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SVM-based Ontology Matching Approach

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International Journal of Automation and computing 2012年第3期9卷 306-314页

作者： Liu, lei yang, feng Zhang, peng Wu, Jing-Yi Hu, Liang College of Computer Science and Technology Jilin University Changchun 130012 China Department of Information Jilin Teachers' Institute of Engineering and Technology Changchun 130052 China

There are a lot of heterogeneous ontologies in semantic web, and the task of ontology mapping is to find their semantic relationship. There are integrated methods that only simply combine the similarity values which are used in current multi-strategy ontology mapping. The semantic information is not included in them and a lot of manual intervention is also needed, so it leads to that some factual mapping relations are missed. Addressing this issue, the work presented in this paper puts forward an ontology matching approach, which uses multi-strategy mapping technique to carry on similarity iterative computation and explores both linguistic and structural similarity. Our approach takes different similarities into one whole, as a similarity cube. By cutting operation, similarity vectors are obtained, which form the similarity space, and by this way, mapping discovery can be converted into binary classification. Support vector machine (SVM) has good generalization ability and can obtain best compromise between complexity of model and learning capability when solving small samples and the nonlinear problem. Because of the said reason, we employ SVM in our approach. For making full use of the information of ontology, our implementation and experimental results used a common dataset to demonstrate the effectiveness of the mapping approach. It ensures the recall ration while improving the quality of mapping results.

关键词： Semantic web ontology engineering ontology mapping similarity cube support vector machine (SVM).

Bi-functional particles for integrated thermo-chemical processes:Catalysis and beyond

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Particuology 2021年第3期19卷 10-32页

作者： Hanke Li Chengxiong Dang Guangxing yang Yonghai Cao Hongjuan Wang feng peng Hao yu State Key Laboratory of Pulp and Paper Engineering School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China

Particulate materials possessing dual functionalities have received tremendous investigations in many fields,owing to their superiority over mono-functional counterparts and their potential for process integration and *** review focuses on bi-functional catalytic particles which also serve as sorbents/adsorbents or heat suppliers in the scheme of various thermo-chemical processes,enabling inherent separation or energy conservation within single-step ***-functional particles applied for integration of reaction and separation including sorption-enhanced hydrogen production and integrated capture and catalytic conversion processes are reviewed in detail,providing insights into material design and key performance *** the other hand,bi-functional particles applied for integration of reaction and non-thermal radiation heating,including electrothermal and photothermal assisted heterogeneously catalyzed reactions,are also reviewed,with emphasis on the material property and energy efficiency *** bi-functional particles show broad adaptability and feasibility in various reactions operated in integrated and intensified schemes,affording huge potentials for further improving productivity and efficiency in thermo-chemical processes.

关键词： Bi-functional particles Thermo-chemical processes Catalysis Separation Energy conservation Process integration and intensification

Reaction dynamics of proton-rich nuclei at energies around the Coulomb barrier:the cases of^(7)Be,^(8)B,and^(17)F

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Nuclear Science and Techniques 2024年第12期35卷 239-254页

作者： Tian‑peng Luo lei yang Cheng‑Jian Lin Nan‑Ru Ma Pei‑Wei Wen Hui‑Ming Jia feng yang China Institute of Atomic Energy Beijing 102413China

The exploration of reaction dynamics,particularly the breakup and fusion mechanisms of proton drip-line nuclei at energies around the Coulomb barrier,is crucial in the feld of nuclear *** study reviews experimental investigations on the reactions induced by proton-rich nuclei,^(7)Be,^(8)B,and^(17)F,including elastic scattering and direct and fusion reactions at the near-barrier *** particular,we briefy introduce complete kinematic measurements of^(8)B+^(120)Sn and^(17)F+^(58)Ni at the energies of *** reaction dynamics are observed for proton-rich nuclei compared with neutron-rich nuclei.

关键词： Proton-rich nuclei Energies around the Coulomb barrier Elastic scattering Breakup reactions Fusion reactions

Effect of cooling rate on morphology and type of vanadium-containing phases in Al-10V master alloy

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China Foundry 2019年第5期16卷 300-306页

作者： Qing-feng Zhu Yi Meng Yan-lei Kang Shu-ping Kong yang-peng Ou yu-bo Zuo Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang 110819 China School of Materials Science and Engineering Northeastern University Shenyang 110819 China School of Mechanical and Materials Engineering North China University of Technology Beijing 100144 China

Effects of cooling rates on the morphology, sizes and species of primary vanadium-containing phases in Al-10V master alloys were investigated. The results show that the primary vanadium-containing phases with different morphologies and compositions present in Al-10V master alloys at different cooling rates with the pouring temperature of 1,170 °C. When the Al-10V master alloy is solidified in the refractory mold at a cooling rate of 2 °C·s-1, the vanadium-containing phases are mainly plate-like Al10V phases, with the average size of 100.0 μm in the center and 93.2 μm at the edge of the ingot. When the master alloy is solidified in the graphite mold at a cooling rate of 24.3 °C·s-1, the primary vanadium-containing phases are dendritic Al3V phases, with the average length of 297.0 μm for the first dendrite in the center and 275.0 μm at the edge of the ingot. The secondary dendrite arm spacing (SDAS) is 9.5 μm in the center and 9.3 μm at the edge of the ingot, respectively. When the solidification is carried out in the copper mould at a cooling rate of 45.7 °C·s-1, the primary vanadium-containing phases are also Al3V phases but with smaller size, compared with that prepared at the cooling rate of 24.3 °C·s-1. As a result, the average length is 190.0 μm for the first dendrite in the center and 150.0 μm at the edge of the ingot. The SDAS is 9.8 μm in the center and 4.4 μm at the edge of the ingot, respectively.

关键词： Al-V master alloy cooling rate vanadium-containing phase solidification

Noble-metal-based high-entropy-alloy nanoparticles for electrocatalysis

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Journal of Energy Chemistry 2022年第5期31卷 721-751页

作者： Xianfeng Huang Guangxing yang Shuang Li Hongjuan Wang Yonghai Cao feng peng Hao yu School of Biology and Biological Engineering South China University of TechnologyGuangzhou 510006GuangdongChina School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510641GuangdongChina School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006GuangdongChina

Since the two seminal papers were published independently in 2004, high-entropy-alloys(HEAs) have been applied to structural and functional materials due to the enhanced mechanical properties, thermal stability, and electrical conductivity. In recent years, HEA nanoparticles(HEA-NPs) were paid much attention to in the field of catalysis for the promoted catalytic activity. Furthermore, the various ratios among the metal components and tunable bulk and surface structures enable HEAs have big room to enhance the catalytic performance. Especially, noble-metal-based HEAs displayed significantly improved performance in electrocatalysis, where the ‘core effects’ were employed to explain the superior catalytic activity. However, it is insufficient to understand the essential mechanism or further guide the design of electrocatalysts. Structure–property relationship should be disclosed for the catalysis on HEA-NPs to accelerate the process of seeking high effective and efficient electrocatalysts. Therefore, we summarized the recent advances of noble-metal-based HEA-NPs applied to electrocatalysis, such as hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, methanol oxidation reaction, ethanol oxidation reaction, formic acid oxidation reaction, hydrogen oxidation reaction, carbon dioxide reduction reaction and nitrogen reduction reaction. For each electrocatalytic reaction, the reaction mechanism and catalyst structure were presented, and then the structure–property relationship was elaborated. The review begins with the development, concept, four ‘core effect’ and synthesis methods of HEAs. Next,the electrocatalytic reactions on noble-metal-based HEA-NPs are summarized and discussed independently. Lastly, the main views and difficulties pertaining to structure–property relationship for HEAs are discussed.

关键词： Noble-metal-based High-entropy-alloy Nanoparticles ‘Core effects’ Structure–property relationship Electrocatalysis

Syngas production by dry reforming of the mixture of glycerol and ethanol with CaCO3

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Journal of Energy Chemistry 2020年第4期29卷 90-97页

作者： Chengxiong Dang Shijie Wu Guangxing yang Yonghai Cao Hongjuan Wang feng peng Hao yu School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006GuangdongChina School of Chemistry and Chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product TechnologySouth China University of TechnologyGuangzhou 510640GuangdongChina

The reduction of CO2 emission is crucial for the mitigation of climate change.A considerable amount of industrial CO2 can be absorbed in the form of carbonates through high-temperature sorption *** this regard,the efficient conversion of carbonates to value-added products will provide an economically viable method for the sustainable usage of carbon ***,we report a promising solution involving the use of a glycerol and ethanol mixture as a hydrogen donor in the dry reforming process with CaCO3 to produce syngas.A series of metal active components,including Ni,Fe,Co,Cu,Pt,Pd,Ru,and Rh,was used to promote this *** showed comparable performance with that of Pd,but outperformed Co,Fe,Cu,Rh,Ru,and *** 100%conversion of glycerol and ethanol,~92%selectivity of synthesis gas(H2 and CO),and a H2/CO ratio of^1.2 were achieved over CaCO3 containing10 wt%Ni(10Ni-CaCO3).Meanwhile,the CO2 concentration was less than 5 vol%,indicating that most of the CO2 captured by the carbonate can be transformed into chemicals;however,they cannot simply be *** CO2 released from the decomposition of CaCO3 not only adjusted the ratio of H2 to CO but also eliminated cokes to guarantee the CO2 absorption-conversion cyclic stability in the absence of steam and at high temperatures.

关键词： Glycerol Ethanol CaCO3 Dry reforming Syngas

Hydrogen production via autothermal reforming of ethanol over noble metal catalysts supported on oxides

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Journal of Natural Gas Chemistry 2009年第2期18卷 191-198页

作者： Hongqing Chen Hao yu Yong Tang Minqiang Pan Guangxing yang feng peng Hongjuan Wang Jian yang School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 Guangdong China School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 Guangdong China

Hydrogen was produced over noble metal（Ir, Ru, Rh, Pd） catalysts supported on various oxides, including γ-Al2O3, CeO2, ZrO2 and La2O3, via the autothermal reforming reaction of ethanol （ATRE） and oxidative reforming reaction of ethanol （OSRE）. The conversion of ethanol and selectivites for hydrogen and byproducts such as methane, ethylene and acetaldehyde were studied. It was found that lanthana alone possessed considerable activity for the ATRE reaction, which could be used as a functional support for ATRE catalysts. It was demonstrated that Ir/La2O3 prevented the formation of methane, and Rh/La2O3 encumbered the production of ethylene and acetaldehyde. ATRE reaction was carried out over La2O3-supported catalysts （Ir/La2O3） with good stability on stream, high conversion, and excellent hydrogen selectivity approaching thermodynamic limit under autothermal condition. Typically, 3.4H2 molecules can be extracted from a pair of ethanol and water molecules over Ir（5wt%）/La2O3. The results presented in this paper indicate that Ir/La2O3 can be used as a promising catalyst for hydrogen production via ATRE reaction from renewable ethanol.

关键词： autothermal reforming ethanol hydrogen production iridium lanthanum oxide

UV-Vis-NIR Light-deformable Shape-memory Polyurethane Doped with Liquid-crystal Mixture and GO towards Biomimetic Applications

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Chinese Journal of Polymer Science 2022年第2期40卷 166-174页

作者： peng Zhang feng Cai Guo-Jie Wang Hai-feng yu School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Institute of New Structural Materials School of Materials Science and Engineeringand Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationPeking UniversityBeijing 100871China

Nature has been inspiring material researchers to fabricate biomimetic functional devices for various applications, and shape-memory polymer materials(SMPMs) have received tremendous attention since the promising intelligent materials possess more advantages over others for the fabrication of biomimetic functional devices. As is well-known, SMPMs can be stimulated by heat, electricity, magnetism, pH, solvent and light. From the viewpoint of practical applications, ultraviolet(UV)-visible(Vis)-near infrared(NIR) light-responsive SMPMs are undoubtedly more advantageous. However, up to now, UV-Vis-NIR light-deformable SMPMs by combining photothermal and photochemical effects are still rarely reported. Here we designed a UV-Vis-NIR light-deformable SMP composite film via incorporating a liquid crystal(LC) mixture and graphene oxide(GO) into a shape-memory polyurethane matrix. The elongated composite films exhibited interesting photomechanical bending deformations with different light-triggered mechanisms,(1) photochemically induced LC phase transition upon UV exposure,(2) photochemically and photothermally induced LC phase transition upon visible-light irradiation,(3) photothermally triggered LC phase transition and partial stress relaxation upon low-intensity NIR exposure. All the deformed objects could recover to their original shapes by high-intensity NIR ***, the biomimetic circadian rhythms of acacia leaves and the biomimetic bending/spreading of fingers were successfully achieved, which could blaze a way in the field of biomimetic functional devices due to the excellent light-deformable and shape-memory properties of the SMP composite films.

关键词： UV-Vis-NIR Light-deformable Shape-memory Liquid-crystal Biomimetic functional device

Kinetics and thermal stability of the Ni_(62)Nb_(38–x)Ta_x(x=5, 10, 15,20 and 25) bulk metallic glasses

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Science China(Physics,Mechanics & Astronomy) 2017年第7期60卷 70-75页

作者： MengKe He Yi Zhang lei Xia peng yu College of Physics and Electronic Engineering Chongqing Normal University School of Communication & Information Engineering University of Electronic Science and Technology of China

We studied thermal stability and its relationship to the glass-forming ability （GFA） of the Ni62Nb38-xTax （x=5, 10, 15, 20, 25） bulk metallic glasses （BMG） fi＇om a kinetic point of view. By fitting the heating-rate dependence of glass transition temperature （Tgonsct） and crystallization temperatures （Txonset and Txpcak） of the Ni62Nb38_xTax BMG using the Vogel-Fulcher-Tammann （VFT） equation, we obtained the ideal glass transition and crystallization temperatures （Tg0 and Tx2） and the fragility parameter （m）, and also constructed continuous heating transition （CHT） diagrams for crystallization of the BMG. The CHT diagrams of the BMG indicate enhanced thermal stability by Ta addition; the Tg~ as well as the Tx~ also illustrates this improved stability limit. The compositional dependence of m, which agrees well with that of the reduced glass-transition temperature, indicates a strong correlation between liquid fragility and glass-forming ability in the present alloy system. These results provide new evidence for understanding thermal stability, liquid fragility, and GFA in BMG.

关键词： bulk metallic glasses thermal stability kinetics glass-forming ability