In recent decades, acupuncture has been used more widely and extensively in the United States （U.S.）. However, there have been no national surveys or analyses reported in academic journals on the number of practicin...In recent decades, acupuncture has been used more widely and extensively in the United States （U.S.）. However, there have been no national surveys or analyses reported in academic journals on the number of practicing or licensed acupuncturists, This study was conducted to identify the approximate number of licensed acupuncturists active in 2015. The Board of Acupuncture or Board of Medicine in each state or U.S. territory was contacted to collect data, Online license information searching was also performed in order to get accurate numbers of licensed acupuncturists for those states in which a board was unable to be contacted. The study found that the number of licensed acupuncturists in 2015 in the U,S, was 34,481. Of this, more than 50% were licensed in three states alone： California （32.39%）, New York （11,89%） and Florida （7.06%）. The number of licensed acupuncturists increased 23.30% and 52.09%, compared to the year 2009 （n = 27,965） and 2004 （n = 22,671）, respectively; increasing about 1,266 per year. There were 62 and 10 accredited acupuncture institutions providing master and doctoral degrees, respectively. The West Coast comprised 51.39% of degree granting programs, while the East Coast comprised 29.17%; together the coastal states housed more than 80% of all programs, with the remainder sprinkled across the southern （9.72%）, northern （8.33%）, and the middle/central states （1.39%）. Forty-four states and the District of Columbia regulated acupuncture practice by law at the time of data collection. Acupuncture continues to be a quickly growing profession in the U.S,展开更多
With the increasing penetration of renewable energy,the coordination of energy storage with thermal power for frequency regulation has become an effective means to enhance grid frequency security.Addressing the challe...With the increasing penetration of renewable energy,the coordination of energy storage with thermal power for frequency regulation has become an effective means to enhance grid frequency security.Addressing the challenge of improving the frequency regulation performance of a thermal-storage primary frequency regulation system while reducing its associated losses,this paper proposes a multi-dimensional cooperative optimization strategy for the control parameters of a combined thermal-storage system,considering regulation losses.First,the frequency regulation losses of various components within the thermal power unit are quantified,and a calculation method for energy storage regulation loss is proposed,based on Depth of Discharge(DOD)and C-rate.Second,a thermal-storage cooperative control method based on series compensation is developed to improve the system’s frequency regulation performance.Third,targeting system regulation loss cost and regulation output,and considering constraints on output overshoot and system parameters,an improved Particle Swarm Optimization(PSO)algorithm is employed to tune the parameters of the low-pass filter and the series compensator,thereby reducing regulation losses while enhancing performance.Finally,simulation results demonstrate that the total loss cost of the proposed control strategy is comparable to that of a system with only thermal power participation.However,the thermal power loss cost is reduced by 42.16%compared to the thermal-only case,while simultaneously improving system frequency stability.Thus,the proposed strategy effectively balances system frequency stability and economic efficiency.展开更多
文摘In recent decades, acupuncture has been used more widely and extensively in the United States （U.S.）. However, there have been no national surveys or analyses reported in academic journals on the number of practicing or licensed acupuncturists, This study was conducted to identify the approximate number of licensed acupuncturists active in 2015. The Board of Acupuncture or Board of Medicine in each state or U.S. territory was contacted to collect data, Online license information searching was also performed in order to get accurate numbers of licensed acupuncturists for those states in which a board was unable to be contacted. The study found that the number of licensed acupuncturists in 2015 in the U,S, was 34,481. Of this, more than 50% were licensed in three states alone： California （32.39%）, New York （11,89%） and Florida （7.06%）. The number of licensed acupuncturists increased 23.30% and 52.09%, compared to the year 2009 （n = 27,965） and 2004 （n = 22,671）, respectively; increasing about 1,266 per year. There were 62 and 10 accredited acupuncture institutions providing master and doctoral degrees, respectively. The West Coast comprised 51.39% of degree granting programs, while the East Coast comprised 29.17%; together the coastal states housed more than 80% of all programs, with the remainder sprinkled across the southern （9.72%）, northern （8.33%）, and the middle/central states （1.39%）. Forty-four states and the District of Columbia regulated acupuncture practice by law at the time of data collection. Acupuncture continues to be a quickly growing profession in the U.S,
基金supported by the Science and Technology Development Project of Jilin Province(Project No.YDZJ202301ZYTS284).
文摘With the increasing penetration of renewable energy,the coordination of energy storage with thermal power for frequency regulation has become an effective means to enhance grid frequency security.Addressing the challenge of improving the frequency regulation performance of a thermal-storage primary frequency regulation system while reducing its associated losses,this paper proposes a multi-dimensional cooperative optimization strategy for the control parameters of a combined thermal-storage system,considering regulation losses.First,the frequency regulation losses of various components within the thermal power unit are quantified,and a calculation method for energy storage regulation loss is proposed,based on Depth of Discharge(DOD)and C-rate.Second,a thermal-storage cooperative control method based on series compensation is developed to improve the system’s frequency regulation performance.Third,targeting system regulation loss cost and regulation output,and considering constraints on output overshoot and system parameters,an improved Particle Swarm Optimization(PSO)algorithm is employed to tune the parameters of the low-pass filter and the series compensator,thereby reducing regulation losses while enhancing performance.Finally,simulation results demonstrate that the total loss cost of the proposed control strategy is comparable to that of a system with only thermal power participation.However,the thermal power loss cost is reduced by 42.16%compared to the thermal-only case,while simultaneously improving system frequency stability.Thus,the proposed strategy effectively balances system frequency stability and economic efficiency.
