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In modern power system, reclosing operation of single-phase fault is commonly employed in order to improve operating stability and reliability. However, the successive electrical transients caused by system faults and subsequent switching operations give rise to mechanical stresses nearby electric machines. These stresses may exceed the endurance limit of certain machine parts and bring about slight...
Pumped storage machine (PSM) can operate in both generator and motor modes compared with conventional hydro-generators. So PSM should be capable of withstanding the impact of power system disturbance in generator mode and possess special operating ability in motor mode. IEC60034–1:2004 “Rotating electrical machines — Rating and performance” prescribe that polyphase synchronous (salient pole) motor...
Mobile platforms have the resource-constrained characteristic, demanding to optimize the program to make up for the relative lack of resources. In this paper, using Symbian C++ as the development language, mainly optimize the code side and display side for the Symbian platform applications. Experimental results show that the technique improves efficiency and user experience degree.
Syncopation of Chinese phonetic string is the basis of Chinese Sentential Input. The traditional matching algorithm of phonetic string only brings one segmentation result and thus leads to the incomplete containing of the ambiguous results and the failure of the phonetic string conversion. The paper raised a improved method for the syncopation of Chinese phonetic string. By adopting a Bidirectional...
Arsenic (As) is one of the highly toxic elements, and many diseases have been linked to the consumption of arsenic containing water in many places of the world. The As (III) adsorption capacity by AA and the effects of organic phosphorus, S2−, pH and PO43− on the As (III) removal by AA was studied. The results showed that AA is a adsorbent for effective As (III), and the maximal adsorption capacity...
The current input methods of Tibetan on mobile phone are almost non-intelligent with slow development. Most of them have the defects of unsightly font, complex operation and low efficiency. In order to solve these problems, a new Tibetan intelligent input method is proposed and we implement this design in MTK mobile phone platform. This input method adopts new system architecture and intelligent search...
This paper presents a new method based on digital image processing to realize the real-time automatic vehicle speed monitoring using video camera. Based on geometric optics, it first presents a simplified method to accurately map the coordinates in image domain into real-world domain. The second part is focused on the vehicle detection in digital image frames in video stream. Experiment shows it requires...
In the problem of multiple criteria decision making, there are situations in which information is incomplete or imprecise or views that are subjective or endowed with linguistic characteristics creating a "fuzzy" decision making environment, some index can't be expressed by certain number, just only expressed by linguistic words, under this situation, we must use fuzzy decision making method...
This paper presents a real-time robust algorithm to detect and accurately locate the circular objects in digital images. The algorithm consists of four steps.First the edge pixels are extracted using Canny edge detection algorithm followed by a noise removal process to remove the non-circle edge points.Afterwards, a direct least square fitting algorithm is developed to calculate radius and circle...
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