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Further results on local stability of LRC-RED algorithm in Internet

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The Journal of China Universities of Posts and Telecommunications 2012年第5期19卷 99-103页

作者： zhan zhen-qiu ZHU Jie SUN Yi-Jin Department of Electronic Engineering Shanghai Jiao Tong UniversityShanghai 200240China

This paper presents some further results on the local stability of a recently developed Intemet congestion control scheme, namely the loss ratio and rate control random early detection （LRC-RED） algorithm. Necessary and sufficient stability conditions in terms of key tuning parameters are derived, which can provide further guidelines for control gain selection. The numerical simulations are given to illustrate the correctness of the theoretical analysis.

关键词： congestion control LRC-RED stability time delay system

基于DSP和CPLD的虚拟数字示波器的设计

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山西电子技术 2007年第3期 37-39页

作者：詹振球南京工业大学信息科学与工程学院江苏南京210009

虚拟数字示波器是由计算机、数据采集卡及相应的控制软件组成的,它可以根据需要只要改变软件就可以改变仪器的功能,具有高速、实时、多功能、便携等显著特点。本文介绍了一种以DSP与CPLD为核心的虚拟数字示波器的设计,它由信号调理与A/... 详细信息

虚拟数字示波器是由计算机、数据采集卡及相应的控制软件组成的,它可以根据需要只要改变软件就可以改变仪器的功能,具有高速、实时、多功能、便携等显著特点。本文介绍了一种以DSP与CPLD为核心的虚拟数字示波器的设计,它由信号调理与A/D变换电路、逻辑控制电路、数据处理电路组成,通过USB2.0总线与主机相连接。该系统可实现的最高采样率为100MHz,并且该系统可通过添加软件来增加数字信号处理功能。

关键词： DSP CPLD 虚拟数字示波器 USB LabWindows/CVl

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有源微波冷噪声源技术研究进展

电子设计工程 2017年第3期25卷 167-170,175页

作者：董帅王振占贺秋瑞中国科学院国家空间科学中心微波遥技术重点实验室北京100190 中国科学院大学北京100190

介绍了微波冷噪声原理,系统阐述了有源微波冷噪声源设计方法,重点分析了关键设计环节对噪声源性能产生的影响,梳理了国内外有源微波冷噪声源技术的发展历程和最新进展,分析了采用有源微波冷噪声源进行微波辐射计两点定标的重要意义、应... 详细信息

介绍了微波冷噪声原理,系统阐述了有源微波冷噪声源设计方法,重点分析了关键设计环节对噪声源性能产生的影响,梳理了国内外有源微波冷噪声源技术的发展历程和最新进展,分析了采用有源微波冷噪声源进行微波辐射计两点定标的重要意义、应用方案和技术优势。

关键词：有源微波冷噪声源微波辐射计定标 HEMT

Design of a terahertz slotted waveguide array antenna based on photonic crystal

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Optoelectronics Letters 2025年

作者： PAN Wu YE Kuan zhanG zhen LI Renpu qiu Sen HUANG Lei College of Photoelectronic Engineering， Chongqing University of Posts and Telecommunications Chongqing Municipal Key Laboratory of Photoelectric Information Sensing and Transmission Technology， Chongqing University of Posts and Telecommunications Laboratory of Quantum Information Technology， Chongqing University of Posts and Telecommunications

In this paper， a terahertz slotted waveguide array antenna is designed based on photonic crystal， which can realize efficient radiation of terahertz waves. The electromagnetic wave is fed from the rectangular waveguide at the bottom of the antenna， coupled to photonic crystal waveguide through photonic crystal cavity， and radiated outward through slots at the top layer of antenna. The simulation results show that the antenna achieves a peak gain of 13.45dBi at 360 GHz， a half-power beamwidth of 10.9o， and a side lobe level of -13.9dB. The antenna based on photonic crystal has the advantages of low profile， low loss， and high radiation efficiency， which can be applied to terahertz wireless communication systems.

关键词：

脉波指示剂连续心排血量监测在心搏骤停后综合征患者中的应用与护理

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解放军护理杂志 2011年第16期28卷 31-33页

作者：陈淑兰刘刚张秋真陈秋恋解放军第180医院普外科福建泉州362000

目的探讨脉波指示剂连续心排血量监测(pulse index continuous cardiac output,PICCO)在心搏骤停后综合征(post-cardiac arrest syndrome,PCAS)患者中的应用效果及护理。方法制定操作流程、置管配合、测量的注意事项和护理要点。结果 1... 详细信息

目的探讨脉波指示剂连续心排血量监测(pulse index continuous cardiac output,PICCO)在心搏骤停后综合征(post-cardiac arrest syndrome,PCAS)患者中的应用效果及护理。方法制定操作流程、置管配合、测量的注意事项和护理要点。结果 15例患者通过早期采用了PICCO监测,并采取了相应的护理措施,均未出现并发症,除了1例患者因多器官功能衰竭死亡外,3例患者放弃治疗,其余11例患者均存活。结论对PCAS患者早期进行PICCO监测,能对患者进行更准确的血流动力学监测,可以有效协助液体管理,维持患者生命体征的稳定,挽救患者生命。

关键词：脉波指示剂连续心排血量监测心搏骤停后综合征护理

船舶机舱自动检测系统中虚拟数字示波器的设计

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舰船科学技术 2009年第1期31卷 68-70,74页

作者：刘玉良张艳春赵秋亮詹振球浙江海洋学院机电工程学院浙江舟山316004 上海交通大学电子信息与电气工程学院上海200240

为了提高船舶机舱检测的自动化程度,本文以数字信号处理芯片、复杂可编程逻辑器件和USB接口芯片为核心硬件,设计了一个虚拟数字示波器,用于检测和显示船舶机舱内油压、油温、水温、转速等参数。该数字示波器由信号调理与A/D变换、逻辑... 详细信息

为了提高船舶机舱检测的自动化程度,本文以数字信号处理芯片、复杂可编程逻辑器件和USB接口芯片为核心硬件,设计了一个虚拟数字示波器,用于检测和显示船舶机舱内油压、油温、水温、转速等参数。该数字示波器由信号调理与A/D变换、逻辑控制、数据处理等电路组成,实验表明达到了预期的检测目的。该设备通过USB总线与主机相连接,功能的加载和更新由软件实现,因而具有灵活、实时、多功能等优点。

关键词： DSP CPLD 虚拟数字示波器 USB

Reducing LncRNA-5657 expression inhibits the brain inflammatory reaction in septic rats

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Neural Regeneration Research 2021年第7期16卷 1288-1293页

作者： Yi-An zhan Xin-Liang qiu Xu-zhen Wang Ning Zhao Ke-Jian Qian Department of Critical Care Medicine the First Affiliated Hospital of Nanchang UniversityNanchangJiangxi ProvinceChina Department of Critical Care Medicine Xingguo County People’s HospitalGanzhouJiangxi ProvinceChina

Our preliminary study found that the long noncoding RNA(LncRNA)-5657 can reduce the expression of inflammatory factors during inflammatory reactions in rat glial ***, the role played by LncRNA-5657 during septic brain injury remains *** the present study, rat models of septic encephalopathy were established by cecal ligation and puncture, and then the rats were treated with a hippocampal injection small hairpin RNA(sh RNA) against LncRNA-5657(sh-LnCRNA-5657).The sh-LncRNA-5657 treatment reduced the level of neuronal degeneration and necrosis in the rat hippocampus, reduced the immunoreactivities of aquaporin 4, heparanase, and metallopeptidase-9, and lowered the level of tumor necrosis *** cells were pre-treated with sh-LncRNA-5657 and then treated with 1 μg/mL ***-LncRNA-5657 transfection decreased the expression of LncRNA-5657 in lipopolysaccharide-treated glial cells and decreased the mRNA and protein levels of tumor necrosis factor-alpha, interleukin-1β, and *** findings suggested that LncRNA-5657 expression can significantly reduce the inflammatory reaction during septic encephalopathy and induce protective effects against this *** study was approved by the Institutional Ethics Committee at the First Affiliated Hospital of Nanchang University of China(approval No.2017-004) in 2017.

关键词： brain injury glial cells inflammation injury lipopolysaccharide long noncoding RNA repair sepsis

Monomer reactivity ratios for fluoroacrylate and butyl methacrylate in miniemulsion copolymerizations initiated by potassium persulphate

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Chinese Chemical Letters 2009年第4期20卷 478-482页

作者： Qing Hua zhang zhen Huan Luo Xiao Li zhan Feng qiu Chen College of Materials Science and Chemical Engineering Zhejiang University Hangzhou 310027 China

Miniemulsion copolymerization of butyl mathacrylate （BMA） with fluoroacrylate （HFMA, TFMA） was carried out at 70 ℃ by employing potassium persulphate （KPS） as initiator. Copolymer compositions at low conversion levels were determined by ^1H NMR spectra techniques. The reactivity ratios were evaluated by employing Kellen-Tudos （K-T） methods, which yields the apparent reactivity ratios, rBMA = 0.74, rHFMA = 0.87 and rBMA = 0.73, rTFMA = 0.75, respectively, and Q- and e-values of HFMA and TFMA were calculated by the Alfrey-Price method. The results show that HFMA and TFMA are more active than BMA, and the cross-propagation rate constant is greater than the self-propagation one in these two copolymerizations.

关键词： Fluoroacrylate Reactivity ratios Miniemulsion Copolymerization

Lattice relaxation,mirror symmetry and magnetic field effects on ultraflat bands in twisted trilayer graphene

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Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 114-120页

作者： Zewen Wu zhen zhan Shengjun Yuan Key Laboratory of Artificial Mic ro-and Nano-strucures of the Minisry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China

Twisted graphene multilayers exhibit strongly correlated insulating states and superconductivity due to the presence of ultraflat bands near the charge neutral *** this paper,the response of ultraflat bands to lattice relaxation and a magnetic field in twisted trilayer graphene(tTLG)with different stacking arrangements is investigated by using a full tight-binding *** show that lattice relaxations are indispensable for understanding the electronic properties of tTLG,in particular,of tTLG in the presence of mirror *** relaxations renormalize the quasiparticle spectrum near the Fermi energy and change the localization of higher energy flat ***,different from the twisted bilayer graphene,the Hofstadter butterfly spectrum can be realized at laboratory accessible strengths of magnetic *** work verifies tTLG as a more tunable platform than the twisted bilayer graphene in strongly correlated phenomena.

关键词： flat bands twisted trilayer graphene lattice relaxation mirror symmetry magnetic field tight-binding