检索结果-南通市图书馆

同方期刊数据库

低直链淀粉含量优质软米型水稻不育系科源A的选育及应用

在线全文

学校读者我要写书评

暂无评论

杂交水稻 2024年第1期39卷 59-61页

作者：陈韦韦邓国富周维永李经成伍豪马志广戴高兴广西壮族自治区农业科学院水稻研究所广西南宁530007 广西壮族自治区农业科学院广西南宁530007

科源A是广西农业科学院水稻研究所利用美B与宜香B杂交,后代经分子标记跟踪检测,多年定向选择含gs3、Wxb、fgr等基因的优良单株,再与美A测交、回交转育育成的优质软米型三系不育系。科源A花粉败育彻底、不育性稳定,有香味,异交率高,所配... 详细信息

科源A是广西农业科学院水稻研究所利用美B与宜香B杂交,后代经分子标记跟踪检测,多年定向选择含gs3、Wxb、fgr等基因的优良单株,再与美A测交、回交转育育成的优质软米型三系不育系。科源A花粉败育彻底、不育性稳定,有香味,异交率高,所配组合呈弱感光性,稻米品质优良,直链淀粉含量低、香甜软糯,2020年4月通过广西农作物品种审定委员会组织的技术鉴定。利用科源A已选育出2个优质杂交组合(科源优616、科源优610)通过国家品种审定。

关键词：杂交水稻不育系科源A 低直链淀粉含量优质软米选育

优质超级杂交稻万太优美占在海南的高产制种技术

在线全文

学校读者我要写书评

暂无评论

杂交水稻 2024年第3期39卷 97-99页

作者：陈韦韦邓国富周维永李经成伍豪彭德马志广戴高兴广西壮族自治区农业科学院水稻研究所广西南宁530007 广西壮族自治区农业科学院广西南宁530007

万太优美占是广西农科院水稻所选育的超级杂交水稻新组合,具有生育期适中、株型紧凑、分蘖力强、制种产量高、肥料高效利用等特性。根据万太优美占在海南乐东连续3 a的制种实践,总结了其在海南高产制种的相关技术。

关键词：杂交水稻超级稻万太优美占海南制种

同方期刊数据库

Photo-responsive functional materials based on light-driven molecular motors

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第3期13卷 407-420页

作者： Yanping deng Guiying Long Yang Zhang Wei Zhao guofu Zhou Ben L.Feringa Jiawen Chen SCNU-UG International Joint Laboratory of Molecular Science and Displays National Center for International Research on Green OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Stratingh Institute for Chemistry University of GroningenNijenborgh 49747AG GroningenThe Netherlands

In the past two decades,the research and development of light-triggered molecular machines have mainly focused on developing molecular devices at the nanoscale.A key scientific issue in the field is how to amplify the controlled motion of molecules at the nanoscale along multiple length scales,such as the mesoscopic or the macroscopic scale,or in a more practical perspective,how to convert molecular motion into changes of properties of a macroscopic ***-driven molecular motors are able to perform repetitive unidirectional rotation upon irradiation,which offers unique opportunities for responsive macroscopic *** several reviews that focus on the design,synthesis and operation of the motors at the nanoscale,photo-responsive macroscopic materials based on light-driven molecular motors have not been comprehensively *** the present review,we first discuss the strategy of confining absolute molecular rotation into relative rotation by grafting motors on ***,examples of self-assemble motors in supramolecular polymers with high internal order are ***,we will focus on building of motors in a covalently linked system such as polymeric gels and polymeric liquid crystals to generate complex responsive ***,a perspective toward future developments and opportunities is *** review helps us getting a more and more clear picture and understanding on how complex movement can be programmed in light-responsive systems and how man-made adaptive materials can be invented,which can serve as an important guideline for further design of complex and advanced responsive materials.

关键词： functions materials material

Disruption of LEAF LESION MIMIC 4 affects ABA synthesis and ROS accumulation in rice

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

作物学报:英文版 2023年第5期11卷 1341-1352页

作者： Hao Wu Gaoxing Dai Rao Yuchun Kaixiong Wu Junge Wang Peng Hu Yi Wen Yueying Wang Lixin Zhu Bingze Chai Jialong Liu guofu deng Qian Qian Jiang Hu Department of Agronomy College of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058ZhejiangChina Guangxi Crop Genetic Improvement and Biotechnology Laboratory Guangxi Academy of Agricultural SciencesNanning 530007GuangxiChina State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006ZhejiangChina College of Life Sciences Zhejiang Normal UniversityJinhua 321004ZhejiangChina

Lesion mimic mutants(LMMs) are advantageous materials for studying programmed cell death(PCD).Although some rice LMM genes have been cloned, the diversity of functions of these genes indicates that the mechanism of cell death regulation in LMMs needs further study. In this study, we identified a rice light-dependent leaf lesion mimic mutant 4(llm4) that showed abnormal chloroplast structure, photoinhibition, reduced photosynthetic protein levels, massive accumulation of reactive oxygen species(ROS), and PCD. Map-based cloning and complementation testing revealed that LLM4 encodes zeaxanthin epoxidase(ZEP), an enzyme involved in the xanthophyll cycle, which functions in plant photoprotection,ROS scavenging, and carotenoid and abscisic acid(ABA) biosynthesis. The ABA content was decreased,and the contents of 24 carotenoids differed between the llm4 mutant and the wild type(WT). The llm4mutant showed reduced dormancy and greater sensitive to ABA than the WT. We concluded that the mutation of LLM4 resulted in the failure of xanthophyll cycle, in turn causing ROS accumulation. The excessive ROS accumulation damaged chloroplast structure and induced PCD, leading eventually to the formation of lesion mimics.

关键词： Rice Lesion mimic Reactive oxygen species Programmed cell death Zeaxanthin epoxidase Xanthophyll cycle Carotenoid Abscisic acid

OsNPF3.1,a member of the NRT1/PTR family,increases nitrogen use efficiency and biomass production in rice

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2023年第1期11卷 108-118页

作者： Xinghai Yang Baoxuan Nong Can Chen Junrui Wang Xiuzhong Xia Zongqiong Zhang Yu Wei Yu Zeng Rui Feng Yanyan Wu Hui Guo Haifeng Yan Yuntao Liang Shuhui Liang Yong Yan Danting Li guofu deng Guangxi Key Laboratory of Rice Genetics and Breeding Rice Research InstituteGuangxi Academy of Agricultural SciencesNanning 530007GuangxiChina Guangxi Key Laboratory for Polysaccharide Materials and Modifications School of Marine Sciences and BiotechnologyGuangxi University for NationalitiesNanning 530006GuangxiChina Biotechnology Research Institute Guangxi Academy of Agricultural SciencesNanning 530007GuangxiChina Sugarcane Research Institute Guangxi Academy of Agricultural SciencesNanning 530007GuangxiChina Microbiology Research Institute Guangxi Academy of Agricultural SciencesNanning 530007GuangxiChina

The overuse of nitrogen(N)fertilizer in fields has increased production costs and raised environmental *** the N use efficiency(NUE)of rice varieties is crucial for sustainable *** we report the cloning and characterization of OsNPF3.1,a gene that controls rice *** amino acid mutation in the OsNPF3.1 coding region caused different NUEs in wild and cultivated ***3.1,which is expressed mainly in the aerial parts of rice,also affects rice plant height,heading date,and thousand-grain *** OsNPF3.1 protein is located in the plasma *** OsNPF3.1 was subjected to artificial selection,two naturally varying loci were associated with NUE,of which OsNPF3.1Chr6_8741040differed between indica and japonica ***3.1 can be used as a new target gene for breeding rice varieties with high NUE.

关键词： Rice OsNPF3.1 Functional analysis Evolutionary analysis Natural variation

Deterministic and Robust Volt-var Control Methods of Power System Based on Convex Deep Learning

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 719-729页

作者： Qing Ma Changhong deng the School of Electrical Engineering and Automation Wuhan UniversityWuhanChina

Volt-var control(VVC)is essentially a non-convex optimization problem due to the non-convexity of power flow(PF)constraints,resulting in the difficulty in obtaining the optimum without convexity *** existing second-order cone method for the convexity conversion often leads to a sharp increase in PF constraints and optimization variables,which in turn increases the optimization difficulty or even leads to optimization *** paper first proposes a deterministic VVC method based on convex deep learning power flow(DLPF).This method uses the input convex neural network(ICNN)to establish a single convex mapping between state parameters and node voltage to complete the convexity conversion while the optimization variables only correspond to reactive power equipment,which can ensure the global optimum with extremely fast computation *** cope with the impact brought by the uncertainty of distributed energy and omit the additional worst scenario search of traditional robust VVC,this paper proposes robust VVC method based on convex deep learning interval power flow(DLIPF),which continues to adopt ICNN to establish another convex mapping between state parameters and node voltage *** DLIPF with DLPF,this method decreases the modeling and optimization difficulty of robust VVC *** results on 30-bus,118-bus,and 200-bus systems prove the correctness and rapidity of the proposed methods.

关键词： Volt-var control convexity conversion convex deep learning power flow

Scattering of Water Waves by Dual Symmetric Inclined Floating Porous Barriers Using the DBEM

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2024年第1期38卷 156-168页

作者： WANG Li-xian deng Yan-wen YE Yang-sha deng Zheng-zhi Key Laboratory of High Performance Ship Technology(Wuhan University of Technology) Ministry of EducationWuhan 430063China School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan 430063China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China Institute of Port Coastal and Offshore EngineeringZhejiang UniversityZhoushan 316021China

The scattering of normally incident water waves by two surface-piercing inclined perforated barriers in water with a uniform finite depth is investigated within the framework of linear water wave *** that thin barriers are zero-thickness,a novel numerical method involving the the coupling of the dual boundary element method(DBEM)with damping layers is *** order to effectively damp out the reflected waves,two damping layers,instead of pseudoboundaries are implemented near the two side boundaries of the computational ***,the modified linearized free surface boundary conditions are formulated and used for solving both the ordinary boundary integral equation as well as the hypersingular boundary integral equation for degenerate *** newly developed numerical method is validated against analytical methods using the matched eigenfunction expansion method for the special case of two vertical barriers or the inclined angle to the vertical being *** influence of the length of the two damping layers has been ***,these findings are also validated against previous results for several *** validation,the numerical results for the reflection coefficient,transmission coefficient and dissipation coefficient are obtained by varying the inclination angle and porosity-effect *** effects of both the inclination angle and the porosity on the amplitudes of wave forces acting on both the front and rear barriers are also *** is found that the effect of the inclination angle mainly shifts the location of the extremal values of the reflection and the transmission ***,a moderate value of the porosity-parameter is quite effective at dissipating wave energy and mitigating the wave loads on dual barriers.

关键词： dual boundary element method inclined perforated floating breakwater reflection coefficient transmission coefficient damping layer

INVARIANTS-PRESERVING DU FORT-FRANKEL SCHEMES AND THEIR ANALYSES FOR NONLINEAR SCHRÖDINGER EQUATIONS WITH WAVE OPERATOR

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2024年第3期42卷 814-850页

作者： Dingwen deng Zhijun Li College of Mathematics and Information Science Nanchang Hangkong UniversityNanchang 330063China

Du Fort-Frankel finite difference method(FDM)was firstly proposed for linear diffusion equations with periodic boundary conditions by Du Fort and Frankel in *** is an explicit and unconditionally von Neumann stable ***,there has been no research work on numerical solutions of nonlinear Schrödinger equations with wave operator by using Du Fort-Frankel-type finite difference methods(FDMs).In this study,a class of invariants-preserving Du Fort-Frankel-type FDMs are firstly proposed for one-dimensional(1D)and two-dimensional(2D)nonlinear Schrödinger equations with wave *** using the discrete energy method,it is shown that their solutions possess the discrete energy and mass conservative laws,and conditionally converge to exact solutions with an order of for ofο(T^(2)+h_(x)^(2)+(T/h_(x))^(2))1D problem and an order ofο(T^(2)+h_(x)^(2)+h_(Y)^(2)+(T/h_(X))^(2)+(T/h_(y))^(2))for 2D problem in ***,τdenotes time-step size,while,hx and hy represent spatial meshsizes in x-and y-directions,***,by introducing a stabilized term,a type of stabilized invariants-preserving Du Fort-Frankel-type FDMs are *** not only preserve the discrete energies and masses,but also own much better stability than original ***,numerical results demonstrate the theoretical analyses.

关键词： Nonlinear Schrodinger equations with wave operator Du Fort-Frankel finite difference methods Discrete energy and mass conservative laws Numerical convergence

Broadband angular spectrum analog processors based on all-dielectric metasurfaces

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

Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 188-190页

作者： Lin deng Yongmin Liu Department of Electrical and Computer Engineering Northeastern UniversityBoston 02115USA Department of Mechanical and Industrial Engineering Northeastern UniversityBoston 02115USA

Digital signal processors are extensively used to execute mathematical operations and advanced computational tasks on digital ***,they suffer from several inherent limitations,including low speed,high energy consumption,and large memory requirements,because of the hardware bottleneck and the imperative conversion between digital and analogue signals.

关键词： dielectric spectrum hardware

同方期刊数据库