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Copyright of Journal of China Medical University is the property of Journal of China Medical University 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 Petroleum Geology & Oilfield Development in Daqing is the property of Editorial Department of Petroleum Geology & Oilfield Development in Daqing 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.)

Based on the daily closing price data of the internet finance index from 2012 to 2021, the two-zone MS-GARCH(1,1) model is firstly used to describe the fluctuation process of the internet finance index, and the optimal model MS(2)-EGARCH(1,1)-st is selected through analysis. The results show that the return rate of the internet finance index has two clearly divided states: the mild fluctuation state is more persistent than the shape fluctuation state, and the shape fluctuation state has asymmetric effects. Secondly, the combined model of MS-EGARCH model and quantile regression (QR) model are used to measure the risk of internet finance return series, and the success rate is calculated by Kupiec backtracking test method. The results show that the success rate of value at risk (VaR) obtained by QR-MS(2)-EGARCH(1,1)-st is higher. [ABSTRACT FROM AUTHOR]

The 5-minute high-frequency data of white sugar futures contracts SR2201 and SR2109 are taken as the research object. Under the condition that there is a long-term equilibrium relationship between them, GARCH model is constructed to describe the ARCH effect of the residual. When the complementary set empirical mode decomposition (CEEMD) method is combined with the long-term and short-term memory network (LSTM) and adaptive lifting algorithm (Adaboost), arbitrage operation is carried out by predicting the rise and fall of price difference, setting different opening and closing thresholds, and making a comparative study of four neural network arbitrage strategies in the sample range. Results show that the neural network arbitrage strategy based on CEEMD-LSTM-Adaboost model is feasible and effective in white sugar futures market, and it has more advantages than BP, LSTM and LSTM-Adaboost neural networks in terms of prediction accuracy and arbitrage effect. [ABSTRACT FROM AUTHOR]

Objective: To investigate the protective effect of isorhamnetin on hyperoxia induced acute lung injury （ALI） in rats and its possible mechanism. Methods: Thirty-two SD rats were randomly divided into normal control group, model group, isorhamnetin group and isorhamnetin+resatorvid group ［resatorvid （TAK-242） is a specific inhibitor of TLR4］, with 8 rats in each group. Normal control group was fed normally, other groups of rats were placed in the self-made hyperoxia box for 3 days to construct ALI model. After the successful construction of models, rats were injected intraperitoneally according to the dosage of each group. Model group and normal control group were injected intraperitoneally with the same volume of normal saline. Each group was injected once a day, and lasted for 7 days. Abdominal aorta blood, bronchoalveolar lavage fluid and lung tissue of rats were collected, partial pressure of oxygen （PaO2） and partial pressure of carbon dioxide （PaCO2） were measured by blood gas analyzer, wet weight/dry weight （W/D） of lung tissue was measured by oven method, pathological changes of lung tissue in rats were observed by HE staining, and lung tissue injury score was performed. Expression of TLR4 of lung tissue in rats was observed by immunofluorescence, levels of inflammatory factors in bronchoalveolar lavage fluid were detected by ELISA, expressions of Toll like receptor 4/nuclear factor-κB （TLR4/NF-κB） pathway related proteins in lung tissue of rats were determined by Western blot. Results: Compared with normal control group, PaO2 value of model group was significantly decreased, PaCO2 and W/D were significantly increased, lung tissue injury was serious, the lung injury score, levels of inflammatory factors in bronchoalveolar lavage fluid and expressions of TLR4/NF-κB pathway related protein in lung tissue were significantly increased; compared with model group, lung tissue damage in isorhamnetin group and isorhamnetin+resatorvid group were alleviated, and PaO2 value was significantly increased, PaCO2, W/D value, lung injury score, levels of inflammatory factors in bronchoalveolar lavage fluid and expressions of TLR4/NF-κB pathway related proteins in lung tissue were significantly decreased; compared with isorhamnetin group, lung tissue damage in isorhamnetin+resatorvid group was alleviated, and PaO2 value was significantly increased, PaCO2, W/D value, lung injury score, levels of inflammatory factors in bronchoalveolar lavage fluid and expressions of TLR4/NF-κB pathway related proteins in lung tissue were significantly decreased. Conclusion: Isorhamnetin can alleviate hyperoxiainduced ALI in rats by inhibiting TLR4/NF-κB pathway. [ABSTRACT FROM AUTHOR]

Copyright of Advances in Water Science / Shuikexue Jinzhan is the property of Editorial Board of Advances in Water 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 Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University 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.)

By the combination of GARCH model and quantile regression (QR) model in RMB exchange rate overnight risk, the impact of the US dollar index on it is studied. First, the Granger causality test was conducted. It was found that the US dollar index was the Granger reason for the overnight exchange rate of the RMB exchange rate. Second, when the US dollar index is added to the mean value equation of the GARCH model as the explanatory variable of the overnight exchange rate of the RMB exchange rate, the optimal model is selected according to 3 information criteria. Finally, the selected m-GARCH model and quantile regression model are combined to establish the QR-m-GARCH(1,1)-GED model to measure the risk of the RMB exchange rate overnight return series. The empirical results show that the price movement of the US dollar index has a guiding effect on the RMB exchange rate. When the US dollar index is added to the model, and the data fitting effect is better and at a high significance level. The QR-m-GARCH(1,1)-GED model has a higher accuracy in measuring risk. Therefore, investors should pay attention to the price trend of the US dollar index in avoiding the RMB exchange rate risk. [ABSTRACT FROM AUTHOR]

Objective To observe the effects of Kruppel-like factor 5（KLF5）-mediated p27kip1 on the proliferation and invasion of glioma U87 cells. Methods U87 glioma cells were cultured routinely and divided into the si-NC group and si-KLF5 group. The U87 glioma cells in the si-NC group were transfected with control siRNA，and the si-KLF5 group with KLF5 siRNA. MTS experiment was used to detect the proliferation of the two groups，flow cytometry was used to detect cell cycle，Boyden experiment was used to detect cell invasion ability，and Western blotting was used to detect the expression of cell cycle-related proteins Cyclin D1，CDK4，CDK6 and epithelial-mesenchymal transition protein Snail1. Western blotting showed that the expression level of p27kip1 in the si-KLF5 group was higher than that in the si-NC group， so the si-KLF5+si-p27kip1 group，the si-NC group，and the si-KLF5 group were set，and the cells in the si-KLF5+si-p27kip1 group U87 cells were co-transfected with p27kip1 siRNA and KLF5 siRNA，the si-KLF5 group with KLF5 siRNA，and the si-NC group with control siRNA，respectively. We compared the proliferation and invasion abilities of the three groups. Results Compared with the si-NC group，the proliferation and invasion abilities of U87 cells in the si-KLF5 group were reduced（both P<0. 05），the proportion of cells in the G1 phase increased（P<0. 05），and the expression levels of Cyclin D1，CDK4，CDK6 and Snail1 proteins decreased（all P<0. 05）. The cell proliferation and invasion abilities of the si- KLF5+si-p27kip1 group were lower than those of the si-NC group（all P<0. 05），and increased as compared with that of the si-KLF5 group（P<0. 05）. Conclusion The proliferation and invasion abilities of U87 cells decrease after interference with KLF5 expression，and the mechanism is related to the up-regulation of p27kip1 expression. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Guangxi Normal University - Natural Science Edition 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.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency 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 Natural Gas Industry is the property of Natural Gas Industry Journal Agency 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 Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control 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 Pulp & Paper is the property of China Pulp & Paper Magazines Publisher 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 comparatively analyze the safety and effectiveness of flexible ureteroscopic lithotripsy （FURL）and microchannel percutaneous nephrolithotomy（MPCNL）in the treatment of subrenal calyx calculus. Methods The clinical data of 96 patients with subrenal calyx calculus treated with FURL（40 cases）or MPCNL（56 cases）in this hospital from January 2015 to January 2017 were retrospectively analyzed. The stone clearance rate，incidence rate of complications，operation time，postoperative hospitalization time and hemoglobin decrease were compared between the two groups. Results There was no statistical difference in the stone clearance rate，incidence rate of postoperative fever and postoperative blood transfusion rate between the two groups（P>0.05）；the operative time and hospitalization time after operation in the FURL group were shorter than those in the MPCNL group，while the decrease level of postoperative hemoglobin was lower than that in the MPCNL group，the difference was statistically significant（P<0.05）. Conclusion Both FURL and MPCNL are safe and effective in the treatment of subrenal calyx calculus. Compared with MPCNL，FURL has the advantages of small trauma，less bleeding and fast recovery. [ABSTRACT FROM AUTHOR]