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Coke Collapse Model and Collapse Profile Variation Law for Bell-Less Top BF

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Journal of Iron and Steel Research International 2011年第10期18卷 8-12页

作者： WU Sheng-li FU chang-liang liu cheng-song XU Jian KOU Ming-yin School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

The mathematical model of minimum safety factor that investigated the collapse trends of coke layer under different charging parameters was established firstly on the basis of the slope stabilization theory in soil mechanics, and then the model of burden profile after coke collapse was improved by adopting the predetermination of quadratic curve and energy correction methods. The research will provide theoretical evidences for describing the coke profile more accurately and technical direction for choosing suitable charging parameters of blast furnace. The results show that： it is helpful to improve the stability of coke layer with increasing chute inclining angle and length of the coke flat; when the main falling point of ore moves toward furnace wall or the coke flat is wider, the curve radian of burden profile after coke collapse becomes smaller; the ore to coke ratio distribution agrees with the gas top temperature measurement well under considering coke collapse comparing with the result of ignoring coke collapse.

关键词： blast furnace coke layer stability safety factor coke collapse burden profile

Intramyocardial dissection with concomitant left ventricular aneurysm as a rare complication of myocardial infarction： a case report

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Journal of Geriatric Cardiology 2016年第7期13卷 632-635页

作者： chang-cheng liu Liang-Shan WANG Zhao-Ping SU Ying ZHAO cheng-Xiong GU Academic Department of Cardiovascular Surgery Beijing Anzhen Hospital Beijing Institute of Heart Long and Blood Vessel Diseases Capital Medical University Beijing China Epidemiology and Health Statistics Academy of Public Health and Management Weifang Medical University Weifang Shandong China Department of Ultrasound Beijing Anzhen Hospital Capital Medical University Beijing China

We describe a rare case of a 60-year-old woman suffering from intramyocardial dissection and left ventricular aneurysm secondary to acute myocardial infarction. A rare form of ventricular septal rupture resulted from intramyocardial dissection deterioration, which was iden- tified during echocardiographic follow-up. Surgical repair under beating-heart cardiopulmonary bypass was successful.

关键词： Aneurysm Complication Dissection Left ventricle Myocardial infarction

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含砂量对砂−细粒混合土一维蠕变行为的影响

岩土力学 2023年第12期44卷 3370-3382,3511页

作者：常留成王红雨王亚曹静宁夏大学土木与水利工程学院宁夏银川750021

利用一维固结蠕变试验研究了宁夏中部黄土高原淤地坝前砂−细粒混合土的蠕变特性,结合压汞试验结果探讨了含砂量对其蠕变特性的影响作用机制。借鉴Yin-Graham一维等效时间线弹黏塑模型的理论框架,同时考虑一维条件下蠕变的有限性和蠕变... 详细信息

利用一维固结蠕变试验研究了宁夏中部黄土高原淤地坝前砂−细粒混合土的蠕变特性,结合压汞试验结果探讨了含砂量对其蠕变特性的影响作用机制。借鉴Yin-Graham一维等效时间线弹黏塑模型的理论框架,同时考虑一维条件下蠕变的有限性和蠕变系数的衰减性,建立了适用于描述淤地坝前砂−细粒混合土应力−应变−时间关系的经验蠕变模型。研究结果表明:含砂量小于28.57%时,次固结系数和次固结变形与含砂量呈负相关,细颗粒决定着砂−细粒混合土的蠕变性;含砂量超过28.57%后,次固结系数和次固结变形随含砂量增加逐步增大,砂−细粒混合土的蠕变性和砂性土相似。所建模型的预测曲线和一维蠕变试验曲线吻合良好,说明该模型适用于一维条件下砂−细粒混合土蠕变特性的描述。

关键词：砂?细粒混合土含砂量一维固结蠕变经验模型

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不同温度下红黏土胀缩性试验研究

长江科学院院报 2019年第7期36卷 100-105页

作者：彭慈德常留成上海建工设计研究总院有限公司上海200030 东华理工大学建筑工程学院南昌330013

为了探究温度对红黏土胀缩性的影响,通过不同温度下红黏土的胀缩性试验(膨胀变形和收缩变形试验),以初始含水率和干密度为对比变量,分析红黏土胀缩性;并通过红黏土的收缩变形试验分析温度对红黏土体缩率、最终线缩率和收缩系数的影响规... 详细信息

为了探究温度对红黏土胀缩性的影响,通过不同温度下红黏土的胀缩性试验(膨胀变形和收缩变形试验),以初始含水率和干密度为对比变量,分析红黏土胀缩性;并通过红黏土的收缩变形试验分析温度对红黏土体缩率、最终线缩率和收缩系数的影响规律。试验结果表明:膨胀率随着初始含水率的变化而变化,干密度最大的试样的膨胀率增幅最明显,干密度最小的试样的膨胀率却随着初始含水率的增加而减小;随着温度的升高,膨胀率总体呈增大趋势,膨胀率在 80℃之前缓慢增长,超过 80℃时增长较快;随着温度的升高,线缩率、体缩率、收缩系数总体呈现递减的趋势;不同温度下红黏土随着含水率的降低,收缩曲线大致可以分为斜直线阶段、外凸阶段和直线稳定阶段共 3个阶段,各阶段的收缩速度和收缩变化幅度不同。研究成果可为研究红黏土胀缩性的岩土工程技术人员提供参考。

关键词：红黏土温度膨胀率线缩率体缩率收缩系数

Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo En Ning chang liu Yu-Chi liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

高分辨率太阳吸收光谱二氧化碳反演中参数的敏感性分析

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光谱学与光谱分析 2017年第7期37卷 1997-2003页

作者：单昌功刘诚王薇孙友文刘文清田园杨维中国科学技术大学环境科学与光电技术学院安徽合肥230031 中国科学技术大学地球与空间科学学院安徽合肥230031 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室安徽合肥230031

基于高分辨率傅里叶变换红外太阳吸收光谱可以准确测量大气中二氧化碳的柱总量。基于光谱反演算法中的前向模型,分析了改变前向模型中不同参数和不同天顶角情况下对反演结果的影响及其原因。选取具有代表性的两天的测量光谱,改变前向模... 详细信息

基于高分辨率傅里叶变换红外太阳吸收光谱可以准确测量大气中二氧化碳的柱总量。基于光谱反演算法中的前向模型,分析了改变前向模型中不同参数和不同天顶角情况下对反演结果的影响及其原因。选取具有代表性的两天的测量光谱,改变前向模型中连续体倾斜量值、内部视场角、零偏置和多普勒效应四个模型参数,观察不同先验模型参数的扰动对二氧化碳测量结果的影响。结果表明,不同模型参数的扰动引起反演的二氧化碳柱平均干空气混合比(XCO_2)相对偏差并不一样;不同的测量时间,相同参数扰动引起的二氧化碳含量相对偏差也不同。其中连续体倾斜量值的变化对反演结果的影响最大,其变化引起的相对偏差波动范围在0.1%~0.2%之间;内部视场角、零偏置和多普勒效应的变化对反演结果影响较小,引起的二氧化碳的相对偏差分别在-0.045%~0.02%,-0.045%~0.015%和-0.03%~0.04%之间。最后用二氧化碳反演平均核解释了反演误差来源。研究结果对光谱反演算法中模型参数的设定和提高测量的准确度提供了理论依据。

关键词：模型参数傅里叶变换红外光谱敏感性分析二氧化碳

Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： Wei Xiong Xuan Ye Hongzhang cheng Xiaoming liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3D） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

Geology and mineralization of the Tiegelongnan supergiant porphyry-epithermal Cu(Au, Ag) deposit(10 Mt) in western Tibet, China: A review

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China Geology 2022年第1期5卷 136-159页

作者： Huan-huan Yang Qin Wang Yan-bo Li Bin Lin Yang Song Yi-yun Wang Wen He Hong-wei Li She Li Jian-li Li chang-cheng liu Shi-bin Feng Tang Xin Xue-lian Fu Xin-juan Liang Qi Zhang Bei-qi Wang Yang Li MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China College of Earth Sciences Chengdu University of TechnologyChengdu 610059China No.5 Geological Brigade of the Tibet Bureau of Geology and Mineral Exploration and Development Golmud 816000China chengdu Center of China Geological Survey Ministry of Natural ResourcesChengdu 610081China Chinalco Tibet Mining Co. Ltd.Lhasa 850000China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China

The Tiegelongnan Cu(Au,Ag)deposit in central Tibet contains more than 10 Mt of copper ranking 29 th in the *** is characterized by typical porphyry-epithermal alteration and *** order to improve the understanding of porphyry-epithermal copper deposit in Tibet,new zircon U-Pb age and sulfur isotope data along with published data in the Tiegelongnan are presented to investigate the formation and preservation ***-related intrusive rocks in the Tiegelongnan including Early Cretaceous(about 120 Ma)granodiorite porphyry and diorite porphyry are closely related to the northward subduction of Bangongco-Nujiang *** mainly comes from deep magma,and ore-forming fluid is affected by both magmatic and meteoric *** metallogenic setting of Tiegelongnan is consistent with those of Andean porphyry copper deposits in South *** cover of the Meiriqiecuo Formation volcanic rocks,Lhasa-Qiangtang collision and India-Eurasian collision have significance in the preservation and uplift of the *** formation,preservation and discovery of Tiegelongnan play an important role in exploration of ancient porphyry-epithermal deposits in Tibet.

关键词： Giant porphyry-epithermal copper deposit Mineralization and alteration Formation and preservation mechanism Tiegelongnan Duolong ore district Early Cretaceous Mineral exploration engineering Bangongco-Nujiang metallogenic belt Tibet

Observation of topological charge transformations in acoustic vortex using passive periodic systems

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie liu changqing Xu Da-Jian Wu Ying cheng Xiao-Jun liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure