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The oscillating buoy wave energy converter is a kind of core working unit of wave energy power generation system, and its development is of significances for breaking the power supply bottlenecks in coastal area development and offshore platform construction of in China. Then the coupled motion model for multi-DOF wave energy conversion structures was built to investigate its mechanical configuration, parameter design and energy capture mechanism. Through optimization of the intelligent algorithms such as the particle swarm algorithm, the problems of the too large multi-DOF iteration scale and the local optimal solution dilemma were overcome, the functions of the algorithm were enriched, and the oscillation and energy capture effects of the wave energy converter based on 2D/4D, linear/nonlinear damping and structure dimension parameters in 2 scenarios, were qualitatively and quantitatively evaluated. The capture energy advantages of vibration control conditions of multi-DOF and nonlinear damping, were verified, and the dynamic behavior law, the parameter optimization design and the efficient path of energy capture mechanism were explored simultaneously. Random loads were introduced to optimize the accuracy of the model, and the effects of noise differences on the energy capture were refined. The work provides a new idea for the effective application mode of wave energy conversion structure in practical engineering. [ABSTRACT FROM AUTHOR]

During the Jiaqing and Daoguang's era of Qing Dynasty, pirate and British army attacked the Coastal Defense of Guangdong. Although the Qing court quelled the pirate rebellion, Guangdong Navy did not perform well on the battlefield. The British army defeated the Qing army in the Opium War and conquered the Humen Fortress.The highly centralized system of Qing government restricted the development of Guangdong's coastal defense. Qing Dynasty was a national regime, which established by ethnic minorities and paid much attention to Han people and localities. Qing government has designed the system of garrison, local officials, and the finances thoughtfully. This article will explore how did the system restrict the development of Guangdong's coastal defense during the era of Jiaqing and Daoguang. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This research targets a total of 3 704 tourism resource data from 1 prefecture and 10 counties in the Seto Inland Sea region, clarifies the classification and basis of tourism resources in the Seto Inland Sea region, and uses nearest neighbor index and kernel density estimation methods to analyze the spatial distribution pattern of tourism resources, further summarizing and condensing the tourism development model and experience in the Seto Inland Sea region. Research suggests that the typical tourism resources in the Seto Inland Sea region include five categories: natural scenery, festivals, hot springs, art and culture, and religion. Each type of resource has obvious clustering characteristics in space. The overall tourism resources exhibit a pattern of "one pole with multiple points" and are concentrated and distributed along the coastline; Natural tourism resources are concentrated on the west and south coasts of the Seto Inland Sea, as well as the core area of the central archipelago, forming a "three center" pattern; The cultural tourism resources are concentrated in the economically developed urban areas on the north coast of the Seto Inland Sea, presenting a "two poles, one belt, and multiple centers" pattern. Festivals, arts, and cultural tourism resources have similar spatial distribution characteristics and are clustered in a belt shape along the coastline. Hot springs and religious tourism resources exhibit significant point-like clustering characteristics. The tourism development model in the Seto Inland Sea region has certain experiential and enlightening effects on the development of the tourism economy in China's coastal and island areas. Among them, the cultural and tourism model of "Art Island", the branding of characteristic tourism destinations and tourism destinations, and the ecological tourism and sustainable development model are particularly prominent. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Remote Sensing is the property of Editorial Office of Journal of Remote Sensing & Science Publishing Co. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tourism Tribune / Lvyou Xuekan is the property of Tourism Institute of Beijing Union University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

South Africa is an important partner of China's cooperation with Africa in the "Belt and Road" Initiative. Analyzing the sustainable development of South African coastal areas will provide a reference for high-quality cooperation between China and South Africa. Combining remote sensing data and statistical data, a sustainable development assessment index system was constructed based on the pressure-state-response (PSR) model to analysis the level of sustainable development and differences in the coastal areas of South Africa from 2002 to 2018. The research results show that: (1) The pressure, status, and response factors of various regions increased from 2002 to 2018, the pressure index values of KwaZulu-Natal and Western Cape provinces were higher than those of other regions; the state index values of each region remained relatively stable and increase, and the Namakwa District was obviously different from other regions, less than half of other provinces; among the response index values, the Namakwa District and Western Cape province had improved rapidly, and the regional gap has gradually narrowed. (2) The level of sustainable development in South Africa coastal areas increased from 0. 460 to 0. 529 from 2002 to 2018. The regional difference in the level of sustainable development continued to shrink, Eastern Cape and KwaZulu-Natal province ranked high by the comprehensive sustainable development index, and the sustainable development of coastal regions were constantly improving. The coastal areas of South Africa had enormous potential for sustainable development, and Eastern Cape and KwaZulu-Natal province may be the ideal areas for China-South Africa cooperation in the "Belt and Road". [ABSTRACT FROM AUTHOR]

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Zhejiang University (Science Edition) is the property of Journal of Zhejiang University (Science Edition) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tourism Tribune / Lvyou Xuekan is the property of Tourism Institute of Beijing Union University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrogeology & Engineering Geology / Shuiwendizhi Gongchengdizhi is the property of Hydrogeology & Engineering Geology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Monitoring the dynamic changes of coastline is of great significance to the protection and development of coastal zone. Combined with multi-source synthetic aperture radar (SAR) satellite images and optical satellite remote sensing images, using rule-based object-oriented information extraction, combined with artificial visual correction, the coastline length and water area change information of Jiaozhou Bay are extracted every five years from 2000 to 2018. The results show that the coastline length of Jiaozhou Bay has increased by 43.5 km and the area of Jiaozhou Bay has shrunk by 24.9 km2 in the past 20 years. The coastline changes are mainly influenced by artificial factors such as offshore aquaculture activities, port construction, and natural factors such as river sediment accumulation and tidal action. From the point of view of three key areas, human factors have led to the change of coastline and the shrinkage of sea area in Jiaozhou Bay. The shoreline changes in three key areas of Jiaozhou Bay, namely, Red Island on the north coast, Yellow Island on the west coast and Qingdao on the east coast, show that the shoreline changes in Jiaozhou Bay are mainly influenced by human factors. [ABSTRACT FROM AUTHOR]

Evaluate the policy effect of the Belt and Road strategy on the economic development of coastal cities and the development of the port and city objectively is a great significance to its implement and improvement as well as the coordinated development of the regional economy and the port-city. We first quantify the port location quotient, radiation intensity and port-city synergy of the eight coastal node regions in China, in order to represent the development level of ports in the node area. On this basis, we use the DID model to evaluate the comprehensive policy effects of the "Belt and Road" strategy on the economic development and the development of the port-city in coastal areas. In order to overcome the problems of endogeneity and common trend assumptions, we further use the PSM-DID method to test the robustness of the DID model conclusions, and eliminate the influence of other factors to observe the net effect of the "Belt and Road". It is found that urbanization construction is currently a short-board for coastal areas to achieve rapid development with the opportunity of the "Belt and Road"; Although the "Belt and Road" strategy has played a significant role in promoting the economic development of coastal nodes, after eliminating other factors such as common trends and shocks, the net impact of the "Belt and Road" strategy on the economic development of coastal nodes is negative. The coordinated development of ports and port-cities in coastal node areas lags behind non-node areas both in terms of comprehensive impact and in the absence of other influences. Therefore, coastal node regions should be guided by the scientific development concept. Improve the port cooperation system, increase the sense of competition among port enterprises, expand the scope of port radiation, accelerate the construction of port information, and enhance the support role of the port for new urbanization. At the same time, the new urbanization development and port logistics development should be jointly planned. Actively adjust port and city development to adapt and better participate in the "Belt and Road" strategy. [ABSTRACT FROM AUTHOR]

Copyright of Telecommunication Engineering is the property of Telecommunication Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrographic Surveying & Charting / Haiyang Cehui is the property of Hydrographic Surveying & Charting Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Studying changes in the sedimentary environment of coastal waters region is an important part of marine sedimentary research. Sedimentary environment research of coastal waters in China over nearly 20 years is analyzed. This research mainly addresses Bohai Bay-Yellow River Estuary, Yangtze River Estuary-Hangzhou Bay, the Taiwan Strait, the Pearl River Estuary, and the East China and South China Seas. Recent studies have identified four sedimentary types of the Bohai Bay, four stages of the Yellow River Delta, eight sedimentary environments of the Yangtze River Estuary-Hangzhou Bay, three sedimentary environments in the Taiwan Strait, two cycles in the Pearl River Estuary, three different ecological environments in the South China Sea, and four types of sedimentary areas in the northern part of the South China Sea. Four suggestions are proposed: (1) concentrate on the entire coastal waters environment changes of China in the future, (2) strengthen the dynamic observation of modern sedimentary environment change, (3) conduct an in-depth study of the relationship between sedimentary dynamic processes and the environment, and (4) pay more attention to interdisciplinary comparative studies and other geological records. [ABSTRACT FROM AUTHOR]

Through the analysis of the development activities and the ecological environment in coastal of Hebei Province, China, an index system for evaluating the ecological environment effect, composed of 28 indices, was set up by the pressure, state and response subsystems. Using the comprehensive index evaluation method, the integrated effects of ecological environment index (EI) was calculated and its grading criterion was founded. The results showed that the ecological environment effect of Hebei Province coastal development varied from being relatively small, normal and then relatively large from 1984 to 2010, and its acceptance degree evolved from being acceptable to being unacceptable. Because the resource and environment pressures caused by coastal development were serious and a delay existed in the state relative to the response, the improvement of various measures in the response subsystem did not show a positive effect on the state, and the environmental quality of ocean showed a degrading trend. Due to the differences in coastal development pattern and strength, the ecological environment effect of development activities showed some spatial differences. The ecological environment effect of Qinhuangdao coastal development was the minimum, followed by Cangzhou and Tangshan. Cangzhou and Tangshan had reached unacceptable levels and needed to further strengthen the restoration and protection of ecological environment. [ABSTRACT FROM AUTHOR]