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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 Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis 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 Agro-Environment Science is the property of Journal of Agro-Environment Science 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.)

Extreme events happen frequently in the context of global warming, particularly in the arid and semi-arid regions, such as Xinjiang. The global surface temperature has increased to allow more water vapor entering the atmosphere, which intensifying the global water cycle. Meanwhile, extreme precipitation events can be more frequent and intense both regionally and globally in the future. Global warming has led to variation in the precipitation types, resulting in more precipitation in the form of rainfall in some regions. In previous studies, extreme precipitation has been often studied as a whole, whether the extreme rainfall or snowfall has been discussed separately in some cases. But, only a few studies have been reported on the differences between extreme rainfall and extreme snowfall. The Clausius-Clapeyron equation hypothesis (hereafter referred to as the C-C equation) can be considered as the physical mechanism under extreme precipitation (rain and snow) events. At the same time, the atmospheric water holding capacity can be assumed to increase by approximately 7% with the increase of every 1°C in temperature under a constant relative humidity. However, there are some differences in some regions, such as most parts of Europe, North America, and the Tibetan Plateau, where the increase of extreme precipitation intensity can be much less than 7% with the increase of every 1°C in temperature, (so-called sub-C-C rate). Even some regions experience extreme precipitation intensities with the increase of temperature up to 14% (the “super-C-C” rate), such as Hong Kong and the De Beers region of the Netherlands. And even more, there is a negative relationship between extreme precipitation intensity and temperature in tropical regions. Therefore, it is necessary to discuss the relationship among extreme rainfall, extreme snowfall intensity, and temperature at various stations. In this study, the rainfall and snowfall events were separated from the wet-bulb temperature method using the data from 75 observing meteorological stations from 1961 to 2020, which has an overall accuracy of 95%. The percentile approach (95th percentile) was also used to define the extreme precipitation (rain and snow), further to determine the overall characteristics of extreme precipitation and frequency changes in this region, while the spatial variation differences between the northern and southern part in Xinjiang, as well as the response mechanisms of the intensity of extreme rainfall and extreme snowfall to temperature changes. The results show that there was an increasing trend in the amount and frequency of average annual precipitation (rain and snow) and the average annual extreme precipitation (rain and snow). The increase in the amount and frequency of rainfall, extreme rainfall, snowfall and extreme snowfall was greater in the northern region than that in the southern region (except for the frequency of rainfall). The mean contribution of extreme precipitation (rain and snow) to precipitation (rain and snow) was greater than 26%, both of which showed an increasing trend. The response of extreme rainfall and snowfall to temperature changes in both the northern and southern parts was less than the expectation of the C-C equation, i.e. the “sub C-C rate”. Once a certain temperature was exceeded, there was an inhibiting effect on the intensity of extreme rainfall and snowfall. The study will contribute to the scientific understanding of the changing characteristics of extreme precipitation events in the Xinjiang and is of great significance to the rational regulation of regional hydrological and water resources. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agricultural Resources & Environment / Nongye Ziyuan yu Huanjing Xuebao is the property of Journal of Agricultural Resources & Environment 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.)

Copyright of Journal of Shanghai Jiaotong University (Medical Science) is the property of Journal of Shanghai Jiaotong University (Medical 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 Shanghai Jiaotong University (Medical Science) is the property of Journal of Shanghai Jiaotong University (Medical 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.)

OBJECTIVE: To probe into the efficacy of ligustrazine hydrochloride in treatment of coronary heart disease (CHD). METHODS: 60 patients with CHD admitted into Jiangxi Wuyuan County Traditional Chinese Medicine Hospital from Jan. 2016 to Jan. 2018 were retrospectively selected and divided into two groups according to different therapeutic regimens, the control group (30 cases) was given conventional therapy, the observation group (30 cases) was added ligustrazine hydrochloride. Differences in attack frequencies and durations of angina pectoris, the usage amounts of nitroglycerin, effective rates of electrocardiogram (ECG) and hemorheological indices between two groups were compared. RESULTS: After treatment, the usage amount of nitroglycerin, attack times and attack frequencies of angina pectoris of both groups had been significantly improved, and those of the observation group were significantly better than the control group, with statistically significant differences (P <0.05); the total effective rate of ECG of observation group was 90.00% (27/30), which was significantly higher than that of the control group (66.67%, 20/30), with statistically significant difference (P < 0.05); after treatment, the platelet aggregates ratios, whole blood viscosity high shear, whole blood viscosity low shear, plasma viscosity, hematocrit and fibrinogen levels of the observation group were significantly lower than the control group, with statistically significant differences (P <0.05). CONCLUSION: Ligustrazine hydrochloride can effectively alleviate symptoms of coronary heart disease, with remarkable efficacy. [ABSTRACT FROM AUTHOR]

Associative classification is a significant data mining technique. The schema with support and confidence is commonly employed in the state-of-the-art associative classification methods. Since the classification based on support is very simple and the classification based on confidence fails to measure the correlation between itemset and class, these methods tend to generate many inferior rules. In this paper, we propose an improved associative classification approach based on support and enhancement ra­tio (ACSER). The ACSER considers the support oi itemset both in the target class and in its complement class. Firstly, frequent enhancement ratio patterns are extracted from training data as candidate classification rules. Secondly, the ACSER ranks and prunes the extracted rules according to the rule in­tensity measured by confidence and enhancement ratio. Finally, the ACSER selects the best k rules to predict unknown objects. Experiments on 16 UCI datasets show that the improved approach has higher accuracy than the traditional approaches based on support and confidence. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Bohai University (Philosophy & Social Science Edition) / Bohai Daxue Xuebao (Zhexue Shehuikexue Ban) is the property of Bohai Daxue 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.)