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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 388-388页

作者： li Hu mingao li Qiang Chen Tao Zhou Laixin Shi Mingbo Yang College of Material Science and Engineering Chongqing University of TechnologyChongqing400054China Southwest Technology and Engineering Research Institute Chongqing400039China

In the originally published PDF version of the article,a reference citation[34]has been omitted in the caption of Fig.6.The added reference No.34 is“L.Hu,H.Lv,L.Shi,Y.Chen,Q.Chen,T.Zhou,M.li,M.Yang,J.Magnes.Alloy.10,... 详细信息

关键词： Microstructure Alloy AZ31

GSW3.1,a novel gene controlling grain size and weight in rice

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The Crop Journal 2024年第3期12卷 796-802页

作者： Yifei Jiang mingao Zhou Simin Ke Xiaoxiao Deng Yangsheng li State Key Laboratory of Hybrid Rice Key Laboratory for Research and Utilization of Heterosis in Indica RiceMinistry of AgricultureCollege of Life SciencesWuhan UniversityWuhan 430072HubeiChina

Grain size and weight are closely related traits determining yield in rice(Oryza sativa L.).Since indica and japonica rice varieties differ significantly in multiple traits,a high-generation recombinant inbred line(RIL)population derived from the crossing LH9(indica)and RPY(japonica)was used to map grainrelated traits in six environments.Pyramiding of the quantitative trait loci(QTL)for thousand-grain weight showed that combinations of multiple QTL significantly increased the phenotypic effect.A novel gene named GSW3.1 controlling grain size and weight was discovered using the major QTL for the colocalization of grain width and thousand-grain weight on chromosome 3.Gene editing revealed that GSW3.1(LOC_Os03g16850)was pleiotropic,positively regulating grain size and weight while affecting several other agronomic traits.Haplotype analysis indicated that some traits,including grain width and weight,were highly correlated with indica-japonica differentiation.

关键词： Rice Grain size and weight 3.1(GSW3.1) Quantitative trait locus Haplotype analysis

Dependence of Microstructure Evolution and Mechanical Properties on Loading Direction for AZ31 Magnesium Alloy Sheet with Non-basal Texture During In-Plane Uniaxial Tension

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 223-234页

作者： li Hu mingao li Qiang Chen Tao Zhou Laixin Shi Mingbo Yang College of Material Science and Engineering Chongqing University of TechnologyChongqing 400054China Southwest Technology and Engineering Research Institute Chongqing 400039China

In-plane uniaxial tension of AZ31 magnesium alloy sheet with non-basal texture has been conducted in order to demonstrate the effects of loading direction on the microstructure evolution and mechanical properties at ambient temperature.Loading axes are chosen to be along five directions distributed between rolling direction(RD)and transverse direction(TD),allowing various activities in involved slip and twinning modes to take place.As for twinning modes,electron backscattered diffraction observations confirm that the contribution of{1011}compression twinning is minimal to the plastic deformation of all deformed samples.By comparison,{1012}extension twinning(ET)not only serves as an important carrier on sustaining and accommodating plastic strain but also contributes to the emergence of TD-component texture with the progression of plastic strain.In terms of slip modes,analysis on Schmid factor demonstrates that the increasing tilted angle between loading direction and RD of sheet is unfavorable to the activation of basalslip,whereas it contributes to the activation of prismaticslip.These observations consequently explain the increasing tendency of 0.2%proof yield stress.Moreover,the activations of basalslip and{1012}ET collectively contribute to the concentration of two tilted basal poles toward normal direction.With increasing angle between loading direction and RD,the activations of basalslip and{1012}ET are gradually weakened.This leads to a weakening tendency about concentration of two tilted basal poles,a generally increasing tendency about Lankford value(r-value)and a generally decreasing tendency about strain-hardening exponent(n-value).

关键词： AZ31 magnesium alloy Non-basal texture Plastic deformation Microstructure evolution

Study on hot deformation behavior of homogenized Mg-8.5Gd-4.5Y-0.8Zn-0.4Zr alloy using a combination of strain-compensated Arrhenius constitutive model and finite element simulation method

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Journal of Magnesium and Alloys 2023年第3期11卷 1016-1028页

作者： li Hu Mengwei Lang Laixin Shi mingao li Tao Zhou Chengli Bao Mingbo Yang College of Material Science and Engineering Chongqing University of TechnologyChongqing 400054China

Isothermal hot compression experiments were conducted on homogenized Mg-8.5Gd-4.5Y-0.8Zn-0.4Zr alloy to investigate hot deformation behavior at the temperature range of 673-773 K and the strain rate range of 0.001-1 s^(-1)by using a Gleeble-1500D thermo mechanical simulator.Metallographic characterization on samples deformed to true strain of 0.70 illustrates the occurrence of flow localization and/or microcrack at deformation conditions of 673 K/0.01 s^(-1),673 K/1 s^(-1)and 698 K/1 s^(-1),indicating that these three deformation conditions should be excluded during hot working of homogenized Mg-8.5Gd-4.5Y-0.8Zn-0.4Zr alloy.Based on the measured true stress-strain data,the strain-compensated Arrhenius constitutive model was constructed and then incorporated into UHARD subroutine of ABAQUS software to study hot deformation process of homogenized Mg-8.5Gd-4.5Y-0.8Zn-0.4Zr alloy.By comparison with measured force-displacement curves,the predicted results can describe well the rheological behavior of homogenized Mg-8.5Gd-4.5Y-0.8Zn-0.4Zr alloy,verifying the validity of finite element simulation of hot compression process with this complicated constitutive model.Numerical results demonstrate that the distribution of values of material parameters(α,n,Q and ln A)within deformed sample is inhomogeneous.This issue is directly correlated to the uneven distribution of equivalent plastic strain due to the friction effect.Moreover,at a given temperature the increase of strain rate would result in the decrease of equivalent plastic strain within the central region of deformed sample,which hinders the occurrence of dynamic recrystallization(DRX).

关键词： Mg-RE-Zn alloy Hot deformation Microstructure evolution Constitutive model Finite element simulation

Research on deformation mechanism of AZ31 magnesium alloy sheet with non-basal texture during uniaxial tension at room temperature:A visco-plastic self-consistent analysis

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Journal of Magnesium and Alloys 2022年第7期10卷 1994-2008页

作者： li Hu Huyuan Lv Laixin Shi Yu Chen Qiang Chen Tao Zhou mingao li Mingbo Yang College of Material Science and Engineering Chongqing University of TechnologyChongqing 400054China Southwest Technology and Engineering Research Institute Chongqing 400039China

The relationship between activities of involved deformation mechanisms and the evolution of microstructure and texture during uniaxial tension of AZ31 magnesium alloy with a rare non-basal texture has been thoroughly investigated in the present study by means of electron backscattered diffraction(EBSD) measurement and visco-plastic self-consistent(VPSC) modeling. These results show that except basal slip and prismatic slip, {10■2} extension twin(ET) also plays a significant role during plastic deformation. With the increasing tilted angle between loading direction and rolling direction(RD) of sheet, the activity of {10■2} ET possesses a decreasing tendency and its role in plastic deformation changes from the one mainly sustaining plastic strain to the one mainly accommodating local strain between individual grains. When {10■2} ET serves as a carrier of plastic strain, it mainly results in the formation of basal texture component(c-axis//ND, normal direction). By comparison, when the role of {10■2} ET is to accommodate local strain, it mainly brings about the formation of prismatic texture component(c-axis//TD, transverse direction). At large plastic deformation, the competition between basal slip and pyramidal slip is responsible for the concentration of tilted basal poles towards ND within all deformed samples. The larger difference is between the activities of basal slip and pyramidal slip, the smaller separation is between these two tilted basal poles. Besides,VPSC modeling overesttmates volume fractions of {10■2} ET in samples with angle of 0 to 30° between loading direction and RD of sheet because interactions between twin variants are not included in VPSC modeling procedure at the present form. In addition, as compatible deformation between individual grains cannot be considered in VPSC modeling, the predicted volume fractions of {10■2} ET in samples with angle of 45 to 90° between loading direction and RD of sheet are smaller than the correspondingly measured results.

关键词： AZ31 magnesium alloy Non-basal texture Plastic deformation VPSC

Influence of bimodal non-basal texture on microstructure characteristics,texture evolution and deformation mechanisms of AZ31 magnesium alloy sheet rolled at liquid-nitrogen temperature

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镁合金学报(英文) 2023年第7期11卷 2600-2609页

作者： Shouzuo Zhang li Hu Yutao Ruan Tao Zhou Qiang Chen Yang Zhong Laixin Shi mingao li Mingbo Yang Shuyong Jiang College of Material Science and Engineering Chongqing University of TechnologyChongqing 400054China Southwest Technology and Engineering Research Institute Chongqing 400039China School of Advanced Manufacturing Technologies Tomsk Polytechnic UniversityTomsk 634050Russia College of Material Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

Cryogenic rolling experiments have been conducted on the AZ31 magnesium(Mg)alloy sheet with bimodal non-basal texture,which is fabricated via the newly developed equal channel angular rolling and continuous bending process with subsequent annealing(ECAR-CB-A)process.Results demonstrate that this sheet shows no edge cracks until the accumulated thickness reduction reaches about 18.5%,which is about 105.6%larger than that of the sheet with traditional basal texture.Characterization experiments including optical microstructure(OM),X-ray diffractometer(XRD),and electron backscatter diffraction(EBSD)measurements are then performed to explore the microstructure characteristics,texture evolution and deformation mechanisms during cryogenic rolling.Experimental observations confirm the occurrence of abundant{10–12}extension twins(ETs),twin-twin interactions among{10–12}ET variants and{10–12}-{10–12}double twins(DTs).The twinning behaviors as for{10–12}ETs are responsible for the concentration of c-axes of grains towards normal direction(ND)and the formation of transverse direction(TD)-component texture at the beginning of cryogenic rolling.The twinning behaviors with respect to{10–12}-{10–12}DTs are responsible for the disappearance of TD-component texture at the later stage of cryogenic rolling.The involved deformation mechanisms can be summarized as follows:Firstly{10–12}ETs dominate the plastic deformation.Subsequently,dislocation slip,especially basalslip,starts to sustain more plastic strain,while{10–12}ETs occur more frequently and enlarge continuously,resulting in the formation of twin-twin interaction among{10–12}ET variants.With the increasing rolling passes,{10–12}-{10–12}DTs incorporate in the plastic deformation and dislocation slip serves as the major one to sustain plastic strain.The activities of basalslip,{10–12}ETs and{10–12}-{10–12}DTs benefit in accommodating the plastic strain in sheet thickness,which contributes to the improved rolling formability in AZ31 Mg alloy sheet with bimodal non-basal te

关键词： AZ31 Mg alloy Bimodal non-basal texture Cryogenic rolling Microstructure evolution Deformation mechanism

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油用玫瑰研究进展

植物遗传资源学报 2024年第5期25卷 777-789页

作者：张磊寇亚平段铭奥王晓飞贾瑞冬赵鑫李秋香葛红杨树华中国农业科学院蔬菜花卉研究所/农业农村部花卉生物学与种质创制重点实验室(北方) 北京100081

油用玫瑰栽培应用历史悠久,是全球重要的木本香料资源和药食同源植物,从其花瓣中提取的玫瑰精油作为重要的香料原料已广泛应用于日化、医药和食品行业。玫瑰精油的品质主要受玫瑰的品种类型、产地条件和提取工艺等综合因素的影响。我国... 详细信息

油用玫瑰栽培应用历史悠久,是全球重要的木本香料资源和药食同源植物,从其花瓣中提取的玫瑰精油作为重要的香料原料已广泛应用于日化、医药和食品行业。玫瑰精油的品质主要受玫瑰的品种类型、产地条件和提取工艺等综合因素的影响。我国油用玫瑰资源非常丰富,但玫瑰精油的深加工技术起步较晚,针对我国栽培油用玫瑰资源特性及玫瑰精油的应用现状还鲜有归纳,本文对油用玫瑰的主要栽培类型和现状,玫瑰精油提取技术、相关行业标准、化学成分及功能活性进行了系统的归纳总结,并从油用玫瑰资源的挖掘与利用、精油提取技术研发与优化、精油相关标准的完善、产品应用领域的拓展和功能活性评价体系的建立等方面提出参考建议,以期为我国玫瑰产业的发展提供参考,为我国蔷薇属植物资源的创新利用提供理论指导。

关键词：油用玫瑰玫瑰精油提取技术化学成分功能活性

Over 18% binary organic solar cells enabled by isomerization of non-fullerene acceptors with alkylthiophene side chains

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Science China Chemistry 2022年第9期65卷 1758-1766页

作者： Ao Shang Siwei Luo Jianquan Zhang Heng Zhao Xinxin Xia mingao Pan Chao li Yuzhong Chen Jicheng Yi Xinhui Lu Wei Ma He Yan Huawei Hu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Department of Chemistry Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsEnergy Institute and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionHong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Department of Physics Chinese University of Hong KongNew TerritoriesHong Kong 999077China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

Side-chain engineering has been demonstrated as an effective method for fine-tuning the optical,electrical,and morphological properties of organic semiconductors toward efficient organic solar cells(OSCs).In this work,three isomeric non-fullerene small molecule acceptors(SMAs),named as BTP-4F-T2C8,BTP-4F-T2EH and BTP-4F-T3EH,with linear and branched alkyl chains substituted on the α or β positions of thiophene as the side chains,were synthesized and systematically investigated.The results demonstrate that the size and substitution position of alkyl side chains can greatly affect the electronic properties,molecular packing as well as crystallinity of the SMAs.After blending with donor polymer D18-Cl,the prominent device performance of 18.25% was achieved by the BTP-4F-T3EH-based solar cells,which is higher than those of the BTP-4F-T2EH-based(17.41%)and BTP-4F-T2C8-based(15.92%)ones.The enhanced performance of the BTP-4F-T3EH-based devices is attributed to its stronger crystallinity,higher electron mobility,suppressed bimolecular recombination,and the appropriate intermolecular interaction with the donor polymer.This work reveals that the side chain isomerization strategy can be a practical way in tuning the molecular packing and blend morphology for improving the performance of organic solar cells.

关键词： organic solar cells non-fullerene acceptors side chain isomerization morphology intermolecular interaction

基于卷积神经网络的侵入性酿酒酵母感染疾病的检测方法

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中国科学：生命科学 2023年第3期53卷 408-416页

作者：李帅杜旻杲刘飞李恭新江南大学物联网工程学院轻工过程先进控制教育部重点实验室无锡214122 中国科学院沈阳自动化研究所机器人学国家重点实验室沈阳110016

酿酒酵母(Saccharomyces cerevisiae)是常用于烘焙和酿造行业的发酵菌种,也作为益生菌用于预防和治疗各种腹泻及其相关疾病.然而,近二十年来,由于摄入酿酒酵母产生的侵入性酿酒酵母感染的病例一直在不断增加,特别是在老年人、免疫功能... 详细信息

酿酒酵母(Saccharomyces cerevisiae)是常用于烘焙和酿造行业的发酵菌种,也作为益生菌用于预防和治疗各种腹泻及其相关疾病.然而,近二十年来,由于摄入酿酒酵母产生的侵入性酿酒酵母感染的病例一直在不断增加,特别是在老年人、免疫功能低下和危重患者群体中.此外,目前临床上所用酿酒酵母侵入性感染疾病的诊断方法耗时较长,而容易错过最佳的诊断时间和难以实现早期预防.本文提出了一种基于卷积神经网络的目标检测的方法用于对血液中的酿酒酵母细胞进行检测和识别,以达到侵入性酿酒酵母疾病诊断的目的.该方法是基于以ResNet-50网络结构作为特征提取网络构建的SSD算法.以实际采集的血液和酿酒酵母细胞混合液的样本图像作为算法的训练和测试数据,实验结果表明该方法的识别准确率可达到97.70%,检测时间为0.31 s.并且通过与相似的其他3种卷积神经网络算法的测试对比,结果表明该算法识别准确率也有着明显的优势.该论文通过实验验证了,基于卷积神经网络的目标检测方法有望作为侵入性酿酒酵母感染疾病检测和诊断的一种新方法;且该方法检测准确率高和时间短的优势有望实现侵入性酿酒酵母感染疾病的早期预防和及时诊断.

关键词：侵入性酿酒酵母感染卷积神经网络 ResNet-50 SSD算法目标检测

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南丰刘壎著述编刻及著录问题辨正

南昌师范学院学报 2024年第1期45卷 82-88页

作者：李博郑州大学文学院河南郑州450001

宋遗民刘壎(1240—1319)的著述在元代皆以抄本行世,明正德间,同邑后辈符遂首次付刻,其后再次散乱,经明末刘氏裔孙冠寰搜讨,合刊为《水云村泯稿》。清初,其子刘凝等逐渐将《吟稿》《泯稿》《隐居通议》独立,后两种于乾隆年间入《四库全... 详细信息

宋遗民刘壎(1240—1319)的著述在元代皆以抄本行世,明正德间,同邑后辈符遂首次付刻,其后再次散乱,经明末刘氏裔孙冠寰搜讨,合刊为《水云村泯稿》。清初,其子刘凝等逐渐将《吟稿》《泯稿》《隐居通议》独立,后两种于乾隆年间入《四库全书》。嘉、道年间,刘烒、斯嵋父子继续校勘重刻,传世至今。经过自元至清的几次校刻,刘氏著述在编辑形式、文本面貌上均有较大变动。另外,相关目录书著录及研究也存在一些问题,并附辨正。

关键词：刘壎水云村泯稿水云村吟稿隐居通议编刻