优化建筑装修施工技术管理的重要性分析

随着社会经济的不断发展,我国的建筑装修行业施工技术水平也有了较大的进步。这一跨越式的发展成就主要得益于国家经济政策的大力支持和建筑施工技术管理水平的不断优化,但是其还有一定的进步空间。     

新型溴化聚醚PBrMEO的合成及表征

以1,4-丁二醇为起始剂,三氟化硼乙醚络合物为催化剂,3-溴甲基-3-乙基氧杂环丁烷为单体,二氯甲烷为溶剂,按阳离子开环聚合机理,首次合成出新型溴化聚醚(PBrMEO),用IR、1HNMR、GPC、TGA、DSC等测试方法对合成产物进行了表征.结果表明,制备出的PBrMEO均聚物Mn为3000,相对分子质量分布为1.243～1.301,Tg为32.36℃,熔程为118.96～132.84℃,热分解温度为337℃.     

单片电磁摩擦离合器加速时间、结合功、热流密度的计算

提出将加速过程按时间分段的方法,利用已知公式迭代求解单片电磁摩擦离合器的加速时间、结合功、热流密度.并讨论热流密度随时间及摩擦片半径变化的规律,为进一步进行电磁离合器温度场分析打下基础.     

陀螺仪装配工艺设计

介绍大批量生产的某型陀螺仪装配工艺设计的过程.经过生产实践证明,提高了工作效率,保证了产品质量,取得了良好的效益.     

对邮件过滤技术发展现状的比较与分析

对自学习的过滤技术进行比较和分析,包括已经商品化的方法和目前还处于理论研究阶段的方法,尤其介绍基于机器学习的过滤技术的发展现状,重点研究该领域内的一些新兴过滤技术.在综合比较了一系列的过滤技术的优缺点之后,分析结果表明基于规则的方法和贝叶斯方法是最有潜力的过滤技术.     

异形结构施工总承包项目中智慧建造技术的综合应用—景德镇御窑博物馆项目

智慧建造的特点就在于依靠IT技术、云技术、新型建造设备等传统建造不具备的资源,达到减少重复性人力劳动的目的,使建造过程处于智能技术的精准控制下,解决了人力难以甚至无法达到的高效建造模式。在位于江西省景德镇市的景德镇御窑博物馆项目中,中建一局团队利用了无人机、Hololens全息眼镜、智能放样机器人以及三维激光扫描仪等智能建造设备,整合出了一套质量控制全过程全过程质量控制的解决方案。     

一氧化氮对采后大五星枇杷常温贮藏下品质的影响

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Genome-Wide Identification and Expression Analysis of Fatty Acid Desaturase (FAD) Genes in Camelina sativa (L.) Crantz

Camelina sativa (L.) Crantz is an indispensable oilseed crop, and its seeds contain many unsaturated fatty acids. FAD (fatty acid desaturase) regulates the synthesis of unsaturated fatty acids. In this research, we performed CsFAD gene family analysis and identified 24 CsFAD genes in Camelina, which were unevenly distributed on 14 of the 19 total chromosomes. Phylogenetic analysis showed that CsFAD includes four subfamilies, supported by the conserved structures and motifs of CsFAD genes. In addition, we investigated the expression patterns of the FAD family in the different tissues of Camelina. We found that CsFAD family genes were all expressed in the stem, and CsFAD2-2 was highly expressed in the early stage of seed development. Moreover, during low temperature (4 °C) stress, we identified that the expression level of CsFAD2-2 significantly changed. By observing the transient expression of CsFAD2-2 in Arabidopsis protoplasts, we found that CsFAD2-2 was located on the nucleus. Through the detection and analysis of fatty acids, we prove that CsFAD2-2 is involved in the synthesis of linolenic acid (C18:3). In conclusion, we identified CsFAD2-2 through the phylogenetic analysis of the CsFAD gene family and further determined the fatty acid content to find that CsFAD2-2 is involved in fatty acid synthesis in Camelina.     

The Integration of Genome-Wide Association Study and Homology Analysis to Explore the Genomic Regions and Candidate Genes for Panicle-Related Traits in Foxtail Millet

Panicle traits are important factors affecting yield, and their improvement has long been a critical goal in foxtail millet breeding. In order to understand the genetic basis of panicle formation, a large-scale genome-wide association study (GWAS) was performed in this study for six panicle-related traits based on 706,646 high-polymorphism SNP loci in 407 accessions. As a result, 87 quantitative trait loci (QTL) regions with a physical distance of less than 100 kb were detected to be associated with these traits in three environments. Among them, 27 core regions were stably detected in at least two environments. Based on rice–foxtail millet homologous comparison, expression, and haplotype analysis, 27 high-confidence candidate genes in the QTL regions, such as Si3g11200 (OsDER1), Si1g27910 (OsMADS6), Si7g27560 (GS5), etc., affected panicle-related traits by involving multiple plant growth regulator pathways, a photoperiod response, as well as panicle and grain development. Most of these genes showed multiple effects on different panicle-related traits, such as Si3g11200 affecting all six traits. In summary, this study clarified a strategy based on the integration of GWAS, a homologous comparison, and haplotype analysis to discover the genomic regions and candidate genes for important traits in foxtail millet. The detected QTL regions and candidate genes could be further used for gene clone and marker-assisted selection in foxtail millet breeding.     

C45100型液压机液压系统性能定性分析

定性地分析了Ｃ４５１００型液压机液压系统的工作性能;重点分析了承受工作负载较大、对压制成型起关键作用的慢下到保压段,侧重各工况流量、系统压力损失及热平衡分析。定量地分析计算了液压系统工作周期内的雷诺数。