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Prediction of Listed Company Innovation Ability Based on Attention Mechanism

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Journal of the Operations Research Society of China 2023年第1期11卷 177-187页

作者： Huan-yu Ma yan Xu yu-Long Liu Department of Information and Computer Science University of Science and Technology BeijingBeijing100083China no.15 Research Institute China Electronics Technology Group CorporationBeijing100083China

Innovation is the center of the enterprise development, which is the main driving force of enterprises’ competitiveness. To evaluate the enterprises’ innovation ability, we firstly establish an index system which aims at analyzing the enterprise innovation ability. We also retrieve the data of the listed companies in Wind database from 2015 to 2019 and label them using factor analysis method. Then, a new deep learning classificational framework with attention mechanism and LSTM is established. The results show that when attention mechanism and LSTM are added into the convolutional neural network(Cnn), the model’s prediction performance is better improved, and the accuracy, recall, precision and F-score are 0.914, 0.914, 0.916 and 0.915, respectively. This indicates the strong generalization ability of our new model. Finally, we also find that patents and R &D expenditures are the most important factor affecting the corporate innovation ability through SHapley Additive exPlanations(SHAP). Companies with more patents and R &D expenditures are generally considered to be more innovative.

关键词： Corporate innovation ability convolutional neural network Attention mechanism long short-term memory

Recent Progress on Modification Strategies of Alloy-based Anode Materials for Alkali-ion Batteries

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Chemical Research in Chinese Universities 2021年第2期37卷 200-209页

作者： WU Ying YAO yu WAnG Lifeng yu yan Hefei national Laboratory for Physical Sciences at the Microscale Department of Materials Science and EngineeringCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei230026P.R.China Dalian national Laboratory for Clean Energy(DnL) Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023P.R.China

Alkali-ion batteries,including lithium-ion batteries(LIBs),sodium-ion batteries(nIBs)and potassium-ion batteries(KIBs),with alloy-based anodes exhibit huge potential in high energy density due to the natural abundance,high theoretical capacity as well as suitable operating ***,the practical application is severely hindered by the huge volume variation based on the alloying mechanism and inferior conductivity,especially for red phosphorus(P)and silicon(Si)anodes,which induces poor rate capability and fast capacity ***,we will briefly review fundamental advantages and challenges of alloy-based anode ***,effective modification strategies of alloy-based anode materials for boosting the performance would be emphasized and ***,we will share our perspectives and some opportunities to obtain high-performance alloy-based anode materials for further application.

关键词： Alloy-based anode Alkali-ion battery Modification strategy

Effects of PEG Molecular Weight on Its Interaction with Albumin

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Chinese Journal of Polymer Science 2015年第10期33卷 1373-1379页

作者： Jing-jing Lai Huai-yu Yan.yan Liu 黄延宾 Key Laboratory of Advanced Materials(MOE) Department of Chemical Engineering Tsinghua University

The fluorescence property of bovine serum albumin was investigated in the presence of PEGs of different molecular weights. Based on our results, we propose that PEGs of different molecular weights bind to albumin in the pH 7.4 aqueous solution, but only when the polymer size is larger than the protein size, one polymer chain may bind to multiple proteins and cause the proteins to aggregate.

关键词： Polyethylene glycol Bovine serum albumin Protein-polymer interactions Fluorescence analysis

非遗技艺数字化保护的发展趋势研究——基于CiteSpace科学知识图谱的可视化分析

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长江师范学院学报 2025年第1期41卷 125-132页

作者：郭延龙孙玉洁新疆和田学院艺术学院新疆和田848000 安徽大学艺术学院安徽合肥230601

研究以“非遗技艺数字化保护”英文关键词为检索对象,将Web of Science核心合集数据库作为数据源。利用CiteSpace科学知识图谱的可视化手段,对非遗技艺数字化保护发展趋势研究、关键词共现等相关主题归纳分析,揭示出非遗技艺数字化保护... 详细信息

研究以“非遗技艺数字化保护”英文关键词为检索对象,将Web of Science核心合集数据库作为数据源。利用CiteSpace科学知识图谱的可视化手段,对非遗技艺数字化保护发展趋势研究、关键词共现等相关主题归纳分析,揭示出非遗技艺数字化保护的发展现状、热点分析和未来趋势。得出数字化技术与非遗技艺的深度融合是非遗技艺数字化保护未来发展重点,同时更加重视非遗技艺数据库的完善,非遗数字化技术的继承、传播与发展和对相关技术人员的培养。

关键词：非遗保护数字化知识图谱 CiteSpace

Operation of a Rotary-valved Pulse Detonation Rocket Engine Utilizing Liquid-kerosene and Oxygen

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Chinese Journal of Aeronautics 2011年第6期24卷 726-733页

作者： WAnG Ke FAn Wei yan yu ZHU Xudong yan Chuanjun School of Power and Energy Northwestern Polytechnical University Xi ＇an 710072 China

The pulse detonation rocket engine （PDRE） requires periodic supply of oxidizer, fuel and purge gas. A rotary-valve assembly is fabricated to control the periodic supply in this research. Oxygen and liquid aviation kerosene are used as oxidizer and fuel respectively. An ordinary automobile spark plug, with ignition energy as low as 50 mJ, is used to initiate combustion. Steady operation of the PDRE is achieved with operating frequency ranging from 1 Hz to 10 Hz. Experimentally measured pressure is lower than theoretical value by 13% at 1 Hz and 37% at 10 Hz, and there also exists a velocity deficit at different operating frequencies. Both of these two phenomena are believed mainly due to droplet size which depends on atomization and vaporiza-tion of liquid fuel.

关键词： pulse detonation rocket engines rotary-valve velocity deficit kerosene oxygen

A new K-Ary Crisp Decision Tree Induction with Continuous Valued Attributes

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Chinese Journal of Electronics 2017年第5期26卷 999-1007页

作者： SOnG yan YAO Shuang yu Donghua SHEn.yan HU yuzhen School of Economics and Management Harbin Engineering University School of Computer Science and Technology Harbin Institute of Technology College of Science Harbin Engineering University

The simplicity and interpretability of decision tree induction makes it one of the more widely used machine learning methods for data ***,for continuous valued(real and integer) attribute data,there is room for further improvement in classification accuracy,complexity,and tree *** propose a new K-ary partition discretization method with no more than K –1 cut points based on Gaussian membership functions and the expected class number.A new K-ary crisp decision tree induction is also proposed for continuous valued attributes with a Gini index,combining the proposed discretization *** results and non-parametric statistical tests on 19 real-world datasets showed that the proposed algorithm outperforms four conventional approaches in terms of both classification accuracy,tree scale,and particularly tree *** the number of nodes,the proposed methods decision tree tends to be more balanced than in the other four *** complexity of the proposed algorithm was relatively low.

关键词： Decision tree K-ary decision tree Continuous valued attribute Gaussian membership function

A Construction of Weakly Inverse Semigroups

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Acta Mathematica Sinica,English Series 2009年第5期25卷 759-784页

作者： Bing Jun yu yan LI College of Mathematics and Software Science Sichuan Normai University Chengdu 610066 P. R. China Department of Mathematics Yang-En University Quanzhou 362014 P. R. China

Let S° be an inverse semigroup with semilattice biordered set E° of idempotents and E a weakly inverse biordered set with a subsemilattice Ep = { e ∈ E ｜ arbieary f ∈ E, S（f , e） loheain in w（e）} isomorphic to E° by θ：Ep→E°. In this paper, it is proved that if arbieary f, g ∈E, f ←→ g→→ f°θD^s° g°θand there exists a mapping φ from Ep into the symmetric weakly inverse semigroup P J（E∪ S°） satisfying six appropriate conditions, then a weakly inverse semigroup ∑ can be constructed in P J（S°）, called the weakly inverse hull of a weakly inverse system （S°, E, θ, φ） with I（∑） ≌ S°, E（∑） ∽- E. Conversely, every weakly inverse semigroup can be constructed in this way. Furthermore, a sufficient and necessary condition for two weakly inverse hulls to be isomorphic is also given.

关键词： weakly inverse semigrouP VP(Vagner-Preston's) representation weakly inverse biorderedset weakly inverse system weakly inverse hull

Electrokinetic characteristic and coagulation behavior of flocculant polyaluminum silicate chloride (PASiC)

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Journal of Environmental Sciences 2003年第1期15卷 69-74页

作者： yuEQin.yan GAOBao－yu 等 DepartmentofEnvironmentalEngineering SchoolofEnvironmentalShangdongUniversityJina250100China

The electrokinetic characteristics and coagulation behaviors of polyaluminum silicate chloride (PASiC) and polyaluminum chloride (PAC) were studied and compared by streaming current (SC) measurement and jar test method. The experimental results showed that the interaction between polysilicic acid characterized negative charge and hydrolyzed aluminum species result in a decrease of the charge neutralizing ability of PASiC, compared to PAC. The decrease has a close relationship with the basicity ( B ) and Al/Si molar ratio in PASiC. The less the B value and the Al/Si molar ratio, the lower the charge neutralizing ability of PASiC is. In contrast, the preparation technique for PASiC affects the charge-neutralization of PASiC to a smaller extent. In addition, compared with PAC, PASiC may enhance aggregating efficiency and give better coagulating effects.

关键词： flocculant polyaluminum chloride (PASiC) streaming current (SC) electrokinetic characteristics coagulation effect

Research on Ratio of new Energy Vehicles to Charging Piles in China

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Computer Systems Science & Engineering 2022年第9期42卷 963-984页

作者： Zhiqiu yu Shuo-yan Chou Department of Industrial Management National Taiwan University of Science and TechnologyTaipei10607Taiwan

With the widespread of new energy vehicles, charging piles have alsobeen continuously installed and constructed. In order to make the number of pilesmeet the needs of the development of new energy vehicles, this study aims toapply the method of system dynamics and combined with the grey prediction theory to determine the parameters as well as to simulate and analyze the ratio ofvehicles to chargers. Through scenario analysis, it is predicted that by 2030, thisratio will gradually decrease from 1.79 to 1. In order to achieve this ratio as 1:1, itis necessary to speed up the construction of public charging station or privatecharging station. Due to global warming, the attitudes of countries towards fuelvehicles have become increasingly tough. There is huge uncertainty in the growthrate of electric vehicles. Therefore, it is recommended that the construction ofcharging station be deployed in advance to avoid hindering the development ofelectric vehicles in the future.

关键词： new energy vehicles charging piles system dynamic grey forecasting