杭长高铁多处地段位于路基和桥梁结合处,为无砟地段,因异常变形影响,需布设监测断面开展沉降变形监测工作。沉降监测需要同步对各地段开展一期CPIII控制网进行监测,各处重点地段根据异常变形位置,各向两侧延长200 m左右布设断面监测点,...杭长高铁多处地段位于路基和桥梁结合处,为无砟地段,因异常变形影响,需布设监测断面开展沉降变形监测工作。沉降监测需要同步对各地段开展一期CPIII控制网进行监测,各处重点地段根据异常变形位置,各向两侧延长200 m左右布设断面监测点,布设之后需要对各监测点的周期性沉降变形监测数据进行采集并处理。监测数据周期为一个月左右,产生的数据量比较大。本文根据实际生产需要,在Visual Studio 2010中采用C#编程语言,通过引用Office的Interop组件技术,将txt文本导入Excel中,并且在Excel中生成线状图,大大提高了生产作业的效率,减少了人工操作的工作量,具有较强的实用性。展开更多
A non-linear regression model is proposed to forecast the aggregated passenger volume of Beijing-Shanghai high-speed railway(HSR) line in China. Train services and temporal features of passenger volume are studied to ...A non-linear regression model is proposed to forecast the aggregated passenger volume of Beijing-Shanghai high-speed railway(HSR) line in China. Train services and temporal features of passenger volume are studied to have a prior knowledge about this high-speed railway line. Then, based on a theoretical curve that depicts the relationship among passenger demand, transportation capacity and passenger volume, a non-linear regression model is established with consideration of the effect of capacity constraint. Through experiments, it is found that the proposed model can perform better in both forecasting accuracy and stability compared with linear regression models and back-propagation neural networks. In addition to the forecasting ability, with a definite formation, the proposed model can be further used to forecast the effects of train planning policies.展开更多
Based on the analysis of the impact of Doppler shift to the railway dedicated mobile communication quality under the condition of high-speed mobility,this paper presents a Doppler shift measurement approach based on t...Based on the analysis of the impact of Doppler shift to the railway dedicated mobile communication quality under the condition of high-speed mobility,this paper presents a Doppler shift measurement approach based on the phase estimation of frequency correction channel(FCCH) which correctly reflects the time-varying characteristic of the channel with a testing system developed.The Doppler shift data under the high-speed condition is collected,processed,analyzed,and compared with the simulation results.The scientific laws of the Doppler shift distribution of radio channel under high-speed condition are obtained.These data and analysis are essential for the establishment of high-speed railway Doppler power spectrum model and the development of the key technology of antiDoppler shift.展开更多
文摘杭长高铁多处地段位于路基和桥梁结合处,为无砟地段,因异常变形影响,需布设监测断面开展沉降变形监测工作。沉降监测需要同步对各地段开展一期CPIII控制网进行监测,各处重点地段根据异常变形位置,各向两侧延长200 m左右布设断面监测点,布设之后需要对各监测点的周期性沉降变形监测数据进行采集并处理。监测数据周期为一个月左右,产生的数据量比较大。本文根据实际生产需要,在Visual Studio 2010中采用C#编程语言,通过引用Office的Interop组件技术,将txt文本导入Excel中,并且在Excel中生成线状图,大大提高了生产作业的效率,减少了人工操作的工作量,具有较强的实用性。
基金Project(2014YJS080) supported by the Fundamental Research Funds for the Central Universities of China
文摘A non-linear regression model is proposed to forecast the aggregated passenger volume of Beijing-Shanghai high-speed railway(HSR) line in China. Train services and temporal features of passenger volume are studied to have a prior knowledge about this high-speed railway line. Then, based on a theoretical curve that depicts the relationship among passenger demand, transportation capacity and passenger volume, a non-linear regression model is established with consideration of the effect of capacity constraint. Through experiments, it is found that the proposed model can perform better in both forecasting accuracy and stability compared with linear regression models and back-propagation neural networks. In addition to the forecasting ability, with a definite formation, the proposed model can be further used to forecast the effects of train planning policies.
基金Supported by the National Natural Science Foundation of China(No.U133420261222105)+1 种基金the Key Grant Project of Chinese Ministry of Education(No.313006)the Project of State Key Lab of Rail Traffic Control and Safety(No.RCS 2014ZT11)
文摘Based on the analysis of the impact of Doppler shift to the railway dedicated mobile communication quality under the condition of high-speed mobility,this paper presents a Doppler shift measurement approach based on the phase estimation of frequency correction channel(FCCH) which correctly reflects the time-varying characteristic of the channel with a testing system developed.The Doppler shift data under the high-speed condition is collected,processed,analyzed,and compared with the simulation results.The scientific laws of the Doppler shift distribution of radio channel under high-speed condition are obtained.These data and analysis are essential for the establishment of high-speed railway Doppler power spectrum model and the development of the key technology of antiDoppler shift.
