A new GPS deformation monitoring algorithm applied to Donghai Bridge

A real-time, long-round global positioning system (GPS) bridge-deformation monitoring technology was proposed, which processes the carrier phase of multiple GPS receivers in an operation center. It was demon- strated an extended Kalman filter with triple differential ionospheric-free measurement (EKF-TIF) which can eliminate the ionospheric delay, whiten the TIF noise and optimize the results of EKF, consequently, achieves a better performance than existing real time kinematic (RTK) solution. An experiment, which takes an active ionosphere condition into consideration, proves the feasibility of this system by comparing its records to that of a traditional RTK solution, practically, the system installed on the Donghai Bridge has survived a non-break running for five months. The analysis to the monitoring records shows the system achieves the designed accu- racy and reliability.     

浅析淘宝网店在蔬菜零售行业中的应用

本文尝试将淘宝网店应用于蔬菜零售行业,希望通过淘宝蔬菜网店这种电子商务模式减少蔬菜流通环节,减低蔬菜交易成本。本文从已有淘宝蔬菜网店的卖家和买家,淘宝网店的蔬菜价格、品种和品质等方面,分析了淘宝蔬菜网店的零售环节和经营上的优势和劣势,并且给出了相关的建议和对策。