We propose a simple iterative algorithm based on a temporally movable phase modulation process to retrieve the weak temporal phase of laser pulses. This unambiguous method can be used to achieve a high accuracy and to...We propose a simple iterative algorithm based on a temporally movable phase modulation process to retrieve the weak temporal phase of laser pulses. This unambiguous method can be used to achieve a high accuracy and to simultaneously measure the weak temporal phase and temporal profile of pulses, which are almost transform- limited. A detailed analysis shows that this iterative method has valuable potential applications in the charac- terization of pulses with weak temporal phase.展开更多
The thermal lens effect has emerged in recent years as a novel ,highly sensitive tool for the study of the very weak molecular absorption of light energy,This paper discusses the theory and technique of the thermal le...The thermal lens effect has emerged in recent years as a novel ,highly sensitive tool for the study of the very weak molecular absorption of light energy,This paper discusses the theory and technique of the thermal lens measurement.Some opplications of the thermal lens measurement are described.A mode-mismatched dual-beam thermal lens experimental arragement with a modulated probe beam ,designed by the authors.for trace analysis is presented,and its detection limit was found to be 4.1×10^-7 for Cu(Ⅱ) in ethanol and 80 mW excitation power.展开更多
目的评估弱激光血管外照射降低血压、血脂和血糖的疗效。方法采用问卷调查方法,采集全国腕带式弱激光仪使用者的治疗信息,分析用户治疗前后的血压、血脂和血糖变化情况,采用单因素与多重线性回归方法分析弱激光照射降压的影响因素。结...目的评估弱激光血管外照射降低血压、血脂和血糖的疗效。方法采用问卷调查方法,采集全国腕带式弱激光仪使用者的治疗信息,分析用户治疗前后的血压、血脂和血糖变化情况,采用单因素与多重线性回归方法分析弱激光照射降压的影响因素。结果共回收问卷5801份,因缺失值较多,仅将有治疗前后对比数据的调查对象纳入分析,其中,高血压1335例,高血糖180例,血脂异常129例。治疗后仪器使用者的收缩压(SBP)(t=53.16,P<0.001)、舒张压(DBP)(t=34.17,P<0.001)、三酰甘油(TG)(t=7.87,P<0.001)、总胆固醇(TC)(t=8.78,P<0.001)和空腹血糖(FBG)水平(t=11.64,P<0.001)均较使用前明显下降。与基线水平相比,治疗后仪器使用者的SBP、DBP、TG、TC和FBG分别下降了23.3 mm Hg(14.50%)(1 mm Hg=0.133 k Pa)、10.6 mm Hg(11.40%)、0.86 mmol/L(28.70%)、1.11 mmol/L(18.00%)和3.64 mmol/L(34.40%)。不失眠者的DBP下降幅度明显高于失眠者(F=9.54,P=0.00),不饮酒者的DBP下降幅度明显高于饮酒者(F=5.08,P=0.02);男性TG下降幅度明显高于女性(Z=-2.48,P=0.01),有精神压力者的TG下降幅度显著高于无精神压力者(Z=-2.16,P=0.03),吸烟者TG下降幅度明显高于无吸烟用户(Z=-2.17,P=0.03)。所有使用者的中位使用时间为616 d(1~5479 d),以四分位数分为<272 d、272~698 d、699~1435 d和1437 d 4组,其SBP下降幅度分别为(-22.25±16.22)、(-21.59±15.24)、(-24.96±16.82)和(-24.66±15.88)mm Hg,差异有统计学意义(F=3.55,P=0.01)。多元线性回归分析结果显示,性别(β=-0.08,P=0.0178)和仪器使用时间(β=-0.09,P=0.0016)是SBP变化的影响因素;性别(β=-0.10,P=0.0039)、失眠(β=0.09,P=0.0015)和饮酒(β=0.10,P=0.0033)是DBP变化的影响因素。结论长时间弱激光血管外照射有降压、降脂和降糖效果。展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 61205103
文摘We propose a simple iterative algorithm based on a temporally movable phase modulation process to retrieve the weak temporal phase of laser pulses. This unambiguous method can be used to achieve a high accuracy and to simultaneously measure the weak temporal phase and temporal profile of pulses, which are almost transform- limited. A detailed analysis shows that this iterative method has valuable potential applications in the charac- terization of pulses with weak temporal phase.
文摘The thermal lens effect has emerged in recent years as a novel ,highly sensitive tool for the study of the very weak molecular absorption of light energy,This paper discusses the theory and technique of the thermal lens measurement.Some opplications of the thermal lens measurement are described.A mode-mismatched dual-beam thermal lens experimental arragement with a modulated probe beam ,designed by the authors.for trace analysis is presented,and its detection limit was found to be 4.1×10^-7 for Cu(Ⅱ) in ethanol and 80 mW excitation power.
文摘目的评估弱激光血管外照射降低血压、血脂和血糖的疗效。方法采用问卷调查方法,采集全国腕带式弱激光仪使用者的治疗信息,分析用户治疗前后的血压、血脂和血糖变化情况,采用单因素与多重线性回归方法分析弱激光照射降压的影响因素。结果共回收问卷5801份,因缺失值较多,仅将有治疗前后对比数据的调查对象纳入分析,其中,高血压1335例,高血糖180例,血脂异常129例。治疗后仪器使用者的收缩压(SBP)(t=53.16,P<0.001)、舒张压(DBP)(t=34.17,P<0.001)、三酰甘油(TG)(t=7.87,P<0.001)、总胆固醇(TC)(t=8.78,P<0.001)和空腹血糖(FBG)水平(t=11.64,P<0.001)均较使用前明显下降。与基线水平相比,治疗后仪器使用者的SBP、DBP、TG、TC和FBG分别下降了23.3 mm Hg(14.50%)(1 mm Hg=0.133 k Pa)、10.6 mm Hg(11.40%)、0.86 mmol/L(28.70%)、1.11 mmol/L(18.00%)和3.64 mmol/L(34.40%)。不失眠者的DBP下降幅度明显高于失眠者(F=9.54,P=0.00),不饮酒者的DBP下降幅度明显高于饮酒者(F=5.08,P=0.02);男性TG下降幅度明显高于女性(Z=-2.48,P=0.01),有精神压力者的TG下降幅度显著高于无精神压力者(Z=-2.16,P=0.03),吸烟者TG下降幅度明显高于无吸烟用户(Z=-2.17,P=0.03)。所有使用者的中位使用时间为616 d(1~5479 d),以四分位数分为<272 d、272~698 d、699~1435 d和1437 d 4组,其SBP下降幅度分别为(-22.25±16.22)、(-21.59±15.24)、(-24.96±16.82)和(-24.66±15.88)mm Hg,差异有统计学意义(F=3.55,P=0.01)。多元线性回归分析结果显示,性别(β=-0.08,P=0.0178)和仪器使用时间(β=-0.09,P=0.0016)是SBP变化的影响因素;性别(β=-0.10,P=0.0039)、失眠(β=0.09,P=0.0015)和饮酒(β=0.10,P=0.0033)是DBP变化的影响因素。结论长时间弱激光血管外照射有降压、降脂和降糖效果。
