This paper studies the factors that affect the safe full heading of machine-transplanted rice seedlings in the temperate and cool ricegrowing areas,and explores the influence of machine-transplanted rice seedling vari...This paper studies the factors that affect the safe full heading of machine-transplanted rice seedlings in the temperate and cool ricegrowing areas,and explores the influence of machine-transplanted rice seedling varieties,seedling age,nitrogen fertilizer application rate and management on the safe full heading of machine-transplanted rice seedlings. Results show that for the mechanized production in the temperate and cool rice-growing areas,we should select the mid-early maturity cold-resistant varieties with growth period of not exceeding 180 d,control the seedling age to be 30- 35 d and total amount of pure nitrogen to be not more than 300 kg / ha,and moderately reduce the nitrogen fertilizer postponing ratio. Under this condition,we can achieve safe full heading of machine-transplanted rice seedlings and ensure the yield.展开更多
The wellbore stability of a vertical well through the sandstone reservoir layers of the Asmari oil-bearing formation in south-west Iran is investigated.The safe drilling-fluid density range for maintaining wellbore st...The wellbore stability of a vertical well through the sandstone reservoir layers of the Asmari oil-bearing formation in south-west Iran is investigated.The safe drilling-fluid density range for maintaining wellbore stability is determined and simulated using FLAC3 D software and a finite volume model established with drilled strata geomechanical features.The initiation of plastic condition is used to determine the safe mud weight window(SMWW)in specific sandstone layers.The effects of rock strength parameters,major stresses around the wellbore and pore pressure on the SMWW are investigated for this wellbore.Sensitivity analysis reveals that a reduction in cohesion and internal friction angle values leads to a significant narrowing of the SMWW.On the other hand,the reduction of pore pressure and the ratio between maximum and minimum horizontal stresses causes the SMWW to widen significantly.The ability to readily quantify changes in SMWW indicates that the developed model is suitable as a well planning and monitoring tool.展开更多
目的针对急危重症患儿进行院际安全转运,探讨急危重症患儿在院际安全转运过程中的安全隐患以及影响因素。方法选取于泉州市儿童医院2021年2月—2022年12月重症医学科儿科重症监护病房(pediatric intensive care unit,PICU)进行院际转运...目的针对急危重症患儿进行院际安全转运,探讨急危重症患儿在院际安全转运过程中的安全隐患以及影响因素。方法选取于泉州市儿童医院2021年2月—2022年12月重症医学科儿科重症监护病房(pediatric intensive care unit,PICU)进行院际转运的急危重症患儿486例,其中2021年164例、2022年322例。以患儿转运病种的统计、转运中不良事件的发生率、原地抢救次数以及转运后入院治疗及转归情况进行记录与统计学分析,比较2021年与2022年院际安全转运情况,对其进行院际安全转运过程中的安全隐患与影响因素进行分析。结果2021年组与2022年组急危重症患儿的院际安全转运比较,两组患儿的转运病种差异无统计学意义(P>0.05);但转运过程不良事件发生比较,差异有统计学意义(P<0.05),2021年组与2022年组发生率分别为50.00%、7.76%,以2022年组较低。2021年组患儿原地抢救率为13.41%,而2022年组为3.42%(P<0.05),两组患儿在院际转运后转归情况均良好。结论急危重症患儿在院际安全转运过程中受外在因素和内在因素的影响,存在一定的安全隐患,但基本转运情况良好,可进一步通过安全风险控制提高院际转运的安全性。展开更多
背景随着人口老龄化程度日益加深,老年人多病共存和多重用药现象明显增加,易发生潜在不适当用药。潜在不适当用药与不良健康结局相关。目的系统评价中国社区老年人潜在不适当用药发生率及相关因素,旨在为制定干预策略提供依据。方法于2...背景随着人口老龄化程度日益加深,老年人多病共存和多重用药现象明显增加,易发生潜在不适当用药。潜在不适当用药与不良健康结局相关。目的系统评价中国社区老年人潜在不适当用药发生率及相关因素,旨在为制定干预策略提供依据。方法于2022年6月,检索中国知网、维普中文科技期刊全文数据库、万方数据知识服务平台、中国生物医学文献数据库、PubMed、EmBase和Web of Science,获取有关中国社区老年人潜在不适当用药发生率及相关因素的文献,检索时限均为建库至2022年6月。由2名研究者独立筛选文献、提取数据后,采用美国卫生保健质量和研究机构推荐的横断面研究质量评价工具评价文献质量。采用Stata 12.0软件进行Meta分析。结果共纳入24篇文献,其中2篇文献质量为高,22篇文献质量中等。Meta分析结果显示,中国社区老年人潜在不适当用药发生率为34.8%[95%CI(31.3%,38.3%)],其发生潜在不适当用药的相关因素有年龄≥75岁[OR(95%CI)=1.261(1.074,1.481)]、合并多病(≥5种)[OR(95%CI)=3.287(1.405,7.691)]、用药数量≥5种[OR(95%CI)=1.800(1.305,2.481)]和用药数量≥10种[OR(95%CI)=4.380(2.612,7.347)]。结论中国社区老年人潜在不适当用药发生率较高,高龄、合并多病、用药数量多是社区老年人发生潜在不适当用药的危险因素,应重视对具有上述特征的社区老年人群潜在不适当用药的预防和干预管理。展开更多
文摘This paper studies the factors that affect the safe full heading of machine-transplanted rice seedlings in the temperate and cool ricegrowing areas,and explores the influence of machine-transplanted rice seedling varieties,seedling age,nitrogen fertilizer application rate and management on the safe full heading of machine-transplanted rice seedlings. Results show that for the mechanized production in the temperate and cool rice-growing areas,we should select the mid-early maturity cold-resistant varieties with growth period of not exceeding 180 d,control the seedling age to be 30- 35 d and total amount of pure nitrogen to be not more than 300 kg / ha,and moderately reduce the nitrogen fertilizer postponing ratio. Under this condition,we can achieve safe full heading of machine-transplanted rice seedlings and ensure the yield.
文摘The wellbore stability of a vertical well through the sandstone reservoir layers of the Asmari oil-bearing formation in south-west Iran is investigated.The safe drilling-fluid density range for maintaining wellbore stability is determined and simulated using FLAC3 D software and a finite volume model established with drilled strata geomechanical features.The initiation of plastic condition is used to determine the safe mud weight window(SMWW)in specific sandstone layers.The effects of rock strength parameters,major stresses around the wellbore and pore pressure on the SMWW are investigated for this wellbore.Sensitivity analysis reveals that a reduction in cohesion and internal friction angle values leads to a significant narrowing of the SMWW.On the other hand,the reduction of pore pressure and the ratio between maximum and minimum horizontal stresses causes the SMWW to widen significantly.The ability to readily quantify changes in SMWW indicates that the developed model is suitable as a well planning and monitoring tool.
文摘目的针对急危重症患儿进行院际安全转运,探讨急危重症患儿在院际安全转运过程中的安全隐患以及影响因素。方法选取于泉州市儿童医院2021年2月—2022年12月重症医学科儿科重症监护病房(pediatric intensive care unit,PICU)进行院际转运的急危重症患儿486例,其中2021年164例、2022年322例。以患儿转运病种的统计、转运中不良事件的发生率、原地抢救次数以及转运后入院治疗及转归情况进行记录与统计学分析,比较2021年与2022年院际安全转运情况,对其进行院际安全转运过程中的安全隐患与影响因素进行分析。结果2021年组与2022年组急危重症患儿的院际安全转运比较,两组患儿的转运病种差异无统计学意义(P>0.05);但转运过程不良事件发生比较,差异有统计学意义(P<0.05),2021年组与2022年组发生率分别为50.00%、7.76%,以2022年组较低。2021年组患儿原地抢救率为13.41%,而2022年组为3.42%(P<0.05),两组患儿在院际转运后转归情况均良好。结论急危重症患儿在院际安全转运过程中受外在因素和内在因素的影响,存在一定的安全隐患,但基本转运情况良好,可进一步通过安全风险控制提高院际转运的安全性。
文摘背景随着人口老龄化程度日益加深,老年人多病共存和多重用药现象明显增加,易发生潜在不适当用药。潜在不适当用药与不良健康结局相关。目的系统评价中国社区老年人潜在不适当用药发生率及相关因素,旨在为制定干预策略提供依据。方法于2022年6月,检索中国知网、维普中文科技期刊全文数据库、万方数据知识服务平台、中国生物医学文献数据库、PubMed、EmBase和Web of Science,获取有关中国社区老年人潜在不适当用药发生率及相关因素的文献,检索时限均为建库至2022年6月。由2名研究者独立筛选文献、提取数据后,采用美国卫生保健质量和研究机构推荐的横断面研究质量评价工具评价文献质量。采用Stata 12.0软件进行Meta分析。结果共纳入24篇文献,其中2篇文献质量为高,22篇文献质量中等。Meta分析结果显示,中国社区老年人潜在不适当用药发生率为34.8%[95%CI(31.3%,38.3%)],其发生潜在不适当用药的相关因素有年龄≥75岁[OR(95%CI)=1.261(1.074,1.481)]、合并多病(≥5种)[OR(95%CI)=3.287(1.405,7.691)]、用药数量≥5种[OR(95%CI)=1.800(1.305,2.481)]和用药数量≥10种[OR(95%CI)=4.380(2.612,7.347)]。结论中国社区老年人潜在不适当用药发生率较高,高龄、合并多病、用药数量多是社区老年人发生潜在不适当用药的危险因素,应重视对具有上述特征的社区老年人群潜在不适当用药的预防和干预管理。