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AtRKD5 inhibits the parthenogenic potential mediated by AtBBM

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Journal of Integrative Plant Biology 2024年第7期66卷 1517-1531页

作者： Qiyan Liu Dongfen Han Denghu Cheng Jinfan Chen Shujuan Tian jiafa Wang Man Liu Li Yuan State Key Laboratory of Crop Stress Resistance and High‐Efﬁciency Production College of HorticultureNorthwest A&F UniversityYangling 712100China

Parthenogenesis,the development of unfertilized egg cells into embryos,is a key component of ***(BABY BOOM),a crucial regulator of embryogenesis in Arabidopsis,possesses the capacity to shift nutritional growth toward reproductive ***,the mechanisms underlying AtBBM-induced parthenogenesis remain largely unexplored in dicot *** findings revealed that in order to uphold the order of sexual reproduction,the embryo-specific promoter activity of AtBBM as well as repressors that inhibit its expression in egg cells combine to limiting its ability to induce ***,AtRKD5,a RWPRK domain-containing(RKD)transcription factor,binds to the 3'end of AtBBM and is identified as one of the inhibitory factors for AtBBM expression in the egg *** the atrkd5 mutant,we successfully achieved enhanced ectopic expression of AtBBM in egg cells,resulting in the generation of haploid offspring via parthenogenesis at a rate of 0.28%.Furthermore,by introducing chimeric Arabidopsis and rice BBM genes into the egg cell,we achieved a significant 4.6-fold enhancement in haploid induction through the atdmp8/9 *** findings lay a strong foundation for further exploration of the BBM-mediated parthenogenesis mechanism and the improvement of haploid breeding efficiency mediated by the dmp8/9 mutant.

关键词： AtBBM atdmp AtRKD5 haploid induction parthenogenesis

双馈风电机组虚拟惯量控制对电力系统机电振荡的影响分析

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电力系统自动化 2019年第12期43卷 11-17,43页

作者：徐筱倩黄林彬汪震贺家发辛焕海浙江大学电气工程学院

虚拟惯量控制能使双馈风电机组为电网提供类似同步发电机的调频特性而得到广泛关注,但同时这种有功-频率外特性将不可避免地使双馈风电机组参与到同步发电机的机电振荡模式中,导致系统动态变得更为复杂。为了揭示双馈风电机组中虚拟惯... 详细信息

虚拟惯量控制能使双馈风电机组为电网提供类似同步发电机的调频特性而得到广泛关注,但同时这种有功-频率外特性将不可避免地使双馈风电机组参与到同步发电机的机电振荡模式中,导致系统动态变得更为复杂。为了揭示双馈风电机组中虚拟惯量控制对电力系统机电振荡模式的影响规律,文中建立了基于虚拟惯量控制的双馈风电机组并网系统小信号模型,采用模态分析法分析了虚拟惯量控制相关控制回路(即虚拟惯量模拟环、锁相环和有功控制环)对同步发电机间机电振荡模式的影响规律。基于改进四机两区域系统的研究表明,增大下垂系数和适当增大滤波时间常数能改善系统阻尼,锁相环带宽和功率外环带宽过小将使双馈风电机组有功控制延迟,从而无法提供正向的阻尼转矩,导致系统阻尼减小。

关键词：双馈风电机组虚拟惯量控制机电振荡锁相环电力系统稳定

适应于弱电网的永磁直驱风电机组虚拟惯量协调控制策略

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电力系统自动化 2018年第9期42卷 83-90页

作者：贺家发宋美艳兰洲黄林彬辛焕海汪震浙江大学电气工程学院浙江省杭州市310027 西安交通大学电气工程学院陕西省西安市710049 国网浙江省电力公司经济技术研究院浙江省杭州市310006

大规模的风电机组并网使电力系统面临惯量减小与调频能力不足的问题,而风机的虚拟惯量控制是解决这一问题的重要手段。当前,永磁直驱风电机组的虚拟惯量控制主要通过将电网频率引入其功率控制或转矩控制中,来实现风机对电网的功率支撑,... 详细信息

大规模的风电机组并网使电力系统面临惯量减小与调频能力不足的问题,而风机的虚拟惯量控制是解决这一问题的重要手段。当前,永磁直驱风电机组的虚拟惯量控制主要通过将电网频率引入其功率控制或转矩控制中,来实现风机对电网的功率支撑,风电机组仍采用锁相环实现与电网的同步。但在弱电网下,锁相环的动态性能将恶化,甚至会导致风机的失稳。为此,提出一种适应于弱电网的永磁直驱风电机组虚拟惯量协调控制策略,该控制策略可利用直流电容动态实现直驱风电机组网侧逆变器的并网自同步,从而使直驱风电机组无需经过锁相环并网并且能适应于弱电网运行。此外,该控制策略可利用存储于风机的旋转动能为电网提供虚拟惯量。详细讨论了相应的并网自同步机理及惯量模拟机理,并基于MATLAB/Simulink仿真验证了该协调控制策略的有效性。

关键词：虚拟同步控制虚拟惯量协调控制策略永磁直驱风电机组弱电网

Natural variation in maize gene ZmSBR1 confers seedling resistance to Fusarium verticillioides

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The Crop Journal 2024年第3期12卷 836-844页

作者： Yunxia Song Peipei Ma Jingyang Gao Chaopei Dong Zhao Wang Yifan Luan jiafa Chen Doudou Sun Pei Jing Xuecai Zhang Weibin Song Zijian Zhou Jianyu Wu College of Agronomy Henan Agricultural UniversityZhengzhou 450002HenanChina College of Life Sciences Henan Agricultural UniversityZhengzhou 450002HenanChina Global Maize Program International Maize and Wheat Improvement Center(CIMMYT)Apdo 6-64106600 MexicoDFMexico National Maize Improvement Center Department of Plant Genetics and BreedingChina Agricultural UniversityBeijing 100193China

Maize seedling blight caused by Fusarium verticillioides is a widely occurring maize disease,but the genetics and mechanisms of resistance are not well *** this study,GWAS performed by MLM and 3VmrMLM identified 40 and 20 QTNs,associated with seedling blight *** methods identified 49 and 36 genes,*** verification of candidate gene ZmSBR1 identified by both methods showed that the resistance of a mutant line to seedling blight decreased by 0.37 grade points after inoculation with ***,compared with the *** length of the stem rot lesion caused by *** increased by 86%in mutant seedlings,and the relative length of the adult plant stalk rot increased by 35%in mutant plants compared to the wild type after inoculation with Fusarium *** analysis showed that expression of defense-related genes after inoculation was down-regulated in the mutant compared to the wild type,synthesis of secondary metabolites associated with resistance was reduced,and the immune response triggered by PAMP decreased,resulting in decreased resistance of mutant maize *** gene association analysis showed that most maize inbred lines carried the susceptible haplotype.A functional PCR marker was *** results demonstrated that ZmSBR1 conferred resistance to multiple Fusarium diseases at the seedling and adult growth stages and had important application value in breeding.

关键词： Seedling blight Stalk rot Multiple disease resistance

Toward to agricultural green development by multi-objective zoning and nitrogen nutrient management:a case study in the Baiyangdian Basin,China

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Frontiers of Agricultural Science and Engineering 2024年第1期11卷 140-154页

作者： Xiaomeng ZHANG Xiangwen FAN Wenqi MA Zhaohai BAI jiafa LUO Jing YANG Ling LIU Jianjie ZHANG Lin MA College of Resources and Environmental Sciences Hebei Agricultural UniversityBaoding 071000China Center for Agricultural Resources Research Institute of Genetic and Developmental BiologyChinese Academy of SciencesShijiazhuang 050022China Ruakura Research Centre AgResearch LimitedHamilton 3240New Zealand

Although China has achieved great advancements toward national food security,the country is still confronted with a range of challenges,including natural resource stress,imbalanced diets and environmental *** management of crop–livestock systems is the key measure to realize agricultural green ***,optimized management of crop–livestock systems that use multi-objective zoning is *** study employed a multi-objective zoning management approach to comprehensively analyze four indicators:ammonia volatilization,nitrogen surplus,soil carrying capacity and ecological red line *** its significant ecological integrity and a strong emphasis on sustainability,the Baiyangdian Basin serves as a unique and suitable test case for conducting analyses on multi-objective nutrient optimization management,with the aim to facilitate the agricultural green *** study finds that less than 8%of the area in the Baiyangdian Basin meet the acceptable environmental indicator standard,whereas around 50%of the area that had both nitrogen surplus and ammonia volatilization exceeded the *** of unified management,that is,the same management technique across the study areas,could result in an increase of areas meeting environmental indicator thresholds to 21.1%.This project developed a novel multi-indicator partition optimization method,in which distinct measures are tailored for different areas to satisfy multiple environmental *** of this method,could potentially bring more than 50%area below the threshold,and areas with ammonia emissions and nitrogen surplus could be reduced to 15.8%.The multi-indicators partition optimization method represents a more advanced and efficiency-oriented management approach when compared to unified *** approach could be regarded as the best available option to help China achieve agricultural transformation to improve efficient production and reduce e

关键词： Agricultural green development Baiyangdian Basin environmental emission threshold partition management

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执行时间预测驱动的工作流作业调度

国防科技大学学报 2024年第5期46卷 228-238页

作者：胡亚红邱圆圆毛家发浙江工业大学计算机科学与技术学院浙江杭州310023

针对工作流作业调度问题,提出使用关键路径法进行工作流的执行时间预测和资源分配。工作流执行时间预测算法使用并行应用有向无环图描述工作流中子作业的执行顺序。基于此顺序,为子作业进行系统资源的逻辑分配。根据子作业的特征和资源... 详细信息

针对工作流作业调度问题,提出使用关键路径法进行工作流的执行时间预测和资源分配。工作流执行时间预测算法使用并行应用有向无环图描述工作流中子作业的执行顺序。基于此顺序,为子作业进行系统资源的逻辑分配。根据子作业的特征和资源分配信息,使用梯度提升决策树进行子作业执行时间预测,并计算工作流的关键路径。关键路径上所有子作业的完成时间之和即为工作流的执行时间。若预测的工作流执行时间满足用户要求,则根据子作业执行顺序和资源分配方案进行作业调度,执行工作流。对比实验表明,两个工作流的执行时间预测误差分别为5.72%和1.57%。与Spark默认调度算法相比,工作流调度算法将两个工作流的完成时间分别缩短了15.71%和15.44%。

关键词：工作流时间预测关键路径调度算法梯度提升决策树

大断面软岩钢支架与吊环锚网喷联合支护技术创新对比研究

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工程质量 2014年第4期32卷 62-66,71页

作者：陆志东何家发彭小平张强中鼎国际工程有限责任公司江西南昌330096

对传统的隧道支护结构进行改进,提出了钢支架与吊环锚网喷联合支护技术,使钢支架与锚杆支护机理发生变化,改善了金属钢支架在软岩及破碎带中由被动支撑变为形成整体支护圈,大大减少支架变形和破坏程度,从而保证了施工安全,成功运用于工... 详细信息

对传统的隧道支护结构进行改进,提出了钢支架与吊环锚网喷联合支护技术,使钢支架与锚杆支护机理发生变化,改善了金属钢支架在软岩及破碎带中由被动支撑变为形成整体支护圈,大大减少支架变形和破坏程度,从而保证了施工安全,成功运用于工程实践,达到了施工快速、高效,其社会效益和经济效益显著。

关键词：支护结构支护机理软岩破碎带工程实践

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格宾护垫式护坡施工技术开发与应用

工程质量 2013年第12期31卷 72-74页

作者：何家发陆志东彭小平张强中鼎国际工程有限责任公司江西南昌330096

介绍了格宾护垫式护坡施工技术,具有透水性能好、经久耐用、利于植被生长等优点,抗变形能力相对传统砌筑式方法施工的护坡抗毁损能力大为提高。格宾护垫式护坡施工效率高,植被成活率高,易形成绿化生态网带,能有效防止护坡护堤的水土流失... 详细信息

介绍了格宾护垫式护坡施工技术,具有透水性能好、经久耐用、利于植被生长等优点,抗变形能力相对传统砌筑式方法施工的护坡抗毁损能力大为提高。格宾护垫式护坡施工效率高,植被成活率高,易形成绿化生态网带,能有效防止护坡护堤的水土流失,保证了护堤的质量,又促进了环境保护及美化,具有较好的环保、技术、经济及社会等综合效益。

关键词：格宾护垫护坡环境保护综合效益

鱼洞坝水利工程验收检验评价体系及评价方法研究

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小水电 2024年第5期 18-21页

作者：蒋家发贵州省盘州市水务局水务工程建设站贵州盘州553537

采用层次分析法(AHP)和模糊数学理论(AFM)相结合的AHP-AFM评价方法建立了水利工程验收检验的评价指标体系,运用该方法对贵州省鱼洞坝水利工程进行验收评价。结果表明:该水利工程验收综合评价等级为良好,主要工作落实到位,但在验收申请... 详细信息

采用层次分析法(AHP)和模糊数学理论(AFM)相结合的AHP-AFM评价方法建立了水利工程验收检验的评价指标体系,运用该方法对贵州省鱼洞坝水利工程进行验收评价。结果表明:该水利工程验收综合评价等级为良好,主要工作落实到位,但在验收申请、检查质量验收等方面还有待进一步完善。图1幅,表3个。

关键词：水利工程验收检验评价体系评价方法