From Daily Fluctuations to Annual Hydrological Cycles: A Wavelet-Based Analysis of Nonstationary Seasonality in Senegal River Hydropower Inflows
该研究使用傅里叶和小波分析方法，基于60年的数据，分析塞内加尔河三个站点的日流量季节性变化，揭示了年度周期主要对应D8细节级别，并提供了生成流入情景的透明框架。
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Selected work
Representative Papers
Twisted Conjugacy and the Classification of Induced Centrosymmetric Alternant Codes
This study addresses the systematic classification of centrally symmetric alternant codes induced by generalized Reed–Solomon codes. By analyzing their inherited automorphism structure, the authors introduce a twisted conjugation action associated with projective semilinear transformations and, for the first time, employ Shintani’s theorem to establish a correspondence between this twisted action and ordinary conjugacy in the projective semilinear group. Leveraging an analysis of γ_{p^j}-similarity classes, the paper derives necessary and sufficient conditions for an alternant code to admit a centrally symmetric structure induced by a projective semilinear automorphism. This result yields a unified, automorphism-based classification framework that enables the systematic categorization of all such induced centrally symmetric alternant codes.
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Subcodes of Lambda-Gabidulin Codes for Compact-Ciphertext Cryptography
This work addresses the challenges of large ciphertext sizes and security vulnerabilities arising from algebraic structure leakage in post-quantum cryptography by investigating subspace subcodes of Lambda-Gabidulin codes. Through coordinate scaling, these subcodes are linked to classical subcodes of Gabidulin codes, enabling the first explicit linearized polynomial representation. The study fully characterizes their dimension, encoding structure, and algebraic invariants of their base-field matrix images. Leveraging these insights, a novel random subcode generation method is proposed that conceals algebraic invariants, leading to a new LGS-Niederreiter public-key encryption scheme. At security levels of 128, 192, and 256 bits, this scheme achieves the smallest ciphertext size reported to date while maintaining competitive public-key sizes.
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Modeling the Senegalese artisanal fisheries migrations
This study investigates how climate change, fishing pressure, and socioeconomic factors jointly drive the migration dynamics of Senegal’s artisanal fisheries and their implications for resource sustainability. Innovatively treating fisher migration behavior as an indicator of fish stock status, the research integrates multisource, interdisciplinary data to develop a coupled agent-based and system dynamics model. Simulations under diverse climate and fishing scenarios reveal that maintaining current fishing intensity would lead to fishery collapse and large-scale displacement of fishers. In contrast, moderately reducing fishing effort enables stable, sustainable catches of approximately 250,000 metric tons annually across varying climate conditions. The proposed modeling framework offers a practical decision-support tool for regional fisheries policy and spatial management.
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From Daily Fluctuations to Annual Hydrological Cycles: A Wavelet-Based Analysis of Nonstationary Seasonality in Senegal River Hydropower Inflows
该研究使用傅里叶和小波分析方法，基于60年的数据，分析塞内加尔河三个站点的日流量季节性变化，揭示了年度周期主要对应D8细节级别，并提供了生成流入情景的透明框架。
0 citationsRead paper
Twisted Conjugacy and the Classification of Induced Centrosymmetric Alternant Codes
This study addresses the systematic classification of centrally symmetric alternant codes induced by generalized Reed–Solomon codes. By analyzing their inherited automorphism structure, the authors introduce a twisted conjugation action associated with projective semilinear transformations and, for the first time, employ Shintani’s theorem to establish a correspondence between this twisted action and ordinary conjugacy in the projective semilinear group. Leveraging an analysis of γ_{p^j}-similarity classes, the paper derives necessary and sufficient conditions for an alternant code to admit a centrally symmetric structure induced by a projective semilinear automorphism. This result yields a unified, automorphism-based classification framework that enables the systematic categorization of all such induced centrally symmetric alternant codes.
0 citationsRead paper
Subcodes of Lambda-Gabidulin Codes for Compact-Ciphertext Cryptography
This work addresses the challenges of large ciphertext sizes and security vulnerabilities arising from algebraic structure leakage in post-quantum cryptography by investigating subspace subcodes of Lambda-Gabidulin codes. Through coordinate scaling, these subcodes are linked to classical subcodes of Gabidulin codes, enabling the first explicit linearized polynomial representation. The study fully characterizes their dimension, encoding structure, and algebraic invariants of their base-field matrix images. Leveraging these insights, a novel random subcode generation method is proposed that conceals algebraic invariants, leading to a new LGS-Niederreiter public-key encryption scheme. At security levels of 128, 192, and 256 bits, this scheme achieves the smallest ciphertext size reported to date while maintaining competitive public-key sizes.
0 citationsRead paper
Modeling the Senegalese artisanal fisheries migrations
This study investigates how climate change, fishing pressure, and socioeconomic factors jointly drive the migration dynamics of Senegal’s artisanal fisheries and their implications for resource sustainability. Innovatively treating fisher migration behavior as an indicator of fish stock status, the research integrates multisource, interdisciplinary data to develop a coupled agent-based and system dynamics model. Simulations under diverse climate and fishing scenarios reveal that maintaining current fishing intensity would lead to fishery collapse and large-scale displacement of fishers. In contrast, moderately reducing fishing effort enables stable, sustainable catches of approximately 250,000 metric tons annually across varying climate conditions. The proposed modeling framework offers a practical decision-support tool for regional fisheries policy and spatial management.
0 citationsRead paper