One hundred and twenty normal subjects (240 eyes) agedfrom 10 to 69 were tested with FM 100-hue test.They were divided into6 groups according to their age.It was shown that there were no statisti-cally significant dif...One hundred and twenty normal subjects (240 eyes) agedfrom 10 to 69 were tested with FM 100-hue test.They were divided into6 groups according to their age.It was shown that there were no statisti-cally significant difference in the total error score (TES) between the malesand females or between the right and left eyes,but there existed some rela-tionships between the TES and age.The total error score (TES) was thelowest in the 20-29 age group and increased gradually with aging.Theanalysis of the partial...展开更多
简述准东—皖南±1 100 k V特高压直流输电示范工程在世界上具有输送容最大、电压等级最高、输送距离最远等优点,分析±1 100 k V直流工程系统试验需要研究内容以及需要完成的工作。借鉴±800 k V直流工程系统研究和现场系...简述准东—皖南±1 100 k V特高压直流输电示范工程在世界上具有输送容最大、电压等级最高、输送距离最远等优点,分析±1 100 k V直流工程系统试验需要研究内容以及需要完成的工作。借鉴±800 k V直流工程系统研究和现场系统试验的经验,结合±1 100 k V特高压直流输电工程的特点,对±1 100 k V特高压直流系统进行仿真计算分析研究,内容包括:±1 100 V特高压直流接入系统分析、系统稳定计算分析、过电压计算分析和直流控制保护计算分析。根据上述系统计算分析结果,提出系统安全稳定控制策略、过电压控制策略和直流系统控制保护策略。结合±1 100 k V直流工程受端高低端换流器分层接入系统的特点,提出±1 100 k V特高压直流输电工程系统试验方案。展开更多
文摘One hundred and twenty normal subjects (240 eyes) agedfrom 10 to 69 were tested with FM 100-hue test.They were divided into6 groups according to their age.It was shown that there were no statisti-cally significant difference in the total error score (TES) between the malesand females or between the right and left eyes,but there existed some rela-tionships between the TES and age.The total error score (TES) was thelowest in the 20-29 age group and increased gradually with aging.Theanalysis of the partial...
文摘简述准东—皖南±1 100 k V特高压直流输电示范工程在世界上具有输送容最大、电压等级最高、输送距离最远等优点,分析±1 100 k V直流工程系统试验需要研究内容以及需要完成的工作。借鉴±800 k V直流工程系统研究和现场系统试验的经验,结合±1 100 k V特高压直流输电工程的特点,对±1 100 k V特高压直流系统进行仿真计算分析研究,内容包括:±1 100 V特高压直流接入系统分析、系统稳定计算分析、过电压计算分析和直流控制保护计算分析。根据上述系统计算分析结果,提出系统安全稳定控制策略、过电压控制策略和直流系统控制保护策略。结合±1 100 k V直流工程受端高低端换流器分层接入系统的特点,提出±1 100 k V特高压直流输电工程系统试验方案。