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.
Structural parameter is an important factor which limits the improvement of precision in the three-dimensional measuring system of line-structured light. In order to improve the precision, we have developed an improved approach for choosing optimal structural parameters. A unified mathematical model with advantages of ease of use and compatibility is established. On this basis, errors of three-dimensional...
This paper presents a piezoelectric energy harvester (PEH) which can convert fluid kinetic energy into electricity with vortex induced vibration (VIV). The PEH is composed by a piezoelectric cantilever beam and a cylinder extension. Dynamic response and energy harvesting of the PEH are studied numerically. It is found that maximum output power can be obtained with optimal resistance and the more power...
Software Testing is an approach to ensuring the quality of software systems. Testing of safety-critical systems often requires conformance to certain code coverage criteria, including for example, in aviation, Modified Condition/Decision Coverage (MC/DC). In some situations, however, access to the actual code may be restricted with black Box approaches, and testers may only be able to use models of...
The Simulink/Stateflow is a commonly used approach in modeling embedded systems. This paper presents a model driven testing method for embedded systems using Simulink/Stateflow model, where a test model of a system constructed with Simulink/Stateflow is to be converted to hierarchical interface automata. Dependencies within hierarchical interface automata and test sequences are acquired through analyzing...
Commutation failure is a serious malfunction in high-voltage direct current (HVdc) converters and is mainly caused by ac side faults, where the change of dc current during fault conditions should be given adequate attention. Employing superconducting fault current limiters (SFCLs) for an HVdc system can suppress its dc fault current’s amplitude and maintain a small rate of the dc current change, which...
The self-balance one-legged robot (one-legged robot) is composed of frame and pneumatic actuated leg. The swing angle between the leg and the frame (the swing angle) can be adjusted by changing the extension elongation of two hydraulic cylinders. According to the degrees of freedom of the attitude adjustment mechanism, the two hydraulic cylinders are mounted by three Hook joints and one rotating pair...
Objective: To evaluate the capability of Critical Condition Scoring Scale of Traditional Chinese Medicine (CSSTCM) in predicting complication morbidity and mortality among elder patients who received orthopedic surgery. Methods: Evaluate patients in second orthopedic department of Guangdong Provincial Hospital of Chinese Medicine from September 2012 to March 2013 by CSSTCM and POSSUM. All data were...
Thermal modelling for lithium ion batteries is important to evaluate battery thermal safety and to refine battery thermal designs. To develop a reliable and efficient thermal model, the following key factors needs to be addressed: the techniques to accurately determine the thermal parameters and heat generation rates, the reasonably simplified thermo-electrical equations and the experimental validation...
Recent works on Information Centric Networking enable the exploitation of the caching resources in the new generation of routers (Content Routers or CR). So far, only a basic Least Recently Used (LRU) strategy implemented on every CR has been proposed. More generally, the research community lacks methods for analyzing and evaluating caching policies (other than LRU) in generic multi-cache topologies...
Simulation modeling is an increasingly popular and effective tool for analyzing transportation problems that are not amendable to study by other means. For any simulation study, model calibration and validation is a crucial step to obtaining any results from analysis. This paper proposed a systematic, practical procedure for microscopic simulation model calibration and validation. The validity of...
Thermoforming is one of the most versatile and economical processes available for polymer products. The cooling process is one of the key processes of thermoforming which effects to quality of final products. In this study, two kinds of 1-d analysis models were developed under the condition of checking the possibility of changing a 2-d to a 1-d problem in a previous study. At first, a model for stability...
How to collect data energy-efficiently from sensor nodes is an important research issue in wireless sensor networks. In this paper, spatial correlation of sensor data is exploited to address the problem of collecting data from sensor nodes. In our approach, a spatial model is maintained by a cluster head and a replica of the model is maintained the base station. The base station uses the replica model...
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.