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Highly Efficient Na+ Storage in Uniform Thorn Ball-Like α-MnSe/C Nanospheres

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 373-382页

作者： Zhenzhe Li Shuhao Xiao jiawei Liu Xiaobin Niu Yong xiang Tingshuai Li Jun Song Chen School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054China Center for Applied Chemistry University of Electronic Science and Technology of ChinaChengdu 611731China

Because of its high theoretical capacity,MnSe has been identified as a promising candidate as the anode material for sodiumion ***,its fast capacity deterioration due to the huge volume change during the intercalation/deintercalation of sodium ions severely hinders its practical ***,the sodium storage mechanism of MnSe is still under discussion and requires in-depth ***,the unique thorn ball-likeα-MnSe/C nanospheres have been prepared using manganese-containing metal organic framework(Mn-MOF)as a precursor followed by in situ gas-phase selenization at an elevated *** serving as the anode material for sodium-ion battery,the as-preparedα-MnSe/C exhibits enhanced sodium storage capabilities of 416 and 405 mAh g^(-1)at 0.2 and 0.5 A g^(-1)after 100 cycles,*** also shows a superior capacity retention of 275 mA h g^(-1)at 10 A g^(-1)after 2000 cycles,and a rate performance of 279 mA h g^(-1)at 20 A g^(-1).Such sodium storage properties could be attributed to the unique structure offering a highly efficient Na+diffusion kinetics with a diffusion coefficient between 1×10^(-11) and 3×10^(-10) cm^(2) *** density functional theory calculation indicates that the fast Na+diffusion mainly takes place on the(100)plane of MnSe along a V-shaped path because of a relatively low diffusion energy barrier of 0.15 eV.

关键词： MnSe Sodium storage mechanism High-rate performance Long-term stability Uniform nanospheres

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连续管氮气泡沫冲砂技术在新疆油田的应用

焊管 2024年第7期47卷 45-49页

作者：于龙谢翔张志伟李洋刘家炜中国石油集团西部钻探工程有限公司试油公司新疆克拉玛依834000 中石油江汉机械研究所有限公司湖北荆州434000 长江大学机械工程学院湖北荆州434023

新疆油田部分区块的地层压力系数普遍较低,连续管在水平井水力冲砂作业过程中经常面临漏失、井口失返等复杂情况。针对这一问题,采用低密度氮气泡沫液进行连续管冲砂作业,并设计了泡沫冲砂工艺、检测了低密度泡沫液性能。现场应用结果表... 详细信息

新疆油田部分区块的地层压力系数普遍较低,连续管在水平井水力冲砂作业过程中经常面临漏失、井口失返等复杂情况。针对这一问题,采用低密度氮气泡沫液进行连续管冲砂作业,并设计了泡沫冲砂工艺、检测了低密度泡沫液性能。现场应用结果表明,与常规冲砂液相比,泡沫具有低密度,可实现低压或负压循环,减少漏失;氮气泡沫冲砂技术可以满足连续管冲砂的施工以及有效的井筒疏通,保障了连续管冲砂作业的安全高效运行,符合现场施工要求。

关键词：连续管氮气泡沫冲砂低压漏失水平井井筒

Recent advances of two-dimensional metal-organic frameworks in alkaline electrolysis water for hydrogen production

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Science China Chemistry 2023年第7期66卷 1924-1939页

作者： Peisen Liao jiawei Kang Yicheng Zhong Runan xiang Shihan Wang Suisheng Li Xianlong Liu Guangqin Li School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China School of Chemistry and Environment Jiaying UniversityMeizhou 514015China

Hydrogen evolution production via electrolysis of water in alkaline solution is a promising mean of industrial hydrogen ***,inefficiency and high cost restrict its industrialization *** on extensive studies of experimental and theoretical investigations,two-dimensional(2D)materials are promising substitute of noble metals for hydrogen evolution reaction(HER)with low cost and ***,recent progress in 2D metal-organic frameworks(MOFs)for HER in alkaline electrolyte is systematically discussed and *** review describes the strategies about how to design and optimize the structure of 2D MOF-based materials as HER electrocatalysts with well performance and aims to provide potential avenues for industrial hydrogen ***,the challenges and future directions ahead in this field are also proposed.

关键词： hydrogen production 2D materials electroctalyst alkaline metal-organic frameworks

Ce:GdYAG phosphor-in-glass:An innovative yellow-emitting color converter for solid-state laser lighting

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Journal of Materials Science & Technology 2023年第3期134卷 42-49页

作者： Luhan Wang Jiangdan Zhang Li Xu Shuyang Bao Yu Wang jiawei Liu Xiaojuan Liang Weidong xiang College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China College of Life and Environmental Science Wenzhou UniversityWenzhou 325035China

Stable,efficient and high color rendering index all-inorganic color converters are urgently demanded for white laser ***-in-glass(PiG),possessing the advantages of phosphors excellent quantum efficiency as well as favorable chemical and thermal stability of glass,has attracted widespread *** have been only very few reports of Y_(1.31)Ce_(0.09)Gd_(1.6)Al_(5)O_(12)(Ce:GdYAG)PiG for solid-state laser ***,a series of Ce:GdYAG PiG samples are fabricated by a simple solid-state sintering ***,the supreme internal quantum efficiency of as-prepared PiG is 91%,which is very close to original phosphors(95%).Furthermore,PiG exhibits a high thermal conductivity(1.844 W m^(−1)K^(−1))and a maximum transparency(62%).Remarkably,by changing the concentration of phosphors and the thickness of PiG samples,a luminous efficacy of 163.5 lm/W,high color rendering index of 74.8 and low correlated color temperature of 4806.8 K are achieved under blue laser *** results indicate that the Ce:GdYAG PiG samples have shown tremendous application foreground as all-inorganic color converter for solid-state laser lighting.

关键词： Ce:GdYAG Phosphor-in-glass Solid-state laser lighting Optical performance

不同频次海温强迫对台风“利奇马”模拟的影响

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海洋预报 2024年第2期41卷 71-82页

作者：易侃姚佳伟李响杜梦蛟张蕴斐罗嘉琪王晨琦中国长江三峡集团有限公司科学技术研究院北京101199 国家海洋环境预报中心自然资源部海洋灾害预报技术重点实验室北京100081

基于WRF气象模式,利用不同时间频次的海温强迫场对2019年超强台风“利奇马”个例开展模拟研究。结果表明:不同时间频次海温强迫对台风“利奇马”路径模拟的影响较小,而对台风强度和结构的模拟有较大影响。高频海温强迫场相较于日平均海... 详细信息

基于WRF气象模式,利用不同时间频次的海温强迫场对2019年超强台风“利奇马”个例开展模拟研究。结果表明:不同时间频次海温强迫对台风“利奇马”路径模拟的影响较小,而对台风强度和结构的模拟有较大影响。高频海温强迫场相较于日平均海温场保留了海温与台风相互作用之前的信号,使其在台风路径上的暖涡更暖,导致模拟的台风强度更强,特别是在快速增强阶段与中国气象局台风最佳路径数据更为接近。通过对台风过程中的热力和动力过程分析发现,高频海温强迫场会使更多的水汽进入台风中心,释放凝结潜热,增强台风次级环流。对流增强使得内核区域下沉气流增强,进而加强台风暖心,导致中心气压降低,台风增强;同时,入流的增强使得更多的涡度和角动量向台风中心输送,台风结构紧致,平均切向风增大,台风增强。

关键词：海温台风强度时间分辨率次级环流

碳量子点材料作为荧光探针检测离子的原理及应用进展

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绿色科技 2020年第4期22卷 128-131页

作者：段立民汪瑞贾诚浩李珂万相嘉威王琛王进合肥工业大学资源与环境工程学院安徽合肥230009

指出了作为碳纳米材料的新兴成员,碳量子点(CQDs)因其优异的荧光性能,在离子检测方面展现出潜在的应用价值。阐述了CQDs作为荧光探针检测离子的几种检测原理以及CQDs作为荧光探针检测Cu^2+、Fe^3+、Ag^+、Hg^2+等金属阳离子和P3O4^-、I^... 详细信息

指出了作为碳纳米材料的新兴成员,碳量子点(CQDs)因其优异的荧光性能,在离子检测方面展现出潜在的应用价值。阐述了CQDs作为荧光探针检测离子的几种检测原理以及CQDs作为荧光探针检测Cu^2+、Fe^3+、Ag^+、Hg^2+等金属阳离子和P3O4^-、I^-、F^-等阴离子的方法,总结了其作为荧光探针的优缺点并进行了展望。

关键词：碳量子点荧光探针检测原理离子

基于弱键化学探究姜黄素-槟榔碱分子互作的“减毒存效”

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中国药物警戒 2023年第10期20卷 1099-1107,1133页

作者：林晓钰项嘉伟姚舒畅谭森丽魏吉昌陈子瑜陈思宇雷海民王鹏龙北京中医药大学中药学院北京102488

目的基于中医临床常用配伍药对,观察姜黄素与槟榔碱分子间相互作用以及聚集体的形成,探究中药配伍过程中的“减毒存效”机制,为临床安全使用槟榔的复方制剂提供参考。方法应用UV-vis、IR、1H-NMR、PXRD、ITC与电导滴定技术,解析聚集体... 详细信息

目的基于中医临床常用配伍药对,观察姜黄素与槟榔碱分子间相互作用以及聚集体的形成,探究中药配伍过程中的“减毒存效”机制,为临床安全使用槟榔的复方制剂提供参考。方法应用UV-vis、IR、1H-NMR、PXRD、ITC与电导滴定技术,解析聚集体的形成过程并对其结构表征。通过小鼠急性毒性实验、HepG2细胞模型,观察聚集体形成前后的毒效作用变化。结果槟榔碱与姜黄素能够在水溶液中,通过弱键作用力以1:1比例聚集形成聚集体。该聚集体能够显著缓和大剂量氢溴酸槟榔碱的刺激作用,同时能够保持姜黄素原有的抗HepG2增殖的活性。结论本实验从中医药配伍理论和中医临床用药经验实践出发,为中药配伍“减毒存效”研究提供了新的思路。

关键词：槟榔碱姜黄素弱键化学减毒存效中药配伍

基于多方数字签名和认证的毕业论文管理系统设计

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长江信息通信 2024年第1期37卷 115-117页

作者：李辉朱可钦王嘉玮向光辉马丽江西科技师范大学江西南昌330038

为了使线上毕业论文指导意见及毕业答辩的成绩真实可靠,提出一种基于数字签名的毕业论文管理系统。本系统为注册的用户分发代表身份的密钥对,对每次毕业论文的任何修改都附加修改者本人的签名,并在其他用户在异地打开毕业论文的同时验... 详细信息

为了使线上毕业论文指导意见及毕业答辩的成绩真实可靠,提出一种基于数字签名的毕业论文管理系统。本系统为注册的用户分发代表身份的密钥对,对每次毕业论文的任何修改都附加修改者本人的签名,并在其他用户在异地打开毕业论文的同时验证签名。本系统可以辅助完成在线答辩,保证答辩成绩的真实性和不可否认性。基于数字签名的认证用于毕业论文的管理对规范毕业论文管理过程、实现多方可信的毕业论文成果的共识能起到积极的促进作用。

关键词：毕业论文管理系统数字签名线上指导 Django架构前端设计

Characterization of Distinct T Cell Receptor Repertoires in Tumor and Distant Non-tumor Tissues from Lung Cancer Patients

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Genomics, Proteomics & Bioinformatics 2019年第3期17卷 287-296页

作者： xiang Wang Botao Zhang Yikun Yang jiawei Zhu Shujun Cheng Yousheng Mao Lin Feng Ting Xiao State Key Laboratory of Molecular Oncology Department of Etiology and CarcinogenesisNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College Department of Thoracic Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College

T cells and T cell receptors(TCRs)play pivotal roles in adaptive immune responses against *** development of next-generation sequencing technologies has enabled the analysis of the TCRb repertoire *** the scarce investigations on the TCR repertoire in lung cancer tissues,in this study,we analyzed TCRb repertoires in lung cancer tissues and the matched distant non-tumor lung tissues(normal lung tissues)from 15 lung cancer *** on our results,the general distribution of T cell clones was similar between cancer tissues and normal lung tissues;however,the proportion of highly expanded clones was significantly higher in normal lung tissues than in cancer tissues(0.021%±0.002%vs.0.016%±0.001%,P=0.0054,Wilcoxon signed rank test).In addition,a significantly higher TCR diversity was observed in cancer tissues than in normal lung tissues(431.37±305.96 vs.166.20±101.58,P=0.0075,Mann-Whitney U test).Moreover,younger patients had a significantly higher TCR diversity than older patients(640.7±295.3 vs.291.8±233.6,P=0.036,Mann-Whitney U test),and the higher TCR diversity in tumors was significantly associated with worse cancer ***,we provided a comprehensive comparison of the TCR repertoires between cancer tissues and matched normal lung tissues and demonstrated the presence of distinct T cell immune microenvironments in lung cancer patients.

关键词： Adaptive immune response T cell receptor repertoire Lung cancer High-throughput sequencing TCR diversity