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A Two-dimensional Covalent Organic Framework for Iodine Adsorption

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Chemical Research in Chinese Universities 2022年第2期38卷 456-460页

作者： ZHANG Jianhui liu jianchuan liu Yaozu WANG Yujie FANG Qianrong QIU Shilun School of Information Engineering Zhongshan PolytechnicZhongshan 528404P.R.China State Key Laboratory of Inorganic Synthesis&Preparative Chemistry Jilin UniversityChangchun 130012P.R.China

Radioactive iodine is a notorious pollutant in gas radioactive nuclear waste due to its radiation hazard, volatility, chemical toxicity, and high mobility. Therefore, developing a material with high efficiency-specific iodine capture is significant. Covalent organic framework(COF) has attracted significant attention as a new crystalline porous organic material. Due to its large specific surface and high chemical stability, it is an excellent alternative to adsorbents. Herein, we report a chemically stable two-dimensional COF(termed JUC-609) with specific adsorption of iodine. Adsorption experiments show that JUC-609 has an excellent iodine adsorption capacity as high as 5.9 g/g under 353 K and normal pressure condition, and iodine adsorption after multiple cycles is still maintained. Our study thus promotes the potential application of COFs in the field of environment-related applications.

关键词： Porous material Covalent organic framework Iodine adsorption Mesoporous structure

Lithium Behavior in Salt-water System Explored by Molecular Dynamics Simulation

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1016-1020页

作者： MA Yanfang liu jianchuan LI Kanshe ZHANG Zhihong Chemistry and Chemical Engineering College Xi’an University of Science and TechnologyXi’an 710054China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province Xining 810008China Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Molecular Reaction Dynamics Institute of ChemistryChinese Academy of SciencesBeijing 100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China

The molecular dynamics simulation method was adopted to study the transient characteristics of Li^+,CO3^2-,and SO4^2- in Na^+,K^+,Li^+,Cl^-,and SO4^2-/H2O *** composition of Na^+,K^+,Li^+,Cl^-,SO4^2- and CO3^2- was selected to optimize the initial structural model and conduct dynamic *** mean azimuth shift and diffusion coefficient of Li^+,CO3^2-,and SO4^2- in the system,the radial distribution function and potential energy between Li^+ and -OW,SO4^2- and -OW as well as CO3^2- and -OW,and the dielectric constant of hydrogen bond were expounded and *** the same time,the Li enrichment behavior in the evaporation process of salt lake brine was analyzed based on the simulated *** results show that the simulation results are in good agreement with the experimental values,which verifies that,compared with other ions,the crystallization of Li^+ and SO4^2- occurs earlier after reaching saturation.

关键词： salt lakes Li^+ CO3^2- SO4^2- MD salt water system

Understanding the dehydrogenation properties of Mg(0001)/MgH_(2)(110)interface from first principles

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Materials Reports(Energy) 2024年第1期4卷 89-94页

作者： jianchuan Wang Bo Han Zhiquan Zeng Shiyi Wen Fen Xu Yong Du State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083PR China Powder Metallurgy Research Institute Central South UniversityChangsha410083PR China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004PR China

Magnesium hydride is one of the most promising solid-state hydrogen storage materials for on-board *** desorption from MgH_(2) is accompanied by the formation of the Mg/MgH_(2) interfaces,which may play a key role in the further dehydrogenation *** this work,first-principles calculations have been used to understand the dehydrogenation properties of the Mg(0001)/MgH_(2)(110) *** is found that the Mg(0001)/MgH_(2)(110) interface can weaken the Mg-H *** removal energies for hydrogen atoms in the interface zone are significantly lower compared to those of bulk MgH_(2).In terms of H mobility,hydrogen diffusion within the interface as well as into the Mg matrix is *** calculated energy barriers reveal that the migration of hydrogen atoms in the interface zone is easier than that in the bulk MgH_(2).Based on the hydrogen removal energies and diffusion barriers,we conclude that the formation of the Mg(0001)/MgH_(2)(110) interface facilitates the dehydrogenation process of magnesium hydride.

关键词： Magnesium hydrides First-principles calculation Hydrogen storage materials Interface Hydrogen desorption

Correlation of personality with individual reproductive success in shrub-nesting birds depends on their life history style

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Avian Research 2024年第1期15卷 42-49页

作者： jianchuan Li Wen Zhang Ningning Sun Yujie Wang Lifang Gao Ran Feng Liqing Fan Bo Du Tibet Museum of Natural Science Lhasa850011China School of Life Sciences Lanzhou UniversityLanzhou730000China Institute of Plateau Ecology Tibet Agricultural and Animal Husbandry UniversityLinzhi860000China

Two questions in the research of animal personality—whether there is a correlation between a personality trait and individual reproductive success,and what is the genetic basis underlying a personality trait—remain *** addressed these two questions in three shrub-nesting birds,the Azure-winged Magpie(Cyanopica cyanus,AM),White-collared Blackbird(Turdus albocinctus,WB),and Brown-cheeked Laughingthrush(Trochalopteron henrici,BL).The personality type of an individual was first identified according to its response to a territorial ***,we compared the fleeing distance,breeding parameters,and differential expressed genes(DEGs) in the brain transcriptome between bold and shy *** the three species,bold breeders exhibited more aggressiveness towards an intruder of their territory than did shy *** reproductive success of bold breeders was significantly higher than that of shy breeders in AM but not in WB and *** three species shared one DEG,crabp1,which was up-regulated in bold relative to in shy *** regulating the expression of corticotropin-releasing hormone,higher crabp1 gene expression can decrease cellular response to retinoic ***,bold individuals are insensitive to external stresses and able to exhibit more aggressiveness to intruders than their shier *** is beneficial to bold individuals in AM but not in WB and BL because the former could evoke neighbors to make the same response of defending against intruders but the latter could *** a personality trait may have the same genetic basis across species,its correlation with reproductive success depends largely on the life history style of a species.

关键词： Boldness Life history style Personality Reproductive success Transcriptome analysis

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一种高精度的短期潮汐预报模型

上海海事大学学报 2016年第3期37卷 74-80页

作者：柳成尹建川大连海事大学航海学院辽宁大连116026

为提高潮汐预报的精度,提出一种基于支持向量机(Support Vector Machine,SVM)的模块化潮汐实时预报模型.将潮汐分为受天体引潮力影响的天文潮和受环境因素和其他因素影响的非天文潮,分别使用调和分析法和改进的SVM对天文潮和非天文潮进... 详细信息

为提高潮汐预报的精度,提出一种基于支持向量机(Support Vector Machine,SVM)的模块化潮汐实时预报模型.将潮汐分为受天体引潮力影响的天文潮和受环境因素和其他因素影响的非天文潮,分别使用调和分析法和改进的SVM对天文潮和非天文潮进行预报,结合两种方法的输出构造最终的潮汐预报结果.在对非天文潮的预测中,将SVM与灰色模型相结合,并利用粒子群优化(Particle Swarm Optimization,PSO)算法对SVM的参数进行优化以提高预报精度.利用火奴鲁鲁港口的实测潮汐数据进行实时潮汐预报仿真.仿真结果表明该方法具有较高的短期预报精度.

关键词：潮汐预报模块化方法调和分析法支持向量机(SVM) 灰色模型粒子群优化(PSO)

Path Following and Stabilization of Underactuated Surface Ships

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Path Following and Stabilization of Underactuated Surface Sh...

政治关联对铁路债务融资能力影响及风险管控对策

2009中国控制与决策会议

作者： Renxiang Bu,Zhengjiang liu,Jiangqiang Hu,jianchuan Yin Navigation College,Dalian Maritime University,Dalian 116026

＜正＞To solve the path following and stabilization problems for underactuated surface ships with nonintegrable acceleration constraint,a nonlinear feedback algorithm is presented using decoupling control method and iterative nonlinear sliding mode designing *** saturations on actuators and unknown environmental disturbances are also explicitly *** with simple increment feedback control laws,a dynamic control strategy is developed to fulfill the underactuated following and stabilization objectives with only surge force and yaw movement available. Numerical simulation results on a full nonlinear hydrodynamic model of a training ship are presented to validate the effectiveness and robustness of the proposed controller.

关键词： Nonholonomic System Underactuated Ships Decoupling Control Sliding Mode Control

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理论学刊 2015年第7期 39-48页

作者：林晓言刘秀英刘建川北京交通大学经济管理学院北京交通发展研究基地北京100044

政治关联是连接企业内部治理与其所处制度环境的纽带之一。铁路债务融资能力和融资风险与其行业性质及政府管控密切相关。我国铁路债务风险在高度集权垄断的管理体制下容易演变为行业系统性的债务危机。实现政企分开是从制度层面完成对... 详细信息

政治关联是连接企业内部治理与其所处制度环境的纽带之一。铁路债务融资能力和融资风险与其行业性质及政府管控密切相关。我国铁路债务风险在高度集权垄断的管理体制下容易演变为行业系统性的债务危机。实现政企分开是从制度层面完成对铁路风险管控的第一步,其次是规范铁路政治关联机制。具体的风险管控措施包括:规范铁路政治关联的机制,充分考虑铁路债务既有情况、渐进式的制度改革逻辑以及铁路客观经济技术属性,调整政府与铁路的关系,使其制度框架趋向合理化,促进铁路这一经济主体在市场经济体制中能够正常运转。

关键词：政治关联铁路债务融资能力风险治理管控

高稳定二维联咔唑sp^(2)碳共轭共价有机框架材料用于高效电催化氧还原

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化学学报 2023年第8期81卷 884-890页

作者：刘建川李翠艳刘耀祖王钰杰方千荣吉林大学化学学院无机合成与制备化学国家重点实验室长春130012

化石燃料的过度消耗和环境污染已成为全球面临的主要问题,如何合理开发利用新能源成为我国能源战略中的主要目标.新型能量转换技术是促进新能源发展的关键.目前,以金属-空气电池、燃料电池等为主导的新型清洁电化学能量转换技术在转换... 详细信息

化石燃料的过度消耗和环境污染已成为全球面临的主要问题,如何合理开发利用新能源成为我国能源战略中的主要目标.新型能量转换技术是促进新能源发展的关键.目前,以金属-空气电池、燃料电池等为主导的新型清洁电化学能量转换技术在转换效率、经济性等方面均取得了重大突破,极具产业化应用前景.开发高效、稳定、低成本的电化学催化剂是促进清洁能转换装置发展的关键.在此,报道了一种基于联咔唑构筑单元合成的高稳定sp^(2)键型的共价有机框架材料(JUC-557)用于燃料电池阴极氧还原反应(ORR).该材料具有高比表面积、高稳定性等优点,同时也表现出高效的ORR催化性能和组装锌-空电池的应用潜力.此外,该材料相比于贵金属催化剂,也具有低成本、低污染、结构明确、原子和结构精度可控等优势.本研究为构建异质原子高效非金属电催化剂提供了一种新思路.

关键词：多孔材料共价有机框架电催化氧化还原非金属催化剂

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基础地理实体关系设计与试验

测绘科学 2023年第3期48卷 30-39页

作者：刘晰耿丽丽刘建川廖一铧自然资源部四川基础地理信息中心成都610093

针对目前基础地理实体关系难以构建和使用复杂等问题,通过分析已有实体关系类型,归并、化简、重新分类已有实体关系类型;设计实体关系一体化存储模型,并梳理出所有基础地理实体分类中存在的基础关系;通过编制实体关系构建表和实体关系... 详细信息

针对目前基础地理实体关系难以构建和使用复杂等问题,通过分析已有实体关系类型,归并、化简、重新分类已有实体关系类型;设计实体关系一体化存储模型,并梳理出所有基础地理实体分类中存在的基础关系;通过编制实体关系构建表和实体关系构建批处理程序,实现了基础地理实体关系的快速批量构建,验证了实体关系的使用效果。试验结果表明,该文提出的实体关系技术方法,便于实体数据关系的构建,在数据应用中也较为方便,在新型基础测绘和实景三维建设中,具有一定的参考和推广使用价值。

关键词：基础地理实体语义化实体关系空间关系关系构建