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Preparation and Structure-Property Regulation Mechanism of Reversible Thermochromic Polydiacetylene

Chinese Journal of Polymer Science 2024年第8期42卷 1111-1121页

作者： zhi-Qing Ge Shuo Yan Zu-Xiong Pan Shan Lei Xuan-zhi mao Chu Zhao Mo-Zhen Wang Xue-Wu Ge Key Laboratory of Precision and Intelligent Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Marshall Laboratory of Biomedical Engineering International Cancer CenterLaboratory of Evolutionary Theranostics(LET)School of Biomedical EngineeringShenzhen University Medical SchoolShenzhen UniversityShenzhen 518055China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

The thermochromic mechanism and the structure-property regulation principle of reversible thermochromic polydiacetylene(PDA)materials have always been a challenging *** this work,a series of diacetylene monomers(m-PCDA)containing phenyl and amide or carboxyl groups were synthesized from 10,12-pentacosadiynoic acid(PCDA)through the esterification or amidation *** effects of the number and the distribution of the functional groups in m-PCDA molecules on their solid-state polymerization capability,and the thermochromic mechanism of their corresponding polymers(m-PDA)were investigated and discussed in *** results show that the m-PCDA monomers containing both benzene ring and groups that can form hydrogen bonding interactions have strong intermolecular interaction,and are easy to carry out the solid phase polymerization under 254-nm UV irradiation to obtain the corresponding new thermochromic m-PDA *** thermochromic behavior of m-PDA depends on its melting *** initial color-change temperature(blue to red)is determined by the onset melting tem perature,and the temperature range in which reversible color recovery can be achieved by repeat heating-cooling treatment is determined by its melting *** to the proposed thermochromic mechanism of PDA,various new PDA materials with precise thermochromic temperatu res and reversible thermochromic temperature ra nges can be designed and synthesized through the appropriate introduction of benzene ring and groups that can form hydrogen bonding interactions into the molecular structure of linear diacetylene *** work provides a perspective to the precise molecular structure design and the property regulation of the reversible thermochromic PDA materials.

关键词： Polydiacetylene Thermochromism Hydrogen bonding Chemical modification

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A Chinese Multi-Specialty Delphi Consensus to Optimize RAASi Usage and Hyperkalaemia Management in Patients with Chronic Kidney Disease and Heart Failure

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Chinese Medical Sciences Journal 2024年第2期39卷 79-90页

作者： Ming-Hui Zhao Wei Chen Hong Cheng Bi-Cheng Liu zhi-Guo mao Zhuang Tian Gang Xu Jing-Min Zhou Renal Division Peking University First HospitalBeijing 100034China Department of Nephrology The First Affiliated HospitalSun Yat-Sen UniversityGuangzhou 510080China Department of Nephrology Capital Medical UniversityBeijing 100029China Department of Nephrology Southeast University Zhongda HospitalNanjing 210009China Department of Nephrology Shanghai Changzheng HospitalShanghai 200003China Department of Cardiology Peking Union Medical College HospitalBeijing 100730China Renal Division Tongji Medical College of Huazhong University of Science and TechnologyWuhan 430030China Department of Cardiology Zhongshan HospitalFudan UniversityShanghai 200032China

Objective Variations are present in common clinical practices regarding best practice in managing hyperkalaemia(HK),there is therefore a need to establish a multi-specialty approach to optimal renin angiotension-aldosterone system inhibitors(RAASi)usage and HK management in patients with chronic kidney disease(CKD)&heart failure(HF).This study aimed to establish a multi-speciality approach to the optimal use of RAASi and the management of HK in patients with CKD and *** A steering expert group of cardiology and nephrology experts across China were convened to discuss challenges to HK management through a nominal group *** group then created a list of 41 statements for a consensus questionnaire,which was distributed for a further survey in extended panel group of cardiologists and nephrologists across *** was assessed using a modified Delphi technique,with agreement defined as"strong"(≥75%and<90%)and"very strong"(≥90%).The steering group,data collection,and analysis were aided by an independent *** A total of 150 responses from 21 provinces across China were recruited in the *** were comprised of an even split(n=75,50%)between cardiologists and *** 41 statements achieved the 75%consensus agreement threshold,of which 27 statements attained very strong consensus(≥90%agreement)and 14 attained strong consensus(agreement between 75%and 90%).Conclusion Based on the agreement levels from respondents,the steering group agreed a set of recommendations intended to improve patient outcomes in the use of RAASi therapy and HK management in China.

关键词： Sardiorenal syndrome chronic kidney failure heart failure hyperkalemia multidisciplinary communication RAASi

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Binder-induced ultrafast ■-intercalation toward a high-voltage,high-power and long-cycling zinc–graphite dual-ion battery

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Rare Metals 2024年第10期43卷 5017-5029页

作者： Gen Li Xiao-Jun Shi Ting Dong Qian Yu zhi-Fei mao Xin-Hua Liu Rui Wang Bei-Bei He Jun Jin Yan-Sheng Gong Huan-Wen Wang Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Material Science and ChemistryChina University of Geosciences College of Resources and Environment South-Central Minzu University School of Transportation Science and Engineering Beihang University

Metallic zinc is an ideal anode material owing to its high theoretical capacity (819 mAh·g-1),ecofriendliness,low cost and high safety,which have driven fast development of Zn-ion batteries （ZIBs）.However,the practical application of current ZIBs is significantly restricted by irregular dendrite growth of zinc anode and the low working voltage （usually<2 V） of cathode ***,we report a high-voltage Zn-based dualion battery （DIB）,which is constructed by a graphite cathode,a Zn anode,and 3 M LiPF6in the ethyl methyl carbonate （EMC） *** the corrosion interaction of Li+ions,Zn2+can be easily dissolved from Zn anode into the electrolyte to enable dendrite-free Zn2+plating/stripping at the ***,an aqueous carboxymethyl cellulose （CMC） binder is employed to generate a robust cathode electrolyte interface （CEI） layer on the graphite cathode,which renders ultrafast PF6--de-/intercalation into *** resultant Zn–graphite DIB operates stably at a high cut off voltage of 3.2 V,corresponding to an average output voltage of 2.2 *** 9000cycles at 5C,the high capacity retention of 95.9% can be achieved with～100%Coulomb *** on the mass of cathode material,our Zn–graphite battery exhibits ultrafast rate capability （60 C,a discharge time of 44 s） and high energy/power densities (208 Wh·kg-1at 214 W·kg-1;142 Wh·kg-1at 8692 W·kg-1),which holds great promise for large-scale energy storage.

关键词： Binder Graphite High-voltage PF6−-de-/intercalation Zn-ion batteries

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Efficient and selective removal of Pb(Ⅱ) from landfill leachate using L-serine-modified polyethylene/polypropylene nonwoven fabric synthesized via radiation grafting technique

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Nuclear Science and Techniques 2024年第4期35卷 144-155页

作者： Xin-Xin Feng Cheng Li Xuan-zhi mao Wan-Ning Ren Yang Gao Yu-Long He Zhe Xing Rong Li Guo-Zhong Wu Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

In this study,to efficiently remove Pb(Ⅱ) from aqueous environments,a novel L-serine-modified polyethylene/polypropylene nonwoven fabric sorbent(NWF-serine)was fabricated through the radiation grafting of glycidyl methacrylate and subsequent L-serine *** effect of the absorbed dose was investigated in the range of 5–50 ***-serine was characterized by Fourier transform infrared spectroscopy,thermogravimetric analysis,and scanning electron *** adsorption tests were conducted to investigate the influences of pH,adsorption time,temperature,initial concentration,and sorbent dosage on the Pb(Ⅱ) adsorption performance of *** results indicated that Pb(Ⅱ) adsorption onto NWF-serine was an endothermic process,following the pseudo-second-order kinetic model and Langmuir isotherm *** saturated adsorption capacity was 198.1 mg/***-serine exhibited Pb(Ⅱ) removal rates of 99.8% for aqueous solutions with initial concentrations of 100 mg/L and 82.1% for landfill leachate containing competitive metal ions such as Cd,Cu,Ni,Mn,and ***,NWF-serine maintained 86% of its Pb(Ⅱ) uptake after five use *** coordination of the carboxyl and amino groups with Pb(Ⅱ) was confirmed using X-ray photoelectron spectroscopy and extended X-ray absorption fine structure analysis.

关键词： Landfill leachate Radiation grafting Polyethylene/polypropylene nonwoven fabric Pb(Ⅱ)removal

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Effect of Y element on atomic structure, glass forming ability,and magnetic properties of FeBC alloy

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Chinese Physics B 2024年第7期33卷 440-446页

作者：肖晋桦丁大伟李琳孙奕韬李茂枝汪卫华 State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Institute of Physics Chinese Academy of SciencesBeijing 100190China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China

The atomic structure of amorphous alloys plays a crucial role in determining both their glass-forming ability and magnetic properties. In this study, we investigate the influence of adding the Y element on the glass-forming ability and magnetic properties of Fe_(86-x)Y_xB_7C_7(x = 0, 5, 10 at.%) amorphous alloys via both experiments and ab initio molecular dynamics simulations. Furthermore, we explore the correlation between local atomic structures and properties. Our results demonstrate that an increased Y content in the alloys leads to a higher proportion of icosahedral clusters, which can potentially enhance both glass-forming ability and thermal stability. These findings have been experimentally validated. The analysis of the electron energy density and magnetic moment of the alloy reveals that the addition of Y leads to hybridization between Y-4d and Fe-3d orbitals, resulting in a reduction in ferromagnetic coupling between Fe atoms. This subsequently reduces the magnetic moment of Fe atoms as well as the total magnetic moment of the system, which is consistent with experimental results. The results could help understand the relationship between atomic structure and magnetic property,and providing valuable insights for enhancing the performance of metallic glasses in industrial applications.

关键词： Fe-based amorphous alloy ab initio molecular dynamic simulation glass-forming ability magnetic properties

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坐庄、嵌套与循环:《西游记》的交易奥秘——兼论游戏说的谬误

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许昌学院学报 2024年第1期43卷 54-61页

作者：毛志勇山西大学社会哲学与城乡发展研究中心山西太原030006

唐僧取经表面像游戏,本质是交易,目的是清心安天。将取经看作承载一系列交易的事件,会发现其结构是嵌套式的,从顶层依次往下分别为玉帝与如来的交易、观音代表如来与李世民的交易、观音代表如来与唐僧师徒的交易,以及取经过程中发生的... 详细信息

唐僧取经表面像游戏,本质是交易,目的是清心安天。将取经看作承载一系列交易的事件,会发现其结构是嵌套式的,从顶层依次往下分别为玉帝与如来的交易、观音代表如来与李世民的交易、观音代表如来与唐僧师徒的交易,以及取经过程中发生的各种具体交易。层层穿透下去,本质是佛派坐庄下心与天的交易,孙悟空和妖魔等天宫体制外势力把放纵的心收回,换取玉帝所在天宫的安宁,由此心获得天的庇护,天得到心的拥戴;此外,唐僧师徒证得功果,大乘佛法永传东土,大唐在阴司积压的冤魂得以超生,重启“人—鬼—人”的循环,除被剿灭或镇压的妖魔及被妖魔所伤的人类外,这场交易可谓各取所需。

关键词：西游记交易嵌套循环理性

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基于注意力自相关机制的剩余杂波抑制方法

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西安电子科技大学学报 2024年第1期51卷 41-51页

作者：申露苏洪涛汪晋毛智景鑫琛李泽西安电子科技大学雷达信号处理全国重点实验室陕西西安710071 南京电子研究所江苏南京210039

雷达工作时面临着复杂多变的环境,杂波特性经常呈现非均匀性和时变性。未被完全抑制的杂波剩余可能会产生大量虚警,进而导致虚假航迹产生或目标跟踪精度降低。在严重情况下,这些虚警还可能使雷达数据处理系统饱和,影响雷达系统的探测能... 详细信息

雷达工作时面临着复杂多变的环境,杂波特性经常呈现非均匀性和时变性。未被完全抑制的杂波剩余可能会产生大量虚警,进而导致虚假航迹产生或目标跟踪精度降低。在严重情况下,这些虚警还可能使雷达数据处理系统饱和,影响雷达系统的探测能力。传统的剩余杂波抑制算法需要进行特征提取和构建分类器两个步骤,存在泛化能力差、特征组合难和分类器要求高等问题。为解决这些问题,受到自注意力机制和领域知识的启发,提出了一种数据与知识双驱动的注意力自相关机制。该机制可以有效提取用于区分目标和杂波的雷达回波相互关系的深度特征。同时,基于该机制,构建了一种剩余杂波抑制方法,充分利用雷达回波特征,提高了算法在剩余杂波抑制方面的性能。仿真和实测数据处理结果表明,该方法在剩余杂波抑制方面具有显著的性能优势和泛化能力。此外,该方法的并行计算结构可以提高算法的运行效率。

关键词：剩余杂波抑制注意力自相关机制深层特征神经网络

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一类奇异摄动Fredholm型积分微分方程的二阶自适应移动网格方法

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吉首大学学报（自然科学版） 2024年第4期45卷 15-25页

作者：罗丹毛志吉首大学数学与统计学院湖南吉首416000 铜仁学院大数据学院贵州铜仁554300

利用基函数方法和复合梯形公式构建了指数拟合有限差分格式,用该有限差分格式对一类奇异摄动Fredholm型积分微分方程进行了离散.用推导出的数值解的截断误差估计,并结合边界估计和稳定性分析,证明了自适应移动网格方法关于摄动参数在无... 详细信息

利用基函数方法和复合梯形公式构建了指数拟合有限差分格式,用该有限差分格式对一类奇异摄动Fredholm型积分微分方程进行了离散.用推导出的数值解的截断误差估计,并结合边界估计和稳定性分析,证明了自适应移动网格方法关于摄动参数在无穷范数意义下具有二阶一致收敛性.在理论分析的基础上,设计出二阶自适应移动网格生成算法.

关键词：奇异摄动 Fredholm型积分方程自适应移动网格一致收敛

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奇异摄动Fredholm方程积分初值问题的二阶移动网格方法

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湘潭大学学报（自然科学版） 2024年第3期46卷 45-56页

作者：罗丹毛志吉首大学数学与统计学院湖南吉首416100

为了克服奇异摄动Fredholm积分微分方程的精确解在很薄的初始层内的剧烈变化,提出了关于摄动参数在无穷范数意义下具有二阶一致收敛性的数值方法.针对积分初值定解问题,使用基函数方法构建指数拟合有限差分格式进行离散,其中积分部分采... 详细信息

为了克服奇异摄动Fredholm积分微分方程的精确解在很薄的初始层内的剧烈变化,提出了关于摄动参数在无穷范数意义下具有二阶一致收敛性的数值方法.针对积分初值定解问题,使用基函数方法构建指数拟合有限差分格式进行离散,其中积分部分采用复合梯形公式.局部截断误差估计和稳定性分析的直接结果是整体截断误差估计.基于精确解的边界估计、应用等分布原理,作为整体误差估计的推论,数值方法的二阶一致收敛性被证明.根据算法步骤实施迭代生成移动网格,移动网格通过等分数值解弧长产生,弧长由控制函数计算,控制函数取自整体误差估计的具体表达形式.两个数值算例验证了二阶一致收敛性,比较实验表明移动网格较Shishkin网格与Bakhvalov网格具有优越性.

关键词：奇异摄动微分方程 Fredholm积分方程移动网格一致收敛

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级联STATCOM 直流侧电容电压失衡分析

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核聚变与等离子体物理 2024年第1期44卷 51-57页

作者：王健声吴亚楠茆华风李俊茆智伟卢晶许留伟安徽大学物质科学与信息技术研究院合肥230031 中国科学院合肥物质科学研究院等离子体物理研究所合肥230031

在托卡马克磁体电源系统运行过程中,发现其对应的无功补偿装置级联静止同步补偿器(STATCOM)各相链节间存在直流侧电压失衡的现象,且随着补偿电流增大。这一失衡程度有增大的趋势,这一问题会影响装置的稳定可靠运行,严重时会直接导致装... 详细信息

在托卡马克磁体电源系统运行过程中,发现其对应的无功补偿装置级联静止同步补偿器(STATCOM)各相链节间存在直流侧电压失衡的现象,且随着补偿电流增大。这一失衡程度有增大的趋势,这一问题会影响装置的稳定可靠运行,严重时会直接导致装置停止运行。通过建立STATCOM的电路模型,结合其电路模型建立了相应的数学模型,研究了电网谐波、电容容量、损耗以及脉冲触发延时对电容电压失衡的影响。通过MATLAB/Simulink仿真软件验证,发现电网谐波、电容容量差异、开关触发脉冲延时差异、并联型损耗差异以及混合型损耗差异是造成STATCOM直流侧电容电压失衡的重要原因。

关键词：静止同步补偿器直流侧母线电压失衡电网谐波损耗差异开关触发脉冲延时

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