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The prestress dry grinding which combines with prestress grinding and surface strengthening is an innovative approach to substitute conventional grinding process. The residual stress and the thickness of strengthened layer have an important effect on surface performance of workpiece. In order to analyze the effect mechanisms of prestress on residual stress and thickness of strengthened layer, experiment...
Lateral-load transfer rate is considered and seven freedoms of dynamic model of vehicles are established to simulate vehicle roll stability. This simulation model can be used to analyze vehicle dynamic characteristic and roll stability. The impact factors of roll stability are analyzed with different structure and property parameters in steering wheel angle step input with different speed such as...
With the rapid development of urbanization, traditional urban sensing approaches cannot be sufficient to meet the growing demand of people. To achieve a highly reliable and stable urban sensing network, we propose a micro-level urban sensing schema. Participatory sensing and vehicle sensing are not suitable for this kind of network due to the active participation, the opportunistic or the deployment...
In this paper, a switching type PID controller is proposed in order to eliminate the static error as the voltage of the battery goes low in a real UAV system. In the switching type PID controller, the Integration Control is put in based on the differential of height which means vertical speed. Simulation of conventional PID and switching type PID control is presented. Real-time experiments show that...
In order to reduce the response time and solve the problem of reactive power overcompensation of the magnetically controlled reactor (MCR), a novel compensation algorithm is proposed in this paper. The algorithm is based on the principles and algorithms of unbalanced load compensation and via modifying the compensation conditions of the Steinmetz principle. The general formula of the compensatory...
A new step count application system, called iStep, is developing by Fu Zhou EMAX Company. iStep System needs to transmit step data between the smart phone and EMAX watch with built-in pedometer in the way of low energy and reliability. Bluetooth Low Energy 4.0 (BLE 4.0) can help satisfy these requirements. However, at present there is lack of step application BLE profile. To solve this problem, the...
The Song hua River Highway Bridge is located in the northeast cold areas, which is affected by the freeze-thaw cycles vulnerably. Both of the indoor rapid freeze-thaw experiment and outdoor natural exposure experiment were taken for the main concrete components of the bridge. Through experiment, The freeze-thaw damage law for concrete was mastered. Take the loss ratio of concrete dynamic modulus of...
With the rapid development of wide application of information technology, it is required that high-quality competent composite specialists of a taxation service are competent for the job of taxation, various intermediary organs and finance and accounting for enterprises. Three-dimensional and open-ended practice teaching platform is an important part of taxation teaching and research work and an important...
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