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Drop strength measurement of green pellet based on drop-rebound mechanism

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Journal of Iron and Steel Research International 2023年第11期30卷 2143-2152页

作者： Jie Lei Xu gao Jing-shu An Guang-da Bao Yu-qi Kong Hong-ming Long School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resource Comprehensive Utilization Anhui University of TechnologyMa’anshan243032AnhuiChina

The construction of blast furnace charge structure based on pellet and the development of short process from non-blast furnace to electric furnace will be an efficient way to accomplish"carbon peak,carbon neutral".Since drop strength is one of the most crucial quality indexes for green pellet,the crack detection in the collision process is an indispensable segment;however,the present crack determination is basically completed *** to a series of problems including high labor intensity and poor detection conditions,it is urgent to develop an accurate,convenient and fast standardized method for drop strength *** view of the above issues,combined with plenty of experimental studies,it is found that whether rebound occurs after the collision of green ball can be used as the basis for judging if there are cracks on the surface,and the mechanism of this segment is explained by the energy conversion of collision process that the plastic deformation of the collision is a cumulative *** collision will cause a slight displacement of the iron ore particles;until the cumulative displacement exceeds the binding force between the particles,they will slip in a large range,that is,cracks will *** drop strength can be detected based on the drop-rebound mechanism determining crack generation during collision process by high-speed cameras,and the method is fully applicable to oxidized pellets with particle size of 8-16 mm though various pellet plasticities and masses increase the difficulty of bounce height *** on the drop-rebound mechanism of green pellet,three methods for automatically detecting the drop strength are proposed,which are high-speed camera,photoelectric sensor and pressure sensor methods.

关键词： Green pellet Drop strength Collision Rebound Crack

青海省玛多县夺儿贡玛地区地球化学特征与找矿方向

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西北地质 2025年第1期58卷 178-185页

作者：马庆王元伟高永宝刘明中国地质调查局金矿勘查技术创新中心陕西西安710000 中国地质调查局西安矿产资源调查中心陕西西安710000

为查明受断层破碎带控制的夺儿贡玛矿区下一步找矿方向,在矿区采用土壤地球化学测量、1∶1万综合剖面测量与槽探等验证方法,并对元素分布、元素相关性、元素异常等特征进行研究。研究发现:①Sb、Au为本区成矿潜力大的优势成矿元素,As、C... 详细信息

为查明受断层破碎带控制的夺儿贡玛矿区下一步找矿方向,在矿区采用土壤地球化学测量、1∶1万综合剖面测量与槽探等验证方法,并对元素分布、元素相关性、元素异常等特征进行研究。研究发现:①Sb、Au为本区成矿潜力大的优势成矿元素,As、Cu、Pb、Zn、Ag为与Sb、Au矿化关系密切的重要找矿指示元素。②新发现4处蚀变岩型破碎蚀变脉,圈定了3条锑工业矿体。③初步查明本区主要为破碎蚀变岩型锑金矿床,受断层破碎带控制。结合矿区所处成矿条件和异常发育情况,建议在外围开展1∶1万土壤测量,扩大找矿成果。

关键词：玛多县夺尔贡玛地球化学金锑矿床找矿方向

集中连片保护利用目标下徽州传统村落数字化感知技术研究

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自然资源学报 2025年第2期40卷 402-422页

作者：李早成庚汪强高鸣飞方群莉安徽建筑大学建筑与规划学院安徽省地域环境健康与空间智慧感知工程研究中心城市更新与交通安徽省联合共建学科重点实验室合肥工业大学土木与水利工程学院合肥工业大学建筑与艺术学院黄山学院建筑工程学院

传统村落空间的高品质建设成为集中连片保护利用的破题方向，对空间认知和活化提出了更高要求。研究展开区域和村落两个层级的组合分析：在区域层面，基于GIS地理信息系统的空间分析方法，对徽州传统村落的地理分布、分布密度、空间分... 详细信息

传统村落空间的高品质建设成为集中连片保护利用的破题方向，对空间认知和活化提出了更高要求。研究展开区域和村落两个层级的组合分析：在区域层面，基于GIS地理信息系统的空间分析方法，对徽州传统村落的地理分布、分布密度、空间分异等特征展开解析；在村落层面，基于三维扫描和虚拟现实技术，对村落空间在数据获取和利用中的数据通道、技术适用性展开实证论证。研究表明：徽州传统村落呈现逐批次高度集聚的分布趋势，对村落间同质化竞争和发展提出严峻挑战，进而对此构建协同交互技术解析村落间的共同、分异特征，实现空间的优化设计应对。所形成的技术体系与方法论可以优化区域资源配置、活态激发空间品质，对地域性传统村落发展具有积极意义。

关键词：徽州传统村落集中连片空间分布特征三维扫描技术虚拟现实技术

Ecophysiological Response of Plants to Combined Pollution from Heavy-duty Vehicles and Industrial Emissions in Higher Humidity

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Journal of Integrative Plant Biology 2006年第12期48卷 1391-1400页

作者： Hong-Xia Cui gao-ming Jiang shu-Li Niu Chuang-Dao Jiang Mei-Zhen Liu shun-Li Yu Lei-ming gao Key Laboratory of Quantitative Vegetation Ecology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Beijing Botanical Garden Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Graduate School the Chinese Academy of Sciences Beijing 100039 China

Pollution can be aggravated in industrial areas if traffic exhausts are mixed with industrial emissions under high humidity conditions. Plants growing in such environments may suffer from severe stress. The impact of vehicle emissions on urban vegetation in an industrial area in Qingdao, China, was investigated by studying seven plant species at visible, physiological and chemical levels. The traits of plant species in certain environmental conditions were compared between a clear area, Badaguan （BDG）, and polluted area, Roadside （RS）. We found that foliar sulfur uptake for all species was not significantly high at RS compared with BDG, although the sulfur content of atmosphere and surface soils at RS were much higher than those at BDG. For Ailanthus altissima Swingle, the content of foliar pigment and net photosynthesis rate （PN） decreased by 20%. Meanwhile, leaves became incrassate and no visible leaf damage was noted, suggesting this species could adapt well to pollution. A 50% decrease in PN occurred in Hibiscus syriacus L., but there was no statistical change in content of chlorophyll a and b and water uptake. Also, thickened leaves may prevent the pollutant from permeation. Foliar water content was still at a low level, although a water compensation mechanism was established for Fraxinus chinensis Rosb. reflected by low water potential and high water use efficiency. More adversely, a 65% decrease in PN happened inevitably with the significant decomposition of photosynthetic pigments, which exhibited visible damage. We also noted in one evergreen species （Magnolia grandifiora L.） that water absorption driven by low water potential should be helpful to supply water loss induced by strong stomatal transpiration and maintain normal growth. Furthermore, photosynthetic pigment content did not decline statistically, but supported a stable net assimilation. Two herbaceous species, Poa annua L. and Ophiopogon japonicus Ker-Gawh, were very tolerant to adverse stress com

关键词： heavy-duty vehicle photosynthesis pigments urban vegetation water potential

Synthesis and Crystal Structure of 4,4'-(4-(1-Naphthyl)-4-phenyl-1,3-butadienylidene)-bis[N,N-diethylbenzenamine]

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1063-1066页

作者： LI Xiang-gao WUAn-shu XU De-shun WANG Shi-Rong ZHAO Xue-ming Fine Chemicals Department School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

The title compound （C40H42N2） has been synthesized by the reaction of l-（l- naphthyl）-l-phenyl-3-chloropropylene and bis（4-（diethylamino） phenyl）methanone, and characterized by IR, ^1H NMR, MS and X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P21/c with a = 17.047（3）, b = 10.807（2）, c = 18.494（4） A, β = 105.727（4）°, V= 3279.4（11） A^3, Mr = 550.76, Z = 4, Dc = 1.115 g/cm^3,μ（MoKa） = 0.085 mm^-1, F（000） = 1184, the final R = 0.0625 and wR = 0.1384 for 2276 observed reflections （1 〉 2σ（I））. X-ray analysis reveals that the butadiene fragment adopts a planar cisiod conformation and makes a dihedral angel of 69.4（2）° with the naphthalene ring.

关键词： 4,4′-(4-(1-naphthyl)-4-phenyl-1,3-hutadienylidene)bis[N,N-diethyl-benzenamine] synthesis crystal structure

Advances in Phytochemistry and Modern Pharmacology of Saposhnikovia Divaricata(Turcz.)Schischk

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Chinese Journal of Integrative Medicine 2023年第11期29卷 1033-1044页

作者： gao Jun-wen ZHAN Yang WANG Yun-he ZHAO shu-jie HAN Zhong-ming College of Resources and Environment Jilin Agricultural UniversityChangchun(130118)China Information Center Jilin Agricultural UniversityChangchun(130118)China College of Chinese Medicinal Materials Jilin Agricultural UniversityChangchun(130118)China

Saposhnikovia divaricata(Turcz.)Schischk(***,Fangfeng)is a herb in the Apiaceae family,and its root has been used since the Western Han Dynasty(202 B.C.).Chromones and coumarins are the pharmacologically active substances in *** phytochemical and pharmacological studies have demonstrated their antipyretic,analgesic,anti-inflammatory,antioxidant,anti-tumor,and anticoagulant *** and analytical strategy theory advancements have yielded novel results;however,most investigations have been limited to the main active substances—chromones and ***,we reviewed studies related to the chemical composition and pharmacological activity of ***,analyzed the developing trends and challenges,and proposed that research should focus on components’synergistic *** also suggested that,the structure-effect relationship should be prioritized in advanced research.

关键词： coumarin synergistic priori

“两个文明”相协调的中国式现代化:理论内涵、历史渊源、实践要求

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哈尔滨师范大学社会科学学报 2025年第1期16卷 40-44页

作者：高小明中共合肥市委党校党史党建教研部安徽合肥230031

中国式现代化是物质文明和精神文明相协调的现代化,这一重要论述既有丰富的理论内涵,又有深厚的历史渊源。在前进道路上,要把握好物质文明和精神文明相协调的中国式现代化的实践要求,即正确理解新时代内涵,从观念上把握住语义深处对二... 详细信息

中国式现代化是物质文明和精神文明相协调的现代化,这一重要论述既有丰富的理论内涵,又有深厚的历史渊源。在前进道路上,要把握好物质文明和精神文明相协调的中国式现代化的实践要求,即正确理解新时代内涵,从观念上把握住语义深处对二者协调发展关系的认识;不懈探索新时代机制,从制度上促使“两个文明”在“五大文明”建设中发挥应有的作用;努力开创新时代局面,从行动上提升建设和发展过程中的软硬实力,并且相互赋能,从而进一步推进强国建设、民族复兴。

关键词：中国式现代化物质文明精神文明协调发展

Invasive Spartina alterniflora-induced factors affecting epibenthos distribution in coastal salt marsh, China

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Acta Oceanologica Sinica 2013年第2期32卷 81-88页

作者： XIE Wenjing gao shu School of Geographic and Oceanographic Sciences Nanjing University Key Laboratory of Coast and Island Development of Ministry of Education Nanjing University

Artificially introduced cordgrass, Spartina alterniflora, rapidly colonized the intertidal flats of the Jiangsu coast, eastern China. The epibenthos on an intertidal flat invaded by S. alterniflorawere studied, to identify how local epibenthos species react to an altered environment. Epibenthic samples and surficial sediment samples were collected along a shore-normal profile in 50 quadrats at ten stations across the Spartina salt marsh; and five control quadrats for a station located on the barren sandy-mud flat. The grain size param- eters of the surficial sediments show that S. alterniflora altered the grain size gradient along the profile of the intertidal zone by trapping fine-grained sediments. Spartina alterniflora could inhabit lower elevation- s than indigenous salt marsh vegetation, thus creating larger areas of finer surficial sediments, which was suitable for not only native epibenthic species but also species which do not exist on the barren sandy-mud flat. Correlation analyses show that the epibenthos were sensitive to sediment grain size and type, on the invaded S. alterniflora salt marsh. Further, there was an interspecific relationship affecting the distribution of epibenthos. The results show that epibenthos preferred ecological niches, within the Spartina salt marsh, even in the same sampling station.

关键词： benthos ecology exotic plant species grain size tidal-flat sedimentation Jiangsu coast

ADCP measurements of suspended sediment flux at the entrance to Jiaozhou Bay, western Yellow Sea

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Acta Oceanologica Sinica 2013年第12期32卷 96-103页

作者： WANG Yaping gao shu Ministry of Education Laboratory for Coast and Island Development Nanjing University

The purpose of the present contribution is to explore the technique to use Acoustic Doppler Current Pro- filers （ADCPs） for suspended sediment flux measurements, which may be applied to coastal embayment environments such as estuaries and tidal inlets for sediment exchange and budget studies. Based on tidal cycle measurements from the entrance of ]iaozhou Bay, Shandong Peninsula, eastern China, statistical rela- tionships between the suspended sediment concentration （SSC） and ADCP echo intensity output are estab- lished. Echo intensity data obtained during an ADCP survey along two cross-sections during a spring tidal phase were transformed into SSC data. The ADCP current velocity and SSC data were then used to calculate the flux of fine-grained sediment. The results show that net sediment transport at the entrance is directed towards the open sea, with an order of magnitude of 103 t per spring tidal cycle; hence, although Jiaozhou Bay is a low SSC environment, the tidally induced suspended sediment transport can be intense.

关键词： ADCP suspended sediment concentration grain size acoustic parameters Jiaozhou Bay