scholarly journals Multi-index data dimension reduction approach and its applicability in the calculation of indicators of hydrological alteration

2018 ◽  
Vol 50 (1) ◽  
pp. 231-243 ◽  
Author(s):  
Wenhai Zhang ◽  
Yangwen Jia ◽  
Jinjin Ge ◽  
Xiaorong Huang ◽  
Guangheng Ni ◽  
...  
Keyword(s):  
Dimension Reduction ◽  
Evaluation Method ◽  
Practical Application ◽  
Multi Index ◽  
Single Index ◽  
Hydrological Alteration ◽  
Computational Data ◽  
Ecological Relationship ◽  
Data Volume ◽  
Data Requirements

AbstractThe length of record (LOR) method is an evaluation method that provides quantitative advice for the amount of computational data required for use of the indicators of hydrological alteration (IHA). The use of multi-index hydrological indicators to reflect river hydrological–ecological characteristics is the essence of the IHA method, while the LOR evaluation result using a single index does not have practical application value in the absence of IHA data volume. In this paper, we expand the LOR method from single index version into multi-index version, apply it to comprehensively analyze the credibility of hydrological alteration (HA) multi-indicators under different data volumes, and explore the relationship between multi-index LOR results and data requirements. Combined with the hydrological–ecological relationship, the practical application criteria of LOR dimension reduction under the condition of multiple HA indicators is given. The results show that the LOR results corresponding to each group of indicators in IHA have different data requirements, so an in-depth understanding of the hydrological–ecological relationship is the key to LOR's application of IHA data dimension reduction. In addition, we discuss the limitations of the LOR method of multi-index dimension reduction and its application value in IHA calculations.

A Computer Aided Assembly Sequence Evaluation Method Based on the Fuzzy Theory for the Complex Products

2011 ◽  
Vol 421 ◽  
pp. 381-387
Author(s):  
Lei Zhao ◽  
Yuan Li ◽  
Yan Ping Wang
Keyword(s):  
Decision Making ◽  
Evaluation Method ◽  
Fuzzy Theory ◽  
Assembly Sequence ◽  
Practical Application ◽  
Multi Index ◽  
Complex Products ◽  
Evaluation Mode ◽  
Computer Aided ◽  
Distributed Method

Aim at the characteristic of airplane assembly sequence evaluation, which has too many rules, and the quantity process of qualitative rules is too complicated, this paper presents an evaluation mode based on the fuzzy theory and the multi-index progressive model. According to the evaluation rules space and the coefficient distributed method of rules compared, it divides the rules space into force associated decision-making gather and weak associated decision-making gather by defining the cut value. Then it adopts the maximal subjection fundamental to implement the function of assembly sequence evaluation. An instance about airplane sub-assembly is used to prove this method can solve a practical application availably.

Fuzzy Matter-Element Evaluation Method for Analysis of Debris Flow Risk Assessment

2012 ◽  
Vol 446-449 ◽  
pp. 3058-3061 ◽  
Author(s):  
Chun Tan ◽  
Jian Ping Chen ◽  
Yu Zhen Pan ◽  
Cen Cen Niu ◽  
Li Ming Xu
Keyword(s):  
Risk Assessment ◽  
Debris Flow ◽  
Information Entropy ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Practical Application ◽  
Element Analysis ◽  
Matter Element Analysis ◽  
Concept Of Information

Based on the principle of fuzzy matter-element analysis, the concept of information entropy is introduced to establish a fuzzy matter-element evaluation method. This method is utilized to comprehensively evaluate the degree of debris flow. The classifications of debris flow are regarded as the objects of matter-element and their indexes for evaluation as well as the corresponding fuzzy values are used to construct the composite fuzzy matter-elements. By calculating the relevancy the comprehensive evaluation of debris flow can be carried out. This model is applied to analyze the degree of debris flow in the practical application. The application shows that the model is effective and practical.

Evaluation Method for Band Selection Algorithms of Hyperspectral Image

2013 ◽  
Vol 684 ◽  
pp. 495-498
Author(s):  
Bai He Wang ◽  
Shi Qi Huang ◽  
Yi Hong Li
Keyword(s):  
Data Fusion ◽  
Dimension Reduction ◽  
Evaluation Method ◽  
Hyperspectral Image ◽  
Band Selection ◽  
Selection Algorithm ◽  
Amount Of Information ◽  
Algorithm Evaluation ◽  
Common Band ◽  
Selection Algorithms

Band selection algorithm is most important in data dimension reduction of hyperspectral image. There are many algorithms of band selection, but there are only few methods to do algorithm evaluation. A method is put forward in this paper to evaluate the band selection algorithm of hyperspectral image. The amount of information, brightness, image contrast and definition are defined as 4 indexes to measure deferent data fusion based on various band selection results. Based on the measurement, the evaluation of band selection algorithm is realized. In the paper, the evaluation method is used in the compare of 4 common band selection algorithms, the result of measurement is analyzed and the feasibility is verified.

scholarly journals Research on cloud computing service based on trust access control

2020 ◽  
Vol 12 ◽  
pp. 184797901989744 ◽  
Author(s):  
Panjun Sun
Keyword(s):  
Access Control ◽  
Evaluation Method ◽  
Research Performance ◽  
Cloud Service ◽  
Cloud Services ◽  
Trust Evaluation ◽  
Practical Application ◽  
Cloud Service Provider ◽  
Direct Trust ◽  
Cloud Computing Service

Recently, more and more network fraud incidents have damaged the interests of cloud service traders. To enhance mutual trust and win–win cooperation between the users and the cloud service provider, in the article, we construct a trust access control model for cloud services. First, we propose a trust evaluation method based on direct trust, trust risk, feedback trust, reward penalty, and obligation trust to express the complexity and uncertainty of trust relationship. Second, we propose trust evaluation and weight algorithm of trust factor by information entropy and maximum dispersion; therefore, our model has a better scientific and higher practical application value. Finally, we design related comparative experiments of three models to verify the efficiency, success rate, accuracy of trust evaluation, and privacy disclosure date, and these results show that our research performance is quite superior.

Software Quality Evaluation for Control System Based on Extension Theory

2014 ◽  
Vol 945-949 ◽  
pp. 3331-3335
Author(s):  
Xiao Ying Liu ◽  
Jian Zhang
Keyword(s):  
Control System ◽  
Software Quality ◽  
Quality Evaluation ◽  
Evaluation Method ◽  
Mechanical Design ◽  
Engineering Analysis ◽  
Analysis Method ◽  
Practical Application ◽  
Software Quality Evaluation ◽  
Function Calculation

A software quality evaluation method for control system based on the extension engineering analysis method is proposed. The evaluating index system of software quality evaluation for control system was constructed. The matter elements models were constructed, and the goodness of mechanical design scheme was computed by using goodness evaluation method based on correlation function calculation. Then the pros or cons of system to be evaluated were determined by comparing the goodness value of each evaluation grade. Finally, the practical application showed that the evaluation method was scientific, clear, and effective and had good practicality.

Instability and Imbalance Response of Large Induction Motor Rotor by Unbalanced Magnetic Pull

2004 ◽  
Vol 10 (3) ◽  
pp. 447-460 ◽  
Author(s):  
Bo-Suk Yang ◽  
Yong-Han Kim ◽  
Byung-Gu Son
Keyword(s):  
Induction Motor ◽  
Transfer Matrix Method ◽  
Analytical Method ◽  
Electromagnetic Force ◽  
Matrix Method ◽  
Evaluation Method ◽  
Induction Motors ◽  
Practical Application ◽  
Time Transfer ◽  
Second Order Differential Equations

This paper deals with a general analytical method for analyzing the instability and mechanical imbalance response of induction motors considering unbalanced electromagnetic forces produced in the induction motors with rotor eccentricity and phase unbalance. The equations to be solved are a set of second-order differential equations that give matrices with periodic coefficients that are a function of time due to the unbalanced electromagnetic force. The evaluation method of rotor instability zones is presented by a time transfer matrix method. The Newmark β method is adapted to solve for an imbalance response. A practical application is given for a large induction motor. The results show that the proposed method is satisfactory.

Practical Application of Network Multimedia Courseware in College Basketball Teaching

2020 ◽  
Author(s):  
Wengang Chen ◽  
Fang Wang
Keyword(s):  
Evaluation Method ◽  
Teaching Experiment ◽  
Basic Knowledge ◽  
Control Group ◽  
Computer Assisted ◽  
Theoretical Knowledge ◽  
Practical Application ◽  
Positive Role ◽  
Teaching Plan ◽  
College Basketball

Abstract With the continuous development of my country's sports industry, many drawbacks have appeared in traditional basketball teaching. This research mainly discusses the practical application of network multimedia courseware in college basketball teaching. Multimedia courseware teaching plan Multimedia courseware teaching plan consists of at least four parts: teaching content, teacher guidance, student learning and multimedia courseware. In the example of this study, FlashMX2004 is used to complete the multimedia courseware of basketball tactics basic teaching. The whole courseware is easy to embed in the webpage and is suitable for wireless network transmission on the Internet. Use the scanner to scan the text part into the computer, recognize it with Hanwang HWOCR5.0 recognition software, and edit it in Word. Use the video processor and audio processor of Kingsoft Hasee II to convert the VCD to the .avi video file format, use Windowsmoviemaker to edit and integrate the edited film, and finally import the required materials into Flash as needed to make the courseware . In order to ensure the correctness and effectiveness of the basic actions in the courseware, the empirical validity evaluation method is adopted, and the validity of the courseware content is tested. After the teaching experiment, in order to test the basic knowledge of basketball tactics and the theoretical knowledge of the two groups of students, a test of the theoretical knowledge of basketball tactics was carried out. The experimental group had 22 people with a score of 90 or more accounted for 27.5%, and the control group had 13 people with a score of 90 or more accounted for 16.5%. The results show that multimedia computer-assisted teaching has a positive role in cultivating students' interest in learning.

Sign in / Sign up

Export Citation Format

Share Document