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Output Enhancement of a THz Wave Based on a Surface-Emitted THz-Wave Parametric Oscillator

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Chinese Physics Letters 2011年第11期28卷 103-105页

作者： LI Zhong-Yang YAO Jian-Quan xu de-gang BING Pi-Bin ZHONG Kai North China University of Water Resources and Electric Power Zhengzhou 450011 College of Precision Instrument and Opto-electronics Engineering Institute of Laser and Opto-electronicsTianjin UniversityTianjin 300072

High-power nanosecond pulsed THz-wave radiation is achieved via a surface-emitted THz-wave parametric *** MgO:LiNbO3 crystal with large volume is used as the gain ***-wave radiation from 1.084 THz to 2.654 THz is *** maximum THz-wave average power is 5.8W at 1.93 THz when the pump energy is 84 mJ,corresponding to a energy conversion efficiency of 6.9×10^(−6).The polarization characteristics of THz wave are *** the experiments the radiations of the first-order and the second-order Stokes wave are observed.

关键词： polarization pump wave

High-Power Terahertz Radiation Based on a Compact Eudipleural THz-Wave Parametric Oscillator

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Chinese Physics Letters 2011年第6期28卷 145-148页

作者： LI Zhong-Yang YAO Jian-Quan LÜDa xu de-gang WANG Jing-Li BING Pi-Bin College of Precision Instrument and Opto-electronics Engineering Institute of Laser and Opto-electronicsTianjin UniversityTianjin 300072 Institute of Electric Power North China University of Water Resources and Electric PowerZhengzhou 450011 Key Laboratory of Opto-electronics Information Science and Technology(Ministry of Education) Tianjin UniversityTianjin 300072

Tunable high-power THz-wave radiation is achieved via a compact eudipleural THz-wave parametric *** maximum THz-wave output is 1.164 V at 1.755 THz when the pump energy is 90 *** the experiments we find that the maximum output of THz-wave moves to the high frequency band as the pump energy increases and this phenomenon is reasonably *** polarization characteristics of the THz-wave are analyzed.

关键词： pump polarization wave

High Energy Terahertz Parametric Oscillator Based on Surface-Emitted Configuration

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Chinese Physics Letters 2013年第2期30卷 139-142页

作者： xu de-gang ZHANG Hao JIANG Hao WANG Yu-Ye LIU Chang-Ming YU Hong LI Zhong-Yang SHI Wei YAO Jian-Quan Institute of Laser and Optoelectronics College of Precision Instrument and Optoelectronics EngineeringTianjin UniversityTianjin 300072 Key Laboratory of Optoelectronics Information Science and Technology(Ministry of Education) Tianjin UniversityTianjin 300072 North China University of Water Resources and Electric Power Zhenzhou 450011

We experimentally demonstrate a high power nanosecond pulsed terahertz(THz)-wave parametric oscillator(TPO)by using a wide pump beam.A surface emitted cavity configuration is employed to reduce the THz absorption in MgO:LiNbO_(3) *** THz wave can be tuned from 1 THz to 3 THz.A maximum THz output energy of 438 nJ/pulse is achieved at 1.56 Hz using a 4.5-mm-diameter pump beam with a pulse energy of 226 mJ pump energy with the repetition of 10 Hz,corresponding to the energy conversion efficiency of 1.94×10^(-6).

关键词： pump Configuration repetition

THz-Wave Difference Frequency Generation by Phase-Matching in GaAs/Al_(x)Ga_(1-x)As Asymmetric Quantum Well

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Chinese Physics Letters 2012年第6期29卷 133-136页

作者： CAO Xiao-Long WANG Yu-Ye xu de-gang ZHONG Kai LI Jing-Hui LI Zhong-Yang ZHU Neng-Nian YAO Jian-Quan College of Precision Instrument and Opto-electronics Engineering Institute of Laser and Opto-electronicsTianjin UniversityTianjin 300072 Key Laboratory of Opto-electronics Information Technology(Ministry of Education) Tianjin UniversityTianjin 300072 department of Computer Science and Technology Renai CollegeTianjin UniversityTianjin 301636

An asymmetric quantum well (AQW) is designed to emit a terahertz (THz) wave by using difference frequency generation (DFG) with the structure of GaAs/Al_(0.2)Ga_(0.8)As/Al_(0.5) Ga_(0.5)As under a doubly resonant *** is found that the second-order nonlinear susceptibility χ^((2)) varies with the two pump wavelengths,and it can reach the peak value of 1.61 μm/V when the wavelengths are given as λ_(p1) =9.756 μm and λ_(p2) =10.96 μm,*** numerical results show that the refractive index of one pump wave in the AQW is concerned with not only its own wavelength but also the other ***-matching inside the AQW can be obtained through the tuning of the two pump wavelengths.

关键词： pump tuning Phase

基于时间延时估计和自适应模糊滑模控制器的双机械臂协同阻抗控制

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控制与决策 2021年第6期36卷 1311-1323页

作者：李德昀徐德刚桂卫华中南大学自动化学院长沙410083

多机械臂的精准协同控制已成为当前机器人领域的研究难点,为实现双机械臂精准控制,通过建立双机械臂动力学模型,采用时间延时估计简化机械臂动力学模型,在保证控制系统稳定性的前提下,引入自适应模糊滑模控制器实现对估计误差的修正和补... 详细信息

多机械臂的精准协同控制已成为当前机器人领域的研究难点,为实现双机械臂精准控制,通过建立双机械臂动力学模型,采用时间延时估计简化机械臂动力学模型,在保证控制系统稳定性的前提下,引入自适应模糊滑模控制器实现对估计误差的修正和补偿,设计基于时间延时估计和自适应模糊滑模控制的双机械臂协同阻抗控制器,实现双机械臂协同操作的末端轨迹控制以及接触力精准控制.最后,将该控制器应用于两台六自由度机械臂仿真平台,实现双臂夹取和搬运同一目标物体的操作,通过与其他控制器进行对比实验,表明所设计的控制器具有响应快、无抖震、精度高的特点.

关键词：双机械臂协同操作阻抗控制时间延时估计滑模控制模糊控制自适应控制

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宪政需要的层次结构探究

湖南科技大学学报（社会科学版） 2012年第2期15卷 62-66页

作者：徐德刚湖南科技大学法学研究所湖南湘潭411201

宪政需要是公民、国家对政治形态的宪政特征、功能的认知而产生的一种期待,宪政需要是法律需要的下位概念,法律需要是宪政需要的逻辑前提。宪政需要具有层次性,由低向高分为三个层次:宪政权利需要、宪政规范需要及宪政秩序需要。结合中... 详细信息

宪政需要是公民、国家对政治形态的宪政特征、功能的认知而产生的一种期待,宪政需要是法律需要的下位概念,法律需要是宪政需要的逻辑前提。宪政需要具有层次性,由低向高分为三个层次:宪政权利需要、宪政规范需要及宪政秩序需要。结合中国宪政实际,按照宪政需要规律,提出宪政需要层次论,完善宪政需要层次结构的相应对策,以此来维护公民的宪政需要,推进国家的宪政建设。

关键词：宪政权利需要宪政规范需要宪政秩序需要

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THz光谱技术检测DNAN炸药含量的研究

光谱学与光谱分析 2013年第4期33卷 886-889页

作者：王高徐德刚姚建铨天津大学精密仪器与光电子工程学院激光与光电子研究所天津300072 天津大学光电信息技术科学教育部重点实验室天津300072 中北大学电子技术测试国家重点实验室山西太原030051

为了对一种新型低感熔铸炸药(DNAN)含量进行检测,设计了THz光谱相干探测系统,检测确定了DNAN的THz特征波长位置,又利用比尔朗伯定律求解了DNAN的含量。设计了由主控系统控制步进电机实现光电探测器微扫描的时间相干THz光谱检测系统,计... 详细信息

为了对一种新型低感熔铸炸药(DNAN)含量进行检测,设计了THz光谱相干探测系统,检测确定了DNAN的THz特征波长位置,又利用比尔朗伯定律求解了DNAN的含量。设计了由主控系统控制步进电机实现光电探测器微扫描的时间相干THz光谱检测系统,计算推导了DNAN含量求解需要的系统参数,获得了DNAN的THz特征光谱。实验采用三种方法分别对不同DNAN含量的爆炸物样品进行检测,结果显示,该系统精度接近目前广泛应用的THz光谱检测设备MINI-Z太赫兹光谱仪。在此基础上,设计了特征吸收峰优化算法,通过Origin软件仿真分析可知,该算法可以进一步提高系统的探测精度及稳定性。

关键词：太赫兹炸药检测特征吸收峰 2,4-二硝基苯甲醚

Xiangshao Granules Ameliorate Post-stroke depression by Inhibiting Activation of Microglia and IDO1 Expression in Hippocampus and Prefrontal Cortex

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Chinese Journal of Integrative Medicine 2025年第1期31卷 28-38页

作者： LI Cheng-gang xu Lu-shan SUN Liang xu Yu-hao CAO Xiang ZHAO Chen-chen XIA Sheng-nan ZHANG Qing-xiu xu Yun department of Neurology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing210008China State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases Nanjing UniversityNanjing210008China Jiangsu Key Laboratory for Molecular Medicine Medical School of Nanjing UniversityNanjing210008China Nanjing Neurology Medical Center Nanjing210008China

Objective To investigate the therapeutic effect of Xiangshao Granules(XSG)on post-stroke depression(PSD)and explore the underlying *** Forty-three C57BL/6J mice were divided into 3 groups:sham(n=15),PSD+vehicle(n=14),and PSD+XSG(n=14)groups according to a random number *** PSD models were constructed using chronic unpredictable mild stress(CUMS)after middle cerebral artery occlusion(MCAO).The sham group only experienced the same surgical operation,but without MACO and CUMS *** XSG group received XSG(60 mg/kg per day)by gavage for 4 *** mice in the sham and vehicle groups were given the same volume of 0.9%saline at the same *** body weight and behavior tests including open field test,sucrose preference test,tail suspension test,and elevated plus-maze test,were used to validate the PSD mouse ***-time fluorescence quantitative polymerase chain reaction(RT-qPCR),enzyme-linked immunosorbent assay(ELISA),and immunofluorescence staining were used to evaluate the anti-inflammatory effects of *** potential molecular mechanisms were explored and verified through network pharmacology analysis,Nissl staining,Western blot,ELISA,and RT-qPCR,*** The body weight and behavior tests showed that MCAO combined with CUMS successfully established the PSD *** alleviated neuronal damage,reduced the expressions of pro-apoptotic proteins Caspase-3 and B-cell lymphoma-2(BCL-2)-associated X(BAX),and increased the expression of anti-apoptotic protein BCL-2 in PSD mice(Pdecreased the expression of indoleamine 2,3-dioxygenase1(IDO1)and increased the concentration of 5-hydroxytryptamine in PSD mice(P<0.05 or P<0.01).Conclusion XSG could reverse

关键词： post-stroke depression Xiangshao Granules indoleamine 2,3-dioxygenase 1 Chinese medicine

世界女子体操优秀全能选手的单项竞争倾向特征

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山东体育学院学报 2009年第9期25卷 65-67页

作者：徐德刚山东枣庄学院体育系山东枣庄277160

采用文献资料法、数理统计法和逻辑推理法,系统分析了当今世界女子体操优秀全能选手的四个单项竞争倾向特征。结果表明:在2005年FIG"不封顶"新规则下,由2001年体操规则催生的单项奖牌扩大化趋势,在2005-2008奥运周期内相对萎缩。未来大... 详细信息

采用文献资料法、数理统计法和逻辑推理法,系统分析了当今世界女子体操优秀全能选手的四个单项竞争倾向特征。结果表明:在2005年FIG"不封顶"新规则下,由2001年体操规则催生的单项奖牌扩大化趋势,在2005-2008奥运周期内相对萎缩。未来大赛具备"顶尖项目"的优秀全能型选手,将可获得较大的奖牌竞争空间。全能选手的单项竞争力度将增大,但奖牌争夺将主要集中在高低杠、平衡木、自由体操三个项目上,而尤以高低杠争夺力度最大,其次是平衡木和自由体操。

关键词：竞争倾向女子全能单项