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| 1 | Hollow Gradient-Structured Iron-Anchored Carbon Nanospheres for Enhanced Electromagnetic Wave Absorption显示文摘In the present paper,a microwave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption performance.The inorganic-organic competitive coating strategy was employed,which can effectively adjust the thermodynamic and kinetic reactions of iron ions during the solvothermal process.As a result,Fe nanoparticles can be gradually decreased from the inner side to the surface across the hollow carbon shell.The results reveal that it offers an outstanding reflection loss value in combination with broadband wave absorption and flexible adjustment ability,which is superior to other relative graded distribution structures and satisfied with the requirements of lightweight equipment.In addition,this work elucidates the intrinsic microwave regulation mechanism of the multiscale hybrid electromagnetic wave absorber.The excellent impedance matching and moderate dielectric parameters are exhibited to be the dominative factors for the promotion of microwave absorption performance of the optimized materials.This strategy to prepare gradient-distributed microwave absorbing materials initiates a new way for designing and fabricating wave absorber with excellent impedance matching property in practical applications. | Cao Wu Jing Wang Xiaohang Zhang Lixing Kang Xun Cao Yongyi Zhang Yutao Niu Yingying Yu Huili Fu Zongjie Shen Kunjie Wu Zhenzhong Yong Jingyun Zou Bin Wang Zhou Chen Zhengpeng Yang Qingwen Li | 2023 | Nano-Micro Letters2023，15，1： | 2 |
| 2 | Hydrogen Bonding-Assisted Synthesis of Silica/Oxidized Mesocarbon Microbeads Encapsulated in Amorphous Carbon as Stable Anode for Optimized/Enhanced Lithium Storage显示文摘The practical application of silica-based composites as an alternative to commercial graphite anode materials is hampered by their large volumetric expansion,poor conductivity,and low Coulombic efficiency.In this work,a novel silica/oxidized mesocarbon microbead/amorphous carbon(SiO2/O’MCMB/C)hierarchical structure in which SiO2 is sandwiched between spherical graphite and amorphous carbon shell was succes sfully fabricated through hydrogen bonding-assisted self-assembly and post-carbon coating method.The obtained three-layer hierarchical structure effectively accommodates the volumetric expansion of SiO2 and significantly enhances the electronic conductivity of composite materials.Moreover,the outer layer of amorphous carbon effectively increases the diffusion rate of lithium ions and promotes the formation of stable SEI film.As a result,the SiO2/O’MCMB/C composite exhibits superior electrochemical performance with a reversible capacity of 459.5 mA h/g in the first cycle,and the corresponding Coulombic efficiency is 62.8%.After 300 cycles,the capacity climbs to around 600 mA h/g.This synthetic route provides an efficient method for preparing SiO2 supported on graphite with excellent electrochemical performance,which is likely to promote its commercial applications. | Zongjie Cao Huitian Liu Wenlong Huang Peng Chen Yuansheng Liu Yu Yu Zhongqiang Shan Shuxian Meng | 2020 | Transactions of Tianjin University2020，26，1： | 2 |
| 3 | MULTI-REGION SEGMENTATION OF SAR IMAGE BY A MULTIPHASE LEVEL SET APPROACH显示文摘In this letter,a multiphase level set approach unifying region and boundary-based infor-mation for multi-region segmentation of Synthetic Aperture Radar(SAR)image is presented.Anenergy functional that is applicable for SAR image segmentation is defined.It consists of two termsdescribing the local statistic characteristics and the gradient characteristics of SAR image respectively.A multiphase level set model that explicitly describes the different regions in one image is proposed.The purpose of such a multiphase model is not only to simplify the way of denoting multi-region by levelset but also to guarantee the accuracy of segmentation.According to the presented multiphase model,the curve evolution equations with respect to edge curves are deduced.The multi-region segmentationis implemented by the numeric solution of the partial differential equations.The performance of theapproach is verified by both simulation and real SAR images.The experiments show that the proposedalgorithm reduces the speckle effect on segmentation and increases the boundary alignment accuracy,thus correctly divides the multi-region SAR image into different homogenous regions. | Fu Yusheng Cao Zongjie Pi Yiming | 2008 | Journal of Electronics(China)2008，25，4： | 2 |
| 4 | Multiphase SAR image segmentation with G-statistical-model-based active con- tours显示文摘 | Feng Jilan Cao Zongjie Pi Yiming | 2013 | IEEE Transactions on Geoscience and Remote Sensing2013，51，7： | 1 |
| 5 | Optimized projection matrix for compressive sensing显示文摘 | Xu Jianping Pi Yiming Cao Zongjie | 2010 | EURASIP Journal on Advances in Signal Processing2010，，43： | 1 |
| 6 | Security in application layer of radar sensor networks:detect friends or foe显示文摘 | Zongjie Cao Lijia Chert | 2012 | Security and Com- munication Networks2012，6，5： | 1 |
| 7 | Level Set Method for SAR Image Coregistration显示文摘 | WANG Jinfeng PI Yiming CAO Zongjie | 2008 | IEEE Geoscienee and Remote Sensing Letters2008，5，4： | 1 |
| 8 | Optimized projection matrix for compressive sensing 显示文摘 | Jianping Xu Yiming Pi Zongjie Cao | 2010 | EURASIP Journal on Advances in Signal Processing2010，43，2： | 1 |
| 9 | Optimized Projection Matrix for Compressive Sensing显示文摘 | Jianping Xu Yiming Pi Zongjie Cao | | 0，，15： | 1 |
| 10 | Muhiphase SAR image seg- mentation with G-stalistieal-model based active con- tours显示文摘 | Jilan Feng Zongjie Cao | 2013 | IEEE Transactions On Geoscience and Re- mole Sensing2013，51，7： | 1 |
| 11 | Finite Eement Facture Aalysis of the Main Arm of Tower Cranes with the 3-D Cracks显示文摘In this paper the local solutions of displacement fields in front of three-dimensional cracks are introduced and a new singular element of three-dimensional crack problems is constructed, and a new method for calculating stress intensity factors of three-dimensional crack problems is presented. With the present method, the structural strength of with longitudinal closed cracks under axial tensions is analyzed. It is possible for the crack to propagate because there are ring tensile stresses near joints of the main arm in tower cranes under axial press stresses. The stress and the stress intensity factor are calculated at joints on the main arm of tower cranes. Influences of welding residual stress on stress intensity factors and stresses are discussed. | Zongjie Cao Zhenbang Kuang Changping Li | 2004 | 上海交通大学学报2004，38，z2： | 0 |
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