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.
Traditional data-driven prognostics often requires a large amount of failure data for the offline training in order to achieve good accuracy for the online prediction. However, in many engineered systems, failure data are fairly expensive and time-consuming to obtain while suspension data are readily available. In such cases, it becomes essentially critical to utilize suspension data, which may carry...
Magnetic dipole positioning technique has attracted more and more attention recently, for its increasing applications in medical, traffic, and the tracking of motion objective, because it provides high accuracy and fast velocity. Typically, a nonlinear optimization algorithm is applied to such a problem, but a linear algorithm is preferable for faster, more reliable computation, and lower complexity...
Wireless capsule endoscopy (WCE) is a new technology to examine the gastrointestinal tract. However, it takes a WCE about eight hours on average to complete a test for a patient. In this paper, we design a portable image receiving system and it can receive, save and view the image when capsule endoscopes working in a patients' gastrointestinal tract. Compared to the WCE yielded by Given Imaging, the...
This paper proposed a new stereo matching method with a combination of cross-based support aggregation based on the assumption that neighboring pixels with similar colors should have the same disparities and an efficient belief propagation optimization algorithm. With the merits of both local method and global method, we first propose a novel matching cost function incorporating the edge information...
Correspondence searching among different images is a fundamental problem in computer vision. It is important to find correspondences correctly and rapidly, especially for real-time tracking systems. Therefore, the definition of search areas in images is crucial. Traditional epipolar constraint is not noise-enduring; some reformative methods lack explicit geometric meanings. All of them cannot help...
Electromagnetically induced transparency — Like spectrum with tunable group delay is observed in a periodically poled LiNbO3 with a central defect when an electric field is applied. A low voltage bulk phase shifter is obtained.
Capsule endoscopy (CE) is a revolutionary technology that enables physicians to examine the whole digestive tract in human body in a minimally noninvasive manner. However, it is reported that the large amount of video data yielded in each examination produces a troublesome and time consuming task for a clinician and it takes about two hours on average to examine. To reduce such a heavy load for clinicians,...
In recent years, LED has been widely used in the street-lamp lighting for its energy-saving and environmental protection. In order to meet with the electrical characteristic of high-power LED lighting, a quasi-resonant LED street-lamp power supply with high-voltage and constant-current control was designed by using FAN6300 on the basis of the traditional hard-switched flyback converter. The operating...
La0.9Sb0.1MnO3 (LSMO) thin films were deposited on single-crystal LaAlO3 (001) substrates by pulsed laser deposition technique. The films have a perovskite single-phase structure from X-ray diffraction pattern. The electrical transport and magnetic properties have been investigated for La0.9Sb0.1MnO3 thin films with thickness 300 nm. The result indicate that the film perform the colossal magnetoresistance...
The traditional data-driven prognostic approach is to construct multiple candidate algorithms using a training data set, evaluate their respective performance using a testing data set, and select the one with the best performance while discarding all the others. This approach has three shortcomings: (i) the selected standalone algorithm may not be robust, i.e., it may be less accurate when the real...
Auto-focus systems always suffer from the problem of poor sensitivity of focus functions and long focus time. This paper proposes an adaptive method with FPGA to solve this problem. The method is based on image block region, which brings about two advantages. One is that the weights can be set for each image block; this will enhance the sensitivity of focus function. The other is that each image block...
A remote wireless monitoring terminal design, using ARM microprocessor as its core controller, is proposed in this paper. The whole system includes two sections. The first is the acquiring of physical signal design as monitoring terminal, which is composed of Blood Pressure Module, Blood Oxygen Module, ECG (Electrocardiogram), and respiration. The second is a method to achieve the function of remote...
Wireless Capsule Endoscopy (WCE) constitutes a recent technological breakthrough that enables the observation of the gastrointestinal tract (GT) and especially the entire small bowel in a non-invasive way compared to the traditional imaging techniques. A primary difficulty with the management of WCE videos is that reviewing capsule endoscopic video is a labour intensive task and very time consuming...
The new improved method is based on the magnetic field generating by excitation sources and two sensors sensing. The excitation sources are three orthogonal coils and the coils create the variable magnetic field. The two sensors can receive the information of the magnetic field and they are fixed with an included angle (a constant value less than 90 degree) in order to minimize the size of sensor...
Wireless Capsule Endoscopy (WCE) is the most accurate, patient-friendly diagnostic tool that allows physicians to see the patient's whole gastrointestinal tract, especially the small intestine. However, reviewing capsule endoscopic video is a labor intensive task and very time consuming. Also the diagnosis process by WCE videos is not real-time. All above limitations motivate us to develop an approach...
Based on the requirements of Automated External Defibrillator (AED) system, the Body Impedance Measurement plays a very important role in the AED system. We choose the function generator, whose main chip is MAX038, the range of the signal's frequency can be 0.1Hz∼2MHz when the signal goes through an external resistor and capacitor net. Then the Voltage-Controlled Current Source (VCCS) can convert...
A surgical robot usually utilizes a small marker ball to implement positioning task. However, a tough problem of this system is that images gathered in this system are always distorted, which reduces the accuracy of our positioning. Conventional distortion correction methods have to compute the whole image before determine a certain point's ideal position, which is time consuming and cannot meet the...
At present, the application of Capsule endoscopy (CE) faces some extremely important issues, e.g., image quality and field of view, which causing difficulties for doctors to make an accurate diagnosis. It's a technical difficulty to acquire wide-angle internal intestinal image under the volume restrictions of CE. In this paper, a simple and practical design of CE lens aimed to clearer and wider-angle...
This paper presents a novel approach to active capsule robot, traversing in a tubular and compliant environment containing solid-liquid mixture. One of the application fields is active capsule endoscopy intended to navigate inside the gastrointestinal tract for diagnosis and therapy. This robot is driven by a screw impeller, which converts rotation to axial motion in two ways: one is through fluid...
This paper proposes a support vector machine (SVM) for real-time detection of premature ventricular contraction (PVC) from normal beats and others. This includes a signal feature extraction module and a statistical pattern recognition module. In feature extraction, time, frequency and morphological features are extracted, here six features are selected and made up a feature vector for input the pattern...
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.