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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 Chinese Journal of Preventive Veterinary Medicine / Zhongguo Yufang Shouyi Xuebao is the property of Chinese Journal of Preventive Veterinary Medicine 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 Metal Working (1674-165X) is the property of Metal Working 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 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 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 Journal of Nanjing Agricultural University / Nanjuing Nongye Daxue Xuebao is the property of Journal of Nanjing Agricultural University 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.)

Machine reading comprehension is one of the research hotspots in the field of natural language processing, it is of great significance to improve the reading ability and intelligence level of the machine. In order to follow up the research progress in related fields, this paper reviewed it. Firstly, this paper introduced the development process and main tasks of machine reading comprehension. Secondly, it focused on the current work of multi-choice machine reading comprehension based on deep learning methods, and described the related work from four aspects: semantic matching, pre-training model, semantic reasoning and external knowledge. Next, it summarized the related datasets and evaluat ion metrics . Finally, this paper looked forward to the future development trend of multi-choice machine reading comprehension. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & 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 Feed Research is the property of Editorial Board of Feed Research 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.)

The Pinnata Fructus is the fruit of Arenga pinnata, which has obvious analgesic activity, but its chemical composition is rarely reported. In order to study the chemical compositions of the A. pinnata fruit, the compounds were separated and purified by repeated silica gel column chromatography and ODS column chromatography combined with HPLC, and the structures of the compounds were identified by using NMR spectroscopy. Twelve flavonoids were isolated from the 70% ethanol extraction of A. pinnata fruit, which were identified as neosmitilbin (1), glycyrrhizin (2), genistein (3), 2, 4, 4'-trihydroxychalcone (4), glycyrrhizin (5), genistein-7-O-β-D-glucopyranoside (6), isoglycyrrhizin (7), neo isoliquiritin (8), daidzin (9), 7-O-primverosylformononetin (10), icuraside (11), calycosin 7-O-β-glucoside (12). These twelve compounds were all isolated from A. pinnata fruit for the first time. [ABSTRACT FROM AUTHOR]

Copyright of Journal of South China Normal University (Natural Science Edition) / Huanan Shifan Daxue Xuebao (Ziran Kexue Ban) is the property of Journal of South China Normal University (Natural Science Edition) 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 Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & 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 Chinese Journal of Preventive Veterinary Medicine / Zhongguo Yufang Shouyi Xuebao is the property of Chinese Journal of Preventive Veterinary Medicine 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.)

[Objective] The effects of nitrogen reduction combined with different mulching methods on water-saving and yield-increasing of winter wheat were studied in dry land of Loess Plateau, to explore dry land winter wheat yielding under reduced nitrogen binding overlay mode, efficient and environmentally friendly cultivation fertilization techniques. [Methods] A field test was conducted in Yongshou county Shaanxi province in 2014 -2016 years, to determine the effects of nitrogen reduction and different mulching methods on winter wheat yield, water use efficiency and root growth. [Result] Under the nitrogen application rate of 150 kg, hm-2, compared with the household nitrogen reduction, the physiological efficiency of nitrogen fertilizer of ridge mulching and furrow sowing increased by 12% in the fust year, water consumption increased by 7% in second year. The yield and water storage before sowing and physiological efficiency of nitrogen fertilizer of whole film mulching increased by 15%, 15 % and 16 % in the first year, while increasing by 12%, 10% and 35% in second year. The yield and water storage before sowing of straw mulching increased by 9 % and 16 % in the first year, water use efficiency and above-ground nitrogen uptake increased by 12 % and 17 % in the second year respectively. The total root length of ridge mulching and furrow sowing and whole film mulching decreased 35 % and 26 % in the first year. The total dry weight and total root length of straw mulching decreased 63 % and 43 % in the first year, while decreasing by 41 %, 10 % and 17 % in second year. [Conclusion] Compared with the farmer model, there was no significant effect of nitrogen reduction on yield, water use and root growth of winter wheat compared with farmer model. Under the nitrogen application rate of 150 kg / hm-2. Compared with the farmer nitrogen reduction, the ridge mulching and furrow sowing increased the nitrogen fertilizer physiological efficiency and water consumption. The whole film mulching significantly increased winter wheat yield, water storage and water use efficiency, and the nitrogen absorption and utilization efficiency can be improved. Straw mulching significantly increased water storage and water use efficiency before sowing, thereby increasing winter wheat yield. Reducing total root weight and total root length of dry winter wheat by ridge mulching and furrow sowing, whole film mulching and straw mulching. Therefore, the nitrogen reduction combined with different cover measures is an important measure to achieve efficiency of dry land winter wheat yield. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Veterinary Science / Zhongguo Shouyi Xuebao is the property of Chinese Society of Veterinary Science 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.)