The emission of anomalous X-ray pulsars(AXPs)and soft gamma-ray repeaters(SGRs)is believed to be powered by the dissipation of their strong magnetic fields,which coined the name“magnetar”.By combining timing and ene...The emission of anomalous X-ray pulsars(AXPs)and soft gamma-ray repeaters(SGRs)is believed to be powered by the dissipation of their strong magnetic fields,which coined the name“magnetar”.By combining timing and energy observational results,the magnetar model can be easily appreciated.From a timing perspective,the magnetic field strengths of AXPs and SGRs,which are calculated under the assumption of dipole radiation,are extremely strong.From an energy perspective,the X-ray/soft gamma-ray luminosities of AXPs and SGRs are larger than their rotational energy loss rates(i.e.,L_(x>E_(rot)).It is thus reasonable to assume that the high-energy radiation comes from magnetic energy decay,and the magnetar model has been extensively discussed(or accepted).However,we argue that:(ⅰ)Calculating magnetic fields by assuming that rotational energy loss is dominated by dipole radiation(i.e.,E_(rot)■E_(μ))may be controversial,and we suggest that the energies carried by outflowing particles should also be considered.(ⅱ)The fact that X-ray luminosity is greater than the rotational energy loss rate does not necessarily mean that the emission energy comes from the magnetic field decaying,which requires further observational testing.Furthermore,some observational facts conflict with the“magnetar”model,such as observations of anti-magnetars,high magnetic field pulsars,and radio and X-ray observations of AXPs/SGRs.Therefore,we propose a crusted strange star model as an alternative,which can explain many more observational facts of AXPs/SGRs.展开更多
In this paper,we utilize the theory of Kurzweil-Henstock integrals to investigate new criteria for boundedness in terms of two measures for generalized ordinary differential equations.As applications,we establish crit...In this paper,we utilize the theory of Kurzweil-Henstock integrals to investigate new criteria for boundedness in terms of two measures for generalized ordinary differential equations.As applications,we establish criteria for(h0,h)-uniform boundedness and(h0,h)-uniform ultimate boundedness in terms of two measures for impulsive differential equations.展开更多
Cardiac arrhythmia is an abnormal rate and/or rhythm of a heart due to its abnormal electrical impulse origination and/or propagation. Various etiologies can cause arrhythmias. Heart failure （HF） is a clinical syndr...Cardiac arrhythmia is an abnormal rate and/or rhythm of a heart due to its abnormal electrical impulse origination and/or propagation. Various etiologies can cause arrhythmias. Heart failure （HF） is a clinical syndrome due to an impaired heart that can not pump sufficient blood to meet the systemic metabolic needs.展开更多
Objective: To observe the effects of Lüfukang Capsules (律复康胶囊 LFKC) on arrhythmia induced by ligation of coronary artery in dogs. Methods: Thirty dogs were randomly divided into 5 groups, the model group adm...Objective: To observe the effects of Lüfukang Capsules (律复康胶囊 LFKC) on arrhythmia induced by ligation of coronary artery in dogs. Methods: Thirty dogs were randomly divided into 5 groups, the model group administrated with equal volume of distilled water, the positive control group administrated with Wenxin Granules (稳心颗粒), and the small, medium and large dosage LFKC groups, 6 dogs in each group. Thirty minutes after medication, electrocardiogram was conducted and the time of arrhythmia occurrence, times of ventricular premature beat (VP), and incidence rates of ventricular tachycardia (VT) and ventricular fibrillation (VF) were recorded in the model dogs with arrhythmia induced by ligation of coronary artery. Results: Compared with the model group, the occurrence time of arrhythmia induced by the coronary artery ligation in the medium and large LFKC groups was significantly delayed (20.45±9.10 and 19.92±3.78, respectively, both P<0.05). The frequency of VP in the medium and large LFKC groups was also significantly decreased (8.17±6.62 and 3.83±2.79, respectively, both P<0.01). Conclusion: LFKC has anti-arrhythmic effects for the experimental arrhythmia induced by the ligation of coronary artery in dogs.展开更多
An 82-year-old female patient undergoing cardiogenic shock caused by atrioventficular junctional rhythm immediately after percutaneous coronary intervention （PCI） is described. Pharmacotherapy was invalid, and subse...An 82-year-old female patient undergoing cardiogenic shock caused by atrioventficular junctional rhythm immediately after percutaneous coronary intervention （PCI） is described. Pharmacotherapy was invalid, and subsequent application of atrial pacing reversed the cardiogenic shock. PCI-related injury of sinuatrial nodal artery leading to acute atrial contractility loss, accompanied by atrioventricular junctional arrhythmia, was diagnosed. We recommend that preoperative risk evaluation be required for multi-risk patients. Likewise, emergent measures should to be established in advance. This case reminds us that atrial pacing can be an optimal management technique once cardiogenic shock has occurred.展开更多
In the present letters we study the propagation of smooth pulses in anomalously dispersive media. We prove that non-analytical but smooth points in a pulse still propagate with the vacuum speed of light, c. It gives a...In the present letters we study the propagation of smooth pulses in anomalously dispersive media. We prove that non-analytical but smooth points in a pulse still propagate with the vacuum speed of light, c. It gives an upper limit for signal velocity as well as the non-continuous points of the envelop of a pulse or its derivatives of arbitrary order do.展开更多
We demonstrate the generation of supercontinuum(SC) spectrum covering S+C+L band of optical communication by injecting 1.4 ps optical pulses with center wavelength of 1552 nm and repetition rate of 10 GHz into an all-...We demonstrate the generation of supercontinuum(SC) spectrum covering S+C+L band of optical communication by injecting 1.4 ps optical pulses with center wavelength of 1552 nm and repetition rate of 10 GHz into an all-normal dispersion photonic crystal fiber(PCF) with length of 80 m. The experimental results are in good agreement with the numerical simulations, which are used to illustrate the SC generation dynamics by self-phase modulation and optical wave breaking(WB).展开更多
Background： Slow arrhythmia, a common clinical condition, has a higher incidence in the elderly population. Shenxian Shengmai Oral Liquid has been shown to improve the symptoms of patients with slow arrhythmia in man...Background： Slow arrhythmia, a common clinical condition, has a higher incidence in the elderly population. Shenxian Shengmai Oral Liquid has been shown to improve the symptoms of patients with slow arrhythmia in many clinical studies and systematic reviews. Sixty participants with slow arrhythmia will be randomized to treatment group （Shenxian Shengmai Oral Liquid） and control group （Shenxian Shengmai Oral Liquid Placebo） in a 2：1 ratio. This clinical trial is a pilot study to compare the effects of Shenxian Shengmai Oral Liquid and the control groups; to analyze the effect of Shenxian Shengmai Oral Liquid for slow arrhythmia.展开更多
基金supported by the National Natural Science Foundation of China(12273008,12025303,12403046)the National SKA Program of China(2022SKA0130104)+3 种基金the Natural Science and Technology Foundation of Guizhou Province(QiankehejichuMS[2025]266,[2023]024,ZK[2022]304)the Foundation of Guizhou Provincial Education Department(KY(2020)003)the Academic New Seedling Fund Project of Guizhou Normal University([2022]B18)the Major Science and Technology Program of Xinjiang Uygur Autonomous Region(2022A03013-4).
文摘The emission of anomalous X-ray pulsars(AXPs)and soft gamma-ray repeaters(SGRs)is believed to be powered by the dissipation of their strong magnetic fields,which coined the name“magnetar”.By combining timing and energy observational results,the magnetar model can be easily appreciated.From a timing perspective,the magnetic field strengths of AXPs and SGRs,which are calculated under the assumption of dipole radiation,are extremely strong.From an energy perspective,the X-ray/soft gamma-ray luminosities of AXPs and SGRs are larger than their rotational energy loss rates(i.e.,L_(x>E_(rot)).It is thus reasonable to assume that the high-energy radiation comes from magnetic energy decay,and the magnetar model has been extensively discussed(or accepted).However,we argue that:(ⅰ)Calculating magnetic fields by assuming that rotational energy loss is dominated by dipole radiation(i.e.,E_(rot)■E_(μ))may be controversial,and we suggest that the energies carried by outflowing particles should also be considered.(ⅱ)The fact that X-ray luminosity is greater than the rotational energy loss rate does not necessarily mean that the emission energy comes from the magnetic field decaying,which requires further observational testing.Furthermore,some observational facts conflict with the“magnetar”model,such as observations of anti-magnetars,high magnetic field pulsars,and radio and X-ray observations of AXPs/SGRs.Therefore,we propose a crusted strange star model as an alternative,which can explain many more observational facts of AXPs/SGRs.
基金supported by the Natural Science Foundation of Zhejiang Province(No.LY19A010013)。
文摘In this paper,we utilize the theory of Kurzweil-Henstock integrals to investigate new criteria for boundedness in terms of two measures for generalized ordinary differential equations.As applications,we establish criteria for(h0,h)-uniform boundedness and(h0,h)-uniform ultimate boundedness in terms of two measures for impulsive differential equations.
文摘Cardiac arrhythmia is an abnormal rate and/or rhythm of a heart due to its abnormal electrical impulse origination and/or propagation. Various etiologies can cause arrhythmias. Heart failure （HF） is a clinical syndrome due to an impaired heart that can not pump sufficient blood to meet the systemic metabolic needs.
基金supported by Plan for Science and Technology Innovation Talented Persons of Henan Province of China (No. 0621002700)
文摘Objective: To observe the effects of Lüfukang Capsules (律复康胶囊 LFKC) on arrhythmia induced by ligation of coronary artery in dogs. Methods: Thirty dogs were randomly divided into 5 groups, the model group administrated with equal volume of distilled water, the positive control group administrated with Wenxin Granules (稳心颗粒), and the small, medium and large dosage LFKC groups, 6 dogs in each group. Thirty minutes after medication, electrocardiogram was conducted and the time of arrhythmia occurrence, times of ventricular premature beat (VP), and incidence rates of ventricular tachycardia (VT) and ventricular fibrillation (VF) were recorded in the model dogs with arrhythmia induced by ligation of coronary artery. Results: Compared with the model group, the occurrence time of arrhythmia induced by the coronary artery ligation in the medium and large LFKC groups was significantly delayed (20.45±9.10 and 19.92±3.78, respectively, both P<0.05). The frequency of VP in the medium and large LFKC groups was also significantly decreased (8.17±6.62 and 3.83±2.79, respectively, both P<0.01). Conclusion: LFKC has anti-arrhythmic effects for the experimental arrhythmia induced by the ligation of coronary artery in dogs.
文摘An 82-year-old female patient undergoing cardiogenic shock caused by atrioventficular junctional rhythm immediately after percutaneous coronary intervention （PCI） is described. Pharmacotherapy was invalid, and subsequent application of atrial pacing reversed the cardiogenic shock. PCI-related injury of sinuatrial nodal artery leading to acute atrial contractility loss, accompanied by atrioventricular junctional arrhythmia, was diagnosed. We recommend that preoperative risk evaluation be required for multi-risk patients. Likewise, emergent measures should to be established in advance. This case reminds us that atrial pacing can be an optimal management technique once cardiogenic shock has occurred.
文摘In the present letters we study the propagation of smooth pulses in anomalously dispersive media. We prove that non-analytical but smooth points in a pulse still propagate with the vacuum speed of light, c. It gives an upper limit for signal velocity as well as the non-continuous points of the envelop of a pulse or its derivatives of arbitrary order do.
基金supported by the Guangdong Science and Technology Program(No.2012B090600009)the Guangdong Natural Science Fund(No.10451170003004948)
文摘We demonstrate the generation of supercontinuum(SC) spectrum covering S+C+L band of optical communication by injecting 1.4 ps optical pulses with center wavelength of 1552 nm and repetition rate of 10 GHz into an all-normal dispersion photonic crystal fiber(PCF) with length of 80 m. The experimental results are in good agreement with the numerical simulations, which are used to illustrate the SC generation dynamics by self-phase modulation and optical wave breaking(WB).
文摘Background： Slow arrhythmia, a common clinical condition, has a higher incidence in the elderly population. Shenxian Shengmai Oral Liquid has been shown to improve the symptoms of patients with slow arrhythmia in many clinical studies and systematic reviews. Sixty participants with slow arrhythmia will be randomized to treatment group （Shenxian Shengmai Oral Liquid） and control group （Shenxian Shengmai Oral Liquid Placebo） in a 2：1 ratio. This clinical trial is a pilot study to compare the effects of Shenxian Shengmai Oral Liquid and the control groups; to analyze the effect of Shenxian Shengmai Oral Liquid for slow arrhythmia.
