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基于RMDLPP的雷达空中目标分类

系统工程与电子技术 2024年第4期46卷 1220-1228页

作者：刘帅康曹伟管志强杨学岭许金鑫中国船舶集团有限公司第七二四研究所江苏南京211153 南京航空航天大学电子信息工程学院江苏南京211106

针对鉴别局部保持投影(discriminant locality preserving projections, DLPP)在窄带雷达目标数据降维时出现的类内离散度矩阵奇异和对孤立点敏感进而导致类别之间可分性弱的问题,提出了基于鲁棒性边界DLPP(robust margin DLPP, RMDLPP... 详细信息

针对鉴别局部保持投影(discriminant locality preserving projections, DLPP)在窄带雷达目标数据降维时出现的类内离散度矩阵奇异和对孤立点敏感进而导致类别之间可分性弱的问题,提出了基于鲁棒性边界DLPP(robust margin DLPP, RMDLPP)的窄带雷达空中目标分类方法。首先,在计算样本之间距离时将两样本点的欧氏距离与同类样本均值相关联。然后,挑选一定数量的边界样本点进行处理并对优化DLPP目标函数进行降维。最后,使用高性能分类器对降维后的数据进行区分,实现对空中目标的分类。通过对X波段对空警戒雷达实测数据的对比实验表明,所提方法具有更好的分类准确率和对孤立点的鲁棒性。

关键词：窄带雷达空中目标分类鉴别局部保持投影最大边界准则降维

Tolerance analysis of multiple-element linear retrodirective cross-eye jamming

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Journal of Systems Engineering and Electronics 2020年第3期31卷 460-469页

作者： LIU Tianpeng WEI Xizhang PENG Bo LIU Zhen SUN Bin guan zhiqiang College of Electronic Science and Technology National University of Defense TechnologyChangsha 410073China School of Electronic and Communication Engineering Sun Yat-sen UniversityShenzhen 518107China Beijing Institute of Tracking and Telecommunication Technology Beijing 100094China Beijing Huahang Radio Measurement Institute Beijing 100013China

Tolerance sensitivity limits the practical application of the cross-eye *** literature has demonstrated that retrodirective cross-eye jamming with multiple antenna elements possesses the advantage of loose tolerance requirements compared to traditional cross-eye ***,the previous analysis was limited,because there are still some factors affecting the parameter tolerance of the multiple-element retrodirective cross-eye jamming(MRCJ)system and they have not been investigated completely,such as the loop difference,the baseline ratio and the jammer-to-signal *** paper performs a comprehensive tolerance analysis of the MRCJ system with a nonuniformspacing linear *** results demonstrate the tolerance effects of the above influence factors and give reasonable advice for easing tolerance sensitivity.

关键词： electronic warfare(EW) electronic countermeasure(ECM) cross-eye jamming radar active jamming tolerance

Real-time Raman detection by the cavity mode enhanced Raman scattering

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Nano Research 2019年第7期12卷 1643-1649页

作者： Yang Liu Xiaorui Tian Weiran Guo Wenqiang Wang zhiqiang guan Hongxing Xu School of Physics and Technology Wuhan UniversityWuhan 430072China Center for Nanoscience and Nanotechnology Wuhan UniversityWuhan 430072China Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education Wuhan UniversityWuhan 430072China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China The Institute for Advanced Studies Wuhan UniversityWuhan 430072China

Integrating surface enhanced Raman scattering (SERS) with microfluidics is the long-term goal for reduced volume,multiplex and automation fingerprint detection of *** sensitivity,repeatability,stability,reusability and real-time detection are the performance goals of Raman detection in the aqueous solution ***,we reported the study on cavity mode enhanced SERS detection of both surface-adsorbed molecules and non-surface-adsorbed molecules in the solution *** cavity modes had important influence on the SERS enhancement,especially for the non-surface adsorbed ***,repeatable,reusable and real-time Raman signal detection of the non-surface adsorbed Rhodamine 6G molecules was *** work is an important step for the practical on-chip microfluidic Raman detection applications.

关键词： surface enhanced Raman scattering cavity modes microfluidics bi-analyte real-time dete

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儿童C型淋巴瘤样丘疹病一例

中国麻风皮肤病杂志 2024年第6期40卷 427-429页

作者：杨远远刘霞索翠平管志强李永欣赵建斌徐州医科大学附属市立医院皮肤科江苏徐州221000 徐州医科大学附属市立医院病理科江苏徐州221000 徐州医科大学附属市立医院病案与数据统计中心江苏徐州221000

C型淋巴瘤样丘疹病较少见,本文报道一例。患者,男,13岁。全身反复红色丘疹结节2年,部分皮疹中央溃烂,系统检查未见异常,曾诊断为“急性痘疮样苔藓样糠疹”。入院后完善组织病理示:肿瘤真皮层和皮下组织可见形态一致的间变大淋巴细胞弥... 详细信息

C型淋巴瘤样丘疹病较少见,本文报道一例。患者,男,13岁。全身反复红色丘疹结节2年,部分皮疹中央溃烂,系统检查未见异常,曾诊断为“急性痘疮样苔藓样糠疹”。入院后完善组织病理示:肿瘤真皮层和皮下组织可见形态一致的间变大淋巴细胞弥漫浸润。免疫组化:CD2(+++),CD8(+),CD30(+++),GranzymeB(+),Ki67(+90%),TI-A(+),TCR基因重排阳性。诊断:C型淋巴瘤样丘疹病。

关键词：淋巴瘤样丘疹病儿童免疫组织化学

Switched-mode AGC circuits with internally created reset module for burst-mode unbalanced data optical receiver

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High Technology Letters 2011年第3期17卷 317-324页

作者： Wang Rong Wang Zhigong Wang Weibai Xu Jian guan zhiqiang Institution of RF-＆ OE-ICs of Southeast University Nanjing 210096 P.R. China Sino-Chip OEIC Jiangsu Co. Ltd Nanjing 210016 P.R. China

This paper presents an innovative switched-mode auto gain control （AGC） circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced （BMU） optical data transmission. Conventional AGC circuit is inappropriate for BMU data transmission because it is based on average level detection and requires considerable time to settle on a predefined gain. Therefore, we adopt a fast switched-mode AGC based on peak level detection. After the gain is adjusted, the peak level detectors need to re-detect the peak level of the input signal. Thus, we develop an internally created reset module. This AGC with reset module exhibits a fast operation and achieves an adjusted stable gain within one-bit, avoiding any bit loss up to 10Mb/s data rate. During power-up, the peak level detectors possibly hold an uncertain level resulting in the bit-errors. We propose a power-up reset circuit to solve this problem. Designed in a 0.5μm CMOS technology, the circuit achieves an optical sensitivity of better than -30dBm and a wide dynamic range of over 30dB with a power dissipation of only 30 mW from a 5V supply.

关键词： burst-mode unbalanced (BMU) data optical receiver auto gain control (AGC) internally created reset module bit loss

Ionic covalent organic frameworks with tailored anionic redox chemistry and selective ion transport for high-performance Na-ion cathodes

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Journal of Energy Chemistry 2022年第12期75卷 441-447,I0012页

作者： Zhongqiu Tong Hui Wang Tianxing Kang Yan Wu zhiqiang guan Fan Zhang Yongbing Tang Chun-Sing Lee Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Department of Chemistry City University of Hong KongHong Kong 999077China Center of Super-Diamond and Advanced Films(COSDAF) City University of Hong KongHong Kong 999077China Key Laboratory of Material Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052HenanChina Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055GuangdongChina

Employing cathode materials with multiple redox couples and electrolytes with efficient cation transport kinetics are two effective approaches to improving the electrochemical performance of *** this work,for the first time,we present a design strategy of simultaneously realizing reversible cationic and anionic redox chemistries as well as selective anion/cation transport in the viologen-based COFs(BAVCOF:X,coordinated anions of X=Cl^(-),Br^(-),I^(-),and ClO_(4)^(-))for high-performance Na-ion *** the cationic redox of viologen segments,the different redox activities of anions effectively tune the total capacities of the ***,electrochemical analysis and ab-initial molecular dynamics(AIMD)calculation illustrate that the anion/cation transport kinetics of electrolytes caged in the COFs'channels can be selectively tuned by the coordinated *** a result,combining high-potential Br-/Br_(2)redox couple,cationic redox of viologen segments,and enhanced Na+transport kinetics,the BAV-COF:Brdemonstrates stable performance with energy densities of 358.7 and 145.2 Wh kg^(-1)at power densities of 116.5 and 2124.1 W kg^(-1),*** study offers new insight into the fabrication of organic cathodes with anionic redox and the advantages of COFs electrode materials in anion/cation transport selectivity for energy storage applications.

关键词： Cationic and anionic redox chemistries Selective anion/cation transport Ionic COFs Organic cathode Na-ion battery

Giant photothermoelectric effect in silicon nanoribbon photodetectors

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Light(Science & Applications) 2020年第1期9卷 853-860页

作者： Wei Dai Weikang Liu Jian Yang Chao Xu Alessandro Alabastri Chang Liu Peter Nordlander zhiqiang guan Hongxing Xu School of Physics and Technology Center for Nanoscience and Nanotechnologyand Key Laboratory of Artificial Micro-and Nano-structures of Ministry of EducationWuhan UniversityWuhan 430072China Department of Physics and Astronomy Department of Electrical and Computer Engineering and Laboratory for NanophotonicsRice UniversityHoustonTX 77005USA The Institute for Advanced Studies Wuhan UniversityWuhan 430072China

The photothermoelectric(PTE)effect enables efficient harvesting of the energy of photogenerated hot carriers and is a promising choice for high-efficiency photoelectric energy conversion and ***,the PTE effect was reported in low-dimensional nanomaterials,suggesting the possibility of optimizing their energy conversion ***,the PTE effect becomes extremely inefficient in low-dimensional nanomaterials,owing to intrinsic disadvantages,such as low optical absorption and immature fabrication *** this study,a giant PTE effect was observed in lightly doped p-type silicon nanoribbons caused by photogenerated hot *** open-circuit photovoltage responsivity of the device was 3-4 orders of magnitude higher than those of previously reported PTE *** measured photovoltage responses fit very well with the proposed photothermoelectric multiphysics *** research proposes an application of the PTE effect and a possible method for utilizing hot carriers in semiconductors to significantly improve their photoelectric conversion efficiency.

关键词： effect utilizing enable

Surface-enhanced Raman scattering on dual-layer metallic gratingstructures

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Chinese Science Bulletin 2010年第24期55卷 2643-2648页

作者： guan zhiqiang HAKANSON Ulf ANTTU Nicklas WEI Hong XU HongQi MONTELIUS Lars XU HongXing Nanoscale Physics and Devices Laboratory Institute of Physics Chinese Academy of Sciences Beijing 100190 China Division of Solid State Physics/The Nanometer Structure Consortium Lund University Lund S-221 00 Sweden

Dual-layer Metallic grating(DMG)structures as surface-enhanced Raman scattering(SERS)substrates are studied using benzenethiol as the probe *** DMG structure consists of a SiO2 grating and 100-nm-thick gold coating *** enhancement factor of 105 is achieved by optimizing the SiO 2 grating height within the range from 165 to 550 *** enhancement factor dependence on the SiO2 grating height is due to the surface plasmon excitation,which is dependent on the polarization of the incident light,and confirmed by finite difference time domain *** study demonstrates the advantages of high uniformity,reproducibility and sensitivity in the DMG structures for SERS applications.

关键词：表面增强拉曼散射光栅结构双层金属表面增强拉曼光谱二氧化硅表面等离子体有限差分模拟增强因子

Grasp Detection with Hierarchical Multi-Scale Feature Fusion and Inverted Shuffle Residual

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Tsinghua Science and Technology 2024年第1期29卷 244-256页

作者： Wenjie Geng zhiqiang Cao Peiyu guan Fengshui Jing Min Tan Junzhi Yu State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Department of Advanced Manufacturing and Robotics College of EngineeringPeking UniversityBeijing 100871China

Grasp detection plays a critical role for robot *** pixel-wise grasp detection networks with encoder-decoder structure receive much attention due to good accuracy and ***,they usually transmit the high-level feature in the encoder to the decoder,and low-level features are *** is noted that low-level features contain abundant detail information,and how to fully exploit low-level features remains ***,the channel information in high-level feature is also not well ***,the performance of grasp detection is *** solve these problems,we propose a grasp detection network with hierarchical multi-scale feature fusion and inverted shuffle *** low-level and high-level features in the encoder are firstly fused by the designed skip connections with attention module,and the fused information is then propagated to corresponding layers of the decoder for in-depth feature *** a hierarchical fusion guarantees the quality of grasp ***,an inverted shuffle residual module is created,where the high-level feature from encoder is split in channel and the resultant split features are processed in their respective *** such differentiation processing,more high-dimensional channel information is kept,which enhances the representation ability of the ***,an information enhancement module is added before the encoder to reinforce input *** proposed method attains 98.9%and 97.8%in image-wise and object-wise accuracy on the Cornell grasping dataset,respectively,and the experimental results verify the effectiveness of the method.

关键词： grasp detection hierarchical multi-scale feature fusion skip connections with attention inverted shuffle residual