冰箱销量，2005年首度停止增长

对于中国的冰箱市场来说,2005年相对以前似乎显得有些暗淡。这一年,根据市场研究公司GfK的零售监测数据, 虽然冰箱市场的销售金额比2004年有了4．6％的增长,但销量却比2004年下降了4．2％。这是中国冰箱市场经过连续数年增长后,销量出现的首次下降。     

Study on high rock slop anchoring technique of large rock engineering

Monitoring data from the Three Gorges Project show that the resulted tensile stresses are mainly distributed within the front section of the internal anchoring section which is often measuring 2.5 m in length. The composition of two early strength cement grout mixes marked as R3350 and R7350 was successfully developed to accelerate anchoring facilities installation and to reduce its intervention with the shiplock construction. It was measured that the ground water pH value in the sidewall slopes of the permanent navigation shiplock during the construction period was close to 8. Based on those characteristics it is concluded that the groundwater is weakly corrosive to steel material and will appear as non-corrosive to the steel wire strands embedded in the cement grout set. The advanced model of 3 MN unbonded anchor cables with double anti-corrosion protection （including the corrugated pipe） is developed to meet the needs of stabilizing the high sidewall rock slopes of the permanent navigation shiplock on the Three Gorges Project.     

高速列车振动监测数据的广义维数特征提取

为监测高速列车的运行状态,采用多重分形分析列车振动监测数据,提取一种基于多重分形理论的广义维数谱参数(谱最大值Dmax、谱最大值与最小值之差△D和谱均值-D),以3种广义维数谱参数作为特征量,实现对列车正常状态、空气弹簧失效、抗蛇行减振器失效和横向减振器失效状态的表征.实验结果表明,Dmax、△D和-D均能够表征高速列车的运行状态且具有一定稳定性,为高速列车运行状态的识别提供了一种有效的方法.     

基于双MCU和nRF2401的无线传感器网络系统

基于无线传感器网络的理论和实现研究,提出了无线传感器网络系统.该系统由3个传感器节点和1个Sink节点组成.传感器节点采用MSP430F123单片机为处理器;Sink节点采用S3C2410为处理器,两者的无线传输模块均采用nRF2401芯片.经调试运行,该系统实现了小规模地区内温度信号的采集、传输和处理.运行结果表明,该系统可以作为无线传感器网络的实验系统,为无线传感器网络的研究提供实验平台.     

棘洪滩水库浮游藻类状况及对水质的影响

棘洪滩水库是山东省引黄济青工程的调蓄水库,是全国最大的平原围坝型水库,负责向青岛市和周边地区供水。水库围坝长14．2km,总库容1．568亿m~3,日供水能力达30多万立方米。于1989年11月25日正式通水运行,17年来,已向青岛市供水12亿m~3,完全满足了青岛市供水需求。棘洪滩水库管理处常年对水库     

Excel在环境监测数据处理中的应用

针对环境监测数据处理存在数据多、计算复杂繁琐等困难,提出利用Excel的基本功能,建立电子工作表,处理环境监测数据。以生化需氧量数据处理为例,说明Excel电子工作表建立的过程。     

特殊情况下多点位移计监测数据处理方法探讨

在由于施工或地质缺陷等原因引起最深测点发生移动的情况下,为了得到客观真实的监测数据,对不同的多点位移计监测数据处理方法进行研究。采用了根据监测数据找出相对稳定的测点作为不动点,再以不动点为基准,计算各测点相对于不动点的位移量的方法,并将其计算结果与其他数据处理方法计算结果进行对比。结果表明,该方法能较准确地反映被监测物体(边坡、大坝等)的位移情况。同时提出了相对稳定点的确定方法,以供工程实际应用参考。     

Gas drainage efficiency improvement by increasing coalbed permeability using waterjet cutting system

This paper presented a method to create artificial fractures along the existing gas drainage borehole and increase the permeability of the coalbed using a high pressure waterjet cutting system. The field work conducted in Rujigou Colliery, Shenhua Ningxia Coal Group demonstrate that the coalbed permeability is increased, and accordingly, gas drainage efficiency is improved up to 3 to 6 times over the traditional methods using high pressure waterjet technique. Also, based on the monitoring data, the conceptual model for gas drainage process associated with different mining activities has been proposed, and few major advantages using waterjet assistance method have been identified.     

小家电更新升级促增长 废旧小家电渴望被回收

奥维咨询(AVC)线上监测数据显示:小家电线上占比远高于大家电,占比超30%,其中原汁机、电饭煲、电烤箱这三类小家电2014年上半年线上销售增速均超过100%。