高平市开化寺旅游景区客源市场分析与定位研究

以高平市旅游总体规划的客源市场定位为指导,以晋城市和高平市旅游风景区近年来的客源市场统计资料及数据为依据,结合对旅游客源市场的抽样调查,运用数理统计方法,通过分析旅游者多方面结构与特征,以及开化寺旅游景区未来旅游市场的机遇和条件,确立景区旅游市场开发定位,预测近年来的旅游市场增长态势.     

球磨仪制样-微波消解-GFAAS法测定土壤中铅

建立了行星式球磨仪制样一微波消解一石墨炉原子吸收光谱法测定土壤中铅的方法。标准曲线在0—10．01μg／L范围内线性良好,以称样0．5g、定容体积50ml计,方法检出限为0．10mg／kg,土壤样品测定的RSD〈4％,加标回收率为91．4％～102％。     

风筒位置对掘进巷道流场影响的PIV实验*

为探究风筒位置对掘进巷道风流分布规律的影响,利用Fluent软件确定出实验模型内流体进入“第二自模区”的临界风速,保证实验模型与实际巷道的流动相似,采用粒子图像测速仪（PIV）对压、抽风筒距迎头不同距离下的前压后抽式通风流场进行测量。实验结果表明:抽风筒距巷道迎头距离的改变对迎头处流场影响较小,涡流中心位置也不会发生改变,当抽风筒距迎头距离大于4.5S,回流区的风流充分发展,流动较为平缓。压风筒距巷道迎头距离的改变对迎头处流场和涡流影响较大,当压风筒距迎头距离大于3S,涡流中心位置向远离迎头的方向移动,涡流区域逐渐扩大。基于相似理论的PIV实验结果可为矿井掘进巷道通风工作提供一定参考。     

Electromyographic analysis of relevant muscle groups during completion of computer tasks using different computer mouse positions

Background. We analyzed muscular activity for different computer mouse positions during the completion of a timed computer task and determined whether the different mouse positions could affect muscular activity, productivity and perceived fatigue. Methods. The subjects were nine healthy young men. Two mouse positions were studied: the distal position (DP), with the forearm rested on the desk; the proximal position (PP), with only the wrist rested on the desk. The subjects performed a 16-min task in each position. Surface electromyography data were recorded for the upper back and shoulder muscles. Work productivity and muscular activity were measured for each mouse position. A visual analog scale was used to assess subjective fatigue. Results. Muscular activity was higher in muscle (m.) deltoideus (posterior) for the DP, while it was significantly higher in m. inferior infraspinatus for the PP. The visual analog scale score was significantly higher and work productivity was lower in the PP. Conclusions. We found that using a mouse in the DP rather than the PP leads to less activity of the external rotators, less perceived fatigue and more productivity. This suggests that the DP is preferable to the PP for computer work involving a mouse.     

处理电镀废水新型设备的研制

活动式小型自动化离子交换再生一体化设备系国家“八五”科技攻关课题研制的新型电镀废水处理设备。其结构为拼装式,交换柱可依工况(交换或再生)由三维驱动器控制,自动完成与固定管道系统离合,从而实现水的连续处理。