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基于改进Transformer模型的多元时间序列预测

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南阳师范学院学报 2025年第1期24卷 38-45页

作者：程艺锐李果南阳师范学院人工智能与软件工程学院河南南阳473061

在无线数据传输中,环境干扰和网络拥塞导致的数据丢包和缺失问题显著影响了时间序列预测的稳定性。为了解决这个问题,提出了一种名为TFKNet的时间序列预测模型。该模型基于Transformer的多维时间序列数据预测方法,在传统Transformer模... 详细信息

在无线数据传输中,环境干扰和网络拥塞导致的数据丢包和缺失问题显著影响了时间序列预测的稳定性。为了解决这个问题,提出了一种名为TFKNet的时间序列预测模型。该模型基于Transformer的多维时间序列数据预测方法,在传统Transformer模型的基础上,结合时间卷积网络(TCN)和傅立叶频率特征提取技术增强了模型对局部特征的捕捉能力和多频率特征的提取能力,引入Kernel Attention Networks(KAN)提高了模型的预测性能。实验结果表明,与Transformer、Informer、Reformer、Autoformer传统方法相比,TFKNet模型在时间序列长预测任务中预测误差MAE分别平均降低0.0522、0.1117、0.1209、0.1922。

关键词：数据预测 Transformer TCN KAN 傅立叶频率特征

Nijenhuis algebras, NS algebras, and N-dendriform algebras

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Frontiers of Mathematics in China 2012年第5期7卷 827-846页

作者： Peng LEI li guo Department of Mathematics Lanzhou University Lanzhou 730000 China Department of Mathematics and Computer Science Rutgers UniversityNewark NJ 07102 USA

In this paper, we study （associative） Nijenhuis algebras, with emphasis on the relationship between the category of Nijenhuis algebras and the categories of NS algebras and related algebras. This is in analogy to the well-known theory of the adjoint functor from the category of lie algebras to that of associative algebras, and the more recent results on the adjoint functor from the categories of dendriform and tridendriform algebras to that of Rota- Baxter algebras. We first give an explicit construction of free Nijenhuis algebras and then apply it to obtain the universal enveloping Nijenhuis algebra of an NS algebra. We further apply the construction to determine the binary quadratic nonsymmetric algebra, called the N-dendriform algebra, that is compatible with the Nijenhuis algebra. As it turns out, the N-dendriform algebra has more relations than the NS algebra.

关键词： Nijenhuis algebras Rota-Baxter algebras dendriform algebras NSalgebras N-dendriform algebras

Nannochloropsis artificial chromosomes(Nanno ACs)loom on the horizon

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Journal of Oceanology and limnology 2023年第6期41卷 2336-2347页

作者： li guo Guanpin YANG College of Marine life Sciences Ocean University of ChinaQingdao 266003China Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao 266003China Key Laboratory of Marine Genetics and Breeding of Ministry of Education Ocean University of ChinaQingdao 266003China

Species in genus Nannochloropsis,especially *** and ***,have been evolving as the model microalgae for both application and theory *** position effect of genome integration,the carrying capability limitation of integrative vectors and the instability of non-integrative vectors have hindered Nannochloropsis genetic modification with concatenate genes and extremely long DNA *** molecular tools including genetic transformation,homologous recombination,gene edition,gene stacking and episome vectors for transient gene expression and diverse reporters and selection markers have been rapidly developing in Nannochloropsis *** construction of animal and plant artificial chromosomes with“top down”strategy has set fine examples for the construction of Nannochloropsis artificial chromosomes(NannoACs).It seems that the methods and materials to set the foundation for constructing NannoACs are at *** this review,we outlined the current status of transgenes in Nannochloropsis species,summarized the limitations of both integrative and non-integrative vectors,and proposed a tentative approach to construct NannoACs by doubling and stabilizing the genome first,and then truncating the natural *** once constructed will facilitate transferring the desired traits and concatenate genes into Nannochloropsis genetic backgrounds,thus contributing towards its genetic improvement and synthetic biological studies.

关键词： Nannochloropsis artificial chromosome microalgal genetic improvement gene stacking concatenate gene trait transfer

Multi-scale finite element analysis of chloride diffusion in concrete incorporating paste/aggregate ITZs

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Science China(Physics,Mechanics & Astronomy) 2012年第9期55卷 1696-1702页

作者： guo li guo XiaoMing MI ChangWen Jiangsu Key Laboratory of Engineering Mechanics Department of Engineering Mechanics Southeast University Nanjing 210096 China

In this paper,we propose a concurrent multi-scale finite element(FE) model coupling equations of the degree of freedoms of meso-scale model of ITZs and macroscopic model of bulk *** multi-scale model is subsequently implemented and integrated into ABAQUS resulting in easy application to complex concrete structures.A few benchmark numerical examples are performed to test both the accuracy and efficiency of the developed model in analyzing chloride diffusion in *** examples clearly demonstrate that high diffusivity of ITZs,primarily because of its porous microstructure,tends to accelerate chloride penetration along concentration *** proposed model provides new guidelines for the durability analysis of concrete structures under adverse operating conditions.

关键词： multi-scale model ITZ concrete durability coupling equations finite element method

解淀粉芽孢杆菌wxy-b3产脂肽类物质对苹果斑点落叶病菌的抑菌活性研究

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陕西科技大学学报 2025年第1期43卷 46-51页

作者：崔皓玥田露胡乐梅龚国利陕西科技大学食品科学与工程学院陕西西安710021

苹果斑点落叶病菌是苹果生产过程中常见的病害,严重危害苹果农作物的产量.脂肽作为一种主要来源于微生物次生代谢产物的抗菌剂,具有广谱抑菌、低耐药性、安全低毒等优势.本研究发现,解淀粉芽孢杆菌wxy-b3产生的脂肽类物质能够抑制苹果... 详细信息

苹果斑点落叶病菌是苹果生产过程中常见的病害,严重危害苹果农作物的产量.脂肽作为一种主要来源于微生物次生代谢产物的抗菌剂,具有广谱抑菌、低耐药性、安全低毒等优势.本研究发现,解淀粉芽孢杆菌wxy-b3产生的脂肽类物质能够抑制苹果斑点落叶病菌的生长,对苹果斑点落叶病菌的最小抑菌浓度为16 mg/mL,此浓度可造成该病原菌细胞膜电位超极化、线粒体膜电位去极化、大分子蛋白质和核酸泄露,以及胞内活性氧和丙二醛含量分别累积增加0.33倍和5.44倍,并通过扫描电镜进一步观察到MIC处理组的细胞形态起皱、细胞膜破损.上述结果表明,脂肽可能通过破坏细胞膜系统,导致细胞形态发生变化,细胞膜破裂,改变细胞膜通透性来达到抑菌效果.该研究将为脂肽作为抑制苹果斑点落叶病菌的抗菌剂奠定理论基础.

关键词：解淀粉芽孢杆菌脂肽类物质苹果斑点落叶病菌抑菌活性

WAVE MAKING COMPUTATION IN TIME DOMAIN FOR MULTI-HULL SHIPS

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Journal of Hydrodynamics 2006年第2期18卷 225-230页

作者： li guo-an YE Heng-kui School of Traffic Science and Engineering Huazhong University of Science and Technology Wuhan 430074China

A method Green function satisfying of three-dimensional time domain linear conditions at free surface and body surface boundary was employed to analyze the wave resistance and wave profile of a displacement multi-hull ship. The wave profile induced by a moving time domain point source was compared with those by a Havelock source, and satisfactory results were obtained. The panel method based on the time domain source distribution on the ship mean wetted hull surface was used to perform the wave making com- putations tbr mono-hull ships, catamaran and trimaran. Reasonable results were also obtained. Using the numerical method the wave profile simulations of multi-hull ships for a given Froude number were conducted.

关键词： time domain Green function ship wave making mono-hull catamaran trimaran

Fluorescence and preparation of Sr_2(P_2O_7 ):Ce,Tb phosphate by co-precipitation method

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Rare Metals 2013年第4期32卷 420-424页

作者： Cheng-guo Ma Wei Zheng li-guo Jin li-Min Dong School of Material Science & Engineering Harbin University of Science and Technology

The micron-sized Sr2（P2OT）：Ce,Tb green phosphors were prepared by being annealed at different temperatures with its precursors synthesized by co-pre-cipitates of （NH4）2HPO4 at ambient temperature. The phase structure, grain size, surface morphology, and luminescent properties of phosphors were investigated by X-ray diffraction, scanning electron microscope, trans-mission electron microscope, and fluorescence spectrum. The results show that the product of precursor annealed at 1,100 ℃ is Sr2（P2O7）：Ce,Tb, which belongs to ortho-rhombic phase. The powder is spherical and the size dis-tribution is in micron grade. The sample with the molar ratio of Sr/Tb/Ce of 100.0：0.4：0.6 shows the best fluores-cence effect annealed at 1,100 ℃ for 3 h. The phosphors produce green fluorescence by being excitated with ultra-violet radiation of 254 nm wavelength, and the main emission peak is at 547 nm. The Sr2（P2O7）：Ce,Tb phos-phors synthesized by co-precipitation method of precursors at ambient temperature is a kind of efficient green-emitting phosphors.

关键词： Phosphors Co-precipitation method Rareearth phosphate Phosphorescence

Celebrating the work of Nobel Laureate Paul Modrich

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Science China(life Sciences) 2016年第1期59卷 93-96页

作者： guo-Min li Department of Biochemistry and Molecular Biology Norris Comprehensive Cancer Center University of Southern California Keck School of Medicine University of Southern California

On October 7, 2015, the Nobel Prize Committee announced that the 2015 Nobel Prize in Chemistry had been awarded jointly to Professors Paul Modrich, Tomas lindahl and Aziz Sancar （Figure 1）, each of whom made ground-breaking discoveries about the molecular mechanisms of DNA Re- pair. In one of life＇s unpredictable turns, Paul was among the last individuals in his entire personal, professional and social network to learn of the Committee＇s decision, be- cause Paul was very far ＂off-the-grid＂ at the time of the announcement. The news that he had been selected as a 2015 Nobel Laureate may have taken Paul by surprise, but it certainly was not a surprise to most, if not all, of Paul＇s colleagues, students, family and friends.

关键词：诺贝尔奖获得者诺贝尔化学奖诺贝尔奖得主分子机制委员会托马斯 DNA 突破性

Identification of key factors affecting the failure of aviation piston engine turbochargers based on an improved correspondence analysis-polar angle-based classification

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Chinese Journal of Aeronautics 2021年第5期34卷 466-484页

作者： Mengyao BAO Shuiting DING guo li Civil Aviation Management Institute of China Beijing 100102China Aircraft|Engine Integrated System Safety Beijing Key Laboratory Beihang UniversityBeijing 100083China

Turbocharging is an efficient approach for addressing power reduction and oil consumption increase in aviation piston engines during high-altitude ***,a turbocharger significantly increases the complexity of a power system,and its considerably complex matching relation with the engine results in a coupling of failure *** analytical methods are hard to identify failure-inducing ***,safety issues are becoming increasingly *** study focuses on methods for identifying failure-inducing factors.A whole-machine system model is established and validated through *** response surface method is employed to further abstract the system simulation model to a surrogate model(average error:~3%)in order to reduce the computational cost while ensuring *** this basis,an improved Correspondence Analysis(CA)-Polar Angle(PA)-based Classification(PAC)is proposed to identify the key factors affecting the failure mode of *** identification method is based on the row profile coordinates G varying with the numerical deviations of the key factors,and is capable of effectively identifying the key factors affecting the *** a validation example,this method identifies the diameter of the exhaust valve(e_(2))as the primary factor affecting the safety margin for each work boundary.

关键词： Failure-inducing factors Improved correspondence analysis Polar angle Turbochargers Whole-machine system model