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基于RF-TOPSIS-MCS的水库水质综合评价方法及应用

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水力发电 2025年第1期51卷 5-10页

作者：张冲陈末黑龙江大学水利电力学院黑龙江哈尔滨150080 黑龙江大学寒区地下水研究所黑龙江哈尔滨150080

在水库管理中,准确评估水质至关重要。然而,数据收集的不确定性和水质因子权重分配的局限性均会对评估结果产生影响。为了解决这一问题,以大伙房水库为研究对象,开发了一种新的水质综合评价方法,该方法结合了随机森林算法(RF)、优劣解... 详细信息

在水库管理中,准确评估水质至关重要。然而,数据收集的不确定性和水质因子权重分配的局限性均会对评估结果产生影响。为了解决这一问题,以大伙房水库为研究对象,开发了一种新的水质综合评价方法,该方法结合了随机森林算法(RF)、优劣解距离法(TOPSIS)和蒙特卡洛模拟(MCS)。首先根据实测的月均水质数据,通过MCS生成了一组正态分布的数据集。然后,利用RF赋权为TOPSIS方法分配权重,并借助隶属函数对水质进行综合评价。通过计算分析,得出的结果与辽宁省的月度水环境质量状况报告提供的水质等级相符,这表明此方法能为大型水库的水质评估提供有力的技术支持。

关键词：随机森林赋权优劣解距离法蒙特卡罗模拟水库水质评价

Security for cyber-physical systems: Secure control against known-plaintext attack

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Science China(Technological Sciences) 2020年第9期63卷 1637-1646页

作者： YUAN Ye mo YiLin School of Artificial Intelligence and Automation Hluatchong University of Science and TechmologyWuhan 430074China department of Automation BNRistTsinghua UniversityBeijing 100084China

There has been a surge of interests in the security of cyber-physical systems(CPSs), yet it is commonly assumed that the adversary has a full knowledge of physical system models. This paper argues that such an unrealistic assumption can be relaxed: the adversary might still be able to identify the system model by passively observing the control input and sensory data. In such a setup, the attack with knowledge of input-output data can be categorized as a Known-Plaintext Attack. A necessary and sufficient condition has been provided, under which the adversary can uniquely obtain the knowledge of the underlying physical *** the defender's perspective, a secure controller design—which exhibits a low rank structure—is proposed which renders the system unidentifiable to the adversary, while trading off the control system's performance. Finally, a numerical example has been provided to demonstrate the effectiveness of the proposed secure controller design.

关键词： cyber-physical systems security secure control known-plaintext attack

Insights into the mechanism of multiple Cu-doped Co Fe_(2)O_(4)nanocatalyst activated peroxymonosulfate for efficient degradation of Rhodamine B

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Journal of Environmental Sciences 2024年第3期137卷 382-394页

作者： Yuanmin mo Xiaoping Zhang School of Environment&Energy South China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006China The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education Guangzhou 510006China Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling Guangzhou 510006China Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency disposal Guangzhou 510006China

The multiple metal catalyst as a promising nanomaterial has shown excellent activity in the peroxymonosulfate(PMS)activation for pollutant ***,the role of special sites and in-depth understanding of the PMS activation mechanism are not fully *** this study,a Cu-doped CoFe_(2)O_(4)nanocatalyst(0.5CCF)was synthesized by a sol-gel and calcination method,and used for PMS activation to remove Rhodamine B(RhB).The results showed that the Cu doping obviously enhanced the catalytic performance of CoFe_(2)O_(4),with 99.70%of RhB removed by 0.5CCF while 74.91%in the CoFe_(2)O_(4)within 15 *** on the X-ray photoelectron spectroscopy and electrochemical analysis,this could be ascribed to the more low valence of Co and Fe species generated on the 0.5CCF and faster electron transfers occurred in the 0.5CCF due to the Cu *** addition,Cu doping could provide more reaction sites for the 0.5CCF to activate PMS for RhB *** metal species and the surface hydroxyl were the reaction sites of PMS activation,and the surface hydroxyl played an important role in surface-bound reactive species *** the PMS activation,the Cu not only activated PMS to produce reactive oxygen species(ROS),but also regenerated Co^(2+)and Fe^(2+)to accelerate the PMS *** non-radical of ^(1)O_(2)was the main ROS with a 99.35%of contribution rate,and the SO_(5)^(·–)self-reaction was its major *** study provides a new insight to enhance the PMS activation performance of multiple metal catalysts by Cu doping in wastewater treatment.

关键词： Cu-doped CoFe_(2)O_(4)nanocatalyst PMS activation Mechanism Rhodamine B removal

Embedding Theorems for L-Algebras and Anti-commutative Algebras

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Algebra Colloquium 2019年第1期26卷 51-64页

作者： Qiuhui mo School of Mathematics and Big data Huizhou University Huizhou Guangdong 516007 China

Bokut, Chen and Huang proved that every countably generated L-algebra over a cou nt able field can be embedded into a simple t wo-generated L-algebra. In this paper, we prove that every countably generated L-algebra can be embedded into a simple two-generated L-algebra. We also prove that every anti-commutative algebra can be embedded into a simple anti-commutative algebra, and that every countably generated anti-commutative algebra can be embedded into a simple two-generated anti-commutative algebra. Finally, we prove that every anti-commutative algebra can be embedded into its universal enveloping non-associative algebra.

关键词： L-algebra anti-commutative algebra Grdbner-Shirshov basis

Sampled Value Attack detection for Busbar differential Protection Based on a Negative Selection Immune System

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Journal of modern Power Systems and Clean Energy 2023年第2期11卷 421-433页

作者： Jun mo Hui Yang Guangxi Key Laboratory of Power System Optimization and Energy Technology Guangxi UniversityNanning 530004China

Considering a variety of sampled value(SV)attacks on busbar differential protection(BdP)which poses challenges to conventional learning algorithms,an algorithm to detect SV attacks based on the immune system of negative selection is developed in this *** healthy SV data of BdP are defined as self-data composed of spheres of the same size,whereas the SV attack data,i.e.,the nonself data,are preserved in the nonself space covered by spherical detectors of different *** avoid the confusion between busbar faults and SV attacks,a self-shape optimization algorithm is introduced,and the improved self-data are verified through a power-frequency fault-component-based differential protection criterion to avoid false *** on the difficulty of boundary coverage in traditional negative selection algorithms,a self-data-driven detector generation algorithm is proposed to enhance the detector coverage.A testbed of differential protection for a 110 kV double busbar system is then *** SV attacks of BdP such as amplitude and current phase tampering,fault replays,and the disconnection of the secondary circuits of current transformers are considered,and the delays of differential relay operation caused by detection algorithms are investigated.

关键词： Cyberattack busbar differential protection(BdP) negative selection self-data-driven detector sampled value attacks internal faults

GENERALIZEd VARIATION ITERATION SOLUTION OF AN ATmoSPHERE-OCEAN OSCILLATOR modEL FOR GLOBAL CLIMATE

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Journal of Systems Science & Complexity 2011年第2期24卷 271-276页

作者： Jiaqi mo Wantao LIN Anhui Normal University Wuhu 241000 China division of Computational Science E-Institutes of Shanghai Universities at Shanghai Jiaotong University Shanghai 200240 China State Key Laboratory of Numerical modeling for Atmospheric Sciences and Geophysical Fluid dynamic Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

A box model of the interhemispheric thermohaline circulation （THC） in atmosphere-ocean for global climate is considered. By using the generalized variational iteration method, the approximate solution of a simplified nonlinear model is studied. The generalized variational iteration method is an analytic method, and the obtained analytic solution can be operated sequentially. The authors also diversify qualitative and quantitative behaviors for corresponding physical quantities.

关键词： Approximate solution atmosphere-ocean E1 Nino-Southern oscillation variational iteration.

ASYMPTOTIC SOLUTION OF ACTIVATOR INHIBITOR SYSTEMS FOR NONLINEAR REACTION dIFFUSION EQUATIONS

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Journal of Systems Science & Complexity 2008年第1期21卷 119-128页

作者： Jiaqi mo Wantao LIN department of Mathematics Anhui Normal University Wuhu 241000 China division of Computational Science E-Institutes of Shanghai Universities at SJTU Shanghai 200240 China. LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China.

A nonlinear reaction diffusion equations for activator inhibitor systems is considered. Under suitable conditions, firstly, the outer solution of the original problem is obtained, secondly, using the variables of multiple scales and the expanding theory of power series the formal asymptotic expansions of the solution are constructed, and finally, using the theory of differential inequalities the uniform validity and asymptotic behavior of the solution are studied.

关键词： Activator system nonlinear reaction diffusion singular perturbation.

High-performance programming frameworks for numerical simulation

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National Science Review 2016年第1期3卷 28-29页

作者： Zeyao mo Institute of Applied Physics and Computational Mathematics Chinese Academy of Sciences

Over the past 20 years,a variety of research activities on high-performance programming have taken place ***-purpose application programming interfaces(GAPIs)have been designed and standardized;for example,MPI and Ope... 详细信息

关键词： data JASMIN

Consensus of Linear Multi-Agent Systems with Persistent disturbances via distributed Output Feedback

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Journal of Systems Science & Complexity 2019年第3期32卷 835-845页

作者： mo Lipo GUO Shaoyan School of Science Beijing Technology and Business University

This paper addresses the consensus problem of general linear multi-agent systems with persistent disturbances by distributed output feedback. Suppose that states of agents can not be obtained directly. Several estimators are designed to observe states of agents and the unknown disturbances. A protocol is proposed to drive all agents achieve consensus. Based on the method of model transforniation and the property of permutation matrix, sufficient conditions for consensus are obtained in terms of linear matrix inequalities. Finally, simulations are given to show the effectiveness of presented results.

关键词： Consensus distributed observer leaderless multi-agentsystems persistent disturbances