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Some hydrozoan species are known for their high adaptability and dormancy ability, e.g., Cladonema species, which are also promising model organisms. Since salinity affects the development and distribution of hydrozoan species, it is important to get further understanding of salinity tolerance and dormancy ability of Cladonema species. Cladonema digitatum is a cryptic species and is discovered only in artificial environments. In this study, multiple experiments have been conducted to determine how salinity affects the development of C. digitatum polyps and medusae, to describe the dormancy and recovery of the C. digitatum polyps, and to find the possible prevention and disposal protocol for the occurrence of Cladonema in artificial environments. As results, salinity range of 35–40 ppt was optimal for C. digitatum polyps, while C. digitatum medusae lived best in 30–35 ppt; C. digitatum would form menonts at 15, 50–60 ppt, revive and change their survival strategies after salinity upturned to 35 ppt, which could enhance their tolerance and adaptability. Cladonema digitatum medusae also showed different death rates when faced with sharp hypersaline and hyposaline stress. In summary, this research provided ecological information about salinity range and dormancy ability of C. digitatum, which not only facilitated tracing the wild habitats of the C. digitatum, but also provided the theoretical basic of elimination and prevention of Cladonema species intrusion and breeding conservation in the laboratory. [ABSTRACT FROM AUTHOR]

This document is a retraction note for an article titled "Optimal individualized multimedia tourism route planning based on ant colony algorithms and large data hidden mining." The article has been retracted by the publisher due to concerns about compromised editorial handling and peer review process, inappropriate references, and being outside the scope of the journal. The authors, Xiaohui Qian and Xiaopeng Zhong, have not responded to correspondence regarding the retraction. Springer Nature, the publisher, remains neutral regarding jurisdictional claims and institutional affiliations. [Extracted from the article]

This paper collects the coordinates of longitude and latitude of each city and the actual inter-city train tickets and air tickets aiming at the route optimization of 34 cities in China. Ant colony algorithm is used for heuristic search on the basis of this large amount of data, and a reasonable and optimal travel route is given for practical problems. At the same time, the increment of pheromone was adjusted by positive and negative feedback, and the volatile factors of pheromone were randomized, it enables the ant colony algorithm to automatically adjust the pheromone amount on the path to improve the performance of the ant colony algorithm. Finally, the performance advantages of the proposed algorithm in personalized tourism route planning are verified by simulation experiments. [ABSTRACT FROM AUTHOR]

To compare the 5-year survival rates and complications of internal and external irradiation therapy combined with operation in patients with II-III period of cervical cancer. 162 cervical cancer patients after the whole palace resection pelvic lymphadenectomy were divided into three groups, and then accepted radiotherapy. The first group with 91 cases was accepted internal and external irradiation therapy before operation; the second group with 37 cases was given internal irradiation therapy before operation; the third group with 34 cases was given routine postoperative radiotherapy. External irradiation used 60Co irradiation or a linear accelerator, to the whole basin, and the irradiation dose of “B” point in preoperative radiotherapy was 26–30 Gy, in postoperative radiotherapy was 46–50 Gy; intraluminal brachytherapy used 192Ir, the dose of “A” point was 5–15 Gy. The 5-year survival rate of preoperative combined radiotherapy group was 78.0% (71/91), preoperative intracavitary radiotherapy group 64.9% (24/37), and postoperative radiotherapy group 35.3% (12/34). Comparing the 5-year survival rates of the preoperative combined and postoperative irradiation groups, there was significant difference ( P < 0.05). The major complications were radioactive proctitis and cystitis, the complication incidences of three groups were 35.2% (32/91), 32.4% (12/37), 38.2% (13/34), respectively, and the differences were not statistically significant ( P > 0.05). The intraluminal brachytherapy plus external irradiation can significantly increase the 5-year survival rate of patients with IIa-IIIa stages, and the incidence of complications was not significant difference. [ABSTRACT FROM AUTHOR]