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Nuclear translocation of OsMADS25 facilitated by OsNAR2.1 in reponse to nitrate signals promotes rice root growth by targeting OsMADS27 and OsARF7

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Plant Communications 2023年第6期4卷 329-341页

作者： Junyu Wu Shuaiqi Yang Nana Chen qining jiang Linli Huang Jiaxuan Qi Guohua Xu Lisha Shen Hao Yu Xiaorong Fan Yinbo Gan Zhejiang Key Laboratory of Crop Germplasm Department of AgronomyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310000China State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural UniversityNanjing 210095China Temasek Life Sciences Laboratory and Department of Biological Sciences National University of Singapore1 Research LinkSingapore 117604Singapore

Nitrate is an important nitrogen source and signaling molecule that regulates plant growth and *** several components of the nitrate signaling pathway have been identified,the detailed mechanisms are still *** previous results showed that OsMADS25 can regulate root development in response to nitrate signals,but the mechanism is still ***,we try to answer two key questions:how does OsMADS25 move from the cytoplasm to the nucleus,and what are the direct target genes activated by OsMADS25 to regulate root growth after it moves to the nucleus in response to nitrate?Our results demonstrated that OsMADS25 moves from the cytoplasm to the nucleus in the presence of nitrate in an *** immunoprecipitation sequencing,chromatin immunoprecipitation qPCR,yeast one-hybrid,and luciferase experiments showed that OsMADS25 directly activates the expression of OsMADS27 and OsARF7,which are reported to be associated with root ***,OsMADS25-RNAi lines,the Osnar2.1 mutant,and OsMADS25-RNAi Osnar2.1 lines exhibited significantly reduced root growth compared with the wild type in response to nitrate supply,and expression of OsMADS27 and OsARF7 was significantly suppressed in these ***,these results reveal a new mechanismby which OsMADS25 interacts with *** interaction is required for nuclear accumulation of OsMADS25,which promotes OsMADS27 and OsARF7 expression and root growth in a nitratedependent manner.

关键词： OsMADS25 OsNAR2.1 OsMADS27 OsARF7 nitrate signaling rice root

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《献给爱米丽的一朵玫瑰花》中的空间叙事

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绥化学院学报 2021年第11期41卷 64-67页

作者：姜棋苧刘宇长春工业大学外国语学院吉林长春130000

在《献给爱米丽的一朵玫瑰花》中,威廉·福克纳讲述了一个贵族女子爱米丽的悲惨生活。她的家庭在美国内战后逐渐衰落。作者摒弃了传统小说对叙事时间的使用,有意选择用空间来表达时间,用空间来推动整个叙事过程,甚至用空间来表现人物的... 详细信息

在《献给爱米丽的一朵玫瑰花》中,威廉·福克纳讲述了一个贵族女子爱米丽的悲惨生活。她的家庭在美国内战后逐渐衰落。作者摒弃了传统小说对叙事时间的使用,有意选择用空间来表达时间,用空间来推动整个叙事过程,甚至用空间来表现人物的价值。在展现其高超的叙事手法和情节描写的同时,作者也通过对时间和空间的把握建构出了小说的思想内涵和艺术价值。

关键词：《献给爱米丽的一朵玫瑰花》空间叙事空间变异流言身份

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The Effects of WC on the Microstructures and Wear Resistance of FeCoCrNiB_(0.2) High Entropy Alloy

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Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 416-422页

作者： BAO Yefeng GUO Linpo ZHONG Chonghui XIE Bingqi WANG Zirui SONG qining jiang Yongfeng College of Mechanical and Electrical Engineering Hohai UniversityChangzhou213022China Zhejiang Sanhua Automotive Components Co. LtdHangzhou310018China

To improve the wear resistance of the FeCoCrNiB_(0.2)high entropy alloy(HEA),the FeCoCrNiB_(0.2)(WC_(0))and FeCoCrNiB_(0.2)+20wt%WC(WC_(20))HEA coatings were prepared on Q235 steel by laser cladding(LC).The microstructure,hardness,and tribometer of the HEA coatings were investigated using scanning electron microscopy with spectroscopy(SEM/EDS),X-ray diffraction(XRD),vickers microhardness tester,and pin-on-disc tribometer,*** experimental results show that the WC0HEA coating comprises a simple BCC phase mixed with an M_(2)B *** 20wt%WC,the WC_(20)HEA coating is composed of a simple BCC phase mixed with the Cr_(23)C_(6)carbide *** microstructure of the WC_(20)HEA coating is simple,which consists of equiaxed grain and *** microhardness also increases from 625.5HV to 806.0HV,and the wear mass loss correspondingly decreases from 30.9 to 14.9 mg.W and C atoms formed by WC dissolution are mainly dissolved in the BCC phase,which leads to the solution strengthening ***,Cr_(23)C_(6)carbides inhibit the growth of the grains,play the role of fine-grain strengthening,and further improve the hardness and wear resistance of the HEA coating.

关键词： high-entropy alloys laser processing and cladding microstructures hardness wear-resistance

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Microstructure and Wear Resistance of Fe_(4)CoCrNiB_(0.2)Mo_(x)(x=0,0.5,1) High Entropy Alloys

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Journal of Wuhan University of Technology(Materials Science) 2022年第2期37卷 261-269页

作者： BAO Yefeng GUO Linpo ZHONG Chonghui SONG qining YANG Ke jiang Yongfeng WANG Zirui College of Mechanical and Electrical Engineering Hohai UniversityChangzhou 213002China

To improve the wear resistance of Fe_(4)CoCrNiB_(0.2) high-entropy alloy(HEA),the Fe_(4)CoCrNiB_(0.2)Mo_(x)(where,x in Fe_(4)CoCrNiB_(0.2)Mo_(x) is a molar content,and the value is 0,0.5,1,respectively)HEAs were prepared on the Q235 substrate by laser *** structure,hardness,and wear resistance of Fe_(4)CoCrNiB_(0.2)Mo_(x) HEAs were investigated using scanning electron microscopy with spectroscopy(SEM/EDS),X-ray diffraction(XRD),Vickers microhardness tester,and pin-on-disc *** influences of Mo content on the phase structures and mechanical properties of Fe_(4)CoCrNiB_(0.2)Mo_(x) HEAs are *** experimental results show that the Fe_(4)CoCrNiB_(0.2)Mo_(x) HEA cladding layers are composed of a simple BCC phase mixed with M_(2)B phase,BCC phase,and BCC+FCC dual-phase,*** wear resistance and hardness of the Fe_(4)CoCrNiB_(0.2)Mo HEA sample are 2 and 1.35 times those of the Fe_(4)CoCrNiB_(0.2) HEA sample,*** microhardness and wear resistance of the Fe_(4)CoCrNiB_(0.2)Mo_(x) HEAs increase with the increase of Mo *** is found that the Fe_(4)CoCrNiB_(0.2)Mo_(x) HEA cladding layers are mainly strengthened by the solid solution strengthening and fine-grained strengthening.

关键词： SEM XRD high-entropy alloys laser cladding

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Study on prediction model of cavitation erosion incubation period of duplex stainless steel surfacing layer in a benign medium

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Acta Mechanica Sinica 2022年第8期38卷 112-121页

作者： Yefeng Bao Chong Cao Bingqi Xie qining Song Yongfeng jiang Nan Xu College of Mechanical and Electrical Engineering Hohai UniversityChangzhou213022China Fujian Fuqing Nuclear power Co. LtdFuqing350300China

In order to estimate the cavitation incubation period of duplex stainless steel(DSS)under ultrasonic cavitation erosion(CE),this paper analyzed the loading process of material during ultrasonic *** strain theory,cumulative damage theory,and Bernoulli probability model were used to derive the minimum number of cavitation impacts required for the initiation of fatigue cracks,and the predictive equation of the material cavitation incubation period was *** was obtained by tungsten inert gas welding(TIG)powder surfacing *** test and ultrasonic CE test were performed,and the tensile test data were used to calculate the cavitation incubation period by using the predictive *** to the possible presence of precipitates and micro-cracks in the sample,there was an error between the calculated and the test *** results showed that the max error between the calculated results and the test results was 8.1%,and the errors of the remaining two groups were within 3.5%.

关键词： Duplex stainless steel Ultrasonic cavitation erosion Incubation period Calculation Tensile properties

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敏化处理对2209双相不锈钢堆焊层点蚀行为的影响

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焊接学报 2020年第2期41卷 33-38,I0002,I0003页

作者：柳昱包晔峰宋亓宁蒋永锋河海大学常州213000 河海大学疏浚技术教育部工程研究中心常州213000

在850℃下,对2209双相不锈钢堆焊试样进行不同时间(15 min,30 min,1 h,2 h)的敏化处理.通过浸泡试验和交流阻抗试验研究了敏化时间对2209双相不锈钢堆焊层耐点蚀性能的影响.结果表明,对于不同时间敏化处理的试样,点蚀均起源于铁素体相;... 详细信息

在850℃下,对2209双相不锈钢堆焊试样进行不同时间(15 min,30 min,1 h,2 h)的敏化处理.通过浸泡试验和交流阻抗试验研究了敏化时间对2209双相不锈钢堆焊层耐点蚀性能的影响.结果表明,对于不同时间敏化处理的试样,点蚀均起源于铁素体相;点蚀速率与敏化时间相关,敏化处理时间小于30 min时,堆焊层的点蚀失重不明显,当敏化时间大于30 min时,点蚀失重量明显上升.阻抗谱结果显示容抗弧曲率半径随着敏化时间的增加呈不断减小的趋势,说明钝化膜的稳定性下降,耐点蚀性能下降,与浸泡试验的结果吻合.

关键词： 2209双相锈钢堆焊层敏化处理点蚀

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高熵合金FeCoCrNiB_(0.2)Mo_(x)激光熔覆层抗冲蚀性能

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焊接学报 2021年第5期42卷 7-13,I0001,I0002页

作者：包晔峰谢秉錡宋亓宁蒋永锋河海大学常州213022

为改善钢材表面耐冲蚀性能,采用激光熔覆的方法在Q235基体上制备了高熵合金FeCoCrNiB_(0.2)Mo_(x)(x=0,0.5,1)涂层,使用光学显微镜观察了熔覆层的组织;利用X射线衍射仪分析了合金熔覆层的相组成以及晶格畸变;使用维氏硬度计和自制冲蚀设... 详细信息

为改善钢材表面耐冲蚀性能,采用激光熔覆的方法在Q235基体上制备了高熵合金FeCoCrNiB_(0.2)Mo_(x)(x=0,0.5,1)涂层,使用光学显微镜观察了熔覆层的组织;利用X射线衍射仪分析了合金熔覆层的相组成以及晶格畸变;使用维氏硬度计和自制冲蚀设备,研究了Mo对熔覆层硬度和耐冲蚀性能的影响.结果表明:FeCoCrNiB_(0.2)Mo_(x)熔覆层由树枝晶组成,层间还可以观察到细晶区;由于激光熔覆较快的冷却速率抑制了金属间化合物的析出,高熵合金FeCoCrNiB_(0.2)Mo_(x)激光熔覆层完全由单相BCC固溶体组成;FeCoCrNiB_(0.2)Mo_(x)激光熔覆层硬度可达600 HV0.2以上;熔覆层耐冲蚀性能优良,冲蚀失重速率小于2.25×10^(−4) g/h;并且随着Mo元素含量的增加,涂层的晶格畸变增加,固溶强化效果更加显著,使得熔覆层硬度上升,因此FeCoCrNiB_(0.2)Mo_(x)熔覆层的抗冲蚀性能上升;FeCoCrNiB_(0.2)Mo_(x)系列涂层的冲蚀破坏主要以塑性微切削和锻压挤压为主.

关键词：金属材料高熵合金激光熔覆冲蚀

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钛合金表面阳极微弧等离子体渗硼层的研究

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材料导报 2018年第18期32卷 3161-3165页

作者：缪倩倩陈海燕顾伟蒋永锋宋亓宁河海大学机电工程学院常州213022

采用阳极微弧等离子体技术研究了钛合金表面渗硼层的微观组织和性能。通过光学显微镜、扫描电镜(SEM)、X射线衍射仪(XRD)、能谱仪(EDS)表征分析了渗硼层的表面和截面的微观组织、形貌、相结构、渗层元素分布。借助摩擦磨损试验机测试了... 详细信息

采用阳极微弧等离子体技术研究了钛合金表面渗硼层的微观组织和性能。通过光学显微镜、扫描电镜(SEM)、X射线衍射仪(XRD)、能谱仪(EDS)表征分析了渗硼层的表面和截面的微观组织、形貌、相结构、渗层元素分布。借助摩擦磨损试验机测试了渗硼层的耐磨性,运用电化学工作站对渗硼后的TC4材料进行了耐腐蚀性测试。结果表明,钛合金表面阳极微弧等离子体渗硼技术制备的渗硼层连续致密。渗硼层主要由金属间化合物TiB2和TiB组成,其与氧化层共同作用,能显著提高钛合金表面的耐磨性。渗硼后的TC4钛合金耐腐蚀性较基体有所降低。表面阳极微弧等离子体技术是一种新型的钛合金表面改性方法。

关键词：钛合金渗硼显微组织耐磨性

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Experimental Study of Venous Return in Minute tissue Flaps

Experimental Study of Venous Return in Minute tissue Flaps

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第二十一届全国中西医结合骨伤科学术研讨会暨骨伤科分会换届大会

作者： Xing JngFeng Shi TieJun Zhao Wei Chen Zhong Cao Yang Lin Ping jiang DanSheng Wang ZhiMin Yang qining The First Affiliated Hospital of Zhejiang Chinese Medical University Central Hospital of JinHua The First Affiliated Hospital of Medical School of Zhejiang University

ObjectiveTo establishthe experimentalmodel ofminutetissueflapsinliving SDrats,andto discuss the mechanism of venous *** The experimental model of minute tissue flaps(1.0 cm×1.0 cm)was established by dissecting 30 living SD *** rats were randomized into 2 groups.30 skin flaps from the posterior limbs ofthe rats were in each group,and the method of homobody control was *** group 1,the arteria saphena and the accompanying veins in the skin flaps were retained,while other vessels were *** group 2,the arteria saphena in the skin flaps were retained,while the veins accompanying the arteria saphena and all superficial veins in the skin flaps were *** viability,texture and elasticity of the skin flaps were observed;at the same time the reestablishment of venous return was observed via *** Engorgement of the skin flaps:The different engorgement conditions ofthe tissue flaps in the two groups on the 1st and 2nd days after the operation were significant,with statistics showing P*** of the skin flaps:In group 1,the skin color of the tissue flaps was normal,and the viability,texture andelasticity of the tissue flaps were also good except for one case in which there was blackened and degenerated skin in the area 0.1 cm proximal to the *** group 2,there were 5 cases with blackened and degenerated skin in the area 0.1 cm proximal to the periphery3 of which liquefied and completely *** rest had normal skin and no engorgement,but they were poor in texture and *** statistics showed P>0.05,indicating there were no significant *** Minute tissue flap grafting,different from general tissue flap grafting,has a comparatively high viability rate under the conditions of normal arterial anastomosis and failed venous anastomosis from various ***,successful arterial and venous anastomoses are necessary to achiev

关键词： Model of skin flap surgical skin flap Minute tissue flap Reconstruction of venous return Rats

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基于随机森林算法的气动软体机械臂视觉伺服

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重庆大学学报 2023年第9期46卷 33-40页

作者：陈元杰赵翰宇何启宁陈彦希彭江江沛重庆大学机械与运载工程学院重庆400044 重庆城投城市更新建设发展有限公司重庆400025 重庆工业职业技术学院重庆401120 中煤科工重庆设计研究院(集团)有限公司重庆400042

软体机械臂具有灵活性和柔顺性的特点,可在实现对位姿跟踪的同时确保与环境交互的安全性,近年成为研究的热点。但由于软体机械臂材料变形是非线性的,其运动学建模的参数众多且难以获得准确值,使软体机械臂实现运动学控制较为困难。为了... 详细信息

软体机械臂具有灵活性和柔顺性的特点,可在实现对位姿跟踪的同时确保与环境交互的安全性,近年成为研究的热点。但由于软体机械臂材料变形是非线性的,其运动学建模的参数众多且难以获得准确值,使软体机械臂实现运动学控制较为困难。为了补偿软体机械臂的不确定性,在现在视觉伺服的基础上,提出一种基于历史数据驱动的手眼视觉伺服新方法。该方法结合基于随机森林算法的控制器来完成机械臂控制任务,通过对历史数据聚类,基于随机森林回归模型建立软体机械臂驱动状态和末端图像特征的逆映射,无须求解机械臂和摄像机的任何参数,即可快速获取系统输入变量。实验结果表明,所提出的方法可以较好地实现预期控制目标。

关键词：软体机械臂控制视觉伺服随机森林

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