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Molecular mapping of a novel wheat powdery mildew resistance gene Ml92145E8-9 and its application in wheat breeding by marker-assisted selection
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作者 Xiaocheng Yu Shizhong Ren +8 位作者 Lanfei Zhao Jun Guo Yinguang Bao Yingxue Ma Hongwei Wang Herbert W.Ohm Dazhao Yu Hongjie Li Lingrang Kong 《The Crop Journal》 SCIE CAS CSCD 2018年第6期621-627,共7页
Powdery mildew, caused by Blumeria graminis f. sp. tritici(Bgt), is one of the most devastating diseases of common wheat(Triticum aestivum L.). The wheat line 92145 E8-9 is immune to Bgt isolate E09. Genetic analysis ... Powdery mildew, caused by Blumeria graminis f. sp. tritici(Bgt), is one of the most devastating diseases of common wheat(Triticum aestivum L.). The wheat line 92145 E8-9 is immune to Bgt isolate E09. Genetic analysis reveals that the powdery mildew resistance in 92145 E8-9 is controlled by a single dominant gene, temporarily designated Ml92145 E8-9. Bulkedsegregant analysis(BSA) with simple sequence repeat(SSR) markers indicates that Ml92145 E8-9 is located on chromosome 2 AL. According to the reactions of 92145 E8-9,VPM1(Pm4 b carrier), and Lankao 906(PmLK906 carrier) to 14 Bgt isolates, the resistance spectrum of 92145 E8-9 differs from those of Pm4 b and PmLK906, both of which were previously localized to 2 AL. To test the allelism among Ml92145 E8-9, Pm4 b and PmLK906, two F2 populations of 92145 E8-9 × VPM1(Pm4 b) and 92145 E8-9 × Lankao 906(PmLK906) were developed in this study. Screening of 784 F2 progeny of 92145 E8-9 × VPM1 and 973 F2 progeny of 92145 E8-9 × Lankao 906 for Bgt isolate E09 identified 37 and 19 susceptible plants, respectively. These findings indicated that Ml92145 E8-9 is non-allelic to either Pm4 b or PmLK906. Thus, Ml92145 E8-9 is likely to be a new powdery mildew resistance gene on2 AL. New polymorphic markers were developed based on the collinearity of genomic regions of Ml92145 E8-9 with the reference sequences of the International Wheat Genome Sequencing Consortium(IWGSC). Ml92145 E8-9 was mapped to a 3.6 c M interval flanked by molecular markers Xsdauk13 and Xsdauk682. This study also developed five powdery mildew-resistant wheat lines(SDAU3561, SDAU3562, SDAU4173, SDAU4174, and SDAU4175)using flanking marker-aided selection. The markers closely linked to Ml92145 E8-9 would be useful in marker-assisted selection for wheat powdery mildew resistance breeding. 展开更多
关键词 Marker-assisted selection Ml92145E8-9 Powdery MILDEW TRITICUM AESTIVUM L.
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Grain selection and growth orientation of prior-β phase for Ti-6-4 during additive manufacturing:insights from a modeling perspective
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作者 Wei-zhao Sun Fei-hu Shan +2 位作者 Nan-fu Zong Hong-biao Dong Tao Jing 《China Foundry》 SCIE CAS 2021年第2期83-93,共11页
The microstructure of Ti-6-4 components produced by additive manufacturing suffers from the coarse and elongated prior-β grain,which leads to a decrease of the tensile behavior and the occurrence of anisotropy.To und... The microstructure of Ti-6-4 components produced by additive manufacturing suffers from the coarse and elongated prior-β grain,which leads to a decrease of the tensile behavior and the occurrence of anisotropy.To understand and control the grain evolution,a multiscale simulation is applied to investigate the relationship between the grain selection,growth orientation,and the molten pool morphology with the different deposition layer numbers and processing parameters.The accuracy of the simulation is validated by experiments in both qualitative and quantitative ways.Results show that when the grain with unfavorable orientation loses the competitive growth with its neighbors,there will be a great chance that the blocked grain is eliminated in the following layer-and-layer deposition,which leads to the increase of the grain width.The size of the molten pool increases remarkably as the layer number increases,which lays a heavy burden on the stability of the molten pool.The analytical relationship between the molten pool morphology and the grain growth orientation is also deduced.The flat molten pool causes the grains with the <001> direction close to the building direction to have greater survival potential.Besides,decreasing the line power energy shows little effect on the stability of the molten pool and the grain growth orientation,especially when the deposited layer number is large.The revealing mechanisms will help in understanding and further controlling the grain evolution. 展开更多
关键词 additive manufacturing Ti-6-4 simulation grain selection grain growth
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Information Environmental sciences update referneces in Chinese journals——Selected from Acta Scientiae Circumstantiae,ISSN 0253-2468;Environental Chemistry,ISSN0254-6108;Acta Ecologica Sinica,ISSN 100-0933
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《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1993年第2期241-243,共3页
关键词 ISSN Information Environmental sciences update referneces in Chinese journals selected from Acta Scientiae Circumstantiae ISSN 0253-2468 Environental Chemistry ISSN0254-6108 Acta Ecologica Sinica ISSN 100-0933
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评估小麦—黑麦重组系“Selection 212”对叶锈和秆锈的抗性
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作者 J.B.Sharma 邱郭莲 《国外作物育种》 2002年第1期23-23,共1页
关键词 小麦-黑麦 重组系 selection212 叶锈 秆锈 抗性
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Table 1.FDI flows,by region and selected countries,1994-2005
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《China Textile》 2006年第4期7-7,共1页
关键词 FDI Table 1.FDI flows by region and selected countries 1994-2005
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λ-超凸空间中的一个选择定理及其应用 被引量:2
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作者 赵富坤 吴鲜 杨泽恒 《数学杂志》 CSCD 北大核心 2006年第1期109-112,共4页
本文研究度量空间中取非空λ外超凸值的集值映象的选择问题.利用Zorn引理,得到了一个选择定理.作为应用,得到了一个不动点定理,并且证明了有界λ超凸空间中1λLipschitzian集值映象的不动点集为λ超凸集.
关键词 λ-超凸度量空间 λ-外超凸集合 λ—lipschitzian选择 λ—lipschitzian保核收缩映象
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Breeding and Cultivation Techniques of Edible Sunflower Variety AR9-9293 被引量:3
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作者 刘胜利 柳延涛 +3 位作者 王鹏 李万云 王波 段维 《Agricultural Science & Technology》 CAS 2017年第9期1642-1644,共3页
Edible sunflower variety AR9-9293 was approved by the Sunflower Variety Appraisal Committee with the country Identification number of sunflower 2015005. This paper introduced the breeding process, yield performance an... Edible sunflower variety AR9-9293 was approved by the Sunflower Variety Appraisal Committee with the country Identification number of sunflower 2015005. This paper introduced the breeding process, yield performance and characteristics, and the high-yield cultivation technology of new edible sunflower variety AR9-9293. The promotion of edible sunflower varieties and cultivation technology could achieve the effects of improving the level of the sunflower cultivation, promoting the development of rural and agricultural economy and increasing farmers' income, as well as positively promoting development of the society and adjusting agricultural industry structure. 展开更多
关键词 New oil sunflower hybrid AR9-9293 selection Cultivation technology
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有限簇多值Φ-拟伪压缩型映射公共不动点的迭代程序
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作者 冯先智 倪仁兴 《浙江大学学报(理学版)》 CAS CSCD 北大核心 2010年第2期137-143,共7页
引入具误差的修正Mann和Ishikawa迭代程序及多值Φ-拟伪压缩型映射,在一致光滑实Banach空间证明了此迭代序列强收敛于具广义Lipschitzian连续的(一般未必连续或有界)多值Φ-拟伪压缩型映射有限簇的唯一公共不动点,统一和发展了包括王林... 引入具误差的修正Mann和Ishikawa迭代程序及多值Φ-拟伪压缩型映射,在一致光滑实Banach空间证明了此迭代序列强收敛于具广义Lipschitzian连续的(一般未必连续或有界)多值Φ-拟伪压缩型映射有限簇的唯一公共不动点,统一和发展了包括王林和王刚(2006年)、周海云(2006年)、HUANG(2002年)、曾六川(2005年)、徐裕光(2004年)、张石生(2000年)和倪仁兴(2001和2002年)等近期许多相关结果. 展开更多
关键词 多值Φ-拟伪压缩型映射有限簇 具误差的修正的迭代程序 广义lipschitzian连续 公共不动点
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气相色谱-负化学源质谱联用法测定水产品及食用油中氟乐灵的残留量 被引量:9
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作者 王莉 夏广辉 +5 位作者 沈伟健 吴斌 张睿 陆慧媛 沈崇钰 赵增运 《色谱》 CAS CSCD 北大核心 2014年第3期314-317,共4页
建立了一种可用于水产品及食用油中氟乐灵残留量分析的分散型固相萃取-气相色谱-负化学离子源质谱方法。水产品及食用油经乙腈提取,4℃冷藏后,采用分散型固相萃取法净化,由气相色谱-负化学离子源质谱选择离子监测技术进行测定与确证... 建立了一种可用于水产品及食用油中氟乐灵残留量分析的分散型固相萃取-气相色谱-负化学离子源质谱方法。水产品及食用油经乙腈提取,4℃冷藏后,采用分散型固相萃取法净化,由气相色谱-负化学离子源质谱选择离子监测技术进行测定与确证,同位素内标法定量。在1~40μg / L 范围内氟乐灵农药的线性关系良好;方法定量限(LOQ)为0.02μg / kg;对鳗鱼、烤鳗、梭子蟹、小龙虾、猪油和橄榄油等6种复杂基质进行1.0、2.0和3.0μg / kg 等3个水平的添加回收试验,平均回收率均处于80%~100%之间,RSD≤10.3%;无干扰现象出现。该方法可作为水产品及食用油中氟乐灵残留检测的确证方法。 展开更多
关键词 分散型固相萃取 气相色谱-负化学离子源质谱联用 选择离子监测 氟乐灵 水产品 食用油 disperse solid phase extraction( DSPE) gas chromatography-negative chemical ionization mass SPECTROMETRY ( GC-MS NCI ) selected ion monitoring ( SIM )
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Cleaner and convenient preparation of 3-(4,6-dimethoxy-pyrimidin-2-yloxy)-2-methyl-phenol 被引量:1
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作者 文岳中 方兆华 刘维屏 《Journal of Zhejiang University Science》 EI CSCD 2004年第8期956-959,共4页
Environmental concerns have highlighted the need of cleaner technologies. A cleaner, convenient and selective technology has been developed for the preparation of 3-(4,6-dimethoxy-pyrimidin-2-yloxy)-2-methyl-phenol (... Environmental concerns have highlighted the need of cleaner technologies. A cleaner, convenient and selective technology has been developed for the preparation of 3-(4,6-dimethoxy-pyrimidin-2-yloxy)-2-methyl-phenol (DPMP) from 2-methyl-benzene-1,3-diol in water as solvent. The isolated yield of DPMP is up to 86% in good selectivity. The product structure was characterized by conventional methods, H-NMR and MS. This technology belongs to the modern concept of 1 environmentally friendly low wastes or non-wastes technology (LWNWT). 展开更多
关键词 Cleaner preparation Greener technology selective synthesis 2-methyl-benzene-1 3-diol 3-(4 6-dimeth- oxy-pyrimidin-2-yloxy)-2-methyl-phenol
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Green fuel from coal via Fischer-Tropsch process: scenario of optimal condition of process and modelling
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作者 Hossein Atashil Somayyeh Veiskarami 《International Journal of Coal Science & Technology》 EI 2018年第2期230-243,共14页
Extracting, transportation and the using from fossil fuels can damage to the hydrosphere, the biosphere and the Earth's atmosphere. But humans always need to this valuable substance. The production of oil derivatives... Extracting, transportation and the using from fossil fuels can damage to the hydrosphere, the biosphere and the Earth's atmosphere. But humans always need to this valuable substance. The production of oil derivatives by means of forest waste and coal through the Fischer-Tropsch process is an appropriate solution for the cleanliness of all parts of the environment. For the production of favorite products by the synthesis of Fischer-Tropsch, the performance of the catalyst under different operating conditions should be predictable. For this reason, in this paper, eight mathematical models were determined for the selectivity of five products of methane, light hydrocarbons, gasoline, diesel and wax based on three factors of reduction temperature, time on stream, and He/CO ratio inlet gas on iron-based catalyst. The results showed that the reduction temperature factor had the most effective on the selectivity of hydrocarbon products, exception diesel, so that the increase of the reduction temperature led to increase of the selectivity of methane, light hydrocarbons, gasoline and reduce of the degree of selectivity of the wax and vice versa. For the diesel selectivity, factor of the He/CO ratio inlet gas was the most effective than other factors. 展开更多
关键词 Fischer-Tropsch process - selectivity model Iron based catalyst BIOMASS Oil derivatives
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Selective Oxidation of Methane to Methanol Using Molecular Oxygen on MoOx/(LaCoO3+Co3O4)Catalysts
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作者 Xin ZHANG, De Hua HE, Qi Jiang ZHANG, Bo Qing XU, Qi Ming ZHUState Key Laboratory of C1 Chemistry and Technology, Department of Chemistry, Tsinghua University, Beijing 100084 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第10期1066-1069,共4页
Comparatively high CH3OH selectivity (60.0%) and yield (6.7%) were obtained on MoOx/(LaCoO3+Co3O4) catalysts in selective oxidation of methane to methanol using molecular oxygen as oxidant. The interaction between MoO... Comparatively high CH3OH selectivity (60.0%) and yield (6.7%) were obtained on MoOx/(LaCoO3+Co3O4) catalysts in selective oxidation of methane to methanol using molecular oxygen as oxidant. The interaction between MoOx and La-Co-oxide modified the molecular structure of molybdenum oxide and the ratio of O7O ' on the catalyst surface, which controlled the catalytic performance of MoOx/(LaCoO3+Co3O4) catalysts. 展开更多
关键词 METHANE selective oxidation METHANOL molybdenum oxide species O-/O2- ratio.
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Study on Support Vector Machine Based on 1-Norm
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作者 潘美芹 贺国平 +2 位作者 韩丛英 薛欣 史有群 《Journal of Donghua University(English Edition)》 EI CAS 2006年第6期148-152,共5页
The model of optimization problem for Support Vector Machine(SVM) is provided, which based on the definitions of the dual norm and the distance between a point and its projection onto a given plane. The model of impro... The model of optimization problem for Support Vector Machine(SVM) is provided, which based on the definitions of the dual norm and the distance between a point and its projection onto a given plane. The model of improved Support Vector Machine based on 1-norm(1-SVM) is provided from the optimization problem, yet it is a discrete programming. With the smoothing technique and optimality knowledge, the discrete programming is changed into a continuous programming. Experimental results show that the algorithm is easy to implement and this method can select and suppress the problem features more efficiently. Illustrative examples show that the 1-SVM deal with the linear or nonlinear classification well. 展开更多
关键词 1- SVM best separating plane feature suppression feature selection.
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Synthesis of 3-O-Benzoyl-1 ,2-O-isopropylidene-a-D-allofuranose and Its Dimesylated Derivative
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作者 张卫红 孟祥启 +1 位作者 冯亚青 刘云华 《Transactions of Tianjin University》 EI CAS 2005年第6期440-445,共6页
Diisopropylidenated α-D-glucofuranose (1) was oxidated with CrO3-pyridine complex. Oxidated product and its hydrate were separated and were reduced together to synthesize diisopropylidenated α-D-allofuranose ( 3... Diisopropylidenated α-D-glucofuranose (1) was oxidated with CrO3-pyridine complex. Oxidated product and its hydrate were separated and were reduced together to synthesize diisopropylidenated α-D-allofuranose ( 3). The yield of 3 increased by 8% than that with only oxidated product as reduction substrate. Benzoylated derivative of 3 was selectively nydrolyzed and dimesylated to synthesize 3-O-benzoyl-1 .2- O- isopropylidene-α-D-allofuranose ( 5 ) and its dimesylated derivative respectively. The overall yield of 5 from 1 was 36%. Each step and final products were analyzed by ^1H-NMR spectra and other methods. The experiments showed that the influence of acetic acid concentration on selective hydrolysis was obvious. The hydrolysis yield was 81.8%. Oxidation. reduction and other procedures were practical and had application potential. 展开更多
关键词 3-O-benzoyl-1. 2-O-isopropylidene-α-D-allofuranose OXIDATION reduction - selective hydrolysis dimesylation
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Homogenization on solution treatment and its effects on the precipitation-hardening of selective laser melted 17-4PH stainless steel
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作者 Sohee An Du-Rim Eo +1 位作者 Il Sohn Kyunsuk Choi 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第35期47-57,共11页
17-4 precipitation-hardened(PH)stainless steel(SS)exhibits high strength and good corrosion resistance via Cu-precipitation hardening.Unlike conventional wrought 17-4PH SS,Cu segregation andε-Cu pre-cipitates are obs... 17-4 precipitation-hardened(PH)stainless steel(SS)exhibits high strength and good corrosion resistance via Cu-precipitation hardening.Unlike conventional wrought 17-4PH SS,Cu segregation andε-Cu pre-cipitates are observed in additively manufactured(AM)17-4PH SS owing to the repeated rapid cooling after heating,which characterizes the AM process.In this study,solution treatment was conducted under various temperatures(1,000,1,050,1,100,and 1,200℃)and durations(1,2,4,and 8 h)to minimize the negative effects of Cu segregation andε-Cu precipitates on precipitation hardening.The mechanical prop-erties and microstructures of each condition for the Cu precipitation behavior were examined.Although theε-Cu precipitates did not disappear after solution treatment,the average diameter of theε-Cu precipi-tates tended to decrease with increasing solution treatment temperature and duration.Therefore,solution treatment at a temperature of 1,200℃ for 8 h was the best,resulting in improved strength compared to the conventional solution treatment at 1,050℃.Solution treatment on at least 1,100℃ is effective in AM. 展开更多
关键词 selective laser melting Cu segregation Solution treatment 17-4 Precipitation-hardened stainless steel Additive manufacturing
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Enhanced Corrosion Resistance and Biofilm Inhibition of Functionally Graded TC4/TC4-5Cu Fabricated by Selective Laser Melting against Streptococcus mutans
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作者 Xing Zhou Qiyue Zhang +5 位作者 Jiarui Lu Ying Zheng Lin Wu Dake Xu Xue Zhang Qiang Wang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2023年第12期1961-1978,共18页
Ti-6Al-4V(TC4)used in dentistry and orthopedics as implant biomaterial faces the risk of microbiologically influenced corrosion(MIC)owing to the residence of diverse oral microorganisms.Hereinto,Streptococcus mutans i... Ti-6Al-4V(TC4)used in dentistry and orthopedics as implant biomaterial faces the risk of microbiologically influenced corrosion(MIC)owing to the residence of diverse oral microorganisms.Hereinto,Streptococcus mutans is a critical pathogenic microorganism that causes dental caries.This work investigated the corrosive effects of S.mutans on TC4 and functional gradient TC4/TC4-5Cu coupons fabricated by selective laser melting(SLM)through various electrochemical measurements,surface examination,observation of biofilm and corrosion analysis.The results indicated that the Cu-bearing alloy showed an inhibitory effect on the biofilms due to the release of Cu element,thereby reducing the corrosion rate of MIC.The corrosion current density(icorr)of TC4(11.7±0.8)nA cm−2 is higher than that of TC4/TC4-5Cu(7.4±0.4)nA cm−2 in the presence of S.mutans,while the maximum pit depth of TC4 is 1.6 times that of TC4/TC4-5Cu.Therefore,metal modification through Cu alloying is an effective strategy to improve the MIC resistance. 展开更多
关键词 Microbiologically influenced corrosion-Streptococcus mutans selective laser melting TC4/TC4-5Cu:Biofilm
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一般变分不等式的三步迭代算法 被引量:12
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作者 闻道君 邓磊 《四川师范大学学报(自然科学版)》 CAS CSCD 北大核心 2009年第4期436-438,共3页
利用变分不等式和不动点问题的等价关系,给出了一个新的求解一般变分不等式的三步迭代算法;该算法在现有的两步迭代算法基础上,利用校正方法建立了第三步迭代公式;最后在适当条件下证明了该算法的收敛性,所得结论推广了该领域内的一些... 利用变分不等式和不动点问题的等价关系,给出了一个新的求解一般变分不等式的三步迭代算法;该算法在现有的两步迭代算法基础上,利用校正方法建立了第三步迭代公式;最后在适当条件下证明了该算法的收敛性,所得结论推广了该领域内的一些最新结果. 展开更多
关键词 一般变分不等式 g- r)-松弛强制映射 g-μ—lipschitzian连续 投影算子
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Selective laser melting 3D printing of Ni-based superalloy: understanding thermodynamic mechanisms 被引量:14
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作者 Mujian Xia Dongdong Gu +3 位作者 Guanqun Yu Donghua Dai Hongyu Chen Qimin Shi 《Science Bulletin》 SCIE EI CAS CSCD 2016年第13期1013-1022,共10页
A mesoscopic model has been established to investigate the thermodynamic mechanisms and densification behavior of nickel-based superalloy during additive manufacturing/three-dimensional (3D) printing (AM/3DP) by n... A mesoscopic model has been established to investigate the thermodynamic mechanisms and densification behavior of nickel-based superalloy during additive manufacturing/three-dimensional (3D) printing (AM/3DP) by numerical simulation, using a finite volume method (FVM). The influence of the applied linear energy density (LED) on dimensions of the molten pool, thermodynamic mechanisms within the pool, bubbles migration and resultant densification behavior of AM/3DP-processed superalloy has been discussed. It reveals that the center of the molten pool slightly shifts with a lagging of 4 ktm towards the center of the moving laser beam. The Mar- angoni convection, which has various flow patterns, plays a crucial role in intensifying the convective heat and mass transfer, which is responsible for the bubbles migration and densification behavior of AM/3DP-processed parts. At an optimized LED of 221.5 J/m, the outward convection favors the numerous bubbles to escape from the molten pool easily and the resultant considerably high relative density of 98.9 % is achieved. However, as the applied LED further increases over 249.5 J/m, the convection pattern is apparently intensified with the formation of vortexes and the bubbles tend to be entrapped by the rotating flow within the molten pool, resulting in a large amount of residual porosity and a sharp reduction in densification of the superalloy. The change rules of the relative density and the corresponding distribution of porosity obtained by experiments are in accordance with the simulation results. 展开更多
关键词 selective laser melting 3D printing Mesoscopic simulation - Thermodynamics DENSIFICATION POROSITY
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Effect of TiO_2 surface properties on the SCR activity of NOx emission abatement catalyst 被引量:4
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作者 YEDai-qi TIANLiu-qing LIANGHong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2002年第4期530-535,共6页
NOx emission abatement catalysts V 2O 5 supported on various TiO 2 including anatase, rutile and mixture of both were investigated with various physico\|chemical measurements such as BET, NH\-3\|TPD, NARP, XRD and ... NOx emission abatement catalysts V 2O 5 supported on various TiO 2 including anatase, rutile and mixture of both were investigated with various physico\|chemical measurements such as BET, NH\-3\|TPD, NARP, XRD and so on, and the effect of TiO\-2 surface properties on the SCR(selective catalytic reduction) activity of V\-2O\-5/TiO\-2 catalysts was studied. It was found that the TiO\-2 surface properties had strong affect on the SCR activity of V\-2O\-5/TiO\-2 catalysts. The stronger acidic property resulted in the higher exposure of active sites as well as the higher SCR activity. 展开更多
关键词 NOx SCR(selective catalytic reduction) surface acidity V\-2O\-5/TiO\-2 catalyst
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有限多个集值映象公共不动点的修正的Mann迭代程序
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作者 金燕群 曾六川 《上海师范大学学报(自然科学版)》 2008年第2期131-136,共6页
研究用于寻求有限多个集值似Φ-伪压缩映象公共不动点的修正的Mann迭代程序.在似广义Lipschitzian条件下证明了分别在Hilbert空间与一致光滑Banach空间中由修正的Mann迭代程序生成的序列强收敛到这有限多个集值似Φ-伪压缩映象唯一的公... 研究用于寻求有限多个集值似Φ-伪压缩映象公共不动点的修正的Mann迭代程序.在似广义Lipschitzian条件下证明了分别在Hilbert空间与一致光滑Banach空间中由修正的Mann迭代程序生成的序列强收敛到这有限多个集值似Φ-伪压缩映象唯一的公共不动点. 展开更多
关键词 修正的Mann迭代程序 集值似Ф-伪压缩映象 公共不动点 似广义lipschitzian条件 强收敛性
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