Feng Ji

Graph Distribution-Valued Signals: A Wasserstein Space Perspective

Yanan Zhao, Feng Ji, Xingchao Jian, Wee Peng Tay

We introduce a novel framework for graph signal processing (GSP) that models signals as graph distribution-valued signals (GDSs), which are probability distributions in the Wasserstein space. This approach overcomes key limitations of classical vector-based GSP, including the assumption of synchronous observations over …

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Cation‐Anion Co‐doped Na 3 V 2 (PO 4 ) 3 Cathode for Robust and High‐Performance Sodium‐Ion Storage

Tao Yang, Zhenzhen Wu, Xin Xu, Fuzhou Chen et autres

Abstract Sodium ion superconductors (NASICON) are widely perceived as potential cathodes for sodium‐ion batteries (SIBs) because of their good structural stability and high operation potential for Na + de/intercalation. Nevertheless, the limited sodium ion storage capacity, rate capability, and stability due to …

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Analysis of Hydrological Drought and Influencing Factors in Yunnan Province Using Integrated Gnss Observation Data and Xgboost Model

Yongyao Su, Zhen Qu, Y. N. Pu, Qiong Li et autres

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Analysis of Hydrological Drought and Influencing Factors in Yunnan Province Using Integrated Gnss Observation Data and Xgboost Model

Yongyao Su, Zhen Qu, Y. N. Pu, Qiong Li et autres

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Effective numerical simulations of synchronous generator system

Jiawei Zhang, Aiqing Zhu, Feng Ji, Lin Chang et autres

Synchronous generator system is a complicated dynamic system for energy transmission, which plays an important role in modern industrial production. In this article, we propose some predictor-corrector methods and structure-preserving methods for a generator system based on the first benchmark model of …

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A New Control Method of VSC to Supporting Instantaneous Voltage at PCC Point

Feng Ji, Huaiguang Gu, Lu Gao, Lin Chang et autres

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·Experimental Research on Shear Strength of Weak Interlayer Soils in Translational Landslides Based on Improved Direct Shear Methods

Limin Zhang, Hai Wang, Wenqiang Li, Pengyu Guo et autres

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Advances in macrophage-targeting nanoparticles for the diagnosis and treatment of inflammatory bowel disease

Sha Liu, Xia Yi, Feng Ji

The pathogenesis of inflammatory bowel disease (IBD) is not fully elucidated. However, it has been considered that inflammatory macrophages may be involved in the imbalance of the intestinal mucosal immunity to regulate several signaling pathways, leading to IBD progression. The ratio of …

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A New Control Method for Rectifier Converter Station Suitable for Renewable Energy Access

Shaoming Zheng, Yimin Liu, Peng Dong, Feng Ji et autres

The large-scale renewable energy generation sent through modular multilevel converter-high voltage direct current (MMC-HVDC) is one of the important development directions to help China build a new-typed power system with stronger renewable energy consumption capacity and reach the grand strategic objective of …

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A Vibration Signal Denoising Method Based on Whale Optimization Algorithm and Batch Normalized Convolutional Neural Network

Yue Wang, Youming Wang, Jiali Han, Yuxi Qin et autres

The random selection of the initial weights of convolutional neural network is prone to cause the network to fall into local optimum, which leads to the difficulty in the extraction of clean signals from noisy vibration signals. To address this problem, a …

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Control Strategy of Direct-Driven PMSM Wind Turbines Participating in Fast Frequency Response of Power Grid

Heming Yan, Feng Ji, Hui Pang, Wenxuan Jia et autres

The large-scale grid connection of wind power brings challenges to the frequency stability of the power system, the system inertia decreases, the frequency regulation capability deteriorates, and the traditional wind turbine is difficult to meet the frequency regulation demand of the system. …

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Control Strategy of Voltage Active Support and Fault Current Suppression in AC System of MMC

Lu Gao, Feng Ji, Caoyang Jia, Lin Chang et autres

The application of fully controlled insulated gate bipolar transistors as commutation devices and the voltage source converters constituted by them in power systems has produced and promoted the development of flexible direct current transmission technology. Considering the fragility of power electronic devices, …

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