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Journal of Iron and Steel Research International 2016年第4期23卷 344-349页

作者： hua-dong FU Yuan-ke MO Long-chao ZHUO Zhi-hao ZHANG Jian-xin xie Institute for Advanced Materials and Technology University of Science and Technology Beijing School of Materials Science and Engineering Xi'an University of Technology

Deformation behaviors and mechanisms under different temperatures for columnar-grained Fe 6.5Si （mass%） alloys fabricated by directional solidification and equiaxed grained Fe-6.5Si alloy fabricated by forging were comparatively investigated. The results showed that, with increasing the deformation temperature from 300℃ to 500℃, the elongation increased from 2.9% to 30.1% for the equiaxed-grained Fe-6.5Si alloy, while from 6.6% to about 51% for the columnar-grained Fe-6.5Si alloy. The deformation mode of equiaxed-grained Fe 6.5Si alloy trans ferred from nearly negligible plastic deformation to large plastic deformation dominated by dislocation slipping. Comparatively, the deformation mode of the columnar grained alloy transferred from nearly negligible plastic deformation to plastic deformation dominated by the twining, and finally to plastic deformation dominated by dislocation slipping. Meanwhile, compared with the alloy with equiaxed grains, it was found that ultimate tensile strength and elongation could be increased simultaneously, which was ascribed for the twinning deformation in columnar-grained Fe-6.5Si al loy. This work would assist us to further understand the plastic deformation mechanism of Fe-6.5Si alloy and pro vide more clues for high-efficiency production of the alloy.

关键词： Fe-6.5Si alloy deformation behavior microstructure control mechanical property tensile deformation

Effect of Warm Rolling on Micro-deformation Behavior and Mechanical Properties of Columnar-grained Fe-6.5 mass%Si Alloy

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Journal of Iron and Steel Research International 2016年第3期23卷 225-230页

Micro-deformation behavior and mechanical properties of columnar-grained Fe-6.5 mass%Si alloy before and after warm rolling were investigated by means of micro-indentation and three-point bending *** results show that the columnar-grained Fe-6.5mass%Si alloy before warm rolling presents sink-in mode of micro-indentation,while pile-up mode with a number of arc-shaped deformation bands exists in the warm-rolled *** with that of the alloy before warm rolling,the maximum bending fracture stress and maximum bending fracture deflection of the warm-rolled alloy are increased by 96% and 50%,*** different micro-deformation behavior and mechanical properties of the columnar-grained Fe-6.5mass%Si alloy are ascribed to the changes of dislocation density,dislocation configuration and long-range order degree,which significantly improve the room temperature plasticity of the alloy after warm rolling.

关键词： Fe-6.5mass%Si alloy warm rolling micro-deformation mechanical property

Warm/cold rolling processes for producing Fe-6.5wt% Si electrical steel with columnar grains

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International Journal of Minerals,Metallurgy and Materials 2013年第6期20卷 535-540页

作者： hua-dong Fu Zhi-hao Zhang Hong-jiang Pan Yuan-ke Mo Jian-xin xie Institute for Advanced Materials and Technology University of Science and Technology Beijing School of Materials Science and Engineering Tsinghua University

A new technical prototype for producing Fe-6.5wt% Si electrical steel sheets by directional solidification, heat treatment before rolling, warm rolling, and cold rolling was proposed in the present study. The formability of Fe-6.5wt% Si electrical steel before rolling and the reasonable process parameters of this technical prototype were obtained. Experimental results reveal that the formability of Fe-6.5wt% Si electrical steel is improved significantly under the combination of directional solidification and heat treatment before rolling. Fe-6.5wt% Si electrical steel sheets with the thickness of 0.15 ram, bright surface, few edge cracks, and high rolling yield can be successfully fabricated using this technology without any intermediate annealing during the whole rolling. The combination of directional solidification, heat treatment before rolling, warm rolling, and cold rolling can work as a new process for highly efficient and compact fabrication of Fe-6.5wt% Si electrical steel sheets.

关键词： silicon steel deformation rolling mechanical properties plasticity

Mechanisms and applications of layer/spinel phase transition in Li-and Mn-rich cathodes for lithium-ion batteries

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Rare Metals 2022年第5期41卷 1456-1476页

作者： Wei He Qing-Shui xie Jie Lin Bai-hua Qu Lai-Sen Wang dong-Liang Peng State Key Laboratory of Physical Chemistry of Solid Surface Fujian Key Laboratory of Materials GenomeCollaborative Innovation Center of Chemistry for Energy MaterialsCollege of MaterialsXiamen UniversityXiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518000China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China

Li-and Mn-rich(LMR)cathode materials have received tremendous attention due to the highly reversible specific capacity(>250 m Ah·g^(-1)).In the analysis of its crystal structure,the two-phase composite model gains increasing acceptance,and the phase transition behaviors in LMR cathode materials have been extensively ***,the structure controversy of LMR cathode materials,and the mechanisms of phase transition are ***,the causes of initiating or accelerating the phase transition of LMR cathode materials have been summarized into three main driving forces,i.e.,the electrochemical driving force,the component driving force and the thermodynamic driving ***,the applications of phase transition behavior in improving the electrochemical performance of LMR cathode materials,including the construction of spinel surface coating and spinel/layered hetero-structure are discussed.

关键词： Li-and Mn-rich cathode material Two-phase composite model Phase transition Spinel/layered hetero-structure

Opti mization and Model of Laminar Cooling Control Systemfor Hot Strip Mills

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Journal of Iron and Steel Research International 2006年第1期13卷 18-22页

作者： xie Hai-bo LIU Xiang-hua WANG Guo-dong ZHANG Zhong-ping State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China School of Mechanical Engineering Nanhua University Hengyang 421001 Hunan China Hot Strip Mill Panzhihua Iron and Steel （Group） Co Panzhihua 617062 Sichuan China

The structure of laminar cooling control system for hot rolling was introduced and the control mode, cooling strategy, segment tracking and model recalculation were analyzed. The parameters of air/water cooling models were optimized by regressing the data gathering in situ, and satisfactory effect was obtained. The coiling temperature can be controlled within ±15℃.

关键词： hot rolled strip laminar cooling control system model parameter optimization

Periodic dividends and capital injections for a spectrally negative Lévy risk process under absolute ruin

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Applied Mathematics(A Journal of Chinese Universities) 2020年第3期35卷 349-358页

作者： dong hua ZHAO Xiang-hua School of Statistics Qufu Normal UniversityQufu 273165China

The spectrally negative Lévy risk model with random observation times is considered in this paper,in which both dividends and capital injections are made at some independent Poisson observation *** the absolute ruin,the expected discounted dividends and the expected discounted capital injections are *** also study the joint Laplace transforms including the absolute ruin time and the total dividends or the total capital *** the results are expressed in scale functions.

关键词： Spectrally negative Lévy risk model Randomized observation Barrier dividend Capital injection Absolute ruin

融合语义分割与模糊推理的无人机应急降落选址算法

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计算机工程与应用 2025年第01期61卷 174-185页

作者：李迪肖敏任东谢咏昶姚远三峡大学计算机与信息学院三峡大学湖北省农田环境监测工程技术研究中心

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应，对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题，提出了一种实时语义分割网络与模糊推理相结合的降落选址算法（STD... 详细信息

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应，对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题，提出了一种实时语义分割网络与模糊推理相结合的降落选址算法（STDC-LSSNet）。考虑到潜在危险因素在航拍图像上占比小、易被错误分割的问题，提出了小目标特征提取模块（small target feature capture module,STFCM），通过计算不同尺度特征的相似性并进行权重分配，强化小目标特征的表达。考虑到安全区域与危险区域边界混淆会导致无人机降落存在巨大风险，提出了边界特征融合模块（boundary feature fusion module,BFFM），将浅层网络由拉普拉斯卷积得到的边界信息与深层网络的语义信息进行特征融合，引入注意力机制，增强边界区域特征的表达。通过对分割得到的图像进行模糊推理，从而精确识别应急降落地点。所提算法在公开数据集Semantic Drone和AeroScapes上与最先进的算法进行了广泛的对比实验，mIoU提升1.72个百分点和3.89个百分点，实时分割速度达到210 FPS，选址的速度达到58.62 ms，实现了无人机在复杂情况下的应急降落选址。

关键词：无人机自主降落实时语义分割模糊推理注意力机制

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从洪洞三交河左木剖面看汾河下游30Ka以来的环境变迁

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山西师范大学学报（自然科学版） 2001年第1期15卷 73-76页

作者：李旭红马志正韩军青卫华董艳谢爱红山西师范大学地理系山西临汾041004

在汾河下游第四纪地质剖面观察的基础上 ,选择了具有代表性的洪洞三交河左木剖面 ,利用沉积物相变方法 ,对沉积物进行分析 .认为汾河下游三万年以来环境有四次大的变化 ,其中后两次变化 ,时间分别为 8Ka- 2 .5Ka B.P和 2 .5Ka以来 ,共... 详细信息

在汾河下游第四纪地质剖面观察的基础上 ,选择了具有代表性的洪洞三交河左木剖面 ,利用沉积物相变方法 ,对沉积物进行分析 .认为汾河下游三万年以来环境有四次大的变化 ,其中后两次变化 ,时间分别为 8Ka- 2 .5Ka B.P和 2 .5Ka以来 ,共有 5次小的波动 ,由此推测 ,今后百年内气候继续变暖 ,波动周期为 30 a- 40 a.

关键词：洪洞三交河左木盆地末次盛冰期环境变迁沉积物相变方法气候变化

COMPLETE MONOTONICITY OF THE PROBABILITY OF RUIN AND DE FINETTI'S DIVIDEND PROBLEM

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Journal of Systems Science & Complexity 2012年第1期25卷 178-185页

作者： hua dong Chuancun YIN School of Mathematical Sciences Qufu Normal University School of Mathematical Science and Computing Technology Central South University

This paper studies the complete monotonicity of the probability of ruin in the the classical risk model and the classical risk model that is perturbed by a diffusion. As a byproduct, the authors give an alternative p... 详细信息

关键词： Barrier strategy classical risk model complete monotonicity log-convexity optimaldividend problem perturbed classical risk model.

Seed-aided green synthesis of metal-organic frameworks in water

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Green Chemical Engineering 2023年第1期4卷 64-72页

作者： Hao-Tian An Xin Zhang Chen dong Mu-Yao Lu Rui Li Yabo xie Lin-hua xie Jian-Rong Li Beijing Key Laboratory for Green Catalysis and Separation and Department of Environmental Chemical Engineering Faculty of Environment and LifeBeijing University of TechnologyBeijing100124China

Green synthesis of metal-organic frameworks(MOFs)in water with alleviated environmental influence and reduced cost is an essential step to transfer laboratory MOFs research to industrial *** from the commonly used organic solvents to pure water encounters challenges of the poor solubility of organic linkers,slow reaction kinetics,and the formation of polymorphic *** far,a universal MOFs synthetic strategy in water system has yet to be *** study reports the seed-aided synthesis of eleven MOFs with diverse compositions and structures while pure water serving as *** corresponding reaction temperature and time of using this new strategy were reduced compared with original synthetic approaches,while the products maintain porous structure and high *** success of this strategy relies on the addition of parent MOFs as seeds which could promote crystallization process by skipping the time-consuming induction period and avoiding the formation of polymorphic impurities.

关键词： Metal-organic frameworks Carbon neutrality Coal bed methane Greenhouse gas Fossil fuel