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Science China(Information Sciences) 2024年第3期67卷 271-280页

作者： Shuiying XIANG shuang GAO Yuechun shi Yuna ZHANG Ziwei SONG Xingxing GUO Yahui ZHANG Yuxin MA Xiangfei CHEN State Key Laboratory of Integrated Service Networks Xidian University Yongjiang Laboratory 3. College of Engineering and Applied Sciences Nanjing University

We proposed and experimentally demonstrated a simple and novel photonic spiking neuron based on a distributed feedback(DFB) laser subject to side-mode optical pulse injection(SMOPI). The DFB laser chip is designed and fabricated based on asymmetric equivalent π phase shift(π-EPS) with the reconstruction-equivalent-chirp(REC) technique. Under side-mode continuous-wave(CW) optical injection,excitability pulse was experimentally observed during the dominant mode switching process due to the injection-locked effect. Based on the transition between the excitability regime and the side-mode injection locking effect, the controllable and repeatable neuron-like spiking response can be realized when external stimulus pulses are electro-optically modulated on the CW optical carrier. The experimental results show that the spike threshold, temporal integration, and refractory period, which are important spike processing mechanisms in biological neurons, can all be achieved in the optically-injected DFB laser. The experimental findings are also verified numerically with a rate equation model that considers the SMOPI. To the best of our knowledge, this is the first experimental demonstration of a photonic spiking neuron based on a DFB laser subject to SMOPI, which holds promise for realizing large-scale photonic spiking neuron arrays for hardware photonic spiking neural network chips.

关键词： neuromorphic photonics photonic spiking neuron DFB laser side-mode optical pulse injections

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房产税征税机理及其区域差异

改革 2014年第12期 62-69页

作者：史爽西南财经大学经济与管理研究院四川成都610041

可行的房产税征税方式既要保证税收的汲取力,又要兼顾征税对家庭收入分布的扭曲效应。利用中国家庭金融调查(CHFS)对8848户家庭住房持有的数据,实证测算不同房产税征税方式下税收收入总额,以及征税前后家庭收入分布的基尼系数。通过比... 详细信息

可行的房产税征税方式既要保证税收的汲取力,又要兼顾征税对家庭收入分布的扭曲效应。利用中国家庭金融调查(CHFS)对8848户家庭住房持有的数据,实证测算不同房产税征税方式下税收收入总额,以及征税前后家庭收入分布的基尼系数。通过比较征税总额和收入的基尼系数可知,相较对存量住房征收单一比例税率,按照住房持有情况征收差别累进税率可在不扩大家庭收入差距的前提下,保证税收的最大汲取力。另外,测算的税收收入从总额上与现有房地产领域所征收的其他税相当。

关键词：房产税改革税收增量税制改革

Combined intestinal microbiota and transcriptomic analysis to investigate the effect of different stocking densities on the ability of Pacific fi c white shrimp ( Litopenaeus vannamei) ) to utilize Chlorella sorokiniana

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ANIMAL NUTRITION 2024年第3期18卷 203-219页

作者： Yuan, Hang Xie, Minghua Chen, Jian Hu, Naijie Wang, Honming Tan, Beiping shi, Lili Zhang, shuang Guangdong Ocean Univ Coll Fisheries Zhanjiang Peoples R China Chinese Acad Trop Agr Sci Zhanjiang Expt Stn Zhanjiang Peoples R China Dalian Ocean Univ Coll Fisheries & Life Sci Dalian Peoples R China

Aiming to investigate the impact of different stocking densities on the ability of Pacific white shrimp (Litopenaeus vannamei) to utilize Chlorella sorokiniana (CHL), a 3 x 2 factorial design stocking experiment was used in this study. Specifically, shrimp was fed with two dietary protein sources (fishmeal [FM] and CHL) at low (LSD; 100 per m(3)), medium (MSD; 200 per m3) and high (HSD; 300 per m3) stocking densities for 8 weeks. The growth performance and resistance to Vibrio parahaemolyticus (1.0 x 107 CFU/ mL) of shrimp decreased with the increase of stocking density, but dietary CHL improved this result. Differences between the CHL and FM groups for V. parahaemolyticus resistance were significant only under high-density conditions (P shing services by

关键词： Chlorella sorokiniana Stocking density Microbiota structure Transcriptomic profile Litopenaeus vannamei CLARIAS-GARIEPINUS BURCHELL GROWTH-PERFORMANCE BODY-COMPOSITION RAINBOW-TROUT SPIRULINA-PLATENSIS ENZYME-ACTIVITIES MEAL REPLACEMENT FEED-UTILIZATION PROTEIN-SOURCES IMMUNE

18F-FDG PET/CT与MRI异机融合在高级别脑胶质瘤鉴别诊断中的价值

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中国CT和MRI杂志 2024年第3期22卷 1-4页

作者：姜双士刘烜利王超冯洪燕王科涂宁韩芳卜丽红武汉大学人民医院PET中心湖北武汉430061 大连大学附属中山医院PET中心辽宁大连116001

目的探讨18F-FDG PET/CT与MRI异机融合在高级别脑胶质瘤(HGG)诊断中的价值。方法回顾性分析90例经组织病理学证实的高级别脑胶质瘤(HGG)(n=31)、原发性中枢神经系统淋巴瘤(PCNSL)(n=20)和脑转移瘤(BM)(n=39)患者。所有患者同一天先后... 详细信息

目的探讨18F-FDG PET/CT与MRI异机融合在高级别脑胶质瘤(HGG)诊断中的价值。方法回顾性分析90例经组织病理学证实的高级别脑胶质瘤(HGG)(n=31)、原发性中枢神经系统淋巴瘤(PCNSL)(n=20)和脑转移瘤(BM)(n=39)患者。所有患者同一天先后接受18F-FDG PET/CT和MRI双倍剂量增强扫描。采用视觉分析3组患者的病灶分布和形态特征,以及半定量参数最大标准化摄取值(SUVmax)、标准化摄取值均值(SUVmean)、肿瘤与对侧相应部位正常脑组织SUVmax的比值(T/N),采用Mann-Whitney U检验和多因素回归分析及受试者工作特征(ROC)曲线分析两两组间关系。评价异机融合18F-FDG PETCT/MRI在HGG鉴别诊断中的价值。结果增强特征、占位效应和病灶部位在HGG、PCNSL和BM组间差异具有统计学意义(P<0.05);半定量分析中,PCNSL的SUVmax、SUVmean和T/N值均显著高于HGG(P<0.05)和BM(P<0.05)。ROC曲线分析显示,强化特征和SUVmean在区分HGG和PCNSL方面具有良好的诊断效能(AUC=0.927);SUVmax和强化特征可以作为PCNSL和BM组间良好的分类预测模型(AUC=0.918)。结论18F-FDG PET/CT代谢参数联合MR双倍剂量增强形态学特征在诊断和鉴别颅内HGG中具有重要的价值和意义。

关键词：神经胶质瘤氟脱氧葡萄糖F18 正电子发射断层显像术体层摄影术 X线计算机磁共振成像

多学科协作手术治疗颈静脉孔区颅内外沟通型肿瘤的临床分析

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临床神经外科杂志 2024年第2期21卷 126-131页

作者：蒋涛石爽辛运李林峰王星宇吴越夏海坚唐文渊孙晓川钟东重庆医科大学附属第一医院神经外科重庆400016

目的总结分析多学科协作手术切除颈静脉孔区哑铃型肿瘤的临床疗效。方法回顾性分析2011年4月—2023年7月重庆医科大学附属第一医院神经外科后颅底脑干组收治的5例多学科协作手术治疗的颈静脉孔区颅内外沟通型肿瘤患者的临床资料。采集... 详细信息

目的总结分析多学科协作手术切除颈静脉孔区哑铃型肿瘤的临床疗效。方法回顾性分析2011年4月—2023年7月重庆医科大学附属第一医院神经外科后颅底脑干组收治的5例多学科协作手术治疗的颈静脉孔区颅内外沟通型肿瘤患者的临床资料。采集信息包括一般情况、临床表现、专科检查、辅助检查、手术方法、术后并发症、病理及随访结果。结果所有病例均由神经外科、耳鼻咽喉科、颌面外科行MDT讨论并采用MDT手术治疗方案,其中2例行颞下窝Fisch A型联合颈部入路,3例行颅颈联合入路。5例患者中次全切除4例,部分切除1例。术后病理结果提示脑膜瘤2例,神经鞘瘤1例,副神经节瘤1例,脊索瘤1例。术后后组颅神经损伤3例,面瘫3例,听力下降2例,脑脊液漏2例,颅内感染3例。平均随访时间51.8个月(8~150个月);平均随访卡氏功能状态评分(KPS)90分(80~100分)。结论多学科协作手术不仅增加了颈静脉孔区哑铃型肿瘤的切除程度,而且提高了颈静脉孔区哑铃型肿瘤的手术安全性。当全切除较为困难或可能导致较为严重的并发症时,次全切除后辅助放疗也是一种较好的治疗方案。

关键词：颈静脉孔区哑铃型肿瘤多学科协作手术显微外科手术

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Constructing a 3D multichannel structure to enhance performance of Ni–Co–Mn hydroxide electrodes for flexible supercapacitors

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Rare Metals 2024年第1期43卷 148-163页

作者： Zhi-Hui Xu shi-Shuai Sun Xue-Lei Li Zhi-Hui Zhang Hai-Ying Li shuang-Ting Ruan Shou-Gen Yin Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education)and Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China College of Science Tianjin University of TechnologyTianjin 300384China School of Materials Science and Engineering Inner Mongolia University of TechnologyHohhot 010051China

The balancing of the electrochemical performance,mechanical stability,and processing technology for applying supercapacitors to flexible and wearable electronics continues to encounter severe ***,we prepare Ni-Co-Mn hydroxide electrodes with a threedimensional multichannel structure via a simple hydrothermal *** are constructed using vertically contiguous nano sheets with a uniform thickness and rough *** electrodes can provide numerous electroactive sites and accelerate the transmission of electrolyte *** relationship between the structure and electrochemical performances is verified by experiments and theoretical ***-dimensional(2D)planar and one-dimensional(1D)fiber electrodes are prepared using a flexible carbon cloth(CC)and carbon fiber(CF),respectively,as *** assembled quasi-solid-state flexible asymmetric supercapacitor(FASC)with a twodimensional sandwich structure using NiCoMn-OH/CC as the electrode achieves a remarkable energy density of73.8 Wh·kg^(-1)at a power density of 1.03 kW·kg^(-1).The quasi-solid-state FASC with a 1D linear structure using NiCoMn-OH/CF as the electrode also attains a high energy density(12.9 Wh·kg^(-1)at a power density of0.75 W·kg^(-1)).Moreover,the electrochemical performances of the NiCoMn/CC//AC/CC and NiCoMn/CF//AC/CF FASCs are not disturbed at different bending angles(0°,45°,90°,135°and 180°),This indicates the superior flexibility of the *** also assemble a self-powered energy-harvesting storage system by integrating FASCs and commercial solar cells to verify its *** displays sustainable development potential for energy storage.

关键词： Supercapacitors Flexible Ni–Co–Mn hydroxide 3D multichannel structure High performances

Electroacupuncture Promotes Angiogenesis in Mice with Cerebral Ischemia by Inhibiting miR-7

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Chinese Journal of Integrative Medicine 2024年第6期30卷 543-550页

作者： YU Qian SHU shi JU Xin-yao PENG Wei REN Xue-qi SI Shu-han SONG shi-zhen XIE Xue-yun FANG Bang-jiang ZHOU shuang School of Acupuncture-Moxibustion and Tuina Shanghai University of Traditional Chinese MedicineShanghai201203China College of Basic Medicine Shanghai University of Traditional Chinese MedicineShanghai201203China Department of Emergency Longhua HospitalShanghai University of Traditional Chinese MedicineShanghai200032China

Objective To observe the angiogenesis effect of electroacupuncture(EA)at Shuigou acupoint(GV 26)in the treatment of cerebral ischemia,and explore the value of miRNA-7(miR-7)in *** First,48 mice were randomly divided into sham operation,middle cerebral artery occlusion(MCAO)model,and EA treatment *** 9 mice were divided into carrier control group,miR-7 knockout group and miR-7 overexpression group(n=3 each group).Finally,20 mice were divided into model and carrier control group,model and miR-7 knockout group,EA treatment and carrier control group and EA treatment and miR-7 overexpression group,with 3–6 mice in each *** MCAO model was established in the MCAO and EA *** deficit score and 2,3,5-triphenyltetrazolium chloride(TTC)staining were used to evaluate the severity of cerebral ***-eosin staining was used to describe basic pathological *** was used to quantify cerebral microvessel ***-time PCR and Western blot were used to detect the expression of miR-7 and its downstream target genes Krüppel-like factor 4/vascular endothelial growth factor(KLF4/VEGF)and angiopoietin-2(ANG-2)in the ischemic cerebral *** After EA,neurological deficit scores and infarction volumes decreased,and the density of cerebral microvessels *** the MCAO group,miR-7 expression was higher than that in the sham group(P<0.01).After EA at GV 26,miR-7 expression decreased(P<0.01)and the expression of downstream target genes KLF4/VEGF and ANG-2 increased as compared with the MCAO group(P<0.01).After EA combined with overexpression of miR-7,the expression of downstream target genes KLF4/VEGF and ANG-2 decreased compared to the control EA group(P<0.01).After miR-7 knockdown,the expression of KLF4/VEGF and ANG-2 increased(P<0.05 or P<0.01).Conclusions EA could promote angiogenesis in MCAO mice likely by inhibiting the expression of miR-7 and relieving inhibition of downstream target genes KLF4/VEG

关键词： electroacupuncture cerebral ischemia miRNA-7 angiogenesis Shuigou(GV 26) acupuncture points

电子束熔炼制备太阳能级多晶硅的研究现状与发展趋势

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无机材料学报 2015年第8期30卷 785-792页

作者：谭毅石爽姜大川大连理工大学材料科学与工程学院大连116024 大连理工大学辽宁省太阳能光伏系统重点实验室大连116024

电子束熔炼具有高能量密度、高真空度等优点,能够有效地去除硅中的挥发性杂质,使其在制备太阳能级多晶硅材料方面具有巨大的优势和广阔的应用前景,目前已经实现了产业化应用,成为冶金法制备太阳能级硅材料的关键环节之一。本文在阐述挥... 详细信息

电子束熔炼具有高能量密度、高真空度等优点,能够有效地去除硅中的挥发性杂质,使其在制备太阳能级多晶硅材料方面具有巨大的优势和广阔的应用前景,目前已经实现了产业化应用,成为冶金法制备太阳能级硅材料的关键环节之一。本文在阐述挥发性杂质去除的热力学原理的基础上,对其去除效果和去除机制进行了总结。同时,针对电子束熔炼技术目前存在的问题,结合作者在这些方面的探索,从数值模拟、节能型熔炼方式以及与定向凝固技术的耦合等角度对现阶段的研究重点进行了综述,并对其未来的发展趋势进行了展望。

关键词：电子束熔炼多晶硅挥发性杂质综述

Value of Commonality in Multiple Stage Assembly Products

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Systems Science and Systems Engineering 2002年第2期11卷 197-202页

作者： shi shuang-yuan, ZHANG Jin-long, CAI Shu-qin College of Management, Huazhong University of Science and TechnologyWuhan 430074, China College of Management Huazhong University of Science and Technology Wuhan 430074 China

This paper presents a systematic approach to estimate the value of commonality in products that involve multiple stage assemblies. In particular, the inventory savings are quantified with a mathematical model. The purpose is to assist product deisgn teams to make rational decisions in assigning unique parts or pursuing component standardization. In order to enhance the usability of the model, approximations are made to simplify the model and calculations.

关键词： component commonality multi-stage assembly system

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相控阵全光移相网络对空间波束电平的影响

电子与信息学报 2014年第7期36卷 1762-1766页

作者：苏君邱琪史双瑾电子科技大学光电信息学院成都610054

全光移相网络以其宽带、高精度的优势极大地提高了光控相控阵天线的性能,但其引入的附加相位噪声,将导致空间波束电平指标劣化。基于全光移相网络噪声理论和相控阵理论,推导了激光器相对强度噪声、光载波传输链路插入损耗、激光器输出... 详细信息

全光移相网络以其宽带、高精度的优势极大地提高了光控相控阵天线的性能,但其引入的附加相位噪声,将导致空间波束电平指标劣化。基于全光移相网络噪声理论和相控阵理论,推导了激光器相对强度噪声、光载波传输链路插入损耗、激光器输出平均光功率与主、副瓣电平关系的理论公式。仿真结果表明在全光移相网络的典型应用参数下,上述3个参量的增大均会导致波束主瓣增益降低和副瓣电平升高,其中激光器相对强度噪声影响最为明显,为了优化波束电平指标,激光器相对强度噪声需低于-140 dB/Hz。

关键词：相控阵天线全光移相网络波束形成波瓣电平