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| 1 | Interactions of OsMADS1 with Floral Homeotic Genes in Rice Flower Development显示文摘在繁殖开发期间,米饭植物开发决定最后的谷物收益的唯一的花器官。OsMADS1,象 SEPALLATA 一样疯盒子的基因之一,被解开了玩关键角色 inrice 花的机关身份说明和花的分裂组织确定性。然而,在调整花开发与另外的花的 homeotic 基因位于 OsMADS1 的相互作用下面的分子的机制 remainslargely 逃犯。在这个工作,我们在他们的蛋白质之中与物理相互作用一起与 B- , C- ,和 D 班基因学习了 OsMADS1 的基因相互作用。我们证明在 OsMADS1 和 OsMADS3 之间的物理、基因的相互作用为花的分裂组织活动维护和机关身份说明是必要的;当 OsMADS1 身体上并且遗传上在调整花的分裂组织确定性和 suppressingspikelet 分裂组织回复与 OsMADS58 交往时。我们提供了重要基因证据在花开发期间支持二米饭 C 班基因(OsMADS3 和 OsMADS58 ) 的 neofunctionalization。基因表示介绍和量的 RT-PCR 分析进一步表明 OsMADS1 影响涉及发信号的花的身份和荷尔蒙的许多基因的表达式,并且染色质 immunoprecipitation (芯片)-PCR 试金进一步证明 OsMADS17 是 OsMADS1 的直接目标基因。一起拿,这些结果表明 OsMADS1 在指定米饭有多样化的规章的功能花的机关和分裂组织身份,可能通过它和不同花的 homeotic 管理者的基因、物理的相互作用。 | Yun Hu Wanqi Liang Changsong Yin Xuelian Yang Baozhe Ping Anxue Li Ru Jia Mingjiao Chen Zhijing Luo Qiang Cai Xiangxiang Zhao Dabing Zhang Zheng Yuan | 2015 | Molecular Plant2015，8，9： | 10 |
| 2 | Seismic comprehensive forecast based on modified project pursuit regression显示文摘In the research of projection pursuit for seismic comprehensive forecast,the algorithm of projection pursuit regression(PPR) is one of most applicable methods.But generally,the algorithm structure of the PPR is very complicated.By partial smooth regressions for many times,it has a large amount of calculation and complicated extrapolation,so it is easily trapped in partial solution.On the basis of the algorithm features of the PPR method,some solutions are given as below to aim at some shortcomings in the PPR calculation:to optimize project direction by using particle swarm optimization instead of Gauss-Newton algorithm,to simplify the optimal process with fitting ridge function by using Hermitian polynomial instead of piecewise linear regression.The overall optimal ridge function can be obtained without grouping the parameter optimization.The modeling capability and calculating accuracy of projection pursuit method are tested by means of numerical emulation technique on the basis of particle swarm optimization and Hermitian polynomial,and then applied to the seismic comprehensive forecasting models of polydimensional seismic time series and general disorder seismic samples.The calculation and analysis show that the projection pursuit model in this paper is characterized by simplicity,celerity and effectiveness.And this model is approved to have satisfactory effects in the real seismic comprehensive forecasting,which can be regarded as a comprehensive analysis method in seismic comprehensive forecast. | Anxu Wu Xiangdong Lin Changsheng Jiang Yongxian Zhang Xiaodong Zhang Mingxiao Li Ping'an Li | 2009 | Earthquake Science2009，22，5： | 3 |
| 3 | On the uniqueness of virtual substrate for metasurface in a dielectric half-space显示文摘In this paper,we study the uniqueness of a virtual substrate for periodic metallic elements in a dielectric half-space.When the periodic metallic elements are placed at the interface of different substrates,they can be regarded to be embedded into a virtual substrate whose thickness approaches zero.However,the process of the mathematical limit of the thickness seems to be independent of the choice of the virtual substrate.Thereby,it is necessary to verify whether the arbitrary virtual substrate holds for the case.It is theoretically verified that the permittivity of the virtual substrate should be unique in order to satisfy the physical boundary condition of the periodic metallic elements.The root of the phenomenon is that the mathematical limit gives the alternative means to approach the actual physical situation,but the actual physical situation determines the way how the mathematical limit approaches zero.Finally,for comparison,two different virtual substrates are designed to validate the theory,for alternative substrate,incidence angle,and metallic elements.Besides,the finding can also be used to simplify the analysis and design of the metasurface by converting the periodic metallic elements in a dielectric half-space to the same periodic metallic elements in a uniform substrate. | Xiaobo LIU Wei XUE Xiaoming CHEN Anxue ZHANG Qiang CHENG Zongben XU | 2022 | Science China(Information Sciences)2022，65，1： | 2 |
| 4 | Revisit to Mutual Coupling Effects on Multi-Antenna Systems显示文摘Due to space limitation,mutual coupling occurs almost invisibly in array antennas.In this paper,the mutual coupling effects on the two most popular categories of array antennas,i.e.,phased arrays and multiple-input multiple-output(MIMO)antennas,are reviewed.Some misconceptions regarding the mutual coupling effects are uncovered.It is shown that the steering pattern of a phased array at an arbitrary scan-ning angle can be readily calculated once the embedded radiation patterns of the array elements(including the mutual coupling effect)are obtained.As antenna spacing decreases,absorption loss increases,yet the phase terms tend to add up constructively as antenna spacing reduces,which may overcompensate the absorption loss due to mutual coupling.Thus,the array efficiency may be increased by reducing the antenna spacing.A patch antenna array is used to illustrate this phenomenon.It is further shown that while mutual coupling tends to reduce the correlation of two-element arrays,it has a negligible effect on the overall correlations of larger arrays.Finally,various mutual coupling reduction techniques are briefly presented.Two feasible techniques for large planar arrays are used to illustrate the benefits of array decoupling. | Xiaoming Chen Huiling Pei Mengting Li Huilin Huang Quanxin Ren Qi Wu Anxue Zhang Ahmed A.Kishk | 2020 | Journal of Communications and Information Networks2020，5，4： | 0 |
| 5 | A Revisit of Orbital Angular Momentum Multiplexing in Multipath Environment显示文摘It is commonly believed that orbital an-gular momentum(OAM)multiplexing is only suitable for short-range communications in line-of-sight(LoS)scenario and multipath propagation would be detrimental for OAM communications.It has been demonstrated very recently that OAM multiplexing could work in rich isotropic multipath environment when the conventional spatial equalization is used for data detection.Moreover,the resulting channel capacity is comparable to that of a conventional multiple-input multiple-output system.Nev-ertheless,the rich isotropic multipath environment is an ideal multipath scenario.In this paper,we investigate the performance of OAM multiplexing in arbitrary multipath environment.Contrary to the common belief,it is shown that multipath can be beneficial for OAM multiplexing in terms of channel capacity.Particularly,the OAM capacity increases with enlarged angular spread of the channel and reaches its maximum when the angular spread is comparable to the divergence angle of the OAM beam.Based on the study,the OAM multiplexing is further investigated for base station(BS)applications.It is shown that OAM based BS antennas are comparable to(or even outperform)the conventional BS antennas in terms of channel capacity. | Wei Xue Xiaoming Chen Xiaobo Liu Xiangshuai Meng Anxue Zhang Wei E.I.Sha | 2020 | Journal of Communications and Information Networks2020，5，4： | 0 |
| 6 | Cross-polarization suppression in C-shaped microstrip patch antenna employing anisotropic dielectrics显示文摘An anisotropic dielectric realized by layered ceramic structures was adopted to design a low cross-polarization C-shaped patch antenna.The anisotropic dielectric performs as a substrate and can cause additional cross-polarized fields which are able to cancel the cross-polarized fields generated by the C-shaped patch itself,and then reduce the cross-polarization level.Compared to the C-shaped patch antenna with an isotropic substrate,the cross-polarization of the proposed antenna is suppressed by more than 15 dB with a little gain enhancement at 2.4 GHz.The anisotropic dielectric has a little impact on the direction of the C-shaped patch antenna.The gain of the proposed C-shaped patch antenna is 6.8 dB with a cross-polarization of28 dB. | Hongyu Shi Shitao Zhu Jianxing Li Anxue Zhang Zhuo Xu | 2017 | Journal of Advanced Dielectrics2017，7，4： | 0 |
| 7 | Transformation of a metasurface on the substrate interface into the same metasurface in a homogenized substrate based on two kinds of modified Babinet's principles显示文摘Previously,the metasurface was usually manufactured on a dielectric substrate using the printed circuit boards(PCB)technology.However,due to the existence of the substrate interface,the electromagnetic radiation and coupling of the sub-wavelength metasurface becomes more complex for theoretical analysis.To this end,an indirect method is developed to transform the problem of a metasurface in a dielectric half-space into a simpler problem of the same metasurface in a homogenized dielectric space.Specifically,two different theoretical models of complementary metasurfaces in a dielectric half-space are first given.A specific yet unknown relative permittivity is included in one model to realize the above transformation.By comparing these two theoretical models in terms of the surface impedance matrix,the specific yet unknown relative permittivity is analytically derived as(ε_(r,unk))^(1/2)=(ε_(r,1))^(1/2)/2+(ε_(r,2))^(1/2)/2.Finally,two arbitrary metasurfaces are given to verify the proposed theory for arbitrary incidence wave in dielectric half-space.The theory can greatly simplify the analysis and design of the metasurface in a dielectric halfspace,because only the metasurface in a homogenized dielectric space like vacuum needs to be theoretically solved after completing the above transformation. | Xiaobo LIU Rui LU Anxue ZHANG Qiang CHENG Xiaoming CHEN | 2023 | Science China(Information Sciences)2023，66，12： | 0 |
| 8 | Polarization singularities in planar electromagnetic resonators with rotation and mirror symmetries显示文摘In this work,we apply the group representation theory to systematically study polarization singularities in the inplane components of the electric fields supported by a planar electromagnetic(EM)resonator with generic rotation and reflection symmetries.We reveal the intrinsic connections between the symmetries and the topological features,i.e.,the spatial configuration of the in-plane fields and the associated polarization singularities.The connections are substantiated by a simple relation that links the topological charges of the singularities and the symmetries of the resonator.To verify,a microwave planar resonator with the D8group symmetries is designed and numerically simulated,which demonstrates the theoretical findings well.Our discussions can be applied to generic EM resonators working in a wide EM spectrum,such as circular antenna arrays,microring resonators,and photonic quasi-crystals,and provide a unique symmetry perspective on many effects in singular optics and topological photonics. | JIE YANG XUEZHI ZHENG JIAFU WANG ANXUE ZHANG TIE JUN CUI GUY A.E.VANDENBOSCH | 2023 | Photonics Research2023，11，6： | 0 |
| 9 | Wideband polarization-independent anomalous reflection metasurface with multiple resonance modes显示文摘An ultra-thin metasurface is proposed to realize wideband polarization-independent anomalous reflection. The sub-wavelengthresonator can produce different resonance modes, which are the result of the combined effect of dielectric and the metallic structure.The gradient metasurface is done by six discrete orientation of the local sub-wavelength resonator which provides a phase gradient.The simulation and measured results show that 9 GHz bandwidth of the anomalous reflection is achieved. | Guoxiang Dong Song Xia Yongyong Zhuang Hongyu Shi Zhan Zhang Yuchen He Anxue Zhang Xiaoyong Wei Zhuo Xu | 2017 | Journal of Advanced Dielectrics2017，7，2： | 0 |
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