Search

In the marine environment, the use of sonar equipment is very extensive. The widespread application of sonar equipment in military and civilian fields has promoted the rapid development of sonar technology, and the sonar system is gradually developing toward multi-bases and large-scale direction. The analyzing and processing of ocean sonar signals has become an important part of sonar system design. Based on the environmental conditions of the Zhanjiang sea area in Guangdong Province, this paper designs the ocean sonar signal waveforms, analyzes the sonar signals with appropriate methods, and constructs an ocean sonar signal processing platform. The research results show that in the marine environment, multi-base sonar system can realize continuous transmitting of sonar signals and receive echoes to achieve continuous detection of targets. Continuous sonar signals have a lower signal-to-noise ratio (SNR) than pulse sonar signals, but continuous sonar signals have a longer time bandwidth product (TBP), which reduces the negative impact of the ocean environment. The Gold-sequence phase modulated (PM) signals have strong reliability and good concealment performance. The signals can occupy the entire bandwidth. The signal processing is not limited by the number of transmitting stations, but its signal forms are more complicated, the signal analysis is cumbersome, and the processing platform is highly demanded. The research in this paper provides a theoretical basis for ocean sonar signal analyzing and processing. [ABSTRACT FROM AUTHOR]

As China’s tourism industry enters a new era of the happiness industry, tourism livelihood efficiency has become an important basis for testing the development effect of tourism. Based on the perspective of the happiness industry, this paper takes Guangdong Province as an example to evaluate tourism livelihood efficiency in coastal areas. The DEA model and Malmquist model are used to measure tourism livelihood efficiency with the spatial and temporal evolution of 21 cities in Guangdong Province from 2010 to 2017. The results show that the tourism livelihood efficiency of Guangdong Province has reached a good state overall and that tourism development has entered a stage of intensive growth. The evolution of regional tourism efficiency has obvious regional characteristics, with the regional tourism efficiency of the Pearl River Delta being larger than that of eastern Guangdong, the mountainous area and western Guangdong. Based on the status of tourism livelihood efficiency over the years, cities are divided into four types: the strong type, growth type, steady type and stagnation type. Corresponding strategies are proposed based on the characteristics of different regional types. [ABSTRACT FROM AUTHOR]

Dai, X. and Zhuang, D., 2019. Geographic planning and design of marine island ecological landscape based on genetic algorithm. In: Guido-Aldana, P.A. and Mulahasan, S. (eds.), Advances in Water Resources and Exploration. Journal of Coastal Research, Special Issue No. 93, pp. 524–529. Coconut Creek (Florida), ISSN 0749-0208. Geographical remote sensing imaging technology is used to image the ecological landscape of marine islands, and remote sensing image data of ecological landscape features of marine islands are extracted. In view of the multi-spectral remote sensing data of multi-spectral remote sensing data based on mathematical morphology segmentation method, the extraction of ecological landscape geographic information of marine islands is easy to produce pseudo-edges and miss detection. This paper presents a design method of marine island ecological landscape geography planning based on genetic algorithm based on remote sensing data of marine island ecological landscape. Firstly, geographical remote sensing imaging technology is used to collect remote sensing data of marine island ecological landscape, and image fusion filtering and block matching are carried out for the collected remote sensing image of marine island ecological landscape. Taking the extracted boundary features of marine island ecological landscape as the center moment, the affine invariant moment of remote sensing image of marine island ecological landscape is obtained. Combining with genetic algorithm, the extraction and optimization of marine island ecological landscape geographic information is realized. Taking NanSan Island in Guangdong as an example, the simulation of marine island ecological landscape geographic planning and design is carried out. The results show that the marine island ecological landscape geographic planning and design is reasonable and accurate information detection efficiency is high. The regional planning capacity for islands is better. [ABSTRACT FROM AUTHOR]

Geographical remote sensing imaging technology is used to image the ecological landscape of marine islands, and remote sensing image data of ecological landscape features of marine islands are extracted. In view of the multi-spectral remote sensing data of multi-spectral remote sensing data based on mathematical morphology segmentation method, the extraction of ecological landscape geographic information of marine islands is easy to produce pseudo-edges and miss detection. This paper presents a design method of marine island ecological landscape geography planning based on genetic algorithm based on remote sensing data of marine island ecological landscape. Firstly, geographical remote sensing imaging technology is used to collect remote sensing data of marine island ecological landscape, and image fusion filtering and block matching are carried out for the collected remote sensing image of marine island ecological landscape. Taking the extracted boundary features of marine island ecological landscape as the center moment, the affine invariant moment of remote sensing image of marine island ecological landscape is obtained. Combining with genetic algorithm, the extraction and optimization of marine island ecological landscape geographic information is realized. Taking NanSan Island in Guangdong as an example, the simulation of marine island ecological landscape geographic planning and design is carried out. The results show that the marine island ecological landscape geographic planning and design is reasonable and accurate information detection efficiency is high. The regional planning capacity for islands is better. [ABSTRACT FROM AUTHOR]

Huang, T. and Wang, T., 2019. Research on analyzing and processing methods of ocean sonar signals. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 208–212. Coconut Creek (Florida), ISSN 0749-0208. In the marine environment, the use of sonar equipment is very extensive. The widespread application of sonar equipment in military and civilian fields has promoted the rapid development of sonar technology, and the sonar system is gradually developing toward multi-bases and large-scale direction. The analyzing and processing of ocean sonar signals has become an important part of sonar system design. Based on the environmental conditions of the Zhanjiang sea area in Guangdong Province, this paper designs the ocean sonar signal waveforms, analyzes the sonar signals with appropriate methods, and constructs an ocean sonar signal processing platform. The research results show that in the marine environment, multi-base sonar system can realize continuous transmitting of sonar signals and receive echoes to achieve continuous detection of targets. Continuous sonar signals have a lower signal-to-noise ratio (SNR) than pulse sonar signals, but continuous sonar signals have a longer time bandwidth product (TBP), which reduces the negative impact of the ocean environment. The Gold-sequence phase modulated (PM) signals have strong reliability and good concealment performance. The signals can occupy the entire bandwidth. The signal processing is not limited by the number of transmitting stations, but its signal forms are more complicated, the signal analysis is cumbersome, and the processing platform is highly demanded. The research in this paper provides a theoretical basis for ocean sonar signal analyzing and processing. [ABSTRACT FROM AUTHOR]

Dai, X. and Zhuang, D., 2019. Geographic planning and design of marine island ecological landscape based on genetic algorithm. In: Guido-Aldana, P.A. and Mulahasan, S. (eds.), Advances in Water Resources and Exploration. Journal of Coastal Research, Special Issue No. 93, pp. 524–529. Coconut Creek (Florida), ISSN 0749-0208. Geographical remote sensing imaging technology is used to image the ecological landscape of marine islands, and remote sensing image data of ecological landscape features of marine islands are extracted. In view of the multi-spectral remote sensing data of multi-spectral remote sensing data based on mathematical morphology segmentation method, the extraction of ecological landscape geographic information of marine islands is easy to produce pseudo-edges and miss detection. This paper presents a design method of marine island ecological landscape geography planning based on genetic algorithm based on remote sensing data of marine island ecological landscape. Firstly, geographical remote sensing imaging technology is used to collect remote sensing data of marine island ecological landscape, and image fusion filtering and block matching are carried out for the collected remote sensing image of marine island ecological landscape. Taking the extracted boundary features of marine island ecological landscape as the center moment, the affine invariant moment of remote sensing image of marine island ecological landscape is obtained. Combining with genetic algorithm, the extraction and optimization of marine island ecological landscape geographic information is realized. Taking NanSan Island in Guangdong as an example, the simulation of marine island ecological landscape geographic planning and design is carried out. The results show that the marine island ecological landscape geographic planning and design is reasonable and accurate information detection efficiency is high. The regional planning capacity for islands is better. [ABSTRACT FROM AUTHOR]

Chen, J., 2020. Influence and evaluation of economic carrying capacity in Guangdong Province from the perspective of trans-regional marine ecological environment flow. In: Guido Aldana, P.A. and Kantamaneni, K. (eds.), Advances in Water Resources, Coastal Management, and Marine Science Technology. Journal of Coastal Research, Special Issue No. 104, pp. 682–686. Coconut Creek (Florida), ISSN 0749-0208. In the context of the current industrial era, how to achieve the balance between urban economic development and ecological environment protection is the most important issue. In order to maintain the growth trend of urban economy, it is necessary to evaluate the city's economic carrying capacity scientifically in advance, and on the basis of the current evaluation results, to re-evaluate the trajectory of urban economic carrying capacity development, analyze the real factors that cause changes, and determine the way to enhance the carrying capacity of urban economy accordingly. This paper takes Guangdong Province as an example to carry out research, hoping to help the development of practice. [ABSTRACT FROM AUTHOR]

Wen, M.; Liu, C.; Galina, P.; Tao, C.; Hou, X.; Bai, F., and Zhao, H., 2020. Efficiency analysis of the marine economy in the Guangdong–Hong Kong–Macao Greater Bay Area based on a DEA model. In: Gong, D.; Zhang, M., and Liu, R. (eds.), Advances in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 106, pp. 225–228. Coconut Creek (Florida), ISSN 0749-0208. This paper aims to study the marine economic efficiency based on a data envelopment analysis (DEA) model. The Guangdong–Hong Kong–Macao Greater Bay Area (GBA) was taken as the research object, and an input-output index system was established. The research results show that the GBA is developing rapidly, and the spatial layout of the marine economy continues to optimize. In the established input-output index system, the input indicators include the three aspects of marine resources, human resources, and scientific and technological inputs, while the output indicators include marine economic output and environmental output. The marine economic efficiency of the GBA was not high, and the average efficiency values of all regions were less than 1; the average value of Guangdong's marine economic efficiency was the highest, and that of Hong Kong's was the lowest, indicating that they are in an inefficient state. Finally, countermeasures and suggestions are put forward for improving the marine economic investment and enhancing the efficiency of marine economic development. The research findings provide useful reference for the sustainable development of the marine economy in the GBA and throughout the country. [ABSTRACT FROM AUTHOR]