检索结果-南通市图书馆

Carotenoid isomerase regulates rice tillering and grain productivity by its biosynthesis pathway

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第2期66卷 172-175页

作者： Chaoqing Ding Zhengji Shao Yuping Yan Guangheng Zhang Dali Zeng Li Zhu Jiang Hu Zhenyu Gao guojun dong Qian Qian Deyong Ren State Key Laboratory of Rice Biology and Breeding ChinaNational Rice Research InstituteHangzhou 310006China

Tillers are unique inflorescence-like branches in grasses,and their number determines the panicle number,plant architecture,and yield(Shang et al.,2021).Tiller formation mainly undergoes axillary meristem(AM)initiation and tiller bud outgrowth(Wang et al.,2018;Yan et al.,2023).The rice(Oryza sativa)KNOX gene OSH1 is expressed in AMs,and an osh1 mutant produces fewer tillers(Tanaka et al.,2015).

关键词： sativa Oryza panicle

Leaf Morphology Genes SRL1 and RENL1 Co-Regulate Cellulose Synthesis and Affect Rice Drought Tolerance

在线全文

学校读者我要写书评

暂无评论

Rice science 2024年第1期31卷 103-117,I0020-I0022页

作者： LIU Dan ZHAO Huibo WANG Zi’an XU Jing LIU Yiting WANG Jiajia CHEN Minmin LIU Xiong ZHANG Zhihai CEN Jiangsu ZHU Li HU Jiang REN Deyong GAO Zhenyu dong guojun ZHANG Qiang SHEN Lan LI Qing QIAN Qian HU Songping ZHANG Guangheng State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006China Research Center of Plant Functional Genes and Tissue Culture Technology College of Bioscience and BioengineeringJiangxi Agricultural UniversityNanchang 330045China Qian Qian Academician Workstation National Nanfan Research Institute(Sanya)Chinese Academy of Agricultural SciencesSanya 572024China

The morphological development of rice(Oryza sativa L.)leaves is closely related to plant architecture,physiological activities,and ***,it is unclear whether there is a co-regulatory relationship between the morphological development of leaves and adaptation to drought *** this study,a drought-sensitive,roll-enhanced,and narrow-leaf mutant(renl1)was induced from a semi-rolled leaf mutant(srl1)by ethyl methane sulfonate(EMS),which was obtained from Nipponbare(NPB)through ***-based cloning and functional validation showed that RENL1 encodes a cellulose synthase,allelic to NRL1/*** RENL1 mutation resulted in reduced vascular bundles,vesicular cells,cellulose,and hemicellulose contents in cell walls,diminishing the water-holding capacity of *** addition,the root system of the renl1 mutant was poorly developed and its ability to scavenge reactive oxygen species(ROS)was decreased,leading to an increase in ROS after drought ***,genetic results showed that RENL1 and SRL1 synergistically regulated cell wall *** results revealed a theoretical basis for further elucidating the molecular regulation mechanism of cellulose on rice drought tolerance,and provided a new genetic resource for enhancing the synergistic regulation network of plant type and stress resistance,thereby realizing simultaneous improvement of multiple traits in rice.

关键词： cellulose cell wall drought tolerance leaf morphology rice

多种能场高性能加工复杂曲面关键技术研究进展

在线全文

学校读者我要写书评

暂无评论

机械工程学报 2024年第9期60卷 152-167页

作者：吴淑晶王大中谷顾全黄帅董国军郭国强安庆龙李长河上海工程技术大学机械与汽车工程学院上海201620 哈尔滨工业大学机电工程学院哈尔滨150001 上海航天精密机械研究所上海201600 上海交通大学机械与动力工程学院上海200240 青岛理工大学机械与汽车工程学院青岛266520

综述多能场高性能加工复杂曲面关键技术的最新进展,展示该领域研究成果中的关键科学与技术问题。首先,系统分析了超声振动辅助加工技术、激光加工技术和电火花加工技术等高能场在复杂曲面加工中的应用形式与工艺特点。其次,揭示了电解... 详细信息

综述多能场高性能加工复杂曲面关键技术的最新进展,展示该领域研究成果中的关键科学与技术问题。首先,系统分析了超声振动辅助加工技术、激光加工技术和电火花加工技术等高能场在复杂曲面加工中的应用形式与工艺特点。其次,揭示了电解加工技术、微量润滑绿色辅助加工技术和磁力辅助研磨加工技术等非高能场加工技术对复杂曲面加工效率与表面质量的影响机制。同时,将多个能场的优势相结合,突破多能场应用的关键技术,改善复杂曲面的加工效果。系统分析了多能场复合加工技术中低能场与低能场、高能场与低能场耦合的技术发展现状。最后,分析多能场复合加工技术中能场叠加带来的技术局限性,并对该技术领域未来的发展态势进行展望,为多能场高性能加工复杂曲面的工程应用提供参考。

关键词：多场复合加工复杂曲面薄壁件超声振动加工微量润滑技术电化学加工激光加工

同方期刊数据库

旋转超声加工对TiBw网状钛基复合材料表面残余应力的影响

在线全文

学校读者我要写书评

暂无评论

陕西师范大学学报（自然科学版） 2024年第2期52卷 8-13页

作者：董国军郭志清代勇赖睿达刘荣松哈尔滨工业大学机电工程学院黑龙江哈尔滨150001

为研究不同切削条件下旋转超声加工对材料表面残余应力的影响,选取硼化钛晶须(TiB whiskers,TiBw)网状钛基复合材料为实验对象,使用镍基电铸金刚石砂轮进行旋转超声加工,并分析了加工后材料的表面残余应力。结果表明:由于钛基复合材料... 详细信息

为研究不同切削条件下旋转超声加工对材料表面残余应力的影响,选取硼化钛晶须(TiB whiskers,TiBw)网状钛基复合材料为实验对象,使用镍基电铸金刚石砂轮进行旋转超声加工,并分析了加工后材料的表面残余应力。结果表明:由于钛基复合材料具有网状结构和优异的高温性能,使切削热和微观相变产生的残余应力较小,磨粒机械作用产生的残余应力更大。随着超声振动的引入,磨粒高频冲击工件表面,使旋转超声加工工件表面残余应力均大于普通磨削。在主轴转速n=9000 r/min,进给速度v f=8 mm/min,加工深度a p=25μm的加工参数下,旋转超声加工工件表面存在-540 MPa的残余压应力,随着主轴转速增大,残余应力显著减小,并且残余应力的影响层深度逐渐减小。超声振动的引入增大工件表面残余压应力,提高材料抗疲劳性能。

关键词：旋转超声加工 TiBw网状增强钛基复合材料残余应力

同方期刊数据库

Effect of functional groups on tribological properties of lubricants and mechanism investigation

在线全文

学校读者我要写书评

暂无评论

Friction 2023年第6期11卷 911-926页

作者： Hongxiang YU Haijie CHEN Zhiwen ZHENG Dan QIAO Dapeng FENG Zhenbin GONG guojun dong State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Nine organic compounds were utilized as model lubricants to investigate the impact of functional groups on tribological *** Acid with carboxyl showed the best lubrication properties,and fluid film and tribofilm were coexistent in its friction test,bringing a low friction coefficient and wear *** addition,the lubricant with low friction coefficient corresponded to high adsorption energy in density functional theory(DFT)*** the lubricant forming adsorption film with large surface energy displayed small wear rate in friction ***,adsorption energies positively correlated surface *** on the experimental results,the action mechanism of functional groups on tribological properties of lubricants was *** functional groups make lubricant molecules show different adsorption energies and surface *** molecules with high adsorption energy are more likely to adsorb on substrates and form a vertical monolayer,which can maintain a regular molecular brush structure during friction and bring a low friction *** lubricant molecules with high surface energy may be more prone having tribochemical reactions during friction and forming protective tribofilm,which leads to a low wear rate.

关键词： functional group tribological property adsorption energy surface energy action mechanism

Combining TDLAS and multi-fusion algorithms for methane gas concentration detection

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第6期20卷 353-359页

作者： SHI guojun SONG Xinmin dong Taiji School of Information&Electrical Engineering Heilongjiang Bayi Agricultural UniversityDaqing 163319China College of Electrical and Information Engineering Northeast Petroleum UniversityDaqing 163318China

High-precision methane gas detection is of great importance in industrial safety, energy production and environmental protection, etc. However, in the existing measurement techniques, the methane gas concentration information is susceptible to noise, which leads to its useful signal being drowned by noise. A fusion algorithm of variational modal decomposition(VMD) and improved wavelet threshold filtering is proposed, which is used in combination with tunable diode laser absorption spectroscopy(TDLAS) to implement a non-contact, high-resolution methane gas concentration detection. The fusion algorithm can perform noise reduction and further segmentation of the methane gas detection signal. And the simulation and experiment verify the effectiveness of the fusion algorithm, and the experimental results show that for the detection of air containing 10 ppm, 30 ppm, 60 ppm, 80 ppm, and 99 ppm methane, the errors are 12.75%, 8.18%, 3.37%, 2.46%, and 1.78%, respectively.

关键词： Combining TDLAS and multi-fusion algorithms for methane gas concentration detection TDLAS

在线全文

学校读者我要写书评

暂无评论

优质高产籼粳杂交稻新组合嘉丰优27的选育

中国种业 2024年第6期 166-168页

作者：金浩晶厉伟杉郑利欣曹郁青董国军浙江可得丰种业有限公司磐安322300 中国水稻研究所/水稻生物育种全国重点实验室浙江杭州311401

嘉丰优27是浙江可得丰种业有限公司、嘉兴市农业科学研究院、水稻生物育种全国重点实验室利用长粒粳型三系不育系嘉禾112A与恢复系P007配组而成的高产优质籼粳杂交稻新组合,具有高产、生育期适中、广适性强、米质优、中抗稻瘟病、抗倒... 详细信息

嘉丰优27是浙江可得丰种业有限公司、嘉兴市农业科学研究院、水稻生物育种全国重点实验室利用长粒粳型三系不育系嘉禾112A与恢复系P007配组而成的高产优质籼粳杂交稻新组合,具有高产、生育期适中、广适性强、米质优、中抗稻瘟病、抗倒能力强、耐冷性较强等优势,2023年通过国家农作物品种审定委员会审定,审定编号:国审稻20233029,适宜在长江中下游作双季晚稻种植。介绍了籼粳杂交稻嘉丰优27的选育过程、特征特性、产量表现及高产栽培制种技术等。

关键词：连作晚稻高产优质嘉丰优27 选育

维普期刊数据库博看期刊

优质高产籼粳杂交稻嘉丰优3号的选育及制种技术

在线全文

学校读者我要写书评

暂无评论

浙江农业科学 2024年第4期65卷 780-784页

作者：金浩晶曹郁青郑利欣厉伟杉马强董国军浙江可得丰种业有限公司浙江磐安322300 中国水稻研究所水稻生物育种全国重点实验室浙江杭州310006

嘉丰优3号是嘉兴市农业科学研究院联合中国水稻研究所、浙江可得丰种业有限公司,以嘉禾112A(长粒型粳稻三系不育系)为母本与G1143(中籼迟熟型恢复系)为父本选育的三系杂交水稻新组合。该组合具有高产、优质、中抗稻瘟病等优势,于2021年... 详细信息

嘉丰优3号是嘉兴市农业科学研究院联合中国水稻研究所、浙江可得丰种业有限公司,以嘉禾112A(长粒型粳稻三系不育系)为母本与G1143(中籼迟熟型恢复系)为父本选育的三系杂交水稻新组合。该组合具有高产、优质、中抗稻瘟病等优势,于2021年4月通过浙江审定(浙审稻2021019),2021—2023年先后通过了江西省[(赣)引种〔2021〕第001号]、安徽省(皖引稻2021066)、福建省[(闽)引种〔2022〕第1号]、湖北省(鄂引种2022055)的引种备案,适宜在长江中下游地区作中稻种植。文章介绍了嘉丰优3号的选育过程、特征特性、高产栽培及制种技术等。

关键词：优质高产籼粳杂交稻嘉丰优3号选育制种技术

维普期刊数据库博看期刊

Ice-Induced Vibrational Response of Single-Pile Offshore Wind-Turbine Foundations

在线全文

学校读者我要写书评

暂无评论

Fluid Dynamics & Materials Processing 2024年第3期20卷 625-639页

作者： Zhoujie Zhu Gang Wang Qingquan Liu guojun Wang Rui dong Dayong Zhang Department of Renewable Energy Engineering PowerChina Huadong Engineering Corporation LimitedHangzhou311122China School of Ocean Science and Technology Dalian University of TechnologyPanjin124221China Ningbo Institute of Dalian University of Technology Ningbo315000China

Important challenges must be addressed to make wind turbines sustainable renewable energy sources.A typical problem concerns the design of the *** the pile diameter is larger than that of the jacket platform,traditional mechanical models cannot be *** this study,relying on the seabed soil data of an offshore wind farm,the m-method and the equivalent embedded method are used to address the single-pile wind turbine foundation problem for different pile *** approach to determine the equivalent pile length is also proposed *** results provide evidence for the effectiveness and reliability of the model based on the equivalent embedded method.

关键词： Wind turbine ice-induced vibration dynamic response equivalent embedded method