检索结果-南通市图书馆

Genome-wide and candidate gene association studies identify BnPAP17 as conferring the utilization of organic phosphorus in oilseed rape

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第4期23卷 1134-1149页

作者： Ping Xu Hao Li Haiyuan Li Ge zhao Shengjie Dai xiaoyu Cui Zhenning Liu Lei Shi Xiaohua Wang College of Agriculture and Forestry Science Linyi UniversityLinyi 27600China National Key Laboratory of Crop Genetic Improvement/Microelement Research Centre/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River) Ministry of Agriculture and Rural Affairs/Huazhong Agricultural UniversityWuhan 430070China

Phosphorus(P)is essential for living plants,and P deficiency is one of the key factors limiting the yield in rapeseed production *** the most important organ for plants,root morphology traits(RMTs)play a key role in P *** investigate the genetic variability of RMT under low P availability,we dissected the genetic structure of RMTs by genome-wide association studies(GWAS),linkage mapping and candidate gene association studies(CGAS).A total of 52 suggestive loci were associated with RMTs under P stress conditions in 405 oilseed rape *** purple acid phosphatase gene BnPAP17 was found to control the lateral root number(LRN)and root dry weight(RDW)under low P *** expression of BnPAP17 was increased in shoot tissue in P-efficient cultivars compared to root tissue and P-inefficient cultivars in response to low P ***,the haplotype of BnPAP17^(Hap3)was detected for the selective breeding of P efficiency in oilseed ***-expression of the BnPAP17^(Hap3)could promote the shoot and root growth with enhanced tolerance to low P stress and organic phosphorus(Po)utilization in oilseed ***,these findings increase our understanding of the mechanisms underlying BnPAP17-mediated low P stress tolerance in oilseed rape.

关键词： genome-wide association studies(GWAS) root morphology traits(RMTs) organic phosphorus(Po) oilseed rape BnPAP17

激光金属沉积成形304奥氏体不锈钢的缺陷和硬化现象

在线全文

学校读者我要写书评

暂无评论

焊接 2024年第6期 26-32,46页

作者：黄伟波潘林晖郑泽欣梁诗禹鲁文佳赵晓宇朱丽莎肇庆学院广东肇庆526061

【目的】为了掌握激光金属沉积成形304奥氏体不锈钢的材料缺陷和硬化情况,为后续该技术成形金属材料的工程应用提供参考。【方法】该文对激光金属沉积成形304奥氏体不锈钢的材料缺陷和单调/循环交变载荷作用下的硬化现象进行了研究。【... 详细信息

【目的】为了掌握激光金属沉积成形304奥氏体不锈钢的材料缺陷和硬化情况,为后续该技术成形金属材料的工程应用提供参考。【方法】该文对激光金属沉积成形304奥氏体不锈钢的材料缺陷和单调/循环交变载荷作用下的硬化现象进行了研究。【结果】研究结果表明,激光金属沉积成形材料的表面十分粗糙并具有明显的堆叠痕迹,成形材料中存在孔洞、氧化物夹杂和未熔颗粒等缺陷;在单调载荷作用下,成形材料表现出应变硬化,应变硬化指数为0.4,低于传统锻造工艺成形材料;在应变控制的循环交变载荷作用下,成形材料在试验起始阶段产生循环硬化,而在较低应力控制的循环交变载荷作用下,成形材料在试验起始阶段产生循环软化,随着循环加载次数的增加,成形材料产生循环硬化。【结论】由于独特的成形工艺,激光金属沉积成形304奥氏体不锈钢不可避免存在材料缺陷,在单调载荷、应变控制的循环交变载荷及较低应力控制的循环交变载荷作用下均会出现硬化现象。

关键词：激光金属沉积 304奥氏体不锈钢材料缺陷应变硬化循环硬化

抽水蓄能电站连续满发小时数和装机容量的设计选择

在线全文

学校读者我要写书评

暂无评论

水力发电 2024年第3期50卷 88-93页

作者：赵常伟张扬赵晓宇国网新源控股有限公司华北开发建设分公司天津300010 山东泰山抽水蓄能电站有限责任公司山东泰安271000

抽水蓄能电站设计中关于连续满发小时数的选择,业内长期存在争议。为实现连续满发小时数和装机容量的最优配置,对某虚拟抽水蓄能电站连续满发小时数设计了3种方案,通过对各个方案在不同电网中的模拟运行数据分析,研究了连续满发小时数... 详细信息

抽水蓄能电站设计中关于连续满发小时数的选择,业内长期存在争议。为实现连续满发小时数和装机容量的最优配置,对某虚拟抽水蓄能电站连续满发小时数设计了3种方案,通过对各个方案在不同电网中的模拟运行数据分析,研究了连续满发小时数与电网发电负荷特征的匹配关系,提出了定量确定连续满发小时数的基本原则。

关键词：抽水蓄能电站连续满发小时数蓄能量水能设计电力辅助服务

A Differential Game Based Approach Against Objective Function Attack in Cognitive Networks

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2018年第4期27卷 879-888页

作者： FENG Guangsheng LIN Junyu zhao Qian WANG Huiqiang LYU Hongwu zhao xiaoyu HAN Jizhong LI Bingyang College of Computer Science and Technology Harbin Engineering University Institute of Information Engineering Chinese Academy of Sciences School of Computer and Information Engineering Harbin University of Commerce

We study the problem of defense strategy against Objective function attack(OFA) in Cognitive networks(CNs), where the network can be operated at the optimal state by adapting the parameters of its objective function. An OFA attacker can disrupt the parameter adaptation by interfering measures, which results in some operating parameters of the objective function deviating from their optimal settings. We first model the interactive process between the OFA attacker and defense system using differential game theory, and propose a defense strategy by introducing a new metric, namely, threat factor. Then,we obtain the optimal defense strategy by proving the existence of the saddle point of the proposed model. Moreover,this defense strategy is scale-free such that it can conquer a large number of OFAs in a decentralized way. Finally, we conduct extensive simulations to show that the proposed approach is effective.

关键词： Cognitive networks Objective function Operating parameter Saddle point

Lactate regulates major zygotic genome activation by H3K18 lactylation in mammals

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2024年第2期11卷 124-134页

作者： Jingyu Li Weibo Hou Qi zhao Wei Han Hongdi Cui Songling Xiao Ling Zhu Jiadan Qu xiaoyu Liu Weitao Cong Jingling Shen Yuzheng zhao Shaorong Gao Guoning Huang Qingran Kong Chongqing Key Laboratory of Human Embryo Engineering Center for Reproductive Medicine Chongqing Health Center for Women and ChildrenWomen and Children's Hospital of Chongqing Medical University Oujiang Laboratory Zhejiang Provincial Key Laboratory of Medical Genetics Key Laboratory of Laboratory MedicineMinistry of EducationSchool of Laboratory Medicine and Life Sciences Wenzhou Medical University Frontier Science Center for Stem Cell Research School of Life Sciences and Technology Tongji University School of Pharmaceutical Science Wenzhou Medical University Institute of Life Sciences College of Life and Environmental Sciences Wenzhou University Optogenetics&Synthetic Biology Interdisciplinary Research Center State Key Laboratory of Bioreactor Engineering Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism School of Pharmacy East China University of Science and Technology

Lactate is present at a high level in the microenvironment of mammalian preimplantation embryos in vivo and in vitro. However, its role in preimplantation development is unclear. Here, we report that lactate is highly enriched in the nuclei of early embryos when major zygotic genome activation(ZGA) occurs in humans and mice. The inhibition of its production and uptake results in developmental arrest at the 2-cell stage, major ZGA failure, and loss of lactate-derived H3K18lac, which could be rescued by the addition of Lac-Co A and recapitulated by overexpression of H3K18R mutation. By profiling the landscape of H3K18lac during mouse preimplantation development, we show that H3K18lac is enriched on the promoter regions of most major ZGA genes and correlates with their expressions. In humans, H3K18lac is also enriched in ZGA markers and temporally concomitant with their expressions. Taken together, we profile the landscapes of H3K18lac in mouse and human preimplantation embryos, and demonstrate the important role for H3K18lac in major ZGA, showing that a conserved metabolic mechanism underlies preimplantation development of mammalian embryos.

关键词： mammalian preimplantation development lactate epigenetic remodeling histone lactylation zygotic genome activation

剑麻生物质多孔碳/硫复合电极材料的制备及性能

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

河北科技师范学院学报 2024年第1期38卷 62-70页

作者：柴英杰雷紫杰王利江李巍李博文王薇妍赵夏雨赵桐韩璐张志伟沈星星蔡爱军河北科技师范学院化学工程学院河北秦皇岛066600 河北科技师范学院海洋资源与环境学院河北秦皇岛066600

为解决锂硫(Li-S)电池在实际应用中S和Li_(2)S_(2)/Li_(2)S不导电、体积膨胀和多硫化物的“穿梭效应”等问题,本次试验采用化学活化法制备剑麻基生物碳(AC),熔融扩散法制备碳/硫复合正极材料(ACS),因多壁碳纳米管(MWCNTs)具有独特的三... 详细信息

为解决锂硫(Li-S)电池在实际应用中S和Li_(2)S_(2)/Li_(2)S不导电、体积膨胀和多硫化物的“穿梭效应”等问题,本次试验采用化学活化法制备剑麻基生物碳(AC),熔融扩散法制备碳/硫复合正极材料(ACS),因多壁碳纳米管(MWCNTs)具有独特的三维结构,可以抑制多硫化物的穿梭效应,将其作为隔膜涂层(YTC)。试验结果表明,在0.10 C倍率下,YTC电池的初始放电容量为974.3 mAh·g^(-1),循环200圈后容量保持在622 mAh·g^(-1)。进一步说明在隔膜上涂覆MWCNTs与正极材料结合,可提高材料导电性和抑制多硫化物的穿梭效应,表现出良好的循环性能和库伦效率。

关键词： Li-S电池多硫化物正极材料隔膜涂层

Enterogenic Stenotrophomonas maltophilia migrates to the mammary gland to induce mastitis by activating the calcium-ROS-AMPK-mTOR-autophagy pathway

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2024年第1期15卷 236-252页

作者： zhaoqi He Caijun zhao Yuhong He Zhuoyu Liu Guyue Fan Kun Zhu Yiqi Wang Naisheng Zhang Yunhe Fu xiaoyu Hu Department of Clinical Veterinary Medicine College of Veterinary MedicineJilin UniversityChangchun 130062Jilin ProvinceChina

Background Mastitis is an inflammatory disease of the mammary gland that has serious economic impacts on the dairy industry and endangers food *** previous study found that the body has a gut/rumen-mammary gland axis and that disturbance of the gut/rumen microbiota could result in‘gastroenterogenic mastitis'.However,the mechanism has not been fully ***,we found that long-term feeding of a high-concentrate diet induced mastitis in dairy cows,and the abundance of Stenotrophomonas maltophilia(***)was significantly increased in both the rumen and milk ***,we hypothesized that‘gastroenterogenic mastitis'can be induced by the migration of endogenous gut bacteria to the mammary ***,this study investigated the mechanism by which enterogenic *** induces *** First,*** was labelled with superfolder GFP and administered to mice via *** results showed that treatment with *** promoted the occurrence of mastitis and increased the permeability of the blood-milk barrier,leading to intestinal inflammation and intestinal ***,tracking of ingested *** revealed that *** could migrate from the gut to the mammary gland and induce ***,mammary gland transcriptome analysis showed that the calcium and AMPK signalling pathways were significantly upregulated in mice treated with ***,using mouse mammary epithelial cells(MMECs),we verified that *** induces mastitis through activation of the calcium-ROS-AMPK-mTOR-autophagy *** In conclusion,the results showed that enterogenic *** could migrate from the gut to the mammary gland via the gut-mammary axis and activate the calcium-ROS-AMPK-mTOR-autophagy pathway to induce *** the gut-mammary gland axis may also be an effective method to treat mastitis.

关键词： Calcium-ROS-AMPK-mTOR-autophagy pathway Gut-mammary axis Mastitis S.maltophilia

IDD-YOLOv7:一种用于输电线路绝缘子多缺陷的轻量化检测方法

在线全文

学校读者我要写书评

暂无评论

图学学报 2024年第1期45卷 90-101页

作者：翟永杰赵晓瑜王璐瑶王亚茹宋晓轲朱浩硕华北电力大学自动化系河北省保定市071003

YOLO目标检测算法是当前基于图像的输电线路绝缘子缺陷检测的主流方法,然而现有模型复杂度较大,亟需合理有效的参数压缩方法作为前提条件,来为解决无人机边缘设备部署的困境问题奠定基础;同时,无人机航拍的绝缘子缺陷图像背景复杂、缺... 详细信息

YOLO目标检测算法是当前基于图像的输电线路绝缘子缺陷检测的主流方法,然而现有模型复杂度较大,亟需合理有效的参数压缩方法作为前提条件,来为解决无人机边缘设备部署的困境问题奠定基础;同时,无人机航拍的绝缘子缺陷图像背景复杂、缺陷尺寸较小,容易出现误检、漏检等问题。为此,提出了一种用于输电线路绝缘子多缺陷检测的Insulator Defect Detection-YOLOv7(IDD-YOLOv7)模型,以降低模型复杂度,提高模型鲁棒性。首先,在多尺度特征融合的过程中加入坐标注意力(Coordinate Attention)机制,抑制复杂背景的干扰,提升模型对小目标的全局感知能力;之后,设计C3GhostNetV2模块,用于捕获不同空间像素之间的远程依赖性,在增强模型表达能力的同时降低模型的参数量和浮点运算量;最后,提出Focal-CIoU损失函数,提高模型高质量anchor的贡献,加快模型的收敛速度。实验结果表明,本文方法与基线模型相比mAP^(50)提升了3.8%,查准率和召回率分别提升了1.7%和7.6%,参数量和浮点运算量分别下降了18.3%和14.0%,绝缘子自爆、破损、闪络缺陷的AP^(50)分别提升了0.8%、4.5%、6.3%。

关键词： YOLOv7 绝缘子缺陷检测注意力机制模型复杂度轻量化损失函数

思政元素与《材料力学》课程融合的探索与实践

在线全文

学校读者我要写书评

暂无评论

时代汽车 2024年第6期 89-91页

作者：黄伟波赵晓宇肇庆学院机械与汽车工程学院广东省肇庆市526061

《材料力学》是机械类专业的学科基础课,在专业教学中具有重要的位置。课程思政要融入高校的课堂教学建设,并贯穿于整个教学过程。教师的具有较高的思政水平是保证思政教学的前提。如何将思政元素与课程教学的各个环节有机地结合是保证... 详细信息

《材料力学》是机械类专业的学科基础课,在专业教学中具有重要的位置。课程思政要融入高校的课堂教学建设,并贯穿于整个教学过程。教师的具有较高的思政水平是保证思政教学的前提。如何将思政元素与课程教学的各个环节有机地结合是保证高校课程思政教育的根本。通过改革教学内容和考核模式,将思政元素融入到课程教学中,在保障专业教育的同时,激发学生的爱国热情、增强学生的民族自豪感。

关键词：材料力学思政元素教学建设