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固废砂粉再生混凝土力学及耐久性能影响因素

山西建筑 2025年第3期51卷 26-32页

作者：曹瑞雪中铁四局集团建筑工程有限公司安徽合肥230031

建筑垃圾如混凝土、玻璃和钢材等主要成分已有具体的回收方案,但再生利用过程中作为主要副产物的固废砂粉缺乏有效的回收利用途径。以量大面广的混凝土粉和废弃砖粉为对象,综述了固废砂粉物理、化学性质等因素对再生混凝土力学及耐久性... 详细信息

建筑垃圾如混凝土、玻璃和钢材等主要成分已有具体的回收方案,但再生利用过程中作为主要副产物的固废砂粉缺乏有效的回收利用途径。以量大面广的混凝土粉和废弃砖粉为对象,综述了固废砂粉物理、化学性质等因素对再生混凝土力学及耐久性能的影响。结果表明:固废砂粉颗粒的水化反应活性主要受微粉自身特性和配比设计控制;混凝土的水胶比、砂粉的置换比、再生微粉粒径、细度等参数显著影响着再生混凝土的力学及耐久性能。

关键词：建筑垃圾固废砂粉再生混凝土力学性能耐久性能

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碳排放权交易制度的权利逻辑与规范进路

河北大学学报（哲学社会科学版） 2025年第1期50卷 123-134页

作者：柯坚曹辰武汉大学环境法研究所湖北武汉430072

当下我国碳排放权交易制度体系正在经历着由政策引领向法治构建的转变。目前碳排放权交易制度行政立法中简单将“权利”与“配额”等同的做法,既无法体现碳排放权所兼具的公法、私法双重特征,也难以有效回应碳排放权交易市场的发展需求... 详细信息

当下我国碳排放权交易制度体系正在经历着由政策引领向法治构建的转变。目前碳排放权交易制度行政立法中简单将“权利”与“配额”等同的做法,既无法体现碳排放权所兼具的公法、私法双重特征,也难以有效回应碳排放权交易市场的发展需求以及完善碳排放权交易制度的规范构建。为此,需要构建以碳排放权交易市场为语境、以碳排放“权利”为逻辑主线的碳排放权交易制度,夯实其法治基础并明确其规范进路。从语境与语义出发,“碳排放权”的表述本身就意味着其私法的权利属性。在碳排放权交易制度的理论逻辑层面,双阶理论可以为碳排放权交易制度中“配额”到“权利”的过渡提供理论支撑;在其实践逻辑层面,碳排放权交易制度需要借助“权利”的确立为其交易市场的展开提供法治的基础。最后,考虑到碳排放权权利属性共识不足、碳排放权交易制度结构尚待稳定、权利基础呈现多元特征以及权利来源并非稳固不变等因素,策略上可以考虑暂时搁置碳排放权权属争议,以权益为抓手、以“权益表现—适用规范领域—法律保护方式”为主线,分步骤、分阶段推进碳排放权交易制度的规范构建。

关键词：碳排放权权益配额权利逻辑规范进路

Constructing Pr-doped CoOOH catalytic sites for efficient electrooxidation of 5-hydroxymethylfurfural

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Journal of Energy chemistry 2025年第1期 234-244页

作者： Botao Fan Hao Zhang Bang Gu Feng Qiu Qiue cao Wenhao Fang School of chemical Science and Technology Yunnan University national Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University

Electrocatalytic conversion of renewable biomass is emerging as a promising route for sustainable chemical production;hence it urgently calls for developing efficient electrocatalysts with low potentials and high current ***,a Pr-doped Co（OH）2hexagonal sheet （Pr/Co=1/9,in mole） is synthesized by electrodeposition as highly performant catalyst for 5-hydroxymethylfurfural （HMF） oxidation reaction（HMFOR） to produce 2,5-furandicarboxylic acid （FDCA）.This novel and low-cost catalyst possesses a rather low onset potential of 1.05 V （***） and requires only 1.10 V （***） to reach a current density of 10 mA cm-2for HMFOR,significantly outperforming Co（OH）2benchmark (i.e.,210 mV higher to reach10 m A cm-2).The origin of Pr promotion effect as well as the evolution of CoOOH catalytic sites and HMFOR process has been deeply elucidated by physical characterizations,kinetic experiments,in situ electrochemical techniques,and theoretical *** unique Pr-ameliorated CoOOH active centers enable 100%conversion of HMF,99.6%selectivity of FDCA,and 99.7%Faraday efficiency,with a superior cycling durability toward *** can be one of the most outstanding results for Co-based HMFOR catalysts to date in the *** this work can help open up new horizons for constructing novel and efficient Co-based electrocatalysts by the utilization of lanthanide elements.

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深板层角膜移植与穿透性角膜移植治疗基质角膜营养不良预后的比较

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中国组织工程研究 2025年第8期29卷 1626-1633页

作者：静如意陈颖欣曹蕾北部战区总医院辽宁省沈阳市110000

背景:基质角膜营养不良的传统手术治疗方式为穿透性角膜移植,近年来越来越多的医生开始考虑使用深板层角膜移植治疗基质角膜营养不良。目前国内对比穿透性角膜移植和深板层角膜移植治疗基质角膜营养不良的研究少有报道。目的:比较深板... 详细信息

背景:基质角膜营养不良的传统手术治疗方式为穿透性角膜移植,近年来越来越多的医生开始考虑使用深板层角膜移植治疗基质角膜营养不良。目前国内对比穿透性角膜移植和深板层角膜移植治疗基质角膜营养不良的研究少有报道。目的:比较深板层角膜移植和穿透性角膜移植治疗基质角膜营养不良的疗效。方法:选择2000年1月至2018年1月北部战区总医院收治的基质角膜营养不良患者57例(57眼),男18例,女39例,平均年龄(52.9±20.0)岁,按照手术治疗方式分为深板层角膜移植组(n=21)、穿性角膜移植组(n=36),术后随访观察最佳矫正视力、角膜内皮细胞密度、角膜植片透明度、术中及术后并发症、原病复发情况。结果与结论:①两组患者术后1,3,6,12个月的视力均高于术前(P0.05);随着术后时间的延长,两组患者角膜内皮细胞密度逐渐降低,穿透性角膜移植组患者术后6,12个月的角膜内皮细胞密度年丢失率均高于深板层角膜移植组(P0.05);②深板层角膜移植组有6例出现并发症,穿透性角膜移植组有14例出现并发症,57例患者术后12个月内均无复发,两组患者术后5年的复发率比较差异无显著性意义(P>0.05),穿透性角膜移植组和深板层角膜移植组术后5年的移植物存活率分别为83%和86%,组间比较差异无显著性意义(P>0.05);③结果表明,基质角膜营养不良的治疗可考虑使用深板层角膜移植替代一部分穿透性角膜移植。

关键词：穿透性角膜移植深板层角膜移植基质角膜营养不良最佳矫正视力角膜植片透明度角膜内皮细胞密度并发症复发

有限元分析冠状动脉新型刻痕球囊的安全性及有效性

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中国组织工程研究 2025年第10期29卷 2083-2090页

作者：曹政郑晓新蒋学俊武汉大学人民医院心内科武汉大学心血管病研究所心血管病湖北省重点实验室湖北省武汉市430060

背景:目前临床上使用的冠状动脉介入预扩张球囊主要是传统的高压球囊、乳突球囊等,它们在病变血管中可能会出现滑脱进而擦伤血管的情况。目的:评估新型旋刻球囊在血管扩张中的安全性及有效性。方法:(1)有限元分析:通过采集相关人体组织... 详细信息

背景:目前临床上使用的冠状动脉介入预扩张球囊主要是传统的高压球囊、乳突球囊等,它们在病变血管中可能会出现滑脱进而擦伤血管的情况。目的:评估新型旋刻球囊在血管扩张中的安全性及有效性。方法:(1)有限元分析:通过采集相关人体组织数据建立血管三维有限元模型,随后建立乳突球囊植入血管三维有限元模型与旋刻球囊植入血管三维有限元模型,分析不同充气压下球囊扩张时的血管应力、血管位移、球囊应力、球囊位移。(2)动物实验:将8只新西兰大耳兔随机分成2组,在髂动脉中分别植入乳突球囊与旋刻球囊进行扩张,每组4只。球囊撤出后取材,苏木精-伊红染色与透射电镜观察血管损伤情况。结果与结论:(1)有限元分析:两种球囊的弹力性质无明显差异,在相同充气压下,乳突球囊组血管应力、血管位移、球囊应力、球囊位移均远远大于旋刻球囊组,并且各指标的均匀性优于旋刻球囊组;随着充气压的增加,乳突球囊组血管应力、血管位移、球囊应力、球囊位移增加幅度远远大于旋刻球囊组。(2)动物实验:苏木精-伊红染色与透射电镜观察显示,旋刻球囊扩张造成的血管损伤只局限在内膜,而乳突球囊扩张造成的血管损伤比较严重,内膜、中膜损伤严重,部分节段可以看到血肿形成,血管周围的炎性细胞较多,局部可见有巨噬细胞堆积。(3)结果表明:相较于乳突球囊扩张,旋刻球囊扩张造成血管闭塞以及夹层的风险较小,但有一定出现球囊弯曲的概率。

关键词：冠状动脉粥样硬化预扩张新型扩张球囊血管损伤有限元分析旋刻球囊

Condition monitoring and fault diagnosis of industrial robots: A review

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Science ch.na Technological Sciences 2025年第1期 121-145页

作者： Yaguo LEI Huan LIU naipeng LI Junyi cao Yuting QIAO Hongbo WAnG Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi'an Jiaotong University

Health management of industrial robots is paramount for maintaining effective operations, ensuring consistent performance, minimizing downtime, and ultimately enhancing the safety and productivity of robotic systems. Since the invention of industrial robots, significant efforts have been dedicated to their health management. In recent years, thanks to advances in condition monitoring and fault diagnosis technologies of industrial robots, robot health management has shifted from scheduled maintenance to condition-based maintenance. This paper aims to comprehensively review the evolution of condition monitoring and fault diagnosis technologies that are critical for implementing condition-based maintenance of industrial robots. A brief introduction to robotic systems is given first to analyze the robot failure modes and their corresponding root causes. next, the data acquisition strategies and commonly used sensors of industrial robots are ***, the development of robot condition monitoring and fault diagnosis technologies are reviewed, with an emphasis on the remarkable achievements and challenges in model-based and data-driven methods. Finally, the paper summarizes the challenges facing this research field and provides potential avenues for future advancements.

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Photo-and electro-production of narrow exotic states:From light quarks to charm and up to bottom

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Frontiers of physics 2023年第4期18卷 71-94页

作者： Xu cao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China University of ch.nese Academy of Sciences Beijing 100049China Research Center for Hadron and CSR Physics Lanzhou University and Institute of Modern Physics of CASLanzhou 730000China

Accessing a full image of the inner content of hadrons represents a central endeavour of modern particle physics,with the main scientific motivation to investigate the strong interaction binding the visible *** the one hand,the structure of known exotic candidates is a fundamental open issue addressed widely by *** the other hand,looking for new states of exotic nature is a central component for theoretical and experimental efforts from electron-positron mach.ne and electron accelerator with fixed target to heavy ion and electron-ion *** this article we present a succinct short overview of the attempt to search for exotic narrow n∗and Z states containing light quarks only or also charm,and its connotation for bottom regions(the latter two are also known as Pc(Zc)and Pb(Zb)states,respectively in the literature).We address the effort of search.ng for exotic narrow n∗and Z states in light quark *** focus on recent progress in search.ng for signal of Pc and Zc states photoproduction and its implication into the Pb and Zb photoproduction and their decay *** also discuss future perspectives for the field in electron-ion colliders,a good place to disentangle the nature of some of these states and investigate some other enlightening topics including QCD trace anomaly and quarkonium-nucleon scattering length.

关键词： exotic states photo-and electro-production electron-ion colliders hadron

Synergistic depression mech.nism of Ca^(2+) ions and sodium silicate on bastnaesite flotation

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Journal of Rare Earths 2022年第6期40卷 988-995,I0006页

作者： Zhao cao Zeyu ch.ng Jieliang Wang Yongdan cao Institute of Mining Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China State Key Laboratory of Mineral Processing Beijing 100160China Inner Mongolia Key Laboratory of Mining Engineering Baotou 014010China

Bastnaesite is an important rare earth mineral and is usually beneficiated by *** silicate is commonly used to depress calcium-bearing gangue minerals,however it can also depress bastnaesite when Ca^(2+) ions exist in the *** this study,the effect of Ca^(2+) ions and sodium silicate individually or in combination on bastnaesite flotation was studied through micro-flotation,zeta potential,fluorescence spectroscopy and X-ray photoelectron spectroscopy(XPS) ***-flotation results show that the combination of Ca^(2+) ions and sodium silicate depresses bastnaesite more severely due to their synergistic *** potential results show that the combination renders the surface potential of bastnaesite negatively shifted more *** spectroscopy shows that the combination decreases the surface hydrophobicity of bastnaesite more *** shows that the combination increases the adsorption of sodium silicate on bastnaesite by forming hydrophilic Ca-SiO_(3) precipitate,which causes more serious depression on bastnaesite flotation.

关键词： Bastnaesite Flotation Sodium silicate Ca^(2+)ions Synergistic depression Rare earths

An explicit compound Poisson process-based shock deterioration model for reliability assessment of aging structures

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第3期9卷 461-472页

作者： cao Wang School of Civil Mining and Environmental EngineeringUniversity of WollongongWollongongNW 222Austalia Department of Civil Engineering Monash UniversityClaytonVic 3800Australia

Existing structures may suffer from resistance deterioration due to repeated attacks. The modeling of resistance deterioration is a critical ingredient in the reliability assessment and service life prediction of these degraded structures. In this paper, an explicit compound Poisson process-based model is developed to describe the shock deterioration of structural resistance, where the magnitude of each shock deterioration increment is modeled by a Gamma-distributed random variable. The moments(mean value and variance) and the distribution function of the cumulative shock deterioration are derived in a closed form, based on a proposed W-function. A method for the efficient calculation of the W-function is presented,which reduces to the Bessel type I function if the shock deterioration increment is exponentially distributed(a special case of Gamma distribution). The proposed shock deterioration model is applicable to either a stationary or a nonstationary Poisson process of random ***, the overall resistance deterioration is modeled as the linear combination of gradual and shock deteriorations, based on which the proposed model can be used in the timedependent reliability assessment of aging structures efficiently. A numerical example is presented to demonstrate the applicability of the proposed deterioration model by estimating the time-dependent reliability of an aging bridge. It is found that a smaller threshold for the degraded resistance leads to greater mean value and standard deviation of the time to failure,and this effect is enhanced by a smaller occurrence rate of the shock deterioration.

关键词： Structural reliability Resistance degradation Compound Poisson process shock deterioration W-function