scholarly journals A mission planning method for multi-satellite wide area observation

2019 ◽  
Vol 16 (6) ◽  
pp. 172988141989071 ◽  
Author(s):  
Hao-ran Ji ◽  
Di Huang
Keyword(s):  
Time Allocation ◽  
Planning Process ◽  
High Reliability ◽  
Satellite Observation ◽  
Planning Method ◽  
Mission Planning ◽  
Wide Area ◽  
Significant Information ◽  
Short Time ◽  
Remaining Time

Space-based Earth observation is now developing rapidly because of the advantages in coverage, convenience, and flexibility. However, it is difficult for one single satellite to realize the quick observation of wide areas. In order to catch all the significant information of a wide area in a short time, multi-satellite observation mission would be proposed. In this article, a mission planning method for online multi-satellite wide area observation is established to serve future multi-satellite observation missions. Firstly, a method for area division is proposed, and the whole area is divided into subareas. Then the multi-satellite observation path planning is realized by a strategy of path deduction. After that, a remaining time allocation method to maximize the observation gazing time of each subarea is proposed. Finally, the algorithms for the whole mission planning process are provided. Numerical simulations show that the mission planning method is able to ensure the complete coverage of different wide target areas, with high reliability and low computational complexity.

scholarly journals Boosting English Competency and Learning Motivation Through the Integrated Approach For Non-English Departments Students

ELT-Lectura ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 1-14
Author(s):  
Samsul Amri ◽  
Syafrizal
Keyword(s):  
Time Allocation ◽  
Integrated Approach ◽  
Learning Motivation ◽  
Affecting Factors ◽  
English Departments ◽  
Data Collection Process ◽  
Improvement Process ◽  
Before And After ◽  
Internal And External Factors ◽  
Short Time

At the tertiary level, English as a General Subject supports the learning process's main course. The observations show they are not yet proficient enough to use it. It causes indisposed motivation, dearth vocabulary, low learning interest, short time allocation, and others. Therefore, the researchers provide a solution by applying the Integrated Approach. The research objectives are to determine whether the Integrated Approach can improve English competency and learning motivation, how the learners’ improvement process, and what factors influence these improvements. It is action research, which was Accounting majoring students as subjects - Islamic University of Indragiri. The data collection process used tests and questionnaires. Furthermore, the results showed an increase in their competence and motivation to learn English before and after the Integrated Approach. The improvement process covers several activities; socializing, analyzing, monitoring, guiding, and practicing. Meanwhile, the development affecting factors are internal and external factors such as learning motivation, teaching methods, and the instructors’ roles. In conclusion, the Integrated Approach application positively contributes to the learners’ learning outcomes and motivation.

scholarly journals Exploring mission planning method for a team of carrier aircraft launching

2019 ◽  
Vol 32 (5) ◽  
pp. 1256-1267 ◽  
Author(s):  
Yu WU ◽  
Yanyang WANG ◽  
Xiangju QU ◽  
Liguo SUN
Keyword(s):  
Planning Method ◽  
Mission Planning

Workpiece Fixture Planning Method for Continuous Multi-Axis Machining with Consideration of Motion on Translational Axis

2012 ◽  
Vol 6 (6) ◽  
pp. 775-780 ◽  
Author(s):  
Jun’ichi Kaneko ◽  
◽  
Kenichiro Horio
Keyword(s):  
Machine Tool ◽  
Maximum Velocity ◽  
Planning Method ◽  
Second Step ◽  
Prototype System ◽  
Machining Time ◽  
Post Process ◽  
Fixture Planning ◽  
Tool Posture ◽  
Short Time

This study deals with a new method to plan fixture conditions of a workpiece on a trunnion table in a continuous multi-axis-controlled machine tool. The motion of the translational axes on the machine tool is usually greatly affected by machine tool structure, tool posture change, and the fixture conditions of the workpiece. However, in a conventional CAM scheme, the fixture conditions are designed to be determined separately. Furthermore, a method of planning these conditions to reduce total machining time has not been proposed. Therefore, this paper proposes a new planning method for workpiece position and posture on a trunnion table. The proposed method consists of two different steps. In the first step, a large number of fixture condition candidates are assumed automatically. In the second step, geometric calculations are executed to estimate the distribution of features in terms of motion on the translation axes. The second step is equivalent to the repetition of coordinate transformations in the conventional post process software. In the developed prototype system, parallel processing technology known as GPGPU is introduced to drastically reduce calculation time. The developed system can visualize differences in total travel distance, maximum velocity, and total machining time for each candidate. These results can assist a CAM operator in selecting the optimal fixture conditions in a short time.

scholarly journals A REVIEW OF EXPERIMENTAL STUDY OF PV SYSTEM AND PEDAL POWER WITH GRID

2020 ◽  
Vol 3 (4) ◽  
pp. 31-34
Author(s):  
Priyanka Verma ◽  
A.K. Sharma
Keyword(s):  
Experimental Study ◽  
Energy Conversion ◽  
High Reliability ◽  
Photovoltaic Effect ◽  
Electrical Energy ◽  
Pv System ◽  
Short Time ◽  
Design And Application

Through the photovoltaic effect the energy contained in the sunlight can be converted directly into electrical energy. This method of energy conversion presents some advantages, such as: Its modular characteristic offers large flexibility in the design and application of this kind of energy generator. Short time of installation and operation. High reliability, and low maintenance.

scholarly journals Quantitative study of activated sludge population structure

2021 ◽  
Vol 2130 (1) ◽  
pp. 012026
Author(s):  
R Babko ◽  
V Pliashechnyk ◽  
T Kuzmina ◽  
J Zaburko ◽  
Y Danko ◽  
...  
Keyword(s):  
Population Structure ◽  
Activated Sludge ◽  
Quantitative Study ◽  
High Reliability ◽  
Small Population ◽  
Glass Slide ◽  
Population Densities ◽  
Treatment Control ◽  
Free Swimming ◽  
Short Time

Abstract A quantitative study of the population structure of activated sludge is an important component of biological wastewater treatment control. However, in the studying of live samples of the activated sludge, some complications arise, in particular, associated with the relatively short time of the subsample suitability. A subsample is the part of the sample that is placed on a glass slide and in which organisms are counted. The issue of optimization of counts of organisms with large amplitude of population density is considered. The results of counting ciliated protozoa in activated sludge were described. The samples were counted in 45 sub-samples of 25 µl each. An average of 10 counts was required to achieve high reliability in determining population densities with more than or equal to 1 specimen per 25 µl in sub-samples. For small population densities (less one specimen per 25 µl) of free-swimming, crawling, and sessile ciliates, 30 counts are necessary. When the density of colonial protozoan populations is established, the number of counts should be increased to 40, especially when colonies with significant differences in the number of zooids are found.

scholarly journals Function Chain-Based Mission Planning Method for Hybrid Combat SoS

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 100453-100466
Author(s):  
Hua He ◽  
Weiping Wang ◽  
Yifan Zhu ◽  
Xiaobo Li ◽  
Tao Wang
Keyword(s):  
Planning Method ◽  
Mission Planning
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