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With the changes in tuna supply and demand pattern, trade policy, resource endowment and other factors in the world, the tuna trade relationship is undergoing a period of diversification. Understanding the characteristics of the global tuna trade network and the changes in China's tuna trade pattern is important for China to optimize its tuna trade policies. In this study, the trade networks of fresh or chilled and elaborate tuna are researched using the complex network analysis method. Changes in the global tuna trade network pattern and the characteristics of China's tuna trade network are investigated. In addition, the Hubness measures index （HMI） is employed to measure the degree of China's reliance on its principal tuna export trading markets. Results are as follows: （1） From 2002 to 2020, the global fresh or chilled tuna trade network density increased from 0.027 to 0.030. The United States, Japan, and Spain had comparatively high betweenness centrality, whereas China's node degree, betweenness centrality, and strength were all small. （2） The network density of elaborate tuna trade increased from 0.049 to 0.063. Thailand's betweenness centrality ranked first in the world. China's node degree, betweenness centrality and strength all increased significantly, but its betweenness centrality ranked relatively low. （3） With the exception of a few countries （regions）, the HMI of China's primary tuna export markets are all low and generally declining. Thailand is China's greatest export market for tuna, but the average proportion of Chinese-origin tuna in Thailand's total tuna imports is only 6.9%. Conclusions are as follows: （1） The density of world tuna trade network is low with an overall rising trend. In trading network for fresh or chilled tuna, the United States, Japan and a few European countries maintain prominent positions and exert considerable influence over the industry. In the elaborate tuna trade network, Thailand is the most influential country; （2） The pattern of China's tuna trade network has changed significantly, and its status is progressively rising; however, its overall influence does not correspond to the ranking of trade scale; （3） China still has great potential for trade collaboration with major tuna import markets. [ABSTRACT FROM AUTHOR]

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis 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 Acta Edulis Fungi is the property of Acta Edulis Fungi 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 Acta Edulis Fungi is the property of Acta Edulis Fungi 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 Isotopes is the property of Journal of Isotopes 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.)

To solve some problems in the finite element analysis with specified conditions for stresses or internal forces, the inelastic strain as an additional unknown to meet the specified stress condition was introduced. The elastic mechanics governing equations meeting the specified stress conditions were described under the small deformation assumption. The potential variational principle and the virtual work equation were established with the displacements and unknown inelastic strains as independent variables. Then a generalized variational principle with 4 types of independent variables of the displacement, the elastic strain, the unknown inelastic strain and the stress, was presented. Based on the variational principle, the specified axial forces and the required adjustment quantities were arranged in a dual form in the equations for truss and beam elements. The ordinary stress analysis was realized under the condition with known adjustment quantities, and the required adjustment quantities were obtained with specified axial force conditions. The effects of material stiffness and internal force of a structure were considered in the new method with the pre stressing reinforcement simulation improved based on the equivalent load method or the real physical reinforcement method. The method applies to the optimization and adjustment of cable forces in related structures. Numerical simulations of displacement optimization and cable tension adjustment for a cablestayed structure demonstrate the feasibility and accuracy of the presented theory and algorithm. [ABSTRACT FROM AUTHOR]

Copyright of Acta Edulis Fungi is the property of Acta Edulis Fungi 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 Beijing University of Technology is the property of Journal of Beijing University of Technology, Editorial Department 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 Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences 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.)

目的分析研究甲状腺功能亢进症（甲亢）患者的心理特点及护理对策。方法收集2015年6月至2016年12月该院诊治的100例甲亢患者，将其随机分为试验组和对照组，各50例。对照组患者采用常规护理方法，试验组在对照组护理方法基础上增加心理、饮食和用药等护理方式。结果试验组住院时间[（3.5±1.9）d]与对照组住院时间[（6.1±2.7）d]比较，差异有统计学意义（P<0.01）；试验组护理评分[（89.7±11.6）分]与对照组护理评分[（68.1±5.9）分]相比较，评分较高，差异有统计学意义（P<0.01）；试验组满意度评分[（96.3±3.9）分]与对照组满意度评分[（71.4±2.5）分]比较，差异有统计学意义（P<0.01）。结论在治疗甲亢患者时，应对心理状况多加重视，结合优质的护理服务，能够提高患者治疗效果。 [ABSTRACT FROM AUTHOR]