The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
As the capsule endoscope lens will produce geometric distortion, while there is an angle and a corner between the camera image plane and the plane of scene, so the images of capsule endoscope get nonlinear geometric distortion. Before the capsule endoscope images are used to accurately analysis, we should eliminate these distortions. Typically, the correction uses a calibration pattern, which can...
Capsule endoscopy (CE) is a rather new imaging technique designed specially for small intestine that is untouchable for traditional endoscopy such as gastroscope and colonoscopy. At present, reviewing a whole CE video for each patient is an intensive task for physicians. Hence, computerized methods for a CE video is desired to reduce the review time for clinicians. In this paper, we utilize color...
A portable telemedicine monitoring information system is proposed in this paper, which can be used for monitoring the patient's medical or health conditions anytime and anywhere the mobile internet network exists. The system includes two main parts, the monitoring terminals and the doctor's work station in a remote hospital. The monitoring terminals use a wireless transmitter and an ARM9 embedded...
This paper presents a hybrid energy storage system (HES) composed of battery and ultracapacitor. Regenerative braking energy recovery can be effectively achieved with this system combining permanent magnet synchronous motor driving system. The performance of the battery and ultracapacitor is significantly different in the HES, and thus reasonable distribution between battery and ultracapacitor for...
This paper describes a method for automatically identifying and classifying various circular objects by image processing and machine vision technology. Firstly, the object images are acquired by an industrial camera, and the object range is determined, which is preprocessed by binary and noise filtering; Secondly, a region growing method and a circle-touching are used to find out the center of circular...
For the Wireless Capsule Endoscopy (WCE), one of the most important medical actions is to find the size of the target disease tissue, on which the proper diagnosis can be made to determine the further medical operation. Since 2D estimation results in large error for the tissue size, 3D calculation is preferred. To obtain 3D information for the objective tissue, we can apply 3D reconstruction for the...
In applications of permanent magnet, the calculation for magnetic flux intensity is of primary importance. The magnetic dipole is simple mathematic model which is used frequently. However, it is required that the evaluation points are far from the magnet; otherwise, the measured data is wrong. An approach of calculating the magnetic flux intensities at those points which are very close to the magnet...
An electromagnetic based tracking method is proposed in this paper, which can provide 6D position and orientation information. This method is based on triaxial transmitting coils and triaxial sensing coils, which are based on the electromagnetic field. Transmitting coils fed with different frequency alternating current (AC) signals comprise the magnetic field source, which can be seen as three orthogonal...
A power generator, one of the most critical components in power plant, could experience unexpected series system failures, resulting in substantial maintenance and societal cost. This paper proposes a new health diagnostics method for water-cooled power generator windings against moisture absorption. The main idea of the proposed diagnostics method is a Directional Mahalanobis Distance (DMD) based...
This paper develops a Copula-based sampling method for data-driven prognostics and health management (PHM). The principal idea is to first build statistical relationship between failure time and the time realizations at specified degradation levels on the basis of off-line training data sets, then identify possible failure times for on-line testing units based on the constructed statistical model...
This paper presents a new electromagnetic coupling mechanism called pot coil focusing on improving the inductively coupled power transfer (ICPT) system with limited transmission distance and range. Pot coil allows pick-up coil in electromagnetic field to move at larger range and ensure the output power remains unchanged. The contrast for the magnetic flux intensity distribution of pot coil and conventional...
This paper introduces a novel tracking framework for robots that can adapt various appearance changes of object and also owns the ability of reacquisition after drift. Two classifiers, LaRank and Online Random Ferns, are adopted to realize this tracking algorithm. The former one maintains the adaptive tracking using a Condensation-based method with an online support vector machine (SVM) as observation...
Magnetic endoscope imaging system is a non-radiographical imaging technique, which helps endoscopists a lot in colonoscopy. It consists of two parts: localization and display. In the part of localization, coils embedded in the colonoscope sense the magnetic field generated by excitation sources. The coupling between excitation sources and sensors can determine a set of equations which contain parameters...
Wireless capsule endoscopy (WCE) is an advanced technology that allows diagnosis inside human's digestive tract without invasiveness, however, it is a time-consuming task for clinicians to diagnose due to the large number of frames in video. A novel and efficient algorithm is proposed in this paper to help clinicians segment the WCE video automatically according to stomach, small intestine, and large...
The AC electromagnetic localization method is often used to locate the position of the objective such as the moving robot or vehicle. This technique must extract the coupling magnetic signals between the source and the receiving magnetic coils, because the localization algorithm determines objective's position and orientation by the intensities or the phases of the coupling signals. This extraction...
The magnetic coils are often used for tracking moving vehicles or robots, based on the magnetic coupling relation between the sensing coils relative to the transmitting (or source) current coils. Therefore, the accurate computation of the magnetic field distribution of a source current coil has significant effects on the computation results for the electromagnetic localization system. In this paper,...
The basic content to instruct graduation design (thesis) through co-operative education of university and corporation is to develop and improve the overall quality of students' integrated capabilities and focused on employment competitive ability. This pattern fully uses school and society that are two kinds of different education environments and resources as well as in talented persons raising aspect...
This paper specifically describes the design of hardware and software of a digital pulse oximeter based on ARM core embedded system and light-frequency converter. In this study, a light-frequency converter instead of a photodiode was adopted to receive the light transmitting, which greatly simplified the design of hardware. Besides, traditional methods of calculate frequency of rectangle signal were...
Digestive tract cancer is a big threat to human and capsule endoscopy (CE) is a relatively new technology to detect the diseases in the small bowel. Since polyp is an important symptom of digestive cancer it is important to detect them by computerized methods. In this work, we comparatively investigate computer aided detection for polyps by machine learning based methods that are built upon color...
The Metal Wrap Through (MWT) cell, which replace the metal busbars with several holes bored through the silicon wafer, is a high efficiency cell which had caught the attention of cell makers. But the contact design methodology for conventional cell is inadequate when used for MWT. This paper reports a procedure for MWT power loss calculation and drilled hole spacing optimization. First, the concept...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.