目的了解国外老年人居家照护研究的现状,探讨近年来国外老年居家照护研究的热点和发展趋势,为我国老年人居家照护提供参考。方法计算机检索Web of Science核心合集数据库,获取2012-2022年国外老年居家照护相关的文献,采用CiteSpace 5.8...目的了解国外老年人居家照护研究的现状,探讨近年来国外老年居家照护研究的热点和发展趋势,为我国老年人居家照护提供参考。方法计算机检索Web of Science核心合集数据库,获取2012-2022年国外老年居家照护相关的文献,采用CiteSpace 5.8.R3对其进行可视化分析。结果最终纳入文献1419篇,2012-2018年国外老年居家照护领域发文量呈逐渐上升趋势,至2018年发文量达到峰值,2019-2022年发文量呈缓慢下降趋势。国外关于老年人居家照护的研究主要集中在美国、加拿大和瑞士,发文前3位的研究机构为卡罗林斯卡学院、奥斯陆大学和多伦多大学;国外居家照护研究重点为居家照护模式,重点关注人群为衰弱老人,常用的研究方法为随机对照试验、系统评价及调查研究。结论国外老年人居家照护研究相对成熟、平稳且研究视角较为开阔,但近几年热度有下降的趋势。研究主要集中在老年人居家照护模式、身心健康管理和多维度的健康需求3个方面,我国研究者可借鉴国际的成熟经验,并结合我国文化背景进行研究,以促进我国老年居家照护的发展。展开更多
目的运用数据挖掘技术,探讨耳穴贴压治疗高血压病的选穴规律。方法检索中国知网、万方、维普、中国生物医学文献服务系统、PubMed、Web of Science数据库中自建库至2022年8月30日有关耳穴贴压治疗高血压病的相关研究,利用SPSS 26.0、SPS...目的运用数据挖掘技术,探讨耳穴贴压治疗高血压病的选穴规律。方法检索中国知网、万方、维普、中国生物医学文献服务系统、PubMed、Web of Science数据库中自建库至2022年8月30日有关耳穴贴压治疗高血压病的相关研究,利用SPSS 26.0、SPSS Modeler 18.0软件行数据挖掘分析。结果最终纳入141篇文献,共涉及耳穴56个,高频穴位分别为神门、降压沟、心、肝、肾,高频次证型为肝阳上亢证、阴虚阳亢证、痰湿壅盛证、肝火亢盛证,最强关联耳穴配伍依次为神门-降压沟、肝-心、神门-心、心-肝。结论耳穴贴压治疗高血压病常用穴位为神门、降压沟、心、肝、肾;临床选穴多遵循传统医学与现代医学相结合、脏腑辨证配穴、临床经验取穴规律。展开更多
Permanent magnet synchronous motor(PMSM)speed control systems with conventional linear active disturbance rejection control(CLADRC)strategy encounter issues regarding the coupling between dynamic response and disturba...Permanent magnet synchronous motor(PMSM)speed control systems with conventional linear active disturbance rejection control(CLADRC)strategy encounter issues regarding the coupling between dynamic response and disturbance suppression and have poor performance in suppressing complex nonlinear disturbances.In order to address these issues,this paper proposes an improved two-degree-of-freedom LADRC(TDOF-LADRC)strategy,which can enhance the disturbance rejection performance of the system while decoupling entirely the system's dynamic and anti-disturbance performance to boost the system robustness and simplify controller parameter tuning.PMSM models that consider total disturbances are developed to design the TDOF-LADRC speed controller accurately.Moreover,to evaluate the control performance of the TDOF-LADRC strategy,its stability is proven,and the influence of each controller parameter on the system control performance is analyzed.Based on it,a comparison is made between the disturbance observation ability and anti-disturbance performance of TDOF-LADRC and CLADRC to prove the superiority of TDOF-LADRC in rejecting disturbances.Finally,experiments are performed on a 750 W PMSM experimental platform,and the results demonstrate that the proposed TDOF-LADRC exhibits the properties of two degrees of freedom and improves the disturbance rejection performance of the PMSM system.展开更多
BACKGROUND Prolonged postoperative ileus(PPOI)delays the postoperative recovery of gastrointestinal function in patients with gastric cancer(GC),leading to longer hospitalization and higher healthcare expenditure.Howe...BACKGROUND Prolonged postoperative ileus(PPOI)delays the postoperative recovery of gastrointestinal function in patients with gastric cancer(GC),leading to longer hospitalization and higher healthcare expenditure.However,effective monitoring of gastrointestinal recovery in patients with GC remains challenging because of AIM To explore the risk factors for delayed postoperative bowel function recovery and evaluate bowel sound indicators collected via an intelligent auscultation system to guide clinical practice.METHODS This study included data from 120 patients diagnosed with GC who had undergone surgical treatment and postoperative bowel sound monitoring in the Department of General Surgery II at Shaanxi Provincial People's Hospital between January 2019 and January 2021.Among them,PPOI was reported in 33 cases.The patients were randomly divided into the training and validation cohorts.Significant variables from the training cohort were identified using univariate and multivariable analyses and were included in the model.RESULTS The analysis identified six potential variables associated with PPOI among the included participants.The incidence rate of PPOI was 27.5%.Age≥70 years,cTNM stage(Ⅰ and Ⅳ),preoperative hypoproteinemia,recovery time of bowel sounds(RTBS),number of bowel sounds(NBS),and frequency of bowel sounds(FBS)were independent risk factors for PPOI.The Bayesian model demonstrated good performance with internal validation:Training cohort[area under the curve(AUC)=0.880,accuracy=0.823,Brier score=0.139]and validation cohort(AUC=0.747,accuracy=0.690,Brier score=0.215).The model showed a good fit and calibration in the decision curve analysis,indicating a significant net benefit.CONCLUSION PPOI is a common complication following gastrectomy in patients with GC and is associated with age,cTNM stage,preoperative hypoproteinemia,and specific bowel sound-related indices(RTBS,NBS,and FBS).To facilitate early intervention and improve patient outcomes,clinicians should consider these factors,optimize preoperative nutritional status,and implement routine postoperative bowel sound monitoring.This study introduces an accessible machine learning model for predicting PPOI in patients with GC.展开更多
文摘目的了解国外老年人居家照护研究的现状,探讨近年来国外老年居家照护研究的热点和发展趋势,为我国老年人居家照护提供参考。方法计算机检索Web of Science核心合集数据库,获取2012-2022年国外老年居家照护相关的文献,采用CiteSpace 5.8.R3对其进行可视化分析。结果最终纳入文献1419篇,2012-2018年国外老年居家照护领域发文量呈逐渐上升趋势,至2018年发文量达到峰值,2019-2022年发文量呈缓慢下降趋势。国外关于老年人居家照护的研究主要集中在美国、加拿大和瑞士,发文前3位的研究机构为卡罗林斯卡学院、奥斯陆大学和多伦多大学;国外居家照护研究重点为居家照护模式,重点关注人群为衰弱老人,常用的研究方法为随机对照试验、系统评价及调查研究。结论国外老年人居家照护研究相对成熟、平稳且研究视角较为开阔,但近几年热度有下降的趋势。研究主要集中在老年人居家照护模式、身心健康管理和多维度的健康需求3个方面,我国研究者可借鉴国际的成熟经验,并结合我国文化背景进行研究,以促进我国老年居家照护的发展。
文摘Permanent magnet synchronous motor(PMSM)speed control systems with conventional linear active disturbance rejection control(CLADRC)strategy encounter issues regarding the coupling between dynamic response and disturbance suppression and have poor performance in suppressing complex nonlinear disturbances.In order to address these issues,this paper proposes an improved two-degree-of-freedom LADRC(TDOF-LADRC)strategy,which can enhance the disturbance rejection performance of the system while decoupling entirely the system's dynamic and anti-disturbance performance to boost the system robustness and simplify controller parameter tuning.PMSM models that consider total disturbances are developed to design the TDOF-LADRC speed controller accurately.Moreover,to evaluate the control performance of the TDOF-LADRC strategy,its stability is proven,and the influence of each controller parameter on the system control performance is analyzed.Based on it,a comparison is made between the disturbance observation ability and anti-disturbance performance of TDOF-LADRC and CLADRC to prove the superiority of TDOF-LADRC in rejecting disturbances.Finally,experiments are performed on a 750 W PMSM experimental platform,and the results demonstrate that the proposed TDOF-LADRC exhibits the properties of two degrees of freedom and improves the disturbance rejection performance of the PMSM system.
基金Supported by Key Research and Development Program of Shaanxi,No.2020GXLH-Y-019,No.2022KXJ-141,and No.2023-GHYB-11Innovation Capability Support Program of Shaanxi,No.2019GHJD-14 and No.2021TD-40Science and Technology Program of Xi'an,No.23ZDCYJSGG0037-2022.
文摘BACKGROUND Prolonged postoperative ileus(PPOI)delays the postoperative recovery of gastrointestinal function in patients with gastric cancer(GC),leading to longer hospitalization and higher healthcare expenditure.However,effective monitoring of gastrointestinal recovery in patients with GC remains challenging because of AIM To explore the risk factors for delayed postoperative bowel function recovery and evaluate bowel sound indicators collected via an intelligent auscultation system to guide clinical practice.METHODS This study included data from 120 patients diagnosed with GC who had undergone surgical treatment and postoperative bowel sound monitoring in the Department of General Surgery II at Shaanxi Provincial People's Hospital between January 2019 and January 2021.Among them,PPOI was reported in 33 cases.The patients were randomly divided into the training and validation cohorts.Significant variables from the training cohort were identified using univariate and multivariable analyses and were included in the model.RESULTS The analysis identified six potential variables associated with PPOI among the included participants.The incidence rate of PPOI was 27.5%.Age≥70 years,cTNM stage(Ⅰ and Ⅳ),preoperative hypoproteinemia,recovery time of bowel sounds(RTBS),number of bowel sounds(NBS),and frequency of bowel sounds(FBS)were independent risk factors for PPOI.The Bayesian model demonstrated good performance with internal validation:Training cohort[area under the curve(AUC)=0.880,accuracy=0.823,Brier score=0.139]and validation cohort(AUC=0.747,accuracy=0.690,Brier score=0.215).The model showed a good fit and calibration in the decision curve analysis,indicating a significant net benefit.CONCLUSION PPOI is a common complication following gastrectomy in patients with GC and is associated with age,cTNM stage,preoperative hypoproteinemia,and specific bowel sound-related indices(RTBS,NBS,and FBS).To facilitate early intervention and improve patient outcomes,clinicians should consider these factors,optimize preoperative nutritional status,and implement routine postoperative bowel sound monitoring.This study introduces an accessible machine learning model for predicting PPOI in patients with GC.
