ECG monitoring in daily life is an important means of treating heart disease. To make it easier for the medical to monitor the ECG of their patients outside the hospital, we designed and developed an ECG monitoring an...ECG monitoring in daily life is an important means of treating heart disease. To make it easier for the medical to monitor the ECG of their patients outside the hospital, we designed and developed an ECG monitoring and alarming system based on Android smart phone. In our system, an ECG device collects the ECG signal and transmits it to an Android phone. The Android phone detects alarms which come from the ECG devices. When alarms occur, Android phone will capture the ECG images and the details about the alarms, and sends them to the cloud Alarm Server (AS). Once received, AS push the messages to doctors’ phone, so the doctors could see the ECG images and alarm details on their mobile phone. In our system, high resolution ECG pictures are transmitted to doctors’ phone in a user-friendly way, which can help doctors keep track of their patient’s condition easily.展开更多
Objective:To explore the clinical rationale of critical care nurses for personalizing monitor alarms.One of the most crucial jobs assigned to critical care nurses is monitoring patients'physiological indicators an...Objective:To explore the clinical rationale of critical care nurses for personalizing monitor alarms.One of the most crucial jobs assigned to critical care nurses is monitoring patients'physiological indicators and carrying out the necessary associated interventions.Successful use of equipment in the nursing practice environment will be improved by a thorough understanding of the nurse's approach to alarm configuration.Methods:A mixed-method design integrating quantitative and qualitative components was used.The sample of this study recruited a convenience sample of 60 nurses who have worked in critical care areas.This study took place at Lebanese American University Medical Center Rizk Hospital,utilizing a semi-structured interview with participants.Results:The study demonstrated the high incidence of nuisance alarms and the desensitization of critical care nurses to vital ones.According to the nurses,frequent false alarms and a shortage of staff are the 2 main causes of alarm desensitization.Age was significantly associated with the perception of Smart alarms,according to the data(P=0.03).Four interconnected themes and subcategories that reflect the clinical reasoning process for alarm customization were developed as a result of the study's qualitative component:(1)unit alarm environment;(2)nursing style;(3)motivation to customize;and(4)clinical and technological customization.Conclusions:According to this study,nurses believe that alarms are valuable.However,a qualitative analysis of the experiences revealed that customization has been severely limited since the healthcare team depends on nurses to complete these tasks independently.Additionally,a staffing shortage and lack of technical training at the start of placement have also hindered customization.展开更多
To improve the reliability of the light emitting diode(LED)signal lamp filament current monitoring alarm instrument for metro systems,a new type of hot standby online monitoring apparatus was developed which is based ...To improve the reliability of the light emitting diode(LED)signal lamp filament current monitoring alarm instrument for metro systems,a new type of hot standby online monitoring apparatus was developed which is based on synchronous transmission data(STD)bus technology.In this system,a double hot standby mode can be achieved by adopting bus arbitration.In addition,to detect the effective value of alternating current which is from 0 to 200 mA in the signal lamp lighting circuit,a precision rectifier signal conditioning circuit and an isolated acquisition circuit were designed.This new type of alarm instrument has high detection accuracy and could meet the functional requirements for metro signal systems after comparing it with some industry products that were applied on the spot.展开更多
Monitoring tire pressure of cars and signaling abnormal conditions is an important means to prevent deadly accidents. Large achievements have been gained, especially in direct tire pressure monitoring system（TPMS）. ...Monitoring tire pressure of cars and signaling abnormal conditions is an important means to prevent deadly accidents. Large achievements have been gained, especially in direct tire pressure monitoring system（TPMS）. But there has been rarely research on indirect TPMS in the world. In China, the research on indirect TPMS is almost lacking. The international research on the indirect monitoring tire pressure method is mainly based on measuring and comparing the rotating speed of wheels. But it is very difficult to measure wheel rotating speed accurately because of the influence of many random factors. In this paper, the authors propose a new method in which the tire pressure can be monitored indirectly. This method can be used for tire calibration, wheel speed frequency standardization, wheel speed frequency comparison, and abnormal tire pressure determination. The pulse frequencies from wheel speed sensors of ABS are used to indicate tire deformation. Because the frequency has a relationship with tire deformation, the tire deformation reflects the tire pressure. Small sample statistics is used in the new method to increase the accuracy, and the experimental samples using the principle of the new method have been made and tested. The result of vehicle tests on road demonstrates that the method is efficient and accurate to monitor tire pressure. The research has positive potential for developing products.展开更多
The monitoring system of ship cabin based on single chip computer is introduced. The system can inspect the signal circulatively coming from sensors of all kinds, and give alarm when limit is broken. It demonstrated t...The monitoring system of ship cabin based on single chip computer is introduced. The system can inspect the signal circulatively coming from sensors of all kinds, and give alarm when limit is broken. It demonstrated the working principles, hardware block diagram and software flow diagram of the system.展开更多
目的开发急诊信息系统的心电监护报警参数自动计算与预警模块,并探讨其在急诊危重患者安全管理中的应用效果。方法成立危重患者心电监护报警参数设置的改进团队,设计研发急诊信息系统心电监护报警范围自动计算模块与预警模块。选取2023...目的开发急诊信息系统的心电监护报警参数自动计算与预警模块,并探讨其在急诊危重患者安全管理中的应用效果。方法成立危重患者心电监护报警参数设置的改进团队,设计研发急诊信息系统心电监护报警范围自动计算模块与预警模块。选取2023年3—12月浙江省某三甲医院急诊抢救室使用心电监护的危重患者作为研究对象,将报警范围自动计算与预警模块应用前后分为对照组(2023年3—5月)和观察组(2023年10—12月),比较2组患者心电监护报警参数设置正确率、报警设置错误同时期患者基本情况,观察实践效果。结果应用心电监护仪报警参数设置与预警模块后,心电监护报警参数设置正确率由75.53%提高至90.89%(χ2=400.57,P<0.01);应用心电监护仪报警参数设置及预警模块前后监护仪参数设置错误患者基本信息比较发现,模块应用后同时期护士管理急危重患者数明显增加[(5.66±0.41)例vs(7.98±0.67)例,t=-4.46,P<0.01],预检分诊Ⅰ、Ⅱ级危重患者参数设置错误例数明显减少(44例vs 26例,χ2=15.60,P<0.01);2组患者在入抢时改良早期预警评分(modified early warning score,MEWS)差异无统计学意义[(4.38±0.16)分vs(4.46±0.36)分,t=-0.20,P=0.84]。结论应用心电监护报警参数自动计算与预警模块能够提升急诊抢救室报警参数设置正确率,大大提升了护理工作效率,更好地保障护理安全,值得临床推广。展开更多
According to the latest studies, the French population witnesses a high level of elderly. It follows from this phenomenon health troubles, fragility, and for some people suffering from cognitive problems, a daily need...According to the latest studies, the French population witnesses a high level of elderly. It follows from this phenomenon health troubles, fragility, and for some people suffering from cognitive problems, a daily need of monitoring and tracking in the fugues cases. It is in this context that comes our research program SACHA (Search and Computerize Human Acts). Our ambition is to develop an electronic patch able to trigger alarms, detect falls and provide geolocation service. Our studies were focused on the conception and the integration of different antennas and functionalities of this system in aim to ensure a good compromise “integration/performances”. Several prototypes have been tested and validated in a nursing home.展开更多
随着自动驾驶技术的快速发展,4D毫米波雷达因其全天候适应性和抗干扰能力,成为同步定位与地图构建(Simultaneous Localization and Mapping,SLAM)的关键传感器。然而在隧道等封闭环境中,多径效应引发的虚警点云严重影响了雷达SLAM系统...随着自动驾驶技术的快速发展,4D毫米波雷达因其全天候适应性和抗干扰能力,成为同步定位与地图构建(Simultaneous Localization and Mapping,SLAM)的关键传感器。然而在隧道等封闭环境中,多径效应引发的虚警点云严重影响了雷达SLAM系统的定位精度与建图效果。针对这一问题,本文基于对隧道中的毫米波雷达点云数据特性和散射角特征的规律分析提出了一种全新的滑窗动态滤波算法。该方法结合了点云的空间统计特性与邻域密度检测方法剔除离群噪声点云,利用雷达点云粗配准获得先验估计位姿,结合雷达点云俯仰向和方位向的三维散射角特征,实现对真实目标点云数据的区分和聚类。随后使用随机采样一致性算法(Random Sample Consensus,RANSAC)拟合隧道墙壁平面并构建隧道墙面模型。通过引入动态滑窗更新策略,利用拟合的隧道墙面模型与先验估计位姿实时更新当前姿态节点到墙面边界距离阈值,使用距离阈值进一步消除隧道空间以外的虚警点云和噪声点云,并在因子图优化框架下完成全局位姿修正与局部地图更新。本研究在真实的隧道环境中采集多个不同场景的数据进行实验验证,实验结果证明本研究提出的方法在有效降低虚警点云干扰的同时,显著提高了定位精度和建图质量,且能在复杂环境中保持较高的稳定性。本研究为提高4D毫米波雷达SLAM在封闭环境中的鲁棒性提供了新的技术思路和实现路径。展开更多
文摘ECG monitoring in daily life is an important means of treating heart disease. To make it easier for the medical to monitor the ECG of their patients outside the hospital, we designed and developed an ECG monitoring and alarming system based on Android smart phone. In our system, an ECG device collects the ECG signal and transmits it to an Android phone. The Android phone detects alarms which come from the ECG devices. When alarms occur, Android phone will capture the ECG images and the details about the alarms, and sends them to the cloud Alarm Server (AS). Once received, AS push the messages to doctors’ phone, so the doctors could see the ECG images and alarm details on their mobile phone. In our system, high resolution ECG pictures are transmitted to doctors’ phone in a user-friendly way, which can help doctors keep track of their patient’s condition easily.
文摘Objective:To explore the clinical rationale of critical care nurses for personalizing monitor alarms.One of the most crucial jobs assigned to critical care nurses is monitoring patients'physiological indicators and carrying out the necessary associated interventions.Successful use of equipment in the nursing practice environment will be improved by a thorough understanding of the nurse's approach to alarm configuration.Methods:A mixed-method design integrating quantitative and qualitative components was used.The sample of this study recruited a convenience sample of 60 nurses who have worked in critical care areas.This study took place at Lebanese American University Medical Center Rizk Hospital,utilizing a semi-structured interview with participants.Results:The study demonstrated the high incidence of nuisance alarms and the desensitization of critical care nurses to vital ones.According to the nurses,frequent false alarms and a shortage of staff are the 2 main causes of alarm desensitization.Age was significantly associated with the perception of Smart alarms,according to the data(P=0.03).Four interconnected themes and subcategories that reflect the clinical reasoning process for alarm customization were developed as a result of the study's qualitative component:(1)unit alarm environment;(2)nursing style;(3)motivation to customize;and(4)clinical and technological customization.Conclusions:According to this study,nurses believe that alarms are valuable.However,a qualitative analysis of the experiences revealed that customization has been severely limited since the healthcare team depends on nurses to complete these tasks independently.Additionally,a staffing shortage and lack of technical training at the start of placement have also hindered customization.
文摘To improve the reliability of the light emitting diode(LED)signal lamp filament current monitoring alarm instrument for metro systems,a new type of hot standby online monitoring apparatus was developed which is based on synchronous transmission data(STD)bus technology.In this system,a double hot standby mode can be achieved by adopting bus arbitration.In addition,to detect the effective value of alternating current which is from 0 to 200 mA in the signal lamp lighting circuit,a precision rectifier signal conditioning circuit and an isolated acquisition circuit were designed.This new type of alarm instrument has high detection accuracy and could meet the functional requirements for metro signal systems after comparing it with some industry products that were applied on the spot.
基金supported by the Opening Foundation of State Key Laboratory of Automobile Safety and Energy,Tsinghua University,China(Grant No. KF2005-11,Grant No.KF2007-09)
文摘Monitoring tire pressure of cars and signaling abnormal conditions is an important means to prevent deadly accidents. Large achievements have been gained, especially in direct tire pressure monitoring system（TPMS）. But there has been rarely research on indirect TPMS in the world. In China, the research on indirect TPMS is almost lacking. The international research on the indirect monitoring tire pressure method is mainly based on measuring and comparing the rotating speed of wheels. But it is very difficult to measure wheel rotating speed accurately because of the influence of many random factors. In this paper, the authors propose a new method in which the tire pressure can be monitored indirectly. This method can be used for tire calibration, wheel speed frequency standardization, wheel speed frequency comparison, and abnormal tire pressure determination. The pulse frequencies from wheel speed sensors of ABS are used to indicate tire deformation. Because the frequency has a relationship with tire deformation, the tire deformation reflects the tire pressure. Small sample statistics is used in the new method to increase the accuracy, and the experimental samples using the principle of the new method have been made and tested. The result of vehicle tests on road demonstrates that the method is efficient and accurate to monitor tire pressure. The research has positive potential for developing products.
文摘The monitoring system of ship cabin based on single chip computer is introduced. The system can inspect the signal circulatively coming from sensors of all kinds, and give alarm when limit is broken. It demonstrated the working principles, hardware block diagram and software flow diagram of the system.
文摘目的开发急诊信息系统的心电监护报警参数自动计算与预警模块,并探讨其在急诊危重患者安全管理中的应用效果。方法成立危重患者心电监护报警参数设置的改进团队,设计研发急诊信息系统心电监护报警范围自动计算模块与预警模块。选取2023年3—12月浙江省某三甲医院急诊抢救室使用心电监护的危重患者作为研究对象,将报警范围自动计算与预警模块应用前后分为对照组(2023年3—5月)和观察组(2023年10—12月),比较2组患者心电监护报警参数设置正确率、报警设置错误同时期患者基本情况,观察实践效果。结果应用心电监护仪报警参数设置与预警模块后,心电监护报警参数设置正确率由75.53%提高至90.89%(χ2=400.57,P<0.01);应用心电监护仪报警参数设置及预警模块前后监护仪参数设置错误患者基本信息比较发现,模块应用后同时期护士管理急危重患者数明显增加[(5.66±0.41)例vs(7.98±0.67)例,t=-4.46,P<0.01],预检分诊Ⅰ、Ⅱ级危重患者参数设置错误例数明显减少(44例vs 26例,χ2=15.60,P<0.01);2组患者在入抢时改良早期预警评分(modified early warning score,MEWS)差异无统计学意义[(4.38±0.16)分vs(4.46±0.36)分,t=-0.20,P=0.84]。结论应用心电监护报警参数自动计算与预警模块能够提升急诊抢救室报警参数设置正确率,大大提升了护理工作效率,更好地保障护理安全,值得临床推广。
文摘According to the latest studies, the French population witnesses a high level of elderly. It follows from this phenomenon health troubles, fragility, and for some people suffering from cognitive problems, a daily need of monitoring and tracking in the fugues cases. It is in this context that comes our research program SACHA (Search and Computerize Human Acts). Our ambition is to develop an electronic patch able to trigger alarms, detect falls and provide geolocation service. Our studies were focused on the conception and the integration of different antennas and functionalities of this system in aim to ensure a good compromise “integration/performances”. Several prototypes have been tested and validated in a nursing home.
