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All‑Covalent Organic Framework Nanofilms Assembled Lithium‑Ion Capacitor to Solve the Imbalanced Charge Storage Kinetics

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Nano-Micro Letters 2024年第6期16卷 246-260页

作者： Xiaoyang Xu Jia Zhang zihao Zhang Guandan Lu Wei Cao Ning Wang Yunmeng Xia Qingliang Feng Shanlin qiao College of Chemistry and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018People’s Republic of China School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China Hebei Engineering Research Center of Organic Solid Photoelectric Materials for Electronic Information Shijiazhuang 050018People’s Republic of China

Free-standing covalent organic framework(COFs)nanofilms exhibit a remarkable ability to rapidly intercalate/de-intercalate Li^(+) in lithium-ion batteries,while simultaneously exposing affluent active sites in supercapacitors.The development of these nanofilms offers a promising solution to address the persistent challenge of imbalanced charge storage kinetics between battery-type anode and capacitor-type cathode in lithium-ion capacitors(LICs).Herein,for the first time,custom-made COFBTMB-TP and COFTAPB-BPY nanofilms are synthesized as the anode and cathode,respectively,for an all-COF nanofilm-structured LIC.The COFBTMB-TP nanofilm with strong electronegative–CF3 groups enables tuning the partial electron cloud density for Li^(+) migration to ensure the rapid anode kinetic process.The thickness-regulated cathodic COFTAPB-BPY nanofilm can fit the anodic COF nanofilm in the capacity.Due to the aligned 1D channel,2D aromatic skeleton and accessible active sites of COF nanofilms,the whole COFTAPB-BPY//COFBTMB-TP LIC demonstrates a high energy density of 318 mWh cm^(−3) at a high-power density of 6 W cm^(−3),excellent rate capability,good cycle stability with the capacity retention rate of 77%after 5000-cycle.The COFTAPB-BPY//COFBTMB-TP LIC represents a new benchmark for currently reported film-type LICs and even film-type supercapacitors.After being comprehensively explored via ex situ XPS,7Li solid-state NMR analyses,and DFT calculation,it is found that the COFBTMB-TP nanofilm facilitates the reversible conversion of semi-ionic to ionic C–F bonds during lithium storage.COFBTMB-TP exhibits a strong interaction with Li^(+) due to the C–F,C=O,and C–N bonds,facilitating Li^(+) desolation and absorption from the electrolyte.This work addresses the challenge of imbalanced charge storage kinetics and capacity between the anode and cathode and also pave the way for future miniaturized and wearable LIC devices.

关键词： Covalent organic frameworks Lithium-ion capacitor Charge storage kinetic

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A silylene-stabilized distannavinylidene with a highly labile substituent

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Science China Chemistry 2023年第12期66卷 3555-3561页

作者： zihao qiao Ming Chen Zhenbo Mo State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin 300071China

Vinylidene and its heavier analogues are fundamentally important in synthetic chemistry,but their stabilization and structural characterization remains extremely challenging.Herein we describe that the reduction of an NHSi-stabilized stannyl-stannylene(2)with one molar equivalent of[(^(Mes)Nacnac)Mg]_(2)affords an NHSi-stabilized distannavinylidene(3).Single-crystal X-ray crystallography and density functional theory(DFT)calculations show that compound 3 features a pronounced Sn=Sn double bond and one lone pair of electrons at the two-coordinate Sn atom.Most strikingly,3 undergoes an interconversion with distannyne(4)upon the addition and removal of one molar equivalent of N-heterocyclic carbene.Compound 3 readily reacts with Ph_(2)C=C=O,Ad C≡P and(Al Cp^(*))_(4)to give the structurally interesting stannacycles(5,6)and an aluminyl distannyne(7),demonstrating its unique reactivity derived from the high substituent lability.

关键词： distannavinylidene silylenes stannacycles distannyne carboranes

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Potassium ferrate pretreatment promotes short chain fatty acids yield and antibiotics reduction in acidogenic fermentation of sewage sludge

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Journal of Environmental Sciences 2022年第10期34卷 41-52页

作者： zihao qiao Suyun Xu Wanqiu Zhang Shuyin Shi Wei Zhang Hongbo Liu School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai 200093China Centillion Resource Recycling(Wuxi)Co.Ltd. Wuxi 214000China

During the acidogenic fermentation converting waste activated sludge (WAS) into shortchain fatty acids (SCFA), hydrolysis of complex organic polymers is a limiting step and the transformation of harmful substances (such as antibiotics) during acidogenic fermentation is unknown. In this study, potassium ferrate (KFeO) oxidation was used as a pretreatment strategy for WAS acidogenic fermentation to increase the hydrolysis of sludge and destruct the harmful antibiotics. Pretreatment with KFeOcan effectively increase the SCFA production during acidogenic fermentation and change the distribution of SCFA components.With the dosage of 0.2 g/g TS, the maximum SCFA yield was 4823 mg COD/L, which is 28.3times that of the control group;acetic acid accounts for more than 90% of the total SCFA. The higher dosage (0.5 g/g TS) can further increase the proportion of acetic acid, but inhibit the overall performance of SCFA production. Apart from the promotion of hydrolysis and acidogenesis, KFeOpretreatment can also simultaneously oxidizes and degrades part of the antibiotics in the sludge. When the dosage is 0.5 g/g TS, the degradation efficacy of antibiotics is the most significant, and the contents of ofloxacin, azithromycin, and tetracycline in the sludge are reduced by 69%, 42%, and 50%, respectively. In addition, KFeOpretreatment can also promote the release of antibiotics from sludge flocs, which is conducive to the simultaneous degradation of antibiotics in the subsequent biological treatment process.

关键词： Acidogenic fermentation Antibiotics Potassium ferrate Oxidation pretreatment Sewage sludge Volatile fatty acids

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基于压缩感知的低复杂度超分辨角度估计方法

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系统工程与电子技术 2024年第6期46卷 1831-1837页

作者：吴敏黎子皓郝程鹏胡桥中国科学院声学研究所北京100190 中国科学院大学北京100049 西安交通大学机械工程学院陕西西安710049

在空域目标角度估计中,分辨率受阵列孔径的限制,依靠增加阵元数量提高分辨率会增加系统成本。为了在受限阵列尺寸中减少阵元数量,基于压缩感知(compressive sensing,CS)理论,提出了一种超分辨角度估计算法。首先建立阵列接收信号模型并... 详细信息

在空域目标角度估计中,分辨率受阵列孔径的限制,依靠增加阵元数量提高分辨率会增加系统成本。为了在受限阵列尺寸中减少阵元数量,基于压缩感知(compressive sensing,CS)理论,提出了一种超分辨角度估计算法。首先建立阵列接收信号模型并构造冗余字典,然后利用目标空间域稀疏先验信息将目标角度估计问题建模为优化问题,最后设计低复杂度算法对优化问题求解。所提算法通过贝叶斯CS理论推导了正则化系数,保证了算法的噪声抑制性能,通过共轭梯度运算及Hadamard乘积提高了算法效率。所提算法可利用较少快拍在信号数目未知的条件下,实现高精度角度估计。仿真结果和实测数据验证了所提算法的有效性。

关键词：阵列信号处理压缩感知波达方向估计波束形成

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K因子在ZAF迭代计算中的作用和强基体效应样品中ZAF修正系数的具体分析

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冶金分析 2024年第4期44卷 17-22页

作者：张晓峰胡晋生李明周子浩乔桥周广学钢铁研究总院有限公司捷欧路(北京)科贸有限公司中国科学院宁波材料技术与工程研究所分析测试中心中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室

ZAF法是目前电子探针(EPMA)定量分析时最常用的修正方法，其本质就是准确测量样品中每个元素的K因子，然后进行K因子的数学迭代计算(数学修正)。理解了这一修正过程，有利于操作者正确、精确地设置定量分析实验条件。对于超轻元素含量... 详细信息

ZAF法是目前电子探针(EPMA)定量分析时最常用的修正方法，其本质就是准确测量样品中每个元素的K因子，然后进行K因子的数学迭代计算(数学修正)。理解了这一修正过程，有利于操作者正确、精确地设置定量分析实验条件。对于超轻元素含量不低或基体效应强的样品，K因子和实际浓度相差较大，修正系数相应也较大，这种情形下K因子的准确测量尤为重要。本文首先对ZAF法的迭代计算数学过程进行了推导，说明K因子是ZAF定量分析的核心；通过CrTiAlC磁控溅射材料(C质量分数约为8%)的微区定量分析结果，进一步分析造成C、Al元素的K因子和实际浓度相差较大的物理原因并对ZAF修正系数的每一项进行分析，进一步理解ZAF定量的数学迭代过程，建立强基体效应样品系统下的定量分析参数设置思路。

关键词：电子探针(EPMA) K因子 ZAF迭代计算 ZAF修正系数磁控溅射材料质量吸收系数

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基于动态规划制导的无人艇自主回收控制方法

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中国舰船研究 2024年第1期19卷 264-271页

作者：郭文轩李子豪唐国元王泉斌孙江龙马杰乔瑜华中科技大学船舶与海洋工程学院湖北武汉430074 中国舰船研究设计中心湖北武汉430064 华中科技大学人工智能与自动化学院湖北武汉430074 华中科技大学能源与动力工程学院湖北武汉430074

[目的]针对欠驱动无人艇(USV)自主回收的需求,提出一种基于动态规划制导的跟踪控制方法。[方法]在运动学层面,将平行接近制导(CB)与动态窗口算法(DWA)相结合,引导USV实现目标跟踪与动态避障;在动力学层面,针对模型参数及回收环境的不确... 详细信息

[目的]针对欠驱动无人艇(USV)自主回收的需求,提出一种基于动态规划制导的跟踪控制方法。[方法]在运动学层面,将平行接近制导(CB)与动态窗口算法(DWA)相结合,引导USV实现目标跟踪与动态避障;在动力学层面,针对模型参数及回收环境的不确定性,采用径向基函数神经网络(RBFNN)设计动力学滑模控制器,实现对制导输出的跟踪控制。随后,采用Lyapunov理论对系统的稳定性进行分析。[结果]仿真结果表明,所提方法使USV具备了稳定跟踪性能,可有效规避回收过程中的动态障碍,并能自适应估计模型中的不确定因素和未知的环境干扰。[结论]所提方法展现出较强的鲁棒性与灵活性,可为USV在动态环境下的回收进行制导与目标跟踪提供参考。

关键词：欠驱动无人艇平行接近制导动态窗口法神经网络滑模控制

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不同维度碳系材料填充无规共聚聚丙烯的流变行为

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青岛科技大学学报（自然科学版） 2024年第1期45卷 100-107页

作者：李媛媛乔盼贾婷婷尚子豪胡海青青岛科技大学高分子科学与工程学院橡塑材料与工程教育部重点实验室山东青岛266042

采用熔融共混法分别制备了不同组分含量的多壁碳纳米管(MWCNTs)、少层石墨烯(FLG)和炭黑(CB)填充无规共聚聚丙烯(PPR)纳米复合材料。通过扫描电子显微镜(SEM)、毛细管流变仪、旋转流变仪等方法研究了不同聚丙烯复合材料的外观形貌及流... 详细信息

采用熔融共混法分别制备了不同组分含量的多壁碳纳米管(MWCNTs)、少层石墨烯(FLG)和炭黑(CB)填充无规共聚聚丙烯(PPR)纳米复合材料。通过扫描电子显微镜(SEM)、毛细管流变仪、旋转流变仪等方法研究了不同聚丙烯复合材料的外观形貌及流变性能。结果表明,填料的添加量和形貌都会影响其黏弹性和内部结构,其中MWCNTs的加入对PPR复合材料的黏弹性改变明显强于CB与FLG。在相同含量下,只有PPR/MWCNTs体系出现了拉伸硬化、黏弹逾渗、剪切变稀程度增加等特殊流变现象,这是高长径比MWCNTs的自身缠结及与基体间的缠结网络结构造成的。

关键词：碳系填料无规共聚聚丙烯拉伸硬化流变性能

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Effect of Plaque Composition on Biomechanical Performance of a Carotid Stent: Computational Study

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Computer Modeling in Engineering & Sciences 2018年第9期116卷 455-469页

作者： Xinyang Cui Qingshuai Ren zihao Li Kun Peng Gaoyang Li ZhaoyongGu Aike qiao College of Life Science and Bioengineering Beijing University of TechnologyNo.100PingleyuanChaoyang DistrictBeijing100022China Institute of Mechanics Chinese Academy of ScienceNo.15BeiSiHuanWest RoadBeijing100190China Graduate School of Biomedical Engineering Tohoku UniversitySendaiMiyagiJapan

Clinical application of bare metal stents is constrained by the occurrence of instent restenosis,mainly due to the complex biomechanical environment in the body.Numerical simulation method was used to evaluate the effect of plaque composition on stent performance in a carotid artery.CT angiography(CTA)data were used as a reference,and zero-load state of the carotid artery was used to establish a 3D stenotic artery model.Different plaque compositions,calcified and hypo-cellular were defined in Model 1 and Model 2,respectively.Interactions between the stents and arterial tissues within the stent crimping-expansion process were analyzed to explore the effects of plaque composition on the mechanical parameters of carotid stents.Goodman diagram and fatigue safety factor(FSF)were analyzed to explore the effects of plaque composition on fatigue performance of a carotid stent in the stent service process.In the stent crimping-expansion process,the von Mises stress in the stent and the dog-boning ratio in Model 1 were higher than that in Model 2.The calcified plaque prevented the stent from expanding the stenotic vessel to a pre-set diameter.Thus,the risk of rupture in the calcified plaque was higher than that in the hypo-cellular plaque.Plaque also affected the stress/strain in the vessel wall,which was observed to be lower in Model 1 than in Model 2.This indicated that calcified plaque could decrease the stress-induced injury of arterial tissues.Within the stent service process,the stents used in these two models were predicted to not fail under fatigue rupture as calculated by the Goodman diagram.Additionally,the points closer to the fatigue limit were generally observed at the inner bend of the stent crowns.The FSF of the stent in Model 1 was lower than that in Model 2.The stent operating in the presence of calcified plaques suffered high risk of fractures.Reliability and fatigue performance of the stent were found to be associated with plaque composition.Hence,this study may provide stent designers an approach toward

关键词： Plaque composition biomechanical carotid stent

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吉兰-巴雷综合征患者前驱感染与脑脊液蛋白-细胞分离现象的关系

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新医学 2024年第2期55卷 112-116页

作者：王子豪宋进胡铭张国荣单方振邢春叶宋艳乔保俊王玉忠山东大学齐鲁医学院济南250012 济宁医学院附属医院神经内科济宁272029

目的比较不同前驱感染阳性的吉兰-巴雷综合征(GBS)患者脑脊液蛋白-细胞分离现象以及蛋白水平差异,探讨前驱感染与GBS患者脑脊液蛋白升高的关系。方法收集198例GBS患者的临床资料以及脑脊液分析结果,使用ELISA对患者血清进行14种感染性... 详细信息

目的比较不同前驱感染阳性的吉兰-巴雷综合征(GBS)患者脑脊液蛋白-细胞分离现象以及蛋白水平差异,探讨前驱感染与GBS患者脑脊液蛋白升高的关系。方法收集198例GBS患者的临床资料以及脑脊液分析结果,使用ELISA对患者血清进行14种感染性病原体血清学检测,分析不同前驱感染的GBS患者中脑脊液蛋白-细胞分离的比例及蛋白水平的差异。结果55.1%(109/198)的GBS患者感染性病原体血清学阳性,主要为空肠弯曲菌23.7%(47/198)、甲型流感病毒20.7%(41/198)、乙型流感病毒15.2%(30/198),其中18.7%(37/198)的患者2种或以上病原体血清学阳性。73.7%(146/198)的患者存在脑脊液蛋白-细胞分离现象。在单一病原体血清学阳性患者中,空肠弯曲菌感染阳性患者的脑脊液蛋白-细胞分离现象为83.3%(25/30),甲型流感病毒感染阳性患者为100%(18/18),乙型流感病毒感染阳性患者为6/7,甲型肝炎病毒感染阳性患者为4/5,登革热病毒感染阳性患者为4/5,肺炎支原体感染阳性患者为4/4;EB病毒感染阳性、单纯疱疹病毒感染阳性、水痘带状疱疹病毒感染阳性患者各1例,均出现脑脊液蛋白-细胞分离现象;2种或以上病原体感染的患者中62.2%(23/37)出现脑脊液蛋白-细胞分离现象;无前驱感染者中66.3%(59/89)出现脑脊液蛋白-细胞分离现象。脑脊液蛋白-细胞分离现象在无前驱感染以及有不同类型前驱感染患者中的总阳性率比较差异有统计学意义(P=0.007),但脑脊液蛋白水平比较差异无统计学意义(P>0.05)。结论GBS患者中脑脊液蛋白-细胞分离现象与前驱感染的类型有关,其中甲型流感病毒感染患者发生脑脊液蛋白-细胞分离现象的比例最高。

关键词：吉兰-巴雷综合征前驱感染脑脊液蛋白-细胞分离现象

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Signal Transduction and Targeted Therapy 2022年第7期7卷 2533-2544页

作者： Xi Shi zihao Wang Wei Ren Long Chen Cong Xu Menghua Li Shiyong Fan Yuru Xu Mengbing Chen Fanjun Zheng Wenyuan Zhang Xinbo Zhou Yue Zhang Shiwei Qiu Liyuan Wu Peng Zhou Xinze Lv Tianyu Cui Yuehua qiao Hui Zhao Weiwei Guo Wei Chen Song Li Wu Zhong Jian Lin Shiming Yang Department of Pharmacy Peking University Third HospitalBeijingChina Artificial Auditory Laboratory of Jiangsu Province Xuzhou Medical UniversityXuzhouChina National Engineering Research Center for the Emergency Drug Beijing Institute of Pharmacology and ToxicologyBeijingChina College of Otolaryngology Head and Neck Surgery Chinese PLA General HospitalBeijingChina National Clinical Research Center for Otolaryngologic Diseases BeijingChina Key Lab of Hearing Science Ministry of EducationBeijingChina Beijing Key Lab of Hearing Impairment for Prevention and Treatment BeijingChina Synthetic and Functional Biomolecules Center Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringInnovation Center for GenomicsPeking UniversityBeijingChina

Inner ear disorders are a cluster of diseases that cause hearing loss in more than 1.5 billion people worldwide.However,the presence of the blood-labyrinth barrier(BLB)on the surface of the inner ear capillaries greatly hinders the effectiveness of systemic drugs for prevention and intervention due to the low permeability,which restricts the entry of most drug compounds from the bloodstream into the inner ear tissue.Here,we report the finding of a novel receptor,low-density lipoprotein receptor-related protein 1(LRP1),that is expressed on the BLB,as a potential target for shuttling therapeutics across this barrier.As a proof-ofconcept,we developed an LRP1-binding peptide,IETP2,and covalently conjugated a series of model small-molecule compounds to it,including potential drugs and imaging agents.All compounds were successfully delivered into the inner ear and inner ear lymph,indicating that targeting the receptor LRP1 is a promising strategy to enhance the permeability of the BLB.The discovery of the receptor LRP1 will illuminate developing strategies for crossing the BLB and for improving systemic drug delivery for inner ear disorders.

关键词： drugs prevention barrier

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