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Journal of Energy Chemistry 2024年第10期97卷 371-378,I0007页

作者： Juntao Si Xiaoying Li yixuan Li kuo Cao yiran Zhu Chunhua Chen CAS Key Laboratory of Precision and Intelligent Chemistry Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

The lithium metal anode is hailed as the desired "holy grail" for the forthcoming generation of highenergy-density batteries,given its astounding theoretical capacity and low ***,the formation and growth of dendrites seriously compromise battery life and ***,an yttriastabilized bismuth oxide(ySB) layer is fabricated on the polypropylene(PP) separator,where ySB reacts with Li anode in-situ in the cell to form a multi-component composite interlayer consisting of Li_(3)Bi,Li_(2)O,and y_(2)O_(3).The interlayer can function not only as a redistributor to regulate Li^(+) distribution but also as an anion adsorber to increase the Li^(+) transference number from 0.37 to 0.79 for suppressing dendrite nucleation and ***,compared with the cell with a baseline separator,those with modified separators exhibit prolonged lifespan in both Li/Li symmetrical cells and Li/Cu ***,the full cells coupled with ultrahigh-loading LiFePO_(4) display an excellent cycling performance of 1700 cycles with a high capacity retention of ~80% at 1 C,exhibiting great potential for practical *** work provides a feasible and effective new strategy for separator modification towards building a much-anticipated dendrite-free Li anode and realizing long-lifespan lithium metal batteries.

关键词： Lithium metal battery Separator Dendrite-free Multifunctional interlayer Conversion-alloying reaction

Damage characteristics of yAg transparent ceramics under different loading conditions

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Defence Technology（防务技术） 2022年第8期18卷 1394-1404页

作者： kuo Bao Xian-feng Zhang gui-ji Wang Jia-jie Deng Tao Chong Dan Han Bing-qiang Luo meng-ting Tan School of Mechanical Engineering Nanjing University of Science&TechnologyNanjing210094China Institute of Fluid Physics CAEPMianyang621900China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai200050China

yAg (y_(3)Al_(5)O_(12)) transparent ceramics have attractive application prospects for transparent armor protection modules because of their excellent light transmittance and anti-ballistic capability. Understanding the fracture behavior and damage mechanism of yAg is necessary for armor design. To explore the damage characteristics of yAg under compression and tension, shock compression and shockless spalling experiments with soft recovery technique are conducted. The spall strength of yAg is obtained and the recovered samples are observed by CT and SEM. It is shown that the macroscopic damage characteristic of yAg under compression is vertical split cracks with oblique fine cracks distributed in the entire sample, while that under tension is horizontal transgranular cracks concentrated near the main spall surface. The cracks generated by macroscopic compression, tension and shear stress extend in similar tensile form at the microscale. The proportion of transgranular fractures on spall surfaces is higher than that of cracks induced by macroscopic compression. Meanwhile, higher loading rate and longer loading duration increase the transgranular fracture percentage.

关键词： yAg transparent Ceramics Damage characteristics Impact loading Shock compression Spall strength

Prediction of the effectiveness of rolling dynamic compaction using artificial neural networks and cone penetration test data

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岩石力学与工程学报 2019年第1期38卷 153-170页

作者： R.A.T.M.Ranasinghe M.B.Jaksa F.Pooya Nejad y.L.kuo School of Civil Environmental and Mining EngineeringUniversity of Adelaide

Rolling Dynamic Compaction(RDC),which is a ground improvement technique involving non-circular modules drawn behind a tractor,has provided the construction industry with an improved ground compaction capability,especially with respect to a greater influence depth and a higher speed of compaction,resulting in increased productivity. However,to date,there is no reliable method to predict the effectiveness of RDC in a range of ground conditions. This paper presents a new and unique predictive tool developed by means of artificial neural networks(ANNs) that permits a priori prediction of density improvement resulting from a range of ground improvement projects that employed 4-sided RDC modules;commercially known as"impact rollers". The strong coefficient of correlation(i.e. R>0.86) and the parametric behavior achieved in this study indicate that the model is successful in providing reliable predictions of the effectiveness of RDC in various ground conditions.

关键词： soil mechanics rolling dynamic compaction artificial neural networks cone penetration test ground improvement

Correlation between microstructure and mechanical properties of columnar crystals in the directionally solidified Mg-gd-y-Er alloy

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Journal of Magnesium and Alloys 2022年第3期10卷 806-818页

作者： D.R.Fang S.S.Zhao X.P.Lin T.Chai y.kuo H.Sun y.Dong School of Materials Science and Engineering Northeastern UniversityNo.11Alley 3Wenhua RoadHeping DistrictShenyangChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China

The Mg-4.58gd-0.45y-0.01 Er alloys with different volume fractions of columnar crystals in hard orientation(orientation factor ofbasal plane slip system is less than 0.2)were prepared by changing the pulling rate to regulate the crystal growth *** tests were performed on the Mg-4.58gd-0.45y-0.01 Er alloy at room temperature,and the structure after deformation was investigated by electron backscatter diffraction(EBSD).Subsequently,the strengthening mechanism of columnar crystals in hard orientation was *** results show if orientation factors ofbasal plane slip system of columnar crystals are all greater than 0.4(soft orientation),the alloy has low yield strength σ_(s)(64 MPa),but great work hardening ability,and ultimate tensile strength σ_(b) and elongationδare 114 MPa and 37.3%,*** orientation factors ofbasal plane slip system of columnar crystals are all less than 0.2(hard orientation),the alloy has high strength(σ_(s),125 MPa),but poor plasticity(δ,6.32%).If the"hard orientation"and the"soft orientation"columnar crystals are arranged alternately along the direction perpendicular to the crystal growth,the alloy has both superior strength(σ_(s),102 MPa)and excellent plasticity(δ,22.5%)at room *** improved comprehensive mechanical property can be attributed to two *** the one hand,the"hard orientation"columnar crystals can prevent the"soft orientation"crystals deforming,so the strength is *** the other hand,the"hard orientation"columnar crystals themselves can withstand a certain amount of deformation to retain appropriate plasticity.

关键词： Directional solidification Mg-gd-y-Er alloy Hard orientation Mechanical prop

Product of Toeplitz Operators on the Harmonic Dirichlet Space

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Acta Mathematica Sinica,English Series 2012年第5期28卷 1033-1040页

作者： Lian kuo ZHAO School of Mathematics and Computer Science Shanxi Normal University

In this paper, we study Toeplitz operators with harmonic symbols on the harmonic Dirichlet space, and show that the product of two Toeplitz operators is another Toeplitz operator only if one factor is constant.

关键词： Harmonic Dirichlet space Toeplitz operator zero product

Coating behavior and surface hardening of Pd_(77)Cu_6Si_(17) thin film metallic glass on AZ31 magnesium alloy

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第12期14卷 898-905页

作者： X.H.DU y.C.CHANg H.J.PEI B.y.CHEN M.C.kuo J.C.HUANg School of Materials Sciences and Engineering Shenyang Aerospace University Department of Materials and Optoelectronic Science National Sun Yat-Sen University Department of Materials Engineering Kun Shan University

Pd77Cu6Si17(PCS) thin film metallic glasses(TFMgs) with high glass forming ability and hardness were selected as a hard coating for improving the surface hardness of AZ31 magnesium alloy. Both microindentation and nanoindentation tests were conducted on specimens with various PCS film thicknesses from 30 to 2000 nm. The apparent hardness and the relative indentation depth(β) were integrated using a quantitative model. The interaction parameters involved and relative hardness values were extracted from iterative calculations. According to the results, surface hardness can be enhanced greatly by PCS TFMgs in the shallow region, followed by gradual decrease with increasing β ratio. In addition, specimens with thinner coatings(e.g., 200nm) showed greater substrate-film interaction and those with thick coatings(e.g., 2000nm) became prone to film cracking. The optimum TFMg coating thickness in this study was estimated to be around 200 nm.

关键词： Thin film metallic glass(TFMg) Magnesium alloy Sputtering process Nanoindentation Coating thickness

应激生活事件和社会支持对大学生抑郁风险预警阈值研究

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中国健康心理学杂志 2024年第2期32卷 269-277页

作者：刘爱楼张阔湖北师范大学教育科学学院黄石435002 青岛理工大学人文与外国语学院

目的:抑郁是青少年最常见的情绪问题。其中,近期应激和社会支持是影响大学生抑郁的关键危险性因素和保护性因素,本研究探索这两个关键因素与大学生抑郁关系中可能存在的阈值效应,以期为提升抑郁风险预测的精准性和有效性,以及发展抑郁... 详细信息

目的:抑郁是青少年最常见的情绪问题。其中,近期应激和社会支持是影响大学生抑郁的关键危险性因素和保护性因素,本研究探索这两个关键因素与大学生抑郁关系中可能存在的阈值效应,以期为提升抑郁风险预测的精准性和有效性,以及发展抑郁风险预警系统提供科学依据。方法:整群抽取我国中部H省3所地方普通本科高校2018-2022年入学的14043名本科生进行调查研究。采用SPSS 26.0对数据进行描述性统计分析、相关分析和线性回归分析,并采用R3.5.2进行分段回归模型(PRM)探索应激生活事件和社会支持对大学生抑郁的预测阈值。结果:①应激生活事件、社会支持与抑郁之间存在显著的两两相关,其中,社会支持与应激生活事件、抑郁存在显著的负相关(P<0.01),应激生活事件与抑郁存在显著的正相关(P<0.01);②应激生活事件的阈值达到42.055后,应激生活事件对抑郁水平的诱发作用愈发显著。而社会支持水平的阈值达到18.318后,社会支持对抑郁水平的抑制作用受到削弱;③根据应激生活事件和社会支持对抑郁的阈值效应可将大学生群体分为4组,高应激生活事件低社会支持组和高应激生活事件高社会支持组的大学生抑郁水平显著高于低应激生活事件低社会支持组和低应激生活事件高社会支持组(P<0.05),且高应激生活事件低社会支持组学生的抑郁水平又显著高于高应激生活事件高社会支持组学生(P<0.05);④4个组别的大学生在性别上的分布也存在显著差异(χ^(2)=129.014,P<0.001),高应激生活事件低社会支持组的男生占比(43.7%)明显高于总体样本中男生的比例(30.1%)。结论:应激生活事件、社会支持与大学生抑郁之间存在阈值效应,根据阈值效应分类的高应激生活事件低社会支持组大学生的抑郁水平更为严重;应激生活事件低于42.055阈值水平,社会支持高于18.318的阈值时,大学生的抑郁情绪会得到明显缓解。

关键词：抑郁应激生活事件社会支持阈值分段回归大学生

Application of artificial neural networks for predicting the impact of rolling dynamic compaction using dynamic cone penetrometer test results

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Journal of Rock Mechanics and geotechnical Engineering 2017年第2期9卷 340-349页

作者： R.A.T.M. Ranasinghe M.B. Jaksa y.L. kuo F. Pooya Nejad School of Civil Environmental and Mining EngineeringUniversity of AdelaideAdelaideAustralia

Rolling dynamic compaction(RDC),which involves the towing of a noncircular module,is now widespread and accepted among many other soil compaction ***,to date,there is no accurate method for reliable prediction of the densification of soil and the extent of ground improvement by means of *** study presents the application of artificial neural networks(ANNs) for a priori prediction of the effectiveness of *** models are trained with in situ dynamic cone penetration(DCP) test data obtained from previous civil projects associated with the 4-sided impact *** predictions from the ANN models are in good agreement with the measured field data,as indicated by the model correlation coefficient of approximately *** is concluded that the ANN models developed in this study can be successfully employed to provide more accurate prediction of the performance of the RDC on a range of soil types.

关键词： Rolling dynamic compaction(RDC) ground improvement Artificial neural network(ANN) Dynamic cone penetration(DCP) test

Thick Film Circuit Materials

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功能材料 1992年第5期 265-269页

作者： Charles C.y.kuo CTS Corporation 7 Swanson Manor Elkhart IN 46516 USA 本刊通讯编委 7 Swanson Manor Elkhart IN 46516 USA

THICK FILM CIRCUITS most commonly involve the screen printing process of forming a functional composition through a patterned mesh screen onto *** ceramics. The printed film is dried and fired, typically in the range of 500 to 900 ℃ (930 to 1650°F) to sinter the film and adhere it ro the substrate with the desired characteristics for circuit applications. The functional compositions in general include conductors, resistors, and dielectrics. The dielectrics may be used as overglazes, crossovers, capacitors, or multilayers. The term thick film originated from the term thin film. Thin films are deposited by vacuum technology, either by evaporation or sputtering. In the early 1960s, the Bell Tele-

关键词： high

genetic programming for predictions of effectiveness of rolling dynamic compaction with dynamic cone penetrometer test results

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Journal of Rock Mechanics and geotechnical Engineering 2019年第4期11卷 815-823页

作者： R.A.T.M.Ranasinghe M.B.Jaksa F.Pooya Nejad y.L.kuo School of Civil Environmental and Mining Engineering The University of Adelaide

Rolling dynamic compaction (RDC),which employs non-circular module towed behind a tractor,is an innovative soil compaction method that has proven to be successful in many ground improvement *** involves repeatedly delivering high-energy impact blows onto the ground surface,which improves soil density and thus soil strength and ***,there exists a lack of methods to predict the effectiveness of RDC in different ground conditions,which has become a major obstacle to its *** this,in this context,a prediction model is developed based on linear genetic programming (LgP),which is one of the common approaches in application of artificial intelligence for nonlinear *** model is based on in situ density-related data in terms of dynamic cone penetrometer (DCP) results obtained from several projects that have employed the 4-sided,8-t impact roller (BH-1300).It is shown that the model is accurate and reliable over a range of soil ***,a series of parametric studies confirms its robustness in generalizing *** addition,the results of the comparative study indicate that the optimal LgP model has a better predictive performance than the existing artificial neural network (ANN) model developed earlier by the authors.

关键词： ground improvement Rolling dynamic compaction (RDC) Linear genetic programming (LgP) Dynamic cone penetrometer (DCP) test