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Copyright of Arid Land Geography is the property of Chinese Academy of Sciences, Xinjiang Institute of Ecology & Geography 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.)

The basin ecological compensation can effectively solve the externality issues generated in the process of resources development and utilization, and it is of great significance in promoting the coordinated development of economy-society-ecology in the basin. Based on the evolutionary game theory, this paper analyzed the tripartite dynamic evolution scenarios of the higher government and the upper and lower local governments. Taking the Bosten Lake basin in Xinjiang as the research object, it set up a basin ecological compensation mechanism. The results indicate that only when the fines imposed by the higher government on the defaulting party are higher than the ecological protection costs and compensation fees in the upstream and downstream of the basin, the upstream and downstream can reach a stable equilibrium state of "protection" and "compensation" strategies. Based on the evolution results, the ecological compensation and ecological protection cost of Bosten Lake are 2.64×107 and 2.20×107 Yuan/year. Adopting the "compensation method for key pollution factors exceeding the standard" to determine penalty standards. The penalty standards based on exceeding the standard for CODM, NH3-N and TP pollutants are 1 312.51, 9 181.56 and 13 115.08 Yuan/t respectively. [ABSTRACT FROM AUTHOR]

Studying the underwater behavioral characteristics of shrimp is important for shrimp farming. In order to achieve efficient, rapid and accurate shrimp identification and behavior observation, a detection and behavior analysis method of Penaeus vannamei in aquaculture ponds based on active identification sonar (DIDSON) is proposed. Eight observation points were set up in the shrimp pond, each with a distance of 40 m between them, and the two banks were symmetrically distributed. Since the traditional way of setting up brackets for fixedpoint observation will consume a lot of manpower and material resources, a set of DIDSON sonar observation system based on intelligent double-hull unmanned boats is designed, that is, the use of unmanned ships to carry active identification sonar (DIDSON) can realize continuous fixed-point observation of 8 observation points in a short period of time ( observation time of each observation point is 3 min, interval time is 7 min). In this experiment, a shrimp identification and counting model was constructed based on the underwater acoustic data processing software ECHOVIEW, and the image data collected were identified and extracted, and the preliminary behavioral characteristics of Penaeus vannamei in the aquaculture pond were obtained by target recognition, target extraction, flux analysis and cruise direction analysis. The extreme values of the number of shrimps observed in the eight observation points were 251 and 208, respectively, and the average value was 234, indicating that the distribution of Penaeus vannamei shrimp in the breeding pond was relatively uniform. The flux interval of shrimp swarm per unit time was [108, 131] / (min·m 2 ), the mean value was 122 / (min· m 2 ), the standard deviation was 6 / ( min·m 2 ), and the flux change was small. The proportion of positive swimming ponds of shrimp groups at different points was greater than 85%, and the highest could reach 92. 57%. The results show that this method can observe the regular swimming behavior of shrimp groups in aquaculture ponds, which effectively solves the problem of observation of shrimp groups in aquaculture ponds compared with traditional underwater visual observation and passive sonar investigation, and provides scientific data support for the formulation of more efficient shrimp pond feeding and management schemes. [ABSTRACT FROM AUTHOR]

Copyright of Taiwan Agricultural Research is the property of Taiwan Agricultural Research 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 Fishery Modernization is the property of Fishery Modernization 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 China Population Resources & Environment is the property of Shandong Normal 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 Telecommunications Science is the property of Beijing Xintong Media Co., Ltd. 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 Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press 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.)