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Journal of Environmental Sciences 2024年第5期139卷 281-292页

作者： Rongli Tan Ke Li Yue Sun xiaoliang fan Zhengtao Shen Lingyi Tang School of Environment Nanjing UniversityNanjing 210023China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023China School of Earth and Engineering Sciences Nanjing UniversityNanjing 210023China Department of Earth and Atmospheric Sciences University of AlbertaEdmonton T6G 2E3Canada

Realizing campus sustainability requires the environmental-friendly and economical treatment of tremendous fallen *** fallen leaf biochar at a low temperature is a candidate *** this study,six common types of fallen leaves on the campus were pyrolyzed at 300℃.The obtained biochars were characterized and the adsorption mechanisms of lead(Pb)by the fallen leaf biochars were *** adsorption capacity of leaf biochar for Pb was relatively high,up to 209 mg/g(Yulania denudata leaf biochar).Adsorption of Pb onto active sites was the rate-limiting step for most leaf *** for Platanus leaf biochar,intraparticle diffusion of Pb^(2+)dominated owing to the lowest adsorption ***,the highest exchangeable Pb fraction(27%)indicated its potential for removing aqueous Pb^(2+).Ginkgo and Prunus cerasifera leaf biochar immobilized Pb by surface complexation and precipitation as lead ***,they were suitable for soil heavy metal *** study shed the light on the sustainable utilization of campus fallen leaves and the application of fallen leaf biochars in heavy metal remediation.

关键词： Fallen leaves Waste management Biochar Lead removal Sorption Circular campus

Understanding urban structures and crowd dynamics leveraging large-scale vehicle mobility data

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Frontiers of Computer Science 2020年第5期14卷 77-88页

作者： Zhihan Jiang Yan Liu xiaoliang fan Cheng Wang Jonathan Li Longbiao Chen Fujian Key Laboratory of Sensing and Computing for Smart Cities School of Information Science and EngineeringXiamen UniversityXiamen361005China

A comprehensive understanding of city structures and urban dynamics can greatly improve the efficiency and quality of urban planning and management,while the traditional approaches of which,such as manual surveys,usually incur substantial labor and *** this paper,we propose a data-driven framework to sense urban structures and dynamics from large-scale vehicle mobility ***,we divide the city into fine-grained grids,and cluster the grids with similar mobility features into structured urban areas with a proposed distance-constrained clustering algorithm(DCCA).Second,we detect irregular mobility traffic patterns in each area leveraging an ARIMA-based anomaly detection algorithm(ADAM),and correlate them to the urban social and emergency ***,we build a visualization system to demonstrate the urban structures and crowd *** evaluate our framework using real-world datasets collected from Xiamen city,China,and the results show that the proposed framework can sense urban structures and crowd comprehensively and effectively.

关键词： vehicle mobility big data spatial clustering event detection urban computing ubiquitous computing

Influence of graphite on concentration of carbon vacancies in ball-milled TiC_x

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China Foundry 2011年第4期8卷 392-396页

作者： Ding Haimin fan xiaoliang Chu Kalyu Liu Xiangfa Nie Jinfeng Department of Mechanical Engineering North China Electric Power University Baoding 071003 China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Jinan 250061 China

In this work, the influence of graphite on the ball-milled TiC, was studied. The results show that the lattice parameter of TiC, is increased when TiC, particles are ball-milled with graphite, which indicates a decrease in the concentration of carbon vacancies in the TIC,. It is considered that this decrease in the concentration of carbon vacancies results from the diffusion of carbon atoms from graphite into the TiCx. When the TiCx is ball-milled with more graphite, the effectiveness of the ball-milling is better, and the diffusion process of carbon becomes much easier. Furthermore, besides diffusion into the TiCx, some graphite has transformed into amorphous carbon after the ball-milling.

关键词： TiC graphite ball-milling microstructure

Solvent-free carbon sphere nanofluids towards intelligent lubrication regulation

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Friction 2024年第1期12卷 95-109页

作者： Sheng ZHANG Wen LI xiaoliang MA Xiaoqiang fan Minhao ZHU Tribology Research Institute School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China

By simply switching the electrical circuit installed on steel/steel contact,the tribological behaviors of nanofluids(NFs)can be regulated in real time,thereby achieving the desired performance of friction reduction and wear ***,solvent-free carbon spherical nanofluids(C-NFs)were successfully prepared for intelligent lubrication regulation.C-NFs with excellent lubrication performance can immediately reduce the coefficient of friction(COF)despite applying a weak electric potential(1.5 V).Moreover,polyethylene glycol 400(PEG400)containing 5.0 wt%C-NFs remained responsive to electrical stimulation under the intermittent voltage application with an average coefficient of friction(ACOF)reduction of 20.8%over *** intelligent lubrication regulation of C-NFs under an external electric field(EEF)mainly depends on the orderly arranged double-electric adsorption film of ion canopy-adsorbed carbon spheres(CSs).The intermittent electrical application can continuously reinforce the adsorption film and its durability for real-time controlling the sliding ***-stimulation-responsive intelligent lubricants provide a new technical support for realizing intelligent stepless control of devices.

关键词： solvent-free carbon spherical nanofluids(C-NFs) intelligent lubrication regulation lubrication performance adsorption film

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基于模型预测的巷道机器人轨迹跟踪算法研究

信息技术与信息化 2024年第1期 13-16页

作者：石征锦张野武晨卜春光范晓亮沈阳理工大学自动化与电气工程学院辽宁沈阳110159 中国科学院沈阳自动化研究所机器人学国家重点实验室辽宁沈阳110016 中国科学院机器人与智能制造创新研究院辽宁沈阳110016

为了解决巷道机器人高精度轨迹跟踪控制问题,提出了一种基于模型预测控制的高精度轨迹跟踪控制算法。首先,根据巷道机器人的运动学特性,建立了运动学模型;其次,基于跟踪精度和机器人的物理特性设计轨迹跟踪优化目标函数,并根据巷道机器... 详细信息

为了解决巷道机器人高精度轨迹跟踪控制问题,提出了一种基于模型预测控制的高精度轨迹跟踪控制算法。首先,根据巷道机器人的运动学特性,建立了运动学模型;其次,基于跟踪精度和机器人的物理特性设计轨迹跟踪优化目标函数,并根据巷道机器人的物理限制和巷道环境特点需要设定轨迹跟踪控制器的边界条件;然后,选择用二次规划完成优化计算,并依托机器人本体的里程计反馈信息,完成巷道机器人轨迹跟踪控制;最后使用turtlebot3型机器人进行了实物实验,并且与基于反步法的轨迹跟踪进行了对比,结果表明所提出的方法具有更好的轨迹跟踪精度和鲁棒性。

关键词：巷道机器人轨迹跟踪 MPC 反步法二次规划

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基于深度学习的实时同步定位与建图算法研究

信息技术与信息化 2024年第1期 207-211页

作者：石征锦王晟霖武晨卜春光范晓亮沈阳理工大学自动化与电气工程学院辽宁沈阳110159 中国科学院沈阳自动化研究所机器人学国家重点实验室辽宁沈阳110016 中国科学院机器人与智能制造创新研究院辽宁沈阳110016

传统的视觉同步定位与建图(simultaneous localization and mapping,SLAM)算法大多数建立在假设场景是静态的基础之上,这种假设限制了视觉SLAM在现实场景的应用。针对传统SLAM算法在动态环境下定位精度低、鲁棒性差的问题,提出了一种实... 详细信息

传统的视觉同步定位与建图(simultaneous localization and mapping,SLAM)算法大多数建立在假设场景是静态的基础之上,这种假设限制了视觉SLAM在现实场景的应用。针对传统SLAM算法在动态环境下定位精度低、鲁棒性差的问题,提出了一种实时动态视觉SLAM算法。首先所提出的算法以ORBSLAM3为基础,新增了一个语义线程,该线程与其他线程并行运行,可以避免语义线程运行较慢而影响跟踪线程的运行。然后使用移动概率更新和传播语义信息,将其保存在地图中,并且使用数据关联算法从跟踪中去除动态点。最后使用公共TUM数据集来评估,证明了所提出的算法在动态环境下的鲁棒性和实时性优于现有的算法。

关键词：视觉同步定位与建图动态环境语义分割实时性

All-optical suppression on the impact of Sun outage in laser satellite communication systems by using a nonlinear semiconductor optical amplifier

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Chinese Optics Letters 2024年第2期22卷 76-80页

作者：李晓亮刘荣科范峰 School of Electronics and Information Engineering Beihang UniversityBeijing 100191China Beijing Research Institute of Telemetry Beijing 100094China

We introduce an all-optical approach,optical parametric amplification(OPA)processor to suppress the impact of Sun outage in laser satellite communication systems,which is implemented by only one nonlinear semiconductor optical amplifier driven by both electrical and optical *** optimized OPA processor,with a current of 539 mA and a pump-to-signal ratio of 16 dB,could significantly improve the signal quality by 3.5 dB in experiments for the elevation angle of Sun radiation of 0 *** signal quality improvement is observed in the whole range of the elevation angle,confirming the effectiveness of the proposed OPA processor in the field of Sun radiation mitigation.

关键词： nonlinear optics Sun outage laser satellite communication

论我国消费损害赔偿特别代表人诉讼机制的构建

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法学 2022年第12期 108-122页

作者：范晓亮安徽大学法学院

基于消费争议的单位数额小、总体数额大、人数不确定和扩散性等特点,消费者的个体损害赔偿与整体权益保护往往难以截然分开,损害赔偿争议不易通过单独诉讼解决,代表人诉讼成为主要方式。但我国《民事诉讼法》规定的普通代表人诉讼的实... 详细信息

基于消费争议的单位数额小、总体数额大、人数不确定和扩散性等特点,消费者的个体损害赔偿与整体权益保护往往难以截然分开,损害赔偿争议不易通过单独诉讼解决,代表人诉讼成为主要方式。但我国《民事诉讼法》规定的普通代表人诉讼的实际效果有限,而《证券法》规定的证券特别代表人诉讼的有效经验值得推广,美国法上的集团诉讼和欧盟法上的代表人诉讼也可资借鉴。我国相关立法为省级以上消费者协会代表消费者提起损害赔偿诉讼留下了空间。消费者协会具有保护消费者权益的法定职权,在得到符合法定人数消费者的授权后,应被视为满足了代表人与实体法律关系的适当限度联系,因而可基于代理型任意诉讼担当理论提起损害赔偿特别代表人诉讼。在此基础上,通过默示加入制凝聚诉讼请求,有利于实现特别代表人诉讼的损害赔偿目标和诉讼效率,并可产生显著的外部性以保护消费者整体权益,实现公益效果,但作为程序正当性依据的诉权保障须予明确。

关键词：代表人诉讼特别代表人诉讼任意诉讼担当消费争议损害赔偿

基于近红外光谱技术对山茱萸炮制程度的质量评价

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中国现代应用药学 2019年第11期36卷 1352-1357页

作者：范晓良张纯阮伟峰浙江中医药大学附属嘉兴中医院浙江嘉兴314001 嘉兴市食品药品检验检测院浙江嘉兴314001

目的采用近红外光谱技术建立山茱萸饮片中5-羟甲基糠醛含量的快速无损检测方法,并用于快速判别山茱萸饮片的炮制程度。方法以54个样本作为校正集,运用偏最小二乘法建立定量校正模型并进行优化。以9个样本作为验证集,进行含量预测。结果... 详细信息

目的采用近红外光谱技术建立山茱萸饮片中5-羟甲基糠醛含量的快速无损检测方法,并用于快速判别山茱萸饮片的炮制程度。方法以54个样本作为校正集,运用偏最小二乘法建立定量校正模型并进行优化。以9个样本作为验证集,进行含量预测。结果校正模型决定系数为0.925 6,相对分析误差为5.06,交叉验证均方根误差为0.022 0,外部验证均方差为0.019 3,光谱预测值与真值之间的相关性较好。结论该法可直接用于中药山茱萸中5-羟甲基糠醛含量的快速预测,为快速判断山茱萸炮制程度提供可能。该方法具有操作简便、快速无损、准确可靠等优点。

关键词：近红外光谱法山茱萸 5-羟甲基糠醛炮制程度质量评价

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冗余式捷联惯导系统多故障的检测与隔离

哈尔滨工程大学学报 2018年第2期39卷 358-364页

作者：程建华孙湘钰牟宏杰范晓亮哈尔滨工程大学自动化学院黑龙江哈尔滨150001

针对传统广义似然比故障检测无法实现捷联惯导多陀螺故障检测和隔离的问题,本文提出基于广义似然比故障检测和线性估计思想相结合的多故障检测与隔离方法。以发生多故障的六陀螺椎体垂向对称配置的冗余捷联惯导为对象,采用广义似然比方... 详细信息

针对传统广义似然比故障检测无法实现捷联惯导多陀螺故障检测和隔离的问题,本文提出基于广义似然比故障检测和线性估计思想相结合的多故障检测与隔离方法。以发生多故障的六陀螺椎体垂向对称配置的冗余捷联惯导为对象,采用广义似然比方法对系统进行故障检测,并引入线性估计思想实现陀螺输出值预测,通过陀螺预测值与输出值的残差比较定位故障陀螺,并记录故障信息,实现系统重构。通过仿真和实测数据验证,证明该方法可以准确实现对多陀螺故障检测与隔离,保障捷联惯导系统可靠性。

关键词：捷联惯导故障检测与隔离多故障广义似然比线性估计残差可靠性重构