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In-situ coupling construction of interface bridge to enhance electrochemical stability of all solid-state lithium metal batteries

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Journal of Energy Chemistry 2024年第2期89卷 18-26,I0003页

作者： Qianwei Zhang Rong yang Chao Li Lei Mao Bohai Wang Meng Luo Yinglin Yan Yiming Zou Lisheng Zhong Yunhua Xu International Research Center for Composite and Intelligent Manufacturing Technology Institute of Chemical Power SourcesXi’an University of TechnologyXi’an 710048ShaanxiChina School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048ShaanxiChina School of Electrical Engineering Xi’an University of TechnologyXi’an 710048ShaanxiChina Yulin University Yulin 719000ShaanxiChina

Polymer-based composite electrolytes composed of three-dimensional Li_(6.4)La_(3)Zr_(2)Al_(0.2)O_(12)(3D-LLZAO)have attracted increasing attention due to their continuous ion conduction and satisfactory mechanical ***,the organic/inorganic interface is incompatible,resulting in slow lithium-ion transport at the ***,the compatibility of organic/inorganic interface is an urgent problem to be *** by the concept of“gecko eaves”,polymer-based composite solid electrolytes with dense interface structures were *** bridging of organic/inorganic interfaces was established by introducing silane coupling agent(3-chloropropyl)trimethoxysilane(CTMS)into the PEO-3D-LLZAO(PL)*** in-situ coupling reaction improves the interface affinity,strengthens the organic/inorganic interaction,reduces the interface resistance,and thus achieves an efficient interface ion transport *** prepared PEO-3D-LLZAO-CTMS(PLC)electrolyte exhibits enhanced ionic conductivity of 6.04×10^(-4)S cm^(-1)and high ion migration number(0.61)at 60℃and broadens the electrochemical window(5.1 V).At the same time,the PLC electrolyte has good thermal stability and high mechanical ***,the Li Fe PO_(4)|PLC|Li battery has excellent rate performance and cycling stability with a capacity decay rate of 2.2%after 100 cycles at 60℃and 0.1 *** advantages of PLC membranes indicate that this design approach is indeed practical,and the in-situ coupling method provides a new approach to address interface compatibility issues.

关键词： Organic/inorganic interphase Coupling effect Composite electrolyte Interface compatibility

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Calculation of Hydro-Dynamic Stability of the Soil Inside Bucket in the Process of Bucket Foundation Penetration

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China Ocean Engineering 1998年第4期13卷 427-434页

作者： yang, SG Xu, T Meng, ZY Ren, gy Tianjin Univ Dept Ocean Engn Tianjin 300072 Peoples R China

The offshore platform with bucket foundations is a;new type of offshore platform that distinguishes from traditional template platforms by replacing driven piles with bucket foundations. The suction penentration of bucket foundation is a complicated hydro-dynamic process. The key of this process is the seepage field caused by the difference of pressure applied on purpose inside and outside the bucket. The appearance and developement of seepage field has a decisive influence on the suction penetration process. In this study, the finite element analysis method is applied to the dynamic simulation of the seepage field of suction penetration of bucket foundation. A criterion is suggested to distinguish the hydro-dynamic stability of the soil inside the bucket according to the critical hydraulic gradient method. The reliability of the model and its applicability to engineering practice have been proved through comparison between the results of model test and finite element calculation.

关键词： offshore structures bucket foundation finite element method seepage field soil stability

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Enhancement of catalytic activity for hydrogenation of nitroaromatic by anionic metal-organic framework

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Chinese Chemical Letters 2024年第3期35卷 144-148页

作者： Qi Wu Anyang Li Ruibo He Yaxi Wu Lei Hou Guoping yang Wenyan Zhang Yao-Yu Wang Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi'an 710127China

Nitroaromatic hydrogenation catalysis without precious metals remains a longstanding *** rate of electron transfer is the crucial factor affecting hydrogenation ***,an ionic Cd-based metal-organic framework(I-Cd-MOF)exhibiting a unique structure with one-dimensional(1D)opening nanochannels and good electron transfer ability was synthesized for catalyzing hydrogenation of 4-nitrophenol(4-NP).The catalytic activity of the unique I-Cd-MOF without noble metals is detected,which is higher than most reported noble metal ***,the reaction rate of I-Cd-MOF(4.28 min^(-1))is about 47.6 times higher than that of the Cd-based neutral MOF(N-Cd-MOF)with the similar crystalline *** chromatograph mass spectrometer(LC-MS)and theoretical results demonstrate that 4-NP and five intermediates are stabilized in the channels of I-Cd-MOF,which increases the possibility of contact with H^*and H_(2)g enerated at the Cd *** I-Cd-MOF was extended to other nitroaromatic hydrogenation catalysis,which still displays excellent *** importantly,the I-MOF@Filter membrane was successfully constructed for continuous hydrogenation catalytic reactions,which maintains a high catalytic performance after 7 cycles of recycling without *** work fills in the application of the I-MOFs in hydrogenation catalytic reactions and provides an effective way for the rapid and green degradation of nitroaromatic compounds.

关键词： Anions Metal-organic frameworks Catalysis Electron transfer Hydrogen production

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Sandwich-type composited solid polymer electrolytes to strengthen the interfacial ionic transportation and bulk conductivity for all-solid-state lithium batteries from room temperature to 120℃

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Journal of Energy Chemistry 2024年第8期95卷 288-295,I0007页

作者： Jiewen Tan Zhen Wang Jiawu Cui Zhanhui Jia Wensheng Tian Chao Wu Chengxin Peng Chengyong Shu Kang yang Wei Tang School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano) State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an 710049ShaanxiChina State Key Laboratory of Space Power-sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Top-Energy Digital Manufacturing Technologies(Xi'an)Co. Ltd.Xi'an 710100ShaanxiChina

The insurmountable charge transfer impedance at the Li metal/solid polymer electrolytes(SPEs)interface at room temperature as well as the ascending risk of short circuits at the operating temperature higher than the melting point,dominantly limits their applications in solid-state batteries(SSBs).Although the inorganic filler such as CeO_(2)nanoparticle content of composite solid polymer electrolytes(CSPEs)can significantly reduce the enormous charge transfer impedance at the Li metal/SPEs interface,we found that the required content of CeO_(2)nanoparticles in SPEs varies for achieving a decent interfacial charge transfer impedance and the bulk ionic conductivity in *** this regard,a sandwich-type composited solid polymer electrolyte with a 10%CeO_(2)CSPEs interlayer sandwiched between two 50%CeO_(2)CSPEs thin layers(sandwiched CSPEs)is constructed to simultaneously achieve low charge transfer impedance and superior ionic conductivity at 30℃.The sandwiched CSPEs allow for stable cycling of Li plating and stripping for 1000 h with 129 mV polarized voltage at 0.1 mA cm^(-2)and 30℃.In addition,the LiFePO_(4)/Sandwiched CSPEs/Li cell also exhibits exceptional cycle performance at 30℃and even elevated120℃without short *** multi-layered CSPEs with optimized contents of the inorganic fillers can be an efficient method for developing all solid-state PEO-based batteries with high performance at a wide range of temperatures.

关键词： PEO-based solid electrolytes CeO_(2)nanoparticles Charge transfer impedance Sandwich-type composite electrolytes All-solid-state Li metal batteries

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Sources appointment and health risks of PM_(2.5)-bound trace elements in a coastal city of southeastern China

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Journal of Environmental Sciences 2024年第4期138卷 561-571页

作者： Ziyi Lin Xiaolong Fan Gaojie Chen Youwei Hong Mengren Li Lingling Xu Baoye Hu Chen yang Yanting Chen Zhiqian Shao Jinsheng Chen Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy ofSciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Minnan Normal University Zhangzhou 363000China

To gain a comprehensive understanding of sources and health risks of trace elements in an area of China with high population densities and low PM_(2.5)concentrations,15 trace elements(Al,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Sn,Ba,Pb)in PM_(2.5)were monitored from December 2020 to November 2021 in a representative city,*** concentrations of trace elements in Xiamen displayed an obvious seasonal variation and were dominated by K,Fe,Al,Ca and *** on Positive Matrix Factorization analysis,source appointment revealed that the major sources of trace elements in Xiamen were traffic,dust,biomass and firework combustion,industrial manufacture and shipping *** to health risk assessment combined with the source appointment results,it indicated that the average noncarcinogenic risk was below the threshold and cancer risk of four hazardous metals(Cr,Ni,As,Pb)exceeded the threshold(10^(-6)).Traffic-related source had almost half amount of contribution to the health risk induced by PM_(2.5)-bound trace *** the dust transport period or Spring Festival period,the health risks exceeded an acceptable threshold even an order of magnitude higher,suggesting that the serious health risks still existed in low PM_(2.5)environment at certain *** risk assessment reminded that the health risk reduction in PM_(2.5)at southeastern China should prioritize traffic-related hazardous trace elements and highlighted the importance of controlling vehicles emissions in the future.

关键词： PM_(2.5)-bound trace elements Seasonal variations Source appointment Health risks Traffic-related source

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Observation of Arctic surface currents using data from a surface drifting buoy

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Acta Oceanologica Sinica 2024年第1期43卷 70-79页

作者： Hongxia Chen Lina Lin Long Fan Wangxiao yang Yinke Dou Bingrui Li Yan He Bin Kong Guangyu Zuo Na Liu First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural ResourcesQingdao 266061China Naval Research Academy Tianjin 300061China College of Electrical and Power Engineering Taiyuan University of TechnologyTaiyuan 030024China Polar Research Institute of China Shanghai 443005China

During the 10th Chinese Arctic scientific expedition carried out in the summer of 2019,the surface current in the high-latitude areas of the Arctic Ocean was observed using a self-developed surface drifting buoy,which was initially deployed in the Chukchi *** buoy traversed the Chukchi Sea,Chukchi Abyssal Plain,Mendeleev Ridge,Makarov Basin,and Canada Basin over a period of 632 *** returning to the Mendeleev Ridge,it continued to drift toward the ***,the track of the buoy reflected the characteristics of the transpolar drift and Chukchi Slope Current,as well as the inertial flow,cross-ridge surface flow,and even the surface disorganized flow for some time *** results showed that:(1)the transpolar drift mainly occurs in the Chukchi Abyssal Plain,Mendeleev Ridge,and western Canada Basin to the east of the ridge where sea ice concentration is high,and the average northward flow velocity in the region between 79.41°N and 86.32°N was 5.1 cm/s;(2)the average surface velocity of the Chukchi Slope Current was 13.5 cm/s,and while this current moves westward along the continental slope,it also extends northwestward across the continental slope and flows to the deep sea;and(3)when sea ice concentration was less than 50%,the inertial flow was more significant(the maximum observed inertial flow was 26 cm/s,and the radius of the inertia circle was 3.6 km).

关键词： Chinese National Arctic Research Expedition(CHINARE) surface drifting buoy transpolar drift Chukchi Slope Current inertial flow

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苏皖地区汉族人群不稳定型心绞痛患者与血小板反应素4基因A387P多态性的关系

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中国组织工程研究与临床康复 2007年第39期11卷 7736-7738页

作者：高磊何国平马继政杨国英顾君肖建强徐波柏庆利翁伟进张寄南江苏大学附属武进医院心内科江苏省常州市213002 南京医科大学第一附属医院心血管病研究所江苏省南京市210029

目的:观察血小板反应素4基因G29926C(A387P)多态性与中国苏皖地区汉族人群不稳定型心绞痛的可能关系。方法:选择2004-11/2006-05在南京医科大学第一附属医院和江苏大学附属武进医院住院不稳定型心绞痛患者110例,病例均符合2002年AHA/AC... 详细信息

目的:观察血小板反应素4基因G29926C(A387P)多态性与中国苏皖地区汉族人群不稳定型心绞痛的可能关系。方法:选择2004-11/2006-05在南京医科大学第一附属医院和江苏大学附属武进医院住院不稳定型心绞痛患者110例,病例均符合2002年AHA/ACC关于不稳定型心绞痛诊断指南的诊断标准,同期选择337例非冠心病者为对照。酚-氯仿法提取白细胞DNA,应用聚合酶链反应-限制性片段长度多态性方法分析血小板反应素4A387P多态性,取部分PCR扩增产物进一步测序鉴定,比较两组间多态性频率分布差异,探讨血小板反应素4基因多态性与不稳定型心绞痛发病的可能关系。结果:447例均进入结果分析。GC基因型在不稳定型心绞痛组和对照组的分布无统计学差异(5.5%,7.1%,P=0.54),未检测到CC纯合子。C等位基因频率在不稳定型心绞痛组和对照组分别为2.7%,3.6%(P=0.55)。GC基因型与不稳定型心绞痛无显著性关联(OR=0.75,95%CI:0.30￣1.89,P=0.54)。结论:血小板反应素4基因387A→P不是中国苏皖地区汉族人群常见的多态位点,且与不稳定型心绞痛的发病无显著相关性。

关键词：血小板反应素基因多态性不稳定型心绞痛

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完备的IBE密码学逆向防火墙构造方法

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软件学报 2024年第7期35卷 3482-3496页

作者：赵一刘行明洋杨波长安大学信息工程学院陕西西安710064 陕西师范大学计算机科学学院陕西西安710119

斯诺登事件后,以算法替换攻击为代表的后门攻击带来的威胁受到广泛关注.该类攻击通过不可检测的篡改密码协议参与方的算法流程,在算法中嵌入后门来获得秘密信息.为协议参与方配置密码学逆向防火墙(cryptographic reverse firewall,CRF)... 详细信息

斯诺登事件后,以算法替换攻击为代表的后门攻击带来的威胁受到广泛关注.该类攻击通过不可检测的篡改密码协议参与方的算法流程,在算法中嵌入后门来获得秘密信息.为协议参与方配置密码学逆向防火墙(cryptographic reverse firewall,CRF)是抵抗算法替换攻击的主要手段.基于身份加密(identity-based encryption,IBE)作为一种广泛应用的公钥加密体制,亟需构建合适的CRF方案.然而,已有工作仅实现了CRF再随机化的功能,忽视了将用户私钥直接发送给作为第三方的CRF的安全风险.针对上述问题,首先给出适用于IBE的CRF安全性质的形式化定义和安全模型.其次提出可再随机化且密钥可延展的无安全信道IBE(rerandomizable and keymalleable secure channel free IBE,RKM-SFC-IBE)的形式化定义并给出传统IBE转化为RKM-SFC-IBE以及增加匿名性的方法.最后基于RKM-SFC-IBE给出对应CRF的一般性构造方法,并给出标准模型下IBE方案的CRF构造实例与性能优化方法.与已有工作相比,提出完备的适用于IBE的CRF安全模型,给出一般构造方法,明确为表达力更强的加密方案构造CRF时的基本原则.

关键词：算法替换攻击密码学逆向防火墙无安全信道的基于身份加密安全保持性

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Student Academic Performance Predictive Model Based on Dual-stream Deep Network

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计算机科学 2024年第10期51卷 119-128页

作者： XIE Hui ZHANG Pengyuan DONG Zexiao yang Huiting KANG Huan HE Jiangshan CHEN Xueli Center for Biomedical-photonics and Molecular Imaging Xi’an Key Laboratory of Intelligent Sensing and Regulation of trans-Scale Life InformationSchool of Life Science and TechnologyXidian UniversityXi’an 710126China Engineering Research Center of Molecular and Neuro Imaging Ministry of EducationXi’an 710126China Innovation Center for Advanced Medical Imaging and Intelligent Medicine Guangzhou Institute of TechnologyXidian UniversityGuangzhou 510550China

Blended teaching is one of the essential teaching methods with the development of information *** a learning effect evaluation model is helpful to improve students’academic performance and helps teachers to better implement course ***,a lack of evaluation models for the fusion of temporal and non-temporal behavioral data leads to an unsatisfactory evaluation *** meet the demand for predicting students’academic performance through learning behavior data,this study proposes a learning effect evaluation method that integrates expert perspective indicators to predict academic performance by constructing a dual-stream network that combines temporal behavior data and non-temporal behavior data in the learning *** this paper,firstly,the Delphi method is used to analyze and process the course learning behavior data of students and establish an effective evaluation index system of learning behavior with universality;secondly,the Mann-Whitney U-test and the complex correlation analysis are used to analyze further and validate the evaluation indexes;and lastly,a dual-stream information fusion model,which combines temporal and non-temporal features,is *** learning effect evaluation model is built,and the results of the mean absolute error(MAE)and root mean square error(RMSE)indexes are 4.16 and 5.29,*** study indicates that combining expert perspectives for evaluation index selection and further fusing temporal and non-temporal behavioral features that for learning effect evaluation and prediction is rationality,accuracy,and effectiveness,which provides a powerful help for the practical application of learning effect evaluation and prediction.

关键词： Blended teaching Expert perspective indicators Two-stream information fusion model

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Preparation　of　YSZ　Microporous　Membranes　on　Porous　α-Alumina　with　Metal　chlorides　as　Precursor

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Chemical Research in Chinese Universities 1997年第3期13卷 268-275页

作者： Peng, DK Liu, T yang, PH Xia, CR Meng, gy UNIV SCI & TECHNOL CHINA DEPT MAT SCI & ENGNHEFEI 230026PEOPLES R CHINA

ＰｒｅｐａｒａｔｉｏｎｏｆＹＳＺＭｉｃｒｏｐｏｒｏｕｓＭｅｍｂｒａｎｅｓｏｎＰｏｒｏｕｓα－ＡｌｕｍｉｎａｗｉｔｈＭｅｔａｌｃｈｌｏｒｉｄｅｓａｓＰｒｅｃｕｒｓｏｒＰＥＮＧＤｉｎｇ－ｋｕｎ，ＬＩＵＴａｏ，ＹＡＮＧＰｉ... 详细信息

ＰｒｅｐａｒａｔｉｏｎｏｆＹＳＺＭｉｃｒｏｐｏｒｏｕｓＭｅｍｂｒａｎｅｓｏｎＰｏｒｏｕｓα－ＡｌｕｍｉｎａｗｉｔｈＭｅｔａｌｃｈｌｏｒｉｄｅｓａｓＰｒｅｃｕｒｓｏｒＰＥＮＧＤｉｎｇ－ｋｕｎ，ＬＩＵＴａｏ，ＹＡＮＧＰｉｎｇ－ｈｕａ，ＸＩＡＣｈａｎｇ－ｒ...

关键词： YSZ Preparation Alumina Membranes Metal Microporous Porous Precursor

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