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面向装备系统评估的仿真实验因子筛选综述

兵器装备工程学报 2017年第3期38卷 67-71页

作者：杨柠檬杨凡德闫雪飞施令装备学院复杂电子系统仿真实验室北京101416

在利用仿真实验评估装备系统的研究过程中,仿真实验因子筛选对于提高仿真的有效性和高效性具有重要的意义。重点针对多因子筛选技术进行了综述,介绍了实验因子筛选问题的相关概念,比较分析了几种常用因子筛选方法的步骤,归纳了现有方法... 详细信息

在利用仿真实验评估装备系统的研究过程中,仿真实验因子筛选对于提高仿真的有效性和高效性具有重要的意义。重点针对多因子筛选技术进行了综述,介绍了实验因子筛选问题的相关概念,比较分析了几种常用因子筛选方法的步骤,归纳了现有方法的不足。现有实验因子筛选方法在应对装备系统复杂性研究方面面临挑战,仿真实验因子规模增加,因子间因果关联机理复杂,为了提高仿真实验效率和满足实验分析的整体性要求,需要探索更合理的实验因子筛选理论和方法。

关键词：复杂装备系统仿真实验实验因子因子筛选方法综述

Extracting Relevant Terms from Mashup Descriptions for Service Recommendation

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Tsinghua Science and Technology 2017年第3期22卷 293-302页

作者： yang Zhong Yushun fan Department of Automation Tsinghua UniversityBeijing 100084China

Due to the exploding growth in the number of web services, mashup has emerged as a service composition technique to reuse existing services and create new applications with the least amount of effort. Service recommendation is essential to facilitate mashup developers locating desired component services among a large collection of candidates. However, the majority of existing methods utilize service profiles for content matching, not mashup descriptions. This makes them suffer from vocabulary gap and cold-start problem when recommending components for new mashups. In this paper, we propose a two-step approach to generate high-quality service representation from mashup descriptions. The first step employs a linear discriminant function to assign each term with a component service such that a coarse-grained service representation can be derived. In the second step, a novel probabilistic topic model is proposed to extract relevant terms from coarse-grained service representation. Finally, a score function is designed based on the final high-quality representation to determine recommendations. Experiments on a data set from *** show that the proposed model significantly outperforms state-of-the-art methods.

关键词： service recommendation topic model mashup descriptions linear discriminant function

COX-2信号通路及其调控对皮肤伤口愈合的干预研究

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解剖学研究 2011年第2期33卷 101-104,F0004页

作者：罗嘉伦涂腊根潘丽杨扬帆杨铮洪乐鹏广州医学院护理学院广东广州510180 中山大学中山眼科中心广东广州510060 中山大学附属第一医院广东广州500050 广州医学院人体解剖学教研室

目的通过体外及体内干预实验研究探讨COX-2信号通路对皮肤伤口炎症细胞、新生血管的影响,评价皮肤伤口愈合的情况,为减少伤口瘢痕形成、促进愈合的诊疗方法提供实验依据。方法采用体外细胞培养划痕试验及小鼠体内实验,运用COX-2选择性... 详细信息

目的通过体外及体内干预实验研究探讨COX-2信号通路对皮肤伤口炎症细胞、新生血管的影响,评价皮肤伤口愈合的情况,为减少伤口瘢痕形成、促进愈合的诊疗方法提供实验依据。方法采用体外细胞培养划痕试验及小鼠体内实验,运用COX-2选择性抑制剂尼美舒利进行干预,通过伤口皮肤铺片、免疫组化对伤口生长过程中炎症细胞、新生血管、成纤维细胞的生长情况进行观察;愈合伤口数字化分析来进行评价。结果使用尼美舒利通过对COX-2信号通路进行调控对于皮肤伤口愈合有明显的影响,适当浓度的尼美舒利能够抑制伤口炎症反应,使成纤维细胞迁移控制在合适的程度。结论在小鼠手术伤口应用适当浓度的选择性COX-2抑制剂尼美舒利能减少病理性瘢痕的形成,值得进一步探讨其在创伤、美容、烧伤等方面的应用。

关键词：伤口愈合瘢痕抑制环氧合酶2 尼美舒利

Universal design of three-dimensional porous graphene-iron based promotors for kinetically rationalized lithium-sulfur chemistry

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Journal of Energy Chemistry 2025年第1期100卷 192-200页

作者： Hua Gao Yunfeng Zhang Menglei Wang Ruoxuan yang Shuai Feng Xuan Cao Yaping Zhang Zhongyuan Lu Yingze Song State Key Laboratory of Environment-Friendly Energy Materials School of Materials and Chemistry Southwest University of Science and Technology School of Material Science and Engineering Henan University of Technology College of Chemistry and Chemical Engineering Taishan University

Lithium-sulfur （Li-S） batteries are widely deemed to be one of the most potential candidates for future secondary batteries because of their remarkable energy ***,notorious polysulfide shuttling and retarded sulfur reaction kinetics pose significant obstacles to the further application of Li-S *** rationally designed highly active electrocatalysts can facilitate polysulfide conversion,the universal and scalable synthesis strategies need to be ***,a universal synthetic strategy to construct a series of three-dimensional （3D） porous graphene-iron （3DGr-Fe） based electrocatalysts involving 3DGr-FeP,3DGr-Fe3C,and 3DGr-Fe3Se4is exploited for manipulating the Li-S redox *** has been observed that the implementation of a 3D porous Gr architecture leads to the well-designed conductive networks,while the uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering the lithium polysulfide conversion,thereby bolstering the overall electrochemical *** Li-S battery with the 3DGr-Fe based electrocatalyst exhibits remarkable capacity retention of 94.8%upon 100 times at 0.2 ***,the soft-packaged Li-S pouch cell based on such a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h g-1and guarantees for the continuous 30 min work of fan *** investigation gives comprehensive insights into the design,synthesis,and mechanism of 3DGr-Fe based electrocatalysts with high activity toward efficient and durable Li-S batteries.

关键词： Lithium-sulfur battery Universal synthesis 3D graphene-iron based promotor Electrocatalysis

Multi-UAV cooperative maneuver decision-making for pursuitevasion using improved MADRL

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Defence Technology（防务技术） 2024年第5期35卷 187-197页

作者： Delin Luo Zihao fan Ziyi yang yang Xu School of Aerospace Engineering Xiamen UniversityXiamen 361102China School of Civil Aviation Northwestern Polytechnical UniversityXi'an 710072China

Aiming at the problem of multi-UAV pursuit-evasion confrontation, a UAV cooperative maneuver method based on an improved multi-agent deep reinforcement learning(MADRL) is proposed. In this method, an improved Comm Net network based on a communication mechanism is introduced into a deep reinforcement learning algorithm to solve the multi-agent problem. A layer of gated recurrent unit(GRU) is added to the actor-network structure to remember historical environmental states. Subsequently,another GRU is designed as a communication channel in the Comm Net core network layer to refine communication information between UAVs. Finally, the simulation results of the algorithm in two sets of scenarios are given, and the results show that the method has good effectiveness and applicability.

关键词： Reinforcement learning UAV Maneuver decision GRU Cooperative control

N-doped carbon nanotube encapsulated nZVI as a high-performance bifunctional catalyst for oxidative desulfurization

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Particuology 2023年第10期81卷 109-118页

作者： Ge Zhang fan yang Wang yang Yongfeng Li State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijingChina Beijing NAURA Vacuum Technology Co. LtdBeijingChina

Great efforts have been made to remove sulfur from fossil fuels to protect the *** proposed synthesis of high efficiency oxidation desulfurization(ODS)catalysts by encapsulating nano zero valent iron(nZVI)in self-catalyzed carbon *** synthetic strategy features facile hydrothermal and pyrolysis *** specific surface area,pore structure,and microstructure of the catalysts were characterized by series techniques,and the catalytic ability was evaluated by the reduction of sulfur after oxidation and *** optimized nZVI@CNT catalyst exhibits outstanding catalytic performance(within 120 min,the oxidative removal rate of DBT reached 96%)and enhanced stability(a 80%retention of initial performance after six cycles.),revealing the effective optimization and modulation between carbon nanotubes and iron *** excellent ODS activity originated from the defects of N-doped nanotubes as well as excellent particle dispersion and material transport capacity,which excites highly active free radicals with the assistance of H_(2)O_(2).In addition,the unique two-dimensional tube channel and mesoporous structure promoted the diffusion and transfer of reactants and electrons,leading to high density of active *** different experimental conditions confirmed that the material is a bifunctional catalyst integrating adsorption and *** work provides an creative ideas for the rational design and synthesis of advanced ODS catalysts for fuel oil.

关键词： Carbon nanotubes Oxidative desulfurization Dispersion Nanoscale zero valent iron

Antibacterial Property and Precipitation Behavior of Ag-Added304 Austenitic Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2014年第3期27卷 539-545页

作者： yang Xuan Chi Zhang Nianqing fan Zhigang yang School of Materials Science and Engineering Tsinghua University Suzhou Nuclear Power Research Institute

A 304 stainless steel with the addition of 0.27 wt% Ag was found to exhibit excellent antibacterial properties. Based on Thermo-Calc calculation, a special heat treatment was introduced to obtain Ag precipitate in this steel. Anti- bacterial experiments show that the alloy can kill the adhering Escherichia coli effectively. Since the Ag element plays a key role in killing the adhered bacteria, microstructures of Ag and Ag-rich compounds were characterized by scanning electron microscopy and transmission electron microscopy. Ag-rich compounds with the size of a few microns were found to be embedded within the matrix and along grain boundaries, Moreover, pure Ag particles with a lattice parameter of 0.422 nm were found within the austenite matrix. The orientation relationship between the matrix and Ag particles was identified. Nano-sized Ag particles were precipitated during heat treatment, and the interfacial energy between Ag precipitates and matrix was determined by Becket＇s model calculation.

关键词： 304 Stainless steel Ag addition Precipitation Antibacterial property

Lee–yang zeros in the Rydberg atoms

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Frontiers of physics 2023年第2期18卷 197-204页

作者： Chengshu Li fan yang Institute for Advanced Study Tsinghua UniversityBeijing 100084China

Lee–yang (LY) zeros play a fundamental role in the formulation of statistical physics in terms of (grand) partition functions, and assume theoretical significance for the phenomenon of phase transitions. In this paper, motivated by recent progress in cold Rydberg atom experiments, we explore the LY zeros in classical Rydberg blockade models. We find that the distribution of zeros of partition functions for these models in one dimension (1d) can be obtained analytically. We prove that all the LY zeros are real and negative for such models with arbitrary blockade radii. Therefore, no phase transitions happen in 1d classical Rydberg chains. We investigate how the zeros redistribute as one interpolates between different blockade radii. We also discuss possible experimental measurements of these zeros.

关键词： Lee-yang zeros Rydberg atom statistical mechanics

Fast TMRM:efficient multi-task recommendation model

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The Journal of China Universities of Posts and Telecommunications 2020年第5期27卷 13-22页

作者： Zhu fan yang Juan School of Computer Science and Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

An improved multi-task learning recommendation algorithm-fast two-stage multi-task recommendation model boosted feature selection(Fast TMRM) is proposed based on auto-encoders in this paper. Compared to previous work, Fast TMRM improves the convergence speed and accuracy of training. In addition, Fast TMRM builds on previous work to introduce the auto-encoder to encode the important feature combination vector. That is how it can be used for the training of multi-task learning, which helps to improve the training efficiency of the model by nearly 67%. Finally, the nearest neighbor search is used to restore important feature expression.

关键词： recommendation algorithm feature combination auto-encoder