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Desulfurization ability of refining slag with medium basicity

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International Journal of Minerals,Metallurgy and Materials 2014年第12期21卷 1160-1166页

作者： Hui-xiang yu Xin-hua Wang mao Wang Wan-jun Wang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

The desulfurization ability of refining slag with relative lower basicity （B） and Al2O3 content （B = 3.5-5.0; 20wt%-25wt% Al2O3） was studied. Firstly, the component activities and sulfide capacity （Cs） of the slag were calculated. Then slag-metal equilibrium experiments were carried out to measure the equilibrium sulfur distribution （Ls）. Based on the laboratorial experiments, slag composition was optimized for a better desulfurization ability, which was verified by industrial trials in a steel plant. The obtained results indicated that an MgO-saturated CaO-Al2O3-SiO2-MgO system with the basicity of about 3.5-5.0 and the Al2O3 content in the range of 20wt%-25wt% has high activity of CaO （αCaO）, with no deterioration of Cs compared with conventional desulfurization slag. The measured Ls between high-strength low-alloyed （HSLA） steel and slag with a basicity of about 3.5 and an Al2O3 content of about 20wt% and between HSLA steel and slag with a basicity of about 5.0 and an Al2O3 content of about 25wt% is 350 and 275, respectively. The new slag with a basicity of about 3.5-5.0 and an Al2O3 content of about 20wt% has strong desulfurization ability. In particular, the key for high-efficiency desulfurization is to keep oxygen potential in the reaction system as low as possible, which was also verified by industrial trials.

关键词： high-strength steel low alloyed steel refining slag basicity desulfurization thermodynamic calculations

Unbalanced classification method using least squares support vector machine with sparse strategy for steel surface defects with label noise

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Journal of Iron and Steel Research International 2020年第12期27卷 1407-1419页

作者： Li-ming Liu mao-xiang Chu Rong-fen Gong Xin-yu Qi School of Electronic and Information Engineering University of Science and Technology LiaoningAnshan 114051LiaoningChina

Least squares support vector machine (LS-SVM) plays an important role in steel surface defects classification because of its high speed. However, the defect samples obtained from the real production line may be noise. LS-SVM suffers from the poor classification performance in the classification stage when there are noise samples. Thus, in the classification stage, it is necessary to design an effective algorithm to process the defects dataset obtained from the real production line. To this end, an adaptive weight function was employed to reduce the adverse effect of noise samples. Moreover, although LSSVM offers fast speed, it still suffers from a high computational complexity if the number of training samples is large. The time for steel surface defects classification should be as short as possible. Therefore, a sparse strategy was adopted to prune the training samples. Finally, since the steel surface defects classification belongs to unbalanced data classification, LSSVM algorithm is not applicable. Hence, the unbalanced data information was introduced to improve the classification performance. Comprehensively considering above-mentioned factors, an improved LS-SVM classification model was proposed, termed as ILS-SVM. Experimental results show that the new algorithm has the advantages of high speed and great anti-noise ability.

关键词： Steel surface defect Least squares support vector machine Anti-noise Sparseness Unbalanced data

Effects of nitrogen ion irradiation on endoglucanase activity and gene mutation of Bacillus subtilis Bac01

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Nuclear Science and Techniques 2009年第5期20卷 271-276页

作者： LU Jie mao Peihong JIN xiang yu Long YING Hanjie College of Biotechnology and Pharmaceutical Engineering Nanjing University of Technology 210009 Nanjing China Center oflon Beam Biotechnology College of Physics Science and Technology Xinjiang University 830008 Urumqi China

Bacillus subtilis Bac01 was mutated by 15 keV N+ ions of 1.5×1016 cm-2. The mutant strain Bac11 with high yield of endoglucanase was isolated using carboxymethylcellulose sodium and congo red indicative plates. It exhibited higher endoglucanase activitiy (381.89IU) than the original strain Bac01 (93.33IU). Two 1,500 bp endoglucanase gene fragments were obtained with PCR amplification from B. subtilis Bac01 and mutant strain Bac11. BLAST comparison result indicated that 10 nucleotides mutated. Bioinformatics methods were used to analyze the two predicted amino acid sequences, and it was found that 5 amino acid residues changed, being all in the cellulose-binding domain of endoglucanase.

关键词：放射性能级核技术研究氮离子

The Analysis of Impact of Brexit on the Post-Brexit EU Using Intervented Multivariate Time Series

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Acta Mathematicae Applicatae Sinica 2021年第3期37卷 441-458页

作者： yu TIAN Shao-pei MA Rong-xiang RUI Zhen yu mao-zai TIAN Institute for Diplomacy and International Governance Loughborough University LondonE203BSUK Center for Applied Statistics School of StatisticsRenmin University of ChinaBeijing 100872China College of Medical Engineering and Technology Xinjiang Medical UniversityUrumqi 830011China School of Statistics and Data Science Xinjiang University of Finance and EconomicsUrumqi 830012China School of Statistics Lanzhou University of Finance and EconomicsLanzhou 730101China

The UK is the most important partner of the EU in terms of economic and other fields due to the geographical *** was one of the largest economies in the EU and its per capita income is higher than the EU average,so it is a net contributor to the *** UKs membership of the EU ended on 31 January 2019,there are concerns that the Brexit may have a significant impact on the EU,resulting in social,economic,political,and institutional changes,*** *** the impact of Brexit on the UK has always been the subject of considerable scholarly interest in recent years,there is relatively little literature on the impact of Brexit on the *** paper focuses on the evaluation of the impact of Brexit on the EU economy and other relevant aspects along three dimensions:GDP,PPP,Quarterly GDP *** powerful quantitative analysis technology that includes vector autoregression model,multivariate time series model with intervention variables,and autoregression integrated moving average,this paper obtains the important and novel evidence about the potential impact of Brexit on the EU economy,pointing out that Brexit is of far-reaching significance to the *** analysis uses several statistical models to screen out several key influencing factors,which can be used to predict the total GDP of EU in the next five *** results show that EU economy will react negatively to"no-deal"Brexit,and its growth rate of economy will slow down significantly in next 5 ***,we put forward relevant policy suggestions on how to deal with the negative impact of Brexit on EU.

关键词： intervention multivariate time series model Brexit economy gaping Brexit hole no-deal Brexit post-Brexit EU

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肺癌患者化疗前后红细胞免疫功能的动态研究

山东大学学报（医学版） 2004年第3期42卷 297-298,308页

作者：窦建明迟翔宇雷茂禄山东省立医院呼吸内科山东济南250021

目的:了解肺癌患者化疗前后的红细胞免疫功能?方法:应用郭峰法检测肺癌患者化疗前后的红细胞C3b受体花环(RBC-C3bR)?红细胞免疫复合物花环(RBC-ICR)?肿瘤红细胞花环(ATER)的动态变化?结果:肺癌组RBC-C3bR ?ATER明显低于健康对照组(P<0.0... 详细信息

目的:了解肺癌患者化疗前后的红细胞免疫功能?方法:应用郭峰法检测肺癌患者化疗前后的红细胞C3b受体花环(RBC-C3bR)?红细胞免疫复合物花环(RBC-ICR)?肿瘤红细胞花环(ATER)的动态变化?结果:肺癌组RBC-C3bR ?ATER明显低于健康对照组(P<0.001),RBC-ICR明显高于健康对照组(P<0.001),化疗后第7天,RBC-C3bR?RBC-ICR?ATER较未化疗时均明显降低(P<0.05),化疗后第21天,RBC-C3bR?ATER明显高于未化疗组(P<0.05)?结论:肺癌患者红细胞免疫功能低下,化疗对红细胞免疫功能造成一过性损伤,在化疗后第7天明显?

关键词：肺肿瘤红细胞玫瑰花结形成免疫活性药物疗法

Enhanced electrochemical CO_(2)reduction coupled with urea oxidation using bifunctional atomically dispersed CuNi catalysts

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Nano Research 2025年第1期18卷 208-216页

作者： Wenjie Wu Haoyang Zhou Ying Liu Yifei Pan Qingqing Chen yu Zhang Junjie mao Wenjie Ma Ping yu Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living BiosystemsInstitute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China University of Chinese Academy of Sciences Beijing 100049China

The electrochemical conversion of carbon dioxide(CO_(2))into chemical fuels represents a promising approach for addressing global carbon balance ***,this process is hindered by the kinetic limitations of anodic reactions,usually the oxygen evolution reaction,resulting in less efficient production of high value-added ***,we report an integrated electrocatalytic system that couples CO_(2)reduction reaction(CO_(2)RR)with urea oxidation reaction(UOR)using a bifunctional electrocatalyst with atomically dispersed dual-metal CuNi sites anchored on bamboo-like nitrogen-doped carbon nanotubes(CuNi-CNT),which were synthesized through a one-step pyrolysis *** bifunctional CuNi-CNT catalyst exhibits a near 100%CO Faraday efficiency for CO_(2)RR over a wide potential range and outstanding UOR performance with a negatively shifted potential of 210 mV at 10 mA·cm^(-2).In addition,we assemble a two-electrode electrolyzer using bifunctional CuNi-CNT-modified carbon fiber paper electrodes as both cathode and anode,capable of operating at a remarkably low cell voltage of 1.81 V at 10 mA·cm-2,significantly lower than conventional *** study provides a novel avenue to achieving an efficient carbon cycle with reduced electric power consumption.

关键词： electrochemical conversion bimetallic site catalyst bifunctional electrocatalyst carbon dioxide reduction urea oxidation

Effect of dietary supplementation with mulberry(Morus alba L.) leaves on the growth performance,meat quality and antioxidative capacity of finishing pigs

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Journal of Integrative Agriculture 2019年第1期18卷 143-151页

作者： ZENG Zhu JIANG Jun-jie yu Jie mao xiang-bing yu Bing CHEN Dai-wen Key Laboratory for Animal Disease-Resistant Nutrition Ministry of Education/Institute of Animal NutritionSichuan Agricultural University

The present study was conducted to evaluate the effect of dietary mulberry(Morus alba L.) leaves powder(MLP) supplementation on meat quality of finishing pigs.A total of 40 Duroc×Landrace×Yorkshire pigs(initial body weight of(40.5±0.63) kg) were randomly allotted into two treatments,fed either with control diet or 15% MLP diet for 85 *** results showed that MLP diet decreased(P≤0.05) average daily gain(ADG) and increased(P<0.05) feed/gain ratio(F/G) in the finishing and whole *** diet also decreased(P<0.05) carcass weight,dressing percentage,last rib and average backfat ***,MLP diet increased(P<0.05) intramuscular fat(IMF) content,decreased(P<0.05) shear force,cooking loss and drip *** addition,MLP diet increased(P<0.05) total antioxidative capacity,glutathione peroxidase and tended(P<0.10) to increase total superoxide dismutase in *** longissimus thoracis,myosin heavy chain(MyHC) I and IIa mRNA levels were increased(P≤0.05) for MLP *** conclusion,15% MLP supplementation reduced the growth performance and carcass traits,but improved meat quality of finishing pigs possibly through the change of myofiber characteristics,enhancement of antioxidative capacity and increase of IMF.

关键词： mulberry leaves powder meat quality myofibers antioxidation pigs

A new pelagic Polyconchoecia xiang, Chen and Du, 2018(Ostracoda:Myodocopa:Halocyprididae) from the South China Sea

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Acta Oceanologica Sinica 2020年第4期39卷 73-83页

作者： Peng xiang yu Wang Ruixiang Chen Youyin Ye Chunguang Wang Xiaoyin Chen mao Lin Laboratory of Marine Biology and Ecology Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China Collaborative Innovation Center of Deep Sea Biology Hangzhou 310012China

Halocyprid ostracods are appreciable part of ostracods floating through virtually everywhere in marine *** this study,we describe a new species of genus Polyconchoecia xiang,Chen and Du,2018,tribe Conchoeciini Chavtur and Angel,2011,family Halocyprididae Dana,1853 from the middle of the South China *** chenii *** very close to *** xiang,Chen and Du,*** it differs from *** by the distinctions of locations of major glands of carapace and the characteristics of appendages:more posteriorly situated left asymmetric gland of carapace,no right asymmetric gland;segmented frontal organ;the endopod 2 of the first antenna with a very small seta;a-and c-setae of the first antenna with long end joint have long end joint,the b-and d-setae have no end joint,spinose e-seta without end joint;the e-seta of the second antenna is present;teeth side is distinctive;the setal counts of the mandible,maxilla,fifth limb,and sixth limb are *** locations of the major glands on carapace and the characteristics of the first antenna can be the key of the new *** work is the second discovery of the genus Polyconchoecia from the world.

关键词： taxonomy Ostracoda Halocyprididae Conchoeciini Polyconchoecia chenii sp.nov. new species South China Sea

A computational study of the wing-wing and wing-body interactions of a model insect

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Acta Mechanica Sinica 2009年第4期25卷 421-431页

作者： Xin yu mao Sun Institute of Applied Physics and Computational Mathematics Beihang University 100191 Beijing China Institute of Fluid Mechanics Beihang University 100191 Beijing China

The aerodynamic interaction between the contralateral wings and between the body and wings of a model insect are studied, by using the method of numerically solving the Navier-Stokes equations over moving overset grids, under typical hovering and forward flight conditions. Both the interaction between the contralateral wings and the interaction between the body and wings are very weak, e.g. at hovering, changes in aerodynamic forces of a wing due to the present of the other wing are less than 3% and changes in aerodynamic forces of the wings due to presence of the body are less than 2%. The reason for this is as following. During each down- or up-stroke, a wing produces a vortex ring, which induces a relatively large jet-like flow inside the ring but very small flow outside the ring. The vortex rings of the left and right wings are on the two sides of the body. Thus one wing is outside vortex ring of the other wing and the body is outside the vortex rings of the left and right wings, resulting in the weak interactions.

关键词： Insect Aerodynamics Wing/winginteraction Wing/body interaction