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LoS sensing-based superimposed CSI feedback for UAV-assisted mmWave systems

Chinese Journal of Aeronautics 2023年第12期36卷 349-360页

作者： Chaojin QING Qing YE Wenhui LIU Zilong WANG Jiafan WANG jinliang chen School of Electrical Engineering and Electronic Information Xihua UniversityChengdu 610039China School of Aeronautics and Astronautics Xihua UniversityChengdu 610039China

In Unmanned Aerial Vehicle(UAV)-assisted millimeter Wave(mmWave)systems,Channel State Information(CSI)feedback is critical for the selection of modulation schemes,resource management,beamforming,***,traditional CSI feedback methods lead to significant feedback overhead and energy consumption of the UAV transmitter,therefore shortening the system operation *** tackle these issues,inspired by superimposed feedback and Integrated Sensing and Communications(ISAC),a Line of Sight(LoS)sensing-based superimposed CSI feedback scheme is ***,on the UAV transmitter side,the Ground-to-UAV(G2U)CSI is superimposed on the UAV-to-Ground(U2G)data to feed back to the ground Base Station(gBS).At the gBS,the dedicated LoS Sensing Network(LoS-SenNet)is designed to sense the U2G CSI in LoS and NLoS *** the sensed result of LoS-SenNet,the determined G2U CSI from the initial feature extraction will work as the priori information to guide the subsequent ***,for the G2U CSI in NLoS,a CSI Recovery Network(CSI-RecNet)and superimposed interference cancellation are developed to recover the G2U CSI and U2G *** for the LoS scenario,a dedicated LoS Aid Network(LoS-Aid Net)is embedded before the CSI-RecNet and the block of superimposed interference cancellation to highlight the feature of the G2U *** with other methods of superimposed CSI feedback,simulation results demonstrate that the proposed feedback scheme effectively improves the recovery accuracy of the G2U CSI and U2G ***,against parameter variations,the proposed feedback scheme presents its robustness.

关键词： Channel State Information(CSI) Integrated Sensing and Communications(ISAC) Line of Sight(LoS)sensing Superimposed CSI feedback Unmanned Aerial Vehicle(UAV)-assisted millimeter Wave(mmWave)systems

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Integrated model simulates bigger, sweeter tomatoes under changing climate under reduced nitrogen and water input

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Horticulture Research 2023年第5期10卷 61-71页

作者： Huiping Zhou Shaozhong Kang Michel Génard Gilles Vercambre jinliang chen Center for Agricultural Water Research in China China Agricultural UniversityBeijing 100083China National Field Scientific Observation and Research Station on Efficient Water Use of Oasis Agriculture in Wuwei of Gansu Province Wuwei 733009China INRAE UR 1115 Plantes et Systèmes de Culture HorticolesAvignon Cedex 9 F-84914France

When simulating the response of fruit growth and quality to environmental factors and cultivation practices,the interactions between the mother plant and fruit need to be considered as a whole ***,we developed the integrative Tomato plant and fruit Growth and Fruit Sugar metabolism(TGFS)model by coupling equations describing the biophysical processes of leaf gas exchange,water transport,carbon allocation,organ growth and fruit sugar *** model also accounts for effects of soil nitrogen and atmospheric CO_(2) concentration on gaseous exchange of water and carbon by the *** different nitrogen and water input values,TGFS performed well at simulating the dry mass of the tomato leaf,stem,root,and fruit,and the concentrations of soluble sugar and starch in *** simulations showed that increasing air temperature and CO_(2) concentration has positive effects on fruit growth,but not on sugar *** model-based analyses of cultivation scenarios suggest that,in the context of climate change,decreasing N by 15%–25%and decreasing irrigation by 10%–20%relative to current levels would increase tomato fresh weight by 27.8%–36.4% while increasing soluble sugar concentration by up to 10%.TGFS provides a promising tool to optimise N and water inputs for sustainable high-quality tomatoes.

关键词： soil sugar metabolism

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Pseudomonas mendocina LYX:A novel aerobic bacterium with advantage of removing nitrate high effectively by assimilation and dissimilation simultaneously

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 131-140页

作者： Yuxin Li Jiayin Ling Pengcheng chen jinliang chen Ruizhi Dai Jinsong Liao Jiejing Yu Yanbin Xu School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou510006China Guangdong Yikangsheng Environmental Protection Science and Technology Company Yunfu527300China Analysis and Test Center Guangdong University of TechnologyGuangzhou510006China

The problem of nitrate accumulation in aerobic tank and total nitrogen excessive discharge in effluent was very common in traditional livestock and poultry farming wastewater treatment systems owing to the lengthy process flow and low process control level.A strain LYX of aerobic bacterium was isolated from the activated sludge of a wastewater treatment system in a pig farm,which could remove nitrate effectively in aerobic tank and was identified Pseudomonas mendocina by 16S rRNA *** the condition of nitrate as the sole nitrogen source,this strain removed over 90%of NO_(3)^(−)-N with an initial concentration of 110 mg/L under aerobic conditions within 48 *** them,37.9%of NO_(3)^(−)-N was assimilated into Bio-N,about 51.9%was reduced to gaseous nitrogen and less than 0.5%of nitrogen was replaced by NO_(3)^(−)-N and NH_(4)^(+)-N,9.7%NO_(3)^(−)-N remained in the effluent at the *** the same time,four key genes(napA,nirK,norB and nosZ)related to nitrate nitrogen removal were expressed during the denitrification process of *** LYX,in which the transcription level of the indicator genes of this aerobic denitrifying bacterium(napA)was the *** addition,it was found with the 15N tracer technique that inoculation of this strain on sludge increased the amount of nitrogen loss from 9.26 nmol N/(g·h)to 23.835 nmol N/(g·h).Therefore,*** LYX is a potential bioagent for advanced nitrogen removal by assimilating and reducing nitrate simultaneously in aerobic tanks.

关键词： Pseudomonas mendocina Aerobic nitrate removal ^(15)N tracing technique Denitrification assimilatively and disimilatively Aerobic denitrifying genes

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Path Planning and Optimization of Humanoid Manipulator in Cartesian Space

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Journal of Shanghai Jiaotong university(Science) 2022年第5期27卷 614-620页

作者： LI Shiqi LI Xiao KE Han XIONG Youjun XIE Zheng chen jinliang School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan430074China Ubtech Robotics Co. Ltd.Shenzhen518000GuangdongChina

To solve the problems of low efficiency and multi-solvability of humanoid manipulator Cartesian space path planning in physical human-robot interaction,an improved bi-directional rapidly-exploring random tree algorithm based on greedy growth strategy in 3D space is *** workspace of manipulator established based on Monte Carlo method is used as the sampling space of the rapidly-exploring random tree,and the opposite expanding greedy growth strategy is added in the random tree expansion process to improve the path planning *** the generated path is reversely optimized to shorten the length of the planned path,and the optimized path is interpolated and pose searched in Cartesian space to form a collision-free optimized path suitable for humanoid manipulator ***,the validity and reliability of the algorithm are verified in an intelligent elderly care service scenario based on Walker2,a large humanoid service robot.

关键词： humanoid manipulator path planning rapidly-exploring random tree greedy growth reverse optimization pose search

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移动医疗服务用户健康信息披露意愿研究——基于fsQCA和NCA的实证分析

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现代情报 2023年第2期43卷 65-74页

作者：胡小飞陈进亮南昌大学公共政策与管理学院江西南昌330031

[目的/意义]移动医疗服务的健康信息具有隐私和敏感等特征,用户健康信息披露行为日益受到学界和公众的关注。[方法/过程]本研究基于精细加工可能性模型,利用必要条件分析和模糊集定性比较分析的方法对问卷数据进行实证研究,探究影响健... 详细信息

[目的/意义]移动医疗服务的健康信息具有隐私和敏感等特征,用户健康信息披露行为日益受到学界和公众的关注。[方法/过程]本研究基于精细加工可能性模型,利用必要条件分析和模糊集定性比较分析的方法对问卷数据进行实证研究,探究影响健康信息披露意愿的必要条件及不同因素组合产生的组态路径。[结果/结论]研究发现,信任是影响用户健康信息披露意愿的必要条件,存在3条影响用户健康信息披露意愿的路径:路径一为风险消解型,当用户感知风险被消解时,即使需要披露的信息敏感性高,用户也会具有很高的披露意愿;路径二为权衡利弊型,当用户预期收益大于预期风险时,其信息披露意愿会随之增强;路径三为利益驱动型,当用户隐私关注水平较低时,其健康信息披露意愿主要受感知收益驱动。

关键词：移动医疗服务用户健康信息披露意愿精细加工可能性模型模糊集定性比较分析

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“大推进”工业化理论及其可行性研究

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商业时代 2010年第24期 117-118页

作者：陈金良肇庆学院广东肇庆526061

文章根据结构主义经济学和新兴古典经济学的"大推进"工业化理论,分析了该理论在各国工业化中的应用历程,指出"大推进"模式在社会主义市场经济条件下具有广阔的发展空间,不同国家或区域应结合自身的经济发展条件,采取相应的"大推进"模式... 详细信息

文章根据结构主义经济学和新兴古典经济学的"大推进"工业化理论,分析了该理论在各国工业化中的应用历程,指出"大推进"模式在社会主义市场经济条件下具有广阔的发展空间,不同国家或区域应结合自身的经济发展条件,采取相应的"大推进"模式,以加速工业化进程。

关键词： “大推进”工业化市场诱导型模式政府组织型模式计划主导型模式可行性

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填充金属及电流对0Cr18Ni9/Q235异种焊接接头组织及性能的影响

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钢铁钒钛 2019年第5期40卷 157-161页

作者：陈今良潘登攀枝花学院钒钛学院

采用TIG焊接工艺,分别选用直径为2.0 mm的ER309、Ni317焊丝及90~120 A电流,对0Cr18Ni9奥氏体不锈钢和Q235碳钢进行双面焊,研究了焊接接头的金相组织、拉伸性能和显微硬度。结果表明:同种焊丝,在90~120 A焊接电流条件下,随着电流增大,抗... 详细信息

采用TIG焊接工艺,分别选用直径为2.0 mm的ER309、Ni317焊丝及90~120 A电流,对0Cr18Ni9奥氏体不锈钢和Q235碳钢进行双面焊,研究了焊接接头的金相组织、拉伸性能和显微硬度。结果表明:同种焊丝,在90~120 A焊接电流条件下,随着电流增大,抗拉强度增大,拉伸断口均出现韧窝,为韧性断裂;采用ER309焊丝的接头拉伸性能要优于Ni317焊丝接头;两种焊丝焊接,电流值都为110 A时接头硬度最佳。

关键词：不锈钢异种焊接硬度组织形貌

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基于差异化的奢侈品营销策略分析

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商业时代 2010年第25期 33-34页

作者：陈金良贵州大学管理学院贵阳550025

本文介绍了奢侈品的概念和特征,并对奢侈品市场的消费群体及消费动机进行了分析,最后从产品、服务、形象、促销等方面提出了差异化的奢侈品营销策略。

关键词：差异化奢侈品营销策略

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Modeling and control of a rigid-flexible coupling robot for narrow space manipulations

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Science China Technological Sciences 2025年

作者： Kuangda chen Huan ZHAO Jiexin ZHANG Mei FENG Yiwei WANG jinliang WANG Han DING State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and Technology Key Laboratory of CNC Equipment Reliability Ministry of Education Jilin University School of Medical Equipment Science and Engineering Huazhong University of Science and Technology

Narrow space manipulations are crucial for equipment maintenance, as they eliminate the need for disassembly, thus reducing costs and increasing efficiency. Cable-driven flexible robots possess exceptional capabilities in maneuvering through narrow spaces, thanks to their interaction compliance and distal dexterity. However, their inherent low stiffness causes a decline in the location accuracy of the robot and could even lead to manipulation failure. To address this challenge, this paper proposes a novel type of rigid-flexible coupling robot, which increases the stiffness of the robot while ensuring the reachability within a narrow space. To achieve high-accuracy location in a narrow space, kinematic and control methods are proposed. Specifically,the robot forward kinematics are uniformly represented, and the closed-form inverse kinematics solution is derived. Furthermore, in cases where the robot?s structure fails to align with Pieper?s solution, a two-stage search strategy is utilized to solve the inverse kinematics, resulting in a high success rate of 99.1%. Based on the proposed kinematics, a rigid-dominated control method is then proposed to facilitate localization and pose alignment of target objects in narrow spaces. The practical comparative experiments show that the proposed robot has the capability of high accuracy control in narrow spaces.

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CrCoNi中熵合金变形中位错与孪晶协调变形机制

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材料导报 2022年第14期36卷 182-187页

作者：陈今良冯中学易健宏昆明理工大学材料科学与工程学院攀枝花学院钒钛学院

如何在提升材料强度的同时提升塑韧性一直是材料科学领域研究的热点之一，而这也是材料领域的重大科学难题和制约材料发展的重要瓶颈。CrCoNi中熵合金在室温与低温下都具有优异的强度和塑性，尤其在液氮温度下仍然具备高的塑性，因此备... 详细信息

如何在提升材料强度的同时提升塑韧性一直是材料科学领域研究的热点之一，而这也是材料领域的重大科学难题和制约材料发展的重要瓶颈。CrCoNi中熵合金在室温与低温下都具有优异的强度和塑性，尤其在液氮温度下仍然具备高的塑性，因此备受研究者的关注。传统金属在变形初期以位错滑移为主，随变形程度增加，从而诱发孪晶，以实现孪晶与位错协调变形。与传统金属不同，CrCoNi中熵合金由于具有极低的层错能，容易在变形过程中形成大量的层错、位错和孪晶。在变形中引入纳米孪晶细化晶粒，通过细晶强化实现强度和韧性的协调提升，且孪晶可以形成立体网络提升中熵合金的协调变形能力。此外，CrCoNi合金在变形过程中，位错与孪晶存在相互作用，位错塞积后引发孪晶，孪晶进而阻碍位错运动并同时增大位错密度，调整位错滑移通道，以促使位错交滑移。如此往复，CrCoNi合金的塑性变形更加均匀，从而使强度和韧性这一矛盾得以协调。为阐述CrCoNi中熵合金在变形中呈现的优异力学性能与纳米微观结构的关系，本文从CrCoNi中熵合金的变形机理出发，综述了CrCoNi合金变形过程中位错与孪晶的存在形态、运动方式、协调机制等，分析了CrCoNi合金在不同变形条件下位错与孪晶的相互作用及二者对变形的影响，论述了位错-孪晶协同强韧化主导机制，最后对未来中熵合金的研究进行了展望。

关键词：中熵合金位错孪晶协调变形强韧性机制

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