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It is a common view that users' browsing behaviors reflect their true interest in commodities at an e-commerce site. With the development of E-commerce, users' detailed navigating and purchasing behaviors can be completely stored. Clickstream data are records of users' browsing behaviors, which provide information about the path viewed by users and their access time on each page. Usually, personalized...
A new nonlinear variable structure guidance law considering missile dynamics of autopilot against the space maneuver target is presented. Considering the target maneuverability as a disturbance with boundary, this guidance law constructs the switching surface by adding a nonlinear function which is confirmed by feedback optimization theory at the linear switching surface based on the proportional...
Carbon nanotubes (CN) exhibit not only experimentally excellent field-emission features, low threshold field, high current density and thermal stability, but also the current-voltage (I-V) characteristic deviates from the Fowler-Nordheim (FN) type behavior at high current density, which induces theoretical interesting to understand new physics in CN field emission. In principle, the energy band structure...
Aiming at enhancing the performance of fuzzy immune PID control algorithm, combines the fuzzy immune PID control with the adaptive PSD control law, advances a fuzzy immune PSD control algorithm, achieves the adaptive tuning of the proportional, differential and integral plus. Simulating experiments shows that adopting the fuzzy immune PSD control can obtain good performance and reduces the workload...
For the momentum wheel control system of satellite, a method to design sliding mode observers for reconstructing actuator fault is presented. It uses the equivalent output injection concept to explicitly reconstruct fault signals, and uses concept to design the sliding motion so that the effect of the uncertainty on the reconstruction of the faults will be minimized. This method can estimate the existing...
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