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Copyright of Chinese Journal of Cancer Biotherapy is the property of Editorial Office of Chinese Journal of Cancer Biotherapy 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 Automobile Technology & Material is the property of Automobile Technology & Material 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 Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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.)

At present, the problem of airspace resource shortage caused by the surge of air traffic is becoming more and more prominent. In order to alleviate this situation, the study of aircraft rerouting based on the flow management was carried out. Firstly, the airspace environment was discretized by rasterization, and the airspace was divided into different types of raster regions according to the congestion degree of waypoint flow. Secondly, it was used to model by improving the reward function of Markov decision process in reinforcement learning. Based on the ε-greedy strategy, Q-Learning algorithm was used for iterative solution, and the corresponding parameter value was explored and compared to improve the applicability of the results. Finally, the optimal path and the corresponding performance indexes under different parameter assignments were calculated through simulation. The results show that the model and algorithm can be used to search for an appropriate rerouting path for the congested airspace in a certain period of time, so that the aircraft can avoid the congested waypoints, shorten the delay time in the air, and effectively improve the status of airspace congestion. [ABSTRACT FROM AUTHOR]

In the future, the number of the terminal airspace in China will increase year by year, according to the data, the airspace resources in the terminal area are not proportional to the growth of flight flow, and the flow in the terminal area tends to be saturated. In order to effectively improve the efficiency of terminal area operation, ensure the safe flight of aircraft in its airspace, reduce the load of controllers and the operation cost of the company, a multi airport terminal area Aircraft Arrival collaborative sequencing model was established from three directions: aircraft delay, controller load and resource balance of each airport. Firstly, the interrelated factors of the terminal area system were obtained through the study of the scope of the terminal area, the main problems of operation and the analysis of the airspace structure. Secondly, the corresponding commonalities, high impact operation system correlation factors, relevant constraints and main solution objectives were obtained through the separate analysis of the routes and intersections of aircraft entering the terminal area. Finally, the model was solved by non-dominated sorting genetic algorithm Ⅱ(NSGA-Ⅱ) algorithm combined with simulated annealing algorithm(SAA). The results show that the solution of the model based on the improved genetic algorithm is compared with the first come first serve model and the unmodified genetic algorithm, the efficiency is improved by 26. 3% and 53. 2% respectively. It can be seen that the efficiency of aircraft sequencing can be greatly improved through the proposed model. [ABSTRACT FROM AUTHOR]

Eight South Asian countries and eleven Southeast Asian countries along the "One Belt and One Road" are areas with high incidences of parasitic diseases. Due to the influence of geographical location, economic status, cultural background, and dietary habits, several human parasites such as Plasmodium spp, Leishmania spp, Toxoplasma gondii, Giardia lamblia, Blastocystis hominis, Entamoeba histolytica, Trichomonas vaginalis, schistosoma japonicum, Ascaris lumbricoides, Trichiruss trichiura, hookworm, strongyloides stercoralis, Enterobius vermicularis, tapeworms, and filaria are prevalent. Parasitic diseases are a serious public health problem in these regions. Analyzing the epidemic situation of parasitic diseases in South and Southeast Asian countries along the "One Belt and One Road", and formulating targeted measures of prevention and control are helpful for preventing the occurrence of cross-border infectious diseases, promoting close cooperation between countries, and completely eliminating parasitic diseases. [ABSTRACT FROM AUTHOR]

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power 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.)

Objectives　To explore a better online teaching model for MBBS international students under the impact of COVID-19. Methods　 The “PPT+ voice mode” based on rain classroom and the “live online mode” based on Dingding software were used for online teaching. The advantages and disadvantages of the two modes were evaluated by analyzing students’ attendance rate and test scores. Questionnaire was used to explore students’ acceptance of online teaching. Results　 The attendance rates of the batch 2018 "PPT + voice courseware" group and the batch 2019 "live online mode" group were （ 89.66±5.58） % and （ 95.67±1.94） %, respectively, and the difference was statistically significant （P < 0.001）. The results of knowledge content test were （ 72.49±22.12） and （ 69.94±11.34） respectively, and there was no significant difference between them （ P > 0.05）. The final exam scores were （71.56±7.44） and （88.40±4.95） respectively, and the difference between the two groups was statistically significant （ P < 0.000 1） . The results of the questionnaire survey are that 7.14% of students prefer online teaching. 74.08% students have no preference for online teaching methods. Conclusion Compared with "PPT+ voice mode", "live online mode" based on Dingding software yielded higher attendance rate and better final exam results. [ABSTRACT FROM AUTHOR]

结直肠癌是常见的恶性肿瘤,虽得益于根治性手术及辅助化疗的发展,其预后有所改善,但根治性手术及辅助化 疗后仍有25%~50%的复发率,是导致患者死亡的主要原因。循环肿瘤细胞作为一种无创可重复的检测方式,在结直肠的早期 诊断、肿瘤复发转移的检测、预后的评估、治疗的指导等方面具有巨大的优势。 [ABSTRACT FROM AUTHOR]

Copyright of Journal of Modern Medicine & Health is the property of Journal of Modern Medicine & Health 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 Food Safety & Quality is the property of Journal of Food Safety & Quality 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 Chinese Journal of Lung Cancer is the property of Chinese Journal of Lung Cancer 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 Chinese Journal of Lung Cancer is the property of Chinese Journal of Lung Cancer 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 Modern Medicine & Health is the property of Journal of Modern Medicine & Health 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 Mechanical & Electrical Engineering is the property of Mechanical & Electrical Engineering Magazine 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.)