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Based on the ecological niche theory, aiming to establish high-yield wetlands, this study selected ecological factors influencing converting dryland to paddy, constructed an evaluation system for identifying and diagnosing obstacle factors in converting dryland to paddy, and determined their thresholds or optimal values according to the law of limiting factors and tolerance. By combining specific projects, obstacle factors and their severity were diagnosed. The results showed that the identified obstacle factors and proposed reduction measures in dryland to paddy conversion could effectively address the specific issues of “whether, how, and what to construct” for a particular project. This research provides a scientifically feasible approach and theoretical guidance for feasibility studies and planning and design of dryland to paddy conversion projects. It is of great significance in ensuring the successful implementation of converting dryland to paddy. [ABSTRACT FROM AUTHOR]

Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Nanchang University (Natural Science) is the property of Journal of Nanchang University (Natural Science) 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.)

In order to explore the suitable range of single leaf weight for tobacco in the upper part of Zhangjiajie City, taking the main cultivar K326 as the research object, different single leaf weight intervals were set, the relationship between single leaf weight and the main physical characteristics, sensory quality of tobacco was analyzed,the suitable single leaf weight was determined. The results showed that combining the effects of single leaf weight on the physical properties and sensory quality of tobacco leaves,the performance of tobacco leaves with the single leaf weight of 8-10,>10-12,>12-14 g,respectively at Gaofeng test site was better. The upper leaves with the single leaf weight of 8-10 and >10-12 g at Jiangya test site had better quality and higher availability. According to the correlation between leaf length and single leaf weight, the suitable leaf length for Zhangjiajie tobacco area could be obtained,the proportion of upper leaves with the leaf length of 51. 25-67. 82 cm at Gaofeng test site and the proportion of upper leaves with the leaf length of 51. 21-63. 13 cm at Jiangya test site could be used as the technical control targets. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences 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 Science Technology & Engineering is the property of Chinese Society of Technology Economics 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials 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 Urban Mass Transit is the property of Urban Mass Transit 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 Sichuan Mental Health is the property of Sichuan Mental Health Center 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Chemical Engineering (China) / Huaxue Gongcheng is the property of Hualu Engineering Science & Technology 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 Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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.)

Benggang is one of the most severe types of soil erosion in the granite areas of southern China, due to the large erosion, strong explosiveness, and fast development speed. Accurate assessment of susceptibility is of great significance for the prevention and control of Benggang damages. In this study, different combinations of environmental factors and negative sample selection strategies were explored the impact on the assessment of Benggang susceptibility. A case study was taken from the granite area of Xingguo County, Ganzhou City, Jiangxi Province, China. A systematic detection was implemented to determine the explanatory power of 17 environmental factors on the development of Benggang using a GeoDetector (GD). According to the cumulative explanatory power percentage, 56.89%, 78.55%, 92.88%, and 100.00% were selected as the environmental factor combinations, corresponding to 4, 7, 10, and 17 environmental factors, respectively. Single random undersampling (SRU) was used to construct a negative sample dataset equal to positive samples using frequency ratio (FR). The susceptibility was calculated in the study area using automatic landslide susceptibility analysis (ALSA). Negative sample data was selected equal to positive samples in the low and extremely low susceptibility areas. The sample dataset was divided into the training and testing datasets in a 7:3 ratio. The training dataset was used to train the random forest (RF) model, and then the trained RF model was to calculate the testing dataset. The prediction accuracy of the model was evaluated to calculate the Benggang susceptibility using the receiver operating characteristic (ROC). The results show that: 1) The model accuracy under the three negative sample selection strategies decreased first and then increased with the increase of the number of factors. The area under curve (AUC) values of the model considering four environmental factors were 0.729, 0.909, and 0.909, respectively. The model accuracy was the lowest at 7 environmental factors, with the AUC values of 0.711, 0.869, and 0.893, respectively. The AUC values of the 10 environmental factors were 0.745, 0.942, and 0.919, respectively. The model accuracy was highest at 17 environmental factors, while the AUC values were 0.755, 0.947, and 0.929, respectively. There was the nonlinear correlation between model accuracy and cumulative explanatory power percentage. The difference was only 0.020-0.038, although the accuracy of the model for 4 environmental factors was lower than that of 17 environmental factors. Therefore, the relatively ideal accuracy was achieved when considering the main controlling environmental factors; 2) The improved frequency ratio method was significantly improved the accuracy of the model. When the number of environmental factors was 4, the AUC values of FR and ALSA were both 0.909, and the negative samples selected by FR and ALSA were the most reasonable; When the number of environmental factors was 7, the AUC value of ALSA was 0.893, and the negative sample selected by ALSA was the most reasonable; When the environmental factors were 10 and 17, the AUC values of the FR were 0.942 and 0.947, respectively. In summary, the FR can be expected to select the most reasonable negative samples; 3) The acerage rainfall erosivity was closely related to the development of Benggang. Particularly, the acerage rainfall erosivity was ranged from 9 133.24 to 9 981.49 MJ∙mm/(hm²∙h∙a) within the scope of the study area. The majority of high and extremely high susceptibility areas were distributed in the southwest of the study area, whereas, a small number of extremely high susceptibility areas were distributed in the central and eastern parts of Xingguo County, and the majority of extremely low susceptibility areas were distributed in the northern and eastern. This study has explored the impact of different combinations of environmental factors and negative sample selection strategies on the susceptibility assessment of Benggang. The finding can provide the scientific basis for the disaster prevention and reduction in granite areas. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology 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.)

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Copyright of Electronic Communication & Computer Science 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.)

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Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 University of Technology Natural Science Edition is the property of Henan University of Technology Journal 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.)

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Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction 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 Journal of Tea Science is the property of Journal of Tea Science 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.)

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Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering 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.)

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Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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.)