Dynamic Evaluation Method Of Distance Learning Quality Based On Mooc Theory

2022 ◽  
Vol 32 (1) ◽  
pp. 1
Author(s):  
Jun cheng Wang ◽  
Lin Zeng ◽  
Xiao long Wen
Keyword(s):  
Distance Learning ◽  
Evaluation Method ◽  
Dynamic Evaluation

Regional comprehensive drought disaster risk dynamic evaluation based on projection pursuit clustering

Water Policy ◽  
2018 ◽  
Vol 20 (2) ◽  
pp. 410-428 ◽  
Author(s):  
Yongnan Zhu ◽  
Lei Li ◽  
Yong Zhao ◽  
Zhongmin Liang ◽  
Haihong Li ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Dimensional Space ◽  
Projection Pursuit ◽  
Development Trend ◽  
Disaster Risk ◽  
Evaluation Index System ◽  
Dynamic Evaluation ◽  
Drought Disaster ◽  
The Development Trend

Abstract We used system theory to analyze the structure of a regional drought disaster system and separated the drought disaster risk system into three subsystems. These were drought disaster-causing factors, disaster-inducing environments, and disaster-bearing bodies. Analysis of the main factors of these subsystems allowed the establishment of a regional comprehensive drought disaster risk evaluation index system. To simultaneously evaluate the distribution and development trends of the regional comprehensive drought disaster risk, we established a dynamic evaluation model. Based on the ideas of the projection pursuit clustering method and the dynamic comprehensive evaluation method, the model can make use of multi-dimensional space–time drought disaster information. The model was applied to evaluate comprehensive drought disaster risk in the Xuzhou region, China. The evaluation results show that the method was able to illustrate the development trend and distribution of the comprehensive drought disaster risk in the Xuzhou region. The clustering zoning results show that Pizhou City is the area with the highest risk in Xuzhou, while Fengxian has the lowest. The development trend of comprehensive drought disaster risk with time is not significant.

scholarly journals Dynamic Evaluation Method of Caprock Microscopic Sealing in CO2 Sequestration Project

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Xu Han ◽  
Fuping Feng ◽  
Ziyuan Cong
Keyword(s):  
Chemical Reaction ◽  
Evaluation Method ◽  
Microscopic Mechanism ◽  
Average Pore ◽  
Average Pore Radius ◽  
Dynamic Evaluation ◽  
Sealing Ability ◽  
Key Factor ◽  
Microstructure Parameters ◽  
Change Of Microstructure

The existing statistical evaluation methods of caprock sealing ability in CO2 sequestration engineering only take into account the sealing ability of caprocks before sequestration but cannot reflect the retained sealing ability of caprock after hydrochemical reactions. A microscopic sealing evaluation method of caprock was established based on the microscopic mechanism of chemical reaction and the breakthrough pressure of caprock which, changes with the time of CO2 sequestration, was taken as the dynamic evaluation index. The results show that the change of microstructure parameters such as the average pore radius after dissolution is the essential reason that affects the variation of the caprock microscopic sealing property. Dissolution or precipitation of different caprock minerals during the chemical reaction process is the key factor that determines the decrease or increase of caprock microscopic sealing property. The evaluation method can reflect the change of microscopic sealing property of the caprocks in different areas as the sealing time goes and provides an efficient and practical quantitative evaluation method for the initial formation site selection and safety sealing in the later stage.

Experimental Research on Dynamic Evaluation Method for Scale Inhibitors of Reverse Osmosis

2012 ◽  
Vol 178-181 ◽  
pp. 479-484
Author(s):  
Xiao Ni Zhang ◽  
Xian Min Li
Keyword(s):  
Reverse Osmosis ◽  
Experimental Research ◽  
Concentration Ratio ◽  
Evaluation Method ◽  
Ion Concentration ◽  
Flow Mode ◽  
Dynamic Evaluation ◽  
Laboratory Technique ◽  
Through Flow

This paper describes a novel laboratory technique for characterizing the scale inhibitors performance of reverse osmosis. The experiment was carried out by operating the RO system in a once-through flow mode which was operated by continuous withdrawal of concentrate and permeate. The concentration ratio of reverse osmosis system is calculated by mass or flow or volume of permeate and concentrate. The performance of scale inhibitors was evaluated according to the scale ion concentration of concentrate. The results showed that the method can screen out the performance of anti-scalants quickly and with low error.

scholarly journals Comprehensive Assessment of Distance Learning Modules by Fuzzy AHP-TOPSIS Method

Mathematics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 409
Author(s):  
Svajone Bekesiene ◽  
Aidas Vasilis Vasiliauskas ◽  
Šárka Hošková-Mayerová ◽  
Virgilija Vasilienė-Vasiliauskienė
Keyword(s):  
Decision Making ◽  
Distance Learning ◽  
Quality Assessment ◽  
Evaluation Method ◽  
Fuzzy Ahp ◽  
Fuzzy Topsis ◽  
Evaluation Methodology ◽  
Practical Implementation ◽  
Ideal Solution ◽  
Analysis Method

This survey is focussed on distance learning studies, where there can be met a lot of technical obstacles, which creates complications in decision making. To get an ideal solution for these kinds of problems, the Fuzzy TOPSIS (Technique for Order Preference by Similarities to Ideal Solution) is one of the best solutions. Therefore, this paper presents the distance learning quality assessment surveys when the Fuzzy AHP (Analytic Hierarchy Process) and TOPSIS methods are used. Research results describe the application of the Fuzzy AHP—TOPSIS hybrid method. MCDM (Multi-Criteria Decision Making) programs with MATLAB (R2020b) mathematical package were written to calculate the evaluation results for three distance learning courses. In the practical implementation of the proposed distance learning module evaluation methodology, the experts’ evaluation method was applied. Thirty-four judges were chosen with specific knowledge and skills and with very different competencies to assess three alternatives by fourteen criteria. Following the experts’ evaluation, a statistical analysis method was used to process the data. After applying the complex evaluation, the comparative analysis method was used to summarize the obtained results. This work further provides useful guidelines for the development of an easily understandable hierarchy of criteria model that reflects the main goal of study quality assessment.

scholarly journals On Principles of Course Evaluation in Distance Learning Environment

10.28945/2371 ◽  
2001 ◽  
Author(s):  
Mieczyslaw Owoc ◽  
Leszek A. Maciaszek ◽  
Krzysztof Hauke
Keyword(s):  
Distance Learning ◽  
Learning Environment ◽  
Evaluation Method ◽  
Teaching Effectiveness ◽  
Course Evaluation ◽  
Quality Of Education ◽  
Management Decision ◽  
Distance Learning Environment ◽  
Education Delivery

Distance learning improves access to education and - in most cases - advances the quality of education delivery. Its key attributes are: openness, interactiveness and using multimedia teaching materials allowing: learning by anybody, at any place and anywhere. In order to assure high quality of learning, the offered courses should satisfy audience expectations and should convey knowledge in modern ways. To analysing teaching effectiveness we have evaluated a number of distance education courses. The paper describes evaluation aspects of distance learning environment and proposes the following criteria useful for this task: knowledge completeness, consistency and adequacy. Apart from knowledge passing, we have to deliver courses in an attractive form. We propose guidelines useful for evaluation of courses prepared in the LearningSpace (Lotus Notes application) environment s. The quality of education can be greatly improved by following these guidelines Two of the courses designed for MBA studies: "Business Plan Preparation” and " Management Decision Support Systems" illustrate the usability of the course evaluation method.

scholarly journals Study on Dynamic Evaluation Method of Stability of Slope Controlled by Structural Plane Based on Deformation Characteristics

2021 ◽  
Vol 283 ◽  
pp. 01047
Author(s):  
Qun Luo ◽  
Tianlong Zhao
Keyword(s):  
High Speed ◽  
Evaluation Method ◽  
Deformation Characteristics ◽  
High Speed Railway ◽  
Structural Plane ◽  
Dynamic Evaluation ◽  
Stability Of Slope ◽  
Measured Displacement ◽  
The Stability ◽  
Good Agreement

The study on deformation characteristics of structural plane is the research foundation of structural plane mechanics and hydraulics. In this paper, a calculation method for dynamic evaluation of the stability of slope controlled by structural plane based on deformation characteristics was proposed on the basis of shear reinforcement three-fold line constitutive model, and it was applied to the example of Raytheon landslide in Chongqing-Guizhou high-speed railway. By comparison, the calculated results were in good agreement with the measured displacement results, and the displacement development process of the dangerous rock mass can be well simulated, thus verifying the feasibility and engineering practicality of the method.

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