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THE SCHUR TEST OF COMPACT OPERATORS

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Acta Mathematica Scientia 2024年第5期44卷 2041-2050页

作者： Qijian KANG maofa WANG School of Mathematics and Statistics Lingnan Normal UniversityZhanjiang524048China School of Mathematics and Statistics Wuhan UniversityWuhan430072China

Infinite matrix theory is an important branch of function *** linear operator on a complex separable infinite dimensional Hilbert space corresponds to an infinite matrix with respect a orthonormal base of the space,but not every infinite matrix corresponds to an *** classical Schur test provides an elegant and useful criterion for the boundedness of linear operators,which is considered a respectable mathematical *** this paper,we prove the compact version of the Schur ***,we provide the Schur test for the Schatten class S_(2).It is worth noting that our main results can be applicable to the general matrix without limitation on non-negative *** finally provide the Schur test for compact operators from l_(p) into l_(q).

关键词： Schur test compact operator infinite matrix

Effects of iron oxide on crystallization behavior and spatial distribution of spinel in stainless steel slag

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 292-300页

作者： Zihang Yan Qing Zhao Chengzhi Han Xiaohui Mei Chengjun Liu maofa Jiang Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

Chromium plays a vital role in stainless steel due to its ability to improve the corrosion resistance of the ***,the re-lease of chromium from stainless steel slag(SSS)during SSS stockpiling causes detrimental environmental *** prevent chromium pollution,the effects of iron oxide on crystallization behavior and spatial distribution of spinel were investigated in this *** results revealed that FeO was more conducive to the growth of spinels compared with Fe2O3 and *** were found to be mainly distrib-uted at the top and bottom of *** amount of spinel phase at the bottom decreased with the increasing FeO content,while that at the top *** average particle size of spinel in the slag with 1.wt%FeO content was 1..8μ***,no notable structural changes were observed with a further increase in FeO *** other words,the spatial distribution of spinel changed when the content of iron oxide varied in the range of 8wt%to 1.wt%.Finally,less spinel was found at the bottom of slag with a FeO content of 23wt%.

关键词： stainless steel slag spinel chromium waste remediation ferrous oxide

A mite parasitoid,Pyemotes zhonghuajia,negatively impacts the fitness traits and immune response of the fall armyworm,Spodoptera frugiperda

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Journal of Integrative Agriculture 2024年第1期23卷 205-216页

作者： Yanfei Song Tai’an Tian Yichai Chen Keshi Zhang maofa Yang Jianfeng Liu Institute of Entomology Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous RegionGuizhou University/Scientific Observing and Experiment Station of Crop Pests in GuiyangMinistry of Agriculture and Rural AffairsGuiyang 550025China Administration of Guizhou Fanjingshan National Nature Reserve Jiangkou 554400China Centre for Biodiversity and Biosecurity School of Biological SciencesThe University of AucklandAuckland 1072New Zealand College of Tobacco Science Guizhou UniversityGuiyang 550025China

Parasitoids are key regulators in ecological communities and widely used as agents in biocontrol *** fall armyworm,Spodoptera frugiperda,recently invaded multiple continents and caused substantial economic losses in *** zhonghuajia,a newly identified mite parasitoid,has shown potential for controlling various agricultural insect ***,this study tested the performance of *** in parasitising *** also investigated the sublethal effects of parasitism by *** on host fitness traits,transgenerational impacts,and cellular and humoral *** result showed that the fifth-instar larvae of *** parasitised by 40 *** were all dead(i.e.,a lethal effect),while parasitism by 5 or 1. *** was considered sublethal since many *** survived to adulthood and produced offspring after *** sublethal influences from parasitism by *** resulted in reduced pupal weight,adult emergence rate and fecundity,but increased developmental time and *** at both lethal(40 mites)and sublethal(1. mites)levels impaired the cellular and humoral immunity of *** study presents the first empirical evidence that mite parasitoids can negatively influence host ***,it provides insights into the biocontrol potential of mite parasitoids and their interactions with hosts.

关键词： Pyemotes zhonghuajia Spodoptera frugiperda immunity parasitically-induced influence biocontrol parasitoid

Reaction Kinetics and Secondary Organic Aerosol Composition Analysis of 2-Cyclohexen-1.one with NO_(3) Radicals

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Chemical Research in Chinese Universities 2024年第4期40卷 730-736页

作者： HU Lin TONG Shengrui XU Yanyong ZHANG Hailiang YU Shanshan CHEN Meifang GE maofa Structural Chemistry of Unstable and Stable Species Chinese Academy of Sciences Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190P.R.China College of Ecology and Environment Xinjiang UniversityUrumqi830017P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

Unsaturated ketones are typical oxygenated volatile organic compounds(OVOCs)with high reactivity,and are important precursors in air *** sources of OVOCs are complex and include direct emissions and secondary oxidation formation of VOCs in the atmosphere.2-Cyclohexen-1.one is a widespread substance,and is derived from the industrial catalytic oxidation of *** this paper,we investigated the rate constants of the chemical reactions of 2-cyclohexen-1.one with NO_(3) radicals,which is(7.25±0.29)×1.^(-1.) cm^(3)·molecule^(-1.·s^(-1. at 298 K and under 1.atm(1.atm=1.1.25Pa).It supplemented the kinetics of NO_(3) radicals database,and revealed its effects in the nighttime *** addition,the reaction products of 2-cyclohexen-1.one with NO_(3) radicals were detected by Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS),which revealed a series of nitrate esters in the composition of the secondary organic aerosol(SOA),which may reduce atmospheric ***,the possible pathways for the generation of the products were developed.

关键词： Kinetics Unsaturated ketone Nitrate radical Secondary organic aerosol

Kinetic and mechanism of the reaction between Cl and several mono-methyl branched alkanes

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Journal of Environmental Sciences 2024年第1期135卷 474-482页

作者： Yan Chen Weigang Wang Junling Li Li Zhou Bo Shi Cici Fan Ke Wang Hao Zhang Hong Li maofa Ge State Key Laboratory for Structural Chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular Sciences(BNLMS)CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China National Engineering Research Center for Flue Gas Desulfurization Department of Environmental Science and EngineeringSichuan UniversityChengdu 610065China College of Chemistry and Materials Science Hebei Normal UniversityShijiazhuang 050024China

Branched alkanes are ubiquitous in the troposphere and play an important role in the chemical *** this work,the rate constants and products for the reaction of Cl atoms with 3-methylhexane and 2-methylheptane were measured at room temperature(298±0.2K)and atmospheric pressure using a conventional relative rate *** rate constants of 3-methylhexane and 2-methylheptane in units of cm~3/(mol·sec)are(3.09±0.31.×1.^(-1.)and(3.67±0.40)×1.^(-1.),***,the corresponding atmospheric lifetime of the studied branched alkanes with Cl was 6.92-89.90 hours and 5.82-75.69 hours,*** estimated atmospheric lifetimes indicated that the reaction with Cl atoms could be the most important atmospheric degradation pathway for 3-methylhexane *** gas-phase products of the reactions were identified and quantified,and particle-phase products were also *** atmosphere oxidation mechanism of Cl atoms with 3-methylhexane and 2-methylheptane is *** SOA yields of 3-methylhexane and 2-methylheptane from the reaction of Cl atoms were determined to be7.96%±0.89%and 1..35%±1.50%***,the results reveal that the primary loss process of branched alkanes is the reaction with Cl atoms,which impacts its degradation on a regional scale.

关键词： 3-Methylhexane 2-Methylheptane Chlorine atoms Kinetics Mechanism

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稀土在洁净BNbRE重轨钢中的作用机制

中国稀土学报 2004年第5期22卷 670-675页

作者：李春龙王云盛陈建军刘承军姜茂发东北大学材料与冶金学院

通过实验测定、金相观察和理论分析,系统研究了稀土在洁净BNbRE重轨钢中的赋存状态和存量的变化规律,以及其对钢的硫化物夹杂、微观组织及性能的影响作用机制。研究发现,在钢洁净度大幅度提高的条件下,稀土在钢中的作用机制有所变化,微... 详细信息

通过实验测定、金相观察和理论分析,系统研究了稀土在洁净BNbRE重轨钢中的赋存状态和存量的变化规律,以及其对钢的硫化物夹杂、微观组织及性能的影响作用机制。研究发现,在钢洁净度大幅度提高的条件下,稀土在钢中的作用机制有所变化,微量的稀土起到实现净化钢液、变质夹杂物和微合金化作用,而且作用效果非常稳定。随着钢洁净度的提高,稀土加入量可以适当降低。在本实验条件下,洁净BNbRE重轨钢的稀土最佳加入量为～0.01.,此时洁净BNbRE重轨钢的塑性和冲击韧度得到显著改善。

关键词：稀土洁净BNbRE重轨钢作用机制赋存状态存量变化塑性冲击韧度铁轨硫化物夹杂

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多措并举标本兼治有力有效做好基督教工作

中国宗教 2024年第5期 33-34页

作者： 1.中共山东省委统战部 2.山东省民宗委中共山东省委统战部山东省民宗委

近年来,山东省结合实际,采取有力举措,扎实做好基督教工作,有效推进基督教中国化山东实践,全省基督教领域呈现出和谐稳定的良好局面。一、严格落实宗教工作责任制,着力构建齐抓共管的宗教事务管理格局山东严格落实各级各部门宗教工作责... 详细信息

近年来,山东省结合实际,采取有力举措,扎实做好基督教工作,有效推进基督教中国化山东实践,全省基督教领域呈现出和谐稳定的良好局面。一、严格落实宗教工作责任制,着力构建齐抓共管的宗教事务管理格局山东严格落实各级各部门宗教工作责任制,通过强化组织保障“小切口”,推动基层宗教事务管理“大文章”。一是压实主体责任。将宗教工作纳入各级党委重要议事日程,构建起各级党委齐抓共管的工作体制。

关键词：基督教中国化齐抓共管宗教事务管理主体责任工作责任制和谐稳定严格落实标本兼治

永恒的丰碑：“大陈岛垦荒红色档案”建设侧记

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浙江档案 2024年第5期 10-11+16页

作者： 1.台州市档案馆 2.台州市椒江区档案馆台州市档案馆台州市椒江区档案馆

在台州市椒江区档案馆的特藏馆内，挂着一幅由团中央在1.56年赠给温州青年志愿垦荒队的旗帜“建设伟大祖国的大陈岛”，这面旗帜承载着一件件珍贵的档案史料和一个个生动的历史场景，大陈岛激情燃烧的垦荒史、波澜壮阔的发展史，宛如画...

在台州市椒江区档案馆的特藏馆内，挂着一幅由团中央在1.56年赠给温州青年志愿垦荒队的旗帜“建设伟大祖国的大陈岛”，这面旗帜承载着一件件珍贵的档案史料和一个个生动的历史场景，大陈岛激情燃烧的垦荒史、波澜壮阔的发展史，宛如画卷般展现在眼前。“大陈岛垦荒精神”是台州的城市精神，是这座城市发展生生不息的力量源泉。1.56年到1.60年，温州、台州两地467名青年陆续上岛支援建设，他们卷起裤管，咬紧牙关，用血和汗锻炼成了一个个生产能手，在荒岛上发展出种植业、畜牧业和海洋养殖业。一代垦荒人用青春和汗水孕育了“艰苦创业、奋发图强、无私奉献、开拓创新”

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上海国资 2024年第4期 9-10页

作者： 1.新华社 2.国家数据局新华社国家数据局

国务院国资委全面深化改革领导小组召开2024年第一次全体会议2024年3月29日，国务院国资委全面深化改革领导小组召开2024年第一次全体会议。会议指出，今年是深入实施国有企业改革深化提升行动承上启下的关键一年，要聚焦重点难点任务...

国务院国资委全面深化改革领导小组召开2024年第一次全体会议2024年3月29日，国务院国资委全面深化改革领导小组召开2024年第一次全体会议。会议指出，今年是深入实施国有企业改革深化提升行动承上启下的关键一年，要聚焦重点难点任务全力攻坚，紧盯重点任务和关键时点，全力以赴抓好各项任务落实。

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