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观音阁水库水体中氮、磷污染现状及其防治对策

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辽宁城乡环境科技 2006年第4期26卷 13-15页

作者：孟凡青本溪满族自治县环保局本溪县117100

本文通过对观音阁水库的水质进行监测和调查分析,了解观音阁水库水体中氮、磷污染状况及来源。根据监测和调查结果可以判断,磷是观音阁水库中限制性营养盐。通过采取必要的防治对策和措施,控制氮、磷的浓度,不仅可以控制观音阁水库水体... 详细信息

本文通过对观音阁水库的水质进行监测和调查分析,了解观音阁水库水体中氮、磷污染状况及来源。根据监测和调查结果可以判断,磷是观音阁水库中限制性营养盐。通过采取必要的防治对策和措施,控制氮、磷的浓度,不仅可以控制观音阁水库水体富营养化程度,而且还能产生一定的经济效益。

关键词：氮磷富营养化水库

A vertical track nonlinear energy sink

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 931-946页

作者： meng LI Hu DING Shanghai Key Laboratory of Mechanics in Energy Engineering School of Mechanics and Engineering ScienceShanghai Frontier Science Center of MechanoinformaticsShanghai UniversityShanghai 200444China

Eliminating the effects of gravity and designing nonlinear energy sinks(NESs)that suppress vibration in the vertical direction is a challenging task with numerous damping *** this paper,the dynamic design of a vertical track nonlinear energy sink(VTNES)with zero linear stiffness in the vertical direction is proposed and realized for the first *** motion differential equations of the VTNES coupled with a linear oscillator(LO)are *** the strong nonlinearity considered of the VTNES,the steady-state response of the system is analyzed with the harmonic balance method(HBM),and the accuracy of the HBM is verified *** this basis,the VTNES prototype is manufactured,and its nonlinear stiffness is *** damping effect and dynamic characteristics of the VTNES are studied theoretically and *** results show that the VTNES has better damping effects when strong modulation responses(SMRs)***,even for small-amplitude vibration,the VTNES also has a good vibration suppression *** sum up,in order to suppress the vertical vibration,an NES is designed and developed,which can suppress the vertical vibration within certain ranges of the resonance frequency and the vibration intensity.

关键词： track nonlinear energy sink(TNES) vertical direction gravity nonlinear stiffness harmonic balance method(HBM) vibration control

Nested Saturated Control of Uncertain Complex Cascade Systems Using Mixed Saturation Levels

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1163-1174页

作者： meng Li Zhigang Zeng Wuhan National Laboratory for Optoelectronics Wuhan 430074 School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074 Key Laboratory of Image Processing and Intelligent Control of Education Ministry of China Wuhan 430074China

This study addresses the problem of global asymptotic stability for uncertain complex cascade systems composed of multiple integrator systems and non-strict feedforward nonlinear systems. To tackle the complexity inherent in such structures, a novel nested saturated control design is proposed that incorporates both constant saturation levels and state-dependent saturation levels. Specifically, a modified differentiable saturation function is proposed to facilitate the saturation reduction analysis of the uncertain complex cascade systems under the presence of mixed saturation levels. In addition, the design of modified differentiable saturation function will help to construct a hierarchical global convergence strategy to improve the robustness of control design scheme. Through calculation of relevant inequalities, time derivative of boundary surface and simple Lyapunov function,saturation reduction analysis and convergence analysis are carried out, and then a set of explicit parameter conditions are provided to ensure global asymptotic stability in the closed-loop systems. Finally, a simplified system of the mechanical model is presented to validate the effectiveness of the proposed method.

关键词： method saturation differentiable

Adaptive admittance tracking control for interactive robot with prescribed performance

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Journal of Systems Engineering and Electronics 2024年第2期35卷 444-450页

作者： meng Qingrui LIN Yan School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100190China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China

An adaptive control approach is presented in this paper for tracking desired trajectories in interactive manipulators. The controller design incorporates prescribed performance functions (PPFs) to improve dynamic performance. Notably, the performance of the output error is confined in an envelope characterized by exponential convergence, leading to convergence to zero. This feature ensures a prompt response from admittance control and establishes a reliable safety framework for interactions. Simulation results provide practical insights,demonstrating the viability of the control scheme proposed in this paper.

关键词： prescribed performance admittance control adaptive control robots

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我心中的杨讷老师

中国史研究动态 2020年第3期 40-42页

作者：孟繁清河北师范大学历史文化学院河北石家庄050024

杨讷老师逝世一年多了。因为消息闭塞,杨老师病重期间未能前去看望;逝世后,也没能送老师一程,留下了深深的遗憾。2019年11月份,在陈高华老师倡议下,学界朋友集聚一堂,共同缅怀杨老师的为人为学,是很有意义的。我和郭旃、王劲松两位学兄... 详细信息

杨讷老师逝世一年多了。因为消息闭塞,杨老师病重期间未能前去看望;逝世后,也没能送老师一程,留下了深深的遗憾。2019年11月份,在陈高华老师倡议下,学界朋友集聚一堂,共同缅怀杨老师的为人为学,是很有意义的。我和郭旃、王劲松两位学兄,是陈高华老师和杨讷老师共同培养的第一届研究生,也是杨老师唯一一届研究生,感到莫大的荣幸。杨老师尊敬师长,学术求真,对我的教诲和影响是深远的。

关键词：研究生共同培养杨讷老师王劲松

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儿童特发性间质性肺炎6例临床分析

中华儿科杂志 2022年第9期60卷 930-934页

作者：陈蒙王瑞珠孟凡青方乔乔赵德育南京医科大学附属儿童医院呼吸科南京210008 南京医科大学附属儿童医院放射科南京210008 南京大学医学院附属南京鼓楼医院病理科南京210008

目的分析6例儿童特发性间质性肺炎(IIP)的临床特点和预后转归。方法回顾性分析2015年1月至2020年3月在南京医科大学附属儿童医院住院的6例IIP患儿的临床表现、辅助检查、治疗方法以及预后转归等信息。结果6例患儿中男2例、女4例,起病年... 详细信息

目的分析6例儿童特发性间质性肺炎(IIP)的临床特点和预后转归。方法回顾性分析2015年1月至2020年3月在南京医科大学附属儿童医院住院的6例IIP患儿的临床表现、辅助检查、治疗方法以及预后转归等信息。结果6例患儿中男2例、女4例,起病年龄4.8~10.6岁。6例患儿均为亚急性起病,症状均为咳嗽、气促伴发绀。6例患儿肺高分辨CT(HRCT)均为两肺弥漫性片絮影,其中2例伴有网格状影。5例患儿的肺功能为中至重度混合性通气功能障碍。4例患儿行肺活检病理检查。6例患儿的治疗药物均为全身糖皮质激素,其中2例联合吸入糖皮质激素。4例患儿为隐源性机化性肺炎(COP),其肺HRCT恢复正常的时间为1~11个月。2例患儿为非特异性间质性肺炎(NSIP),其肺HRCT残留纤维化病灶,有剧烈运动不耐受。6例患儿停用全身激素后随访1年至6年5个月,均无复发。结论儿童IIP的临床特点为亚急性起病,以咳嗽、气促伴发绀为症状,肺HRCT示两肺弥漫性片絮影,常见类型为COP和NSIP。儿童IIP全身糖皮质激素治疗有效,总体预后良好。

关键词：肺疾病,间质性儿童糖皮质激素类预后

Cooperative User-Scheduling and Resource Allocation Optimization for Intelligent Reflecting Surface Enhanced LEO Satellite Communication

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China Communications 2024年第2期21卷 227-244页

作者： meng meng Bo Hu Shanzhi Chen Jianyin Zhang State Key Lab of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Lab of Wireless Mobile Communication China Academy of Telecommunication TechnologyBeijing 100191China Research Institute of China Mobile Beijing 100053China

Lower Earth Orbit(LEO) satellite becomes an important part of complementing terrestrial communication due to its lower orbital altitude and smaller propagation delay than Geostationary satellite. However, the LEO satellite communication system cannot meet the requirements of users when the satellite-terrestrial link is blocked by obstacles. To solve this problem, we introduce Intelligent reflect surface(IRS) for improving the achievable rate of terrestrial users in LEO satellite communication. We investigated joint IRS scheduling, user scheduling, power and bandwidth allocation(JIRPB) optimization algorithm for improving LEO satellite system *** optimization problem of joint user scheduling and resource allocation is formulated as a non-convex optimization problem. To cope with this problem, the nonconvex optimization problem is divided into resource allocation optimization sub-problem and scheduling optimization sub-problem firstly. Second, we optimize the resource allocation sub-problem via alternating direction multiplier method(ADMM) and scheduling sub-problem via Lagrangian dual method ***, we prove that the proposed resource allocation algorithm based ADMM approaches sublinear convergence theoretically. Finally, we demonstrate that the proposed JIRPB optimization algorithm improves the LEO satellite communication system throughput.

关键词： convex optimization intelligent reflecting surface LEO satellite communication OFDM

Identifying Comprehensive Genomic Alterations and Potential Neoantigens for Cervical Cancer Immunotherapy in a Cohort of Chinese Squamous Cell Carcinoma of the Cervix

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Biomedical and Environmental Sciences 2024年第6期37卷 565-580页

作者： meng Wu Jialu Zhou Zhe Zhang Yuanguang meng School of Medicine Nankai UniversityTianjin 300071China Department of Obstetrics and Gynecology The First Medical Center of Chinese PLA General HospitalBeijing 100853China Department of Obstetrics and Gynecology Chinese PLA Medical SchoolBeijing 100853China Department of Obstetrics and Gynecology The Seventh Medical Center of Chinese PLA General HospitalBeijing 100700China

Objective Genomic alterations and potential neoantigens for cervical cancer immunotherapy were identified in a cohort of Chinese patients with cervical squamous cell carcinoma(CSCC).Methods Whole-exome sequencing was used to identify genomic alterations and potential neoantigens for CSCC *** Sequencing was performed to analyze neoantigen *** Systematic bioinformatics analysis showed that C>T/G>A transitions/transversions were dominant in *** mutations were the most frequent types of somatic mutation in the coding sequence *** signature analysis detected signature 2,signature 6,and signature 7 in CSCC ***3CA,FBXW7,and BICRA were identified as potential driver genes,with BICRA as a newly reported *** variation profiling identified 4,960 potential neoantigens,of which 114 were listed in two neoantigen-related *** The present findings contribute to our understanding of the genomic characteristics of CSCC and provide a foundation for the development of new biotechnology methods for individualized immunotherapy in CSCC.

关键词： Cervical squamous cell carcinoma Genome alteration Neoantigens Immunotherapy

基于改进的PSO算法的PID控制在VAV空调系统末端的应用

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沈阳建筑大学学报（自然科学版） 2010年第3期26卷 592-598页

作者：马少华孟繁庆孙化泽沈阳建筑大学信息与控制工程学院辽宁沈阳110168

目的研究变风量空调系统温度-风量PID控制器的整定方法,利用改进粒子群算法的特点设计一种稳定、高效的自适应控制器.方法以PSO-CF(带收缩因子的PSO)PID控制方法的整定结果作为参考,在PSO-CF算法中用一个差分向量扰乱粒子的认知能力,再... 详细信息

目的研究变风量空调系统温度-风量PID控制器的整定方法,利用改进粒子群算法的特点设计一种稳定、高效的自适应控制器.方法以PSO-CF(带收缩因子的PSO)PID控制方法的整定结果作为参考,在PSO-CF算法中用一个差分向量扰乱粒子的认知能力,再根据粒子群的演化规则自动完成最优控制.结果采用DPSO-CF(扰乱认知能力的带收缩因子的粒子群)PID自适应控制器时,系统的调节时间约为PSO-CF粒子群PID控制方法的30%,超调量减少了约75%.当系统加入扰动时,相比带收缩因子的PSO,扰乱认知能力的带收缩因子的粒子群PID自适应控制器的调节时间少,超调量小,系统控制品质得到了较大的改善.结论改进的算法不仅具有良好的鲁棒性,而且还有良好的收敛性.采用上述自适应控制器后,整个系统体现了良好的动态性能及较强的鲁棒性.

关键词：粒子群算法收缩因子认知能力鲁棒性