AIM:To compare noncycloplegic and cycloplegic results of Retinomax measurements with findings achieved after cycloplegia using table-top autorefractor and retinoscopy.METHODS:The study included 127 patients(mean age96...AIM:To compare noncycloplegic and cycloplegic results of Retinomax measurements with findings achieved after cycloplegia using table-top autorefractor and retinoscopy.METHODS:The study included 127 patients(mean age96.7mo,range 21 to 221).Retinomax(Rmax)(Nikon Inc.,Japan)was used to obtain noncycloplegic refraction.Under cycloplegia,refraction was measured with Rmax,table-top autorefractor(TTR)(Nikon NRK 8000,Inc.,Japan)and retinoscopy.The values of sphere,spherical equivalent,cylinder and axis of cylinder were recorded for Rmax,TTR and retinoscopy in each eye.All results were analyzed statistically.RESULTS:The mean spheric values(SV),spherical equivalent values(SEV)and cylindrical values(CV)of the noncycloplegic Rmax(SV:0.64 D,SEV:0.65 D and CV:0.03 D,respectively)were found to be significantly lower than cycloplegic TTR(1.43 D,1.38 D and 0.3 D;P=0.012,P=0.011 and P=0.04,respectively)and retinoscopy(1.34 D,1.45 D and 0.23 D;P=0.04,P=0.002 and P=0.045,respectively).Mean cycloplegic SV,SEV,CV were not significantly different between Rmax and TTR,Rmax and retinoscopy,TTR and retinoscopy.Cycloplegic or noncycloplegic axis values were not different between any method.CONCLUSION:Rmax may be used successfully as a screening tool but may not be accurate enough for actual spectacle prescription.Cycloplegic Rmax measurements may be able to identify refractive error in children because of approximate results to retinoscopy.展开更多
The characteristics of one kind of handset antenna are analyzed by the method of moments. By using the Pocklington equation and the Galerkin method, the current distribution on the handset antenna is calculated, the i...The characteristics of one kind of handset antenna are analyzed by the method of moments. By using the Pocklington equation and the Galerkin method, the current distribution on the handset antenna is calculated, the input impedance and radiation patterns are obtained. In addition, the characteristics of monopoles mounted on conducting chassis box with different sizes are analyzed. The results show that the size of the conducting chassis box has significant effect on the performance of the handset antenna. Therefore, appropriately changing the size of the conducting chassis box may improve the performance of the handset antenna.展开更多
目的通过使用手持式测力计与等速肌力测试两种方式,来测定羽毛球运动员肩关节旋转肌力,观察手持式测力计测试结果与等速肌力测试结果的相关度,探索手持式测力计在运动员肌力评定中的应用。方法以13名女子羽毛球专业运动员为受试者,分别...目的通过使用手持式测力计与等速肌力测试两种方式,来测定羽毛球运动员肩关节旋转肌力,观察手持式测力计测试结果与等速肌力测试结果的相关度,探索手持式测力计在运动员肌力评定中的应用。方法以13名女子羽毛球专业运动员为受试者,分别采用手持式测力计(micro FET 2)与等速测试系统(Iso Med 2000)来测定肩关节旋转肌力,进行统计分析。结果 (1)羽毛球运动员优势侧肩关节旋内肌力测试,手持式测力计与等速快速方式的相关度为r=0.580(P<0.05);非优势侧肩关节旋内肌力测试,手持式测力计与等速快速方式的相关度为r=0.883(P<0.01)。(2)手持式测力计与等速慢速方式下的测试结果相关度无显著性意义。结论 (1)手持式测力计与等速快速肌力测试方式,在羽毛球运动员肩关节旋内肌力的测试结果中具有良好的相关性。(2)手持式测力计的操作简便易行,值得在运动员肩部运动损伤的预防和康复工作中推广使用。展开更多
文摘AIM:To compare noncycloplegic and cycloplegic results of Retinomax measurements with findings achieved after cycloplegia using table-top autorefractor and retinoscopy.METHODS:The study included 127 patients(mean age96.7mo,range 21 to 221).Retinomax(Rmax)(Nikon Inc.,Japan)was used to obtain noncycloplegic refraction.Under cycloplegia,refraction was measured with Rmax,table-top autorefractor(TTR)(Nikon NRK 8000,Inc.,Japan)and retinoscopy.The values of sphere,spherical equivalent,cylinder and axis of cylinder were recorded for Rmax,TTR and retinoscopy in each eye.All results were analyzed statistically.RESULTS:The mean spheric values(SV),spherical equivalent values(SEV)and cylindrical values(CV)of the noncycloplegic Rmax(SV:0.64 D,SEV:0.65 D and CV:0.03 D,respectively)were found to be significantly lower than cycloplegic TTR(1.43 D,1.38 D and 0.3 D;P=0.012,P=0.011 and P=0.04,respectively)and retinoscopy(1.34 D,1.45 D and 0.23 D;P=0.04,P=0.002 and P=0.045,respectively).Mean cycloplegic SV,SEV,CV were not significantly different between Rmax and TTR,Rmax and retinoscopy,TTR and retinoscopy.Cycloplegic or noncycloplegic axis values were not different between any method.CONCLUSION:Rmax may be used successfully as a screening tool but may not be accurate enough for actual spectacle prescription.Cycloplegic Rmax measurements may be able to identify refractive error in children because of approximate results to retinoscopy.
文摘The characteristics of one kind of handset antenna are analyzed by the method of moments. By using the Pocklington equation and the Galerkin method, the current distribution on the handset antenna is calculated, the input impedance and radiation patterns are obtained. In addition, the characteristics of monopoles mounted on conducting chassis box with different sizes are analyzed. The results show that the size of the conducting chassis box has significant effect on the performance of the handset antenna. Therefore, appropriately changing the size of the conducting chassis box may improve the performance of the handset antenna.
文摘目的通过使用手持式测力计与等速肌力测试两种方式,来测定羽毛球运动员肩关节旋转肌力,观察手持式测力计测试结果与等速肌力测试结果的相关度,探索手持式测力计在运动员肌力评定中的应用。方法以13名女子羽毛球专业运动员为受试者,分别采用手持式测力计(micro FET 2)与等速测试系统(Iso Med 2000)来测定肩关节旋转肌力,进行统计分析。结果 (1)羽毛球运动员优势侧肩关节旋内肌力测试,手持式测力计与等速快速方式的相关度为r=0.580(P<0.05);非优势侧肩关节旋内肌力测试,手持式测力计与等速快速方式的相关度为r=0.883(P<0.01)。(2)手持式测力计与等速慢速方式下的测试结果相关度无显著性意义。结论 (1)手持式测力计与等速快速肌力测试方式,在羽毛球运动员肩关节旋内肌力的测试结果中具有良好的相关性。(2)手持式测力计的操作简便易行,值得在运动员肩部运动损伤的预防和康复工作中推广使用。
