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Dual Wideband Antenna for WLAN/WiMAX and Satellite System Applications Based on a Metamaterial Transmission line

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Chinese Physics Letters 2012年第10期29卷 39-41页

作者： jin Da-lin HONG jing-Song XIONG han Institute of Applied Physics University of Electronic Science and TechnologyChengdu 610054

A dual band planar antenna based on metamaterial transmission lines is presented for WLAN,WiMAX,and satellite system communication *** antenna is composed of an interdigital capacitor and a ground plane with triangular shaped slots on its top edges to broaden the impedance *** measured bandwidth for 10 dB return loss is from 3.29 to 4.27 GHz and 5.04 to 9.8 GHz,covering the 5.2/5.8 GHz WLAN,3.5/5.5 GHz WiMAX bands,and the X-band satellite communication systems at 7.4 *** proposed antenna exhibits stable monopole-like radiation patterns and enough gains across the dual operating bands.

关键词： antenna WiMAX bands

Sulfuric acid leaching of high iron-bearing zinc calcine

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International Journal of Minerals,Metallurgy and Materials 2017年第11期24卷 1211-1216页

作者： jin-lin Yang Ji-guang Liu han-xin Xiao Shao-jian Ma College of Resources Environment and Materials Guangxi University Nanning 530004 China Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials Guangxi Zhuang Autonomous Region Guangxi University Nanning 530004 China

Sulfuric acid leaching of high iron-bearing zinc calcine was investigated to assess the effects of sulfuric acid concentration, liquid-to-solid ratio, leaching time, leaching temperature, and the stirring speed on the leaching rates of zinc and iron. The results showed that the sulfuric acid concentration, liquid-to-solid ratio, leaching time, and leaching temperature strongly influenced the leaching of zinc and iron, whereas stirring speed had little influence. Zinc was mainly leached and the leaching rate of iron was low when the sulfuric acid concentration was less than 100 g/L. At sulfuric acid concentrations higher than 100 g/L, the leaching rate of iron increased quickly with increasing sulfuric acid concentration. This behavior is attributed to iron-bearing minerals such as zinc ferrite in zinc calcine dissolving at high temperatures and high sulfuric acid concentrations but not at low temperatures and low sulfuric acid concentrations.

关键词： high iron-bearing zinc calcine sulfuric acid leaching zinc ferrite leaching rate

Compact multilayer dual-band bandpass filter design using stepped impedance resonators

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The Journal of China Universities of Posts and Telecommunications 2022年第5期29卷 99-104页

作者： han Yunan Liang Peiyun lin Yang Cheng Chunyue Yao Yuchen jin Ming Dai lin College of Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China Beijing Instituteof Space Launch Technology Beijing 100076China Beijing Institute of Radio Metrology and Measurement Beijing 100854China Liaohe Petroleum Exploration Bureau Communication Company Panjin 124010China

Compact dual-band bandpass filter(BPF)for the 5 th generation mobile communication technology(5 G)radio frequency(RF)front-end applications was presented based on multilayer stepped impedance resonators(SIRs).The multilayer dual-band SIR BPF can achieve high selectivity and four transmission zeros(TZs)near the passband edges by the quarter-wavelength tri-section *** multilayer dual-band SIR BPF is fabricated on a 3-layer FR-4 substrate with a compact dimension of 5.5 mm×5.0 mm×1.2 *** measured two passbands of the multilayer dual-band SIR BPF are 3.3 GHz-3.5 GHz and 4.8 GHz-5.0 GHz with insertion loss(IL)less than 2 dB *** measured and simulated results suggest that it is a possible candidate for the application of 5 G RF front-end at sub-6 GHz frequency band.

关键词： 5G RF front-end bandpass filter(BPF) stepped impedance resonator(SIR) strip line transmission zero(TZ)

Bioinspired Passive Tactile Sensors Enabled by Reversible Polarization of Conjugated Polymers

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Nano-Micro Letters 2025年第1期17卷 361-377页

作者： Feng He Sitong Chen Ruili Zhou hanyu Diao Yangyang han Xiaodong Wu School of Mechanical Engineering Sichuan UniversityChengdu 610065People’s Republic of China School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065People’s Republic of China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065People’s Republic of China

Tactile perception plays a vital role for the human body and is also highly desired for smart prosthesis and advanced *** to active sensing devices,passive piezoelectric and triboelectric tactile sensors consume less power,but lack the capability to resolve static ***,we address this issue by utilizing the unique polarization chemistry of conjugated polymers for the first time and propose a new type of bioinspired,passive,and bio-friendly tactile sensors for resolving both static and dynamic ***,to emulate the polarization process of natural sensory cells,conjugated polymers(including poly(3,4-ethylenedioxythiophen e):poly(styrenesulfonate),polyaniline,or polypyrrole)are controllably polarized into two opposite states to create artificial potential *** controllable and reversible polarization process of the conjugated polymers is fully in situ ***,a micro-structured ionic electrolyte is employed to imitate the natural ion channels and to encode external touch stimulations into the variation in potential difference *** with the currently existing tactile sensing devices,the developed tactile sensors feature distinct characteristics including fully organic composition,high sensitivity(up to 773 mV N^(−1)),ultralow power consumption(nW),as well as superior *** demonstrations,both single point tactile perception(surface texture perception and material property perception)and two-dimensional tactile recognitions(shape or profile perception)with high accuracy are successfully realized using self-defined machine learning *** tactile sensing concept innovation based on the polarization chemistry of conjugated polymers opens up a new path to create robotic tactile sensors and prosthetic electronic skins.

关键词： Passive tactile sensors Reversible polarization of conjugated polymers Tactile perception Machine learning algorithm Object recognition

Microstructure and microsegregation of directionally solidified Ti–45Al–8Nb alloy with different solidification rates

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Rare Metals 2016年第1期35卷 70-76页

作者： Xiang-Jun Xu lin Song Xiao-Ou jin Dong-Dong han Xin Wang Jun-Pin lin Materials and Chemistry School Zhongyuan University of Technology State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing School of Architecture and Engineering Heilongjiang University

Microstructure and microsegregation of directionally solidified Ti-45Al-8Nb alloy were investigated by scanning electron microscopy（SEM）,transmission electron microscopy（TEM） and electron probe microanalyzer（EPMA）.For the alloy solidified at the solidification rates（v） ranging from 10 to 400 μm·s^（-1）,the microstructure of the mushy zone exhibits a cellular-dendritic structure at lower growth rate（v=10-50 μm·s^（-1）） and a typical dendritic morphology at higher growth rate（v = 100-400 μm·s^（-1））.The relationship between primary dendrite arm spacing（λ_1）and v is λ_1=1.08×10~3v^（-0.35）.Al and Nb elements segregate at interdendritic zone and in the dendritic core,*** solid of mushy zone,a relatively flat concentration profile is observed for the typical dendrite structure,and Nb enriches in B2 phase induced by β→α＋β*** content of B2 phase is hardly affected by *** extent of microsegregation in steady-state zone decreases at a lower growth rate because holding the samples at higher temperature after solidification for a long time can homogenize the solid effectively.

关键词： Nb-containing TiAl alloy Solidification Microstructure Microsegregation

Compact Ultra-wideband Microstrip Antenna with Metamaterials

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Chinese Physics Letters 2012年第11期29卷 60-62页

作者： XIONG han HONG jin-Song ZHU Qing-Yi jin Da-lin School of Physical Electronics University of Electronic Science and Technology of ChinaChengdu 610054

An improved compact ultra-wideband(UWB)microstrip antenna with metamaterials is *** total size is slightly reduced and the measured impedance bandwidth operates from 3.84 to 22.77 GHz for a return loss of less than-10 *** with the original patch antenna,the bandwidth of this antenna is about six times ***,the antenna has an average gain of 6.2 dB,which is 1.2 dB larger than the original *** strong radiation in the horizontal direction and practical characteristics are ***,this antenna would have some specific applications for UWB wireless communications in the future.

关键词： antenna wideband return

大坝施工信息PDA实时采集系统在长河坝施工中的应用

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水电能源科学 2018年第9期36卷 95-97页

作者：李瑞金林瀚文刘军马鹏奎杜军李元元天津大学水利工程仿真与安全国家重点实验室天津300072 四川大唐国际甘孜水电开发有限公司四川康定626001 四川二滩国际工程咨询有限责任公司四川成都610072 长江空间信息技术工程有限公司重庆分公司重庆401147

大坝施工过程中的施工信息对控制大坝施工质量具有十分重要的意义。长河坝为最大坝高240m的心墙堆石坝,施工规模大,工序复杂,为便于施工管理人员能够实时地获取施工过程所产生的大量数据,结合长河坝水电工程施工特点,基于GPS、GPRS等技... 详细信息

大坝施工过程中的施工信息对控制大坝施工质量具有十分重要的意义。长河坝为最大坝高240m的心墙堆石坝,施工规模大,工序复杂,为便于施工管理人员能够实时地获取施工过程所产生的大量数据,结合长河坝水电工程施工特点,基于GPS、GPRS等技术研究并开发了长河坝大坝施工信息PDA采集系统。应用效果表明,该系统实现了对大坝施工现场信息及上坝运输车辆信息的现场数据的实时采集,克服了传统的现场采集数据方法工作量大的缺点,且极大地提高了施工质量控制的实时性与有效性。

关键词：长河坝 PDA 信息采集质量监控应用

Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man han Deyang Zeng Wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen Wei Yufei Mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

Deflagration-to-Detonation Transition Induced by Hot Jets in a Supersonic Premixed Airstream

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Chinese Physics Letters 2013年第5期30卷 105-107页

作者： han Xu ZHOU jin lin Zhi-Yong LIU Yu Science and Technology on Scramjet Laboratory National University of Defense TechnologyChangsha 410073

Detonation is initiated through a hot jet in a supersonic premixed mixture of H2 and air,which is produced by using a air *** results show that initiation fails in the low-equivalence-ratio premixed *** the increase of equivalence ratio,the hot jet can induce deflagration to detonation transition(DDT)in the premixed mixture,which an indirect initiation of *** studies show that the DDT process is due to the combined effect of a local hemispherical explosion shock wave,the bow shock,and the flame produced by the hot jet.

关键词： mixed equivalence shock