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An anti-slip method for locomotives using improved adhesion characteristic curve slope method is proposed to solve the problem of low stability and control precision of the original adhesion characteristic curve slope method, it's adopting differentials of adhesion coefficient and slip speed as the identification criterion for locomotive states. The relationship among locomotive adhesion, resistance,...
In recent years, doublet lens has been used more and more widely in the ideal optical components of confocal 3D imaging due to its high resolution. But for doublet cemented lenses, spherical aberration becomes the biggest barrier to its application. In this paper, based on the formation mechanism of spherical aberration, not only the near and far axis optical path calculation method and equation are...
Imaging objects in electrical impedance tomography (EIT) measurement are often in a dynamic evolution process, and exploiting the spatial-temporal properties for the dynamic reconstruction objects is crucial for the improvement of the reconstruction quality. In this paper, the linearized equation system for dynamic EIT is established based on spatio-temporal representation. Due to the spatial redundancy...
This paper aims to study the issue of robust synchronous control of multi-motor. A scheme of synchronous motion based on the artificial potential field is proposed. In this scheme, a model of artificial potential field is constructed and by employing the methods for the flocking control and the sliding mode variable structure, the synchronous control is designed for the multi-motor system. Moreover,...
Applying evolutionary game theory and method which aim at the supply side group enterprises and the demand side group enterprises in food supply and demand network (FSDN), we build the evolutionary game model of FSDN node enterprises implementing traceability system cooperatively. We also study the cooperation mechanism between the node enterprises of bounded rationality. Results show that the probability...
Diabetes, hypertension, cerebral arteriosclerosis and other diseases have become great threats to human health, so it is urgent to explore their initial symptoms for early prevention and treatment. As an important part of small and medium-sized vessels of human body, retinal vessel is the only deep capillary that can be non-traumatic directly observed and its morphology, such as vascular diameter,...
Electron cryo-microscopy (Cryo-EM) technique produces 3-dimensional (3D) density images of proteins. When resolution of the images is not high enough to resolve the molecular details, it is challenging for image processing methods to enhance the molecular features. β-barrel is a particular structure feature that is formed by multiple β-strands in a barrel shape. There is no existing method to derive...
Traffic system is difficult to be simulated because of the emergence phenomenon. Traditional simulation research has achieved great development, but most of them are based on ideal conditions which assume vehicles have little difference in dimension, maneuverability or other aspect. In China mixed traffic occupies the majority, so big errors might occur when mathematical method is used. Multi-agent...
Considering the control performance requirements of high-performance printing press, a sliding-mode speed controller with torque feed-forward compensation is proposed in this paper. First, a sliding mode control method is presented for the permanent magnet synchronous motor(PMSM) of the printing press. Then, in order to reduces chattering phenomenon caused by system parameter variations and external...
The chattering is inevitable in using Variable Structure Controller (VSC) to control two-wheeled unstable vehicle. Although the traditional methods which are improved the reaching law and the switching surface effectively impair the chattering, they impair the anti-interfering of VSC at same time. To solve this problem, the dynamic pseudo sliding mode control with disturbance compensation term is...
As the increasing of installed capability of wind power in power system, the dynamic wind turbine models are required for wind turbine and wind farm stability assessment. For this reason, the wind turbine models have to be simulated accurately compare to the wind turbine operation behavior especially during grid fault. An accurate DFIG wind turbine dynamic model is presented. For low voltage ride...
This article uses the autoregressive distributed lag - Error Correction Model (ARDL-ECM) to analyze the real estate prices and interest rate data from the fourth quarter of 1998 to the first quarter of 2008 .The results show that the interest rate and the real estate prices , in the long run, are negatively related; in the short term, the impact of interest rates on real estate prices lags 2 periods,...
Employing the Thailand Manufacturing Production Index as the proxy of the economic growth level, the sum of the loans of private sector, market capitalization of SET and Bonds outstanding as the proxy of the financial development level, we studied the relation between the Thailand economic growth level and the financial development level. We found the financial development level has a notable asymmetric...
An efficient service matching process is crucial for solving complex problems based on heterogeneous agents. Agent cooperation can be achieved through matching requesting agents with service-providing agents, and, through such cooperation, multi-agents can solve a variety of complex problems. Improving the efficiency of the agent-matching process has become an important issue in multi-agent research...
In spite of the rising demands for reusable information systems, current designs are still insufficient in providing efficient reusable mechanisms for system design. One of the major problems hindering the development of information reuse in most traditional systems, which include component-based systems and object-oriented systems, is the lack of the self-organising ability among the system components...
A critical aspect of applications in Wireless Sensor Networks (WSNs) is network lifetime. Power-constrained WSNs are usable as long as they can communicate sensed data to a processing node. Poor communication links and hazard environment make the WSNs unreliable. The existing schemes only consider that the state of a sensor covering targets is in binary mode: success (cover the targets) or fail (cannot...
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