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Vascular protective effects of aqueous extracts of Tribulus terrestris on hypertensive endothelial injury

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Chinese Journal of Natural Medicines 2017年第8期15卷 606-614页

作者： JIANG yue-Hua GUO Jin-Hao WU Sai YANG chuan-Hua Affiliated Hospital of Shandong University of Traditional Chinese Medicine Jinan 250011China Shandong University of Traditional Chinese Medicine Jinan 250355China Qingdao Hiser medical group Qingdao 266034China

Angiotensin Ⅱ(Ang Ⅱ) is involved in endothelium injury during the development of hypertension. Tribulus terrestris(TT) is used to treat hypertension, arteriosclerosis, and post-stroke syndrome in China. The present study aimed to determine the effects of aqueous TT extracts on endothelial injury in spontaneously hypertensive rats(SHRs) and its protective effects against Ang Ⅱ induced injury in human umbilical vein endothelial cells(HUVECs). SHRs were administered intragastrically with TT(17.2.or 8.6 g·kg^(-1)·d^(-1)) for 6 weeks, using valsartan(13.5 mg·kg^(-1)·d^(-1)) as positive control. Blood pressure, heart rate, endothelial morphology of the thoracic aorta, serum levels of Ang Ⅱ, endothelin^(-1)(ET^(-1)), superoxide dismutase(SOD) and malonaldehyde(MDA) were measured. The endothelial injury of HUVECs was induced by 2.× 10–6 mol·L^(-1) Ang Ⅱ. Cell Apoptosisapoptosis, intracellular reactive oxygen species(ROS) was assessed. Endothelial nitric oxide synthase(eN OS), ET^(-1), SOD, and MDA in the cell culture supernatant and cell migration were assayed. The expression of hypertension-linked genes and proteins were analyzed. TT decreased systolic pressure, diastolic pressure, mean arterial pressure and heart rate, improved endothelial integrity of thoracic aorta, and decreased serum leptin, Ang Ⅱ, ET^(-1), NPY, and Hcy, while increased NO in SHRs. TT suppressed Ang Ⅱ-induced HUVEC proliferation and apoptosis and prolonged the survival, and increased cell migration. TT regulated the ROS, and decreased mR NA expression of Akt1, JAK2. PI3Kα, Erk2. FAK, and NF-κB p65 and protein expression of Erk2. FAK, and NF-κB p65. In conclusion, TT demonstrated anti-hypertensive and endothelial protective effects by regulating Erk2. FAK and NF-κB p65.

关键词： Tribulus Terrestris Hypertension Endothelial protection

Adaptive radio resource allocation for multiple traffic OFDMA broadband wireless access system

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The Journal of China Universities of Posts and Telecommunications 2006年第4期13卷 1-6页

作者： LU Yan-hui LUO Tao YIN Chang-chuan yue Guang-xin School of Telecommunications Engineering Beijing University of Posts and Telecommunications Beijing 100876. China School of information Engineering. Zhengzhou University. Zhengzhou 450001 China

In this article, an adaptive radio resource ＂allocation algorithm applied to multiple traffic orthogonal frequency division multiple access （OFDMA） system is proposed, which distributes subcarriers and bits among users according to their different quality of service requirements and traffic type. By classifying and priorifizing the users based on their traffic characteristic and ensuring resource for higher priority users, the new scheme decreases tremendously the outage probability of the users requiring a real-time transmission without impact on the spectrum efficiency of system, as well as the outage probability of data users is not increased compared with the radio resource allocation methods published.

关键词： adaptive radio resource allocation OFDMA multiple QoS classes

CsXDH1 gene promotes caffeine catabolism induced by continuous strong light in tea plant

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Horticulture Research 2023年第6期10卷 263-275页

作者： Qianhui Tang Keyi Liu chuan yue Liyong Luo Liang Zeng Zhijun Wu College of Food Science Southwest UniversityChongqing 400715China Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing Southwest UniversityChongqing 400715China Integrative Science Center of Germplasm Creation Southwest UniversityChongqing 401329China Tea Research Institute Southwest UniversityChongqing 400715China

Tea plant(Camellia sinensis)is an important cash crop with extensive adaptability in the ***,complex environmental factors force a large variation of tea quality-related *** is essential for the formation of bitter and fresh flavors in tea,and is the main compound of tea that improves human *** strong light stimulation was observed to cause caffeine reduction in tea leaves,but the mechanism is not *** this study,the response of tea plant to light intensity was analysed mainly by multi-omics association,antisense oligodeoxynucleotide(asODN)silencing technique,and in vitro enzyme activity *** results revealed multiple strategies for light intensity adaptation in tea plant,among which the regulation of chloroplasts,photosynthesis,porphyrin metabolism,and resistance to oxidative stress were *** catabolism was enhanced in continuous strong light,which may be a light-adapted strategy due to strict regulation by xanthine dehydrogenase(XDH).asODN silencing and enzymatic activity assays confirmed that CsXDH1 is a protein induced by light intensity to catalyze the substrate ***1 asODN silencing resulted in significant up-regulation of both caffeine and theobromine in in vitro enzyme activity assay,but not in ***1 may act as a coordinator in light intensity adaptation,thus disrupting this balance of caffeine catabolism.

关键词： metabolism stimulation caffeine

“一带一路”视域下语言测试对高校英语教学的反拨效用研究

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黑龙江教师发展学院学报 2024年第8期43卷 68-71页

作者：岳欣杨传鸣宋宝梅东北农业大学哈尔滨150030

“一带一路”视域下的复合型人才培养,已上升到国家战略层面。语言测试作为考查、评估和改进语言教学的重要手段,有助于学生了解学习成效;教师明确教学状态,优化教学行为,提高教学效果。基于此,分析语言测试的意义,探究国内外反拨效用... 详细信息

“一带一路”视域下的复合型人才培养,已上升到国家战略层面。语言测试作为考查、评估和改进语言教学的重要手段,有助于学生了解学习成效;教师明确教学状态,优化教学行为,提高教学效果。基于此,分析语言测试的意义,探究国内外反拨效用研究现状,阐述语言测试对英语教学的反拨作用,提出应用反拨效用的策略。

关键词： “一带一路” 反拨效用语言测试大学英语

Spontaneous Formation of Anti-ferromagnetic Vortex Lattice in a Fast Rotating BEC with Dipole Interactions

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Communications in Theoretical Physics 2007年第2期47卷 261-264页

作者： YANG Shi-Jie FENG Shi-Ping WEN Yu-chuan YU yue Department of Physics Beijing Normal University Beijing 100875 China Interdisciplinary Center of Theoretical Studies the Chinese Academy of Sciences P.O. Box 2735 Beijing 100080 China Institute of Theoretical Physics the Chinese Academy of Sciences P.O. Box 2735 Beijing 100080 China

When a Bose-Einstein condensate is set to rotate, superfluid vortices will be formed, which finally condense into a vortex lattice as the rotation frequency further increases. We show that the dipole-dipole interactions renormalize the short-range interaction strength and result in a distinction between interactions of parallel-polarized atoms and interactions of antiparallel-polarized atoms. This effect may lead to a spontaneous breakdown of the rapidly rotating Bose condensate into a novel anti-ferromagnetic-like vortex lattice. The upward-polarized Bose condensate forms a vortex lattice, which is staggered against a downward-polarized vortex lattice. A phase diagram related to the coupling strength is obtained.

关键词： Bose condensate dipolar interaction vortex lattice

Generalized analysis model for fractional frequency reuse

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The Journal of China Universities of Posts and Telecommunications 2010年第5期17卷 1-5页

作者： XI Wei YIN Chang-chuan yue Guang-xin SUN Hong-mei Laboratory of Wireless Cornmtmication Systems and Networks Beijing University of Posts and Telecommunications Beijing 100876 China Communication Technology Laboratory Intel China Research Center Beijing 100190 China

Fractional frequency reuse （FFR） is an effective technique to mitigate co-channel interference in orthogonal frequency division multiple access （OFDMA）-based broadband cellular *** this paper,we present a generalized model for FFR under which all existing FFR schemes can be considered as its special ***,quality factor has been proposed to indicate the quality of the *** interesting conclusion can be drawn that,as the power ratio in FFR is adjusted continuously,the corresponding quality factor varies ***,simulation is conducted based on worldwide interoperability for microwave access （WiMAX）,and the result agrees well with our theoretical ***,an effective range for power ratio is presented,which is very instructive to practical system design.

关键词： co-channel interference FFR power ratio

基于有限元法与机器学习相结合研究高温超导带材的动态电阻

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Journal of Central South University 2024年第3期31卷 737-746页

作者：肖书良曾志刚周迪帆贾焯越颜志超李奇展宋世恒蔡传兵 Department of Physics Shanghai UniversityShanghai 200444China Shanghai Key Laboratory of High Temperature Superconductors Shanghai UniversityShanghai 200444China

高温超导体在直流输运过程中,当受到外部交变磁场的影响时,会产生高温超导体独有的动态电阻现象。在高温超导带材应用的仿真研究中,使用有限元方法可以快捷地计算和分析动态电阻。然而,由于生产工艺等因素的差异,实际高温超导带材的临... 详细信息

高温超导体在直流输运过程中,当受到外部交变磁场的影响时,会产生高温超导体独有的动态电阻现象。在高温超导带材应用的仿真研究中,使用有限元方法可以快捷地计算和分析动态电阻。然而,由于生产工艺等因素的差异,实际高温超导带材的临界电流受磁场影响程度不同,表现出不同的输运特性,会给不同带材的有限元建模带来挑战。与使用经验公式或插值方法处理实际带材的临界电流数据不同,本文采用机器学习来处理三种不同商业带材的临界电流数据,并建立有限元模型来分析动态电阻特性。结果表明,机器学习具有建模高度非线性和多因素的超导临界电流特性的能力,结合了机器学习工具的有限元模型对超导动态电阻的讨论同样具有可靠的精确度及可行性。

关键词：动态电阻有限元法临界电流机器学习

Detecting P2. bots by mining the regional periodicity

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Journal of Zhejiang University-Science C(Computers and Electronics) 2013年第9期14卷 682-700页

作者： Yong QIAO yue-xiang YANG Jie HE chuan TANG Ying-zhi ZENG College of Computer National University of Defense Technology Information Center National University of Defense Technology

Peer-to-peer (P2.) botnets outperform the traditional Internet relay chat (IRC) botnets in evading detection and they have become a prevailing type of threat to the Internet *** methods for detecting P2. botnets,such as similarity analysis of network behavior and machine-learning based classification,cannot handle the challenges brought about by different network scenarios and botnet *** noticed that one important but neglected characteristic of P2. bots is that they periodically send requests to update their peer lists or receive commands from botmasters in the command-and-control (C&C) *** this paper,we propose a novel detection model named detection by mining regional periodicity (DMRP),including capturing the event time series,mining the hidden periodicity of host behaviors,and evaluating the mined periodic patterns to identify P2. bot *** our detection model is built based on the basic properties of P2. protocols,it is difficult for P2. bots to avoid being detected as long as P2. protocols are employed in their C&*** hidden periodicity mining,we introduce the so-called regional periodic pattern mining in a time series and present our algorithms to solve the mining *** experimental evaluation on public datasets demonstrates that the algorithms are promising for efficient P2. bot detection in the C&C phase.

关键词： P2. botnet detection Regional periodicity Apriori Autocorrelation function Evaluation function

Hierarchical Human Action Recognition with Self-Selection Classifiers via Skeleton Data

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Communications in Theoretical Physics 2018年第11期69卷 633-640页

作者： Ben-yue Su Huang Wu Min Sheng chuan-Sheng Shen School of Computer and Information Anqing Normal UniversityAnqing 246133China The Key Laboratory of Intelligent Perception and Computing of Anhui Province Anqing 246133China School of Mathematics and Computational Science Anqing Normal UniversityAnqing 246133China

Human action recognition has become one of the most active research topics in human-computer interaction and artificial intelligence, and has attracted much attention. Here, we employ a low-cost optical sensor Kinect to capture the action information of the human skeleton. We then propose a two-level hierarchical human action recognition model with self-selection classifiers via skeleton data. Especially different optimal classifiers are selected by probability voting mechanism and 10 times 10-fold cross validation at different coarse grained levels. Extensive simulations on a well-known open dataset and results demonstrate that our proposed method is efficient in human action recognition, achieving 94.19%the average recognition rate and 95.61% the best rate.

关键词： human action recognition hierarchical architecture model self-selection classifiers optimal classification unit