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Science China(Technological Sciences) 2025年第2期68卷 199-215页

作者： Xiangyu DU min xiao Wenwu YU Jiajin HE College of Automation&College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Mathematics Southeast UniversityNanjing 211189China

Traditionally,the spatiotemporal dynamics of neural networks have been analyzed in the locally continuous *** this modeling approach is straightforward and practical,it fails to encapsulate real-world networks’intricate topological structures and ***,the mechanisms of stability switches induced by time delays and diffusion effects in networkorganized systems are still ***,effective dynamic optimization strategies for network-organized models remain to be *** this study,we develop a delayed reaction-diffusion neural network model on complex *** system incorporates the effects of inter-nodal diffusion coupling and exhibits profound architectural *** then pioneer the proportional-integral-derivative(PID)feedback control into the network-organized model to modulate dynamic *** linear stability analysis is conducted firstly,demonstrating that Turing patterns and Hopf bifurcation can be induced in the controlled neural network by varying diffusion coefficients and time ***,the bifurcation direction is deduced via the center manifold ***,a series of simulations are performed to validate the theoretical analysis and substantiate the efficacy of the PID control *** results exhibit that the PID feedback controller can flexibly regulate the dynamics of the network-organized systems and possesses excellent disturbance rejection capabilities.

关键词： complex network neural networks PID control turing instability hopf bifurcation time delays turing pattern

ALFIN-like proteins link histone H3K4me3 to H2A ubiquitination and coordinate diverse chromatin modifications in Arabidopsis

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Molecular Plant 2025年第1期18卷 130-150页

作者： xiao-min Su Dan-Yang Yuan Na Liu Zhao-Chen Zhang minqi Yang Lin Li She Chen Yue Zhou Xin-Jian He College of Life Sciences Beijing Normal UniversityBeijing100875China National Institute of Biological Sciences Beijing 102206China State Key Laboratory of Protein and Plant Gene Research School of Advanced Agricultural SciencesPeking-Tsinghua Center for Life SciencesPeking UniversityBeijing 100871China Tsinghua Institute of Multidisciplinary Biomedical Research Tsinghua UniversityBeijing 10084China

Trimethylation of histone H3K4(H3K4me3)is widely distributed at numerous actively transcribed protein-coding genes throughout the ***,the interplay between H3K4me3 and other chromatin modifications in plants remains poorly *** this study,we show that the Arabidopsis thaliana ALFIN-LIKE(AL)proteins contain a C-terminal PHD finger capable of binding to H3K4me3 and a PHD-associated AL(PAL)domain that interacts with components of the Polycomb repressive complex 1,thereby facilitating H2A ubiquitination(H2Aub)at H3K4me3-enriched genes throughout the ***,we demonstrate that loss of function of SDG2,encoding a key histone H3K4 methyltransferase,leads to a reduction in H3K4me3 level,which subsequently causes a genome-wide decrease in H2Aub,revealing a strong association between H3K4me3 and ***,we discover that the PAL domain of AL proteins interacts with various other chromatin-related proteins or complexes,including those involved in regulating H2A.Z deposition,H3K27me3 demethylation,histone deacetylation,and chromatin *** genome-wide analysis suggests that the AL proteins play a crucial role in coordinating H3K4me3 with multiple other chromatin modifications across the genome.

关键词： ALFIN-like proteins PRC1 histone H3K4me3 H2Aub H2A.Z

融合语义分割与模糊推理的无人机应急降落选址算法

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计算机工程与应用 2025年第1期61卷 174-185页

作者：李迪肖敏任东谢咏昶姚远三峡大学计算机与信息学院湖北宜昌443002 三峡大学湖北省农田环境监测工程技术研究中心湖北宜昌443002

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应,对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题,提出了一种实时语义分割网络与模糊推理相结合的降落选址算法(STDC-L... 详细信息

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应,对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题,提出了一种实时语义分割网络与模糊推理相结合的降落选址算法(STDC-LSSNet)。考虑到潜在危险因素在航拍图像上占比小、易被错误分割的问题,提出了小目标特征提取模块(small target feature capture module,STFCM),通过计算不同尺度特征的相似性并进行权重分配,强化小目标特征的表达。考虑到安全区域与危险区域边界混淆会导致无人机降落存在巨大风险,提出了边界特征融合模块(boundary feature fusion module,BFFM),将浅层网络由拉普拉斯卷积得到的边界信息与深层网络的语义信息进行特征融合,引入注意力机制,增强边界区域特征的表达。通过对分割得到的图像进行模糊推理,从而精确识别应急降落地点。所提算法在公开数据集Semantic Drone和AeroScapes上与最先进的算法进行了广泛的对比实验,mIoU提升1.72个百分点和3.89个百分点,实时分割速度达到210 FPS,选址的速度达到58.62 ms,实现了无人机在复杂情况下的应急降落选址。

关键词：无人机自主降落实时语义分割模糊推理注意力机制

Green revolution gene drives adaptation of Arabidopsis to the extremely high altitude

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Science China Life Sciences 2025年

作者： Xing-Hui Hou Yong-Chao Xu Tian-Shu Sun Yan-Bo Gong Xin-Tong Li Guang-Teng Jin Yu-Tao Bian Yi-Ni Liu Juan Jiang xiao-min Niu Hong-Ya Gu Ya-Long Guo State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences China National Botanical Garden State Key Laboratory for Protein and Plant Gene Research School of Life Sciences Peking University College of Life Sciences University of Chinese Academy of Sciences

To elucidate the process of adaptation, particularly the traits subject to natural selection and the molecular mechanisms underlying their natural variation, is one of the primary objectives of evolutionary biology. The uplifted landscape offers an excellent framework for understanding how organisms adapt to dramatic climatic gradients. To investigate the genetic basis of plant adaptation to the extremely high altitude, we first compared the genomic and phenotypic variations of two closely related Arabidopsis thaliana accessions from high altitude(Xizang, also known as “Tibet”) and low altitude(Yunnan), respectively. The Xizang population represents a relict group characterized by a small effective population size. Notably, the Xizang genome has more transposable elements(TEs) and more gene loss-offunction(LoF) mutations. Differentially expressed genes were enriched in biological processes of cellular response to oxygen-containing compound, regulation of defense response, and response to light intensity. Intriguingly, the phenotypic selection analysis revealed that silique density was under natural selection. Furthermore, we genetically mapped and validated that the LoF mutation of GA20ox1, the homologous gene of green revolution in rice, resulted in a higher silique density in Xizang Arabidopsis. Given that GA20ox1 is linked to Arabidopsis adaptation to the Alps Mountains, its parallel evolution plays an important role in the adaptation to Alpine habitats. Overall,our results highlight that identifying adaptive traits and elucidating the molecular mechanisms underlying natural variation of these traits is crucial for unraveling the mystery of adaptive evolution and has significant implications for crop breeding.

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神经网络分岔动力学综述

自动化学报 2025年第1期51卷 72-89页

作者：肖敏陆云翔虞文武郑卫新南京邮电大学自动化学院、人工智能学院南京210023 东南大学数学学院南京211189 西悉尼大学计算机、数据与数学学院悉尼NSW 2751澳大利亚

自1982年著名的Hopfield神经网络问世以来,神经网络的分岔动力学受到了学术界的广泛关注.首先,回顾四类经典神经网络的数学模型和它们在各个领域的应用.接着,综述近三十年来关于整数阶神经网络(Integer-order neural networks,IONNs)、... 详细信息

自1982年著名的Hopfield神经网络问世以来,神经网络的分岔动力学受到了学术界的广泛关注.首先,回顾四类经典神经网络的数学模型和它们在各个领域的应用.接着,综述近三十年来关于整数阶神经网络(Integer-order neural networks,IONNs)、分数阶神经网络(Fractional-order neural networks,FONNs)、超数域神经网络(Supernumerary-domain neural networks,SDNNs)以及反应扩散神经网络(Reaction-diffusion neural networks,RDNNs)分岔动力学的相关研究成果.分析诸多组合因素,包括节点规模、耦合情形、拓扑结构、系统阶次、复值、四元数、八元数、扩散、时滞、随机性、脉冲、忆阻、激活函数等对神经网络分岔动力学的影响,并展示神经网络在多个领域的广泛应用.最后,对神经网络分岔动力学所面临的挑战以及未来的研究方向进行总结和展望.

关键词：神经网络时滞非线性动力学稳定性分岔周期性混沌

对深基坑工程中智能化边坡监测技术应用的探析

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工程建设与设计 2025年第3期 170-172页

作者：莫晓敏中建六局建设发展有限公司天津300450

以某城市中心区域的深基坑工程边坡监测为例,详细介绍了智能化边坡监测系统的基本原理及其在工程中的具体应用。结果表明,智能化系统能够实时、准确地监测边坡的位移和沉降,对基坑监测起到有效的智能化监测和预警,排除潜在的安全风险。

关键词：智能化系统边坡监测深基坑工程工程应用

新麦草独脚金内酯合成相关基因CCD7的克隆及表达分析

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草地学报 2025年第2期33卷 382-390页

作者：艾芊云岚任晓敏姚娜内蒙古农业大学草业学院内蒙古呼和浩特010018 草地资源教育部重点实验室内蒙古呼和浩特010011

植物CCD7基因参与合成独脚金内酯。为研究新麦草[Psathyrostachys juncea(Fisch.)Nevski]CCD7基因的功能,本研究以多分蘖型新麦草和少分蘖型新麦草的分蘖节为材料,通过RNA-seq及荧光定量PCR分析CCD7基因在新麦草中的表达量,通过构建pcam... 详细信息

植物CCD7基因参与合成独脚金内酯。为研究新麦草[Psathyrostachys juncea(Fisch.)Nevski]CCD7基因的功能,本研究以多分蘖型新麦草和少分蘖型新麦草的分蘖节为材料,通过RNA-seq及荧光定量PCR分析CCD7基因在新麦草中的表达量,通过构建pcambia1300-cYFP-CCD7过表达载体,分析新麦草CCD7基因在烟草叶片中的亚细胞定位;通过生物信息学分析预测CCD7基因的基本功能。结果显示,新麦草CCD7基因序列克隆全长为1638 bp,亚细胞定位新麦草CCD7基因在烟草叶片细胞的叶绿体中表达;表达量分析表明新麦草的分蘖数量与该基因的表达量呈现负相关关系。预测新麦草CCD7保守结构域的范围是第13到第544个氨基酸,该基因在9个近缘物种中功能保守,编码蛋白性质相近,新麦草CCD7蛋白的丝氨酸磷酸化位点最有可能是蛋白发挥功能的磷酸化位点。

关键词：新麦草 CCD7 过表达载体亚细胞定位基因克隆

Modeling and Adaptive Sliding Mode Control of the Catastrophic Course of a High-speed Underwater Vehicle

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International Journal of Automation and computing 2013年第3期10卷 210-216页

作者： min xiao College of Computer and Information Technology China Three Gorges University

Abstract： The mathematical model of a high-speed underwater vehicle getting catastrophe in the out-of-water course and a nonlinear sliding mode control with the adaptive backstepping approach for the catastrophic course are proposed. The speed change is large at the moment that the high-speed underwater vehicle launches out of the water to attack an air target. It causes motion parameter uncertainties and affects the precision attack ability. The trajectory angle dynamic characteristic is based on the description of the transformed state-coordinates, the nonlinear sliding mode control is designed to track a linear reference model. Furthermore, the adaptive backstepping control approach is utilized to improve the robustness against the unknown parameter uncertainties. With the proposed control of attitude tracking, the controlled navigational control system possesses the advantages of good transient performance and robustness to parametric uncertainties. These can be predicted and regulated through the design of a linear reference model that has the desired dynamic behavior for the trajectory of the high-speed underwater vehicle to attack its target. Finally, some digital simulation results show that the control system can be applied to a catastrophic course, and that it illustrates great robustness against system parameter uncertainties and external disturbances.

关键词： Catastrophic model adaptive backstepping attitude control underwater launching trajectory control

Fault-Tolerant Controlled Quantum Dialogue Using Logical Qubit

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Chinese Journal of Electronics 2018年第2期27卷 263-269页

作者： xiao min LIU Guang School of Cyber Security and Information Law Chongqing University of Posts and Telecommunications College of Computer Science and Technology Chongqing University of Posts and Telecommunications

The information leakage is a challenge in the design of Controlled quantum dialogue(CQD) protocols and the CQD protocol over noise channel has not been well researched. A CQD protocol without information leakage over an ideal channel is first proposed, where single photons are used to carrying secret information and pre-shared keys are used to authenticate identity and control information decoding for the prevention of information leakage, moreover, a novel kind of the unitary encoding operations with good property on the quantum operation discrimination are adopted to avoid active attacks from outside eavesdropper. By substituting logical qubits for single photons and constructing unitary encoding operations with the same property based on logical qubits,three fault-tolerant versions of the proposed CQD protocol are obtained, which can combat collective-dephasing,collective-rotation and all kinds of unitary collective noise,respectively. The security and efficiency analysis show the proposed protocols are appropriate for secure quantum dialogue in practice.

关键词： Controlled quantum dialogue(CQD) Single photon Logical qubit Noise channel

A review of environmental characteristics and effects of low-molecular weight organic acids in the surface ecosystem

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Journal of Environmental Sciences 2014年第5期26卷 935-954页

作者： min xiao Fengchang Wu State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences

Low molecular weight organic acids （LMWOAs） are prevalent on the earth＇s surface. They are vital intermediate products during metabolic pathways of organic matter and participate in the tricarboxylic acid cycle during life activities. Photochemical reactions are pivotal for LMWOAs＇ origination and play a large role in determining their diversity and their ultimate fate. Within the long time that organic matter is preserved in sediments, it can be decomposed and converted to release organic and inorganic pollutants as well as C, N, and P nutrients, which are of potential ecological risk in causing secondary pollution to lake water. The sediment pool is a comprehensive and complex compartment closely associated with overlying water by various biochemical processes, during which LMWOAs play critical roles to transport and transform elements. This article elucidates geochemical behaviors of LMWOAs in the surface environment in details, taking natural water, soil, and aerosol as examples, focusing on reviewing research developments on sources and characteristics, migration and mineralization of LMWOAs and relevant environmental effects. Simultaneously, this review article depicts the categories and contents of LMWOAs or their contribution to DOC in environmental media, and evaluates their importance during organic matter early diagenesis. Through concluding and discussing the conversion mechanisms and influencing factors, the next research orientations on LMWOAs in lake ecosystems are determined, mainly concerning relationships with hydrochemical parameters and microorganisms, and interactions with pollutants. This will enrich the knowledge on organic matter degradation and related environmental effects, and help reconstruct a theoretical framework for organic compound succession and influencing factors, providing basic data for lake eutrophication and ecological risk assessment, conducive to better control over water pollution and proper management of water quality.

关键词： low molecular weight organic acids conversion mechanism pollutants environmental effects ecological risk management of water quality