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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang Bao Qiuyue Hao Heng zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

A novel multi-fidelity coupled simulation method for flow systems

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Chinese Journal of Aeronautics 2013年第4期26卷 868-875页

作者： Wang peng zheng Yun Zou zhengping Qi lei Zhou Zhixiang National Key Laboratory of Science & Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beihang University Aeroengine Numerical Simulation Research Center School of Energy and Power Engineering Beihang University Chinese Aviation Powerplant Research Institute

For the numerical simulation of flow systems with various complex components, the traditional one-dimensional （1D） network method has its comparative advantage in time consuming and the CFD method has its absolute advantage in the detailed flow capturing. The proper coupling of the advantages of different dimensional methods can strike balance well between time cost and accuracy and then significantly decrease the whole design cycle for the flow systems in modern machines. A novel multi-fidelity coupled simulation method with numerical zooming is developed for flow systems. This method focuses on the integration of one-, two-and three-dimensional codes for various components. Coupled iterative process for the different dimensional simulation cycles of sub-systems is performed until the concerned flow variables of the whole system achieve convergence. Numerical zooming is employed to update boundary data of components with different dimen-sionalities. Based on this method, a highly automatic, multi-discipline computing environment with integrated zooming is developed. The numerical results of Y-Junction and the air system of a jet engine are presented to verify the solution method. They indicate that this type of multi-fidelity simulationmethod can greatly improve the prediction capability for the flow systems.

关键词： Complex flow system Coupling Jet engine Multi-fidelity Zooming

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“地理信息系统”课程开展课程思政教学探讨

教育教学论坛 2021年第41期 129-132页

作者：吴佳妮邹丹肖汶斌雷鹏正国防科技大学气象海洋学院湖南长沙410073

“地理信息系统”是一门实践性较强的专业课程,使学生在掌握地理信息系统相关概念、原理与方法的基础上,能应用GIS软件解决地学分析实际问题。在认清“地理信息系统”课程开展“课程思政”建设必要性的基础上,针对课程特点,从强化教师... 详细信息

“地理信息系统”是一门实践性较强的专业课程,使学生在掌握地理信息系统相关概念、原理与方法的基础上,能应用GIS软件解决地学分析实际问题。在认清“地理信息系统”课程开展“课程思政”建设必要性的基础上,针对课程特点,从强化教师课程思政意识、挖掘课程的思政元素以及调整多元化教学方法三个方面,探讨了“地理信息系统”课程开展思政教学的方式方法,以期在传授专业知识的同时,逐步培养学生的家国情怀、个人品格以及科学素养,实现高校教育教学全过程和全方位育人。

关键词：地理信息系统课程思政意识思政元素教学方法

A Hybrid Features Based Detection Method for Inshore Ship Targets in SAR Imagery

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Journal of Geodesy and Geoinformation Science 2023年第1期6卷 95-107页

作者： Tong zheng peng lei Jun WANG School of Artificial Intelligence Beijing Technology and Business UniversityBeijing 100031China School of Electronic and Information Engineering Beihang UniversityBeijing 100083China

Convolutional Neural Networks(CNNs)have recently attracted much attention in the ship detection from Synthetic Aperture Radar(SAR)***,compared with optical images,SAR ones are hard to ***,due to the high similarity between the man-made targets near shore and inshore ships,the classical methods are unable to achieve effective detection of inshore *** mitigate the influence of onshore ship-like objects,this paper proposes an inshore ship detection method in SAR images by using hybrid ***,the sea-land segmentation is applied in the pre-processing to exclude obvious land regions from SAR ***,a CNN model is designed to extract deep features for identifying potential ship targets in both inshore and offshore *** this basis,the high-energy point number of amplitude spectrum is further introduced as an important and delicate feature to suppress false alarms ***,to verify the effectiveness of the proposed method,numerical and comparative studies are carried out in experiments on Sentinel-1 SAR images.

关键词： Convolutional Neural Network(CNN) Synthetic Aperture Radar(SAR) inshore ship detection hybrid features high-energy point number amplitude spectrum

Pyroptosis,ferroptosis,and autophagy in spinal cord injury:regulatory mechanisms and therapeutic targets

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Neural Regeneration Research 2025年第10期20卷 2787-2806页

作者： Qingcong zheng Du Wang Rongjie Lin Weihong Xu Department of Spinal Surgery the First Affiliated Hospital of Fujian Medical UniversityFuzhouFujian ProvinceChina Arthritis Clinical and Research Center Peking University People’s HospitalBeijingChina Department of Orthopedic Surgery Fujian Medical University Union HospitalFuzhouFujian ProvinceChina

Regulated cell death is a form of cell death that is actively controlled by *** studies have shown that regulated cell death plays a key role after spinal cord *** and ferroptosis are newly discovered types of regulated cell deaths that have been shown to exacerbate inflammation and lead to cell death in damaged spinal ***,a complex form of cell death that is interconnected with various regulated cell death mechanisms,has garnered significant attention in the study of spinal cord *** injury triggers not only cell death but also cellular survival *** signaling pathways play pivotal roles in influencing the processes of both deterioration and repair in spinal cord injury by regulating pyroptosis,ferroptosis,and ***,this review aims to comprehensively examine the mechanisms underlying regulated cell deaths,the signaling pathways that modulate these mechanisms,and the potential therapeutic targets for spinal cord *** analysis suggests that targeting the common regulatory signaling pathways of different regulated cell deaths could be a promising strategy to promote cell survival and enhance the repair of spinal cord ***,a holistic approach that incorporates multiple regulated cell deaths and their regulatory pathways presents a promising multi-target therapeutic strategy for the management of spinal cord injury.

关键词： autophagy cell death ferroptosis inflammation pathological mechanisms pyroptosis regulated cell death regulatory pathways spinal cord injury therapeutic targets

Visible-light-driven photocatalytic inactivation of bacteriophage f2 by Cu-TiO_2 nanofibers in the presence of humic acid

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Journal of Environmental Sciences 2019年第3期31卷 383-391页

作者： Rong Cheng Mi Kang Zhi-peng Shen lei Shi Xiang zheng School of Environment & Natural Resources Renmin University of China

Pathogenic viruses in drinking water are great threats to public health. Visible-lightdriven photocatalysis is a promising technology for virus inactivation. However, the existing photocatalytic antiviral research studies have mostly been carried out in single-component systems, neglecting the effect of natural organic matter, which exists widely in actual water bodies. In this paper, electrospun Cu-TiO2 nanofibers were prepared as photocatalysts, and their photocatalytic antiviral performance in the presence of humic acid(HA) was comprehensively studied for the first time. The properties of the reaction mixture were measured during the reaction. In addition, the safety, reliability and stability of photocatalytic disinfection in the mixed system were evaluated. The results showed that the virus removal efficiency decreased with the increase of the HA concentration. The type of reaction solution, such as PBS buffer solution or water, did not affect the removal efficiency noticeably. Under acidic conditions, the electrostatic forces between photocatalysts and viruses were strengthened, leading to higher virus removal efficiency. As the reaction time went on, the pH value in the solution increased first and then tended to be stable, the conductivity remained stable, and the dissolved oxygen increased first and then decreased. The safety test showed that the concentration of Cu ions released into the solution was lower than specified by the international standards. No photoreactivation was observed, and the addition of HA significantly reduced the reutilization efficiency of the photocatalysts.

关键词： Photocatalysis Visible light Bacteriophage f2 Humic acid

Soil type and wetting intensity control the enhancement extent of N_(2)O efflux in soil with drought and rewetting cycles

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International Soil and Water Conservation Research 2024年第1期12卷 137-144页

作者： Panpan Jiao lei Yang Zhongwu Li peng zheng Xiaodong Nie School of Geographical Sciences Hunan Normal UniversityChangsha 410081China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau The Research Center of Soil and Water Conservation and Ecological EnvironmentChinese Academy of Sciences and Ministry of EducationYangling 712100China Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

Climate change alters the intensity and frequency of drought and rewetting(D/W)events;however,the influence patterns of D/W on soil N_(2)O efflux in the water-limited area were not fully ***,the impacts of D/W cycles varying in different extent of rewetting and frequency to N_(2)O efflux in two kinds of soil on the Loess Plateau were *** incubation conditions consisted of 1)D/W treatments with four 7-day cycles from 10%water holding capacity(WHC)to 60%WHC or 90%WHC,2)constant moisture of 60%WHC and 90%*** pulse of N_(2)O efflux rate under 10-60%WHC treatment was higher than that under 10-90%WHC treatment in calcic cambisols,while opposite trend was observed in earth-cumuli-orthic ***,the pulse of N_(2)O efflux rate decreased as cycle number increased for different wetting intensities and soil *** direct N_(2)O efflux under 10-60%WHC and 10-90%WHC treatments were 5.49 and 1.89μg N_(2)O-N g^(-1)soil in calcic cambisols,with those being 1.92 and 10.85μg N_(2)O-N g^(-1)soil in earth-cumuli-orthic anthrosols,*** N loss in earth-cumuli-orthic anthrosols was approximately 5.74 times greater than that in calcic cambisols under 10-90%WHC treatment,whereas the N loss under 10-60%WHC treatment was about 2.86 times greater in calcic cambisols than that in earth-cumuli-orthic *** study suggested that extreme rainfall events can enhance the N_(2)O efflux and N loss in agricultural soils on the Loess Plateau in terms of soil type and wetting intensity,which should not be ignored in the N fertilizer management.

关键词： Drought/rewetting cycles N_(2)O efflux Wetting intensity Microbial biomass N Dissolved organic N Loess plateau

Drying-rewetting cycles reduce bacterial diversity and carbon loss in soil on the Loess Plateau of China

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Pedosphere 2023年第6期33卷 838-848页

作者： Panpan JIAO Haibing XIAO Zhongwu LI lei YANG peng zheng State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Research Center of Soil and Water Conservation and Ecological EnvironmentChinese Academy of Sciences and Ministry of EducationYangling 712100China Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China State Environmental Protection Key Laboratory of Soil Health and Green Remediation Huazhong Agricultural UniversityWuhan 430070China College of Resources and Environmental Sciences Hunan Normal UniversityChangsha 410081China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

With global climate change, soil drying-rewetting(DRW) events have intensified and occurred frequently on the Loess Plateau of China. However, the extent to which the DRW cycles with different wetting intensities and cycle numbers alter microbial community and respiration is barely understood. Here,indoor DRW one and four cycles treatments were implemented on soil samples obtained from the Loess Plateau, involving increase of soil moisture from10% water-holding capacity(WHC) to 60% and 90% WHC(i.e., 10%–60% and 10%–90% WHC, respectively). Constant soil moistures of 10%, 60%,and 90% WHC were used as the controls. The results showed that bacterial diversity and richness decreased and those of fungi remained unchanged under DRW treatments compared to the controls. Under all moisture levels, Actinobacteriota and Ascomycota were the most dominant bacterial and fungal phyla,respectively. The bacterial network was more complex than that of fungi, indicating that bacteria had a greater potential for interaction and niche sharing under DRW treatments. The pulse of respiration rate declined as the DRW cycle increased under 10%–60% WHC, but remained similar for different cycles under 10%–90% WHC. Moreover, the DRW treatments reduced the overall carbon loss, and the direct carbon release under 10%–60% WHC was larger than that under 10%–90% WHC. The cumulative CO_(2) emissions after four DRW cycles were significantly positively correlated with microbial biomass carbon and negatively correlated with fungal richness(Chao 1).

关键词： bacterial network cumulative CO_(2)emissions fungal richness microbial biomass carbon microbial community respiration rate soil moisture

Lymph node regression grading of locally advanced rectal cancer treated with neoadjuvant chemoradiotherapy

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World Journal of Gastrointestinal Oncology 2022年第8期14卷 1429-1445页

作者： lei He Juan Xiao Ping zheng lei Zhong Qian peng School of Medicine University of Electronic Science and Technology of ChinaChengdu 611731Sichuan ProvinceChina Department of Pathology Sichuan Cancer Hospital&InstituteSichuan Cancer CenterSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 610041Sichuan ProvinceChina Personalized Drug Therapy Key Laboratory of Sichuan Province Sichuan Academy of Medical Sciences and Sichuan Provincial People’s HospitalChengdu 610072Sichuan ProvinceChina Radiation Therapy Center Sichuan Cancer Hospital&InstituteSichuan Cancer CenterSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 610041Sichuan ProvinceChina

Neoadjuvant chemoradiotherapy(nCRT)and total rectal mesenteric excision are the main standards of treatment for locally advanced rectal cancer(LARC).Lymph node regression grade(LRG)is an indicator of prognosis and response to preoperative nCRT based on postsurgical metastatic lymph node *** histopathological findings in metastatic lymph nodes after nCRT include necrosis,hemorrhage,nodular fibrosis,foamy histiocytes,cystic cell reactions,areas of hyalinosis,residual cancer cells,and pools of mucin.A number of LRG systems designed to classify the amount of lymph node regression after nCRT is mainly concerned with the relationship between residual cancer cells and regressive fibrosis and with estimating the number of lymph nodes existing with residual cancer *** offers significant prognostic information,and in most cases,LRG after nCRT correlates with patient *** this review,we describe the systematic classification of LRG after nCRT,patient prognosis,the correlation with tumor regression grade,and the typical histopathological findings of lymph *** work may serve as a reference to help predict the clinical complete response and determine lymph node regression in patients based on preservation strategies,allowing for the formulation of more accurate treatment strategies for LARC patients,which has important clinical significance and scientific value.

关键词： Lymph node regression grade Histopathological Rectal cancer Chemoradiotherapy Treatment response Neoadjuvant therapy