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Sy.metry.Reductions of a 1.5-Lay.r Ocean Circulation Model

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Communications in Theoretical Phy.ics 2007年第5X期48卷 895-900页

作者： HUANG fei Center of Nonlinear Science Ningbo University Ningbo 315211 China Department of Marine Meteorology Physical Oceanography Laboratory Ocean University of China Qingdao 266003 China Department of Phy.ics Shanghai Jiao Tong University Shanghai 200030 China

The （2＋1）-dimensional nonlinear 1.5-lay.r ocean circulation model without external wind stress forcing is analy.ed by.using the classical Lie group approach. Some Lie point sy.metries and their corresponding two-di... 详细信息

关键词： sy.metry similarity.reductions 1.5-lay.r ocean circulation model

A fluctuation theorem for Floquet quantum master equations

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Communications in Theoretical Phy.ics 2020年第9期72卷 127-131页

作者： fei Liu School of Phy.ics Beihang UniversityBeijing 100191China

We present a fluctuation theorem for Floquet quantum master equations. This is a detailed version of the famous Gallavotti–Cohen theorem. In contrast to the latter theorem, which involves the probability.distribution of the total heat current, the former involves the joint probability.distribution of positive and negative heat currents and can be used to derive the latter. A quantum two-level sy.tem driven by.a periodic external field is used to verify.this result.

关键词： Floquet quantum master equations Gallavotti–Cohen fluctuation theorem large deviation principle positive and negative heat currents

Some　of　Advances　on　the　Error　Analy.is　in　the　Frequency.Domain　for　a　Digital　Simulation　Model

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Journal of Sy.tems Engineering and Electronics 1994年第3期5卷 2-19页

作者： fei, Jinggao Beijing Inst of Computer Application and Simulation Technology Beijing China

This paper survey. a number of recent advances in the error analy.is in the frequency.domain for a digital simulation model. It is emphasized to discuss the errors in characteristic roots and transfer funcnon of the digital simulation model, the frequency.domain errors of the data transfers between thesimulation submodels, and some compensation methods for the errors. Some of the questions to be answered are also presented.

关键词： Digital simulation Model Frequency.domain Error analy.is.

Investigation into phantom downlinks and development of a prevention algorithm in rotary.steerable sy.tem

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Petroleum 2021年第3期7卷 349-355页

作者： fei Li Shaanxi Key.Laboratory.of Measurement and Control Technology.for Oil and Gas Wells Xi’an Shiyou UniversityXi’an710065China School of Electronic Engineering Xi’an Shiyou UniversityXi’an710065China

This paper investigated the failure cause of phantom downlinks of a flow rate detection mechanism in a rotary.steerable sy.tem and developed a prevention *** is the process of controlling a drilling tool from the surface by.sending commands to *** drillers send downlinks to the rotary.steerable sy.tem to adjust steering parameters to achieve the desired well *** downlink demodulation of downhole tools is achieved through the measurement of flow rate and correlation of waveform with predefined command models;downlink acceptance is based on the correlation *** case study.revealed that phantom downlinks were due to the variation of turbine rotation speed,which was the result of alternator load changes.A prevention algorithm of conducting a signal energy.check was proposed and *** algorithm can successfully.prevent phantom downlinks that are usually.of low-level energy.and only.accept authentic *** work improved the downlinking reliability.of the rotary.steerable *** methodology.can be further applied to other downlink demodulation mechanisms using collar speed or pressure measurement.

关键词： Downlink Demodulation Drilling Rotary.steerable sy.tem Energy.check

On the Dy.amics of a Family.of Entire Functions

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Acta Mathematica Sinica,English Series 2013年第11期29卷 2047-2072页

作者： fei y.NG Department of Mathematics Nanjing University

We prove that for any.bounded ty.e irrational number 0 〈 0 〈 1, the boundary.of theSiegel disk of fα（z） = e^2πiθsin（z）＋ αsin^3（z）, a E C, which centered at the origin, is a quasicircle passing through 2,... 详细信息

关键词： Siegel disk quasicircle quasiconformal surgery

Oscillations of coefficients of sy.metric square L-functions over primes

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Frontiers of Mathematics in China 2015年第6期10卷 1325-1341页

作者： fei HOU School of Mathematics Shandong University Jinan 250100 China

Let L（s, sy.2f） be the sy.metric-square L-function associated to a primitive holomorphic cusp form f for SL（2, Z）, with tf（n, 1） denoting the nthcoefficient of the Dirichlet series for it. It is proved that, forN≥2and any.∈ there exists an effective positive constant c such that ∑n≤N∧（n）tf（n,1）e（nα）〈〈N exp （-c√logN,where ∧（n） is the von Mangoldt function, and the implied constant only.depends on f. We also study.the analogue of Vinogradov＇s three primes theorem associated to the coefficients of Rankin-Selberg L-functions.

关键词： sy.metric-square L-function primitive holomorphic cusp form,Fourier coefficient

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坏死性凋亡分子机制及与牙周炎的相关性

中国组织工程研究 2025年第12期29卷 2569-2574页

作者：孙欢欢赵菲陶然刘冰河北医科大学口腔医学院·口腔医院河北省口腔医学重点实验室河北省口腔疾病临床医学研究中心河北省石家庄市050017

背景:近年来,随着细胞死亡研究的不断深入,坏死性凋亡逐渐成为学术界研究的热点和难点,其多种信号通路及蛋白在牙周炎的发生发展中起到不可忽视的作用,人们试图通过阻止细胞坏死性凋亡的发生,从而延缓牙周组织炎症的进程。目的:就坏死... 详细信息

背景:近年来,随着细胞死亡研究的不断深入,坏死性凋亡逐渐成为学术界研究的热点和难点,其多种信号通路及蛋白在牙周炎的发生发展中起到不可忽视的作用,人们试图通过阻止细胞坏死性凋亡的发生,从而延缓牙周组织炎症的进程。目的:就坏死性凋亡的分子机制及其与牙周炎的相关性进行综述,期望为牙周炎的预防、诊断、治疗及预后提供新思路、新方向。方法:第一作者于2023年10月应用计算机检索PubMed、中国知网等数据库建库到2024年4月发表的相关文献,以“坏死性凋亡,细胞程序性死亡,牙周炎,牙周,免疫,炎症,受体相互作用蛋白激酶1,受体相互作用蛋白激酶3,混合系列蛋白激酶样结构域”为中文检索词;“necroptosis,programmed cell death,periodontitis,periodontal,immunity.inflammation,RIP1,RIP3,MLKL”为英文检索词,阅读每篇文献的文题、摘要、引言进行初步筛选,最终纳入56篇文献进行总结分析。结果与结论:①牙周炎的主要发病机制为牙周致病菌刺激机体,导致牙周微环境发生改变,打破原有免疫平衡并释放各种炎症因子,引发炎症反应造成牙周组织破坏,坏死性凋亡可以调控牙周组织免疫炎症反应,从而影响牙周炎的发生发展进程;②坏死性凋亡的发生与多种蛋白、信号通路及信号分子有关,已有动物实验证实了磷酸化混合系列蛋白激酶样结构域(pMLKL)的表达量与炎症程度有关,且在患有牙周炎小鼠的牙周组织中,RIP3和pMLKL高表达,通过阻断RIP3/MLKL通路,有利于减少牙周组织炎症、控制牙周炎的进展;③探究pMLKL是否可作为牙周炎的诊断指标,在牙周炎的预防、诊断及治疗上有很大价值。

关键词：坏死性凋亡牙周炎炎症免疫细胞程序性死亡损伤相关分子模式 MLKL RIP3

Cataly.ic Hy.rogen Transfer Reactions

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Chinese Journal of Chemistry 2021年第12期39卷 3211-3218页

作者： Shou-fei Zhu Frontiers Science Center of New Organic Matter State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityTianjin 300071China

Our recently.studies on three ty.es of reactions with hy.rogen transfer as a key.step,including cataly.ic asy.metric proton transfer reactions using"chiral proton transfer shuttle",cataly.ic B—H bond insertion containing a hy.rogen atom transfer,and iron-cataly.ed hy.rosily.ation reactions containing hy.ride transfer were briefly.introduced.

关键词： Organic chemistry Cataly.is Hy.rogen transfer Chiral proton transfer shuttle B—H bond insertion reaction Iron cataly.is

On a Spanning K-tree Containing Specified Vertices in a Graph

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Acta Mathematicae Applicatae Sinica 2019年第4期35卷 919-923页

作者： fei-fei SONG Zhi-quan HU Department of Information & Computational Science He’nan Agricultural University Zhengzhou 450002 China Faculty.ofMath & Statistics Central China Normal UniversityWuhan 430079 China

A k-tree is a tree with maximum degree at most k. In this paper, we give a sharp degree sum condition for a graph to have a spanning k-tree in which specified vertices have degree less than t, where 1≤t≤*** denote by.σ_k(G) the minimum value of the degree sum of k independent vertices in a graph G. Let k≥2,s≥0 and 1≤t≤k be integers, and suppose G is an(s + 1)-connected graph with σ_k(G)≥|G|+(k-t)*** for any.s specified vertices, G contains a spanning k-tree in which every.specified vertex has degree at most t. This improves a result obtained by.Matsuda and Matsumura.

关键词： spanning tree k-tree (s + 1)-connected graphs degree sum condition specified vertices