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DecMamba:Mamba Utilizing Series Decomposition for Multivariate Time Series Forecasting

Computers, Materials & Continua 2025年第1期82卷 1049-1068页

作者： Jianxin Feng Jianhao Zhang ge cao Zhiguo Liu Yuanming Ding Communication and Network Key Laboratory Dalian UniversityDalian116622China

Multivariate time series forecasting iswidely used in traffic planning,weather forecasting,and energy *** decomposition algorithms can help models better understand the underlying patterns of the original series to improve the forecasting accuracy of multivariate time ***,the decomposition kernel of previous decomposition-based models is fixed,and these models have not considered the differences in frequency fluctuations between *** problems make it difficult to analyze the intricate temporal variations of real-world time *** this paper,we propose a series decomposition-based Mamba model,DecMamba,to obtain the intricate temporal dependencies and the dependencies among different variables of multivariate time series.A variable-level adaptive kernel combination search module is designed to interact with information on different trends and periods between *** backbone structures are proposed to emphasize the differences in frequency fluctuations of seasonal and trend *** with superior performance is used instead of a Transformer in backbone structures to capture the dependencies among different variables.A new embedding block is designed to capture the temporal features better,especially for the high-frequency seasonal component whose semantic information is difficult to acquire.A gating mechanism is introduced to the decoder in the seasonal backbone to improve the prediction accuracy.A comparison with ten state-of-the-art models on seven real-world datasets demonstrates that DecMamba can better model the temporal dependencies and the dependencies among different variables,guaranteeing better prediction performance for multivariate time series.

关键词： Data prediction time series Mamba series decomposition

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Distributed Detection Mechanism and Resilient Consensus Strategy for Secure Voltage Control of AC Microgrids

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CSEE Journal of Power and Energy Systems 2023年第3期9卷 1066-1077页

作者： Lina Sheng Wei Gu ge cao School of Cyber Science and Engineering Southeast UniversityNanjing 211189China School of Cyber Science and Engineering and the School of Electrical EngineeringSoutheast UniversityNanjing 210096China School of Electrical Engineering Southeast UniversityNanjing 210096China

Distributed secondary control,depending on the sparse communication topology,excels for its flexibility and expandability in *** communication network plays an important role in microgrid control,but it is vulnerable to *** this paper,the mathematical model for false data injection(FDI)attacks in AC microgrids is established,and the corresponding detection mechanism based on the morphological gradient is designed for the location of cyber-attacks in communication ***,we propose a median-based resilient consensus voltage control strategy to mitigate the negative effects caused by malicious cyber-attacks and ensure the safe operation of the *** the detection method and resilient consensus control,a novel eventdriven mitigation scheme is derived to improve the resilience of microgrids under ***,a tested microgrid model composed of five different distributed generation(DG)units is simulated in the MATLAB/Simulink *** feasibility and effectiveness of the presented detection mechanism and resilient consensus strategy are verified by simulation results applying different scenarios.

关键词： Detection mechanism event-driven mitigation method FDI attacks microgrid voltage control resilient consensus control

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H∞ Robustness for Distributed Control in Autonomous Microgrids Considering Cyber Disturbances

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 696-706页

作者： ge cao Guannan Lou Wei Gu Lina Sheng School of Electrical Engineering Southeast UniversityNanjing 210096China

The physical connections and logical relationships between microgrids and communication networks allow microgrids to develop into typical cyber-physical systems(CPSs).With the extensive use of open communication mechanisms,the impact of cyber disturbances in public communication networks cannot be *** this paper,a parameter optimal method for a distributed secondary controller based on the robust control theory and consensus algorithm is presented to enhance the robustness of a secondary control system under data disturbance,parameter perturbation,and time ***,a distributed secondary control strategy of microgrids is demonstrated that coordinates frequency and voltage restoration and power ***,considering the impact of cyber events on the secondary control,a distributed robust controller gain design method is proposed to satisfy the H∞ performance *** solution of the distributed robust control is transformed into a linear matrix in equation problem and latency margin is simultaneously ***,a test microgrid CPS is simulated with and without time delay to investigate the impact of cyber events on system operational states and the effectiveness and robustness of the proposed method.

关键词： Cyber disturbance cyber-physical lsystem distributed control microgrid robust H∞control

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Multi-source Local Color Transfer Based on Texture Similarity

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Chinese Journal of Electronics 2014年第4期23卷 718-722页

作者： WANG Xuesong cao ge CHENG Yuhu School of Information and Electrical Engineering China University of Mining and Technology

In order to realize automatic region matching between source and target images, a multi-source local color transfer algorithm based on texture similarity is proposed. The source and target images are segmented into a set of regions using an image segmentation algorithm. It computes the texture features of each region through the gray level co-occurrence matrix and then constructs corresponding texture feature vectors. The authors measure the relevance between the target and source regions by computing the Euclidean distance between corresponding texture feature vectors. The source region having the largest relevance with the target region is selected as the transfer source. Complete the color transfer by performing color space transformation and linear conversion on color values. Experimental results concerning on multi-source local color transfer and gray image colorization verify the validity of the proposed algorithm.

关键词： Texture similarity Gray level co-occurrence matrix Color transfer Multi-source transfer Local transfer

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Microstructure and mechanical properties of liquid phase sintered silicon carbide composites

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第10期11卷 766-770页

作者： Jing-mei MA Feng YE Yan-ge cao Chun-feng LIU Hai-jiao ZHANG School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Air China Corporation Limited Engineering and Technology Branch Beijing 101312 China

Silicon carbide (SiC) composites were prepared by hot-press sintering from α-SiC starting powders with BaAl2Si2O8 (BAS). The effects of additives on densification, microstructure, flexural strength, and fracture behavior of the liquid phase sintered (LPS) SiC composites were investigated. The results show that the served BAS effectively promotes the densification of SiC composites. The flexural strength and fracture toughness of the SiC composites can reach a maximum value of 454 MPa and 5.1 MPa·m1/2, respectively, for 40% (w/w) BAS/SiC composites. SiC grain pullout, crack deflection, and crack bridging were main toughening mechanisms for the sintered composites.

关键词： Silicon carbide (SiC) BaAl2Si2O8 (BAS) Liquid phase sintered (LPS) Mechanical properties

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Microtremor-based analysis of the dynamic response characteristics of a site containing grouped earth fissures

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Earthquake Engineering and Engineering Vibration 2023年第3期22卷 689-702页

作者： Deng Yahong Xuan You Mu Huandong Chang Jiang cao ge He Nainan Zhao Xunchang Sun Longfei College of geological Engineering and geomatics Chang′an UniversityXi′an 710064China Key Laboratory of Mine geological Hazards Mechanism and Control Xi′an 710064China Institute of geotechnical Engineering Xi′an University of TechnologyXi′an 710048China

In this study,the Beibu earth fissure site in the northeastern part of Weihe Basin,which contains four nearly parallel earth fissures,was studied.A long straight microtremor measuring line,containing 49 measuring points across four earth fissures,was established to investigate the dynamic response of this site using Fourier spectrum,response acceleration spectrum,Arias intensity,and HVSR *** main results are as follows:(1)The fundamental frequencies of 44 measuring points obtained from HVSR analysis are concentrated within 1.67 Hz-2.25 Hz,and the existence of the earth fissures has little effect on the fundamental frequency changes.(2)There is an amplification effect near a single earth *** dynamic responses are large at the measuring points near the earth fissure,and the values decrease with increasing distance from the earth *** areas between two adjacent earth fissures,these values decrease and are even lower than those in sites without amplification effects.(3)In this earth fissure site,the general area(or less affected area)and affected areas were delineated based on the amplification *** engineering applications,construction design should avoid these affected areas and existing structures should be reinforced to satisfy the seismic fortification requirements.

关键词： earth fissure sites microtremors Fourier amplitude spectrum response spectrum arias intensity H/V spectral ratio fundamental frequency amplification effect

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药物治疗管理在社区糖尿病合并高血压患者中的应用效果评价

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中国社区医师 2025年第2期41卷 9-11页

作者：曹歌北京市西城区白纸坊社区卫生服务中心药剂科北京100054

目的:探讨药物治疗管理在社区糖尿病合并高血压患者中的应用效果。方法:将2021年1月—2023年10月北京市西城区白纸坊社区卫生服务中心签约的糖尿病合并高血压患者84例随机分成对照组与试验组,各42例。对照组实施传统家庭医生管理模式,... 详细信息

目的:探讨药物治疗管理在社区糖尿病合并高血压患者中的应用效果。方法:将2021年1月—2023年10月北京市西城区白纸坊社区卫生服务中心签约的糖尿病合并高血压患者84例随机分成对照组与试验组,各42例。对照组实施传统家庭医生管理模式,试验组在对照组基础上实施药物治疗管理。对比两组干预效果。结果:干预后,试验组体质量指数、收缩压、舒张压、糖化血红蛋白、空腹血糖、甘油三酯、总胆固醇、低密度脂蛋白胆固醇水平低于对照组,高密度脂蛋白胆固醇水平及用药依从性、满意度、生活质量评分高于对照组(P<0.05)。结论:药物治疗管理在社区糖尿病合并高血压患者中的应用效果显著,可改善患者血压、血糖、血脂水平,提高患者用药依从性、满意度、生活质量。

关键词：糖尿病高血压药物治疗管理

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Optimization of light efficacy and angular color uniformity by hybrid phosphor particle size for white light-emitting diode

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Rare Metals 2014年第3期33卷 348-352页

作者： Dong-Chuan Chen Zhu-Guang Liu Zhong-Hua Deng Chong Wang Yong-ge cao Quan-Lin Liu School of Materials Science & Engineering University of Science and Technology Beijing National Engineering Research Center for Optoelectronic Crystalline Materials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences College of Science Renmin University of China

In this study, small- and large-particle-diameter phosphor powders were mixed together（hybrid phosphors）to balance light efficacy and angular color uniformity and pursue optimal results. Phosphor with small-particlediameter of 4 lm was employed and it was mixed into each large-particle-diameter phosphor of 10, 16, 22, and 26 lm,at mass percentage from 0 % to 50 % with an interval of10 %, respectively. Remote phosphor package was adopted and overall phosphor concentration was kept constant for better comparison. Moreover, absorption coefficient labs,scattering coefficient lscaand extinction coefficient lext of each hybrid phosphors were calculated based on Mie theory to further discuss the experiment results. Results show that, the introduction of small-particle-diameter phosphor to large one can highly improve angular color uniformity while only slightly reduce light efficacy. The optimal performance with angular color uniformity of91.6 % as well as normalized light efficacy of 95.7 % is achieved in the white light emitting diode with hybrid phosphors consisting of 60 wt% powder of 22 μm and40 wt% powder of 4 μm.

关键词： Hybrid phosphors Light efficacy Angularcolor uniformity

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Peak wavelength selection guides of chip and phosphors for phosphor-converted white light-emitting diodes

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Rare Metals 2014年第1期33卷 80-85页

作者： Dong-Chuan Chen Zhen Song Zhu-Guang Liu Zhong-Hua Deng Lan Wu Yong-ge cao Quan-Lin Liu School of Materials Science & Engineering University of Science and Technology Beijing National Engineering Research Center for Optoelectronic Crystalline Materials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences College of Science Renmin University of China

The dependences of light efficiency of radiation （LER） and color-rendering index （CRI） of trichromatic white light-emitting diode （wLED）, composed of blue LED die, green/yellow, and red phosphors, on the peak wave- length of each primary were investigated by theoretical calculations, at correlative color temperature （CCT） from 2,700 to 6,500 K. The peak wavelength of InGaN based blue LED chip ranges from 450 to 471 nm, while those of Ca3Sc2Si3012：Ce3＋, b-SiA1ON：Eu2＋, and Y3A15012：Ce3＋ based green/yellow phosphors range from 511 to 572 nm, and those of Sr2SisN8：Eu2＋ and CaA1SiN3：Eu2＋ red phosphors range from 620 to 650 nm, which cover almost all the practically used, commercially available wave bands until now. Then, based on the results, selection guides of peak wavelengths for blue LED chip and phosphors to obtain tradeoff LER 〉280 lm.W-1 as well as CRI 〉80 in all CCTs are proposed. The favorable wave bands of each primary are suggested.

关键词： Luminous efficacy of radiation Color rendering index Correlative color temperature Peak wavelength Selection guide

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Bifunctional flexible electrochromic energy storage devices based on silver nanowire flexible transparent electrodes

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International Journal of Extreme Manufacturing 2023年第1期5卷 307-316页

作者： He Zhang Fangyuan Sun ge cao Dongyan Zhou Guofan Zhang Jiayun Feng Shang Wang Fengyu Su Yanqing Tian Yan Jun Liu Yanhong Tian State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001People’s Republic of China Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055People’s Republic of China Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055People’s Republic of China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Key Laboratory of Energy Conversion and Storage Technology(Southern University of Science and Technology) Ministry of EducationShenzhen 518055People’s Republic of China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450041People’s Republic of China

Flexible electrochromic energy storage devices(FECESDs)for powering flexible electronics have attracted considerable *** nanowires(AgNWs)are one kind of the most promising flexible transparent electrodes(FTEs)materials for the emerging flexible ***,fabricating FECESD based on AgNWs FTEs is still hindered by their intrinsic poor electrochemical *** address this issue,a hybrid AgNWs/Co(OH)_(2)/PEDOT:PSS electrode is *** PEDOT:PSS could not only improve the resistance against electrochemical corrosion of AgNWs,but also work as functional layer to realize the color-changing and energy storage ***,the Co(OH)_(2)interlayer further improved the color-changing and energy storage *** on the improvement,we assembled the symmetrical *** the same condition,the areal capacitance(0.8 mF cm^(−2))and coloration efficiency(269.80 cm^(2)C−1)of AgNWs/Co(OH)_(2)/PEDOT:PSS FECESDs were obviously higher than AgNWs/PEDOT:PSS ***,the obtained FECESDs exhibited excellent stability against the mechanical *** areal capacitance remained stable during 1000 times cyclic bending with a 25 mm curvature *** results demonstrated the broad application potential of the AgNWs/Co(OH)_(2)/PEDOT:PSS FECESD for the emerging portable and multifunctional electronics.

关键词： electrochromic device energy storage device silver nanowires flexible transparent electrode

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