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Genetic architecture of maize yield traits dissected by QTL mapping and GWAS in maize

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The Crop Journal 2022年第2期10卷 436-446页

作者： Xiao Zhang Zhiyong Ren Bowen Luo Haixu Zhong Peng Ma Hongkai Zhang Hongmei Hu Yikai Wang Haiying Zhang Dan Liu Ling Wu Zhi Nie yonghui zhu Wenzhu He Suzhi Zhang Shunzong Su Yaou Shen Shibin Gao Maize Research Institute Sichuan Agricultural UniversityChengdu 611130SichuanChina Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region Ministry of AgricultureChengdu 611130SichuanChina Guangxi Qingqing Agricultural Technology CO. LTD.Nanning 530000GuangxiChina Biotechnology and Nuclear Technology Research Institute Sichuan Academy of Agricultural SciencesChengdu 610066SichuanChina Crop Research Institute Sichuan Academy of Agricultural SciencesChengdu 610066SichuanChina State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Chengdu 611130SichuanChina g College of Agronomy Sichuan Agricultural UniversityChengdu 611130SichuanChina

The study of yield traits can reveal the genetic architecture of grain yield for improving maize production.In this study, an association panel comprising 362 inbred lines and a recombinant inbred line population derived from X178 × 9782 were used to identify candidate genes for nine yield traits. High-priority overlap(HPO) genes, which are genes prioritized in a genome-wide association study(GWAS), were investigated using coexpression networks. The GWAS identified 51 environmentally stable SNPs in two environments and 36 pleiotropic SNPs, including three SNPs with both attributes. Seven hotspots containing 41 trait-associated SNPs were identified on six chromosomes by permutation. Pyramiding of superior alleles showed a highly positive effect on all traits, and the phenotypic values of ear diameter and ear weight consistently corresponded with the number of superior alleles in tropical and temperate germplasm. A total of 61 HPO genes were detected after trait-associated SNPs were combined with the coexpression networks. Linkage mapping identified 16 environmentally stable and 16 pleiotropic QTL.Seven SNPs that were located in QTL intervals were assigned as consensus SNPs for the yield traits.Among the candidate genes predicted by our study, some genes were confirmed to function in seed development. The gene Zm00001 d016656 encoding a serine/threonine protein kinase was associated with five different traits across multiple environments. Some genes were uniquely expressed in specific tissues and at certain stages of seed development. These findings will provide genetic information and resources for molecular breeding of maize grain yield.

关键词： Maize Yield traits Genome-wide association study(GWAS) Quantitative trait locus(QTL) Coexpression networks

基于GeoGebra曲线的图案设计及其应用

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毛纺科技 2024年第3期52卷 81-87页

作者：朱永慧刘冬云张毅江南大学设计学院江苏无锡214122

为提升图案设计效率、丰富图案设计方法,基于GeoGebra软件进行图形提取和二次设计。在GeoGebra软件中调节曲线表达式中的参数数值,使曲线产生动态变化并生成曲线图形。根据图形构成特征进行因子提取,引入形状文法将所提取因子进行重构... 详细信息

为提升图案设计效率、丰富图案设计方法,基于GeoGebra软件进行图形提取和二次设计。在GeoGebra软件中调节曲线表达式中的参数数值,使曲线产生动态变化并生成曲线图形。根据图形构成特征进行因子提取,引入形状文法将所提取因子进行重构并构建设计因子库,最后结合图案设计理念对设计因子库的可行性进行验证。研究表明:对GeoGebra曲线进行因子提取与重构,可以将数字化图形的生成方式融入图案设计中;运用设计因子库进行图案设计,将创新图案应用于设计实践,可以实现现代图案的创新设计,丰富图案设计方式在产品中的表达。

关键词：数学曲线图形 GeoGebra 提取与重构设计因子库图案设计

基于SQP算法的厢舱类产品快速设计技术研究

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机械设计 2024年第S1期41卷 64-69页

作者：朱永辉张胜文支辰羽罗瑞旭李坤江苏科技大学机械工程学院江苏镇江212003

针对大规模定制背景下产品设计制造过程中遇到的轻量化和强度校核等需求,提出了一种基于序列二次规划(SQP)算法的结构优化与快速设计方法。以方舱为实例对象,按照最优控制理论构建产品关键参数设计数学计算模型,并运用SQP算法实现参数... 详细信息

针对大规模定制背景下产品设计制造过程中遇到的轻量化和强度校核等需求,提出了一种基于序列二次规划(SQP)算法的结构优化与快速设计方法。以方舱为实例对象,按照最优控制理论构建产品关键参数设计数学计算模型,并运用SQP算法实现参数的最优求解,同时通过产品族模块化划分和参数化变型配置技术实现产品结构的快速设计。最后通过二次开发构建了相应的数字化设计平台,验证了该方法的可行性。结果表明:该方法能有效提高产品结构设计的效率和合理性。

关键词：序列二次规划产品族数字化设计最优控制

新型农业经营主体在农村发展中的实践研究--以铜陵市水村村为例

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铜陵职业技术学院学报 2024年第1期23卷 50-54页

作者：陈龙李晓东牛永辉安徽科技学院安徽蚌埠233000

如何有效激活农村发展的内生动力,是助推乡村振兴的关键举措。在现代化发展的大背景之下,单纯依靠农村去发展农村的道路是行不通的,必须要有专业化的新型农业经营主体去领导农村发展。以实地调研法对安徽省铜陵市水村村的新型农业经营... 详细信息

如何有效激活农村发展的内生动力,是助推乡村振兴的关键举措。在现代化发展的大背景之下,单纯依靠农村去发展农村的道路是行不通的,必须要有专业化的新型农业经营主体去领导农村发展。以实地调研法对安徽省铜陵市水村村的新型农业经营主体发展情况进行研究和分析,总结发现新型农业经营主体对于农村发展有着多方面的推动作用,包括但不限于为村落发展提供资金支持、强化科学管理、增强抗风险能力、延长产业链、促进可持续发展、扩大经济效益等方面,以期通过对水村村新型农业经营主体的发展分析,提炼出合理有效且可供借鉴的农村发展经验和模式,助推乡村振兴的稳步实现。

关键词：新型农业经营主体农业农村现代化产业融合乡村旅游

基于苏州园林太湖石审美特征的紫砂茶具创新设计

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时尚设计与工程 2024年第2期 6-8页

作者：朱永慧于毅刘冬云张毅江南大学

归纳总结了苏州园林中太湖石的审美特征,并应用于紫砂茶具现代创新设计中。采用文献研读法与田野调查法,对苏州园林太湖石进行实物资料收集与整理,并从造型、色彩、意蕴这3个方面对苏州园林中太湖石形象进行艺术特征探析。在得到分析结... 详细信息

归纳总结了苏州园林中太湖石的审美特征,并应用于紫砂茶具现代创新设计中。采用文献研读法与田野调查法,对苏州园林太湖石进行实物资料收集与整理,并从造型、色彩、意蕴这3个方面对苏州园林中太湖石形象进行艺术特征探析。在得到分析结果后,基于现代仿生设计手法,将苏州园林太湖石形象进行元素提取,通过图案增强的处理手段将所提取元素图案进行再设计,并应用于紫砂设计中。研究认为,苏州园林中太湖石形象具有趣韵灵动之形、雅素出尘之色、脱凡窥镜之意的艺术特征。将太湖石所具有的艺术特征通过仿生设计进行抽象提炼处理后应用于紫砂茶具现代化设计中,为当下紫砂茶具设计赋予新的文化内涵和传统紫砂技艺的现代化发展提供了理论参考。

关键词：苏州园林太湖石紫砂茶具仿生设计学

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局部干法水下激光焊接装置研制及工艺试验

电焊机 2024年第1期54卷 50-54页

作者：张义林张玉佳朱勇辉朱加雷袁军付超中国核动力研究设计院四川成都610213 北京石油化工学院北京102600

针对核电站乏池边角位置的水下修复需求,研制了一套局部干法水下激光焊接装置,可在实现常规水下平焊位置焊接的同时,重点兼顾角焊缝的局部干法水下焊接作业需求。同时,该装置还具备水下焊接位置的照明、焊接环境和焊接过程的实时监控、... 详细信息

针对核电站乏池边角位置的水下修复需求,研制了一套局部干法水下激光焊接装置,可在实现常规水下平焊位置焊接的同时,重点兼顾角焊缝的局部干法水下焊接作业需求。同时,该装置还具备水下焊接位置的照明、焊接环境和焊接过程的实时监控、焊接区域的温湿度监测等功能。采用研制的局部干法水下焊接装置,对核电站乏池常用的304不锈钢材料进行了水下焊接工艺试验,结果表明:水下焊接焊缝的成形良好,水下焊缝的宏观形貌、截面形貌和金相组织与空气环境成形焊缝无显著差异。

关键词：角焊缝激光焊接局部干法装置研制

Resource Allocation for IRS Assistedmm Wave Wireless Powered Sensor Networks with User Cooperation

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工程与科学中的计算机建模(英文) 2024年第1期138卷 663-677页

作者： yonghui Lin Zhengyu zhu Network Center Zhengzhou UniversityZhengzhou450001China School of Electrical and Information Engineering Zhengzhou UniversityZhengzhou450001China

In this paper,we investigate IRS-aided user cooperation(UC)scheme in millimeter wave(mmWave)wirelesspowered sensor networks(WPSN),where two single-antenna users are wireless powered in the wireless energy transfer(WET)phase first and then cooperatively transmit information to a hybrid access point(AP)in the wireless information transmission(WIT)phase,following which the IRS is deployed to enhance the system performance of theWET andWIT.We maximized the weighted sum-rate problem by jointly optimizing the transmit time slots,power allocations,and the phase shifts of the IRS.Due to the non-convexity of the original problem,a semidefinite programming relaxation-based approach is proposed to convert the formulated problem to a convex optimization framework,which can obtain the optimal global solution.Simulation results demonstrate that the weighted sum throughput of the proposed UC scheme outperforms the non-UC scheme whether equipped with IRS or not.

关键词： Intelligent reflecting surface millimeter wave wireless powered sensor networks user cooperation resource allocation

TRANSVERSAL INERTIAL EFFECT ON RELAXATION/RETARDATION TIME OF CEMENT MORTAR UNDER HARMONIC WAVE

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Acta Mechanica Solida Sinica 2008年第1期21卷 44-50页

作者： Jue zhu yonghui Cao Jiankang Chen Mechanics and Materials Science Research Center Ningbo University Ningbo 315211 China

Under dynamic loading, the constitutive relation of the cement mortar will be significantly affected by the transversal inertial effect of specimens with large diameters. In this paper, one-dimensional theoretical analysis is carried out to determine the transversal inertial effect on the relaxation/retardation time of the cement mortar under the harmonic wave. Relaxation time or retardation time is obtained by means of the wave velocity, attenuation coefficient and the frequency of the harmonic wave. Thus, the transversal inertial effect on the relaxation time from Maxwell model, as well as on retardation time from Voigt model is analyzed. The results show that the transversal inertial effect may lead to the increase of the relaxation time, but induce the decrease of the retardation time. Those should be taken into account when eliminating the transversal inertial effect in applications.

关键词： cement mortar harmonic wave viscoelastic model relaxation/retardation time

Experimental investigation on breaching of embankments

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Science China(Technological Sciences) 2011年第2期54卷 148-155页

作者： zhu yonghui VISSER P J VRIJLING J K WANG GuangQian State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Changjiang River Scientific Research Institute Changjiang Water Resources Commission Wuhan 430010 China Faculty of Civil Engineering and Geosciences Delft University of Technology Delft 2600 GA Netherlands

Breaching of embankments has recently drawn more and more attention due to its importance in the development of early warning systems for embankment failures,in the evacuation plans of people at risk,in the design method of embankments based on a risk-approach,etc. The erosion process observed during embankment breaching tests in the laboratory and the analysis of the results are described in this paper. Five embankments,one constructed with pure sand,four with different sand-silt-clay mixtures were tested. The height of the embankments was 75 cm and the width at the crest was 60 cm. Examination of the data from these tests indicated that headcut erosion played an important role in the process of breach growth in the embankments made of cohesive soil mixtures. Flow shear erosion,fluidization of the headcut slope surface,undermining of the headcut due to impinging jet scour and discrete soil mechanical slope mass failure from the headcut were all observed during these tests. For the embankment constructed with pure sand,the breach erosion process was dominated by shear erosion,which led to a gradual and relatively uniform retreat of the downstream slope. The cohesive proportion in the sand-silt-clay mixtures strongly slowed down the erosion process.

关键词：试验数据侵蚀过程堤防设计路堤砂质粘土预警系统增长过程岩体破坏