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A Lower Bound for Linear Forms in Values of a Continued Fraction

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Acta Mathematica Sinica,English Series 2011年第10期27卷 2033-2038页

作者： xiu Yuan YU Zhong hua SHEN Department of Mathematics Hangzhou Normal University Hangzhou 310036 P. R. China Department of Computer Science Taizhou Vocational and Technical College Taizhou 318000 P. R. China

Let y = y（x） be a function defined by a continued fraction. A lower bound for │A│ =│β1y1 ＋β2y2 ＋α│ is given, where y1 = y（x1）, y2 = y（x2）, x1 and x2 are positive integers, α,β and β2 are algebraic ir... 详细信息

关键词： Continued fraction linear form lower bound

Singularity analysis of Jeffcott rotor-magnetic bearing with time delays

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Applied Mathematics(A Journal of Chinese Universities) 2012年第4期27卷 419-427页

作者： XU xiu-yan JIANG Wei-hua Department of Mathematics Heilongjiang Institute of Science and TechnologyHarbin 150027China Department of Mathematics Harbin Institute of TechnologyHarbin 150001China

A Jeffcott rotor-magnetic bearing with time delays is investigated in this paper. Firstly, it is found that the characteristic equation of the system satisfies the conditions of the singularity. Secondly, the center manifold reduction and normal form are employed to study the bifurcation from simple zero and zero-purely imaginary singularities. The results of this paper will help to understand the influence of the time delays in feedback loop on the dynamics of rotor-magnetic bearing system.

关键词： Jeffcott rotor-magnetic bearing time delay singularity normal form.

Function Projective Lag Synchronization of Chaotic Systems with Certain Parameters via Adaptive-impulsive Control

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International Journal of Automation and computing 2019年第2期16卷 238-247页

作者： xiu-Li Chai Zhi-hua Gan Institute of Image Processing and Pattern Recognition Henan University Institute of Intelligent Network System School of SoftwareHenan University

A new method is presented to study the function projective lag synchronization(FPLS) of chaotic systems via adaptive-impulsive control. To achieve synchronization, suitable nonlinear adaptive-impulsive controllers are designed. Based on the Lyapunov stability theory and the impulsive control technology, some effective sufficient conditions are derived to ensure the drive system and the response system can be rapidly lag synchronized up to the given scaling function matrix. Numerical simulations are presented to verify the effectiveness and the feasibility of the analytical results.

关键词： Function projective lag synchronization (FPLS) adaptive-impulsive chaotic systems numerical simulation Lyapunov stability theory

Unsaturated flow and solute transport in a porous column using spherical ore particles

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International Journal of Minerals,Metallurgy and Materials 2014年第2期21卷 113-121页

作者： xiu-xiu Miao Ai-xiang Wu Bao-hua Yang Jin-zhi Liu Sheng-hua Yin Hong-jiang Wang Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education) University of Science and Technology Beijing School of Information Science and Engineering Hunan International Economics University College of Information Technology Shanghai Ocean University

This paper dealt with the development of a two-dimensional （2D） mathematical model for column leaching and confirmed the important simulation parameters through experiment. The unsaturated state of the variably saturated flow column and the solute transport of copper ions were studied during leaching. The fluid flow problem was handled using the Richards equation on the premise of an ambient pressure column air, where the van Genuchten formulas were applied to define the nonlinear relationships of pressure head with the retention and permeability properties. The ore column permeability test gave a varied hydraulic conductivity, which was analyzed in the model. In the solute transport problem, the copper ion concentration was solved using the advection-diffusion-reaction equation whose reaction term was determined by the joint analysis of experimental copper leaching rate and the shrinking core model. Particle-and column-scale leaching tests were carried out to illustrate the difference and connection of copper extraction in both processes. This fluid flow and solute transport cou-pled model was determined through the finite element method using the numerical simulation software, COMSOL Multiphysics.

关键词： mathematical models leaching unsaturated flow solute transport

千岛湖区马尾松林改造后的林下植物多样性和群落稳定性

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林业科学研究 2024年第3期37卷 95-105页

作者：周秀斌徐玉华刘敏罗超潘雯李生淳安县林业局浙江杭州311700 中国林业科学研究院亚热带林业研究所浙江杭州311400

[目的]马尾松针叶林阔叶化改造有利于提升森林生态系统结构和功能,对林下植被的更新和演替也有着重要影响。分析林分改造后的林下植物多样性和稳定性特征,可为森林的可持续经营提供参考。[方法]以淳安县千岛湖林区马尾松不同改造林分(... 详细信息

[目的]马尾松针叶林阔叶化改造有利于提升森林生态系统结构和功能,对林下植被的更新和演替也有着重要影响。分析林分改造后的林下植物多样性和稳定性特征,可为森林的可持续经营提供参考。[方法]以淳安县千岛湖林区马尾松不同改造林分(Ⅰ疏伐促新、Ⅱ疏伐补阔、Ⅲ皆伐促新、Ⅳ皆伐补阔)为对象,周边无改造措施林分(Ⅴ)为对照,进行植被调查、土壤采样与测定,分析了林下植被物种组成和多样性与林地特征因子的关系,并探究了林下群落稳定性与物种多样性的关系。[结果]样地间的林下灌木层优势种的差异低于草本层,Ⅴ的林下物种多样性显著低于改造后林地(p Ⅰ>Ⅱ>Ⅲ>Ⅳ,林下灌木层稳定性与物种多样性的相关程度较低,而草本层稳定性与物种多样性呈显著负相关(p <0.05)。[结论]千岛湖区马尾松林阔叶化改造初期,主要通过降低郁闭度显著提高了林下草本层多样性,但皆伐措施的林下植物群落稳定性较低。因此,综合考虑植物多样性和稳定性维持,对马尾松林采取适当间伐等抚育措施能促进其林下植被的发展。

关键词：阔叶化改造林下植被物种多样性群落稳定性马尾松次生林

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Expert consensus on the diagnosis and treatment of macrolide-resistant Mycoplasma pneumoniae pneumonia in children

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World Journal of Pediatrics 2024年第9期20卷 901-914页

作者： Ying-Shuo Wang Yun-Lian Zhou Guan-Nan Bai Shu-Xian Li Dan Xu Li-Na Chen Xing Chen Xiao-Yan Dong Hong-Min Fu Zhou Fu Chuang-Li Hao Jian-Guo Hong En-Mei Liu Han-Min Liu Xiao-Xia Lu Zheng-xiu Luo Lan-Fang Tang Man Tian Yong Yin Xiao-Bo Zhang Jian-hua Zhang Hai-Lin Zhang De-Yu Zhao Shun-Ying Zhao Guo-Hong Zhu Ying-Xue Zou Quan Lu Yuan-Yuan Zhang Zhi-Min Chen Department of Pulmonology Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Department of Child Health Care Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Department of Pediatric Pulmonology and Immunology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Pediatrics Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021China Department of Pulmonology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Department of Pulmonary and Critical Care Medicine Kunming Children’s HospitalKunming 650034China Department of Respiratory Medicine Children’s Hospital of Chongqing Medical UniversityChongqing 400014China Department of Pulmonology Children’s Hospital of Soochow UniversitySuzhou 215003China Department of Pediatrics Shanghai General Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200080China Department of Respiratory Medicine Wuhan Children’s HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430015China Department of Respiratory Medicine Children’s Hospital of Nanjing Medical UniversityNanjing 210008China Department of Respiratory Medicine Shanghai Children’s Medical CenterShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Respiratory Medicine Children’s Hospital of Fudan UniversityShanghai 201102China Department of Pediatric Pulmonology Xinhua HospitalShanghai Jiaotong University School of MedicineShanghai 201102China Department of Pediatric Respiratory Medicine The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical UniversityWenzhou 325027China National Clinical Research Center for Respiratory Diseases Beijing Children’s HospitalCapital Medical UniversityBeijing 100045China Departmen

Background Mycoplasma pneumoniae(***)is a significant contributor to community-acquired pneumonia among *** 1968,when a strain of *** resistant to macrolide antibiotics was initially reported in Japan,macrolide-resistant ***(MRMP)has been documented in many countries worldwide,with varying incidence *** infections lead to a poor response to macrolide antibiotics,frequently resulting in prolonged fever,extended antibiotic treatment,increased hospitalization,intensive care unit admissions,and a significantly higher proportion of patients receiving glucocorticoids or second-line *** 2000,the global incidence of MRMP has gradually increased,especially in East Asia,which has posed a serious challenge to the treatment of *** infections in children and attracted widespread attention from ***,there is still no global consensus on the diagnosis and treatment of MRMP in *** We organized 29 Chinese experts majoring in pediatric pulmonology and epidemiology to write the world’s first consensus on the diagnosis and treatment of pediatric MRMP pneumonia,based on evidence *** evidence searches and reviews were conducted using electronic databases,including PubMed,Embase,Web of Science,CNKI,Medline,and the Cochrane *** used variations in terms for“macrolide-resistant”,“Mycoplasma pneumoniae”,“MP”,“***”,“pneumonia”,“MRMP”,“lower respiratory tract infection”,“Mycoplasma pneumoniae infection”,“children”,and“pediatric”.Results Epidemiology,pathogenesis,clinical manifestations,early identification,laboratory examination,principles of antibiotic use,application of glucocorticoids and intravenous immunoglobulin,and precautions for bronchoscopy are *** and rapid identification of gene mutations associated with MRMP is now available by polymerase chain reaction and fluorescent probe techniques in respiratory *** the resistance rate to mac

关键词： Child Macrolide-resistant Mycoplasma pneumoniae Recommendation Diagnosis Treatment

我国犯罪记录查询制度:现状、问题与完善路径

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江苏警官学院学报 2024年第3期39卷 55-63页

作者：黄清秀彭文华上海政法学院刑事司法学院

犯罪记录查询是为了解、掌握犯罪状况和实现犯罪治理现代化,经有权限的主体申请,由特定国家机关通过法定程序对曾犯过罪的人既往的犯罪情况进行核查、询证的活动。犯罪记录查询制度是犯罪记录查询的规则或运作模式,建立犯罪记录查询制... 详细信息

犯罪记录查询是为了解、掌握犯罪状况和实现犯罪治理现代化,经有权限的主体申请,由特定国家机关通过法定程序对曾犯过罪的人既往的犯罪情况进行核查、询证的活动。犯罪记录查询制度是犯罪记录查询的规则或运作模式,建立犯罪记录查询制度既有利于实现犯罪治理现代化,又有利于犯罪人再社会化。我国有关犯罪记录查询的规定存在抽象化、管理分散化、规范性不足等问题。犯罪记录查询制度的完善需要建立由司法行政机关主管、全国统一的犯罪记录查询数据库,明确犯罪记录数据的采录范围与传输方式,还需要对犯罪记录的查询主体、查询程序及相关配套措施作出全面、系统的规定,使犯罪记录查询制度具体化、规范化、程序化,确保在司法实践中具有可操作性。

关键词：犯罪记录查询再社会化犯罪附随后果

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疑在不疑处,崔颢《黄鹤楼》研读三题

贵州师范学院学报 2024年第7期40卷 9-17页

作者：孙秀华郭宏玮贵州师范学院生物科学学院贵州贵阳550018 贵州师范学院教师工作处贵州贵阳550018

在不疑处生疑,对被誉为“唐人七言律诗第一”的崔颢《黄鹤楼》诗进行文本细读,可厘清其艺术手法借鉴模仿的源流,可探究诗作蕴涵的忠君立场与政治思想,可深挖诗篇所隐用的祢衡典故,进而理解其“怀才不遇”等思想情感的表达。研究发现,崔... 详细信息

在不疑处生疑,对被誉为“唐人七言律诗第一”的崔颢《黄鹤楼》诗进行文本细读,可厘清其艺术手法借鉴模仿的源流,可探究诗作蕴涵的忠君立场与政治思想,可深挖诗篇所隐用的祢衡典故,进而理解其“怀才不遇”等思想情感的表达。研究发现,崔颢《黄鹤楼》诗思想感情含蓄、内敛、深沉,并非只有“日暮乡关何处是”的思乡之情。

关键词：崔颢《黄鹤楼》诗沈佺期《龙池篇》传播与接受文本细读

Comparison of Ileal Digested Production of Parental Rice and Rice Genetically Modified With Cowpeas Trypsin Inhibitor

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Biomedical and Environmental Sciences 2006年第1期19卷 42-46页

作者： JUN-hua HAN YUE-XIN YANG JIAN-hua men LI-hua BIAN JUN GUO Institute of Nutrition and Food Safety Chinese Center for Disease Control and Prevention 27 Nanwei Road Beijing 100050 China

Objective To compare the ileal digestibility of protein and amino acids in parental rice and rice genetically modified with sck gene. Methods Six experimental swines were surgically fixed with a simple T-cannula at the terminal ileum and fed with parental rice and rice genetically modified with sck gene alternately. The ileum digesta were collected and analyzed for determination of apparent and true digestibility of protein and amino acids. Results The apparent and true digestibility of protein was similar in these two types of rice. Except for the apparent digestibility of lysine, there was no difference in the apparent and true digestibility of the other 17 amino acids. Conclusion The digestibility of protein and amino acids is not changed by the insertion of foreign gene, so it can meet the request of ＂substantial equivalence＂ in digestibility of protein and amino acids.

关键词： Genetically modified rice Apparent digestibility True digestibility