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.
In this study, the LQR control theory was employed to control the upright inverted pendulum to be balanced. The traditional controller was designed by the mathematical model of the physical system, but fuzzy controller collected set theory, membership function and control knowledge. In fact, LQR controllers are able to processes make complex and inexact mathematical models be controlled well. There...
This paper considers the fundamental properties of polytopes in Banach space. A norm is defined for the polytopes and the preliminarily properties are then analyzed. It is proved that the linear summation of two polytopes is still a polytope. For a given compact set, its polytope is compact if and only if the supporting space is with finite dimension. If the dimension of its supporting space is infinite,...
Detecting the variety of surrounding environment is one of the basic function for any robot to operate and interact with human being. With accurate interaction, the robot can fulfill its mission and assist human more reliably, effectively, and efficiently. In this paper, we propose a safer Bluetooth controlled robot from a smart phone with collision prevention based on ultrasonic module. The system...
This study presented a Leap Motion somatosensory controlled switches. The switches were implemented by the relays. The “open” or “short” of the switching circuit were controlled by the sensing of the Leap Motion somatosensory module. The virtual switches on the screen have designed to be 5 circle buttons. When the sensing hand touched the circle buttons virtually, the programming language “Processing”...
This paper presents the design and analysis of wireless power transfer (WPT) system on biological media. The WPT system operates at 6.78-MHz industrial, scientific, and medical (ISM) radio band. In addition, three building blocks: transmitter (TX), receiver (RX), and resonant tank are used to construct the WPT system. To gain more insight into the WPT on biological media, pork muscle is utilized in...
Based on the cloud-to-ground (CG) flashes data from 2010 to 2013 obtained- by the VLF lightning locating networks in Hainan Province, the temporal and spatial characteristics of cloud-to-ground (CG) flashes activities were analyzed. The results indicated that more than 99% of CG flashes occurred between April and October and two peaks of CG activity appeared in May (23%) and August (30%).The CG flashes...
Diabetes is one of the most prevalent diseases in medical field. We propose an ensemble method for diagnosis of diabetes on traditional Chinese medicine electronic nose signals. To evaluate the effectiveness of our method, we carry out the experiments by comparing single classifier with ensemble classifiers based on support vector machine and logistic classification model. The proposed method shows...
The residual life prediction of aero-engine is important for ensuring flight safety and reducing operating costs for airlines. Since there are varied performance parameters of aero-engine, it is difficult to use comprehensively these performance parameters to predict the residual life. This paper exploits Support Vector Regression Machine (SVR) in predicting the trend of varied performance parameters...
In this paper, a method for multi-sensor information fusion based on D-S evidence theory is discussed. An aero-engine gas path component is used as the research object. The information fusion researches are executed on fault information level and information decision level. The effectiveness of the proposed method for comprehensive fault diagnosis of complex system is illustrated by a case study.
In this paper, a new reliability analysis method is developed for turbopump device with the zero-failure life testing data. To assess the reliability of turbopump device with zero-failure data, firstly, equivalent failure theory is used to convert the zero-failure data into equivalent failure data, and then E-Bayesian estimation combing data fusion method are introduced to calculate its reliability...
Robots can adapt strides according to ground conditions and walk stably in different environments. This study uses fuzzy logic control and Linear Quadratic Regulator (LQR) control theory on biped robot system to achieve the development of balanced and fast footsteps. Traditional controllers are designed according to mathematical models of physical systems, while fuzzy controller is a physical system...
This paper presents a practical comprehensive information system for detecting urban active faults using WebGIS, data fusion, the Spatial Database Engine (SDE), network and RAID5, and other technologies. This system is designed to provide data and a platform for further quantitative analysis of active faults, to protect against and mitigate earthquake disasters, and to serve as a scientific reference...
In this paper, the functional commands based on hand gesture are designed by Hu moments and contour sequence moments, which are invariant to the translation, rotation and scale of a hand gesture. First, the original image with a hand gesture is transformed into the color space of YCrCb. The segmentation of the skin-like objects is obtained by suitable thresholds of Cr and Cb. In sequence, the morphological...
This paper expounds the urban environment water ecosystem formed and biological catabolic mechanism, analyzes the representing function of phospholipid fatty acid technology to microbial community structure and environmental pressure, and points out the ecological significance of phospholipid fatty acid technology applied on urban water ecological restoration.
Semi-trailer frame performance has very important influence on stiffness and strength and fatigue resistance performance and vibration of the vehicle characteristics. A type semi-trailer frame is taken as the research object, solid model was established by Solid Works software, and its finite element model is established based on the FEA software Ansys Workbench. Modal analysis including prestressed...
The piston membrane is the core part of film type cylinder, whose performance directly affects the pneumatic brake life. A optimization model of Piston Membrane is established according to a certain Film Type Cylinder. Using Multidisciplinary design optimization software iSIGHT and finite element analysis software ANSYS and the sequential quadratic programming method, the model is solved under the...
A DSP-based design method of finger vein recognition was proposed, and a finger vein authentication system FV-1 was developed. In this system, finger vein images were captured with infrared, and normalized through rotation correction, then they were segmented and thinned to wipe off useless segments. Finally, features on vein points were obtained and two finger vein images were matched in view of...
Six sites were set up along water areas of the White Goose Pond of Pearl River and the Guanzhou River in Guangzhou Higher Education Mega Center. The surface sediments were obtained by using a sediment trap. The concentrations of 16 kinds of polycyclic aromatic hydrocarbons(PAHs) in the sediments from Pearl River were analyzed, based on the USEPA 8000 serial methods, and under quality assurance and...
The predigested physical model is set up in this paper according to the geometry shape of the earthing electrode, and the finite-difference time-domain (FDTD) method is used to get the transient grounding resistance (TGR) waveform of the earthing electrode, based on the experimental method. It is showed that the calculation results and the experimental results match well.
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.