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Coordinated Control Strategy of New Energy Power Generation System with Hybrid Energy Storage Unit

Energy Engineering 2025年第1期122卷 167-184页

作者： Yun Zhang ZifenHan Biao Tian ning chen Yi Fan School of Mechano-Electronic Engineering Xidian UniversityXi’an710071China Electric Power Control Center State Grid Gansu Electric Power CompanyLanzhou730030China Electric Power Control Center State Grid Gansu Electric Power Company Zhangye Power Supply BranchZhangye734000China

The new energy power generation is becoming increasingly important in the power *** as photovoltaic power generation has become a research hotspot,however,due to the characteristics of light radiation changes,photovoltaic power generation is unstable and random,resulting in a low utilization rate and directly affecting the stability of the power *** solve this problem,this paper proposes a coordinated control strategy for a newenergy power generation system with a hybrid energy storage unit based on the lithium iron phosphate-supercapacitor hybrid energy storage ***,the variational mode decomposition algorithm is used to separate the high and low frequencies of the power signal,which is conducive to the rapid and accurate suppression of the power fluctuation of the energy storage ***,the fuzzy control algorithm is introduced to balance the power between energy *** this paper,the actual data is used for simulation,and the simulation results show that the strategy realizes the effective suppression of the bus voltage fluctuation and the accurate control of the internal state of the energy storage unit,effectively avoiding problems such as overshoot and over-discharge,and can significantly improve the stability of the photovoltaic power generation systemand the stability of the Direct Current *** is of great significance to promote the development of collaborative control technology for photovoltaic hybrid energy storage units.

关键词： Photovoltaic power suppression hybrid energy storage unit variationalmodal decomposition fuzzy control power distribution control

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基于车路协同的农机信息采集与通信技术应用研究

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农机化研究 2025年第4期47卷 57-64页

作者：陈宁胡迪均浙江机电职业技术学院杭州310053 正大桑田(宁波)农业发展有限公司浙江慈溪310053

车路协同技术可以实现农机的智能调度、路径规划、远程监控等,提高农机作业效率和安全性。为了实现农业机械在复杂的农田环境中能够高效、快速地进行信息采集与交互,提出了一种改进的基于地理位置的路由协议算法,以车路协同的农机信息... 详细信息

车路协同技术可以实现农机的智能调度、路径规划、远程监控等,提高农机作业效率和安全性。为了实现农业机械在复杂的农田环境中能够高效、快速地进行信息采集与交互,提出了一种改进的基于地理位置的路由协议算法,以车路协同的农机信息采集与路由技术理论为基础,对车路协同信息采集与通信技术的硬件机软件系统进行设计与选型,可以实现农业机械载体信息采集时间、速度、航向和经纬度等地理位置数据的获取。同时,提出并实现了一种改进的基于地理位置的路由算法,并通过田间试验验证系统运行的稳定性和可靠性,结果表明:提出的IGPSR算法具有更高的数据传输速率和耕地端时延迟,可为推动农机作业智能、高效发展提供技术参考。

关键词：农机信息采集通信技术车路协同 CAN总线 GPSR 数据隐私

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杜诗叙事画论析--以成都杜甫草堂博物馆馆藏绘画为中心

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重庆文理学院学报（社会科学版） 2025年第1期44卷 127-140页

作者：陈宁房锐四川师范大学文学院四川成都610066 成都杜甫草堂博物馆四川成都610072

关于叙事画的概念,中国和西方存在着一定的差异,但在叙事手法、教化功能和图文关系等方面也存在一定的共识。文章在明确叙事画的概念、范畴和功能之后,通过对明清至近现代繁盛起来的杜诗叙事画的文本来源、画家群体及创作原因、选材与... 详细信息

关于叙事画的概念,中国和西方存在着一定的差异,但在叙事手法、教化功能和图文关系等方面也存在一定的共识。文章在明确叙事画的概念、范畴和功能之后,通过对明清至近现代繁盛起来的杜诗叙事画的文本来源、画家群体及创作原因、选材与形制的关系、艺术手法的演变四个方面进行详细分析,进一步明晰杜诗叙事画的图文关系。杜诗叙事画是对文本来源为杜诗内容的艺术展示,是画家对杜甫叙事诗的接收与传播;同时,观者通过叙事性的图画溯源于杜诗,可以加深对杜诗内容及其反映的唐代社会现实的深刻理解,体味杜甫的圣者仁心,并加深对其图文关系的认知。

关键词：杜甫叙事画叙事诗图文关系

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High-quality grand unified theories with three generations

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Chinese Physics C 2022年第5期46卷 60-69页

作者： ning chen School of Physics Nankai UniversityTianjin 300071China

We extend the unitary groups beyond the SU(5)and SU(6)to determine possible grand unified theories that give rise to three-generational Standard Model fermions without simple *** demanding asymptotic free theories at short distances,we find gauge groups of SU(7),SU(8),and SU(9),together with their anomaly-free irreducible representations,are such *** additional gauge groups of SU(10)and SU(11)can also achieve the generational structure without asymptotic *** also deduce that these models can solve the Peccei-Quinn(PQ)quality problem,which is intrinsic in the axion models,with the leading PQ-breaking operators determined from the symmetry requirement.

关键词： GUT flavor Peccei-Quinn quality

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Multipurpose audio watermarking algorithm

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第4期9卷 517-523页

作者： ning chen Jie ZHU Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China

To make audio watermarking accomplish both copyright protection and content authentication with localization, a novel multipurpose audio watermarking scheme is proposed in this paper. The zero-watermarking idea is introduced into the design of robust watermarking algorithm to ensure the transparency and to avoid the interference between the robust watermark and the semi-fragile watermark. The property of natural audio that the VQ indices of DWT-DCT coefficients among neighboring frames tend to be very similar is utilized to extract essential feature from the host audio, which is then used for watermark ex-traction. And, the chaotic mapping based semi-fragile watermark is embedded in the detail wavelet coefficients based on the instantaneous mixing model of the independent component analysis (ICA) system. Both the robust and semi-fragile watermarks can be extracted blindly and the semi-fragile watermarking algorithm can localize the tampering accurately. Simulation results demonstrate the effectiveness of our algorithm in terms of transparency, security, robustness and tampering localization ability.

关键词： Multipurpose audio watermarking Copyright protection Content authentication

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Robust decentralized H_∞ control of multi-channel systems with norm-bounded parametric uncertainties

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Journal of Systems Engineering and Electronics 2007年第4期18卷 871-878页

作者： chen ning Gui Weihua School of Information Science and Engineering Central South Univ. Changsha 410083 P.R. China

A robust decentralized H∞ control problem for uncertain multi-channel systems is considered. The uncertainties are assumed to be time-invariant, norm-bounded, and exist in both the system and control input matrices. The dynamic output feedback is mainly dealt with. A necessary and sufficient condition for the uncertain multi-channel system to be stabilized robustly with a specified disturbance attenuation level is derived based on the bounded real lemma, which is reduced to a feasibility problem of a nonlinear matrix inequality （NMI）. A two-stage homotopy method is used to solve the NMI iteratively. First, a decentralized controller for the nominal system with no uncertainty is computed by imposing structural constraints on the coefficient matrices of the controller gradually. Then the decentralized controller is modified, again gradually, to cope with the uncertainties. On each stage, a variable is fixed alternately at the iterations to reduce the NMI to a linear matrix inequality （LMI）. A given example shows the efficiency of this method.

关键词： robust decentralized control parametric uncertainty homotopy method nonlinear matrix inequality LMI

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Dropout training for SVMs with data augmentation

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Frontiers of Computer Science 2018年第4期12卷 694-713页

作者： ning chen Jun ZHU Jianfei chen Ting chen MOE Key lab of Bioinformatics Bioinformatics Division and Center for Synthetic and Systems Biology TNLIST Tsinghua University Beijing 100084 China State Key Lab of Intelligent Technology and Systems Department of Computer Science and Technology Tsinghua University Beijing 100084 China

Dropout and other feature noising schemes have shown promise in controlling over-fitting by artificially corrupting the training data. Though extensive studies have been performed for generalized linear models, little has been done for support vector machines （SVMs）, one of the most successful approaches for supervised learning. This paper presents dropout training for both linear SVMs and the nonlinear extension with latent representation learning. For linear SVMs, to deal with the intractable expectation of the non-smooth hinge loss under corrupting distributions, we develop an iteratively re-weighted least square （IRLS） algorithm by exploring data augmentation techniques. Our algorithm iteratively minimizes the expectation of a re- weighted least square problem, where the re-weights are analytically updated. For nonlinear latent SVMs, we con- sider learning one layer of latent representations in SVMs and extend the data augmentation technique in conjunction with first-order Taylor-expansion to deal with the intractable expected hinge loss and the nonlinearity of latent representa- tions. Finally, we apply the similar data augmentation ideas to develop a new IRLS algorithm for the expected logistic loss under corrupting distributions, and we further develop a non-linear extension of logistic regression by incorporating one layer of latent representations. Our algorithms offer insights on the connection and difference between the hinge loss and logistic loss in dropout training. Empirical results on several real datasets demonstrate the effectiveness of dropout training on significantly boosting the classification accuracy of both linear and nonlinear SVMs.

关键词： dropout SVMs logistic regression data aug- mentation iteratively reweighted least square

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On fractional control method for four-wheel-steering vehicle

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Science China(Technological Sciences) 2009年第3期52卷 603-609页

作者： chen ning chen Nan chen YanDong College of Mechanical Engineering Southeast UniversityNanjing 210096China College of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing 210037China

Four-wheel-steering (4WS) system can enhance vehicle cornering ability by steering the rear wheels in accordance with the front wheels steering and vehicle status. With such steering control system, it becomes possible to improve the lateral stability and handling performance. In this paper, a new control method for 4WS vehicle is proposed, its rear wheels steering angle is in accordance with the angle of front wheels steering and vehicle yaw rate, and the effects of front wheels steering angle velocity are considered by adopting the fractional derivative theory. Some design specifications for control law are also given. The effects of the control method are verified by a kind of numerical scheme presented in this paper. The dynamic characteristics such as the side-slip angle and the yaw angle velocity of the vehicle gravity center are compared among three kinds of vehicles with different control methods. And the kinematics characteristics such as turning radius between 4WS and 2WS are also discussed. Nu- merical simulation shows that the control method presented can improve the transient response and reduce the turning radius of 4WS vehicle.

关键词： fractional derivative four-wheel-steering computation simulation chassis control system

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Multipurpose speech watermarking based on multistage vector quantization of linear prediction coefficients

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The Journal of China Universities of Posts and Telecommunications 2007年第4期14卷 64-69页

作者： chen ning ZHU Jie Department of Electronic Engineering Shanghai Jiao Tong UniversityShanghai 200030 China

To make speech watermarking achieve both copyright protection and integrity verification, a novel multipurpose speech watermarking algorithm based on the multistage vector quantization （MSVQ） of linear prediction coefficients （LPCs） is presented in this article. The property of natural speech that the vector quantization （VQ） indices of the LPCs amongst neighboring frames tend to be very similar is utilized to embed the robust watermark in the indices of the first-stage VQ（VQ1）. Then, the semi-fragile watermark is embedded in the indices of the second-stage VQ（VQ2） with index constrained VQ encoding scheme. Both the robust watermark and the semi-fragile watermark can be extracted without host speech. Simulation results verify the effectiveness of the proposed algorithm in terms of robustness and semi-fragility.

关键词： multipurpose speech watermarking LPCs MSVQ

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Delay-dependent decentralized H_∞ filtering for uncertain interconnected systems

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Journal of Systems Engineering and Electronics 2008年第4期19卷 766-774页

作者： chen ning Gui Weihua Zhang Xiaofeng School of Information Science and Engineering Central South Univ. Changsha 410083 P. R. China

This article considers delay dependent decentralized H∞ filtering for a class of uncertain interconnected systems, where the uncertainties are assumed to be time varying and satisfy the norm-bounded conditions. First, combining the Lyapunov-Krasovskii functional approach and the delay integral inequality of matrices, a sufficient condition of the existence of the robust decentralized H∞ filter is derived, which makes the error systems asymptotically stable and satisfies the H∞ norm of the transfer function from noise input to error output less than the specified up-bound on the basis of the form of uncertainties. Then, the above sufficient condition is transformed to a system of easily solvable LMIs via a series of equivalent transformation. Finally, the numerical simulation shows the efficiency of the main results.

关键词： interconnected systems H∞ filtering delay-dependent LMI.

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