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International Journal of Mining Science and Technology 2018年第4期28卷 662-670页

作者： Rihong cao Hang Lin Ping cao School of Resources and Safety Engineering Central South University State Key Laboratory for Geo Mechanics and Deep Underground Engineering China University of Mining & Technology

The strength and failure characteristics of most natural rock mass are influenced by discontinues such as fissures, joints, and weak surfaces. In the present study, the strength and failure behavior of ubiquitous- joint rock-l!ke specimens under uniaxial loading have been investigated by DIC （digital image correlation） and discrete element numerical method （PFC2D）. The results are obtained. Firstly, the UCSJ of spec- imens with γ= 15° or 30° shows similar tendency while α goes from 0° to 75°. With γ= 45° or 60°, the UCSJ of specimens increases when α goes from 0° to 30° and decreases after α goes beyond 30°. With γ=75°, the peak UCSJ value is reached when α=0°. The UCSJ value shows an increasing trend when α goes from 60° to 75°. Secondly, the ubiquitous-joint specimens present different failure modes for various levels of α and γ（β-α）. Based on the experimental results, the failure mode of ubiquitous-joint specimens can be classified into three categories： stepped path failure, failure through parallel plane, and failure through cross plane.

关键词： Ubiquitous-joint Digital speckle correlation technique PFC2D Strength Failure mode

Progress in studying entanglement and steering from the macroscopic view

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Science China(Physics,Mechanics & Astronomy) 2021年第1期64卷 114-115页

作者： Ye cao School of Physics Beijing Institute of TechnologyBeijing 100081China

Magnons,the collective excitation of magnetically ordered materials,have attracted considerable interest for their low energy consumption,long coherence time and useful working frequency from gigahertz to ***,magnons can coherently interact with phonons,microwave and optical photons,as well as superconducting qubits,as schematically depicted in Figure 1,providing a novel platform to achieve hybrid quantum systems[1].Hybridizing distinct quantum systems with multitasking capabilities is critical in quantum information processing,because a single quantum system cannot keep pace with the fast development of quantum information and satisfy the requirement of building perfect quantum information networks[2].The emergying field cavity spintronics has inspired many interesting physics like nonreciprocal microwave propagation and energy level attraction,together with quite a few applications such as magnon sensors and magnon-photon transducers.

关键词： quantum microwave Figure

OBTAINING THE CRITICAL DRAW RATIO OF DRAW RESONANCE IN MELT SPINNING FOR POWER LAW POLYMER FLUIDS

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Chinese Journal of Polymer Science 2007年第5期25卷 501-507页

作者： Jinan cao Industrial Research Institute Swinburne Swinburne University of Technology P.O. Box 218 Hawthorn Victoria 3122 Australia

A direct difference method has been developed for Non-Newtonian power law fluids to solve the simultaneous non-linear partial differential equations of melt spinning, and to determine the critical draw ratio for draw resonance. The results show that for shear thin fluids, the logarithm of the critical draw ratio has a well defined linear relationship with the power index for isothermal and uniform tension melt spinning. When the power index approaches zero, the critical draw ratio points at unity, indicating no melt spinning can be processed stably for such fluids. For shear thick fluids, the critical draw ratio increases in a more rapid way with increasing the power index.

关键词： Draw resonance Melt spinning Power law fluid Numerical simulation.

Application of Rare Earths in Thermal Barrier Coating Materials

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Journal of Materials Science & Technology 2007年第1期23卷 15-35页

作者： Xueqiang cao Key Lab of Rare Earth Chemistry and Physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences.Changchun 130022 China

Rare earths are a series of minerals with special properties that make them essential for applications including miniaturized electronics, computer hard disks, display panels, missile guidance, pollution controlling catalysts, H2-storage and other advanced materials. The use of thermal barrier coatings （TBCs） has the potential to extend the working temperature and the life of a gas turbine by providing a layer of thermal insulation between the metallic substrate and the hot gas. Yttria （Y203）, as one of the most important rare earth oxides, has already been used in the typical TBC material YSZ （yttria stabilized zirconia）. In the development of the TBC materials, especially in the latest ten years, rare earths have been found to be more and more important. All the new candidates of TBC materials contain a large quantity of rare earths, such as R2Zr207 （R=La, Ce, Nd, Gd）, CeO2-YSZ, RMeAI11019 （R=La, Nd; Me=Mg, Ca, Sr） and LAP04. The concept of double-ceramic- layer coatings based on the rare earth materials and YSZ is effective for the improvement of the thermal shock life of TBCs at high temperature.

关键词： Rare earth Thermal barrier coatings Gas turbine

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东欢坨矿架棚巷道沿空留巷技术研究

煤炭科技 2025年 112-119页

作者：韩猛刘炜楠李广汉郭宝龙 cao Chen 开滦(集团)有限责任公司东欢坨矿业分公司辽宁工程技术大学矿业学院

为实现传统架棚支护条件下的沿空留巷,以东欢坨矿20221工作面架棚巷道作为研究对象,建立力学模型计算不同情况下的煤柱弯矩。根据现场实际代入相关数值得出,在整个结构稳定的情况下,拱外悬臂梁长度不得大于6m,搭接长度不小于4.5 m,此时... 详细信息

为实现传统架棚支护条件下的沿空留巷,以东欢坨矿20221工作面架棚巷道作为研究对象,建立力学模型计算不同情况下的煤柱弯矩。根据现场实际代入相关数值得出,在整个结构稳定的情况下,拱外悬臂梁长度不得大于6m,搭接长度不小于4.5 m,此时的支护强度满足要求。设计架棚巷道沿空留巷的工艺,并对工程效果进行了分析。受巷道底板岩性影响,巷道变形主要以底鼓和两帮移近为主,架后顶板几乎无下沉。测点位于采面前时,底鼓平均速率为5 mm/d;位于面后0～35 m时,处于底鼓激增区,平均速率62 mm/d;与工作面距离>35 m后,平均速率为15 mm/d;目前未见稳定区域,治理以清卧为主。0处为两帮位移突变点,突变数值在280～320 mm,0～91 m处于两帮位移激增区,平均速率12.29 mm/d;91～200 m处于两帮位移缓增区,平均速率为2.5 mm/d,大于200 m时,速率<1 mm/d。

关键词：架棚支护沿空留巷力学模型

Cathodic behavior of molten CaCl_2-cao and CaCl_2-NaCl-cao

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International Journal of Minerals,Metallurgy and Materials 2010年第6期17卷 791-794页

作者： Shu-lan Wang Wei Wang Shi-chao Li Shan-hui cao Department of Chemistry Northeastem University Shenyang 110004 China

The cathodic behavior of molten CaCl2, CaCl2-cao and equimolar CaCl2-NaCl-cao was studied by cyclic voltammograms and constant potential polarization at temperatures of 1123 to 1173 K on molybdenum and titanium electrodes. The diffusion coefficient of Ca2＋（cao） in molten CaCl2-cao was calculated from the linear relationship between the square root of scan rate and the peak current density. The deposition potentials and the potential temperature coefficient of cao in molten CaCl2-0.5mol%cao and CaCl2-NaCl-0.5mol%cao were also obtained from their cyclic voltammograms. The result shows that cao is more easily reduced than CaCl2. The addition of NaCl in molten CaCl2-cao induces the underpotential electrodeposition of cao.

关键词： molten salts calcium oxide cyclic voltammetry polarization

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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

带有记忆项的双曲型Cahn-Hilliard方程时间依赖拉回吸引子的存在性

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应用数学 2025年第1期38卷 130-142页

作者：曹宇宇姜金平刘丹延安大学数学与计算机科学学院陕西延安716000

本文研究具有惯性项和记忆项的Cahn-Hilliard方程在时间依赖速度传播作用下解的长时间行为.通过采用渐近先验估计和压缩函数的方法,得到了在时间依赖空间中,具有惯性项和记忆项的Cahn-Hilliard方程的拉回吸引子的存在性.

关键词： Cahn-Hilliard方程记忆项时间依赖拉回吸引子压缩函数

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

Condition monitoring and fault diagnosis of industrial robots: A review

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Science China 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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