The importance of breathing training in dance teaching is reflected in the two aspects of enhancing the quality of dance movements and sublimating the connotation of dance movements.For example,high-quality breathing ...The importance of breathing training in dance teaching is reflected in the two aspects of enhancing the quality of dance movements and sublimating the connotation of dance movements.For example,high-quality breathing can help performers complete the dance movements and improve the coordination of the movements;at the same time,the unique body rhythm formed by breathing can strengthen the visual effect of the performance and convey its spirit and soul to the audience.This requires folk dance teachers to carry out relevant training and teaching activities based on the categories and skills of dance breathing,such as changing students’ideological cognition,developing periodic breathing training courses,providing personalized guidance to students,and allowing students to adjust their learning and practice methods in the evaluation.展开更多
A novel breathing guidance method by combining the personalized audio-visual biofeedback (BFB) system, the breath hold (BH) method, and the synchrotron-based gating technique have been developed to help patients synch...A novel breathing guidance method by combining the personalized audio-visual biofeedback (BFB) system, the breath hold (BH) method, and the synchrotron-based gating technique have been developed to help patients synchronize their respiratory patterns with the synchrotron pulsed operation manner so as to overcome typical limitations such as low efficiency and residual motion[1;2]. This year we chose four fractions to evaluate the reproducibility of subject compliance with the breathing guidance maneuvers among different fractions for the breathing guidance technique.展开更多
In the framework of nonlinear wave optics,we report the evolution process of a dipole breathing wave in lossy nonlocal nonlinear media based on the nonlocal nonlinear Schrödinger equation.The analytical expressio...In the framework of nonlinear wave optics,we report the evolution process of a dipole breathing wave in lossy nonlocal nonlinear media based on the nonlocal nonlinear Schrödinger equation.The analytical expression of the dipole breathing wave in such a nonlinear system is obtained by using the variational method.Taking advantage of the analytical expression,we analyze the influences of various physical parameters on the breathing wave propagation,including the propagation loss and the input power on the beam width,the beam intensity,and the wavefront curvature.Also,the corresponding analytical solutions are obtained.The validity of the analysis results is verified by numerical simulation.This study provides some new insights for investigating beam propagation in lossy nonlinear media.展开更多
In this paper, a new analytical method for vibration analysis of a cracked simply supported beam is investigated. By considering a nonlinear model for the fatigue crack, the governing equation of motion of the cracked...In this paper, a new analytical method for vibration analysis of a cracked simply supported beam is investigated. By considering a nonlinear model for the fatigue crack, the governing equation of motion of the cracked beam is solved using perturbation method. The solution of the governing equation reveals the superhaxmonics of the fundamental frequency due to the nonlinear effects in the dynamic response of the cracked beam. Furthermore, considering such a solution, an explicit expression is also derived for the system damping changes due to the changes in the crack parameters, geometric dimensions and mechanical properties of the cracked beam. The results show that an increase in the crack severity and approaching the crack location to the middle of the beam increase the system damping. In order to validate the results, changes in the fundamental frequency ratios against the fatigue crack severities are compared with those of experimental results available in the literature. Also, a comparison is made between the free response of the cracked beam with a given crack depth and location obtained by the proposed analytical solution and that of the numerical method. The results of the proposed method agree with the experimental and numerical results.展开更多
Guided waves are generally considered as a powerful approach for crack detection in structures,which are commonly investigated using the finite element method(FEM).However,the traditional FEM has many disadvantages in...Guided waves are generally considered as a powerful approach for crack detection in structures,which are commonly investigated using the finite element method(FEM).However,the traditional FEM has many disadvantages in solving wave propagation due to the strict requirement of mesh density.To tackle this issue,this paper proposes an efficient time-domain spectral finite element method(SFEM)to analyze wave propagation in cracked structures,in which the breathing crack is modeled by definiiig the spectral gap element.Moreover,novel orthogonal polynomials and Gauss-Lobatto-Legendre quadrature rules are adopted to construct the spectral element.Meanwhile,a separable hard contact is utilized to simulate the breathing behavior.Finally,a comparison of the numerical results between the FEM and the SFEM is conducted to demonstrate the high efficiency and accuracy of the proposed method.Based on the developed SFEM,the nonlinear features of waves and influence of the incident mode are also studied in detail,which provides a helpful guide for a physical understanding of the wave propagation behavior in structures with breathing cracks.展开更多
目的探讨转变助产服务模式下瑜伽球训练联合拉玛泽呼吸减痛法在初产妇自然分娩中的应用效果,为制定初产妇自然分娩护理干预方案提供参考。方法选取2021年4月—2023年3月河北北方学院附属第一医院收治的拟行阴道分娩的196例产妇,采用简...目的探讨转变助产服务模式下瑜伽球训练联合拉玛泽呼吸减痛法在初产妇自然分娩中的应用效果,为制定初产妇自然分娩护理干预方案提供参考。方法选取2021年4月—2023年3月河北北方学院附属第一医院收治的拟行阴道分娩的196例产妇,采用简单随机化法分为对照组与观察组,每组98例。对照组产妇采取常规助产护理模式干预,观察组产妇采取转变助产服务模式下瑜伽球训练联合拉玛泽呼吸减痛法干预。比较2组产妇最终分娩方式、各产程分娩疼痛程度、各产程时间、产后出血量与分娩控制感水平;比较2组新生儿动脉血氧分压(PaO_(2))、动脉血二氧化碳分压(PaCO_(2))、动脉血pH值、1 min Apgar评分等指标。结果观察组产妇经阴道分娩率为88.78%(87/98),高于对照组的76.53%(75/98),且观察组产妇中转剖宫产率为11.22%(11/98),低于对照组的23.47%(23/98),差异有统计学意义(χ^(2)=5.124,P=0.024)。观察组产妇第一产程、第二产程、第三产程视觉模拟评分法(VAS)评分均低于对照组,差异均有统计学意义(P<0.05)。观察组产妇第一产程、第二产程、第三产程时间均短于对照组,差异均有统计学意义(P<0.05)。观察组产妇产后出血量小于对照组,差异有统计学意义(P<0.05)。观察组产妇分娩控制量表(LAS)评分高于对照组,差异有统计学意义(P<0.05)。观察组新生儿PaCO_(2)水平均低于对照组,PaO_(2)水平、动脉血pH值、1 min Apgar评分均高于对照组,差异均有统计学意义(P<0.05)。结论转变助产服务模式下瑜伽球训练联合拉玛泽呼吸减痛法干预在初产妇自然分娩中应用价值较高,能有效降低产妇中转剖宫产率,增强产妇分娩控制感,减轻产妇分娩疼痛,降低新生儿窒息风险。展开更多
目的探讨配偶+助产士导乐式陪伴结合五维音乐呼吸法对初产妇分娩控制感及心理应激的影响。方法随机抽取2019年1月至2022年12月孕满37周的80例初产妇为研究对象,随机将其分为对照组和干预组,各40例。对照组给予助产士导乐式陪伴护理,干...目的探讨配偶+助产士导乐式陪伴结合五维音乐呼吸法对初产妇分娩控制感及心理应激的影响。方法随机抽取2019年1月至2022年12月孕满37周的80例初产妇为研究对象,随机将其分为对照组和干预组,各40例。对照组给予助产士导乐式陪伴护理,干预组给予配偶+助产士导乐式陪伴结合五维音乐呼吸法护理。比较两组的护理效果。结果干预组的总产程时间短于对照组,宫口开2~3 cm、9~10 cm的视觉模拟评分法(VAS)评分低于对照组,5 min Apgar评分高于对照组(P<0.05)。干预组的不良母婴结局总发生率低于对照组(P<0.05)。护理后,两组的汉密尔顿焦虑量表(HAMA)、汉密尔顿抑郁量表(HRSD)评分均低于护理前,且干预组低于对照组(P<0.05)。干预组的分娩控制量表(LAS)、分娩体验问卷(CEQ2.0)、产妇配偶陪伴分娩体验问卷评分高于对照组(P<0.05)。结论配偶+助产士导乐式陪伴结合五维音乐呼吸法能有效降低初产妇分娩过程中的疼痛感,改善母婴结局,消除或缓解焦虑、抑郁情绪,提高分娩控制感。展开更多
The first automatic algorithm was designed to estimate the pulse pressure variation (PPVPPV) from arterial blood pressure (ABP) signals under spontaneous breathing conditions. While currently there are a few publicly ...The first automatic algorithm was designed to estimate the pulse pressure variation (PPVPPV) from arterial blood pressure (ABP) signals under spontaneous breathing conditions. While currently there are a few publicly available algorithms to automatically estimate PPVPPV accurately and reliably in mechani-cally ventilated subjects, at the moment there is no automatic algorithm for estimating PPVPPV on sponta-neously breathing subjects. The algorithm utilizes our recently developed sequential Monte Carlo method (SMCM), which is called a maximum a-posteriori adaptive marginalized particle filter (MAM-PF). The performance assessment results of the proposed algorithm on real ABP signals from spontaneously breath-ing subjects were reported.展开更多
文摘The importance of breathing training in dance teaching is reflected in the two aspects of enhancing the quality of dance movements and sublimating the connotation of dance movements.For example,high-quality breathing can help performers complete the dance movements and improve the coordination of the movements;at the same time,the unique body rhythm formed by breathing can strengthen the visual effect of the performance and convey its spirit and soul to the audience.This requires folk dance teachers to carry out relevant training and teaching activities based on the categories and skills of dance breathing,such as changing students’ideological cognition,developing periodic breathing training courses,providing personalized guidance to students,and allowing students to adjust their learning and practice methods in the evaluation.
文摘A novel breathing guidance method by combining the personalized audio-visual biofeedback (BFB) system, the breath hold (BH) method, and the synchrotron-based gating technique have been developed to help patients synchronize their respiratory patterns with the synchrotron pulsed operation manner so as to overcome typical limitations such as low efficiency and residual motion[1;2]. This year we chose four fractions to evaluate the reproducibility of subject compliance with the breathing guidance maneuvers among different fractions for the breathing guidance technique.
基金the National Natural Science Foundation of China(Grant No.12074098)the Natural Science Foundation of Hebei Province of China(Grant Nos.A2020205009 and F2020205016)+2 种基金the Science and Technology Project of Hebei Education Department,China(Grant No.ZD2018081)the Chunhui Plan of Ministry of Education of China(Grant No.Z2017020)the Science Foundation for Distinguished Young Scholars of Hebei Normal University of China(Grant No.L2017J02).
文摘In the framework of nonlinear wave optics,we report the evolution process of a dipole breathing wave in lossy nonlocal nonlinear media based on the nonlocal nonlinear Schrödinger equation.The analytical expression of the dipole breathing wave in such a nonlinear system is obtained by using the variational method.Taking advantage of the analytical expression,we analyze the influences of various physical parameters on the breathing wave propagation,including the propagation loss and the input power on the beam width,the beam intensity,and the wavefront curvature.Also,the corresponding analytical solutions are obtained.The validity of the analysis results is verified by numerical simulation.This study provides some new insights for investigating beam propagation in lossy nonlinear media.
文摘In this paper, a new analytical method for vibration analysis of a cracked simply supported beam is investigated. By considering a nonlinear model for the fatigue crack, the governing equation of motion of the cracked beam is solved using perturbation method. The solution of the governing equation reveals the superhaxmonics of the fundamental frequency due to the nonlinear effects in the dynamic response of the cracked beam. Furthermore, considering such a solution, an explicit expression is also derived for the system damping changes due to the changes in the crack parameters, geometric dimensions and mechanical properties of the cracked beam. The results show that an increase in the crack severity and approaching the crack location to the middle of the beam increase the system damping. In order to validate the results, changes in the fundamental frequency ratios against the fatigue crack severities are compared with those of experimental results available in the literature. Also, a comparison is made between the free response of the cracked beam with a given crack depth and location obtained by the proposed analytical solution and that of the numerical method. The results of the proposed method agree with the experimental and numerical results.
基金the National Natural Sclenee Foundation of China(Grant No.51704222)China Pastdoctoral Science Foundation(Grant No.2018M633570)Fundamental Research Funds for the Cemtal Unveritiee(Grant No.3102017090004).
文摘Guided waves are generally considered as a powerful approach for crack detection in structures,which are commonly investigated using the finite element method(FEM).However,the traditional FEM has many disadvantages in solving wave propagation due to the strict requirement of mesh density.To tackle this issue,this paper proposes an efficient time-domain spectral finite element method(SFEM)to analyze wave propagation in cracked structures,in which the breathing crack is modeled by definiiig the spectral gap element.Moreover,novel orthogonal polynomials and Gauss-Lobatto-Legendre quadrature rules are adopted to construct the spectral element.Meanwhile,a separable hard contact is utilized to simulate the breathing behavior.Finally,a comparison of the numerical results between the FEM and the SFEM is conducted to demonstrate the high efficiency and accuracy of the proposed method.Based on the developed SFEM,the nonlinear features of waves and influence of the incident mode are also studied in detail,which provides a helpful guide for a physical understanding of the wave propagation behavior in structures with breathing cracks.
文摘目的探讨转变助产服务模式下瑜伽球训练联合拉玛泽呼吸减痛法在初产妇自然分娩中的应用效果,为制定初产妇自然分娩护理干预方案提供参考。方法选取2021年4月—2023年3月河北北方学院附属第一医院收治的拟行阴道分娩的196例产妇,采用简单随机化法分为对照组与观察组,每组98例。对照组产妇采取常规助产护理模式干预,观察组产妇采取转变助产服务模式下瑜伽球训练联合拉玛泽呼吸减痛法干预。比较2组产妇最终分娩方式、各产程分娩疼痛程度、各产程时间、产后出血量与分娩控制感水平;比较2组新生儿动脉血氧分压(PaO_(2))、动脉血二氧化碳分压(PaCO_(2))、动脉血pH值、1 min Apgar评分等指标。结果观察组产妇经阴道分娩率为88.78%(87/98),高于对照组的76.53%(75/98),且观察组产妇中转剖宫产率为11.22%(11/98),低于对照组的23.47%(23/98),差异有统计学意义(χ^(2)=5.124,P=0.024)。观察组产妇第一产程、第二产程、第三产程视觉模拟评分法(VAS)评分均低于对照组,差异均有统计学意义(P<0.05)。观察组产妇第一产程、第二产程、第三产程时间均短于对照组,差异均有统计学意义(P<0.05)。观察组产妇产后出血量小于对照组,差异有统计学意义(P<0.05)。观察组产妇分娩控制量表(LAS)评分高于对照组,差异有统计学意义(P<0.05)。观察组新生儿PaCO_(2)水平均低于对照组,PaO_(2)水平、动脉血pH值、1 min Apgar评分均高于对照组,差异均有统计学意义(P<0.05)。结论转变助产服务模式下瑜伽球训练联合拉玛泽呼吸减痛法干预在初产妇自然分娩中应用价值较高,能有效降低产妇中转剖宫产率,增强产妇分娩控制感,减轻产妇分娩疼痛,降低新生儿窒息风险。
文摘目的探讨配偶+助产士导乐式陪伴结合五维音乐呼吸法对初产妇分娩控制感及心理应激的影响。方法随机抽取2019年1月至2022年12月孕满37周的80例初产妇为研究对象,随机将其分为对照组和干预组,各40例。对照组给予助产士导乐式陪伴护理,干预组给予配偶+助产士导乐式陪伴结合五维音乐呼吸法护理。比较两组的护理效果。结果干预组的总产程时间短于对照组,宫口开2~3 cm、9~10 cm的视觉模拟评分法(VAS)评分低于对照组,5 min Apgar评分高于对照组(P<0.05)。干预组的不良母婴结局总发生率低于对照组(P<0.05)。护理后,两组的汉密尔顿焦虑量表(HAMA)、汉密尔顿抑郁量表(HRSD)评分均低于护理前,且干预组低于对照组(P<0.05)。干预组的分娩控制量表(LAS)、分娩体验问卷(CEQ2.0)、产妇配偶陪伴分娩体验问卷评分高于对照组(P<0.05)。结论配偶+助产士导乐式陪伴结合五维音乐呼吸法能有效降低初产妇分娩过程中的疼痛感,改善母婴结局,消除或缓解焦虑、抑郁情绪,提高分娩控制感。
文摘The first automatic algorithm was designed to estimate the pulse pressure variation (PPVPPV) from arterial blood pressure (ABP) signals under spontaneous breathing conditions. While currently there are a few publicly available algorithms to automatically estimate PPVPPV accurately and reliably in mechani-cally ventilated subjects, at the moment there is no automatic algorithm for estimating PPVPPV on sponta-neously breathing subjects. The algorithm utilizes our recently developed sequential Monte Carlo method (SMCM), which is called a maximum a-posteriori adaptive marginalized particle filter (MAM-PF). The performance assessment results of the proposed algorithm on real ABP signals from spontaneously breath-ing subjects were reported.
