检索结果-南通市图书馆

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

蔬菜穴盘育苗播种机清种装置的设计与试验

华南农业大学学报 2024年第1期45卷 116-126页

作者：杨文彩田梓园潘吴建赵静张海东李贵荣云南农业大学机电工程学院云南昆明650201 宁波财经学院浙江宁波315175

【目的】针对蔬菜穴盘育苗播种机现有清种装置清种效果不好,导致的充种合格率低、重播率高问题,设计集机械式、气吹式、电控式为一体的清种装置。【方法】结合运动学及动力学理论对三级清种装置的结构进行设计;采用Ansys软件中Fluent模... 详细信息

【目的】针对蔬菜穴盘育苗播种机现有清种装置清种效果不好,导致的充种合格率低、重播率高问题,设计集机械式、气吹式、电控式为一体的清种装置。【方法】结合运动学及动力学理论对三级清种装置的结构进行设计;采用Ansys软件中Fluent模块对气吹式清种装置的不同进气口和出气口结构中的气流稳定性进行分析;在理论分析和仿真分析的基础上选取排种器转速、排种器负压、清种装置正压、种子直径为试验因素,结合农艺要求选取单粒充种合格率、重播率为试验指标开展四因素三水平二次回归正交试验。根据试验数据得出最佳参数组合。【结果】由仿真分析得出,中间端进气圆弧式喷嘴气吹式清种结构清种效果最好。由台架试验得到排种最佳参数组合,即在排种器转速为0.17 r/s、种子直径为1.5 mm、排种器负压为0.6 kPa、气吹式清种装置正压为0.3 kPa时,平均单粒充种合格率为95.31%,平均重播率为0.2%。【结论】本文设计的清种装置满足了蔬菜播种农艺要求,可以有效提升充种合格率、降低重播率,为生产实际提供理论指导。

关键词：蔬菜穴盘育苗播种机清种装置二次回归正交试验

在线全文

学校读者我要写书评

暂无评论

糖尿病视网膜病变患者的护理研究进展

中国医药科学 2024年第3期14卷 60-63页

作者：程冬生李桂荣彭婉琳李翠右江民族医学院护理学院广西百色533000 广西壮族自治区人民医院眼科广西南宁530021 广西中医药大学护理学院广西南宁530200

糖尿病视网膜病变是糖尿病常见的慢性并发症之一,可能导致严重的视力障碍甚至失明。对糖尿病视网膜病变患者进行有效的护理管理对于预防其发生发展至关重要,对于患者来说将血糖水平控制在正常范围内,并培养自我管理能力是居家血糖管理... 详细信息

糖尿病视网膜病变是糖尿病常见的慢性并发症之一,可能导致严重的视力障碍甚至失明。对糖尿病视网膜病变患者进行有效的护理管理对于预防其发生发展至关重要,对于患者来说将血糖水平控制在正常范围内,并培养自我管理能力是居家血糖管理的关键组成部分。此外,指导患者制订均衡饮食计划、定期运动和管理药物依从性能够显著延缓糖尿病视网膜病变的发生发展。本文全面综述了国内外糖尿病视网膜病变的危险因素和护理措施,旨在为临床护理人员在为糖尿病视网膜病变患者构建个性化护理方案时提供参考依据。

关键词：糖尿病视网膜病变糖尿病血糖护理

“互联网+护理服务”在糖尿病视网膜病变患者疾病管理中的应用进展

在线全文

学校读者我要写书评

暂无评论

现代医药卫生 2024年第3期40卷 459-462页

作者：程冬生(综述) 彭婉琳李翠李桂荣(审校) 右江民族医学院护理学院广西百色533000 广西中医药大学护理学院广西南宁530200 广西壮族自治区人民医院眼科/广西眼健康重点实验室/广西眼部与相关全身疾病人工智能筛查技术重点实验室/广西医学科学院眼科疾病医学研究所广西南宁530021

糖尿病视网膜病变(DR)是糖尿病重要并发症之一,“互联网+护理服务”作为一种新型医疗模式在护理领域迅速发展,为患者提供了更加便捷、精准的医疗服务,在加强疾病管理方面发挥着至关重要的作用。该文综述了近年来的相关研究成果,分析了... 详细信息

糖尿病视网膜病变(DR)是糖尿病重要并发症之一,“互联网+护理服务”作为一种新型医疗模式在护理领域迅速发展,为患者提供了更加便捷、精准的医疗服务,在加强疾病管理方面发挥着至关重要的作用。该文综述了近年来的相关研究成果,分析了“互联网+护理服务”在DR患者疾病管理方面的进展,包括在线教育的实施、健康随访、疾病风险预测与筛查等方面。旨在为“互联网+护理服务”在DR患者中的发展及其在临床应用提供参考依据。

关键词：互联网+护理服务糖尿病视网膜病变疾病管理综述

水田动力底盘逆向建模与质心验证——基于Geomagic Design X

在线全文

学校读者我要写书评

暂无评论

农机化研究 2024年第10期46卷 248-253页

作者：何剑飞曾志浩郭梓游李贵蓉钟文能钟顺王在满李庆华南农业大学基础实验与实践训练中心广州510642 华南农业大学工程学院广州510642

针对目前农业机械仿真和优化模型精度不高的问题,提出了一种构建精确模型的逆向建模方法。应用光学扫描仪采集点云数据,基于Geomagic Design X处理点云数据并重构零部件模型,在SolidWorks中完成水田动力底盘的装配。以VP6D-CQ型水田动... 详细信息

针对目前农业机械仿真和优化模型精度不高的问题,提出了一种构建精确模型的逆向建模方法。应用光学扫描仪采集点云数据,基于Geomagic Design X处理点云数据并重构零部件模型,在SolidWorks中完成水田动力底盘的装配。以VP6D-CQ型水田动力底盘为例,将测得的实际质心位置与所建的模型质心位置进行比较,并对提出的逆向建模方法进行了试验验证以及误差分析。结果表明:总质量、x坐标、y坐标、z坐标的误差值分别为4.55%、3.62%、2.23%、4.81%,误差值均在5%内。此方法可构建准确的三维模型,为后续仿真优化数据精确性奠定了基础,与传统的研发相比较,可缩短农业机械研发周期、降低设计成本。

关键词：水田动力底盘逆向建模质心验证 Geomagic Design X 数字样机

维普期刊数据库博看期刊

Studies on Factors Affecting Survival Rate of Micro-grafting in Vitro in Persimmon

在线全文

学校读者我要写书评

暂无评论

Agricultural Biotechnology 2018年第3期7卷 46-48页

作者： Ruijin ZHOU Xiaona ZHANG Gaozhan HUAI guirong li Huiling HU School of Horticulture and Landscape Architecture Henan Institute of Science and Technology

Factors affecting micro-graft in vitro were studied in persimmon lines of Jiro,Nishimarawase,Zenjiomaru,Okitsu-20,Xinqiu,Maekawa Jiro and Youhou. The results indicated that higher survival rate was obtained when using the plantlets sub-cultured for 30 d with vigorous adventitious shoots. The best moisturepreserving material was the tampon ＋ parafilm. The optimal medium was（ 1/2 N） MS ＋ BA 3. 0 mg/L ＋ IAA 0. 1 mg/L ＋ sugar 30. 0 g/L ＋ agar 6. 0 g/L,and the graft survival rate was up to 40%.

关键词： Persimmon Micro-grafting Survival rate

Identification of transient receptor potential channel genes and functional characterization of TRPA1 in Spodoptera frugiperda

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

Journal of Integrative Agriculture 2024年第6期23卷 1994-2005页

作者： Yutong Zhang Hangwei liu Song Cao Bin li Yang liu guirong Wang State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Institute of Evolution and Ecology School of Life SciencesCentral China Normal UniversityWuhan 430079China

Spodoptera frugiperda is a highly destructive pest that has become a global problem due to its robust reproductive and migratory capabilities.Transient receptor potential(TRP)channels,which constitute a vast ion channel family,play pivotal roles in sensing the external environment and maintaining internal homeostasis in insects.TRP channels have been widely investigated for their critical roles in regulating various insect behaviors in recent years.In this study,we identified 15 TRP gene loci encoding 26 transcripts in the genome of S.frugiperda and analyzed their expression profiles at different developmental stages.The results revealed that S.frugiperda possesses four TRPC genes,six TRPA genes,one TRPM gene,two TRPV genes,one TRPN gene,and one TRPML gene,while a canonical TRPP is absent.Moreover,the SfruTRPA1 was functionally characterized using the Xenopus oocyte expression system.The results showed that SfruTRPA1 is activated by temperature increases from 20 to 45℃,and there is no significant desensitization after repeated stimuli within the same temperature range.Additionally,SfruTRPA1 is activated by certain natural chemicals,including allyl isothiocyanate(AITC)and cinnamaldehyde(CA).These findings provide valuable insights to the TRP genes in S.frugiperda.

关键词： Spodoptera frugiperda transient receptor potential channel expression profile TRPA1 Xenopus oocyte

In-situ fabrication of particulate reinforced aluminum matrix composites under high-frequency pulsed electromagnetic field

在线全文

学校读者我要写书评

暂无评论

Journal of University of Science and Technology Beijing 2007年第5期14卷 460-463页

作者： guirong li Yutao Zhao Qixun Dai Hongjie Zhang Hongming Wang School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 China

Pulsed magnetic field is generated when imposing pulse signal on high-frequency magnetic field. Distribution of the inner magnetic intensity in induction coils tends to be uniform. Furthermore oscillation and disturbance phenomena appear in the melt. In. situ Al2O3 and Al3Zr particulate reinforced aluminum matrix composites have been synthesized by direct melt reaction using AlZr（CO3）2 components under a foreign field. The size of reinforced particulates is 2-3 μm. They are well distributed in the matrix. Thermodynamic and kinetic analysis show that high-frequency pulsed magnetic field accelerates heat and mass transfer processes and improves the kinetic condition of in-situ fabrication.

关键词： in-situ synthesis aluminum matrix composites pulsed magnetic field thermodynamics kinetics

Assessing the conservation impact of Chinese indigenous chicken populations between ex-situ and in-situ using genome-wide SNPs

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第3期23卷 975-987页

作者： Wenting li Chaoqun Gao Zhao Cai Sensen Yan Yanru Lei Mengya Wei guirong Sun Yadong Tian Kejun Wang Xiangtao Kang College of Animal Science and Technology Henan Agricultural UniversityZhengzhou 450002China The Shennong Laboratory Zhengzhou 450002China

Conservation programs require rigorous evaluation to ensure the preservation of genetic diversity and viability of conservation populations. In this study, we conducted a comparative analysis of two indigenous Chinese chicken breeds, Gushi and Xichuan black-bone, using whole-genome SNPs to understand their genetic diversity, track changes over time and population structure. The breeds were divided into five conservation populations(GS1, 2010, ex-situ;GS2, 2019, ex-situ;GS3, 2019, in-situ;XB1, 2010, in-situ;and XB2, 2019, in-situ) based on conservation methods and generations. The genetic diversity indices of three conservation populations of Gushi chicken showed consistent trends, with the GS3 population under in-situ strategy having the highest diversity and GS2 under ex-situ strategy having the lowest. The degree of inbreeding of GS2 was higher than that of GS1 and GS3. Conserved populations of Xichuan black-bone chicken showed no obvious changes in genetic diversity between XB1 and XB2. In terms of population structure, the GS3 population were stratified relative to GS1 and GS2. According to the conservation priority, GS3 had the highest contribution to the total gene and allelic diversity in GS breed, whereas the contribution of XB1 and XB2 were similar. We also observed that the genetic diversity of GS2 was lower than GS3, which were from the same generation but under different conservation programs(in-situ and ex-situ). While XB1 and XB2 had similar levels of genetic diversity. Overall, our findings suggested that the conservation programs performed in ex-situ could slow down the occurrence of inbreeding events, but could not entirely prevent the loss of genetic diversity when the conserved population size was small, while in-situ conservation populations with large population size could maintain a relative high level of genetic diversity.

关键词： genome-wide SNPs conservation genetic diversity ex-situ in-situ

Study on Precursory Features of the Lop M_S6. 0 Earthquake Based on GPS Continuous Observation Data and Mobile Gravity Data

在线全文

学校读者我要写书评

暂无评论

Earthquake Research in China 2015年第3期29卷 386-393页

作者： Zhu Zhiguo li guirong School of Earth Sciences and Resources Chang'an University Earthquake Administration of Xinjiang Uygur Autonomous Region

Through calculating and analyzing of GPS continuous observation data and mobile gravity data,the study results from the data are as follows.( 1) The different movement rate of the fault ends provides conditions for stress accumulation.( 2) The high value zone of gravity anomaly appeared in the monitoring area before the earthquake,and gravity variation contour lines are parallel to the strike of fault; and the process of enhancingweakening-enhancing appeared in the regional gravity field before earthquake.

关键词：地震发生重力数据观测数据前兆特征 GPS 区域重力场应力积累运动速率