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The low voltage ride through capability is an important aspect of the operation safety of the wind farm. According to the situation of the lack of effective monitoring of wind turbine operation, a online tracking quantitative evaluation method of wind turbine low voltage ride through capability (LVRT) is brought forward. This method realizes the monitoring and analysis of the safety of the operation...
To investigate the suitability of miniature pigs as an animal model for otological research.Microdissection of the temporal bone was performed on 10 miniature pigs and recorded on photographs.The morphology and measurement of the external, middle and inner ear and the lateral recess of the miniature pigs were obtained by microdissection.Compared to traditional animal models, the miniature pig may...
How to optimally place the tenant replication data to retain the load-balance and reduce cost of communication and distributed transaction, it is an important issue to achieve the high performance and availability of multi-tenant data, there are plenty of issues need to be solved. This paper proposes the Multi-Objective Genetic Algorithm. It uses a rank-based fitness assignment method for MOGAs to...
This Multi-tenant data for SaaS application is not available when the cluster is failure. The replication can guarantee the security of data by increasing redundancy. It also approaches to increase data availability with suitable replication policy. Now replication is in units of physical table, which doesn't fit to SaaS application in a big sharing wide table. We propose the minimum threshold of...
With the global environmental changing and energy scarcity, human pay attention to the living conditions. Automobiles, consuming energy and emitting harmful substance, become the focus of attention. In order to control the emission of the harmful substance in a certain range, different new regulations were formulated to limit the emission pollutants of automobiles. It was a new facing challenge that...
Increasing power output performance, decreasing fuel consumptions and reducing emission pollutions have become the direction and object of the motor development now. In order to achieve the object, the engineers have taken various measures. Among them, Turbo charging technology was the better improving method. Now several new turbocharger systems are used in gasoline engine-VTG in Porsche car, TSI...
An object tracking algorithm based on SURF is presented in this paper. Interest points are detected by SURF detector in reference region which is located in the first frame manually. In the following sequences, the SURF feature points are extracted in a larger window which is selected as test region. In the matching stage, we calculate the Euclidean distance between the descriptor vectors of interest...
The Electrical Mechanical Brake(EMB) is advanced with plenty functions of ABS, TCS and ESP etc. EMB has very good development prospect for its good reaction speed and reliable performance as well as easy installation maintenance. Studying the method of design and simulation is necessary. First, the structure, working principle and the related parts mathematical model of EMB were introduced; Second,...
On the basis of the analysis of structural characteristics and kinematics characteristics of plane two-DOF dual-truck parallel mechanism including workspace, forward kinematics, inverse kinematics solution, blind area avoiding, singular position and velocity and acceleration of mechanism feature point, the main controller designed by DSP chip and the THB7128-based stepper motor drives are focused...
A novel plant growth simulation algorithm is proposed for fault location of distribution network in this paper. It presents a way to transform the currents of switches and equipments into integer variables, sets up a model for fault location of distribution network. Simulation tests proved the correctness, effectiveness as well as the high fault tolerance of the above plant growth simulation algorithm...
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