离网

• The increase of voice service income of mobile communication companies is declining year by year . to maximize the income & profits of the companies , to prevent the arpu from declining and the customers from giving up , the companies must develop value - added services such as mobile data at high speed
  移动通信运营商的话音收入增长速度正逐年下降，为了确保运营商收入及利润最大化，防止arpu进一步下滑及用户的离网，运营商必须大力发展移动数据等增值业务。
• In order to overcome this problem , i bring forward the task that named “ intelligent patrol system among storage batteris of stand - alone pv power station based on dsp ” . this system can combine with the working stand - alone pv power station perfectly , and can patrol every storage battery of the storage battery group that used in pv station . if the voltge , current and temperature of one battery is not in good state , the system will give alarm in time . if one battery will be bad soon , the system will give alarm too
  为了克服充放电控制器对单个蓄电池不能检测的缺点,特提出研究开发基于dsp的离网太阳能电站蓄电池智能巡检系统。该系统可与当前离网太阳能电站完美结合,完成对蓄电池组中每一块电池的循环检测,如果单个蓄电池充电电压、温度、充电电流出现异常,及时报警,以使蓄电池处于更好的工作状态,提高蓄电池使用寿命。
• Electric power generating from solar is one effective approach of using solar energy , and it grows quickly in world now . the stand - alone pv power station is mainly used in area thar is far from common electricity net and has no electricity power , for example , the remote village 、 the pasturing area and so on
  太阳能光伏发电是利用太阳能的有效途径,目前在国际上发展很快,未与公共电网相连接的太阳能发电站成为离网太阳能发电站,离网型太阳能电站需要用大量蓄电池作为储能设备,白天接受太阳光的照射,将光能转化为电能并存储于蓄电池中,晚上蓄电池放出电能供用户使用。
• The prediction of customer churn in telecommunication is a bit hot . the analysis of the prediction of customer churn is to analyse the losed customer ’ s history data to find out their characters for leaving which help the telecommunication compay to early adopt measure , then reduce customer churning . it has important meaning for the telecommunication compay
  客户流失分析是通过对以往流失客户的历史数据进行分析,找出可能离网用户的特征,及时采取相应的措施,减少客户流失的发生。这对企业降低运营成本,提高经营业绩有着极为重要的意义。
• In order to combat the high cost of churn , the thesis gives a feasible solution : first , build a prediction model for customer ' s churn employing data mining technology ; then , use the model to analyze why customers churn and which customers are most likely to churn in the future ; finally , make better target recruitment campaigns by summarizing customer ' s calling behavior and hobby to increase retention
  为减少或避免客户的流失，本文给出了一种行之有效的解决方案：利用数据挖掘知识建立客户流失预测模型，用此模型挖掘出将要离网的客户，再根据这些客户的通话特征和业务喜好采取针对性的措施加以挽留。
• A modified k - means method which can reduce compute complexity greatly is proposed to cluster similar customers . churn prediction adopts decision trees algorithms . after presenting a brief overview of tree - building algorithm and tree - pruning algorithm of traditional decision trees , the paper describes how to push constraints into the tree - building phase and tree - pruning phase in detail
  离网预测采用了决策树分类器，本文在描述决策树算法中所涉及到的建树、代价计算、剪枝等问题之后，给出了在建树中和建树后分别加入限制条件的修剪算法。
• The stand - alone pv power station needs many accumulators as power storage equipment . they are in series with each other usually , for some reason , they have no same life - span . the result is one of them will be bad firstly . when one of them be bad and not be insteaded in time , the result is others will soon be bad too , even more a fire will take place . so we need check the voltage , current and temperature of every accumulator in time , we must give an alarm when one of the accumulators will be bad
  如果不及时维护和更换,会造成其他蓄电池的损坏加快,在更严重的情况下,会造成停电、火灾等事故,所以应及时地检测每一块蓄电池的工作状况,对温度、充电电压、电流异常或容量截止蓄电池及时报警。目前国内离网太阳能电站中,由充放电控制器完成对串联后的蓄电池组的电压、电流和环境温度的检测和报警。