Journal of Intelligent & Fuzzy Systems - Volume 38, issue 2

Authors: Teng, Yingxiang

Article Type: Research Article

Abstract: In this paper, based on the idea of separation modelling, through the analysis of ship motion and force, a mathematical model of ship motion under the action of external wind, waves and current is established in 6 free direction modelling. According to the force analysis of the ship, the calculation model of the 6-degree-of-freedom nude hull hydrodynamics and torque, the 6-DOF fluid dynamics and torque, the 6-DOF external force interference force and the moment, and the thrust and thrust of the pod propeller are established. Computing model. Finally, the computer simulation is carried out, and the fourth-order Runge-Kutta algorithm of …numerical analysis method is used to calculate the 6-degree-of-freedom motion state of the ship. Through the experimental analysis and comparison with the related 6-degree-of-freedom literature, the 6-degree-of-freedom mathematical model designed in this paper is basically fulfil requirements. At the same time, according to the characteristics of ship dynamic positioning, the hybrid intelligent control strategy is used to design an adaptive dynamic positioning controller based on hybrid intelligent control. By testing and analysing the designed dynamic positioning controller, the results show that it responds in time and rises. The time is basically within the controllable range, has a certain ability to resist external environment, has good robustness, and the overshoot rate is relatively low, and the control quality is also good. Show more

Keywords: Ship, six degrees of freedom operation, dynamic positioning control, fourth-order Runge-Kutta algorithm

DOI: 10.3233/JIFS-179493

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1299-1309, 2020

Authors: Gu, Musong | Du, Xiaodan | Fan, Wenjie | Han, Qiyi | He, Zishu | You, Lei

Article Type: Research Article

Abstract:  In emergency, it is very important to make a real-time and precise positioning of emergency address. As a large amount of emergencies take place in mountainous region, river valley and high building, original node location based on plane does not apply any more, thus, in order to improve precision of early warning and location of disaster, we have proposed a 3D-DVHop localization algorithm, and compare it with the typical 3-D location algorithm APIS. Through the simulation experiment, the localization error of the improved 3D-DVHop algorithm is far less than that of APIS algorithm, which improves the localization accuracy greatly under …unexpected circumstances and laying a solid foundation for the following decision-making and rescuing work. Show more

Keywords: Geological disaster warning, 3D-DVHop algorithm, localization problem, wireless sensor network

DOI: 10.3233/JIFS-179494

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1311-1318, 2020

Authors: Mao, Kedun

Article Type: Research Article

Abstract: Patent documents, the paper constructs a patent model tree and establishes a similar patent determination method based on vector space model and patent document features. The paper then proposes to use the patent application number as the association identifier, and associate the ontology and the ontology instance with the existing patent information database, which improves the speed of establishing the ontology and reduces the maintenance and update of the ontology. At the same time, based on the integration of existing workflow management and knowledge flow management, this paper proposes an integration framework with patent knowledge as the core knowledge and …integration link, and describes the nature of knowledge retrieval and the method of importance differentiation. Finally, the paper designs a patent retrieval system, establishes the structural model and functional model of the system and the technical framework of the implementation system. On this basis, the design of the update module of the PMAS system is discussed. Finally, the performance optimization of the PMAS system is designed in detail. Show more

Keywords: Patent management analysis system, workflow, integrated knowledge environment, key technology analysis

DOI: 10.3233/JIFS-179495

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1319-1328, 2020

Authors: Liu, Qingjie | Wang, Xiaoying | Pan, Zhian

Article Type: Research Article

Abstract: In view of the large data volume and complex structure of big data in the operation of major systems, the traditional cloud computing distributed multi-layer architecture data retrieval method has been difficult to meet the needs of big data retrieval. Therefore, related research must be centered around the structure of complex big data is unfolded, especially unstructured big data, to shape a new data cluster infrastructure. The cluster environment needs to implement stable retrieval of unstructured data through a cloud-centric method. The system introduces an unstructured big data retrieval framework as an unstructured database, as a data retrieval engine to …improve the cloud computing big data non-structure retrieval service, and obtain the key code of unstructured big data under the retrieval technology. Finally, the system is applied to the exsperimental system, and an experimental unstructured big data integration system is built to realize the unified retrieval of large-scale different business functions and business data, so as to satisfy the users to quickly retrieve from a large number of heterogeneous business systems and massive data. Claim. Through search engine technology, the use of text mining, natural language processing, information retrieval and other fields of technology to further improve the precision and recall rate of full-text search. The application of this technology can meet the needs of unified retrieval of large-scale different business data; and at the same time meet the rapid response requirements of large-scale data retrieval requests. The experimental results show that the designed system has high precision and low retrieval time in the process of retrieving unstructured big data under cloud computing, which can realize the stable retrieval of unstructured cloud data. Show more

Keywords: Cloud computing, big data, unstructured stability retrieval, data retrieval engine

DOI: 10.3233/JIFS-179496

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1329-1337, 2020

Authors: Chao, Chen | Dawei, Liu | Lijun, Song

Article Type: Research Article

Abstract: In order to solve the problem of effective allocation of spectrum resources and provide an effective spectrum access method for the Internet of Things, a cognitive wireless system based on MCCDMA structure is proposed, and the performance of the system is studied. Two strategies named Underlay and Overlay are proposed and corresponding BER performance are analyzed when the main users are occupying the spectrum. The trend of probability of outage are researched when the number of secondary users are mutative. Theoretical analysis and simulation results show that the cognitive wireless system can use spectrum resources more flexibly and effectively, which …is very suitable for application in IoT systems. Show more

Keywords: Cognitive radio, IoT, MCCDMA, overlay, spectrum hole, underlay

DOI: 10.3233/JIFS-179497

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1339-1347, 2020

Authors: Qi, Zhanfeng | Zhai, Jingsheng | Qin, Yufeng

Article Type: Research Article

Abstract:  This paper takes the wave glider as the research object. The wave glider is studied comprehensively from the aspects of motion mechanism, motion law and hydrodynamic performance. Firstly, based on the turbulence model of RANS equation, dynamic mesh method, the hydrodynamic performance of two-dimensional tandem hydrofoils is analyzed, which has been developed twice. The paper puts forward the a obstacle avoidance algorithm of wave glider based on fuzzy control. Combining the principle of line-of-sight navigation with the idea of fuzzy control, the path planning of wave glider is carried out. The simulation and experimental results show that the algorithm can …provide real-time and stable motion path of the wave glider, effectively avoid obstacles and safely reach the target point. Show more

Keywords: Wave glider, dynamic analysis, fuzzy control, modelling, obstacle avoidance

DOI: 10.3233/JIFS-179498

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1349-1358, 2020

Authors: Si, Haiping | Sun, Changxia | Qiao, Hongbo | Li, Yanling

Article Type: Research Article

Abstract: At this stage, with the continuous development of data acquisition technology, the mining of high-dimensional spatial data has become a hot issue. And so on. The spatial data mining component studied in this paper is part of the spatiotemporal data middleware. The main research result is to propose a density-based and grid-based extended adjacent spatial clustering method and apply this method to the space for agricultural informatition. In data mining, we also used the middleware technology to complete the agricultural geographic information system based on MapXtreme, and applied the spatial data mining for agricultural informatization to develop the middleware of …agricultural variety division, which solved the agricultural informatization. The practical application is of our country. Show more

Keywords: Data mining, WebGIS, agricultural informatization, middleware, multidimensional space

DOI: 10.3233/JIFS-179499

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1359-1369, 2020

Authors: Changcheng, Xin | Chaohu, He

Article Type: Research Article

Abstract:  The development of this system is based on ASP technology, and through the application of B/S structure and SQL Server database, it provides necessary scientific research data support for the sharing of scientific research information in colleges and universities, and basically realizes the management of personnel files, personnel management and professional title. Management integration of scientific research projects and management of information systems. Develop a research goal of web-based network research management information system. Through this system, it can manage and standardize more scientific research projects. The system is a complete set of college plans, declarations, contracts, Research management information …systems for results, patents, funds, personnel, equipment, etc. The system is based on the B/S mode, perfecting the output system of the report, and providing corresponding data support for the smooth development of scientific research projects, providing a solid material foundation and software hardware for the research and management of scientific research projects. Support, providing an electronic data platform for scientific research and academic exchanges, successfully achieved design tasks and goals. Show more

Keywords: University scientific research patent management, BS mode, ASP technology, SQL server database, information system design

DOI: 10.3233/JIFS-179500

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1371-1379, 2020

Authors: Yu, Kang | Qiang, Wu

Article Type: Research Article

Abstract: In order to better solve the problem of gas outburst prediction, based on the in-depth study of ant colony algorithm, the ant colony clustering algorithm is improved, and the population classification and ant sensory perception characteristics are applied to make the ant colony the most likely to find. The optimal solution effectively avoids the possibility of local optimization, improves the global optimization performance and convergence speed of the algorithm, and reduces the influence of human subjective factors. Based on the prominent basic speech and actual working conditions, the paper selects five indexes of gas velocity, initial gas velocity, gas content, …gas pressure and coal firmness coefficient as clustering attributes, and uses ant colony clustering algorithm to judge outstanding the state of occurrence. The paper uses MATLAB programming language to write a coal and gas outburst prediction program based on improved ant colony clustering algorithm, and predicts a coal mine. The final result is the same as the actual observation. Show more

Keywords: Coal and gas outburst, prediction, ant colony clustering algorithm, K-means algorithm

DOI: 10.3233/JIFS-179501

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1381-1390, 2020

Authors: Sun, Haiyong | Lei, Hang

Article Type: Research Article

Abstract: A task scheduler plays an important role in Embedded Operating Systems (EOS). In order to ensure the scheduling properties of an EOS, it is important to verify the implementation of its task scheduler. However, the implementation of a task scheduler requires the manipulation of machine registers directly and uses very complex C pointer structures to manage the task related data. Thus, we need a verification system that can formally describe both C pointer programs and embedded code pointers (e.g., update the stack register) naturally. Based on the Verified Software Toolchain and the CompCert ARM assembly syntax and semantics, we utilize …the Coq proof assistant to develop formal reasoning support for the verification of a low-level task scheduler. Our verification system has the capability to verify both C and ARM assembly language; it supports the separation of logical abstractions and specific implementations. More importantly, all the verification can be done in a unified modular verification framework, which minimizes semantic gaps at specification interfaces. Show more

Keywords: Task scheduler, program verification, embedded operating system, formal methods

DOI: 10.3233/JIFS-179502

Citation: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 2, pp. 1391-1399, 2020