# Multi-Objective Optimization Study of Annular Fluid Flow Structure in Cordless Core Drilling Tools
## 2 Structural Design and Principles of Hydraulic Lifting Cordless Coring Drilling Tool
### Principles of the Improved NSGA-II Algorithm
(2023) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Study on the flow field and chip removal performance of laser-mechanical drilling bit at the bottom of well based on EDEM-Fluent coupling. _J. Eng. Des._**2023**, _30_, 521-530. * [PERSON] et al. (2017) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] A Fluent-based study of wellbore annulus chip-carrying pattern. _Energy Environ. Prot._**2017**, _39_, 217-222. * [PERSON] (2015) [PERSON] Experimental Study on The Characteristics of Water Hammer on Annular Space in Petroleum Engineering. Ph.D. Thesis, Northeast Petroleum University, Daqing, China, 2015. * [PERSON] (2013) [PERSON] Study on the Application of Diamond Rope Core Drilling Process Technology in Jiulongchuan Well Field. _Energy Environ._**2013**, \(5\), 44-45. * [PERSON] and Diamond drilling with rope core drilling. _Prospect. Eng._**1982**, \(3\), 62-64. * [PERSON] (2009) [PERSON] Coabled methane exploration and coring technology in Baiyangling coal mine, Xiyang, Shanxi. _Prospect. Eng. (Geotech. Drill. Exacm. Eng. )_**2009**, _36_, 25-28. * [PERSON] and [PERSON] (2021) [PERSON]; [PERSON]; [PERSON] A comprehensive review on NSGA-II for multi-objective combinatorial optimization problems. _IEEE Access_**2021**, \(9\), 57757-5791. [CrossRef]
* [PERSON] and [PERSON] (2016) [PERSON]; [PERSON] Multi-criteria website optimisation using NSGA-II. _Int. J. Bus. Inf. Syst._**2016**, _21_, 418-438. [CrossRef]
* [PERSON] et al. (2017) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] A new decomposition-based NSGA-II for many-objective optimization. _IEEE Trans. Syst. Man Cybern. Syst._**2017**, _48_, 1191-1210. [CrossRef]
* [PERSON] and [PERSON] (2013) [PERSON]; [PERSON] Multi-objective optimisation of grinding process parameters using NSGA-II. _Int. J. Metaheuristics_**2013**, \(2\), 123-140. [CrossRef]
* [PERSON] et al. (2011) [PERSON]; [PERSON]; [PERSON] Improved non-dominated sorting genetic algorithm (NSGA)-II in multi-objective optimization studies of wind turbine blades. _Appl. Math. Mech._**2011**, _32_, 739-748. [CrossRef]* (32) [PERSON]; [PERSON]; [PERSON]; [PERSON] Multi-objective feature selection with NSGA-II, Adaptive and Natural Computing Algorithms. In _8 th International Conference, ICANNGA 2007, Warsaw, Poland, 11-14 April 2007, Proceedings, Part I 8;_ Springer: Berlin/Heidelberg, Germany, 2007. * (33) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] A comprehensive survey on NSGA-II for multi-objective optimization and applications. _Artif. Intell. Rev._**2023**, _56_, 15217-15270. [CrossRef]
* (34) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] A multi-objective optimisation method for coking coal allocation with improved NSGA-II. _Manity. Autom._**2024**, _46_, 103-108. * (35) [PERSON] Research on multi-objective optimisation of machinery green manufacturing system based on improved NSGA-II algorithm. _Agric. Mach. Use Maint._**2023**, \(9\), 72-75. * (36) [PERSON]; [PERSON]; [PERSON]; [PERSON] Brief introduction of back propagation (BP) neural network algorithm and its improvement. In _Advances in Computer Science and Information Engineering_; Springer: Berlin/Heidelberg, Germany, 2012; Volume 2. * (37) [PERSON]; [PERSON]; [PERSON]; [PERSON] The improvements of BP neural network learning algorithm. In _WCC 2000-ICSP 2000. 2000 5 th International Conference on Signal Processing Proceedings. 16 th World Computer Congress 2000;_ IEEE: New York, NY, USA, 2000. * (38) [PERSON] Research and application on BP neural network algorithm. In Proceedings of the 2015 International Industrial Informatics and Computer Engineering Conference, Xi'an, China, 10-11 January 2015; Atlantis Press: Dordrecht, The Netherlands, 2015. * (39) [PERSON]; [PERSON]; [PERSON]; [PERSON] Research and application on improved BP neural network algorithm. In Proceedings of the 2010 5 th IEEE Conference on Industrial Electronics and Applications, Taichung, Taiwan, 15-17 June 2010; IEEE: New York, NY, USA, 2010. * (40) [PERSON]; [PERSON]; [PERSON] A new improved BP neural network algorithm.