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Unexpected/contrary behavior of aerosol mass concentration in response to the individual components'concentration reduction in Kitakyushu,Japan

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Journal of Environmental Sciences 2024年第1期135卷 630-639页

作者： xi Zhang Takuya Murakami Jinhe Wang Masahide Aikawa Faculty of Environmental Engineering The University of Kitakyushu1-1HibikinoWakamatsuKitakyushuFukuoka 808-0135Japan Resources and Environment Innovation Research Institute School of Municipal and Environmental EngineeringShandong Jianzhu UniversityJinan 250101China

In the suburbs of Kitakyushu,Japan,the inorganic aerosol mass concentration(IAM)was about 32.7μg/m^(3),with the aerosol pH of *** study the thermodynamics of aerosol when its individual components'concentration is reduced,sensitive tests were performed using the ISORROPIAⅡmodel,in which the seven control species—TNaCl,TNH_(4)^(+),TSO_(4)^(2.),TNO_(3)^(-),TMg^(2.),TK^(+),and TCa^(2.)—were taken into *** and inorganic aerosol pH after reducing TNaCl,TNO_(3)^(-),TMg^(2.),TK^(+),and TCa^(2.)responded linearly(0%≤concentration reduction ratio(CRR)≤100%,with the exception of 100%in TNaCl);the nonlinear variations of these two parameters could be observed by controlling TNH_(4)^(+)and TSO_(4)^(2.).Unexpected aerosol behavior occurred at 100%reduction of TNaCl,which was caused by the sudden increase of NO_(3)^(-),NH_(4)^(+),and aerosol liquid water content(ALWC);the increase of IAM was also observed after controlling TSO_(4)^(2.)(60%≤CRR≤100%)and TCa^(2.)(0%≤CRR≤100%),which was mainly related to the variation of ALWC driven by the response of CaSO_(4).Multiple regression analysis showed that ALWC was statistically and strongly related to the variations of NO_(3)^(-),Cl-,SO_(4)^(2.),HSO_(4)^(-),HNO_(3),and NH_(3)(P2.,1.83,2.81,0.34,and 0.57,*** highest coefficient(5.2.)was found for Cl^(-),revealing that sea salts significantly influenced particle ***,this study comprehensively investigated aerosol characteristics and inner responses for the reduction of components,which is of great significance for a better understanding of atmospheric chemistry in Kitakyushu,Japan.

关键词： Sensitive tests Reduction Gas-particle conversion process Aerosol liquid water content Sea salts

Density functional study on enantioselective reduction of keto oxime ether with borane catalyzed by oxazaborolidine

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Science china Chemistry 2006年第4期49卷 296-307页

作者： LI Ming1, ZHENG Wenxu2.& TIAN Anmin2.1. Department of Chemistry, Southwest-china normal {2., Chongqing 400715, china 2. Department of Chemistry, Sichuan {2., Chengdu 610064, china 1. Department of Chemistry Southwest-China Normal University Chongqing 400715 China 2. Department of Chemistry Sichuan University Chengdu 610064 China

The enantioselective reduction of keto oxime ether with borane catalyzed by oxazaborolidine is discussed by the density functional theory (DFT) method. The main intermediates and transition states for this reaction are optimized completely at the B3LYP/6-31g(d) level, and the transition states are verified by vibrational modes. As shown, the chirality-controlled steps for this re- action are the hydride transfer from borane to carbonyl carbon and oxime carbon of keto oxime ether, and the chirality for the reduced products is determined in these two reaction steps. In all examined reaction paths, the first hydride is transferred via a six-membered ring and the second hydride via a five-membered ring or a four-membered ring.

关键词： keto oxime ether, oxazaborolidine, enantioselective reduction, DFT.

Responses of growth performance,antioxidant function,small intestinal morphology and mRNA expression of jejunal tight junction protein to dietary iron in yellow-feathered broilers

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Journal of Integrative Agriculture 2024年第4期23卷 1329-1337页

作者： Kaiwen Lei Hao Wu Jerry W Spears xi Lin xi Wang Xue Bai Yanling Huang Key Laboratory of Animal Science of State Ethnic Affairs Commission Southwest Minzu UniversityChengdu 610041China Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Southwest Minzu UniversityChengdu 610041China Department of Animal Science North Carolina State UniversityRaleighNC 27695-7621USA

This study aimed to investigate the dose-effect of iron on growth performance,antioxidant *** morphology,and mRNA expression of jejunal tight junction protein in 1-to2.-d-old yellow-feathered broilers.A total of 72.1-d-old yellow-feathered maleb roilers were allocated to 9 treatments with 8 replicate cages of 10 birds per *** dietary treatments were consisted of a basal diet(contained 79.6 mg Fe kg^(-1))supplemented with 0,2.,40,60,80,160,32.,640,and 1,2.0 mg Fe kg^(-1)in the form of FeSO_(4)·7H_(2.*** with the birds in the control group,birds supplemented with 2.mg Fe kg^(-1)had higher average daily gain(ADG)(P2.0 mg Fe kg^(-1)significantly decreased ADG(P2.mg Fe kg^(-1).Malondialdehyde(MDA)concentration in plasma and duodenum increased linearly(P2. mg Fe kg^(-1),the supplementation of640 mg Fe kg^(-1)or higher increased(P?0.05)MDA concentrations in plasma,duodenum,and jejunum,decreased VH in the duodenum and jejunum,and the addition of 1,2.0 mg Fe kg^(-1)reduced(P?0.05)the jejunal tight junction protein(claudin-1,ZO-1,occludin)mRNA *** summary,640 mg of supplemental Fe kg^(-1)or greater was associated with decreased growth performance,increased oxidative stress,disrupted intestinal morphology,and reduced mRNA expression of jejunal tight junction protein.

关键词： iron yellow-feathered broiler antioxidant function intestinal morphology tight junction protein

Potential energy surfaces for low-lying electronic states of SO_2

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Science china Chemistry 2006年第4期49卷 289-295页

作者： LI Anyang1, SUO Bing2. WEN Zhenyi2.& WANG Yubin2.1. Shanxi Key Laboratory of Physico-inorganic Chemistry, Department of Chemistry, Northwest university, xi’an 710069, china 2. Institute of Modern Physics, Northwest university, xi’an 710069, china 1. Shanxi Key Laboratory of Physico-inorganic Chemistry Department of Chemistry Northwest University Xi’an 710069 China 2. Institute of Modern Physics Northwest University Xi’an 710069 China

The potential energy surfaces for the nine low-lying electronic states of SO2.have been constructed by using the multi-reference second order perturbation theory (MRPT2. with the basis set cc-pVTZ. The optimized geometries and the adiabatic excitation energies of these states are in good agreement with experiments and previous calculations. The crossings and avoided crossings dis- played in the potential energy surfaces are expounded.

关键词： cross of PES, MRPT2. SO2 (sulfur dioxide).

Wave Solutions for the GinzburgLandau-BBM Equations (I)

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Communications in Nonlinear Science and Numerical Simulation 1998年第4期3卷 218-221页

作者： Murong JIANG and Yawei TIAN(Department of Mathematics, Yunnan university, Kunming 650091, china)(Graduate School of china Academy of Engineering and Physics, P.O.Box 2.10 Beijing100081, china)(Computer Department, shaanxi normal university, xi’an 710062. Department of Mathematics Yunnan University Kunming 650091 China Graduate School of china Academy of Engineering and Physics P.O.Box 2010 Beijing 100081 China Computer Department Shanxi Normal University Xi'an 710062 China

In this paper, the stability of plane wave solutions for the GinzburgLandau-BBM equations are considered. When the coefficients are suitably constrained,these waves are stable.

关键词： stability the Ginzburg- Landau- BBM equations plane wave solutions

BLOW-UP OF SOLUTIONS OF THE IGNITION　MODEL

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Journal of Systems Science & Complexity 2002年第3期15卷 278-281页

作者： LI Yarding (Faculty of Science, xi’an Jiaotong university, xi’an 710049, china)WU Jianhua (Department of Mathematics,{2., xi’an 710062. china) Faculty of Science Xi'an Jiaotong University Xi'an 710049 Department of Mathematics Shaanxi Normal University Xi'an 710062

By use of maximum principle and auxiliary function method,the paper discusses the blow-up sets of the solutions of the ignition model in two cases,It is obtained that the solutions blow up in single point in nonsymmet... 详细信息

关键词： Blow-up set ignition model maximum principle.

Parameter-Free Shifted Laplacian Reconstruction for Multiple Kernel Clustering

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 1072-1074页

作者： xi Wu Zhenwen Ren F.Richard Yu the School of National Defence Science and Technology Southwest University of Science and TechnologyMianyang 621010China the School of National Defence Science and Technology Southwest University of Science and TechnologyMianyang 621010 the Guangxi Key Laboratory of Machine Vision and Intelligent Control Wuzhou UniversityWuzhou 543002 the Guangdong Laboratory of Artificial Intelligence and Digital Economy(SZ) Shenzhen 518060China

Dear Editor,This letter proposes a parameter-free multiple kernel clustering(MKC)method by using shifted Laplacian *** MKC can effectively cluster nonlinear data,but it faces two main challenges:1)As an unsupervised method,it is up against parameter problems which makes the parameters intractable to tune and is unfeasible in real-life applications;2.Only considers the clustering information,but ignores the interference of noise within Laplacian.

关键词： parameter letter Parameter

“Blocking and rebalance”mechanism-guided design strategies of bimetallic doped 2. a-phosphorus carbide as efficient catalysts for N_(2. electroreduction

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Journal of Energy Chemistry 2024年第10期97卷 68-78,I0003页

作者： Cheng He Jianglong Ma Shen xi Wenxue Zhang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong UniversityXian 710049ShanxiChina School of Materials Science and Engineering Chang'an UniversityXi'an 710064ShaanxiChina

Compared to single atom catalysts(SACs),the introduction of dual atom catalysts(DACs)has a significantly positive effect on improving the efficiency in the electrocatalytic nitrogen reduction reaction(NRR)which provides an environmental alternative to the Haber-Bosch ***,the research on the mechanism and strategy of designing bimetallic combinations for better performance is still in its early ***,based on"blocking and rebalance"mechanism,45 combinations of bimetallic pair dopedα-phosphorus carbide(TM_(A)TM_(B)@PC)are investigated as efficient NRR catalysts through density functional theory and machine learning *** a multi-step screening,the combinations of TiV,TiFe,MnMo,and FeW exhibit highly efficient catalytic performance with significantly lower limiting potentials(-0.17,-0.18,-0.14,and-0.30 V,respectively).Excitingly,the limiting potential for CrMo and CrW combinations is 0 V,which are considered to be extremely suitable for the NRR *** mechanism of"blocking and rebalance"is revealed by the exploration of charge transfer for phosphorus atoms in electron blocking ***,the descriptorφis proposed with machine learning,which provides design strategies and accurate prediction for finding efficient *** work not only offers promising catalysts TM_(A)TM_(B)@PC for NRR process but also provides design strategies by presenting the descriptorφ.

关键词： DACs Nitrogen reduction reaction 2. a-phosphorus carbide Inherent attributes Machine learning

安西荒漠植物群落和优势种的分布与环境的关系

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Acta Botanica Sinica 1998年第11期40卷 1047-1052页

作者： WANG xiao An (College of Life Science, shaanxi normal university, xi’an 710062. College of Life Science Shaanxi Normal University Xi'an 710062 China

应用排序（ＤＣＡ）和回归分析方法对安西砾石戈壁荒漠植物群落及优势种的分布与环境的关系进行了研究。结果表明，该区群落的盖度（Ｃ）和密度（Ｄ）均与年降水量（Ｒ）有密切关系，而群落的种类丰富度（Ｎ）则与土壤含盐量（Ｓ）相关... 详细信息

应用排序（ＤＣＡ）和回归分析方法对安西砾石戈壁荒漠植物群落及优势种的分布与环境的关系进行了研究。结果表明，该区群落的盖度（Ｃ）和密度（Ｄ）均与年降水量（Ｒ）有密切关系，而群落的种类丰富度（Ｎ）则与土壤含盐量（Ｓ）相关，其回归关系式为：Ｃ＝０．０５１９６８１６３ｅ０．０４０７８６８２１Ｒ（Ｒ＝０．９５，Ｐ＜０．０１），Ｄ＝０．２７１４７９１３ｅ０．０５２７４１８２９Ｒ（Ｒ＝０．９６，Ｐ＜０．０１），Ｎ＝１３．７７４８－６．４７７３０３ｌｇ１０００Ｓ（Ｒ＝０．８３，Ｐ＜０．０１）。即：年降水量是决定戈壁荒漠植物群落盖度和密度的主要因素，土壤含盐量则与群落种类丰富度的关系尤为突出。优势种的抗旱性顺序是：红砂（Ｒｅａｕｍｕｒｉａｓｏｎｇｏｒｉｃａ（（Ｐａｌ．）Ｍａｘｉｍ．）＞泡泡刺（ＮｉｔｒａｒｉａｓｐｈａｅｒｏｃａｒｐａＭａｘｉｍ．）＞黑柴（ＳｙｍｐｅｇｍａｒｅｇｅｌｉＢｇｅ．）＞珍珠（ＳａｌｓｏｌａｐａｓｅｒｉｎａＢｇｅ．）＞膜果麻黄（ＥｐｈｅｄｒａｐｒｚｅｗａｌｓｋｉＳｔａｐｆ．）。

关键词：荒漠植物群落优势种分布抗旱性抗盐性