI DejunNetwork Center, Ocean University of Qingdao. Qingdao 266003, China Physical Oceanography Laboratory, Ocean Universily of Qingdao, Qingdao 266003, China | 2001 | Chinese Science Bulletin2001，46，11： | 91 |
| 2 | Multichannel vectorial holographic display and encryption显示文摘Since its invention,holography has emerged as a powerful tool to fully reconstruct the wavefronts of light including all the fundamental properties(amplitude,phase,polarization,wave vector,and frequency).For exploring the full capability for information storage/display and enhancing the encryption security of metasurface holograms,smart multiplexing techniques together with suitable metasurface designs are highly demanded.Here,we integrate multiple polarization manipulation channels for various spatial phase profiles into a single birefringent vectorial hologram by completely avoiding unwanted cross-talk.Multiple independent target phase profiles with quantified phase relations that can process significantly different information in different polarization states are realized within a single metasurface.For our metasurface holograms,we demonstrate high fidelity,large efficiency,broadband operation,and a total of twelve polarization channels.Such multichannel polarization multiplexing can be used for dynamic vectorial holographic display and can provide triple protection for optical security.The concept is appealing for applications of arbitrary spin to angular momentum conversion and various phase modulation/beam shaping elements. | Ruizhe Zhao Basudeb Sain Qunshuo Wei Chengchun Tang Xiaowei Li Thomas Weiss Lingling Huang Yongtian Wang Thomas Zentgraf | 2018 | Light(Science & Applications)2018，7，1： | 15 |
| 3 | A Bayesian method for comprehensive water quality evaluation of the Danjiangkou Reservoir water source area, for the middle route of the South-to-North Water Diversion Project in China显示文摘Danjiangkou 水库是为在中国的 South-to-North 水转向工程的中间的线路的水来源。因此,它的水质量地位担心大。五水质量指示物(溶解的氧,高锰酸盐索引,氨氮,全部的氮,和全部的磷),在三点被测量监视地点( Danjiangkou 水库水坝, Hejiawan 和 Jiangbei 桥),调查变化趋势,并且在到2012年5月的从2006年1月的 Danjiangkou 水库区域的水质量的空间与时间的特征。我们然后使用了一个贝叶斯的统计方法包括地评估水质量。正常分发采样方法被用来计算可能性的,并且熵重量方法被用来为对的兴趣的变量决定指示物重量到学习。结果显示所有五指示物的集中在最后六年期间增加了。另外,在水库的水质量在湿季节期间是更坏的(从 5 月到 10 月) ,比在旱季期间(从 11 月到下一年的 4 月) 。总的来说,水的概率根据为在中国的表面水的环境优秀标准,属于类型 II 的优秀范畴是 27.7%-33.7% ,比它属于另外的四种水质量类型的大。营养素的增加的集中能导致 Danjiangkou 水库的超营养作用。这个方法减少了通常与决定指示物重量和人工的分类被联系的主观,完成更可靠的结果。这些结果显示 interbasin 水转向工程在 Danjiangkou 水库区域实现综合的水质量管理是重要的[出版摘要] | Fangbing MA Chunhui LI Xuan WANG Zhifeng YANG Chengchun SUN Peiyu LIANG | 2014 | Frontiers of Earth Science2014，8，2： | 14 |
| 4 | High-Lift Effect of Bionic Slat Based on Owl Wing显示文摘 | Changjiang Ge Luquan Ren Ping Liang Chengchun Zhang Zhihui Zhang | 2013 | Journal of Bionic Engineering2013，10，4： | 11 |
| 5 | Controllable optical activity with non-chiral plasmonic metasurfaces显示文摘Optical activity is the rotation of the plane of linearly polarized light along the propagation direction as the light travels through optically active materials.In existing methods,the strength of the optical activity is determined by the chirality of the materials,which is difficult to control quantitatively.Here we numerically and experimentally investigated an alternative approach to realize and control the optical activity with non-chiral plasmonic metasurfaces.Through judicious design of the structural units of the metasurfaces,the right and left circular polarization components of the linearly polarized light have different phase retardations after transmitting through the metasurfaces,leading to large optical activity.Moreover,the strength of the optical activity can be easily and accurately tuned by directly adjusting the phase difference.The proposed approach based on non-chiral plasmonic metasurfaces exhibits large optical activity with a high controllable degree of freedom,which may provide more possibilities for applications in photonics. | Ping Yu Jianxiong Li Chengchun Tang Hua Cheng Zhaocheng Liu Zhancheng Li Zhe Liu Changzhi Gu Junjie Li Shuqi Chen Jianguo Tian | 2016 | Light(Science & Applications)2016，5，1： | 8 |
| 6 | Wave-induced stress and estimation of its driven effect on currents显示文摘A genuine geostrophic small amplitude wave solution is deduced for the first time from the general form of linear fluid dynamic equations with the f-plane approximation, where the horizontal component of angular velocity of the earth rotation is taken into account. The Coriolis- induced stress obtained from this solution consists of lateral and reverse component, while its first order approximation is reduced to the result of Hasselmann or Xu Zhigang. Accordingly, combining the Coriolis-induced wave stress with the virtual wave stress proposed by Longuet-Higgins, the ratio of total wave-induced stress to wind stress on the sea surface is es- timated, through which the importance of the wave-induced stress is emphasized in the study of the currents in the seas around China, especially in the Bohai Sea and the Yellow Sea. | SUN Fu GAO Shan WANG Wei QIAN Chengchun | 2004 | Science China Earth Sciences2004，47，12： | 6 |
| 7 | Prediction and control of trailing edge noise based on bionic airfoil显示文摘As a promising means,the passive porosity technology is used for the trailing-edge noise reduction of a bionic airfoil.The detailed two-dimensional Large Eddy Simulation is achieved to gain a better understanding of the prediction and passive control of trailing-edge noise source with the non-porous and porous treatment,respectively.The flow fields around the bionic airfoil indicate that the leading-edge separation causes both the noise contributors,i.e.,the turbulent boundary layer and the vortex shedding.In addition,the effect of the porous trailing edge is substantiated in the distribution of the static pressure.The relevant noise also suggests a pronounced noise reduction potential in excess of 10 dB,but it has dependence on the flow resistivities.The two trailing-edge noise reduction mechanisms are characterized:(1)the suppression of the tonal vortex shedding noise;(2)the reduction of broadband turbulent boundary layer scattering noise.The findings may be used as reference in the design of silent aircraft. | GE ChangJiang ZHANG ZhiHui LIANG Ping ZHANG ChengChun REN LuQuan | 2014 | Science China(Technological Sciences)2014，57，7： | 6 |
| 8 | Numerical Simulation of the Effect of Bionic Serrated Structures on the Aerodynamic Noise of a Circular Cylinder显示文摘 | Lei Shi Chengchun Zhang Jing Wang Luquan Ren | 2012 | Journal of Bionic Engineering2012，9，1： | 4 |
| 9 | Magnetostriction of Pseudobinary Compounds Pr_(0.15)Tb_xDy_(0.85-x)Fe_2(x=0 to 0.85)显示文摘The compound ingots of Pr0.15TbxDy0.85-xFe2 (x=0 to 0.85) were prepared by arc melting in a water Cu boat using arc furnace under a purified Ar atmosphere. Appropriate annealing (850℃, 100 h) can obtain single Laves phase compound. The magnetostriction for these systems will rise obviously when partially substituted Tb or Dy by Pr. | Yangxian LI and Jingping QU (Hebei University of Technology, Tianjin 300130, China) Chengchun TANG, Guangheng WU and Wenshan ZHAN (State Key Laboratory for Magnetism, Institute of Physics, CAS, BeiJing 100080, China) | 2000 | Journal of Materials Science & Technology2000，16，6： | 2 |
| 10 | Effect of Feather Elasticity of Kingfisher Wing on Droplet Impact Dynamics显示文摘 | Chengchun Zhang Zhengyang Wu Xiumei Zhang Yongli Yue Jing Wang | 2018 | Journal of Bionic Engineering2018，15，4： | 2 |
| 11 | Large-scale fabrication of boron nitride nanosheets and their utilization in polymer composites with improved thermal and mechanical properties显示文摘 | Zhi Chunyi Bando Y Tang Chengchun | 2009 | Adv Mater2009，21，28： | 1 |
| 12 | Simple and high-yield method for synthesizing single-crystal gan nanowires显示文摘 | Tang Chengchun Fan S S Dang H Y | 2000 | Appl Phys Lett2000，77，13： | 1 |
| 13 | Accel- erating regular LDPC code decoders on GPUs 显示文摘 | Chang Chengchun Chang Yanglang Huang Minyu | 2011 | IEEE Jour- nal of Selected Topics in Applied Earth Observations and Re- mote Sensing September2011，4，3： | 1 |
| 14 | Age-related nutrient content and carbon isotope composition in the leaves and branches of Quercus aquifolioides along an altitudinal gradient显示文摘 | Chunyang Li Chengchun Wu Baoli Duan Helena Korpelainen Olavi Luukkanen | 2009 | Trees2009，，5： | 1 |
| 15 | Matrine induces caspase-dependent apoptosis in human osteosarcoma cells in vitro and in vivo through the upregulation of Bax and Fas/FasL and downregulation of Bcl-2显示文摘 | Cheng Zhen Liang Jia Kai Zhang Zhongli Shi Bing Liu Chengchun Q. Shen Hui Min Tao | 2012 | Cancer Chemotherapy and Pharmacology2012，，2： | 1 |
| 16 | Treatment the boundary problem in the empirical mode decomposition and the Hilbert transfom显示文摘 | Deng Yongjun Wang Wei Qian Chengchun | | 0，，03： | 1 |
| 17 | Large-scale Synthesis and Structure of Boron Nitride Sub-micron Spherical Particles显示文摘 | Tang Chengchun Yoshio Bando Dmitri Golberg | 2002 | Chem Commun2002，，16： | 1 |
| 18 | A ZigBee-based monitoring and protection system for building electrical safety显示文摘 | Huang Lichien Chang Hongchan Chen Chengchun | 2011 | Energy and Buildings2011，43，6： | 1 |
| 19 | 显示文摘 | Tang Chengchun Bando Y | 2003 | Applied Physics Letters2003，83，： | 1 |
| 20 | Spatial and temporal variations in nitrogen and phosphorous nutrients in the Yangtze River Estuary显示文摘 | CHEN Yaxin LIU Ruimin SUN Chengchun | 2012 | Marine Pollution Bulletin2012，64，10： | 1 |
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