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Chinese Journal of Chemistry 2016年第9期34卷 878-886页

作者： wei Chen Munil Sin ping-jie wei Qian-Ling Zhang Jin-Gang Liu Department of Chemistry East China University of Science and Technology Shanghai 200237 China Shenzhen Key Laboratory of Functional Polymer College of Chemistry and Environmental Engineering Shenzhen University Shenzhen Guangdong 518060 China

As alternatives to Pt-based electrocatalysts, the development of nonprecious metal catalysts with high performance in the cathodic oxygen reduction reaction （ORR） is highly desirable for widespread use in fuel cells. Here we report a simple approach for preparing pentabasic （Fe, B, N, S, P）-doped reduced graphene oxide （rGO） via a two-step doping method of adding boric acid and ferric chloride to ternary （N, S, P）-doped rGO （NSPG）. Electro- chemical investigation of the composites for the ORR revealed that simultaneously doping appropriate amounts of Fe and B into the NSPG produced a synergistic effect that endowed the prepared catalyst with both a positively shifted ORR half-wave potential and high selectivity for the 4e^-reduction of O2. The optimized Fe2B-NSPG catalyst approached a 4e^- process for the ORR with a half-wave potential （E1/2=0.90 V vs. RHE） even 30 mV higher than that of the commercial Pt/C catalyst in alkaline solution. Furthermore, relative to the Pt/C catalyst, the Fe2B-NSPG demonstrated superior stability and excellent tolerance of the methanol cross-over effect. This simple method afforded pentabasic （Fe, B, N, S, P）-doped rGO as a promising nonpreeious metal catalyst used for alkaline fuel cells.

关键词： oxygen reduction reaction reduced graphene oxide multiple dopant electrocatalysis

Synthesis of Hydroxystilbene Derivatives and their Antioxidant Activity by DPPH Method

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Chemical Research in Chinese Universities 2006年第6期22卷 742-746页

作者： LI Yue-qing SONG Qi-ling CHEN ping-ping ZHAO wei-jie WANG Shi-sheng State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116012 P. R. China

Five hydroxystilbene derivatives were synthesized and their structures were determined using high-resolution mass spectrometry, ^1H NMB, and IR. In this study, the antioxidant activities of eight hydroxystilbenes （five synthesized hydroxystilbene derivatives and three other compounds） were evaluated with the free radiced scavenging model 1,1-diphenyl-2-picrylhydraxyl. It was observed that there exists a very significant linear rehtionship between the reciprocal of the EC50 value of each of the compounds and the maximum wavelength of the ultraviolet absorption peaks, It is believed that this result will be helpful for the further synthesis of such antioxidants.

关键词： Polyhydroxystilbene Antioxidant activity 1,1-Diphenyl-2-picrylhydrazyl (DPPH)

Monitor of Polymerization of Inverse Microemulsions Containing Methyl Methacrylate and Acrylic Acid

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Chinese Chemical Letters 2006年第2期17卷 247-250页

作者： Xiao LI Sheng ping XIA wei jie ZENG wei Ying ZHANG Sheng Xiong DONG College of Chemistry and Chemical Engineering FuzhouUniversity Fuzhou350002

The polymerization of the inverse microemulsions composed of methyl methacrylate,acrylic acid, sodium dodecyl sulfate and water was monitored by refractometer, conductometer and time-resolved light scattering device. The results showed that refractive index, conductivity or intensity distribution of scattered light changed along with polymerization, and different processes of polymerization could be identified.

关键词： Polymerization monitoring inverse microemulsion methyl methacrylate.

Growth, Mechanical and Thermal Properties of Bi4SiaO12 Single Crystals

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Chinese Physics Letters 2012年第7期29卷 203-206页

作者： SHEN Hui XU Jia-Yue ping wei-jie HE Qing-Bo ZHANG Yan JIN Min JIANG Guo-Jian School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai 201418

Bi4Si3O12 (BSO) is an excellent scintillation crystal,and is becoming the desirable candidate for dual-readout calorimeters in high-energy *** this work,high quality BSO crystals are successfully grown by the modified Bridgman *** the first time,its mechanical and thermal properties are investigated and compared with those of the famous scintillation crystal Bi4 Ge3O12 (BGO).The Vickers hardness and fracture toughness of BSO crystal are higher than those of BGO *** specific heat,thermal diffusivity and thermal conductivity are measured to be 0.319 J·g^(-1) K^(-1),1.54mm2.s^(-1) and 3.29 W·m^(-1) K^(-1) at 298K,*** average thermal expansion coeffcient is calculated to be 7.07 × 10^(-6) K^(-1) from 300 to *** with BGO crystal,BSO crystal possesses larger specific heat,thermal conductivity and smaller thermal *** results indicate that BSO crystals possess better mechanical and thermal properties,which will benefit its practical applications.

关键词： toughness fracture thermal

Clinicopathologic analysis of oral squamous cell carcinoma after 125I interstitial brachytherapy

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Clinicopathologic analysis of oral squamous cell carcinoma a...

Acute and chronic excitotoxicity in ischemic stroke and late-onset Alzheimer's disease

2018口腔病理年会暨第十二次全国口腔病理学术会议

作者： wei-ping jie Yan-ting Chi Bin-bin Li Department of Oral Pathology Peking University School and Hospital of Stomatology

【Abstract】Oral squamous cell carcinoma (OSCC) is a common malignancy in the head and neck *** after radical surgery has achieved much progress as a cancer adjuvant *** study focused on the pathologic characteristics of the OSCC patients who underwent seed implantation after radical surgery, and the relationship of these characteristics with prognosis.

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Neural Regeneration Research 2025年第7期20卷 1981-1988页

作者： Shan ping Yu Emily Choi Michael QJiang Ling wei Department of Anesthesiology Emory University School of MedicineAtlantaGAUSA Center for Visual and Neurocognitive Rehabilitation Atlanta Veterans Affairs Medical CenterDecaturGAUSA

Stroke and Alzheimer's disease are common neurological disorders and often occur in the same *** comorbidity of the two neurological disorders represents a grave health threat to older *** review presents a brief background of the development of novel concepts and their clinical *** activity of glutamatergic N-methyl-D-aspartate receptors and N-methyl-D-aspartate receptor-mediated Ca^(2+)influx is critical for neuronal *** ischemic insult induces prompt and excessive glutamate release and drastic increases of intracellular Ca^(2+)mainly via N-methyl-D-aspartate receptors,particularly of those at the extrasynaptic *** Ca^(2+)-evoked neuronal cell death in the ischemic core is dominated by necrosis within a few hours and days known as acute ***,mild but sustained Ca^(2+)increases under neurodegenerative conditions such as in the distant penumbra of the ischemic brain and early stages of Alzheimer's disease are not immediately toxic,but gradually set off deteriorating Ca^(2+)-dependent signals and neuronal cell loss mostly because of activation of programmed cell death *** on the Ca^(2+)hypothesis of Alzheimer's disease and recent advances,this Ca^(2+)-activated“silent”degenerative excitotoxicity evolves from years to decades and is recognized as a unique slow and chronic *** N-methyl-D-aspartate receptor subunit GluN3A,primarily at the extrasynaptic site,serves as a gatekeeper for the N-methyl-D-aspartate receptor activity and is neuroprotective against both acute and chronic *** stroke and Alzheimer's disease,therefore,share an N-methyl-D-aspartate receptor-and Ca^(2+)-mediated mechanism,although with much different time *** is thus proposed that early interventions to control Ca^(2+)homeostasis at the preclinical stage are pivotal for individuals who are susceptible to sporadic late-onset Alzheimer's disease and Alzheimer's disease-related

关键词： Ca^(2+)hypothesis cognitive deficits hyperactivity late-onset Alzheimer's disease neurodegeneration N-methyl-D-aspartate receptors N-methyl-D-aspartate receptor subunits pathogenesis preventive treatment

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： jie Wang wei Wang Xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

Bio-inspired Iron Porphyrins as Electrocatalysts for the Oxygen Reduction Reaction in Fuel Cells

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Bio-inspired Iron Porphyrins as Electrocatalysts for the Oxy...

Bio-inspired Electrocatalysts for Oxygen Reduction Reaction in Fuel cells

全国第十八届大环化学暨第十届超分子化学学术讨论会

作者： ping-jie wei Guo-Qiang Yu Fei-Fei Wang Ye-Min Zhao Jin-Gang Liu School of Chemistry and Molecular Engineering East China University of Science and Technology

＜正＞The oxygen reduction reaction（ORR）is one of the most important reactions in both life processes and energy conversion systems such as fuel cells.1 The sluggish nature of ORR kinetics at the cathode is one of the key barriers for H2–O2（air）polymer electrolyte membrane（PEM）fuel *** noble platinum（Pt）-based catalysts are predominantly used as the ORR catalysts in low-temperature fuel *** to its

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Bio-inspired Electrocatalysts for Oxygen Reduction Reaction ...

中国化学会第五届卟啉与酞菁学术研讨会

作者： Jin-Gang Liu ping-jie wei Guo-Qiang Yu Fei-Fei Wang Ye-Min Zhao Department of Chemistry East China University of Science and Technology

The oxygen reduction reaction(ORR),one of the most important reactions in life processes as well,has been regarded as a major bottleneck that limits fuel cell performance due to the sluggish cathodic reaction kinetics and diverse reaction pathways. Non-precious-metal catalysts for ORR have long been intensively investigated since the discovery of the capacity of metal complexes with macrocyclic N4 ligands to reduce oxygen electrochemically. However,Non-precious-metal catalysts developed so far usually suffer from substandard performance in fuel cell acidic *** to improve the electrocatalytic activity and mitigate the performance loss with structure-defined catalysts for ORR remains a great *** on our biomimetic mechanistic studies on the binding/activating of O by metalloenzymes such as heme-containing enzymes, we have developed a method of preparing bio-inspired ORR electrocatalysts without traditional pyrolysis treatment,where electrocatalysts of iron porphyrins and copper complexes were covalently grafted onto the surface of carbon nanotubes and other carbon-based supports. This offered the feasibility to tune the catalytic activity via variation of the catalyst structure with defined reaction active *** this talk,I will present our efforts to boost the catalysts ORR performance via rational catalyst design from a bio-inspired approach,and demonstrate their application to low temperature fuel cells.

关键词： iron porphyrin copper complexes oxygen reduction electrocatalyst fuel cells

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语音倾向性分析中的特征抽取研究

计算机应用研究 2014年第12期31卷 3580-3583页

作者：魏平杰樊兴华重庆邮电大学中文信息处理研究所计算智能重庆市重点实验室重庆400065

提出将声学特征与语义特征相结合来判断语音倾向性的方法。首先从语音中分别提取语义特征及声学特征,然后将语义特征与声学特征进行组合,最后用基于SVM的两步分类方法进行训练和识别。分析和比较了常用的特征及组合,发现将语义特征与声... 详细信息

提出将声学特征与语义特征相结合来判断语音倾向性的方法。首先从语音中分别提取语义特征及声学特征,然后将语义特征与声学特征进行组合,最后用基于SVM的两步分类方法进行训练和识别。分析和比较了常用的特征及组合,发现将语义特征与声学特征结合起来后效果明显,比单独使用语义特征最高能提高3%,比单独用声学特征的识别率最高能提高14%。

关键词：倾向性分析语音倾向性声学特征语义特征