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Hierarchical self-assembly: when sugar meets amino acid

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Science China Chemistry 2016年第12期59卷 1621-1622页

作者： Huibin qiu School of Physical Science and Technology ShanghaiTech University

Life is an extremely delicate self-assembly system, where a rich array of small molecules, macromolecules and other entities associate and organize in an intrinsically diverse and precise manner. During the past few decades, scientists have devoted enormous efforts to fabricate functional materials, including the interesting self-assembled molecular devices that recently crowned with the 2016 Nobel Chemistry Prize, by self-assembly of natural and synthetic molecules/mac- romolecules. Nevertheless, it still remains an incredibly big challenge to approach the elegance of life self-assembly, predominantly as a consequence of limited diversity and accuracy of chemistry, structure, and supramolecular asso- ciation of the building blocks.

关键词： when sugar meets amino acid Figure Hierarchical self-assembly

城郊宅基地征收中“钉子户”与地方政府的博弈分析——兼论“一把尺子量到底”+“拆迁奖励”政策

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山西师大学报(社会科学版) 2025年第1期52卷 97-107页

作者：孙秋鹏中国社会科学院马克思主义研究院

在城郊宅基地征收中，“钉子户”和地方政府的行为方式和策略选择将会直接影响土地增值收益分配的情况，并会影响土地征收数量、土地征收成本和社会福利水平。通过构建博弈模型可以得到如下结论：与普通农户相比，“钉子户”能够获得更... 详细信息

在城郊宅基地征收中，“钉子户”和地方政府的行为方式和策略选择将会直接影响土地增值收益分配的情况，并会影响土地征收数量、土地征收成本和社会福利水平。通过构建博弈模型可以得到如下结论：与普通农户相比，“钉子户”能够获得更多补偿的原因有：投入更多的博弈资源，能够忍受或有效规避地方政府惩罚造成的损失，具有博弈成本方面的优势；地方政府实行的“一把尺子量到底”+“拆迁奖励”政策是一种两阶段“最后通牒”策略，可以起到甄别“钉子户”和普通农户的作用，但也使得“钉子户”与地方政府之间的博弈不可避免；在“钉子户”与地方政府讨价还价过程中，与普通农户相比，“钉子户”具有更高的风险承受能力和讨价还价能力，能够获得更多的收益，但依然低于地方政府获得的份额；地方政府可以通过逐步试探的方式对两类农户进行甄别，因此不存在“钉子户”博弈给普通农户带来外部正效应的情况；“钉子户”和地方政府之间的博弈是为了争夺土地增值收益，博弈不是正和博弈或零和博弈而是负和博弈。

关键词：宅地基土地征收钉子户甄别讨价还价

黑磷/黑砷异质结纳米器件热电性质应力调控研究

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原子与分子物理学报 2025年第1期42卷 69-74页

作者：戎杙邱乙峰张蓓新疆大学物理科学与技术学院乌鲁木齐830046

探索新型高性能低维热电纳米材料已成为国家重大发展策略.论文采用密度泛函理论结合非平衡态格林函数方法研究了由黑磷、黑砷纳米带构建异质结构在2%、4%、6%和8%四种拉伸应变作用下热电性能调控机理.研究结果表明,6%拉伸应变较其他情形... 详细信息

探索新型高性能低维热电纳米材料已成为国家重大发展策略.论文采用密度泛函理论结合非平衡态格林函数方法研究了由黑磷、黑砷纳米带构建异质结构在2%、4%、6%和8%四种拉伸应变作用下热电性能调控机理.研究结果表明,6%拉伸应变较其他情形,能够更有效抑制声子输运行为;与此同时,拉伸应变对于器件的电子输运的调控效果并不明显.在费米能附近,黑磷/黑砷异质结纳米器件在6%拉伸应变调控下热电优值达到最大值2.31.

关键词：黑磷黑砷异质结应力热电性质

基于石墨烯电极TCNQ分子结热/电输运性质理论研究

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原子与分子物理学报 2025年第3期42卷 135-140页

作者：刘仪伟邱乙峰张蓓新疆大学物理科学与技术学院乌鲁木齐830046

本文采用密度泛函理论和非格林平衡函数,对基于石墨烯电极的7,7,8,8-四氰基苯醌二甲烷(Tetracyanoquinodimethane,TCNQ)分子结热/电输运性质进行系统研究.研究结果表明:随着中心TCNQ分子个数的增加,声子透射系数明显降低,即声子透射行... 详细信息

本文采用密度泛函理论和非格林平衡函数,对基于石墨烯电极的7,7,8,8-四氰基苯醌二甲烷(Tetracyanoquinodimethane,TCNQ)分子结热/电输运性质进行系统研究.研究结果表明:随着中心TCNQ分子个数的增加,声子透射系数明显降低,即声子透射行为受到极大抑制.与此同时,电子透射系数也有一定程度的减小.在热/电参数的协同作用下,伴随分子数量的增加分子结热电转换性能呈上升趋势,1TCNQ热电优值(ZT)为0.016,而2TCNQ则上升了1个数量级,ZT值达到0.11.最后,我们对分子结依赖于分子结构个数的自旋输运性质进行研究,发现TCNQ分子结具有显著的自旋过滤效应,其过滤能力随着TCNQ分子数量的增加而增加.该工作可为实验制备分子热电器件提供理论依据和数据支持.

关键词：锯齿状石墨烯纳米带 TCNQ分子自旋输运性质自旋过滤效应

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Some recent advances in 3D crack and contact analysis of elastic solids with transverse isotropy and multifield coupling

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Acta Mechanica Sinica 2015年第5期31卷 601-626页

作者： Wei-qiu Chen Department of Engineering Mechanics Zhejiang University

Significant progress has been made in mixed boundary-value problems associated with three-dimensional（3D） crack and contact analyses of advanced materials featuring more complexities compared to the conventional isotropic elastic *** include material anisotropy and multifield coupling,two typical characteristics of most current multifunctional *** this paper we try to present a state-of-the-art description of 3D exact/analytical solutions derived for crack and contact problems of elastic solids with both transverse isotropy and multifield coupling in the latest decade by the potential theory method in the spirit of *** ingenious breakthrough brings new vigor and vitality to the old research subject of classical potential *** are particularly interested in crack and contact problems with certain nonlinear *** is also placed on the coupling between the temperature field（or the like） and other physical fields（e.g.,elastic,electric,and magnetic fields）.We further highlight the practical significance of 3D contact solutions,in particular in applications related to modern scanning probe microscopes.

关键词： Crack Contact Mixed boundary-value problem Transverse isotropy Multifield coupling Potential theory Exact solution Scanning probe microscope

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考虑盐度影响的粉煤灰固化软土直剪试验

江苏大学学报（自然科学版） 2025年第1期46卷 120-124页

作者：殷杰邱文杰田雪晨江苏大学土木工程与力学学院江苏镇江212013

采用粉煤灰作为固化剂,制备了多组粉煤灰固化软土试样,其孔隙水中盐度分别为0%、2%、4%和6%,养护龄期分别为3 h、7 d和28 d.通过开展室内直剪试验,探讨盐度对粉煤灰固化软土强度特性的影响.试验结果表明:竖向固结压力为50 kPa时,粉煤灰... 详细信息

采用粉煤灰作为固化剂,制备了多组粉煤灰固化软土试样,其孔隙水中盐度分别为0%、2%、4%和6%,养护龄期分别为3 h、7 d和28 d.通过开展室内直剪试验,探讨盐度对粉煤灰固化软土强度特性的影响.试验结果表明:竖向固结压力为50 kPa时,粉煤灰固化软土的剪应力与剪切位移关系曲线呈现软化型,而在竖向固结压力为200 kPa时曲线呈现硬化型;高盐度试样具有较低的峰值剪应力和残余强度,表明高盐度对粉煤灰固化软土强度特性具有不利的影响;随着盐度增加,各养护龄期下软土试样的抗剪强度、黏聚力和内摩擦角的曲线均呈现近似线性下降的趋势,主要原因在于盐度的增加抑制了粉煤灰中活性成分的水化反应.

关键词：粉煤灰软土固化剂盐度养护龄期室内直剪试验

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抗裂型水泥稳定碎石配合比的性能检测研究

质量与认证 2025年第1期 117-120页

作者：邱珉霞浦县恒城工程检测有限公司

本文重点研究抗裂型水泥稳定碎石配合比的性能检测,详细总结了水泥稳定碎石材料抗裂性能的评价方法,从粗集料级配设计、细集料级配设计、水泥用量确定、粗细集料配比方案确定4个方面对配合比设计展开分析,并进行了力学性能检测、抗裂性... 详细信息

本文重点研究抗裂型水泥稳定碎石配合比的性能检测,详细总结了水泥稳定碎石材料抗裂性能的评价方法,从粗集料级配设计、细集料级配设计、水泥用量确定、粗细集料配比方案确定4个方面对配合比设计展开分析,并进行了力学性能检测、抗裂性能检测、收缩性能检测,检测结果显示其综合性能较好,能够为水泥稳定碎石混合料的合理应用提供有效参考。

关键词：抗裂型水泥稳定碎石配合比性能检测

Carbon materials toward efficient potassium storage:Rational design,performance evaluation and potassium storage mechanism

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Green Energy & Environment 2023年第1期8卷 115-140页

作者： Daping qiu Yanglong Hou Beijing Key Laboratory for Magnetoelectric Materials and Devices Beijing Innovation Centre for Engineering Science and Advanced TechnologySchool of Materials Science and EngineeringPeking UniversityBeijing100871China

Potassium-ion batteries(PIBs)are potential“Beyond Li-ion Batteries”candidates for their resource advantage and low standard electrode *** date,the research on PIBs is in its early stages,the most urgent task is to develop high-performance electrode materials and reveal their potassium storage *** PIBs anode materials,carbon with tunable microstructure,excellent electrochemical activity,nontoxicity and low price is considered as one of the most promising anode materials for *** some breakthrough works have emerged,the overall electrochemical performance of the reported carbon anode is still far away from practical ***,we carry out a comprehensive overview of PIBs carbon anode in terms of three aspects of rational design of structure,performance evaluation criteria and characterization of potassium storage ***,the regulation mechanism of key structural features of carbon anode on its potassium storage performance and the representative structural regulation strategies are ***,in view of the undefined performance evaluation criteria of PIBs carbon anode,a reference principle for evaluating the potassium storage performance of carbon anode is ***,the advanced characterization techniques for the potassium storage mechanism of carbon anode are *** review aims to provide guidance for the development of practical PIBs anode.

关键词： Potassium-ion batteries Carbon anode Structural engineering Performance evaluation Potassium storage mechanism

Comparison of Thermal Performance between Annular Fins and Longitudinal Fins in Latent Heat Storage Unit

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Journal of Thermal Science 2023年第3期32卷 1227-1238页

作者： ZHU Yuxi qiu Yan School of Energy and Power Engineering Shandong UniversityJi'nan 250061China

As a simple and effective method of heat transfer enhancement,fins are widely used in latent heat storage ***,the choice of annular fins and longitudinal fins has always been *** this paper,the melting process of phase change material(PCM)in annular fins and longitudinal fins latent heat storage units with the same volume is numerically *** ensure the same thermal penetration,three-dimensional spaces occupied with fins are specially controlled to be the *** with finned structures,the effects of natural convection(NC),placement mode and heat transfer fluid(HTF)inlet direction on the melting process are *** results show that the melting time in annular finned structure is always 10%less than that in longitudinal finned structure,which demonstrates the superior of the annular fins in the latent heat storage *** melting time is the shortest in vertical unit with annular fins and HTF inlet at the ***,the correlation formulas of the liquid fraction are proposed in the vertical unit with HTF inlet at the bottom.

关键词： latent heat storage annular fins longitudinal fins natural convection