Objective:To observe the differences in clinical therapeutic effect on acute attack of lumbar disc herniation(LDH) treated with electroacupuncture(EA) of different wave patterns so as to optimize EA wave pattern in th...Objective:To observe the differences in clinical therapeutic effect on acute attack of lumbar disc herniation(LDH) treated with electroacupuncture(EA) of different wave patterns so as to optimize EA wave pattern in the treatment of acute attack of LDH.Methods:A total of 108 patients were randomized into three groups,i.e.,a disperse-dense wave,an intermittent wave and a continuous wave group,36 cases in each one.In all of three groups,Shangliao(上髎BL31),Ciliao(次髎BL32),Zhongliao(中髎BL33) and Xialiao(下髎BL34) were selected bilaterally as the main acupoints,which is generally termed as Baliao(八髎BL31 to BL34,bilateral).In each group,the corresponding wave pattern was used in EA.The treatment lasted 20 min each time,once daily,totally for 10 days.Before and after treatment,the score of visual analogue scale(VAS) and the score of the lower back pain of Japanese orthopedic association(JOA) were observed in the patients of three groups and the overall therapeutic effect was evaluated.Results:After treatment,the VAS score was decreased and JOA score was increased in the patients of 3 groups,indicating statistical significance(all P <0.05).In comparison of VAS score before and after treatment among three groups,the score in the disperse-dense wave group was higher than the intermittent wave group and the continuous wave group,indicating statistical differences(both P <0.05).In comparison of JOA score before and after treatment among three groups,the score in the continuous wave group was higher than the intermittent wave group and the disperse-dense wave group,indicating statistical differences(both P <0.05).The total effective rate was 94.12% in the disperse-dense wave group,94.29% in the intermittent wave group and 97.14% in continuous wave group,without significant difference among groups(P> 0.05).Conclusion:Electroacupuncture of 3 different wave patterns all effectively relieves clinical symptoms of acute attack of lumbar disc herniation.Regarding pain release,electroacupuncture with disperse-dense wave展开更多
The Shimian area of Sichuan sits at the junction of the Bayan Har block.Sichuan-Yunnan rhombic block,and Yangtze block,where several faults intersect.This region features intense tectonic activity and frequent earthqu...The Shimian area of Sichuan sits at the junction of the Bayan Har block.Sichuan-Yunnan rhombic block,and Yangtze block,where several faults intersect.This region features intense tectonic activity and frequent earthquakes.In this study,we used local seismic waveform data recorded using dense arrays deployed in the Shimian area to obtain the shear wave splitting parameters at 55 seismic stations and thereby determine the crustal anisotropic characteristics of the region.We then analyzed the crustal stress pattern and tectonic setting and explored their relationship in the study area.Although some stations returned a polarization direction of NNW-SSE.a dominant polarization direction of NW-SE was obtained for the fast shear wave at most seismic stations in the study area.The polarization directions of the fast shear wave were highly consistent throughout the study-area.This orientation was in accordance with the direction of the regional principal compressive stress and parallel to the trend of the Xianshuihe and Daliangshan faults.The distribution of crustal anisotropy in this area was affected by the regional tectonic stress field and the fault structures.The mean delay time between fast and slow shear waves was 3.83 ms/km.slightly greater than the values obtained in other regions of Sichuan.This indicates that the crustal media in our study area had a high anisotropic strength and also reveals the influence of tectonic complexity resulting from the intersection of multiple faults on the strength of seismic anisotropy.展开更多
The propagation of a normal incident electromagnetic plane wave in a mixture of rare plasma and dense neutral gas is investigated by one dimensional model. The numerical results show that the amplitude of wave electri...The propagation of a normal incident electromagnetic plane wave in a mixture of rare plasma and dense neutral gas is investigated by one dimensional model. The numerical results show that the amplitude of wave electric field is decayed dramatically and its phase is modulated obviously in a distance of a few wave lengthes due to the frequent collisions between electrons and neutrals ( the collision frequency vc is near or even larger than the wave frequency ω0).展开更多
Objective:To explore the treatment effects of electroacupuncture(EA),acupuncture with filiform needle,and western medication for knee osteoarthritis(KOA).Methods:It was a randomized,controlled trial with the blinding ...Objective:To explore the treatment effects of electroacupuncture(EA),acupuncture with filiform needle,and western medication for knee osteoarthritis(KOA).Methods:It was a randomized,controlled trial with the blinding of outcome assessors and statistician.90 outpatients were diagnosed as KOA in Department of Acupuncture and Moxibustion,the First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine.Using the random number table,they were divided into a medication group,an acupuncture group and an EA group,30 cases in each one.In the medication group,routine medication was provided with oral administration of celebrex for 21 days.Regular acupuncture was applied in the remaining groups,at Liángqiū(梁丘ST34),Xuèhǎi(血海SP10),Dúbí(犊鼻ST35),Nèixīyǎn(内膝眼EX-LE4),Yánglíngquán(阳陵泉GB34),Hèdǐng(鹤顶EX-LE2)and Sānyīnjiāo(三阴交SP6)and the needles were retained for 30 min.In the EA group,electric stimulation with low-frequency pulse current and dense wave was applied for 30 min on the basis of the treatment of the acupuncture group.The treatment was applied once daily at 1-day intervals after each 6-day treatment for a total of 21 days.Western Ontario and McMaster University Osteoarthritis Index(WOMAC)and visual analogy scale(VAS)scores and levels of serum inflammatory factors(interleukin-1β[IL-1β]and tumor necrosis factor[TNF-α])were used to assess the clinical therapeutic effect.Results:Following treatment,there were significant differences in the WOMAC score in the medication,acupuncture,and EA groups after treatment(all P<0.01).In the comparison among groups,after treatment,the WOMAC score in the EA group was lower than that in either the acupuncture or medication group(both P<0.01).Compared to before treatment,VAS scores were significantly different in the medication group(3.95±0.55 vs 5.75±1.40),the acupuncture group(2.78±0.38 vs 5.78±1.44)and EA group(1.72±0.38 vs 5.78±1.39)separately after treatment(all P<0.01).In the comparison among groups,aft展开更多
The Ningdu basin,located in southern Jiangxi province of southwest China,is one of the Mesozoic basin groups which has exploration prospects for geothermal energy.A study on the detailed velocity structure of the Ning...The Ningdu basin,located in southern Jiangxi province of southwest China,is one of the Mesozoic basin groups which has exploration prospects for geothermal energy.A study on the detailed velocity structure of the Ningdu basin can provide important information for geothermal resource exploration.In this study,we deployed a dense seismic array in the Ningdu basin to investigate the 3D velocity structure and discuss implications for geothermal exploration and geological evolution.Based on the dense seismic array including 35 short-period(5 s-100 Hz)seismometers with an average interstation distance of~5 km,Rayleigh surface wave dispersion curves were extracted from the continuous ambient noise data for surface wave tomographic inversion.Group velocity tomography was conducted and the 3D S-wave velocity structure was inverted by the neighborhood algorithm.The results revealed obvious low-velocity anomalies in the center of the basin,consistent with the low-velocity Cretaceous sedimentary rocks.The basement and basin-controlling fault can also be depicted by the S-wave velocity anomalies.The obvious seismic interface is about 2 km depth in the basin center and decreases to 700 m depth near the basin boundary,suggesting spatial thickness variations of the Cretaceous sediment.The fault features of the S-wave velocity profile coincide with the geological cognition of the western boundary basincontrolling fault,which may provide possible upwelling channels for geothermal fluid.This study suggests that seismic tomography with a dense array is an effective method and can play an important role in the detailed investigations of sedimentary basins.展开更多
In order to reduce transmission loss of the optical waveguide in Mach-Zehnder (M-Z) electro-optical (EO) polymer modulator,the basic iterative formula of semi-vector finite-difference beam propagation method (FD-BPM) ...In order to reduce transmission loss of the optical waveguide in Mach-Zehnder (M-Z) electro-optical (EO) polymer modulator,the basic iterative formula of semi-vector finite-difference beam propagation method (FD-BPM) is obtained from the scalar wave equation. The transition waveguide is combined with S-type bend branch waveguide for the M-Z EO modulator in the branch waveguide. The effects of structure parameters such as ridge width,length of the branch waveguide and interferometer spacing on the transmission loss are systematically studied by using the semi-vector FD-BPM method. The structure is optimized as an S-sine bend branch waveguide,with rib width w=7μm,length of branch waveguide L=1200μm and interferometer spacing G=22 μm. The results show that the optimized structure can reduce transmission loss to 0.083 dB,which have a certain reference value to the design of optical waveguide in M-Z polymer modulator.展开更多
An ultra-dense network scenario is a scene where a large number of people assemble in a limited area to generate centralized broadband data traffic requirements.Because ultra-dense networks generate enormous traffic p...An ultra-dense network scenario is a scene where a large number of people assemble in a limited area to generate centralized broadband data traffic requirements.Because ultra-dense networks generate enormous traffic pressure,traditional network capabilities are not enough to accommodate the user s needs.Based on the description of ultra-dense network architecture,we analyze millimeter wave radio spectrum,high gain beam forming,physical layer frame structure,resource concentration and edge computing technology.In addition,the cooperative technology required by overlay and interference symbiosis in the dense network architecture as well as the access control technology of centralized access is analyzed and discussed comprehensively.展开更多
This paper reports the implementation and theoretical model for analyzing an optical CDMA/DWDM hybrid system to reduce two major problems,the Inter-Symbol Interference(ISI)and the Four-Wave Mixing(FWM)effects and impr...This paper reports the implementation and theoretical model for analyzing an optical CDMA/DWDM hybrid system to reduce two major problems,the Inter-Symbol Interference(ISI)and the Four-Wave Mixing(FWM)effects and improve the performance of optical subscriber access networks by using Zero Cross-Correlation(ZCC)optical codes,which helps to reduce the effect of the Multiple Access Interference(MAI).A squeezing method is used in the proposed hybrid system to completely suppress the ISI.In this method,the sequence interval of the signature code is squeezed into a duration of less than one-bit.The hybrid system is capable of accommodating 120 optical CDMA users carried by only 10 DWDM wavelengths spaced by 0.2 nm with 60 Gb/s/wavelength transmitted over 105.075 km of optical fiber.The result shows that the optimum interval of the code sequence is a quarter(i.e.,25%)of the bit duration.Moreover,the results reveal that the CDMA technology based on the spread spectrum is capable of increasing the nonlinear tolerance of the proposed hybrid system as the energy of bits is distributed over the chip sequence code.Also,the number of ones/weight and the positions between them have a significant effect on the performance of the proposed hybrid system.展开更多
文摘Objective:To observe the differences in clinical therapeutic effect on acute attack of lumbar disc herniation(LDH) treated with electroacupuncture(EA) of different wave patterns so as to optimize EA wave pattern in the treatment of acute attack of LDH.Methods:A total of 108 patients were randomized into three groups,i.e.,a disperse-dense wave,an intermittent wave and a continuous wave group,36 cases in each one.In all of three groups,Shangliao(上髎BL31),Ciliao(次髎BL32),Zhongliao(中髎BL33) and Xialiao(下髎BL34) were selected bilaterally as the main acupoints,which is generally termed as Baliao(八髎BL31 to BL34,bilateral).In each group,the corresponding wave pattern was used in EA.The treatment lasted 20 min each time,once daily,totally for 10 days.Before and after treatment,the score of visual analogue scale(VAS) and the score of the lower back pain of Japanese orthopedic association(JOA) were observed in the patients of three groups and the overall therapeutic effect was evaluated.Results:After treatment,the VAS score was decreased and JOA score was increased in the patients of 3 groups,indicating statistical significance(all P <0.05).In comparison of VAS score before and after treatment among three groups,the score in the disperse-dense wave group was higher than the intermittent wave group and the continuous wave group,indicating statistical differences(both P <0.05).In comparison of JOA score before and after treatment among three groups,the score in the continuous wave group was higher than the intermittent wave group and the disperse-dense wave group,indicating statistical differences(both P <0.05).The total effective rate was 94.12% in the disperse-dense wave group,94.29% in the intermittent wave group and 97.14% in continuous wave group,without significant difference among groups(P> 0.05).Conclusion:Electroacupuncture of 3 different wave patterns all effectively relieves clinical symptoms of acute attack of lumbar disc herniation.Regarding pain release,electroacupuncture with disperse-dense wave
基金This work is jointly supported by the National Natural Science Foundation of China(No.41904057)the National Key Research and Development Program of China(No.2018YFC1503402).
文摘The Shimian area of Sichuan sits at the junction of the Bayan Har block.Sichuan-Yunnan rhombic block,and Yangtze block,where several faults intersect.This region features intense tectonic activity and frequent earthquakes.In this study,we used local seismic waveform data recorded using dense arrays deployed in the Shimian area to obtain the shear wave splitting parameters at 55 seismic stations and thereby determine the crustal anisotropic characteristics of the region.We then analyzed the crustal stress pattern and tectonic setting and explored their relationship in the study area.Although some stations returned a polarization direction of NNW-SSE.a dominant polarization direction of NW-SE was obtained for the fast shear wave at most seismic stations in the study area.The polarization directions of the fast shear wave were highly consistent throughout the study-area.This orientation was in accordance with the direction of the regional principal compressive stress and parallel to the trend of the Xianshuihe and Daliangshan faults.The distribution of crustal anisotropy in this area was affected by the regional tectonic stress field and the fault structures.The mean delay time between fast and slow shear waves was 3.83 ms/km.slightly greater than the values obtained in other regions of Sichuan.This indicates that the crustal media in our study area had a high anisotropic strength and also reveals the influence of tectonic complexity resulting from the intersection of multiple faults on the strength of seismic anisotropy.
文摘The propagation of a normal incident electromagnetic plane wave in a mixture of rare plasma and dense neutral gas is investigated by one dimensional model. The numerical results show that the amplitude of wave electric field is decayed dramatically and its phase is modulated obviously in a distance of a few wave lengthes due to the frequent collisions between electrons and neutrals ( the collision frequency vc is near or even larger than the wave frequency ω0).
基金Supported by Scientific Research Project of Heilongjiang Provincial Administration of Traditional Chinese MedicineZHY2020-119Heilongjiang Province Postdoctoral Scientific Research Launch Fund ProjectLBH-Q16216。
文摘Objective:To explore the treatment effects of electroacupuncture(EA),acupuncture with filiform needle,and western medication for knee osteoarthritis(KOA).Methods:It was a randomized,controlled trial with the blinding of outcome assessors and statistician.90 outpatients were diagnosed as KOA in Department of Acupuncture and Moxibustion,the First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine.Using the random number table,they were divided into a medication group,an acupuncture group and an EA group,30 cases in each one.In the medication group,routine medication was provided with oral administration of celebrex for 21 days.Regular acupuncture was applied in the remaining groups,at Liángqiū(梁丘ST34),Xuèhǎi(血海SP10),Dúbí(犊鼻ST35),Nèixīyǎn(内膝眼EX-LE4),Yánglíngquán(阳陵泉GB34),Hèdǐng(鹤顶EX-LE2)and Sānyīnjiāo(三阴交SP6)and the needles were retained for 30 min.In the EA group,electric stimulation with low-frequency pulse current and dense wave was applied for 30 min on the basis of the treatment of the acupuncture group.The treatment was applied once daily at 1-day intervals after each 6-day treatment for a total of 21 days.Western Ontario and McMaster University Osteoarthritis Index(WOMAC)and visual analogy scale(VAS)scores and levels of serum inflammatory factors(interleukin-1β[IL-1β]and tumor necrosis factor[TNF-α])were used to assess the clinical therapeutic effect.Results:Following treatment,there were significant differences in the WOMAC score in the medication,acupuncture,and EA groups after treatment(all P<0.01).In the comparison among groups,after treatment,the WOMAC score in the EA group was lower than that in either the acupuncture or medication group(both P<0.01).Compared to before treatment,VAS scores were significantly different in the medication group(3.95±0.55 vs 5.75±1.40),the acupuncture group(2.78±0.38 vs 5.78±1.44)and EA group(1.72±0.38 vs 5.78±1.39)separately after treatment(all P<0.01).In the comparison among groups,aft
基金supported by China Geological Survey (DD20190083, DD20221662)National Natural Science Foundation of China (41904044, 41974064, 42174076, 41874069)Youth Innovation Promotion Association CAS (2019330).
文摘The Ningdu basin,located in southern Jiangxi province of southwest China,is one of the Mesozoic basin groups which has exploration prospects for geothermal energy.A study on the detailed velocity structure of the Ningdu basin can provide important information for geothermal resource exploration.In this study,we deployed a dense seismic array in the Ningdu basin to investigate the 3D velocity structure and discuss implications for geothermal exploration and geological evolution.Based on the dense seismic array including 35 short-period(5 s-100 Hz)seismometers with an average interstation distance of~5 km,Rayleigh surface wave dispersion curves were extracted from the continuous ambient noise data for surface wave tomographic inversion.Group velocity tomography was conducted and the 3D S-wave velocity structure was inverted by the neighborhood algorithm.The results revealed obvious low-velocity anomalies in the center of the basin,consistent with the low-velocity Cretaceous sedimentary rocks.The basement and basin-controlling fault can also be depicted by the S-wave velocity anomalies.The obvious seismic interface is about 2 km depth in the basin center and decreases to 700 m depth near the basin boundary,suggesting spatial thickness variations of the Cretaceous sediment.The fault features of the S-wave velocity profile coincide with the geological cognition of the western boundary basincontrolling fault,which may provide possible upwelling channels for geothermal fluid.This study suggests that seismic tomography with a dense array is an effective method and can play an important role in the detailed investigations of sedimentary basins.
基金supported by the National High Technology Research and Development Program of China (No.2009AA03Z413)
文摘In order to reduce transmission loss of the optical waveguide in Mach-Zehnder (M-Z) electro-optical (EO) polymer modulator,the basic iterative formula of semi-vector finite-difference beam propagation method (FD-BPM) is obtained from the scalar wave equation. The transition waveguide is combined with S-type bend branch waveguide for the M-Z EO modulator in the branch waveguide. The effects of structure parameters such as ridge width,length of the branch waveguide and interferometer spacing on the transmission loss are systematically studied by using the semi-vector FD-BPM method. The structure is optimized as an S-sine bend branch waveguide,with rib width w=7μm,length of branch waveguide L=1200μm and interferometer spacing G=22 μm. The results show that the optimized structure can reduce transmission loss to 0.083 dB,which have a certain reference value to the design of optical waveguide in M-Z polymer modulator.
文摘An ultra-dense network scenario is a scene where a large number of people assemble in a limited area to generate centralized broadband data traffic requirements.Because ultra-dense networks generate enormous traffic pressure,traditional network capabilities are not enough to accommodate the user s needs.Based on the description of ultra-dense network architecture,we analyze millimeter wave radio spectrum,high gain beam forming,physical layer frame structure,resource concentration and edge computing technology.In addition,the cooperative technology required by overlay and interference symbiosis in the dense network architecture as well as the access control technology of centralized access is analyzed and discussed comprehensively.
基金This work was supported by Multimedia University(Malaysia),project SAP ID:MMUI/160092.
文摘This paper reports the implementation and theoretical model for analyzing an optical CDMA/DWDM hybrid system to reduce two major problems,the Inter-Symbol Interference(ISI)and the Four-Wave Mixing(FWM)effects and improve the performance of optical subscriber access networks by using Zero Cross-Correlation(ZCC)optical codes,which helps to reduce the effect of the Multiple Access Interference(MAI).A squeezing method is used in the proposed hybrid system to completely suppress the ISI.In this method,the sequence interval of the signature code is squeezed into a duration of less than one-bit.The hybrid system is capable of accommodating 120 optical CDMA users carried by only 10 DWDM wavelengths spaced by 0.2 nm with 60 Gb/s/wavelength transmitted over 105.075 km of optical fiber.The result shows that the optimum interval of the code sequence is a quarter(i.e.,25%)of the bit duration.Moreover,the results reveal that the CDMA technology based on the spread spectrum is capable of increasing the nonlinear tolerance of the proposed hybrid system as the energy of bits is distributed over the chip sequence code.Also,the number of ones/weight and the positions between them have a significant effect on the performance of the proposed hybrid system.
