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In recent years, the data mining technology has been developed rapidly. New efficient algorithms are emerging. Association data mining plays an important role in data mining, and the frequent item sets are the highest and the most costly. This paper is based on the association rules data mining technology. The advantages and disadvantages of Apriori algorithm and FP-growth algorithm are deeply analyzed...
With the improvement of hydraulic components and hydraulic technology, hydraulic truck crane application became more extensive and more prominent advantages. The design is carried out under the parameters based on a certain type of crane QY16. The maximum outrigger load and the parameters of implementation components and accessories in the hydraulic system on the basis of the maximum load is calculated...
The deformation monitoring of landslide is an important content of the safety monitoring of landslide, it is one of the important tasks to make timely, reasonable and effective analysis for landslide observation data for getting the deformation regularities and the safety states of landslide, and the safety status and the stability of the landslide can be judged by the analysis results. The advanced...
A 2-DOF dynamics model of vibration isolation in vibratory piling is built up. Based above, the optimization model of parameters of vibration isolation is derived. Then, the parameters of vibration isolation are solved by complex method. Finally, the optimal result is compared with that by experience.
To foster a deep objective evaluation that the import and export trade plays a important role of Heilongjiang Provincial economic growth, this paper are analyzed the status of import and export trade of Heilongjiang Province, where they are introduced based on the International Trade Theory and the Theory of Economic Growth. Finally, policy recommendations are made, based on empirical analysis by...
Freescale MC9S12DG128 16-bit MCU (micro controller unit), as the core control unit, constitutes a intelligent car system with DC motors, steering gear and power source, as well as other circuits, The system has designed hardware and software, and realized the real-time observation for the car through PC. MCU uses PID algorithm to realize real-time control to the angle of steering gear and marching...
The article has analyzed the domestic and international present research status and development trend of the electric and hybrid electric vehicles (HEV). Considering actual scientific research, according to the characteristic and environment requirement of all-terrain vehicle (ATV), the principle of elected and designed component parts for powertrain coupling system of ATV, and the demands of performance...
Channel mismatch, including amplitude and phase mismatch, has severely affected the performance of space-time adaptive processing (STAP). In order to ascertain the specification of the effects on STAP, theory analysis of relation between clutter covariance matrix (CCM) with and without channel mismatch is done based on the model provided by literature, and the effect to signal is also analyzed. In...
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