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Formation process of akaganeite in the simulated wet-dry cycles atmospheric environment

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Journal of Materials Science & Technology 2018年第8期34卷 1387-1396页

作者： Haigang Xiao Wei Ye xiaoping song Yuantai Ma Ying Li Laboratory for Corrosion and Protection Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China University of ChineseAcademy of Sciences Beijing 100049China Analysis and Testing Department(Testing Center) Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

In order to clarify the formation mechanism and conditions for akaganeite in long-term exposure, the influence of the former corrosion results on akaganeite formation was investigated by simulated experi- ments in laboratory. The combination of XRD, FTIR, SEM and EPMA enabled the identification of the rust layer formed on the surface. Accordingly, the nature of the rust layer and the amount of the corrosive species in the rust layer varied with the extension of the exposure. Among them, comparing with the corrosion condition in initial stage, the structure of rust layer after repeated wet-dry cycles was disad- vantage for akaganeite formation. Element CI aggregated at the interface between rust and substrate in the thick part can participate in the formation of akaganeite after the rust layer covered removed. The accumulation effect of salt deposited contributed to akaganeite formation under the condition that salt deposition rate was relatively low.

关键词： Carbon steel Atmospheric corrosion Corrosion products Chloride ions

Model Predictive Yaw Control Using Fuzzy-Deduced Weighting Factor for Large-Scale Wind Turbines

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Energy Engineering 2021年第2期118卷 237-250页

作者： Shuowang Zhang Lingxiang Huang Dongran song Ke Xu Xuebing Yang xiaoping song XEMC Wind power Co. Ltd.Xiangtan411100China School of Automation Central South UniversityChangsha410083China

Yaw control system plays an important role in helping large-scale horizontal wind turbines capture the wind *** track the stochastic and fast-changing wind direction,the nacelle is rotated by the yaw control ***,a difficulty consists in the variation speed of the wind direction much faster than the rotation speed of the *** deal with this difficulty,model predictive control has been recently proposed in the literature,in which the previewed wind direction is employed into the predictive model,and the estimated captured energy and yaw actuator usage are two contradictive *** the performance of the model predictive control strat-egy relies largely on the weighting factor that is designed to balance the two objectives,the weighting factor should be carefully *** this study,a fuzzy-deduced scheme is proposed to derive the weighting factor of the mod-el predictive yaw *** the proposed fuzzy-deduced strategy,the variation degree and the increment of the wind direction during the predictive horizon are used as the inputs,and the weighting factor is the output,which is dynamically *** proposed model predictive yaw control is demonstrated by some simulations using real wind data and its performance is compared with the conventional model predictive control with thefixed weighting *** results confirm the outweighing performance of the proposed control strategy over the conventional one.

关键词： Wind turbine yaw control weighting factor fuzzy logic control

Target-directed isolation and identification of a serum lectin from lamprey (Lampetra japonica) by chromatographys and MALDI-TOF/TOF

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Acta Oceanologica Sinica 2018年第5期37卷 113-116页

作者： HAN Yinglun GOU Meng song xiaoping song Tao SHI Biyue PANG Yue LI Qingwei College of Life Science Liaoning Normal University Dalian 116029 China Lamprey Research Center Liaoning Normal University Dalian 116029 China Affiliated Zhongshan Hospital of Dalian University Dalian 116001 China

A 105-k Da polymer lectin was purified from lamprey（Lampetra japonica） serum by chromatography methods including cation ion-exchange chromatography with a SP-Sepharose TM XL column and size exclusion chromatography with a Superdex 200 column. The target fractions were collected according to the direction of hemagglutinating activity. The results revealed that the active fractions could adsorb on SP-Sepharose column and showed a 280 nm UV absorbance peak corresponding to molecular weights of 105 k Da in the following size exclusion chromatography. The target fractions with hemagglutinating activity were further checked by NativePAGE and SDS-PAGE. Two single bands at around 105 k Da and 35 k Da were displayed by two electrophoresis methods respectively, indicating that the protein exists as a trimer in solution. After Native-PAGE and SDS-PAGE,two bands were excised from the gels respectively and further identified by MALDI-TOF/TOF as serum lectin（gi：13094239）. The lectin was able to agglutinate rabbit red blood cells（RRBCs） and sheep red blood cells（SRBCs） in vitro. The lectin isolated from lamprey serum in the current study might be helpful for deeply understanding the innate immune molecules dependent immune defence in jawless vertebrates which have been proved recently that they possess a lymphocyte-based system of anticipatory immunity with variable lymphocyte receptors as mediators.

关键词： Lampetra japonica lectin purification identification MALDI-TOF/TOF

Lithium-assisted exfoliation of pristine graphite for few-layer graphene nanosheets

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Nano Research 2015年第3期8卷 801-807页

作者： Minwei Xu Huiting Sun Cai Shen Sen Yang Wenxiu Que Yin Zhang xiaoping song MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an 710049 China Electronic Materials Research Laboratory International Center for Dielectric Research Xi'an Jiaotong University Xi'an 710049 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Materials Science and Engineering Tongji University Shanghai 201804 China

A lithium-assisted approach has been developed for the exfoliation of pristine graphite, which allows the large-scale preparation of few-layer graphene nanosheets. The process involves an unexpected physical insertion and exfoliafion, and the graphene nanosheets prepared by this method reveal undisturbed sp2-hybridized structures. A possible two-step mechanism, which involves the negative charge being trapped around the edges of the graphite layers and a subsequent lithiation process, is proposed to explain the insertion of lithium inside the graphite interlayers. If necessary, the present exfoliation can be repeated and thinner （single or 2-3 layer） graphene can be achieved on a large scale. This simple process provides an efficient process for the exfoliation of pristine graphite, which might promote the future applications of graphene.

关键词： graphene few-layer lithium Intercalation exfoliation

Nornicotine-typed insecticides:The potential insecticides with strong activity against Diaphorina citri

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Advanced Agrochem

Advanced Agrochem 2023年第2期2卷 180-184页

作者： Pengfei Hu xiaoping Ye xiaoping song Mingxin Yang Yunsheng Zhong Yijing Cen Yanxin Zhang Yiming song Qingchao Liu College of Chemical Engineering Department of Pharmaceutical EngineeringNorthwest University229 Taibai North RoadXi'an710069China Laboratory of Insect Ecology South China Agricultural UniversityGuangzhouChina Glycobiology and Glycotechnology Research Center College of Food Science and TechnologyNorthwest University229 Taibai North RoadXi'an710069China College of Life Sciences Northwest University229 Taibai North RoadXi'an710069China

Nicotine and nornicotine-typed compounds are well-known for its potential as *** researches have shown that nicotine was highly toxic to Diaphorina citri Kuwayama,an invasive and fast spreading *** we report the effects of nornicotine-typed insecticide against *** compounds A1-A8,B1-B28,C1-C18 and D1-D12 were synthesized by reported *** bioassays indicated that some of these compounds exhibited good effects against *** B2,B3,B8,B12,B13,B22,C5,C7,D5,and D9 exhibited the mortality up to 100%within 120 h in 50 mg/*** further data shows that A2-5,A7,B1,B8,B20 and B22 showed rapid insecticidal activities against *** in 24 h with the low LC_(50)(LC_(50)<50 mg/L in 24 h,and LC_(50)<30 mg/L in 72 h).Nornicotine-typed derivatives exhibited activity against ***,and B8 and B22 exhibited the best insecticidal activity with an LC_(50)of 18.01.0,18.20.9 mg/L in 24 h,which had the lower cost than nicotine and showed the potential as powerful insecticides.

关键词： Nornicotine-typed compounds Nicotine Insecticide Diaphorina citri Kuwayama Synthesis

Cardiac-Adaptive Conductive Hydrogel Patch Enabling Construction of Mechanical–Electrical Anisotropic Microenvironment for Heart Repair

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Research 2024年第1期2023卷 489-507页

作者： xiaoping song Jifeng Zhang Si Shen Dan Liu Jie Zhang Wenming Yin Genlan Ye Leyu Wang Liu Cai Honghao Hou Xiaozhong Qiu Central Laboratory The Fifth Affiliated HospitalSouthern Medical UniversityGuangzhouGuangdong 510910China Department of Anatomy Neuroscience Laboratory for Cognitive and Developmental DisordersMedical College of Jinan UniversityGuangzhou 510630China Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering School of Basic Medical ScienceBiomaterials Research CenterSchool of Biomedical EngineeringSouthern Medical UniversityGuangzhouGuangdong 510515China

The biomimetic construction of a microstructural–mechanical–electrical anisotropic microenvironment adaptive to the native cardiac tissue is essential to repair myocardial infarction(MI).Inspired by the 3D anisotropic characteristic of the natural fish swim bladder(FSB),a novel flexible,anisotropic,and conductive hydrogel was developed for tissue-specific adaptation to the anisotropic structural,conductive,and mechanical features of the native cardiac extracellular *** results revealed that the originally stiff,homogeneous FSB film was tailored to a highly flexible anisotropic hydrogel,enabling its potential as a functional engineered cardiac patch(ECP).In vitro and in vivo experiments demonstrated the enhanced electrophysiological activity,maturation,elongation,and orientation of cardiomyocytes(CMs),and marked MI repair performance with reduced CM apoptosis and myocardial fibrosis,thereby promoting cell retention,myogenesis,and vascularization,as well as improving electrical *** findings offer a potential strategy for functional ECP and provides a novel strategy to bionically simulate the complex cardiac repair environment.

关键词： bladder thereby patch

欲望、货币和现代都市空间——重读施蛰存的《春阳》

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文艺理论研究 2015年第4期35卷 102-110页

作者：宋晓萍对外经济贸易大学中文学院

本文以施蛰存的小说《春阳》为例,一方面探讨女性闲逛者在现代都市空间中的独特体验,以及传统小城镇和现代都市两种空间的异质性如何具体呈现为女性身体的诸种症候;另一方面分析都市消费景观和"观看"对女性欲望的撩拨,以及伴随着消费的... 详细信息

本文以施蛰存的小说《春阳》为例,一方面探讨女性闲逛者在现代都市空间中的独特体验,以及传统小城镇和现代都市两种空间的异质性如何具体呈现为女性身体的诸种症候;另一方面分析都市消费景观和"观看"对女性欲望的撩拨,以及伴随着消费的货币如何建构/解构女性"白日梦"的过程。

关键词：女性现代都市空间货币欲望

EFFECT OF Nb ADDITION ON MICROSTRUCTURE OF(Nd,Dy)-(Fe,Co)-B MAGNETS

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Acta Metallurgica Sinica(English Letters) 1992年第8期5卷 123-127页

作者： song xiaoping WANG Xiaotian HUANG Qihua LIU Junhai YAO Yinliang Xi’an Jiaotong University,Xi’an,China

An addition of Nb up to 2 at.-% into(Nd,Dy)-(Fe,Co)-B alloy causes the formation of dendrite Fe_2Nb and the precipitates in hard magnetic *** increases with increasing Nb *** sintering,part of Fe_2Nb dissolves within the 2:14:1 grains, and the Fe_2Nb along grain boundaries hinders the growth of 2:14:1 *** an- nealing,the dissolved Nb in(?)-phase precipitates out,and this nearby the grain boundary diffuses into Nd-rich phase to form new granular Fe_2Nb and to increase the Nb content in Nd-rich phase,this results in a precipitate-free zone in the(?)-grain near Nd-rich phase.

关键词： NdFeB rare earth permanent magnet microstructure

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不同基体SmCo颗粒膜的组织和磁性

材料研究学报 2005年第1期19卷 90-93页

作者：祝要民宋晓平西安交通大学西安交通大学理学院教授西安市710049

用磁控溅射方法制备了Cu,Mo和Al基体的SmCo颗粒薄膜.用能谱EDAX,透射电镜TEM和振动样品磁强计VSM分别表征和测量了薄膜的结构和磁性能.结果表明,Cu基体溅射态已晶化而Mo和Al溅射态为非晶态,在500℃回火30 min后磁性相的析出特性有一定差... 详细信息

用磁控溅射方法制备了Cu,Mo和Al基体的SmCo颗粒薄膜.用能谱EDAX,透射电镜TEM和振动样品磁强计VSM分别表征和测量了薄膜的结构和磁性能.结果表明,Cu基体溅射态已晶化而Mo和Al溅射态为非晶态,在500℃回火30 min后磁性相的析出特性有一定差异.对溅射的SmCo薄膜在500℃回火30 min后,Cu基体的SmCo薄膜磁性能较好,并有一定的磁各向异性,其原因是Cu在SmCo晶界的聚集对晶粒有钉扎作用.

关键词：金属材料 SmCo颗粒薄膜磁性能