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.
Bioelectrical impedance technology is considered to be a noninvasive method of measuring heart function. Feature points extraction of impedance cardiography (ICG) signal is vital to cardiovascular disease diagnosis, and feature points extraction has curative value after operation. In this paper, the new algorithm combined with the wavelet technology to extract feature points accurately. Feature points...
Distribution grid simulation is important method to related department for the distribution grid planning, design, testing, operation and experiment. It is common method of the distribution grid protection, measurement and control equipment function test and distribution grid automation system function test. Distribution grid simulation can be divided into real-time simulation and non-real time simulation...
With the development of information technology, the electric power system has gradually entered a new stage. And the security problem of electric power system has become an important research filed. In this paper, we applied wavelet technology and digital watermarking algorithm to improve the security level of the electric power system. This two technologies can complete sensitive information hidden...
It has become a general consensus that smart grid is one of the most important technical fields for big data technology application. Power network dispatching and planning is fundamental to power industry development and construction, however, massive power data is still manually filled in, dispatching method and planning design method relies heavily on experience and single data source. This paper...
Based on the existing research of Chinese text clustering, this paper proposes an improved algorithm for the optimization of short term semantic clustering based on social media. The method of weighted factor is introduced to optimize text distance formula and related mathematical proof, the calculation process optimization design from text, written text distance calculation algorithm, the simulation...
In the wharf structure health monitoring systems, the systems exit low efficiency of data transmission and no effective data processing problems, which result in less effective reflecting the health status of the wharf structure. In order to improve the data transmission efficiency and make a better use of the data, an intelligent wireless sensor network (WSN) method and multi-sensor information fusion...
Tri-axial magnetometers used to calculate the heading information of vehicles. In this paper, a method of determining attitude variations using only one tri-axial magnetometer was proposed. The condition is that the vehicle has only four degrees of freedom (moving pitch and roll). In addition, the attitude changing process was decomposed. Therefore, the attitude was calculated with the data of current...
In order to meet the current requirement of low voltage apparatus protection function test, a design of three phase high current generator based on virtual instrument technology is proposed. The coarse-fine tuning voltage regulator with the compensation transformer structure is used in the main circuit of the current generator, which not only could extend the range of current regulation, improve current...
Very less research is conducted on limited angle Magnetorheological (MR) damper compare to continuous angle Magnetorheological dampers. Despite of fact that limited angle MR damper cannot rotate continuously but can have ability to produce more damping torque than continuous angle MR dampers. There can be several applications of vane type MR dampers on which research can be conducted for example in...
In order to solve the problem that the existing parallel manipulator is expensive, complicated design and complicated control, this paper designs a three-degree-of-freedom parallel manipulator with cam-driven single power input. The manipulator is cheap and widely used. And then its kinematics research. The freedom degree analysis of the manipulator is completed, and the kinematics is obtained. And...
Paper proposes a kind of multiple environmental parameters monitoring system for granary that is based on ZigBee network and takes ARM controller as core. With regard to hardware, monitoring circuits for temperature, humidity, CO2 concentration and grain water content are designed. With regard to control program, fuzzy intelligent algorithm is designed and transplanted to ARM controller. The test...
Based on study of risk assessment models on domestic and foreign countries' software projects, this paper adopted Fuzzy Analytic Hierarchy Process to establish the risk assessment model for software projects, so as to realize the effective risk assessment on software projects.
After a brief introduction to the concept and classification of power quality problems in power supply network, this paper focuses on the test and analysis methods of several common power quality problems. Finally, a power quality monitoring circuit is designed for a high power motor power supply network.
Based on the deficiencies for risk indicators of fault probability and consequence's application in distribution systems, the strategy of risk assessment for system operation based on health and importance indices is proposed. The health index oriented to system running states and importance index geared to the user diversity are defined, by comprehensively thinking about the development situation...
Recent years, many researchers are focus on personalized recommendation in the area of knowledge discovery. Due to the user privacy, a recommender system finds it is hard to help individual user to find the items which the user prefers quickly and precisely. So, we combine domain features with AHP model to help us solve the problem. In this paper, we introduce a new recommendation method named AHP-Based...
In view of the support vector machine (SVM) model applied in vibrant fault diagnosis for hydro-turbine generating unit, it exists problems of parameter settings and classification-plane incline due to unequal sample, which leads to lower diagnosis accuracy. As a new bionic intelligent optimization algorithm for glowworm swarm optimization(GSO), it has the characteristics of strong versatility and...
For a wireless transmission system, low efficiency is the most serious problem. Proper capacitance compensation for the system is expected to reduced reactive power and improve system efficiency. In present paper, system performances are studied and compared in two cases, no compensation and compensated by series capacitance. Then variation trend of transmission efficiency with other parameters (frequency,...
Motivated from the idea of "graphical structure plus number theory", two new set-colorings subject to some constraint sets are defined: one is the strong set-coloring (F, F') with the edge set-labelling F' induced by the vertex set-labelling F, and other one is the strongly total set-coloring. We show that every simple, connected (p,q)-graph G admits a strongly total set-labelling, and any...
The electric vehicle (EV) replacing the traditional fuel vehicle has become an inevitable trend of the development of low carbon economy because of its characteristics of green environmental protection, energy saving and high elïïciency. With the popularization of electric vehicles, random charging of scale electric vehicles in time will increase the influence of uncertain factors in power grid operation,...
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.