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电子商务对水稻产业供应链的优化研究

北方水稻 2025年第1期55卷 97-99,102页

作者：黎珍珍广西工业职业技术学院工商管理学院南宁530001

电子商务对于水稻产业供应链的优化作用不可小觑。它可借助数字化手段,拓宽销售渠道,加强信息化建设,改进物流配送体系,从而大幅提升整个产业的市场竞争力。同时,信息化建设的不断深化,能让整个供应链的运作变得更为透明和可追踪,从而... 详细信息

电子商务对于水稻产业供应链的优化作用不可小觑。它可借助数字化手段,拓宽销售渠道,加强信息化建设,改进物流配送体系,从而大幅提升整个产业的市场竞争力。同时,信息化建设的不断深化,能让整个供应链的运作变得更为透明和可追踪,从而有力保障水稻产品的品质。此外,通过应用尖端的物流管理技术及倡导绿色物流,水稻产业供应链的物流配送效率可得到显著提升。电子商务促进了水稻产业的可持续发展,推动了水稻产业的现代化进程,并为农业经济的长远繁荣注入了源源不断的活力。

关键词：电子商务水稻产业供应链优化

The cardiovascular protective effect and mechanism of calycosin and its derivatives

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Chinese Journal of Natural Medicines 2020年第12期18卷 907-915页

作者： PAN li ZHANG Xuan-Fen WEI Wan-Sheng ZHANG Jing li zhen-zhen Department of Cardiopulmonary Bypass Lanzhou University Second HospitalLanzhou 730000China Department of Orthopaedic Surgery Lanzhou University Second HospitalLanzhou 730000China

Cardiovascular disease is the main cause of mortality and morbidity in the world,especially in developing *** therapy is one of the main ways to treat cardiovascular *** them,great progress has been made in the treatment of cardiovascular diseases with traditional Chinese *** terms of experimental research,the mechanism of traditional Chinese medicine in the treatment of cardiovascular diseases has been thoroughly discussed in vitro and in *** terms of clinical treatment,traditional Chinese medicine with flavonoids,saponins and alkaloids as the main effective components has a definite effect on the treatment of cardiovascular diseases such as arrhythmia,myocardial ischemia,angina pectoris and myocardial infarction,with high safety and good application *** the further research on the effective ingredients,mechanism and adverse reactions of traditional Chinese medicine,it will be beneficial to the effectiveness of traditional Chinese medicine,reduce side effects and promote the modernization of traditional Chinese *** and its derivatives,the main bioactive flavonoids in Astragalus membranaceus have multiple biological effects,such as antioxidant,pro-angiogenesis,anti-tumour,and anti-inflammatory *** on the above biological effects,calycosin has been shown to have good potential for cardiovascular *** potent antioxidant effect of calycosin may play an important role in the cardiovascular protective *** injured cardiac myocytes,calycosin and its derivatives can alleviate the cell damage mainly marked by the release of myocardial enzymes and reduce the death level of cardiac myocytes mainly characterized by apoptosis through various *** vascular endothelial cells,calycosin also has multiple effects and multiple mechanisms,such as promoting vascular endothelial cell proliferation,exerting vasodilating effect and directly affecting the synthesis function of endothelial cel

关键词： Cardiovascular disease Calycosin Cadiac myocytes Vascular endothelial cells Protective effect

Efficient C_(2) Hydrocarbons and CO_(2) Adsorption and Separation in a Multi-site Functionalized MOF

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Chinese Journal of Structural Chemistry 2021年第8期40卷 1047-1054,970页

作者： li Gao-Peng li zhen-zhen XIE Hong-Fang FU Yun-Long WANG Yao-Yu Key Laboratory of Magnetic Molecules&Magnetic Information Materials of the Ministry of Education School of Chemistry&Material ScienceShanxi Normal UniversityLinfen 041004China Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials ScienceNorthwest UniversityXi'an 710127China Department of Clinical Laboratory The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi'an 710004China

A multi-site functionalized microporous metal-organic framework(MOF),H[Zn2(BDP)0.5(ATZ)3]·0.5 H_(2)O·0.5DMF(1),was synthesized through mixed ligands *** pore surface of complex 1 was modified by uncoordinated carboxylate O atoms,phenyl and pyridyl rings as well as-NH_(2) groups,which strengthen interactions with C2H6,C_(2)H_(4) and CO_(2) molecules and lead to efficiently selective C2H6,C_(2)H_(4) and CO_(2) uptake over CH_(4).The selective adsorption mechanism was discussed deeply based on Grand Canonical Monte Carlo(GCMC)*** is expected that this study will provide a new perspective for the rational design and synthesis of MOFs with efficient gas adsorption and separation performance.

关键词： multifunctional sites metal-organic framework selective gas adsorption molecular simulations

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Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 188-197页

作者： Shuai li zhen Ma Jin-Hua Gao School of Science Hebei University of Science and TechnologyShijiazhuang 050018China School of Electronics and Information Zhengzhou University of Light IndustryZhengzhou 450002China School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China

We theoretically investigate the spin resolved Friedel oscillation(FO)and quasiparticle interference(QPI)in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r^(-2) in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as r^(-3).Such spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment(***ález-Herrero et al.,Science 352,437(2016)).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states(FT-LDOS).Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

On P-value Combination Procedures

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Acta Mathematica Sinica,English Series 2025年第2期41卷 569-587页

作者： zhen Meng Yuke Shi Jinyi lin Qizhai li School of Statistics Capital University of Economics and BusinessBeijing 100070P.R.China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Combining p-values is a well-known issue in statistical inference. When faced with a study involving m p-values, determining how to effectively combine them to arrive at a comprehensive and reliable conclusion becomes a significant concern in various fields, including genetics, genomics, and economics, among others. The literature offers a range of combination strategies tailored to different research objectives and data characteristics. In this work, we aim to provide users with a systematic exploration of the p-value combination problem. We present theoretical results for combining p-values using a logarithmic transformation, which highlights the benefits of this approach. Additionally, we propose a combination strategy together with its statistical properties utilizing the gold section method, showcasing its performance through extensive computer simulations. To further illustrate its effectiveness, we apply this approach to a real-world scenario.

关键词： Logarithm transformation power p-value combination rank

Pulmonary Crackle Detection Based on Fractional Hilbert Transform

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Chinese Journal of Biomedical Engineering(English Edition) 2019年第4期28卷 181-184页

作者： li zhen-zhen School of Biomedical Science and Engineering South China University of TechnologyGuangzhou 510006China

Crackles are an important kind of abnormal and discontinuous lung sounds,which have been found to be correlated to types of pulmonary *** purpose of this work is to show a new perspective to solve the problem of crackle detection,based on an emerging theory of fractional Hilbert *** applying fractional Hilbert transform to lung sound signals,a two-dimension texture image can be *** texture features corresponding to crackles are quite easy to be *** illustrate the effectiveness of our method.

关键词： lung sounds pulmonary crackles fractional Hilbert transform texture feature extraction

Experimental and numerical simulation of the attenuation effect of blast shock waves in tunnels at different altitudes

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Defence Technology(防务技术) 2025年第1期43卷 120-141页

作者： Changjiang liu Hujun li zhen Wang Yong He Guokai Zhang Mingyang Wang School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact People's Liberation Army Engineering UniversityNanjing 210014China

Traffic engineering such as tunnels in various altitudinal gradient zone are at risk of accidental explosion,which can damage personnel and *** prediction of the distribution pattern of explosive loads and shock wave propagation process in semi-enclosed structures at various altitude environment is key research focus in the fields of explosion shock and fluid *** effect of altitude on the propagation of shock waves in tunnels was investigated by conducting explosion test and numerical *** on the experimental and numerical simulation results,a prediction model for the attenuation of the peak overpressure of tunnel shock waves at different altitudes was *** results showed that the peak overpressure decreased at the same measurement points in the tunnel entrance under the high altitude *** contrast,an increase in altitude accelerated the propagation speed of the shock wave in the *** average error between the peak shock wave overpressure obtained using the overpressure prediction formula and the measured test data was less than15%,the average error between the propagation velocity of shock waves predicted values and the test data is less than 10%.The method can effectively predict the overpressure attenuation of blast wave in tunnel at various altitudes.

关键词： Shock wave propagation Tunnel Altitude effect Peak overpressure Shock waves velocity Engineering safety

In situ regeneration of catalyst for Fenton-like degradation by photogenerated electron transportation:Characterization,performance and mechanism comparison

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Chinese Chemical Letters 2025年第1期36卷 529-533页

作者： Ming-zhen li Yang Zhang Kun li Ya-Nan Shang Yi-zhen Zhang Yu-Jiao Kan Zhi-Yang Jiao Yu-Yuan Han Xiao-Qiang Cao College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Engineering Research Center of Groundwater Pollution Control and Remediation Ministry of Education of ChinaBeijing Normal UniversityBeijing 100875China Environment Research Institute Shandong UniversityQingdao 266237China Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity Shandong University of Science and TechnologyQingdao 266590China

Inactivation of carbon-based transition metal catalysts,which was caused by electron loss,limited their application in advanced oxidation ***,Co and TiO_(2) double-loaded carbon nanofiber material(Co@CNFs-TiO_(2))was synthesized in this *** and chemical catalytic systems were synergized *** was eliminated within 15 *** degradation rate remained above 90%after five cycles,and the 50%promotion proved the high stability of Co@CNFs-TiO_(2).The main reactive oxygen species in this system were sulfate radicals,whereas Co and TiO_(2) represented the active sites of the catalytic *** generated from TiO_(2) during the photocatalytic process were transferred to Co,which promoted the Co(Ⅲ)/Co(Ⅱ)cycle and maintained Co in a low-valence state,thereby stimulating the generation of sulfate *** this study,the effective regulation of reactive oxygen species in the reaction system was *** results provided a guidance for in situ electron replenishment and regeneration of carbon-based transition metal catalysts,which will expand the practical application of advanced oxidation processes.

关键词： Electron transportation Catalyst regeneration Peroxymonosulfate Co Photocatalytic

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基于S变换的罗音信号检测算法

华南理工大学学报（自然科学版） 2013年第6期41卷 1-5页

作者：李真真吴效明华南理工大学生物科学与工程学院广东广州510006

呼吸音中的罗音信号随机性强,变异性大,同时又蕴含了丰富的疾病信息.为从呼吸音中有效地检测出罗音,文中引入S变换,提出了一种基于S变换的罗音信号检测算法.首先从呼吸音信号S变换的时频谱图中提取罗音的时频特征,降维后采用局部峰值判... 详细信息

呼吸音中的罗音信号随机性强,变异性大,同时又蕴含了丰富的疾病信息.为从呼吸音中有效地检测出罗音,文中引入S变换,提出了一种基于S变换的罗音信号检测算法.首先从呼吸音信号S变换的时频谱图中提取罗音的时频特征,降维后采用局部峰值判别法检测罗音.实验结果表明,该算法的罗音信号检测正确率达93.70%,检测性能优于其他算法,说明该检测算法是有效的.

关键词：信号处理信号检测罗音信号计算机辅助诊断特征提取时频分析