针对当前GSM-R车载空口监测面临缺乏分组域和无线电频谱监测,以及数据格式不统一等问题,通过对既有车载侧和基站侧的空口监测技术的深化研究,采用高速移动跟踪、软件无线电、动态流控和数据分类处理技术,设计开发GSM-R车载空口综合监测...针对当前GSM-R车载空口监测面临缺乏分组域和无线电频谱监测,以及数据格式不统一等问题,通过对既有车载侧和基站侧的空口监测技术的深化研究,采用高速移动跟踪、软件无线电、动态流控和数据分类处理技术,设计开发GSM-R车载空口综合监测系统(简称空口监测系统)。从系统组成、功能实现、关键技术、应用案例等方面展开介绍,说明采集设备、频谱监测、电路域业务监测和分组域业务监测组成、定义、实现和应用。空口监测系统是补强G S M-R网络空口运用质量和性能监测的重要手段,可有效提升铁路列控业务故障分析整治和隐患排查能力,具有广阔的实际应用价值和前景。展开更多
Catalytic syntheses of silaoxycarbocyclics from an interrupted Catellani reaction of 3-iodochromones with bridged olefins and octamethyl-1,4-dioxacyclohexasilane is described.This protocol involves the oxidative addit...Catalytic syntheses of silaoxycarbocyclics from an interrupted Catellani reaction of 3-iodochromones with bridged olefins and octamethyl-1,4-dioxacyclohexasilane is described.This protocol involves the oxidative addition of chromonyl-norbornyl-palladacycle generated through successive oxidative addition of Pd(0)to 3-iodochromones,migratory insertion of NBE and intramolecular ortho-C(sp^(2))-H activation to the tetrasilane,thus motivating a(4+6)annulation and ring expansion.The synthetic practicality of current strategy is further proved by the late-stage modification of pharmaceuticals and natural products,gram-scale experiments,as well as the transformations of functional groups of silaoxycarbocyclics.展开更多
In recent years,research on nursing interruptions has been conducted at various levels in emergency departments,intensive care units,hemodialysis centers,operating rooms,and sterilization and supply centers.Nursing in...In recent years,research on nursing interruptions has been conducted at various levels in emergency departments,intensive care units,hemodialysis centers,operating rooms,and sterilization and supply centers.Nursing interruptions are closely related to adverse nursing events,and interruptions in operating room nursing can significantly impact the success of a patient’s surgery.However,there is a lack of in-depth theoretical research on safety risk assessment and response decision-making by operating room nurses when faced with nursing interruptions.This article reviews the concept,current status,and impact of nursing interruptions in the operating room,analyzes the cognitive level,coping strategies,and negative emotions of operating room nurses,and elaborates on management strategies to provide references for research and management of nursing interruptions in the operating room.展开更多
BACKGROUND Gastric subepithelial lesions(SELs)are elevated lesions originating from the muscularis mucosa,submucosa,or muscularis propria,and may also include extraluminal lesions.For small SELs(less than 5 cm),comple...BACKGROUND Gastric subepithelial lesions(SELs)are elevated lesions originating from the muscularis mucosa,submucosa,or muscularis propria,and may also include extraluminal lesions.For small SELs(less than 5 cm),complete endoscopic excision is the preferred treatment.Endoscopic full-thickness resection(EFTR)has proven to be an effective approach.AIM To evaluate the efficacy of the interrupted closure technique compared to the traditional closure technique in EFTR for gastric SELs.METHODS This single-center,prospective,randomized controlled trial was conducted at a tertiary hospital from September 2023 to September 2024.A total of 90 patients who underwent EFTR for gastric SELs were randomly allocated to either the interrupted closure group(n=44)or the traditional closure group(n=46).RESULTS All patients had complete resection and wound closure without any severe postoperative complications.The incidence of intraoperative gas-related complications was significantly lower in the interrupted closure group than in the traditional closure group(2.27%vs 26.09%,P=0.001),demonstrating interrupted closure technique can reduce the incidence of gas-related issues.Statistical analysis revealed that the incidence of postoperative infection was significantly lower in the experimental group than in the control group(15.91%vs 41.30%,P=0.008).Additionally,the median duration of antibiotic use was lower in the experimental group(3.5 days vs 5 days,P=0.013).Abdominal pain levels on postoperative days 1 and 4 were also lower in the experimental group compared to the control group(P<0.001).CONCLUSION The interrupted closure technique in EFTR for treating gastric SELs is safe and effective,reducing the incidence of intraoperative gas complications and postoperative infections.展开更多
随着通信技术的不断发展,基于IP的Gb数据传输(简称Gb over IP)成为GSM-R网络的研究焦点。重点围绕GSM-R系统中BSC/PCU设备以Gb over IP方式接入核心网的方案开展研究,针对BSC/PCU与核心网设备异地设置时,BSC侧无法感知跨传输系统后链路...随着通信技术的不断发展,基于IP的Gb数据传输(简称Gb over IP)成为GSM-R网络的研究焦点。重点围绕GSM-R系统中BSC/PCU设备以Gb over IP方式接入核心网的方案开展研究,针对BSC/PCU与核心网设备异地设置时,BSC侧无法感知跨传输系统后链路中断,导致保护倒换机制未触发引起业务中断的问题,提出3种解决方案,并进行方案比选与优化,为GSM-R系统BSC/PCU设备以Gb over IP方式对接核心网方案提供操作指导及优化建议,以满足铁路移动通信系统多场景下的组网需求。展开更多
In the context of the Diagnosis Related Groups(DRGs)system,the orthopedic hospital implemented refined drug control to provide a pharmacological reference for promoting rational clinical drug use.A statistical analysi...In the context of the Diagnosis Related Groups(DRGs)system,the orthopedic hospital implemented refined drug control to provide a pharmacological reference for promoting rational clinical drug use.A statistical analysis was conducted on the hospital’s data from January to December 2021(prior to the implementation of control),focusing on the types of unreasonable prescriptions.A multi-dimensional analysis was also conducted to identify the underlying causes of inappropriate medication practices.Following this,refined drug control measures were introduced,and data from January to December 2022(post-control)were compared,examining factors such as the average drug cost,drug expenses for the IC29 diagnosis group,and the drug cost ratio.An interrupted time-series analysis was employed to evaluate the effects of these interventions.The results showed that after the implementation of refined drug control in the orthopedic department,significant reductions were observed in the average cost per patient,average drug cost per patient,drug cost ratio,cost consumption index,average length of hospital stay,and allocation ratio(P<0.05).In particular,the first month of control(January 2022)saw a marked decrease in average drug costs per patient by 1272.90 yuan(P<0.01),a reduction in the drug cost ratio by 0.98%,and a decline in drug costs for the IC29 diagnosis group by 616.79 yuan(P>0.05).Moreover,the rate of unreasonable inappropriate prescribing dropped dramatically from 40.48%in 2021 to 3.57%by December 2022.The refined control of drug use within the orthopedic hospital significantly improved the rationality of clinical prescribing practices,reduced the occurrence of adverse drug reactions,and enhanced patient adherence to prescribed treatments.These findings demonstrated considerable clinical value in promoting efficient and safe drug use.展开更多
The incremental capacity analysis(ICA)technique is notably limited by its sensitivity to variations in charging conditions,which constrains its practical applicability in real-world scenarios.This paper introduces an ...The incremental capacity analysis(ICA)technique is notably limited by its sensitivity to variations in charging conditions,which constrains its practical applicability in real-world scenarios.This paper introduces an ICA-compensation technique to address this limitation and propose a generalized framework for assessing the state of health(SOH)of batteries based on ICA that is applicable under differing charging conditions.This novel approach calculates the voltage profile under quasi-static conditions by subtracting the voltage increase attributable to the additional polarization effects at high currents from the measured voltage profile.This approach's efficacy is contingent upon precisely acquiring the equivalent impedance.To obtain the equivalent impedance throughout the batteries'lifespan while minimizing testing costs,this study employs a current interrupt technique in conjunction with a long short-term memory(LSTM)network to develop a predictive model for equivalent impedance.Following the derivation of ICA curves using voltage profiles under quasi-static conditions,the research explores two scenarios for SOH estimation:one utilizing only incremental capacity(IC)features and the other incorporating both IC features and IC sampling.A genetic algorithm-optimized backpropagation neural network(GABPNN)is employed for the SOH estimation.The proposed generalized framework is validated using independent training and test datasets.Variable test conditions are applied for the test set to rigorously evaluate the methodology under challenging conditions.These evaluation results demonstrate that the proposed framework achieves an estimation accuracy of 1.04%for RMSE and 0.90%for MAPE across a spectrum of charging rates ranging from 0.1 C to 1 C and starting SOCs between 0%and 70%,which constitutes a major advancement compared to established ICA methods.It also significantly enhances the applicability of conventional ICA techniques in varying charging conditions and negates the necessity for separate testing protocols for each charging scenario.展开更多
为解决传统铁路通信信号系统存在的实时性不足、可靠性较低等问题,提升铁路运输的安全性与效率,以铁路综合数字移动通信系统(global system for mobile communications-railway,GSM-R)为基础,对铁路通信信号系统的集成与优化方法展开分...为解决传统铁路通信信号系统存在的实时性不足、可靠性较低等问题,提升铁路运输的安全性与效率,以铁路综合数字移动通信系统(global system for mobile communications-railway,GSM-R)为基础,对铁路通信信号系统的集成与优化方法展开分析。阐述系统在网络拓扑优化、信号传输协议改进以及调度算法优化等方面的应用效果,并提出了建设综合集成平台的建议。测试结果表明,基于GSM-R的铁路通信信号系统集成与优化方法在提升系统可靠性、降低传输延迟和增强容错能力等方面展现出优异性能。展开更多
移动交换中心(Mobile Switching Centre,MSC)是铁路GSM-R网络的最核心网元,控制着全局移动用户呼叫的建立与释放,并提供面向其他相邻局的接口功能。以一起M S C设备移动呼叫控制单元(Wireless Call Control Unit,WCCU)模块倒换后,上海MS...移动交换中心(Mobile Switching Centre,MSC)是铁路GSM-R网络的最核心网元,控制着全局移动用户呼叫的建立与释放,并提供面向其他相邻局的接口功能。以一起M S C设备移动呼叫控制单元(Wireless Call Control Unit,WCCU)模块倒换后,上海MSC到北京、武汉汇接移动交换中心(Tandem Mobile Switching Center,TMSC)的局间中继电路状态异常问题为案例,采用比较分析的方法,结合网络信令、系统日志及设备软参配置进行详细研究。针对可能导致设备故障的原因采用排除法进行定位,进而实施有效、及时的应急处置,最终成功定位为软件参数设置不合理导致跨局呼叫失败,后通过调整软件参数,解决这一问题,为铁路GSM-R核心网日常维护、故障分析、应急处置等提供参考。展开更多
雅万高铁作为中国技术、中国标准“走出去”的标志性海外项目,其承载网络(GSM-R)共用接口设备是铁路通信业务运营的重要支持,该设备包括域名解析服务器(DNS)、认证服务器(RADIUS)、通用分组无线业务(General Packet Radio Service,GPRS...雅万高铁作为中国技术、中国标准“走出去”的标志性海外项目,其承载网络(GSM-R)共用接口设备是铁路通信业务运营的重要支持,该设备包括域名解析服务器(DNS)、认证服务器(RADIUS)、通用分组无线业务(General Packet Radio Service,GPRS)接口服务器(GRIS)、GPRS归属服务器(GROS)、监测信息GPRS接口服务器(M-GRIS),在GSM-R网络中发挥着重要作用,是铁路应用系统与通信系统间重要桥梁和纽带。围绕雅万高铁共用接口设备的功能规划与设计结构展开,着重研究冗余热备、网管监测及告警、网络安全等技术实现方案,确保系统运行的安全性及稳定性。雅万高铁联调联试及成功开通运营的实践表明,GSM-R共用接口设备运行可靠,为中国高铁技术和标准在海外市场的推广提供了可借鉴的范例。展开更多
文摘针对当前GSM-R车载空口监测面临缺乏分组域和无线电频谱监测,以及数据格式不统一等问题,通过对既有车载侧和基站侧的空口监测技术的深化研究,采用高速移动跟踪、软件无线电、动态流控和数据分类处理技术,设计开发GSM-R车载空口综合监测系统(简称空口监测系统)。从系统组成、功能实现、关键技术、应用案例等方面展开介绍,说明采集设备、频谱监测、电路域业务监测和分组域业务监测组成、定义、实现和应用。空口监测系统是补强G S M-R网络空口运用质量和性能监测的重要手段,可有效提升铁路列控业务故障分析整治和隐患排查能力,具有广阔的实际应用价值和前景。
基金financial support from the National Natural Science Foundation of China(Nos.22261057 and 21901265)Guizhou Provincial Natural Science Foundation(No.QKHJC-2020-1Z072)+3 种基金the Science and Technology Department of Guizhou Province(Nos.QKHPTRC-CXTD[2022]012 and QKHPTRCGCC[2023]003)Zunyi Medical University(No.18ZY-002)Science and Technology Department of Zunyi(Nos.ZSKH-2018-3,ZSKHHZZ[2020]70,ZSKRPT-2020-5 and ZSKRPT-2021-5)Fifth Batch of Talent Base in Guizhou Province(No.S-030-1).
文摘Catalytic syntheses of silaoxycarbocyclics from an interrupted Catellani reaction of 3-iodochromones with bridged olefins and octamethyl-1,4-dioxacyclohexasilane is described.This protocol involves the oxidative addition of chromonyl-norbornyl-palladacycle generated through successive oxidative addition of Pd(0)to 3-iodochromones,migratory insertion of NBE and intramolecular ortho-C(sp^(2))-H activation to the tetrasilane,thus motivating a(4+6)annulation and ring expansion.The synthetic practicality of current strategy is further proved by the late-stage modification of pharmaceuticals and natural products,gram-scale experiments,as well as the transformations of functional groups of silaoxycarbocyclics.
基金Analysis of Lung Compliance Measurement and its Guided Therapeutic Effects in Patients with ARDS Secondary to Severe Multiple Trauma(Project No.:XSD-2023-002)。
文摘In recent years,research on nursing interruptions has been conducted at various levels in emergency departments,intensive care units,hemodialysis centers,operating rooms,and sterilization and supply centers.Nursing interruptions are closely related to adverse nursing events,and interruptions in operating room nursing can significantly impact the success of a patient’s surgery.However,there is a lack of in-depth theoretical research on safety risk assessment and response decision-making by operating room nurses when faced with nursing interruptions.This article reviews the concept,current status,and impact of nursing interruptions in the operating room,analyzes the cognitive level,coping strategies,and negative emotions of operating room nurses,and elaborates on management strategies to provide references for research and management of nursing interruptions in the operating room.
基金Supported by the Shenyang Science and Technology,No.22-321-32-15Department of Science and Technology of Liaoning Province,No.2023JH2/101600015.
文摘BACKGROUND Gastric subepithelial lesions(SELs)are elevated lesions originating from the muscularis mucosa,submucosa,or muscularis propria,and may also include extraluminal lesions.For small SELs(less than 5 cm),complete endoscopic excision is the preferred treatment.Endoscopic full-thickness resection(EFTR)has proven to be an effective approach.AIM To evaluate the efficacy of the interrupted closure technique compared to the traditional closure technique in EFTR for gastric SELs.METHODS This single-center,prospective,randomized controlled trial was conducted at a tertiary hospital from September 2023 to September 2024.A total of 90 patients who underwent EFTR for gastric SELs were randomly allocated to either the interrupted closure group(n=44)or the traditional closure group(n=46).RESULTS All patients had complete resection and wound closure without any severe postoperative complications.The incidence of intraoperative gas-related complications was significantly lower in the interrupted closure group than in the traditional closure group(2.27%vs 26.09%,P=0.001),demonstrating interrupted closure technique can reduce the incidence of gas-related issues.Statistical analysis revealed that the incidence of postoperative infection was significantly lower in the experimental group than in the control group(15.91%vs 41.30%,P=0.008).Additionally,the median duration of antibiotic use was lower in the experimental group(3.5 days vs 5 days,P=0.013).Abdominal pain levels on postoperative days 1 and 4 were also lower in the experimental group compared to the control group(P<0.001).CONCLUSION The interrupted closure technique in EFTR for treating gastric SELs is safe and effective,reducing the incidence of intraoperative gas complications and postoperative infections.
文摘随着通信技术的不断发展,基于IP的Gb数据传输(简称Gb over IP)成为GSM-R网络的研究焦点。重点围绕GSM-R系统中BSC/PCU设备以Gb over IP方式接入核心网的方案开展研究,针对BSC/PCU与核心网设备异地设置时,BSC侧无法感知跨传输系统后链路中断,导致保护倒换机制未触发引起业务中断的问题,提出3种解决方案,并进行方案比选与优化,为GSM-R系统BSC/PCU设备以Gb over IP方式对接核心网方案提供操作指导及优化建议,以满足铁路移动通信系统多场景下的组网需求。
基金Jiangxi Provincial Hospital Pharmacy Special Research Fund Project(Grant No.2024-ZXYJ02).
文摘In the context of the Diagnosis Related Groups(DRGs)system,the orthopedic hospital implemented refined drug control to provide a pharmacological reference for promoting rational clinical drug use.A statistical analysis was conducted on the hospital’s data from January to December 2021(prior to the implementation of control),focusing on the types of unreasonable prescriptions.A multi-dimensional analysis was also conducted to identify the underlying causes of inappropriate medication practices.Following this,refined drug control measures were introduced,and data from January to December 2022(post-control)were compared,examining factors such as the average drug cost,drug expenses for the IC29 diagnosis group,and the drug cost ratio.An interrupted time-series analysis was employed to evaluate the effects of these interventions.The results showed that after the implementation of refined drug control in the orthopedic department,significant reductions were observed in the average cost per patient,average drug cost per patient,drug cost ratio,cost consumption index,average length of hospital stay,and allocation ratio(P<0.05).In particular,the first month of control(January 2022)saw a marked decrease in average drug costs per patient by 1272.90 yuan(P<0.01),a reduction in the drug cost ratio by 0.98%,and a decline in drug costs for the IC29 diagnosis group by 616.79 yuan(P>0.05).Moreover,the rate of unreasonable inappropriate prescribing dropped dramatically from 40.48%in 2021 to 3.57%by December 2022.The refined control of drug use within the orthopedic hospital significantly improved the rationality of clinical prescribing practices,reduced the occurrence of adverse drug reactions,and enhanced patient adherence to prescribed treatments.These findings demonstrated considerable clinical value in promoting efficient and safe drug use.
基金funded by the Bavarian State Ministry of ScienceResearch and Art(Grant number:H.2-F1116.WE/52/2)。
文摘The incremental capacity analysis(ICA)technique is notably limited by its sensitivity to variations in charging conditions,which constrains its practical applicability in real-world scenarios.This paper introduces an ICA-compensation technique to address this limitation and propose a generalized framework for assessing the state of health(SOH)of batteries based on ICA that is applicable under differing charging conditions.This novel approach calculates the voltage profile under quasi-static conditions by subtracting the voltage increase attributable to the additional polarization effects at high currents from the measured voltage profile.This approach's efficacy is contingent upon precisely acquiring the equivalent impedance.To obtain the equivalent impedance throughout the batteries'lifespan while minimizing testing costs,this study employs a current interrupt technique in conjunction with a long short-term memory(LSTM)network to develop a predictive model for equivalent impedance.Following the derivation of ICA curves using voltage profiles under quasi-static conditions,the research explores two scenarios for SOH estimation:one utilizing only incremental capacity(IC)features and the other incorporating both IC features and IC sampling.A genetic algorithm-optimized backpropagation neural network(GABPNN)is employed for the SOH estimation.The proposed generalized framework is validated using independent training and test datasets.Variable test conditions are applied for the test set to rigorously evaluate the methodology under challenging conditions.These evaluation results demonstrate that the proposed framework achieves an estimation accuracy of 1.04%for RMSE and 0.90%for MAPE across a spectrum of charging rates ranging from 0.1 C to 1 C and starting SOCs between 0%and 70%,which constitutes a major advancement compared to established ICA methods.It also significantly enhances the applicability of conventional ICA techniques in varying charging conditions and negates the necessity for separate testing protocols for each charging scenario.
文摘为解决传统铁路通信信号系统存在的实时性不足、可靠性较低等问题,提升铁路运输的安全性与效率,以铁路综合数字移动通信系统(global system for mobile communications-railway,GSM-R)为基础,对铁路通信信号系统的集成与优化方法展开分析。阐述系统在网络拓扑优化、信号传输协议改进以及调度算法优化等方面的应用效果,并提出了建设综合集成平台的建议。测试结果表明,基于GSM-R的铁路通信信号系统集成与优化方法在提升系统可靠性、降低传输延迟和增强容错能力等方面展现出优异性能。
文摘移动交换中心(Mobile Switching Centre,MSC)是铁路GSM-R网络的最核心网元,控制着全局移动用户呼叫的建立与释放,并提供面向其他相邻局的接口功能。以一起M S C设备移动呼叫控制单元(Wireless Call Control Unit,WCCU)模块倒换后,上海MSC到北京、武汉汇接移动交换中心(Tandem Mobile Switching Center,TMSC)的局间中继电路状态异常问题为案例,采用比较分析的方法,结合网络信令、系统日志及设备软参配置进行详细研究。针对可能导致设备故障的原因采用排除法进行定位,进而实施有效、及时的应急处置,最终成功定位为软件参数设置不合理导致跨局呼叫失败,后通过调整软件参数,解决这一问题,为铁路GSM-R核心网日常维护、故障分析、应急处置等提供参考。
文摘雅万高铁作为中国技术、中国标准“走出去”的标志性海外项目,其承载网络(GSM-R)共用接口设备是铁路通信业务运营的重要支持,该设备包括域名解析服务器(DNS)、认证服务器(RADIUS)、通用分组无线业务(General Packet Radio Service,GPRS)接口服务器(GRIS)、GPRS归属服务器(GROS)、监测信息GPRS接口服务器(M-GRIS),在GSM-R网络中发挥着重要作用,是铁路应用系统与通信系统间重要桥梁和纽带。围绕雅万高铁共用接口设备的功能规划与设计结构展开,着重研究冗余热备、网管监测及告警、网络安全等技术实现方案,确保系统运行的安全性及稳定性。雅万高铁联调联试及成功开通运营的实践表明,GSM-R共用接口设备运行可靠,为中国高铁技术和标准在海外市场的推广提供了可借鉴的范例。
