Based on the experimental results, in which the fabricated error of the double layer frequency selective surface (FSS) leads to the transmission loss and the resonant frequency leaves away the design resonant frequenc...Based on the experimental results, in which the fabricated error of the double layer frequency selective surface (FSS) leads to the transmission loss and the resonant frequency leaves away the design resonant frequency, the inter-layer separation distance (ISD) and the unit cell aligning error (UAE) were used as main variables to study the transmission performance attenuation of the double layer FSS configuration. The numerical analysis model for ISD and UAE was established and also was used to simulate the ring unit cell FSS transmission performance by the finite element and periodic moment methods. The double layer ring aperture FSS configuration designed was used as the numerical model. As a result of the numerical analysis, it is shown that both ISD and UAE produce insertion transmission loss (ITL) and insertion phase distortion (IPD) directly. Furthermore, ISD results in more loss of the amplitude of the transmitted signal for the FSS than UAE. It is significant for the designer of the multiplayer FSS to assign the fabricated error of the FSS dielectric layers. The UAE introduces the insertion phase variation badly.展开更多
Flame spray synthesis (FSS), a combination of the flame spray technology and Self-propagation High-temperature Synthesis (SHS) was developed for preparing fine-ceramic-containing composite coatings. It can simplify th...Flame spray synthesis (FSS), a combination of the flame spray technology and Self-propagation High-temperature Synthesis (SHS) was developed for preparing fine-ceramic-containing composite coatings. It can simplify the preparations of powder to synthesize and deposit the desired materials in one step. The preliminary results obtained from TiC-Fe cermet coatings by FSS process are reported. The peculiar microstructure of the composite coatings, which contains very fine (<1m) and round TiC and alternate TiC-rich (Hv=11€*13GPa) and TiC-poor layers (Hv=3.0 -6.0GPa), is expected to play an important role in their tribological properties.展开更多
目的:通过临床研究,探究通督调神针刺对卒中后疲劳患者的疗效。方法:收纳60例脑卒中后疲劳患者,按照随机分配原则分为对照组和治疗组各30例。两组患者同时接受常规传统的康复训练,治疗组在此基础上加以通督调神针刺,每天1次,10天作为一...目的:通过临床研究,探究通督调神针刺对卒中后疲劳患者的疗效。方法:收纳60例脑卒中后疲劳患者,按照随机分配原则分为对照组和治疗组各30例。两组患者同时接受常规传统的康复训练,治疗组在此基础上加以通督调神针刺,每天1次,10天作为一个疗程,连续治疗2个疗程,疗程间间歇1天。通过使用疲劳严重程度量表(Fatigue Severity Scale,FSS)、脑卒中专用生活质量量表(Stroke-specific Quality of Life Scale, SS-QOL)以及常用的美国国立卫生研究院发表的卒中量表(National Institutes of Health Stroke Scale, NIHSS)对两组患者治疗前后的疲劳程度水平进行评估。结果:治疗组干预2个疗程后,采用FSS,SS-QOL以及NIHSS进行综合评分,与同组治疗前进行对比,发现其差异均具备统计学意义(P <0.05)。治疗组干预2个疗程后采用FSS,SS-QOL以及NIHSS与对照组进行对比,差异均具备统计学意义(P <0.05)。论断:临床上选用通督调神针刺法能够有效的改进个人疲惫状态,显著降低脑卒中后疲劳水平,明显提升患者的生存质量。展开更多
文摘Based on the experimental results, in which the fabricated error of the double layer frequency selective surface (FSS) leads to the transmission loss and the resonant frequency leaves away the design resonant frequency, the inter-layer separation distance (ISD) and the unit cell aligning error (UAE) were used as main variables to study the transmission performance attenuation of the double layer FSS configuration. The numerical analysis model for ISD and UAE was established and also was used to simulate the ring unit cell FSS transmission performance by the finite element and periodic moment methods. The double layer ring aperture FSS configuration designed was used as the numerical model. As a result of the numerical analysis, it is shown that both ISD and UAE produce insertion transmission loss (ITL) and insertion phase distortion (IPD) directly. Furthermore, ISD results in more loss of the amplitude of the transmitted signal for the FSS than UAE. It is significant for the designer of the multiplayer FSS to assign the fabricated error of the FSS dielectric layers. The UAE introduces the insertion phase variation badly.
文摘Flame spray synthesis (FSS), a combination of the flame spray technology and Self-propagation High-temperature Synthesis (SHS) was developed for preparing fine-ceramic-containing composite coatings. It can simplify the preparations of powder to synthesize and deposit the desired materials in one step. The preliminary results obtained from TiC-Fe cermet coatings by FSS process are reported. The peculiar microstructure of the composite coatings, which contains very fine (<1m) and round TiC and alternate TiC-rich (Hv=11€*13GPa) and TiC-poor layers (Hv=3.0 -6.0GPa), is expected to play an important role in their tribological properties.
文摘目的:通过临床研究,探究通督调神针刺对卒中后疲劳患者的疗效。方法:收纳60例脑卒中后疲劳患者,按照随机分配原则分为对照组和治疗组各30例。两组患者同时接受常规传统的康复训练,治疗组在此基础上加以通督调神针刺,每天1次,10天作为一个疗程,连续治疗2个疗程,疗程间间歇1天。通过使用疲劳严重程度量表(Fatigue Severity Scale,FSS)、脑卒中专用生活质量量表(Stroke-specific Quality of Life Scale, SS-QOL)以及常用的美国国立卫生研究院发表的卒中量表(National Institutes of Health Stroke Scale, NIHSS)对两组患者治疗前后的疲劳程度水平进行评估。结果:治疗组干预2个疗程后,采用FSS,SS-QOL以及NIHSS进行综合评分,与同组治疗前进行对比,发现其差异均具备统计学意义(P <0.05)。治疗组干预2个疗程后采用FSS,SS-QOL以及NIHSS与对照组进行对比,差异均具备统计学意义(P <0.05)。论断:临床上选用通督调神针刺法能够有效的改进个人疲惫状态,显著降低脑卒中后疲劳水平,明显提升患者的生存质量。
