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Effect of CaCl_2 on RDI and RI of Sinter

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Journal of Iron and Steel Research International 2010年第11期17卷 7-12页

作者： ZHANG Xu ZHANG Jian-liang HU Zheng-wen ZUO Hai-bin guo Hong-wei School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

On the premise of maintaining the reducibility of sinter unchanged, it is of great significance to reduce the RDI （reduction degradation index） of sinter, which will improve the permeability of blast furnace burden column, so as to realize stable and smooth performance, and keep high yield and low consumption. Under laboratory conditions, a study on the RDI and RI （reduction index） of sinter was proposed, in which the sinter was immersed in solutions with different types and concentrations. In order to study the mechanism of CaCl2 effect on the RDI and RI of sinter, analysis based on the methods of IR spectra, SEM and chaleography was adopted. The results show that Cl^- is the main factor reducing the RDI of sinter, and the RDI and RI of sinter decrease with the increase of Cl^- concentration. With comprehensive consideration of the RDI and RI of sinter, when the concentration of Cl^ is 2%, the RDI of sinter will be significantly reduced and RI will not be affected.

关键词： sinter CaCl2 RDI RI

High-resolution spatio-temporal analysis of snowmelt over Antarctic Peninsula ice shelves from 2015 to 2021 using SAR images

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International Journal of Digital Earth 2023年第1期16卷 825-846页

作者： Qi Zhu Huadong guo Lu Zhang Dong liang Xuting Liu Heng Zhou Yiting Gou Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China International Research Center of Big Data for Sustainable Development Goals BeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China

Ice shelves play an essential role in the dynamics of the Antarctic ice *** surface meltwater is important,as it can irreversibly weaken ice shelves by exerting additional hydrostatic ***,high-resolution snowmelt products are urgently needed to accurately analyze melting patterns of ice shelves and further estimate mass *** this study,a new high-resolution(40 m)snowmelt dataset over all of the Antarctic Peninsula ice shelves larger than 100 km^(2) was developed based on the modified snowmelt detection framework by using a co-orbit normalization *** dataset provides detailed snowmelt information on each ice shelf,including the image coverage,melting area and melting ratio every 5 *** melting patterns of three typical ice shelves(George VI,Wilkins and Larsen C Ice Shelves)and the spatio-temporal melting distribution of the Antarctic Peninsula(AP)were further *** snowmelt information indicates that both the extent and duration of snowmelt have been increasing in the Antarctic Peninsula from 2015 to 2021,and we found that the snowmelt on the Antarctic Peninsula showed a spatial pattern of significantly intense snowmelt on the western *** believe this study will provide essential data for ice shelf investigation to support otherfields of polar research.

关键词： Surface snowmelt ice shelf sentinel-1 imagery Antarctic Peninsula high resolution

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建筑陶瓷运行阶段碳排放分析

建筑技术 2024年第16期55卷 2045-2047页

作者：唐艳南崔治国张亮钟安琪中国建筑科学研究院有限公司北京100013 建科环能科技有限公司北京100013

对10家建筑陶瓷工厂的运行阶段碳排放进行研究,探索降低碳排放的有效途径和方法。通过对建筑陶瓷工厂不同运行阶段横向以及纵向的碳排放数据分析,化石燃料燃烧产生的二氧化碳排放比例约占80.4%,工业生产过程产生的二氧化碳排放比例约占4... 详细信息

对10家建筑陶瓷工厂的运行阶段碳排放进行研究,探索降低碳排放的有效途径和方法。通过对建筑陶瓷工厂不同运行阶段横向以及纵向的碳排放数据分析,化石燃料燃烧产生的二氧化碳排放比例约占80.4%,工业生产过程产生的二氧化碳排放比例约占4.7%,陶瓷工厂净购入的电力产生的二氧化碳排放比例约占18.0%。可以得出,采用清洁能源、合理原料配比、提高建筑陶瓷产品的质量和耐久性、环保、高效率低能耗的生产工艺和设备策略,可实现低碳生产化目标。为建筑陶瓷行业绿色、低碳、可持续发展提供理论和实践上的支持,也为其他行业的节能减排提供参考。

关键词：建筑陶瓷碳排放节能减排

Penetration performance of W/Cu double-layer shaped charge liners

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Rare Metals 2016年第2期35卷 184-191页

作者： Wen-Jian Dong Jin-Xu Liu Xing-Wang Cheng Shu-Kui Li qing-He Zou Wen-Qi guo School of Materials Science and Engineering Beijing Institute of Technology Mudanjiang North Alloy Tool Co. Ltd.

Two kinds of W/Cu double-layer shaped charge liner（SCL） were prepared by chemical vapor deposition（CVD） combined with electroforming technique： A SCL with W inner layer and Cu outer layer, B SCL with Cu inner layer and W outer layer. The penetration properties of A and B SCLs were researched. The results show that the two SCLs can form continuous jet and the tip velocities of A and B jets are 7.4 and 6.3 km s^（-1）, respectively. The kinetic energy density（5.3 9 1011 J m-3） of A jet tip increases by 194.4 %compared with that（1.8 9 1011 J m-3） of B jet tip. B jet,however, exhibits deeper penetration depth at the same experimental conditions. The chemical component and microstructure of the area nearby the ballistic perforation were researched. Component analysis shows that both the jets are formed only from inner layer metal. Microstructure analysis shows that martensite and intermetallic form around ballistic perforation penetrated by A SCL due to the intensive interaction between W jet and steel target. The two kinds of newly formed ultrahard phases also hinder the jet from penetrating target further. As a result of relatively alleviative interaction between Cu jet and target, only solid solution rather than ultrahard phases forms around ballistic perforation penetrated by B SCL.

关键词： Shaped charge liner Jet Penetration performance Chemical vapor deposition Electroforming technique

基于OBE面向科教融合的药物分析学教学改革研究

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广东化工 2024年第6期51卷 177-178,152页

作者：陈亮郭江涛李倩徐锋陈滕贵州中医药大学贵州贵阳550025

科教融合与化工科技类课程药物分析学具有高度契合性。本文从夯实教师队伍、科学前沿与课程内容的整合、以赛促学,以赛促教、实验的开展、立体化评价等几个方面详细地阐述了药物分析学课程科教融合协同育人的路径,最后分析了大学生创新... 详细信息

科教融合与化工科技类课程药物分析学具有高度契合性。本文从夯实教师队伍、科学前沿与课程内容的整合、以赛促学,以赛促教、实验的开展、立体化评价等几个方面详细地阐述了药物分析学课程科教融合协同育人的路径,最后分析了大学生创新创业项目与药物分析学教学的协同作用。旨在为基于OBE理念下发展药物分析学课程科教融合协同育人提供新的思路。

关键词：科教融合药物分析学教学改革路径

A Study of a Molecular Mechanics Field Used in Simulating Enantiorecognition

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Chinese Chemical Letters 1999年第5期10卷 415-418页

作者： He qing SHEN qing Hat WANG Dao Qian ZHU liang Mo ZHOU(Dalian Institute of Chemical Physic. Chinese Academy of Sciences. Dalian 116012) Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116012 China

A molecular mechanics field, Alchemy II, was utilized to model the chiral recognition between S-N-acetyl-alpha-methyl-alpha-naphthylamine and (R, S)-N-(3, 5-dinitrophrnyl)-alpha-methyl-benzeneacetamide and between beta-cyclodextrin and (R, S)-fenoprofen. Some preliminary results have: been obtained to sustain the three-point action models and the induce-fit action in enantiorecognition.

关键词： molecular mechanics simulating enantiorecognition

Fatigue crack propagation behavior of Ni-based superalloys after overloading at elevated temperatures

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Progress in Natural Science:Materials International 2016年第2期26卷 197-203页

作者： Xinyue Huang liang Wang Yunming Hu Guangping guo David Salmon Ying Li Wenxia Zhao National Key Laboratory of Science and Technology on Advanced High Temperature Structural Materials Beijing Institute of Aeronautical Materials MTS Systems Corporation Eden Prairie 3. Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation Beijing Institute of Aeronautical Materials

The fatigue crack propagation behavior of three superalloys subjected to a single overloading at elevated temperatures was investigated. The fatigue crack propagation rate FCPR versus stress intensity factor range data da/dN—ΔK were calculated using the two-point secant method. It was found that the crack growth rates of the investigated materials were retarded after overloading with an overload ratio R OL=1.6. The size of the plastic zone in the front of the crack tip and its relation to loading level were discussed. The overload retardation effects are attributed to crack closure. The fatigue damage in the plastic zone can also be a factor to explain the overload retardation.

关键词： High temperature fatigue Fatigue crack propagation rate Overloading Crack closure Superalloys

Heavy metal accumulation and phytostabilization potential of dominant plant species growing on manganese mine tailings

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 394-404页

作者： Shengxiang YANG Shichu liang Langbo YI Bibo XU Jianbing CAO Yifeng guo Yu ZHOU College of Bio-resources and Environmental Science and Key Laboratory of Plant Resources Conservation and Utilization Jishou University Jishou 416000 China Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University) Ministry of Education of China Guilin 541000 China College of Environmental Science & Engineering Hunan University Changsha 410082 China Huayuan Environmental Protection Bureau Huayuan 416000 China

Screening plants that are hypertolerant to and excluders of certain heavy metals plays a fundamental role in a remediation strategy for metalliferous mine tailings. A field survey of terrestrial higher plants growing on Mn mine tailings at Huayuan, Hunan Province, China was conducted to identify candidate species for application in phytostabilization of the tailings in this region. In total, 51 species belonging to 21 families were recorded and the 12 dominant plants were investigated for their potential in phytostabilization of heavy metals. Eight plant species, Alternanthera philoxeroides, Artemisia princeps, Bidens frondosa, Bidens pilosa, Cynodon dactylon, Digitaria sanguinalis, Erigeron canadensis, and Setaria plicata accumulated much lower concentrations of heavy metals in shoots and roots than the associated soils and bioconcen- tration factors （BFs） for Cd, Mn, Pb and Zn were all 〈 1, demonstrating a high tolerance to heavy metals and poor metals translocation ability. The field investigation also found that these species grew fast, accumulated biomass rapidly and developed a vegetation cover in a relatively short time. Therefore, they are good candidates for phytostabilization purposes and could be used as pioneer species in phytoremediation of Mn mine tailings in this region of South China.

关键词： Mn mine tailings heavy metal accumulation phytostabilization

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基于协同优化的电力物资智能仓储系统

制造业自动化 2024年第7期46卷 110-114页

作者：王曼胡欢曹祖亮郭胜辉国网电力科学研究院武汉南瑞有限责任公司湖北武汉430074 苏州科技大学电子与信息工程学院江苏苏州215009

电力设施直接服务于国计民生,其稳定运行至关重要,对电力物资储配提出了更高要求,为此,在对堆垛机和自动导引小车运行路径进行协同优化的基础上,设计了一种基于协同优化的电力物资智能仓储系统。仿真结果证明了设计系统的有效性和任务... 详细信息

电力设施直接服务于国计民生,其稳定运行至关重要,对电力物资储配提出了更高要求,为此,在对堆垛机和自动导引小车运行路径进行协同优化的基础上,设计了一种基于协同优化的电力物资智能仓储系统。仿真结果证明了设计系统的有效性和任务完成时间上的优势。

关键词：堆垛机自动导引小车路径规划协同