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Absorptive Nonlinearity in Er-Doped Optical Fiber

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Wuhan University Journal of Natural Sciences 1999年第2期4卷 56-59页

作者： Song, Qian Li, ji-xing Zhang, Yuan-cheng Wuhan Univ Wuhan China

Optical absorptive nonlinearity in Er doped optical fiber has been discussed and measured at the window wavelength 1.55 μm for optical communications firstly. It is proposed that the mechanism of this absorptive nonlinearity is the induced absorption. The first order nonlinear absorptive coefficient and the imaginary part and the complex value of the third order susceptibility at that wavelength are obtained from the measured absorptive nonlinearity.

关键词： optical nonlinearity Er doped fiber optical absorption

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燃料乙醇技术发展现状及建议

化学工业 2024年第3期42卷 58-61页

作者：宁艳春马迎雪伊凤岳军胡世洋孙艳红惠继星中国石油吉林石化公司研究院吉林132021

简述了燃料乙醇国内外生产技术概况,包括:以玉米为原料生产燃料乙醇的浓发酵技术,以玉米纤维生产燃料乙醇技术,以小麦、薯类和陈稻谷(糙米)等为原料生产燃料乙醇,以木质纤维素为原料生产燃料乙醇等;并针对燃料乙醇行业发展存在问题,提... 详细信息

简述了燃料乙醇国内外生产技术概况,包括:以玉米为原料生产燃料乙醇的浓发酵技术,以玉米纤维生产燃料乙醇技术,以小麦、薯类和陈稻谷(糙米)等为原料生产燃料乙醇,以木质纤维素为原料生产燃料乙醇等;并针对燃料乙醇行业发展存在问题,提出建议。

关键词：燃料乙醇国内外技术概况发展建议

农户创业与绿色生产技术采纳:来自江苏的证据

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长江流域资源与环境 2022年第10期31卷 2295-2307页

作者：吉星张红霄南京林业大学经济管理学院江苏南京210037

基于2020年对江苏省26个区县2 628个农户的微观调查数据,使用泊松内生处理效应模型(ETPR)、内生转换模型(ESR)和中介效应模型等计量手段,对农户创业影响绿色生产技术采纳的效应及作用机制进行实证检验。结果表明:(1)农户创业能显著促进... 详细信息

基于2020年对江苏省26个区县2 628个农户的微观调查数据,使用泊松内生处理效应模型(ETPR)、内生转换模型(ESR)和中介效应模型等计量手段,对农户创业影响绿色生产技术采纳的效应及作用机制进行实证检验。结果表明:(1)农户创业能显著促进农户采纳绿色生产技术,在消除内生性和选择性偏误问题后仍旧支持这一结论;(2)农户创业可通过拓展社会资本、强化风险偏好、树立环保意识、提升融资能力的中间路径促进绿色生产技术的采纳行为;(3)进一步的创业类型异质性分析证明,农业创业促进绿色生产行为的作用要比非农创业更大。鉴于此,建议基层政府加大对“双创”政策的支持,根据农户基础禀赋实施精准创业指导,帮助长期从事绿色农业生产的农户成长为家庭农场、种粮大户等新型经营主体,并建议其向外辐射绿色生产技术。同时鼓励农业创业户依托当地农技推广服务站建立绿色生产技术推广与讨论网络,带领普通农户接触和融入绿色生产网络结构。

关键词：农户创业绿色生产技术江苏创业类型

Five quinolizidine alkaloids with anti-tobacco mosaic virus activities from two species of Sophora

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Chinese Chemical Letters 2024年第6期35卷 380-384页

作者： ji Zhang Tong Zhang Qiao An Peng Zhang Cai-Yan Tian Chun-Mao Yuan Ping Yi Zhan-xing Hu Xiao-jiang Hao State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical UniversityGuiyang 550014China Natural Products Research Center of Guizhou Province Guiyang 550014China School of Pharmaceutical Sciences Guizhou Medical UniversityGuiyang 550025China School of Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of ScienceKunming 650201China Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical SciencesKunming 650201China

Three novel matrine-type alkaloids(1-3)and two unprecedented aloperine-type alkaloids(4 and 5)were isolated from the root of Sophora tonkinensis and the seeds of Sophora alopecuroides ***,compound 1 possessed an unprecedented 6/5/6 tricyclic skeleton,while compounds 2 and 3 characterized by rare 6/6/5/6 tetracyclic system and 6/6/6/6/6 pentacyclic system ***,compound 4 possessed an unprecedented 6/7/6/6 tetracyclic core,and compound 5 characterized by rare 6/6/6/6tetracyclic *** structures were elucidated by comprehensive spectroscopic data analysis and electronic circular dichroism(ECD)*** tests indicated that compound 5 displayed significant anti-tobacco mosaic virus(TMV)activity compared with the positive control ningnanmycin.

关键词： Matrine-type alkaloids Aloperine-type alkaloids Sophora tonkinensis Sophora alopecuroides Anti-tobacco mosaic virus

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漳州核电厂严重事故场外后果评价准则探讨

核动力工程 2022年第6期43卷 122-127页

作者：邢继石雪垚黄树明中国核电工程有限公司北京100840

为了对“在技术上实现减轻放射性后果的场外防护行动是有限的甚至是可以取消的”这一基本目标进行量化评价,本文从简化事故后场外应急的角度,提出了严重事故后“3 km外不需要撤离、5 km外不需要隐蔽及服碘”的设计目标。结合漳州核电厂... 详细信息

为了对“在技术上实现减轻放射性后果的场外防护行动是有限的甚至是可以取消的”这一基本目标进行量化评价,本文从简化事故后场外应急的角度,提出了严重事故后“3 km外不需要撤离、5 km外不需要隐蔽及服碘”的设计目标。结合漳州核电厂的厂址条件,推导出了一套用于漳州核电厂的严重事故后放射性后果评价准则。通过对“华龙一号”典型严重事故过程及放射性释放过程进行分析,结果表明,漳州核电厂“华龙一号”堆型满足本文提出的放射性后果评价准则,能够实现在严重事故后“3 km外不需要撤离、5 km外不需要隐蔽及服碘”的目标。

关键词：华龙一号严重事故放射性源项简化应急

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核电厂设计上实现实际消除论证方法研究

原子能科学技术 2022年第1期56卷 1-8页

作者：邢继魏玮刘静喻新利中国核电工程有限公司北京100840

《核动力厂设计安全规定》(HAF102—2016)提出必须实际消除可能导致早期放射性释放或大量放射性释放的事件序列,但国内尚缺少实际消除明确的验收准则及论证方法,本文对实际消除安全要求进行研究,提出实际消除相关技术见解、验收准则及... 详细信息

《核动力厂设计安全规定》(HAF102—2016)提出必须实际消除可能导致早期放射性释放或大量放射性释放的事件序列,但国内尚缺少实际消除明确的验收准则及论证方法,本文对实际消除安全要求进行研究,提出实际消除相关技术见解、验收准则及核电厂设计上实现实际消除的论证流程和方法,并开展华龙一号设计上实现实际消除的分析论证。分析结果表明华龙一号通过纵深防御可有效地预防和缓解设计基准事故,充分地考虑了严重事故预防与缓解措施,即使发生设计中考虑的严重事故也可保证安全壳的有效包容,设计上实现了实际消除。

关键词：实际消除大量放射性释放安全目标华龙一号

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Mechanical characteristics of soil-rock mixtures containing macropore structure based on 3D modeling technology

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Journal of Mountain Science 2020年第9期17卷 2224-2240页

作者： LIU Yong SUN Shao-rui WEI ji-hong SONG jing-lei YU Yong-xiang HE Wei ZHANG ji-xing School of Earth Science and Engineering Hohai UniversityNanjing 211100China jiangsu Province Geological Survey Institute Nanjing 210018China

Soil-rock mixtures containing macropore(SRMCM)is a kind of geological material with special mechanical *** in the project area of Lenggu hydropower station on the Yalong River,Sichuan Province,China,there is an extremely unstable Mahe talus slide with a total volume of nearly160 million cubic meters,which is mainly composed of *** study on the mechanical properties of SRMCM is of great significance for the engineering construction and safe *** this paper,laboratory tests and discrete element numerical tests based on three-dimensional scanning technology were conducted to study the influence of stone content,stone size,and the angle of the macropore structure on shear characteristics of *** failure mechanism of SRMCM was discussed from a microscopic *** work explains the internal mechanism of the influence of stone content,stone size,and the angle of the macropore structure on the strength of SRMCM through the microscopic level of stone rotation,force chain distribution,and crack *** the macropore structure that intersects with the preset shear plane at a large angle could act as a skeleton-like support to resist the shear force,the fracture of the weak cemented surface of soil and stone in the macropore structure is an important cause of SRMCM destruction.

关键词： Soil rock mixtures Macropore structure Mechanical characteristics Discrete element method Shear band

Superhydrophilic nickel hydroxide ultrathin nanosheets enable high-performance asymmetric supercapacitors

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Rare Metals 2024年第1期43卷 138-147页

作者： Yi-Ran Wang Fei Zhang jian-Min Gu Xiao-Yu Zhao Ran Zhao xing Wang Tian-Hui Wu jing Wang ji-Dong Wang De-Song Wang State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryYanshan UniversityQinhuangdao 066004China Department of Food and Pharmaceutical Engineering Suihua UniversitySuihua 152000China School of Chemical Science and Engineering Tongji UniversityShanghai 200092China School of Sciences Hebei University of Science and TechnologyShijiazhuang 050018China

Superhydrophilic surfaces have been applied for supercapacitor;however,during energy storage reaction,how the wettability affects the process of electrochemical reaction specifically is still ***,we demonstrate superhydrophilic surface for promotion of electrochemical reactions by liquid affinity and further explain the mechanism,where the transition of the wettability state caused by the change in surface free energy is the main reason for the obvious increase in specific *** citric acid assistance strategy,an intrinsically hydrophobic Ni(OH)_(2)thick nanosheets(HNHTNs,16 nm)can be transitioned into superhydrophilic Ni(OH)_(2)ultrathin nanosheets(SNHUNs,6.8 nm),where the water contact angle was 0°and the surface free energy increased from 8.6to 65.8 mN·m^(-1),implying *** with HNHTNs,the specific capacitance of SNHUNs is doubled:from 1230 F·g^(-1)(HNHTNs)to 2350 F·g^(-1)(2A·g^(-1))and,even at 20 A·g^(-1),from 833 F·g^(-1)(HNHTNs)to 1670 F·g^(-1).The asymmetric capacitors assembled by SNHUNs and activated carbon show 52.44 Wh·kg^(-1)at 160W·kg^(-1)and excellent stability with~90%retention after5000 cycles(~80%retention after 9500 cycles).The promotion of electrochemical performances is ascribed to the change of surface wettability caused by surface free energy,which greatly increase affinity of electrode to the surrounding liquid environment to reduce the interface resistance and optimize the electron transport path.

关键词： Asymmetric supercapacitor Superhydrophilic interface Transition metal hydroxides Ultrathin nanosheets High specific capacitance

Multiple factors influencing high-purity indium electrolytic refining

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Chinese Journal of Chemical Engineering 2024年第7期71卷 148-160页

作者： Hong-Qiang Fan Fei Li Hong-xing Zheng Wu-ji Pan Mei-Zhen Wu Yashar Behnamian Ju-Bo Peng Dong-Hai Lin State Key Laboratory of Advanced Special Steel&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials Shanghai UniversityShanghai 200444China Research&Development Center Yunnan Tin Group(Holding)Limited CompanyKunming 650032China Department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 2V4AlbertaCanada School of Energy and Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China

The effects of various contaminants in the electrolytic refinement of indium were investigated using a glow discharge mass spectrometer(GDMS).The effects of several factors such as the indium ion(In3+)concentration,the sodium chloride(NaCl)concentration,the current density,the gelatin concentration,the pH,and the electrode distance,were *** variations in impurity levels concerning gelatin concentration were *** the gelatin and In3+concentration were moderately positively correlated with the Pb *** Sb concentration was associated positively with the NaCl concentration,while the Ti concentration had an adverse correlation with the NaCl *** Bi element content was positively linked to the electrode *** the current density increased,Cu,Pb,and Bi impurities initially rose and then eventually ***,a critical current density of 45 A·m^(-2) was identified in this behavior.

关键词： High-purity indium Electrolysis Multiple factors Electrochemistry Purification