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Low-power nonlinear enhanced electromagnetic transmission of a subwavelength metallic aperture

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Photonics Research 2018年第12期6卷 1102-1106页

作者： yunsheng guo SAIYU LIU KE BI MING LEI JI ZHOU Department of Applied Physics Inner Mongolia University of Science & Technology State Key Laboratory of Information Photonics and Optical Communications & School of Science Beijing University of Posts and Telecommunications State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University

When a dielectric meta-atom is placed into a subwavelength metallic aperture, 20-fold enhanced electromagnetic transmission through the aperture is realized at the meta-atom's resonant frequency. Additionally, when the incident electromagnetic power increases, thermal energy gathered by the meta-atom, which is converted from electromagnetic losses, can cause the meta-atom's temperature to increase. Because of the high temperature coefficient of the meta-atom's resonant frequency, this temperature increase causes a blueshift in the transmission peak. Therefore, this frequency-dependent enhanced electromagnetic transmission even produces a nonlinear effect at low incident powers. Over an incident power range from 0 to 20 dBm, measured and simulated spectra near the meta-atom's resonant frequency show distinctly nonlinear transmission.

关键词： Subwavelength metal aperture Electromagnetic power Resonance frequency

Innovations in metallurgical and materials processes:advancing liquid theory and honoring ***-jie guo's contributions to physical chemistry in metallurgy

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Journal of Iron and Steel Research International 2024年第1期31卷 1-2页

作者： Shuai Liu Jing guo Han-jie guo School of Artificial Intelligence Beijing Technology and Business UniversityBeijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China

Spanning three decades,***-jie guo's research group has dedicated itself to exploring the fundamental theories and practical applications of physical chemistry within the realm of *** under the assumption that molecul... 详细信息

关键词： chemistry liquid complexes

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一种二阶LTCC微波带通滤波器的仿真设计

电子元件与材料 2010年第10期29卷 58-60页

作者：郭云胜内蒙古科技大学应用物理系内蒙古包头014010

根据低温共烧陶瓷技术的特点,提出了一种二阶微波带通滤波器的三维结构设计方法,设计的滤波器结构简单、尺寸小、工作频率可调。按照该设计方法,通过电磁仿真软件AnsoftHFSS10设计了一款带通滤波器。结果表明,该滤波器的中心频率为5.2G... 详细信息

根据低温共烧陶瓷技术的特点,提出了一种二阶微波带通滤波器的三维结构设计方法,设计的滤波器结构简单、尺寸小、工作频率可调。按照该设计方法,通过电磁仿真软件AnsoftHFSS10设计了一款带通滤波器。结果表明,该滤波器的中心频率为5.2GHz,带宽为0.4GHz,通带内插损小于2.1dB,尺寸为2.5mm×2.2mm×0.4mm,能够满足微波无线通信系统的要求。

关键词：微波带通滤波器低温共烧陶瓷设计

Emerging direct current triboelectric nanogenerator for high-entropy mechanical energy harvesting

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Science China(Technological Sciences) 2024年第5期67卷 1297-1316页

作者： CHEN Jie guo RuiLong guo HengYu College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Department of Applied Physics Chongqing UniversityChongqing 401331China

In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical *** overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in *** device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)***,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)*** recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require *** this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air *** typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are ***,the applications of DC-TENGs in various scenarios are ***,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.

关键词： TENG direct current working mechanisms output performance limitations optimization strategies

Physicochemical principles of hydrogen metallurgy in blast furnace

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Journal of Iron and Steel Research International 2024年第1期31卷 46-63页

作者： Han-jie guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing100083China

Based on the stoichiometric method and the free energy minimization method,an ideal model for the reduction of iron oxides by carbon and hydrogen under blast furnace conditions was established,and the reduction efficiency and theoretical energy consumption of the all-carbon blast furnace and the hydrogen-rich blast furnace were *** results show that after the reduction reaction is completed at the bottom of the blast furnace,the gas produced by reduction at 1600℃still has a certain excessive reduction capacity,which is due to the hydrogen brought in by the hydrogen-rich blast as well as the excess carbon monoxide generated by the reaction of the coke and the oxygen brought in by the *** the process of the gas with excessive reduction capacity rising from the bottom of the blast furnace and gas reduction process,the excessive reduction capacity of the gas gradually decreases with the increase in the dydrogen content in the *** the all-carbon blast furnace,the excess gas reduction capacity is the strongest,and the total energy consumption per ton of iron reduction is the *** shows that,for the current operation mode of the blast furnace,adding hydrogen in the blast furnace cannot reduce the consumption of carbon required for reduction per ton of iron,but rather increases the consumption of carbon.

关键词： Hydrogen metallurgy Excess gas reduction capacity Theoretical energy consumption Hydrogen-rich blast furnace Thermodynamic model Gibbs minimum free energy method

Control Strategies for Digital Twin Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 170-180页

作者： guo-Ping Liu IEEE the Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China

With the continuous breakthrough in information technology and its integration into practical applications, industrial digital twins are expected to accelerate their development in the near future. This paper studies various control strategies for digital twin systems from the viewpoint of practical *** make full use of advantages of digital twins for control systems, an architecture of digital twin control systems, adaptive model tracking scheme, performance prediction scheme, performance retention scheme, and fault tolerant control scheme are proposed. Those schemes are detailed to deal with different issues on model tracking, performance prediction, performance retention, and fault tolerant control of digital twin systems. Also, the stability of digital twin control systems is analysed. The proposed schemes for digital twin control systems are illustrated by examples.

关键词： Digital twin control systems fault tolerant control model tracking performance prediction performance retention

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COX-2在肝细胞癌侵袭转移中的作用

天津医药 2007年第3期35卷 167-169页

作者：郭运生彭利高霞河北省秦皇岛市第一医院普外科 066000 河北医科大学第四医院肝胆外科秦皇岛市海港区卫生防疫站

目的:研究环氧合酶-2(COX-2)在肝细胞癌中的表达及其与基质金属蛋白酶(MMP)-2、MMP-9的关系。方法:应用免疫组织化学方法检测43例肝细胞癌组织和6例肝硬化组织及10例正常肝组织中COX-2、MMP-2和MMP-9的表达。结果:肝癌组织中的COX-2表... 详细信息

目的:研究环氧合酶-2(COX-2)在肝细胞癌中的表达及其与基质金属蛋白酶(MMP)-2、MMP-9的关系。方法:应用免疫组织化学方法检测43例肝细胞癌组织和6例肝硬化组织及10例正常肝组织中COX-2、MMP-2和MMP-9的表达。结果:肝癌组织中的COX-2表达高于肝硬化组织和正常肝组织中的表达;在不同性别、年龄、肿瘤大小、包膜、门静脉癌栓、甲胎球蛋白(AFP)和组织分化者癌组织中COX-2蛋白的表达差异均无统计学意义(P>0.05)。COX-2与MMP-2和MMP-9的表达有相关性(r分别为0.508和0.368,P<0.01)。MMP-2和MMP-9蛋白表达之间呈正相关(r=0.472,P<0.01)。结论:COX-2可能通过增加MMP-2和MMP-9的表达而促进肝细胞癌的侵袭和转移。

关键词：癌肝细胞前列腺素内过氧化物合酶肿瘤转移基质金属蛋白酶类免疫组织化学

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超材料完美吸波器的等效电路模型研究

电子元件与材料 2021年第6期40卷 578-583页

作者：陆浩然郭云胜中国核科技信息与经济研究院北京100084 内蒙古科技大学理学院内蒙古包头014010

为了用等效电路理论描述超材料完美吸波的电磁特性,把它们的单元结构分为两类:第一类由电谐振器和磁谐振器组成,不含金属底板;第二类由金属底板及其上面的金属或介质谐振器组成。根据电磁波与超材料单元结构相互作用的特点,采用一端口... 详细信息

为了用等效电路理论描述超材料完美吸波的电磁特性,把它们的单元结构分为两类:第一类由电谐振器和磁谐振器组成,不含金属底板;第二类由金属底板及其上面的金属或介质谐振器组成。根据电磁波与超材料单元结构相互作用的特点,采用一端口和二端口网络分别建立了有无金属底板单元结构的等效电路模型。利用电路仿真软件ADS提取了两种无金属底板单元结构的等效参数,由这些参数计算得到与CST全波电磁仿真一致的吸收频率和带宽。研究结果表明等效电路模型的正确性,也合理解释了超材料完美吸波的工作机理。

关键词：超材料等效电路二端口一端口完美吸收

Configuration Synthesis and Grasping Performance Analysis of Multi-Loop Coupling Capture Mechanism for Launch and Recovery of Torpedo-Shaped Autonomous Underwater Vehicle

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China Ocean Engineering 2024年第3期38卷 453-466页

作者： ZHANG guo-xing XIA Xin-lu guo Jin-wei School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China

Research of capture mechanisms with strong capture adaptability and stable grasp is important to solve the problem of launch and recovery of torpedo-shaped autonomous underwater vehicles(AUVs).A multi-loop coupling capture mechanism with strong adaptability and high retraction rate has been proposed for the launch and recovery of torpedo-shaped AUVs with different morphological ***,the principle of capturing motion retraction is described based on the appearance characteristics of torpedo-shaped AUVs,and the configuration synthesis of the capture mechanism is carried out using the method of constrained chain ***,the screw theory is employed to analyze the degree of freedom(DoF)of the capture ***,the 3D model of the capture mechanism is established,and the kinematics and dynamics simulations are carried *** with the capture orientation requirements of the capture mechanism,the statics and vibration characteristics analyses are carried ***,considering the capture process and the underwater working environment,the motion characteristics and hydraulics characteristics of the capture mechanism are ***,a principle prototype is developed and the torpedo-shaped AUVs capture experiment is *** work provides technical reserves for the research and development of AUV capture special equipment.

关键词： capture mechanism torpedo-shaped AUVs configuration synthesis launch and recovery grasping performance analysis