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Antenna-in-Package (AiP) Technology

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Engineering 2022年第4期8卷 18-20页

作者： yueping zhang School of Electrical and Electronic Engineering Nangyang Technological UniversitySingapore 639798Singapore

*** Since the mid-1990s,the complementary metal oxide semiconductor(CMOS)has been the technological driver for the wireless revolution[1],enabling the full system-on-chip(SoC)integration of Bluetooth radios,60 GHz radios,and 79 GHz *** fact,the CMOS is now the dominant semiconductor technology for the fifth generation(5G)New Radio(NR)[2].

关键词： Bluetooth wireless complementary

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木棉树形结构和叶性状对生境要素的响应研究

广西植物 2024年第5期44卷 863-872页

作者：毛开泽高漫娟吴睿张月萍程希平西南林业大学地理与生态旅游学院昆明650224 国家林业和草原局西南生态文明研究中心昆明650224

植物形态结构是植物本身与外部环境共同作用的结果。为了分析木棉树形结构与叶性状的相关关系,探索地形、土壤和气象要素对木棉生长的影响,以及揭示木棉的生长策略和适应机制,该文以云南省西双版纳国家级自然保护区内230棵木棉为研究对... 详细信息

植物形态结构是植物本身与外部环境共同作用的结果。为了分析木棉树形结构与叶性状的相关关系,探索地形、土壤和气象要素对木棉生长的影响,以及揭示木棉的生长策略和适应机制,该文以云南省西双版纳国家级自然保护区内230棵木棉为研究对象,测定6个树形结构指标,8个叶性状指标以及所在区域地形、气象、土壤养分等生境要素,使用结构方程模型和变差分解分析各生境要素对木棉树形结构和叶性状的影响和解释度。结果表明:(1)木棉树形结构各观测指标之间、叶性状各观测指标之间存在相关性(P气象要素>土壤要素。(4)3个生境要素叠加解释了树形结构和叶性状分别为43.5%和12.3%,表现出树形结构对生境环境的响应大于叶性状对环境响应的特点。研究结果初步探明了木棉不同生长指标对环境要素的适应策略,为木棉在异质生境的培育、繁殖以及木棉人工林高效经营等提供了理论依据和实践参考。

关键词：木棉生境要素树形结构叶性状冗余分析结构方程模型

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不同生境下木棉幼苗叶性状和光合特性研究

西部林业科学 2024年第2期53卷 64-71页

作者：张月萍张梦婷李敏瑄代鹏跃李润泽王妍方西南林业大学地理与生态旅游学院云南昆明650224

植物的叶性状和光合特性会调整权衡分配机制以适应异质生境。以云南勐腊、元江两地的2 a生木棉幼苗为研究对象,实地测定叶面积、叶宽、叶鲜重、叶片含水量等10个叶功能性状和净光合速率、蒸腾速率、气孔导度等6个光合参数,分析其在不同... 详细信息

植物的叶性状和光合特性会调整权衡分配机制以适应异质生境。以云南勐腊、元江两地的2 a生木棉幼苗为研究对象,实地测定叶面积、叶宽、叶鲜重、叶片含水量等10个叶功能性状和净光合速率、蒸腾速率、气孔导度等6个光合参数,分析其在不同生境下的差异和相互关系,探讨光合特性对叶性状的响应。结果显示:不同生境下的木棉幼苗叶性状和光合特性之间存在差异(P<0.05),并具有显著相关性(P<0.05,P<0.01);叶性状各观测指标对木棉光合特性具有较强影响,其中叶宽、叶鲜重、比叶面积和饱和重对木棉幼苗光合指标的解释率较高,是影响木棉幼苗光合特性的主要叶性状指标。结果表明,在不同生境下植物叶性状与光合特性的差异性与响应关系显示了植物在应对环境变化下不同的生存策略。

关键词：木棉叶性状生境幼苗光合特性

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Gastric vagal afferent inputs reach the glycemia-sensitive neurons of lateral hypothalamic area in the rat

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Chinese Science Bulletin 2003年第6期48卷 577-581页

作者： zhang yueping ZHU Jingning JIANG Jianming WANG Jianjun Department of Biological Science and Technology Nanjing UniversityNanjing 210093China

The glycemia-sensitive neuron in lateral hypothalamic area (LHA) is one of the important central neural events involved in the feeding control. Electrophysio-logical studies have demonstrated that gastrointestinal vagal afferent inputs could convey the meal-related information of gastrointestinal tract to the hypothalamus. In this study, we examined whether the gastric vagal afferent inputs could reach the glycemia-sensitive neurons of the LHA by using in vivo extracellular recording technique in the rat. The results showed that stimulation of gastric vagal nerves elicited two types of the LHA neurons responses: the phasic response (93/116, 80.2%) and the change in cells firing pattern (23/116, 19.8%). Within the 93 cells that responded to the gastric vagal stimulation with a phasic response, 67 (72.0%) showed an inhibition in the cells firing rate, 26 (27.4%) were excited. Of the 23 cells that showed a change in the firing pattern, 13 responded to the gastric vagal stimulation with a long-lasting increase or decrease in firing rate, the remaining 10 cells turned their discrete spiking to the burst discharging. In addition, of 101 LHA neurons including the two types of responsive neurons, 73 (72.3%) were identified to be glyce-mia-sensitive neurons. These results demonstrated that the gastric vagal afferent inputs could reach the LHA and pre-dominantly reach those glycemia-sensitive neurons in the LHA. Presumably, the modulation of glycemia-sensitive neurons of LHA by the gastric vagal afferent inputs may play an important role in the short-term regulation of feed-ing behavior.

关键词：大鼠下丘脑外侧区胃迷走神经传入纤维摄食调节血糖感受神经元

Differential Antennas: Fundamentals and Applications

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Electromagnetic Science 2023年第1期1卷 1-17页

作者： yueping zhang Nanyang Technological University 639698Singapore

Driven by the great demand for highly integrated wireless system-on-chip and system-in-package devices,there has recently been increas-ing interest in the research and development of differential *** studies on the design,analysis,and measurement of differential antennas have been *** paper presents an overview of the fundamentals and applications of differential ***,it compares differential to bal-anced and single-ended to unbalanced antennas and explains why the new terms(differential and single-ended antennas)should be adopted instead of the old terms(balanced and unbalanced antennas).Second,it addresses the quantitative relationship between a differential antenna and its single-ended counterpart,which is important and useful because the properties of either the differential or single-ended antenna can be determined from the other with a known ***,it describes how differential antennas can be measured,with a special emphasis on the balun ***,it classifies dif-ferential antennas into wire,slot,microstrip,printed,and dielectric resonator antennas to better present their suitability and ***,it pro-vides application examples of differential antennas from simple discrete wire to sophisticated microstrip ***,it is argued that the old paradigms of lower gains and bulkier sizes of differential antennas as compared to single-ended antennas do not always hold true;for instance,differen-tial microstrip patch antennas can possess comparable or even smaller sizes and higher gain values than single-ended microstrip patch antennas.

关键词： Differential antennas Single-ended antennas Balanced antennas Unbalanced antennas Antenna-in-package Antenna-on-chip

Dynamic-based model for calculating the boulder impact force in debris flow

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Journal of Mountain Science 2024年第6期21卷 1930-1940页

作者： YANG Chaoping zhang Shaojie YIN yueping YANG Hongjuan WEI Fangqiang State Key Laboratory of Mountain Hazards and Engineering Resilience Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610299China University of Chinese Academy of Sciences Beijing 100049China China Institute of Geological Environment Monitoring Beijing 100081China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China Chongqing School University of Chinese Academy of SciencesChongqing 400714China

The boulder impact force in debris flow is generally calculated by static methods such as the cantilever beam ***,these methods cannot describe the dynamic scenario of boulder collision on structures,so the inertia and damping effects of the structures are not involved causing an overestimation on the boulder impact *** order to address this issue,a dynamic-based model for calculating the boulder impact force of a debris flow was proposed in this study,and the dynamic characteristics of a cantilever beam with multiple degrees of freedom under boulder collision were *** using the drop-weight method to simulate boulders within debris flow,seven experiments of drop-weight impacting the cantilever beam were used to calibrate the error of the dynamicbased *** indicate that the dynamic-based model is able to reconstruct the impact force history on the cantilever beam during impact time and the error of dynamic-based model is 15.3%in calculating boulder impact force,significantly outperforming the cantilever beam model’s error of 285%.Therefore,the dynamic-based model can overcome the drawbacks of the static-based models and provide a more reliable theoretical foundation for the engineering design of debris flow control structures.

关键词： Debris flow Impact force Boulder collision Dynamic-based model Engineering design

Centrifuge modeling of unreinforced and multi-row stabilizing piles reinforced landslides subjected to reservoir water level fluctuation

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1600-1614页

作者： Chenyang zhang yueping Yin Hui Yan Sainan Zhu Ming zhang Luqi Wang Department of Civil Engineering The University of Hong KongHong KongChina China Institute of Geo-environment Monitoring BeijingChina Chongqing 107 Municipal Construction Engineering Co. Ltd.ChongqingChina Faculty of Engineering China University of GeosciencesWuhanChina School of Civil Engineering Chongqing UniversityChongqingChina

With the construction of the Three Gorges Reservoir dam,frequent reservoir landslide events have been *** recent years,multi-row stabilizing piles(MRSPs)have been used to stabilize massive reservoir landslides in *** this study,two centrifuge model tests were carried out to study the unreinforced and MRSP-reinforced slopes subjected to reservoir water level(RWL)operation,using the Taping landslide as a *** results indicate that the RWL rising can provide lateral support within the submerged zone and then produce the inward seepage force,eventually strengthening the slope ***,a rapid RWL drawdown may induce outward seepage forces and a sudden debuttressing effect,consequently reducing the effective soil normal stress and triggering partial pre-failure within the RWL fluctuation ***,partial deformation and subsequent soil structure damage generate excess pore water pressures,ultimately leading to the overall failure of the reservoir *** study also reveals that a rapid increase in the downslope driving force due to RWL drawdown significantly intensifies the lateral earth pressures exerted on the ***,the MRSPs possess a considerable reinforcement effect on the reservoir landslide,transforming the overall failure into a partial deformation and failure situated above and in front of the *** mechanical transfer behavior observed in the MRSPs demonstrates a progressive alteration in relation to RWL *** the RWL rises,the mechanical states among MRSPs exhibit a growing *** shear force transfer factor(*** ratio of shear forces on pile of the n th row to that of the first row)increases significantly with the RWL *** indicates that the mechanical states among MRSPs tend toward an enhanced *** insights gained from this study contribute to a more comprehensive understanding of the failure mechanisms of reservoir landslides and the mechanical behavior of M

关键词： Reservoir landslide Failure mechanism Multi-row stabilizing piles Mechanical behavior

Modification of acidity of Mo-Fe/HZSM-5 zeolite via argon plasma treatment

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Frontiers of Chemical Science and Engineering 2008年第1期2卷 55-58页

作者： Xinli ZHU Kailu YU Dangguo CHENG yueping zhang Qing XIA Changjun LIU Key Laboratory for Green Chemical Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Department of Chemistry Tianjin UniversityTianjin 300072China

TheNH_(3)-TPDcharacterization wasconducted to confirm that the acidity of Mo-Fe/HZSM-5 zeolite could be selectively modified via the glow discharge plasma *** plasma catalyst treatment could totally change the distribution of aromatic products with higher methane conversion compared to the untreated *** polycyclic aromatics such as anthracene,pyrene and phenanthrene were also produced over the plasma treated catalyst,in addition to benzene,toluene and naphthalene,which were normally obtained over the untreated catalyst.

关键词： methane aromatization plasma acidity Mo-Fe/HZSM-5 zeolite

Differential Quasi-Yagi Antenna and Array

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中兴通讯技术:英文版 2023年第3期21卷 37-44页

作者： ZHU Zhihao zhang yueping Key Laboratory of Ministry of Education of Design and Electromag-netic Compatibility of High-Speed Electronic Systems Shanghai Jiao Tong UniversityShanghai 200240China Nanyang Technological University Singapore 639798Singapore

A novel differential quasi-Yagi antenna is first presented and compared with a normal single-ended *** simulated and measured results show that the differential quasi-Yagi antenna outperforms the conventional single-ended *** differential quasi-Yagi antenna is then used as an element for linear arrays.A study of the coupling mechanism between the two differential and the two singleended quasi-Yagi antennas is conducted,which reveals that the TE0 mode is the dominant mode,and the driver is the decisive part to account for the mutual ***,the effects of four decoupling structures are respectively evaluated between the two differential quasi-Yagi ***,the arrays with simple but effective decoupling structures are fabricated and *** measured results demonstrate that the simple slit or air-hole decoupling structure can reduce the coupling level from−18 dB to−25 dB and meanwhile maintain the impedance matching and radiation patterns of the array over the broad *** differential quasi-Yagi antenna should be a promising antenna candidate for many applications.

关键词： differential quasi-Yagi antenna and array mutual coupling surface wave