The aim of the work was confined to the investigation of the epileptic activity dynamics under conditions of extremely high frequency electromagnetic waves(EHF) radiation(7.1 mm,0.1 mW/cm2) upon focal epileptic activi...The aim of the work was confined to the investigation of the epileptic activity dynamics under conditions of extremely high frequency electromagnetic waves(EHF) radiation(7.1 mm,0.1 mW/cm2) upon focal epileptic activity,which was penicillin-induced(10 000 IU/ml) in frontal zone of the brain cortex in myorelaxed and artificially ventilated rats under acute experimental condition.It was established that preliminarily performed hypogeomagnetic period(3.0 h) with the inductivity of geomagnetic field reduction not less than by 100 times caused the intensification of antiepileptic effects of EHF(15.0 min of exposition).It was pronounced in the form of decrease of foci intensity and significant reduction of life-span of foci-up to 115.3±13.4 minutes,which was both significant when compared with separate effects of hypogeomagnetic influence(187.3±12.5 min) and EHF(15.0 minutes of exposition) effect(164.2±12.5 minutes)(P <0.05).展开更多
Factors for determining the spindle size are the shaft diameter,positions of bearing and motor,and entire length of the spindle.Then,it is important to find the assembling of the optimal design variables,which satisfy...Factors for determining the spindle size are the shaft diameter,positions of bearing and motor,and entire length of the spindle.Then,it is important to find the assembling of the optimal design variables,which satisfy the stiffness and rotational speed required to the spindle.A general full factorial design method was used to verify some factors that affect the natural frequency of a spindle.It is verified that the shorter shaft length and bearing span length represent the higher natural frequency,and there are some effects according to the change in the levels of factors.The detailed spindle dimension is determined by applying an EVD method,which can define the optimal bearing position through considering the limiting condition.Based on the estimated regression model,the optimal spindle size and bearing distance that can improve the primary natural frequency are obtained,and the influence of design factors on the natural frequency is also analyzed.展开更多
目的探讨低功率极高频电磁波(extremely high frequency wave,EHFW)辐照对肿瘤化放疗患者免疫细胞表达的影响。方法62例恶性肿瘤化放疗患者按自愿和随机原则分为化放疗后极高频电磁复合波幅照组(联合治疗组)及单纯化放疗后观察组(单纯...目的探讨低功率极高频电磁波(extremely high frequency wave,EHFW)辐照对肿瘤化放疗患者免疫细胞表达的影响。方法62例恶性肿瘤化放疗患者按自愿和随机原则分为化放疗后极高频电磁复合波幅照组(联合治疗组)及单纯化放疗后观察组(单纯化放疗组)。联合治疗组患者于化放疗后配合以功率密度为10 mW/cm2的EHF波辐照。采用流式细胞术配比性(Matched-pair)检测患者EHF波辐照治疗前-后外周血免疫学指标。结果单纯化放疗组患者在化放疗后第8天,除CD3+、CD4+、CD8+T细胞表达率和CD4+/CD8+比值与化放疗后第3天水平相当外,其NK细胞、NKT细胞、B细胞表达率均明显低于化放疗后第3天水平(P<0.01);而EHF波辐照治疗5 d后,NK细胞表达水平显著高于化放疗后第3天(P<0.05);NKT细胞、B细胞、CD3+、CD4+、CD8+T细胞表达率和CD4+/CD8+比值均略高于化放疗后第3天水平,其前-后变化水平均未见统计学意义(P>0.05)。结论低功率EHF波配合化放疗治疗恶性肿瘤,可稳定和提高免疫细胞表达水平,对患者细胞免疫机能具有保护作用。展开更多
文摘The aim of the work was confined to the investigation of the epileptic activity dynamics under conditions of extremely high frequency electromagnetic waves(EHF) radiation(7.1 mm,0.1 mW/cm2) upon focal epileptic activity,which was penicillin-induced(10 000 IU/ml) in frontal zone of the brain cortex in myorelaxed and artificially ventilated rats under acute experimental condition.It was established that preliminarily performed hypogeomagnetic period(3.0 h) with the inductivity of geomagnetic field reduction not less than by 100 times caused the intensification of antiepileptic effects of EHF(15.0 min of exposition).It was pronounced in the form of decrease of foci intensity and significant reduction of life-span of foci-up to 115.3±13.4 minutes,which was both significant when compared with separate effects of hypogeomagnetic influence(187.3±12.5 min) and EHF(15.0 minutes of exposition) effect(164.2±12.5 minutes)(P <0.05).
基金Project(RTI04-01-03) supported by the Regional Technology Innovation Program of the Ministry of Knowledge Economy (MKE) of Korea
文摘Factors for determining the spindle size are the shaft diameter,positions of bearing and motor,and entire length of the spindle.Then,it is important to find the assembling of the optimal design variables,which satisfy the stiffness and rotational speed required to the spindle.A general full factorial design method was used to verify some factors that affect the natural frequency of a spindle.It is verified that the shorter shaft length and bearing span length represent the higher natural frequency,and there are some effects according to the change in the levels of factors.The detailed spindle dimension is determined by applying an EVD method,which can define the optimal bearing position through considering the limiting condition.Based on the estimated regression model,the optimal spindle size and bearing distance that can improve the primary natural frequency are obtained,and the influence of design factors on the natural frequency is also analyzed.
文摘目的探讨低功率极高频电磁波(extremely high frequency wave,EHFW)辐照对肿瘤化放疗患者免疫细胞表达的影响。方法62例恶性肿瘤化放疗患者按自愿和随机原则分为化放疗后极高频电磁复合波幅照组(联合治疗组)及单纯化放疗后观察组(单纯化放疗组)。联合治疗组患者于化放疗后配合以功率密度为10 mW/cm2的EHF波辐照。采用流式细胞术配比性(Matched-pair)检测患者EHF波辐照治疗前-后外周血免疫学指标。结果单纯化放疗组患者在化放疗后第8天,除CD3+、CD4+、CD8+T细胞表达率和CD4+/CD8+比值与化放疗后第3天水平相当外,其NK细胞、NKT细胞、B细胞表达率均明显低于化放疗后第3天水平(P<0.01);而EHF波辐照治疗5 d后,NK细胞表达水平显著高于化放疗后第3天(P<0.05);NKT细胞、B细胞、CD3+、CD4+、CD8+T细胞表达率和CD4+/CD8+比值均略高于化放疗后第3天水平,其前-后变化水平均未见统计学意义(P>0.05)。结论低功率EHF波配合化放疗治疗恶性肿瘤,可稳定和提高免疫细胞表达水平,对患者细胞免疫机能具有保护作用。
文摘提出一种新的锁频环(FLL)鉴别器设计思路.在回波信号多普勒变化率较小的前提下,将正交解调后的差信号视为线性调频(LFM)信号,同时提取其起始频率和频率变化率作为FLL误差控制量,增强了FLL容忍高动态信号的能力.FFT鉴别算法和点积叉积鉴频算法在频率跟踪的不同阶段相互配合构成鉴别器,既获得了宽的鉴别范围又获得了高的鉴别精度.针对极低信噪比情况下偶发鉴别野值的问题,提出了行之有效且实现简单的野值识别与剔除算法.仿真结果表明上述思路可行,采用该鉴别器的FLL在信噪比低至-40 dB时能够容忍较高动态变化,且频率跟踪精度达0.2 Hz.
