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Science China(Information Sciences) 2023年第5期66卷 301-302页

作者： Cong SHI Junxian HE Shrinivas PUNDLIK xichuan zhou Nanjian WU Gang LUO School of Microelectronics and Communication Engineering Chongqing University Schepens Eye Research Institute Massachusetts Eye and Ear Harvard Medical School State Key Laboratory for Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences

This study proposes a low-cost, real-time, very large-scale integration (VLSI) architecture for optical flow *** architecture adopts parallel spatiotemporal filters to extract bio-inspired motion features at each pixel location and uses hardware random forests to infer the motion *** system achieves higher estimation accuracy at low computational hardware costs under real-time constraint than previous biological motion estimation systems.

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基于伪逆极坐标傅里叶变换的快速ISAR方位定标

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电子与信息学报 2019年第2期41卷 262-269页

作者：李东张成祥赵迪谭晓衡周喜川占木杨重庆大学通信与测控中心重庆400044 上海卫星工程研究所上海200240 重庆大学通信工程学院重庆400044

在逆合成孔径雷达(ISAR)成像中,由距离多普勒或时频分析方法得到的ISAR图像方位向仅是目标的多普勒频率分布,不能反映目标的真实形状,需对ISAR图像进行方位定标。该文提出一种快速的ISAR方位定标方法来估计目标的旋转角速度(RAV)。首先... 详细信息

在逆合成孔径雷达(ISAR)成像中,由距离多普勒或时频分析方法得到的ISAR图像方位向仅是目标的多普勒频率分布,不能反映目标的真实形状,需对ISAR图像进行方位定标。该文提出一种快速的ISAR方位定标方法来估计目标的旋转角速度(RAV)。首先,该方法利用高效的伪逆极坐标快速傅里叶变换把两幅不同时刻ISAR图像的旋转运动转化为沿极角的平移运动。然后,在极坐标域定义了一种新的积分相关代价函数来粗估目标的RAV。最后,通过采用二分法估计得到最优的RAV,进而实现ISAR方位定标。相比于现有方位定标算法,所提方法避免了插值操作带来的精度损失和高计算复杂度问题。计算机仿真和实测数据实验结果证明了所提方法的有效性。

关键词：逆合成孔径雷达旋转角速度伪逆极坐标快速傅里叶变换二分法

DDQ as an effective p-type dopant for the hole-transport material X1 and its application in stable solid-state dye-sensitized solar cells

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Journal of Energy Chemistry 2018年第2期27卷 413-418页

作者： Yanyun Zhang xichuan Yang Weihan Wang Xiuna Wang Licheng Sun State Key Laboratory of Fine Chemicals Dalian University of Technology (DUT) Department of Chemistry School of Chemical Science and EngineeringKTH Royal Institute of Technology

X1（Me O-TPD） is an inexpensive and easily synthesized π-conjugated molecule that has been used as a hole-transport material（HTM） in solid-state dye-sensitized solar cells（ssDSSCs）, achieving relatively high efficiency. In this paper, we characterize the physicochemical properties of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone（DDQ） and show that it is a promising p-dopant in a spin-coating solution with X1 as the HTM. The doped ssDSSCs showed an increase in short-circuit current density from 5.38 mA cm-2 to7.39 mA cm-2, and their overall power conversion efficiency increased from 2.9% to 4.3%. Also, ssDSSCs with DDQ-doped X1 were more stable than the undoped samples, demonstrating that DDQ can act as a p-type dopant in X1 as an HTM for highly efficient, stable ssDSSCs.

关键词： p-Type dopant XI DDQ ssDSSCs

Androgen receptor inhibits the hair follicle induction potential of dermal papilla cells by binding with Tcf4 at the A574 binding site

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Genes & Diseases 2023年第1期10卷 51-54页

作者： Nanlan Yu Tianxing Hu Haichao Yangg Lian Zhang Lin Zhu Xiaofang zhou Fei Xiang xichuan Yang Yuhong Li Department of Dermatology Southwest HospitalArmy Medical UniversityChongqing 400038China Department of Cell Biology Army Medical UniversityChongqing 400038China Institute of Burn Research State Key Laboratory of TraumaBurns and Combined InjurySouthwest HospitalArmy Medical UniversityChongqing 400038China

Androgenic alopecia(AGA)is the most common type of clinical *** receptor(AR)is the most logical candidate gene for regulating the occurrence of *** papilla cells(DPCs)are a special kind of mesenchymal cells,located in the hair bulb of hair *** play a role in maintaining and inducing the periodic cycling of hair follicles,and are considered as a key cell target of androgen in hair follicles.

关键词： clinical hair cycling

Rainfall Monitoring Using a Microwave Links Network:A Long-Term Experiment in East China

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Advances in Atmospheric Sciences 2023年第9期40卷 1567-1583页

作者： xichuan LIU Kun ZHAO Mingzhong ZOU Kang PU Kun SONG School of Atmospheric Science Nanjing UniversityNanjing 210023China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410003China River Management Division Jiangyin 214400China Beijing Institute of Applied Meteorology Beijing 100029China

The first long-term rainfall monitoring experiment using the commercial microwave links(CMLs)network in East China is *** network,located in Jiangyin,Jiangsu Province,consists of 49 links with frequencies ranging from 15 GHz to 26 GHz and lengths from 1.14 km to 4.78 *** OTT PARSIVEL disdrometer is deployed to refine the local rain-induced attenuation relationship,and the CML observations are compared simultaneously with five rain *** inversion parameters of the CML are optimized by minimizing the error of the accumulated rainfall of historical rainfall *** inversion results show that the daily accumulated rainfall retrieved by the CMLs agrees well with the rain gauge *** an opportunistic approach to monitor near-surface rainfall with high spatiotemporal representativeness and accuracy,the CML network can be used to monitor and forecast urban flood disasters,especially in regions where the widepread deployment of conventional meteorological instruments is impractical.

关键词： rainfall monitoring microwave links rain rate inversion path-average rainfall accumulation rainfall field

High isotropic dispiro structure hole transporting materials for planar perovskite solar cells

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Journal of Energy Chemistry 2019年第5期28卷 152-158页

作者： Bin Cai xichuan Yang Haoxin Wang Weihan Wang Jincheng An Licheng Sun State Key Laboratory of Fine Chemicals Institute of Artificial PhotosynthesisDUT-KTH Joint Education and Research Center on Molecular DevicesDalian University of Technology (DUT)Dalian 116024LiaoningChina Department of Chemistry School of Chemical Science and EngineeringKTH Royal Institute of Technology10044 StockholmSweden

Two novel fluorene-based hole transporting materials (HTMs) were synthesized to be used in perovskite solar cells (PSCs). C102 was designed based on C101 by simply linking the two carb on-carbon single bonds to compose a "dispiro" structure. Their typically similar structures cause them sharing almost the same energy levels. However, their photovoltaic performances are quite different due to the small variations. The PSC that contained the "dispiro" structure, C102, reached a power conversion efficiency (PCE) of 17.4%, while the device contained C101, obtained a lower PCE of 15.5%. Electrochemical properties and Photovoltaic characterization of the two materials have been investigated to explain the result. It is shown that C102 has a stronger ability to transport holes and resist the charge recombination. Thus, the dispiro structure should be more appropriate being used as HTM in PSCs.

关键词： Dispiro Hole transporting materials Planar perovskite solar cells

Measurement of solidprecipitation and blowing snow: current status and challenges

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Advances in Polar Science 2024年第3期35卷 289-302页

作者： PAN Rui LIU xichuan SHI Jiayi College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Key Laboratory of High Impact Weather(special) China Meteorological AdministrationChangsha 410073China

In this article,the relevant instruments and techniques for measuring solid precipitation and blowing snow are reviewed,with a focus on the in situ instrument ***,a literature review and specific observation activities for solid precipitation are provided,the working principles of several instruments are introduced,and the advantages and disadvantages,measurement performance,and specific application scenarios of the instruments are ***,there are numerous solid precipitation measurement instruments available,and the standardization and sustainability of these measurements also need to be *** purpose of the review is not to be exhaustive but to provide readers with information on the current status of the development of relevant technologies and the prospects for their application in the polar regions.

关键词： solid precipitation blowing snow measurement instruments

A tunable adaptive detector for distributed targets when signal mismatch occurs

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Journal of Systems Engineering and Electronics 2023年第4期34卷 873-878页

作者： CUI Yufeng WANG Yongliang LIU Weijian DU Qinglei ZHANG xichuan LI Xuhui Air Force Early Warning Academy Wuhan 430019China Unit 93128 of the PLA Beijing 100843China Unit 93155 of the PLA Chengdu 610041China

Aiming at the problem of detecting a distributed target when signal mismatch occurs,this paper proposes a tunable detector parameterized by an adjustable *** adjusting the parameter,the tunable detector can achieve robust or selective detection of mismatched ***,the proposed tunable detector,with a proper tunable parameter,can provide higher detection probability compared with existing detectors in the case of no signal *** addition,the proposed tunable detector possesses the constant false alarm rate property with the unknown noise covariance matrix.

关键词： multichannel signal detection target detection distributed target signal mismatch

Transplantation of olfactory ensheathing cells promotes axonal regeneration in a rat model of spinal cord injury

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Neural Regeneration Research 2010年第9期5卷 651-656页

作者： xichuan Teng Nozomu Yoshioka Junko Kimura-Kuroda Koki Kawamura HitoshiKawano Hongpeng Li Department of Developmental Morphology Tokyo Metropofitan Institute for Neuroscience Fuchu 183-8526 Japan Department of Pathology Medical College Eastern Liaoning University Dandong 118000 Liaoning Province China Department of Human Anatomy College of Basic Medical Sciences China Medical University Shenyang 110001 Liaoning Province China

BACKGROUND：Transplantation of olfactory ensheathing cells （OECs） into the injured spinal cord has been shown to promote axonal regeneration and functional ***,the mechanisms underlying the effects of OEC transplantation remain ***：To observe fibrotic scar formation and axonal regeneration in the damaged spinal cord following OEC transplantation,and to determine whether OEC transplantation promotes neural regeneration by attenuating fibrotic scar ***,TIME AND SETTING：A randomized,controlled animal experiment was performed at the Department of Developmental Morphology,Tokyo Metropolitan Institute for Neuroscience,Fuchu,Japan and at the Department of Human Anatomy,College of Basic Medical Sciences,China Medical University,China between April 2007 and May ***：OECs were obtained from olfactory nerves and olfactory bulbs of male,4-week-old,Sprague Dawley *** anti-serotonin polyclonal antibody,rabbit anti-calcitonin gene-related peptide polyclonal antibody,rabbit anti-glial fibrillary acidic protein polyclonal antibody,rabbit anti-type IV collagen polyclonal antibody,and mouse anti-rat endothelial cell antigen-1 monoclonal antibody were ***：Male,Sprague Dawley rats aged 8 weeks were randomly divided into three groups：sham-surgery （n = 3）,surgery （n = 9）,and OEC transplantation （n = 11）.Spinal cord transection at the T9-10 level was performed and the rats were transplanted with a 2-μL （1 × 105 cells） cell *** OUTCOME MEASURES：Formation of glial and fibrotic scars was examined using immunohistochemistry for glial fibrillary acidic protein and type IV ***-positive and calcitonin gene-related peptide-positive axons were visualized by immunohistochemistry,*** immunofluorescence for type IV collagen and rat endothelial cell antigen-1 was also performed to determine co-localization of type IV collagen deposition and blood ***：At 1 week after spinal cord

关键词： fibrotic scar olfactory ensheathing cell transplantation spinal cord injury neural regeneration rats

Spatial configuration engineering of perylenediimide-based non-fullerene electron transport materials for efficient inverted perovskite solar cells

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Journal of Energy Chemistry 2021年第5期30卷 374-382页

作者： Mengmeng Zheng Yawei Miao Ali Asgher Syed Cheng Chen xichuan Yang Liming Ding Huaming Li Ming Cheng Institute for Energy Research School of Materials Science&EngineeringJiangsu UniversityZhenjiang 212013JiangsuChina State Key Laboratory of Fine Chemicals Institute of Artificial PhotosynthesisDUT−KTH Joint Education and Research Center on Molecular DevicesDalian University of Technology(DUT)Dalian 116024LiaoningChina Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Due to their excellent photoelectron chemical properties and suitable energy level alignment with perovskite,perylene diimide(PDI)derivatives are competitive non-fullerene electron transport material(ETM)candidates for perovskite solar cells(PSCs).However,the conjugated rigid plane structure of PDI units result in PDI-based ETMs tending to form large aggregates,limiting their application and photovoltaic *** this study,to restrict aggregation and further enhance the photovoltaic performance of PDI-type ETMs,two PDI-based ETMs,termed PDO-PDI2(dimer)and PDO-PDI3(trimer),were constructed by introducing a phenothiazine 5,5-dioxide(PDO)core building *** research manifests that the optoelectronic properties and film formation property of PDO-PDI2 and PDO-PDI3 were deeply affected by the molecular spatial *** in PSCs,PDO-PDI3 with threedimensional spiral molecular structure,exhibits superior electron extraction and transport properties,further achieving the best PCE of 18.72%and maintaining 93%of its initial efficiency after a 720-h aging test under ambient conditions.

关键词： Non-fullerene Electron transport material Perovskite solar cell Inverted structure