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.
Hybrid electric vehicles are one of the most practicable technologies in the automobile industry to conserve resources and to protect the environment. Mode transitions between different modes are critical to improve fuel economy and driving performances. Due to the response delay of the engine and the engagement of the clutch, smooth transitions are sometimes difficult to achieve. Fuzzy sliding mode...
Previous many researches have confirmed that human adapt the position of digits to object attribute, for example, the shape of objects and center of mass (COM). Eight healthy subjects took part in the experiment (four females and four males, aged between 20 and 25 years), and they were righthanded. The goal of this research was to confirm the influence of object's vision and weight on digit placement...
Dexterous object manipulation requires suitable control of grip force, load force and digit positions. To keep an object stable in the air, force magnitude, force direction and digit positions should be coordinated, producing compensatory torque that could balance the external torque and maintain a minimal object roll. Six males and 6 females enrolled in the study. In the experiment, subjects were...
Load forecasting is the basis of the design and implementation of the control strategy of the combined cooling heating and power (CCHP) system, and the precision affects the comprehensive energy efficiency of the system directly. In this paper, the gray relational analysis method is used to indicate the strong coupling relationship among the loads of heating, cooling and electricity in the system...
The aim of this work is to explore the relationship between the chemical constituents of Yinhuang Granules (YHG) and in vitro antibacterial activity of serum. In this article, 100 batches of YHG samples were collected, and the fingerprints of chemical constituents and antibacterial activity values were determined. Furthermore, a model that characterizes the relationship between the fingerprints and...
This paper proposes a sensorless speed control method combining sliding mode observer (SMO) and model reference adaptive system (MRAS) for the surface permanent magnet synchronous motor drives. This hybrid method can guarantee the convergence of both speed and position estimation simultaneously. In order to eliminate the torque fluctuations and mitigate the influence of harmonic components in the...
Nowadays, research on the reliability improvement of T-type three-level inverters is studied as an important issue. In this paper, a novel fault tolerant control strategy based on model predictive control (MPC) is proposed for open-circuit faults in switch devices. When an open-circuit fault occurs to neutral-point switches, the impossible switching states of zero- and small-voltage vectors should...
Paralleled inverters have the merits of high power rating, improved reliability and convenient maintenance, but zero-sequence circulating current (ZSCC) will occur and lead to current distortion and system loss. The ZSCC control is more complicated when adopting three-level topology and increasing paralleled number. This paper addresses the suppression of ZSCC in multi-paralleled three-level T-type...
The purpose of this study was to explore the relationship between grip strength and inter-muscular coordination of the forearms and hands. Twenty-four healthy young volunteers participated in the experiment. The subjects were instructed to grip hydraulic hand dynamometer with five force levels-maximal voluntary contraction (MVC), 70% MVC, 50% MVC, 30% MVC and without any contraction. Muscle activity...
The thumb and index finger are important digits to performed dexterous and complex manipulation of objects. However, the local muscle fatigue will induce the capacity of force production and impair the precision motor control of the thumb and index finger. This study focused on the exercise-induced local muscle fatigue influencing the COP (center of pressure) area, the SD and the PA (projection angle)...
The postural instability was observed in patients following-stroke during standing, showing an altered center of mass acceleration (COMacc). This study aimed to investigate the effects of stroke on fluctuation and complexity of COMacc during quiet standing. Eleven stroke survivals and eleven gender- and age-matched healthy subjects participated in this experiment. The COMacc series in anteroposterior...
Frequency-domain criterion on containment control for general linear multi-agent systems with time delay is studied under the directed network topology. A distributed protocol with time-invariant delay is proposed. When time-delay is an unknown constant, frequency-domain criterion on containment control of general linear multi-agent systems with delay is obtained, and an upper bound of delay is given...
In this paper we demonstrate the implementation of optical delay lines on a programmable hexagonal waveguide mesh integrated in Silicon on Insulator (SOI). This building block enables the synthesis of reconfigurable discrete-time filters and beamforming networks.
Advanced adiabatic compressed air energy storage (AA-CAES) system can effectively stabilize the fluctuations of new energy, and supply cooling, heating and power. This paper proposes an improved multi-stage AA-CAES system, in which a dual preheating structure is innovatively used between the expanders. And combined cooling, heating, and power (CCHP) model of AA-CAES system is proposed, in order to...
Co-simulation can greatly improve the simulation accuracy by integrating advantages of different software in a unified system. In this paper, co-simulation of energy management strategy for hybrid electric vehicle (HEV) is implemented through the secondary development in AVL InMotion system. Firstly, the models of the virtual driver, 3D road and traffic environment are realized in IPG CarMaker. Secondary,...
In this study, we aimed to recognize six hand motions using surface electromyogram (sEMG) signals recorded from eight muscles of the right hand. Twenty-five healthy subjects participated in this experiment. Data were segmented using windows of 250-ms length with a 150-ms overlapping. In this paper, we extracted 24 features per muscle. Three feature sets-the original features, the features produced...
The purpose of this study was to investigate changes of the maximal reaching distance (MRD) and the amplitude of electromyography (EMG) in lower limbs during reaching forward (RF) test with outstretched arm in the elderly. Ten healthy elderly subjects and ten healthy young subjects participated in this study. A position sensor was used to record the position coordinates of fingertip, and the EMG signals...
The standing balance undergoes declines with aging that contributes the fall of the elderly. But the age-related balance control during quiet standing upon a slope has not been fully understood. This study aimed to investigate the effects of aging on muscle activation during quiet standing on a slope with different angles. Sixteen healthy young subjects and 16 healthy elderly subjects participated...
In this paper, we aimed to investigate the difference between the surface electromyogram (sEMG) signals recorded from the right hand and left hand by means of the statistical analysis of the root mean square (RMS). Twenty-five healthy subjects participated in this experiment. For the entail 19 s recorded data of every repetition, we selected a window length of 250 ms data start from the beginning...
Big data technology refers to the rapid acquisition of valuable information from various types of large amounts of data. It can be divided into 8 technologies: data acquisition, data access, infrastructure, data processing, statistical analysis, data mining, model prediction and results presentation. The paper presents improved statistical analysis method based on big data technology. A statistical...
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.