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Copyright of China Brewing is the property of China Brewing 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 Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies 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 Engineering Management & Technology Discussion is the property of Omniscient Pte. 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.)

BACKGROUND: The course of infectious bone nonunion is often difficult to heal and has a high risk of recurrence, which brings great trouble to patients’ lives. With the continuous research on the induced membrane technique, the advantages of the treatment of infectious nonunion with the induced membrane technique have gradually emerged and become a new research direction of medical work. OBJECTIVE: To explore the action mechanism of induced membrane technology in the treatment of infectious nonunion. METHODS: The relevant domestic and foreign literatures from 2013 to 2019 of PubMed, MEDLINE, Wanfang, CNKI, VIP, and Ubiquitous Chinese Biomedical Literature Database were retrieved. The key words were “induced membrane technique, infectious nonunion, induced membrane, growth factor” in Chinese and English. RESULTS AND CONCLUSION: The biological structure and function of the induced membrane are similar to that of the periosteum. It can induce the formation of osteoblasts and promote the growth of bone tissue. The induced membrane can secrete many kinds of growth factors, such as vascular endothelial growth factor, bone morphogenetic protein 2 and transforming growth factor β1. The application of induced membrane technology in clinic, especially in the field of fracture, has achieved remarkable results, which provides a new choice for the treatment of infectious nonunion. Exploring the most suitable stuffing material and bone grafting time and the dynamic ratio of the two have become the breakthrough point and challenge of this technology. [ABSTRACT FROM AUTHOR]

Copyright of Laser Technology is the property of Gai Kan Bian Wei Hui 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.)

Face recognition has a wide range of applications, but it is vulnerable to spoofing attacks that affect security. How to design a method with high detection accuracy, strong generalization ability, and satisfying real-time requirements is the focus of current research. This paper divided the existing methods of face anti-spoofing into methods based on hand-crafted descriptor, deep learning and fusion strategy, and introduced the basic ideas, implementation steps and advantages and disadvantages of typical algorithms. Finally, it collated and explained the published databases of face anti-spoofing, summarized the development trend of face anti-spoofing and the problems that still further needed to be solved, which could provide reference for the future research of face anti-spoofing. [ABSTRACT FROM AUTHOR]

Copyright of Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China 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.)

In order to improve the blocking issue of logistics system in sugarcane harvester, by the methods of simulation analysis and experimental research, the cutter spiral lifting mechanism and the effects of friction coefficient and working parameters on the sugarcane material flow were studied and discussed. The average residence time of sugarcane in the transmission device of the screw conveyor was considered as test index and the virtual prototype simulation model was established by the software ADAMS and Unigraphics. Simulation results indicated that increasing friction coefficient of cutter spiral lifting mechanism could improve the delivery rate of the sugarcane and effectively inhibit the clogging problem. The high-speed photography results of experimental prototype showed that while a tyre rubber with high friction coefficient was used as the covering layer for the cutter spiral lifting mechanism and the cutter speed was about 750 r/min, the retention time of sugarcane was shortened by 17% compared to original rebar spiral lifting mechanism. This characteristic could improve the congestion problem of logistics system, and verify that the friction coefficient was exactly the main affecting factor. Based on this principle, this paper worked out the structure improvement of the cutter spiral lifting mechanism. The helical circular cross section was changed into a helical rectangular cross section, which made the contact way of the cutter spiral lifting mechanism and sugarcane change from point contact originally to line contact. The computer simulation experiments under different structures’ transmission speed, displacement, force and so on were conducted, and the analysis indicated that for the 20 mm cutter spiral lifting mechanism that was improved, the sugarcane residence time was shortened by 32% comparing with the original cylindrical spiral. Meanwhile, after the sugarcane head entered the spirals, the loading time from the spiral to the sugarcane head relatively decreased and the time of the loading process was shorter, and the universal impact force for the sugarcane was bigger, which made the cane’s feeding into the system more easily and rapidly. Before the sugarcane tail left the spiral, the favorable impact from spiral still existed, its impulse changed by 11.1 N·s, and the backward displacement of the sugar cane increased. And in the comparison of different width of spiral plane, the spiral retention time of sugarcane decreased by 18.5% when the plane width increased from 12 to 20 mm. If the width of spiral plane continued to increase to 24 mm, the trapped time of sugarcane increased by 17.6% compared to 20 mm width. When sugarcane tail left the spiral, the spiral with 12 and 24 mm width would have an adverse impact on sugarcane, which was unfavorable to the sugarcane conveying, while the spiral with 16 and 20 mm width would not only make the time of cane heading into the spiral shorter, but also produce more favorable impact when sugarcane tail left the spiral. Consequently, the experimental results showed that it could increase the friction conveying force and reduce the sugarcane retention time by appropriately widening the cutter spiral lifting mechanism width. It was advantageous to improve the transportation performance of sugarcane. Compared with 16 mm wide spiral, 20 mm wide spiral offered the equivalent total impulse after the sugarcane head entered the spiral. That made it easier for the sugarcane to enter the feeding roller, and before the sugarcane’s tail left the spiral, the loading time from the spiral to the sugarcane’s tail was more concentrated, the impact force was more balanced, and the backward transmission of the sugarcane was faster and more stable, which could effectively restrain the blocking problem of the front end of conveying system. The results provide the design basis for the construction of the late test platform and the development of the physical prototype. [ABSTRACT FROM AUTHOR]