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1 – 3 of 3Chang Yuan, Xinyu Wu, Donghai Zeng and Baoren Li
To solve the problem that the underwater vehicles is difficult to turn and exit in a small range in the face of complex marine environment such as concave and ring under the…
Abstract
Purpose
To solve the problem that the underwater vehicles is difficult to turn and exit in a small range in the face of complex marine environment such as concave and ring under the limitation of its limitation of its shape and maximum steering angle, this paper aims to propose an improved ant colony algorithm based on trap filling strategy and energy consumption constraint strategy.
Design/methodology/approach
Firstly, on the basis of searching the global path, the disturbed terrain was pre-filled in the complex marine environments. Based on the energy constraint strategy, the ant colony algorithm was improved to make the search path of the underwater vehicle meet the requirements of the lowest energy consumption and the shortest path in the complex obstacle environment.
Findings
The simulation results showed that the modified grid environment diagram effectively reduced the redundancy search and improved the optimization efficiency. Aiming at the problem of “the shortest distance is not the lowest energy consumption” in the traditional path optimization algorithm, the energy consumption level was reduced by 26.41% after increasing the energy consumption constraint, although the path length and the number of inflection points were slightly higher than the shortest path constraint, which was more conducive to the navigation of underwater vehicles.
Originality/value
The method proposed in this paper is not only suitable for trajectory planning of underwater robots but also suitable for trajectory planning of land robots.
Details
Keywords
Village-level archives are the most basic construction unit of rural archives in China, yet the village-level archival work is the most poorly delivered. However, the evolution of…
Abstract
Purpose
Village-level archives are the most basic construction unit of rural archives in China, yet the village-level archival work is the most poorly delivered. However, the evolution of the laws and rules on village-level archival work in recent years signal that Chinese village-level archival work has stepped into a new era. In this context, this article aims to review the detailed history of village-level archival legislation, examine the legislation’ implementation effect and discuss the existing problems with a view to providing improvement measures.
Design/methodology/approach
A historical research method is used to review the legislation’ history, and the analysis involving the implementation effect is mainly based on literature of two kinds, which are investigation reports on sample villages’ archival work carried out by scholars, and summary reports and work schemes on national or local village-level archival work given by the archival management or administrative management departments at various level.
Findings
At first, China only issued non-legal administrative orders toward village-level archival work. Later, some regions issued local rules, and finally the national rules and even Archives Law with relevant provisions were promulgated. However, their implementation faced two fundamental problems; firstly the insufficient endogenous demand for archival work in some villages, and secondly the mechanism problem involving village level archives management. The countermeasures are also discussed building on these two points.
Originality/value
This is the first article to systematically combine a review of the history of Chinese village-level archival legislation and in addition to examine their implementation effect including analyzing the existing problems from the macro level.
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Keywords
Lakshmi Devaraj, Thaarini S., Athish R.R. and Vallimanalan Ashokan
This study aims to provide a comprehensive overview of thin-film temperature sensors (TTS), focusing on the interplay between material properties and fabrication techniques. It…
Abstract
Purpose
This study aims to provide a comprehensive overview of thin-film temperature sensors (TTS), focusing on the interplay between material properties and fabrication techniques. It evaluates the current state of the art, addressing both low- and high-temperature sensors, and explores the potential applications across various fields. The study also identifies challenges and highlights emerging trends that may shape the future of this technology.
Design/methodology/approach
This study systematically examines existing literature on TTS, categorizing the materials and fabrication methods used. The study compares the performance metrics of different materials, addresses the challenges encountered in thin-film sensors and reviews the case studies to identify successful applications. Emerging trends and future directions are also analyzed.
Findings
This study finds that TTS are integral to various advanced technologies, particularly in high-performance and specialized applications. However, their development is constrained by challenges such as limited operational range, material degradation, fabrication complexities and long-term stability. The integration of nanostructured materials and the advancement of wireless, self-powered and multifunctional sensors are poised to drive significant advancements in this field.
Originality/value
This study offers a unique perspective by bridging the gap between material science and application engineering in TTS. By critically analyzing both established and emerging technologies, the study provides valuable insights into the current state of the field and proposes pathways for future innovation in terms of interdisciplinary approaches. The focus on emerging trends and multifunctional applications sets this review apart from existing literature.
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