建筑室内空间LED照明过量的蓝光辐射会对视网膜造成损伤。建筑室内照明的辐射与环境反射光谱分布有关。为了得出建筑室内空间环境反射光谱的蓝光辐射强度,在7种不同照度下测量和计算了5 000 K LED光源的直射光谱和环境反射光谱。结果表...建筑室内空间LED照明过量的蓝光辐射会对视网膜造成损伤。建筑室内照明的辐射与环境反射光谱分布有关。为了得出建筑室内空间环境反射光谱的蓝光辐射强度,在7种不同照度下测量和计算了5 000 K LED光源的直射光谱和环境反射光谱。结果表明LED照明在建筑室内空间实际应用中,环境反射光谱的辐射强度只有光源直接辐射强度的20%,眼睛实际接收到的辐射强度远远低于蓝光辐射安全限值,不会造成视网膜损伤。对于主要发出蓝光的光源长时间高强度照明对视网膜仍可能存在潜在危害。展开更多
The sale of nine kinds of US construction equipments reached to 21.12 billion dollars in 2005 which increased by 28.3% compared with the record of the previous year. The value of these nine kinds of equipments grew in...The sale of nine kinds of US construction equipments reached to 21.12 billion dollars in 2005 which increased by 28.3% compared with the record of the previous year. The value of these nine kinds of equipments grew in different degree in 2005. The highest sale records appear in these productions. The sale of tractor shovel loaders was 6.434 billion dollars, increased by 35.1%.Power cranes, draglines, and excavators, including surface mining equipments, and attachments sold 3.652 billion dollars, increased by 28.0%. This article will give you the analysis of comparison of nine kinds of us equipments sale value from 2001 to 2005, sale of earthmoving equipment from 2004 to 2005, import and export situation in 2005.展开更多
AEM has released the forecast of world construction machinery market for the end of 2005 and 2006. This forecast contains 168 equipments and 18 components, and is divided into 7 series of products: earth-moving equipm...AEM has released the forecast of world construction machinery market for the end of 2005 and 2006. This forecast contains 168 equipments and 18 components, and is divided into 7 series of products: earth-moving equipments; lifting equipments; asphalt equipments; concrete and aggregate equipments; mini equipments; components; other equipments.The forecast estimates that world construction machinery market 2005 will increase by 8.4% compared to 2004. and USA will increase by 13.9%, Canada will increase by 13.0%. World construction machinery market 2006 will increase by 9.0% compared to 2005. and USA will increase by 9.3%, Canada will increase by 8.0%.展开更多
For 2004, value of 13 types of construction machinery in America, except scraper bowls increased by 23.9 percent from $13,089.5 million in 2003 to $ 16.217.6 million in 2004. You can see the changes of 13 types among ...For 2004, value of 13 types of construction machinery in America, except scraper bowls increased by 23.9 percent from $13,089.5 million in 2003 to $ 16.217.6 million in 2004. You can see the changes of 13 types among five years in the table. The detailed sales number and sums of every type are statistical. Almost all of the related type have increased except the rough terrain forklifts which decreased by 18.1percent to $312.3 million in 2004. And you can sec the situation of import and export of partial types in America. Only the export of wheeled loaders has exceeded the import thereinto.展开更多
文摘建筑室内空间LED照明过量的蓝光辐射会对视网膜造成损伤。建筑室内照明的辐射与环境反射光谱分布有关。为了得出建筑室内空间环境反射光谱的蓝光辐射强度,在7种不同照度下测量和计算了5 000 K LED光源的直射光谱和环境反射光谱。结果表明LED照明在建筑室内空间实际应用中,环境反射光谱的辐射强度只有光源直接辐射强度的20%,眼睛实际接收到的辐射强度远远低于蓝光辐射安全限值,不会造成视网膜损伤。对于主要发出蓝光的光源长时间高强度照明对视网膜仍可能存在潜在危害。
文摘The sale of nine kinds of US construction equipments reached to 21.12 billion dollars in 2005 which increased by 28.3% compared with the record of the previous year. The value of these nine kinds of equipments grew in different degree in 2005. The highest sale records appear in these productions. The sale of tractor shovel loaders was 6.434 billion dollars, increased by 35.1%.Power cranes, draglines, and excavators, including surface mining equipments, and attachments sold 3.652 billion dollars, increased by 28.0%. This article will give you the analysis of comparison of nine kinds of us equipments sale value from 2001 to 2005, sale of earthmoving equipment from 2004 to 2005, import and export situation in 2005.
文摘AEM has released the forecast of world construction machinery market for the end of 2005 and 2006. This forecast contains 168 equipments and 18 components, and is divided into 7 series of products: earth-moving equipments; lifting equipments; asphalt equipments; concrete and aggregate equipments; mini equipments; components; other equipments.The forecast estimates that world construction machinery market 2005 will increase by 8.4% compared to 2004. and USA will increase by 13.9%, Canada will increase by 13.0%. World construction machinery market 2006 will increase by 9.0% compared to 2005. and USA will increase by 9.3%, Canada will increase by 8.0%.
文摘For 2004, value of 13 types of construction machinery in America, except scraper bowls increased by 23.9 percent from $13,089.5 million in 2003 to $ 16.217.6 million in 2004. You can see the changes of 13 types among five years in the table. The detailed sales number and sums of every type are statistical. Almost all of the related type have increased except the rough terrain forklifts which decreased by 18.1percent to $312.3 million in 2004. And you can sec the situation of import and export of partial types in America. Only the export of wheeled loaders has exceeded the import thereinto.
