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.
The statistics of extreme wave heights is of great importance in many ocean and coastal engineering applications and is an important part of physical oceanography. For example, in the design and operation of marine structures one needs to take the influence of extreme ocean environments into account and estimates of very large return values of wave heights are often needed. However, due to the limited...
Control of renewables by Synchronous Power Controller (SPC) technology provides virtual damping and inertia which results to support phase stability on the grid and keep synchronism of interconnected areas tighter. Serving these benefits needs to have proper dynamic interaction between renewables and grid. In this paper, according to the dynamic modeling of Renewable Static Synchronous Generation...
In the urban landscape, sculpture is vital to represent culture tradition of the city. It is a soul part of whole landscape. This paper uses the main city in Chinas park or green place as the research object and selects 100 representative samples for quantitative evaluation of the garden sculpture by SBE method. By using correlation analysis, variance analysis, stepwise regression method, it determines...
Insurance plays a key role in the financial industry, and it is also of great importance for people's socio-economic life. Therefore, in this paper, we demonstrate on the problem of analyzing the operating performance of insurance companies, and it is crucial for modern financial industry development. Firstly, we design an index system for evaluating operating performance of insurance companies, which...
This work proposes an analytical method for calculating sensitivity index. The proposed method is based on one-at-a-time measurements and calculates the difference between output values and the base solution to define the impact caused by each parameter in the system. The results indicated that the analytical method provides adequate values for the sensitivity index even when the parameters have minor...
The report is devoted to the systematization of large terminological texts on the basis of a hierarchical representation of definitions of concepts. By integration, such models form a semantic network of terms. Thanks to the binary, homogeneous and oriented nature of this network, it is possible to obtain a hierarchical representation model and quantitative indices indicators for evaluating the integrity...
As a key component of DC medium voltage breaker, the switch mechanism is required to open in high-speed and can withstand the breaking voltage which is generated during opening motion. Thus, the design of driving circuit of switch mechanism is very important to optimize the mechanism structure and improve mechanism opening characteristics. First the motion principle of high-speed switch was given...
Circuit breakers are important equipment to control the energy distribution and fault isolation in power grid. With the development of the power grid in China, the evaluation of health status of circuit breaker in operation becomes an important part of the operation management. A number of studies have been made on the evaluation of circuit breaker health status, but are mostly limited to interpretation...
In this paper, the characteristics of two different uniformly spaced circular arrays are analyzed, including the beam width, the sidelobe peak level, the resolution and the Cramer-Rao bound(CRB) of the array. Firstly, according to the structure of the dual circular array, the formula of array pattern, the formula of resolution and the formula of CRB are deduced. Secondly, the effects of the elements...
For the deficiency of the incidence model, the incidence model based on the included angle of vectors is presented and is extended to the panel data. In order to describe the incidence between the sequences, which is projected to n-dimensional vector. The included angle of vectors reacts the difference of the sequences in similarity. The incidence model based on the included angle of vectors is defined,...
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.
The BRPs require huge investment and have the characteristic of high public welfare. The lack of public participation in decision-making can easily cause the group events. To achieve the maximum public interest, this paper will introduce public participation into BRPs decision-making process. Using intuitionistic fuzzy evaluation, similarity degree method, cluster analysis establish the BRPs interactive...
As a major part of household electricity load in summer, air conditioning (AC) consumption demonstrates enormous demand response (DR) potentials and numerous AC based DR programs are carried out annually. Understanding electricity consumption behaviors is one of the key elements for utilities to design more cost-effective DR programs. So studying on the AC electricity usage habits is of great significance...
Efficient management of water resources is a growing global concern. In Brazil, most regions deal with problems related to high rates of water loss in distribution systems. This situation involves a complex environment with multiple decision-makers, several alternatives, and subjective variables. Therefore, its evaluations require interactivity, clarity, learning, and that plausible aspects be discerned...
A multilevel evaluation model integrating Triangular Fuzzy Numbers (TFNs), Analytical Hierarchical Process (AHP) and Grey Relational Analysis (GRA) was Proposed to evaluate Brownfield Redevelopment Projects (BRPs). Three schemes were proposed including 1: Housing Society, 2: Industrial Park 3: Commercial Development. Initially, primary indicators were identified through extensive literature review...
Based on the analysis and summary of the features of existing STL (Stereolithography) model slicing algorithms, the STL model slicing algorithm that based on dynamic adjacent edge is proposed. According to the Z-max and Z-min of the Z-coordinate projection in the slice direction and the thickness of the every layer, achieving slicing the whole STL model, and the topological relation of the adjacent...
The fault of power distribution network may lead to customers power failure interruption. To nalyze and evaluate the power failure interruption caused by distribution network fault, this paper establishes a comprehensive evaluation indices set for power distribution network fault power failure. The normal cloud model is considered to be able to overcome the uncertainty, randomness and fuzziness of...
An important field in exploratory sensory data analysis is the segmentation of time-series data to identify activities of interest. In this work, we analyse the performance of univariate and multi-sensor Bayesian change detection algorithms in segmenting accelerometer data. In particular, we provide theoretical analysis and also performance evaluation on synthetic data and real-world data. The results...
In this paper, we study the use of redundancy to reduce latency and increase reliability in communication networks. The work is motivated in particular by wireless networks, where channels may be unreliable and channel characteristics may vary over time. The objective is to provide an analysis of the gains achievable through the use of redundant messages. Redundancy increases the network load and...
This paper presents a practical evaluation method for the operation quality of smart substation secondary equipment. The evaluation method includes evaluation index system, evaluation model and evaluation process. Taking full account of the main factors which affect the operation quality of smart substation secondary equipment, the veto index is proposed and a relatively complete evaluation index...
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.