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Principal Value and Its Applications for One Type of Cauchy–FantappièIntegral and the System of Equations

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Acta Mathematica Sinica,English Series 2022年第9期38卷 1537-1550页

作者： lüping CHEN School of Mathematical Sciences Xiamen UniversityXiamen 361005P.R.China

It is known that principal value plays vital roles in the study of singular *** this paper,one type of Cauchy–Fantappièintegral with multiple indexes is *** the structure of the kernel is complexity,the Jacobian determinant included in the kernel is expanded for making clearly the expression of the ***,one differential operator is utilized for setting up relations between integrals with higher and usual *** work also concerns the convergent properties of the *** order to study Hadamard principal value and composite formula of this integral,finite and divergent parts will be estimated and *** an application,solvability of the system of integral equations with higher order singularity kernel is discussed.

关键词： Principal value Cauchy–Fantappièintegral piecewise smooth manifold differential operator system of singular integral equation

工业园区挥发性有机物及其致臭物质污染特征和来源解析

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环境科学 2024年第9期45卷 5168-5178页

作者：李陵胡伟吕平江张丹徐芹袁睿江雪李振亮重庆市生态环境科学研究院城市大气环境综合观测与污染防控重庆市重点实验室重庆401336 中国环境科学研究院西南分院重庆401336

为改善工业园区挥发性有机物(VOCs)恶臭污染扰民现象,促进大气VOCs及其致臭物质的协同控制,基于对工业园区居民生活区和5个不同类型产业片区的大气VOCs的外场观测,分析居民生活区和各产业片区大气VOCs及其致臭挥发性有机物(O-VOCs)污染... 详细信息

为改善工业园区挥发性有机物(VOCs)恶臭污染扰民现象,促进大气VOCs及其致臭物质的协同控制,基于对工业园区居民生活区和5个不同类型产业片区的大气VOCs的外场观测,分析居民生活区和各产业片区大气VOCs及其致臭挥发性有机物(O-VOCs)污染特征,评估工业园区O-VOCs气味活性特征,识别关键的致臭物种及其主要来源.结果表明,工业园区居民生活区大气φ(TVOCs)和φ(O-VOCs)的均值分别为102.57×10^(−9)和72.33×10^(−9),产业片区中基础化工和医药制造片区TVOCs和O-VOCs体积分数显著高于其他片区,并且2个产业片区气味活性值的总和(OAVsum)和最大值(OAVmax)相对较高,存在潜在的异味扰民风险.总体上,居民生活区和5个产业片区中异味强度较高的O-VOCs物种类似,丙烯醛、对-二乙基苯、对-二甲苯和1,3-二乙基苯等O-VOCs物种的有效管控对于减轻或消除有机异味污染至关重要.居民生活区O-VOCs的来源解析结果表明,居民生活区O-VOCs的来源主要受到天然气化工和医药制造片区的影响,居民生活区与天然气化工和医药制造片区之间O-VOCs化学成分谱的分歧系数(CDO-VOCs)分别为0.31和0.38.主成分分析(PCA)同样印证了这一结果,居民生活区O-VOCs主要来源于天然气化工和医药制造片区,其次为钢铁制造和汽车制造片区,基础化工片区贡献最低.

关键词：致臭挥发性有机物(O-VOCs) 污染特征气味活性来源解析工业园区

喷涂聚脲弹性体及复合结构抗爆抗冲击性能研究进展

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涂料工业 2024年第1期54卷 81-88页

作者：王文斌吕平鞠家辉闫帅青岛理工大学土木工程学院山东青岛266000 青岛沙木新材料有限公司山东青岛266109

防护结构的抗爆抗冲击性能是生命安全的重要保障,材料和结构是提高防护性能的2种主要途径。喷涂聚脲弹性体凭借良好的力学性能和耗能特性被广泛运用于抗爆抗冲击防护领域。从喷涂聚脲弹性体的抗冲击性能出发,介绍了不同试验方法下喷涂... 详细信息

防护结构的抗爆抗冲击性能是生命安全的重要保障,材料和结构是提高防护性能的2种主要途径。喷涂聚脲弹性体凭借良好的力学性能和耗能特性被广泛运用于抗爆抗冲击防护领域。从喷涂聚脲弹性体的抗冲击性能出发,介绍了不同试验方法下喷涂聚脲弹性体优异的爆炸冲击防护性能,分析喷涂聚脲弹性体在不同应变率和环境下良好的适应性,发现涂层厚度和涂层构造会对材料抗冲击性能产生影响;从材料微观层面以及阻抗失配的角度综述了喷涂聚脲弹性体的抗冲击机理,最后阐述了抗冲击复合结构的耗能机理以及优化方法,指出了喷涂聚脲弹性体以及复合结构尚存在的部分问题以及发展方向。

关键词：喷涂聚脲弹性体抗冲击性能抗爆涂层复合结构耗能机理

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THE APPROXIMATION SOlUTIONS FOR HIGHER DIMENSIONAl INTEGRO-DIFFERENTIAl EQUATIONS

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Acta Mathematica Scientia 2019年第5期39卷 1309-1318页

作者： lüping CHEN School of Mathematical Sciences Xiamen University

This work deals with approximation solutions to a type of integro-differential equations in several complex variables. It concerns the Cauchy formula on higher dimensional domains. In our study, we make use of multiple power series expansions and an iterative computation method to solve a kind of integro-differential equation. We introduce a symmetrized topology product area which is called a bicylinder. We expand functions and derivatives of them to power series. Moreover we obtain unknown functions by comparing coefficients of the series on both sides of equations. We express the approximation solutions by a regular product of matrixes.

关键词： integro-differential equations polynomial approach Cauchy formula bicylinder

A Spatiotemporal-Chaos-Based Cryptosystem Taking Advantage of Both Synchronous and Self-Synchronizing Schemes

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Chinese Physics letters 2004年第6期21卷 1016-1019页

作者： lǖHua-ping WANGShi-Hong lIXiao-Wen TANGGuo-Ning KUANGJin-Yu YEWei-ping HUGang DepartmentofPhysics BeijingNormalUniversityBeijing100875 DepartmentofElectronics BeijingNormalUniversityBeijing100875 TheKeylaboratoryofBeamTechnologyandMaterialModificationofMinistryofEducation BeijingNormalUniversityBeijing100875

Two-dimensional one-way coupled map lattices are used for cryptography where multiple space units produce chaotic outputs in parallel. One of the outputs plays the role of driving for synchronization of the decryption system while the others perform the function of information encoding. With this separation of functions the receiver can establish a self-checking and self-correction mechanism, and enjoys the advantages of both synchronous and self-synchronizing schemes. A comparison between the present system with the system of advanced encryption standard (AES) is presented in the aspect of channel noise influence. Numerical investigations show that our system is much stronger than AES against channel noise perturbations, and thus can be better used for secure communications with large channel noise.

关键词： Spurious signal noise

Evolution and adjustment of land and housing policy in the process of China’s urbanization

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China Finance and Economic Review 2014年第1期3卷 99-113页

作者： lüping Ding Fujun School of Public Administration and Policy Renmin University of ChinaBeiingChina

land and housing policy has been developing towards market pricing since reform and opening up of *** has witnessed rapid urbanization and large population flows in recent *** addition,the demand and supply of land and housing in urban and rural areas are in sharp *** issues have brought greater challenges to current land and housing policy in *** paper proposes the basic thinking for adjusting land and housing policy on the basis of the urbanization theory of Jean Gottmann and Terry,***,as well as the housing market filtering *** also pushes forward the idea of establishing a construction land market that covers both urban and rural areas,and an interactive housing system,which would address the housing concerns of urban migrants and put to use vacant housing and idle homesteads in rural areas.

关键词： urbanization migrant population land policy housing policy

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斜发沸石节水控氮及增产效应的研究进展

节水灌溉 2024年第5期 94-99页

作者：孙一迪谢基淦吕玉平窦超银王学涛扬州大学水利科学与工程学院江苏扬州225009

沸石是良好的土壤改良剂,研究斜发沸石的节水控氮及增产效应对实现粮食安全、水安全和生态文明具有重要意义。在广泛收集了国内外专家学者有关研究成果的基础上,分析了斜发沸石的节水效应,综述了斜发沸石对氨挥发和氮素淋失的影响,总结... 详细信息

沸石是良好的土壤改良剂,研究斜发沸石的节水控氮及增产效应对实现粮食安全、水安全和生态文明具有重要意义。在广泛收集了国内外专家学者有关研究成果的基础上,分析了斜发沸石的节水效应,综述了斜发沸石对氨挥发和氮素淋失的影响,总结了斜发沸石对各类农作物的增产效果,为未来进一步加强定量研究和有针对性的研究提供了理论依据。

关键词：沸石水利用率氨挥发氮素淋失产量

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Comparative Studies of 1,4-Bis[2-(4-Pyridyl)ethenyl]-benzene Using Density Functional Theory

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Chemical Research in Chinese Universities 2007年第4期23卷 469-473页

作者： CHENG Jian-bo lǚ Jia-ping GONG Bao-an lI Wen-zuo Science and Engineering College of Chemistry and Biology Yantai University Yantai 264005 P. R. China

The optimized molecular structure and harmonic vibrational frequencies of a 1,4-bis [ 2-（4-pyridyl）ethenyl]- benzene（BPENB） molecule were calculated via five popular density functional theory（DFI＇） methods. On the basis of the comparison between calculated and experimental results, it is concluded that the B3PW91 and B3lYP methods are superior to the others in optimizing structures, and the BPW91 method reproduces the observed fundamental fre-quencies most satisfactorily.

关键词： 1,4-Bis[2-(4-pyridyl)ethenyl]-benzene Density functional theory Vibrational frequencies BPW91

Appraisal of treatment outcomes in integrative medicine using metabonomics:Taking non-alcoholic fatty liver disease with spleen deficiency syndrome as an example

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Journal of Integrative Medicine 2022年第6期20卷 524-533页

作者： liang Dai Jing-juan Xu Wen-jun Zhou Ai-ping lü Guang Ji Clinical Research Academy Peking University Shenzhen HospitalPeking UniversityShenzhen 518032Guangdong ProvinceChina Institute of Digestive Disease Longhua HospitalShanghai University of Traditional Chinese MedicineShanghai 200032China Department of Integrated Traditional and Western Medicine Jinling HospitalSchool of MedicineNanjing UniversityNanjing 210002Jiangsu ProvinceChina Academy of Integrative Medicine Shanghai University of Traditional Chinese MedicineShanghai 201203China School of Chinese Medicine Hong Kong Baptist UniversityHong Kong 999077China

Objective:Appraisal of treatment outcomes in integrative medicine is a challenge due to a gap between the concepts of Western medicine(WM)disease and traditional Chinese medicine(TCM)*** study presents an approach for the appraisal of integrative medicine that is based on targeted *** use non-alcoholic fatty liver disease with spleen deficiency syndrome as a test ***:A patient-reported outcome(PRO)scale was developed based on literature review,Delphi consensus survey,and reliability and validity test,to quantitatively evaluate spleen deficiency ***,a metabonomic foundation for the treatment of non-alcoholic fatty liver disease with spleen deficiency syndrome was identified via a longitudinal interventional trial and targeted ***,an integrated appraisal model was established by identifying metabolites that responded in the treatment of WM disease and TCM syndrome as positive outcomes and using other aspects of the metabonomic foundation as independent ***:Ten symptoms and signs were included in the spleen deficiency PRO *** internal reliability,content validity,discriminative validity and structural validity of the scale were all *** on treatment responses to treatments for WM disease(homeostasis model assessment of insulin resistance)or TCM syndrome(spleen deficiency PRO scale score)from a previous randomized controlled trial,two cohorts comprised of 30 participants each were established for targeted metabolomics ***-five metabolites were found to be involved in successful treatment outcomes to both WM and TCM,following quantitative comparison and multivariate ***,the model of the integrated appraisal system was exploratively established using binary logistic regression;it included 9 core metabolites and had the prediction probability of 83.3%.Conclusion:This study presented a new and comprehensive research route for integrative appraisal of treatment

关键词： Complementary and alternative medicine Integrative medicine Patient-reported outcome measures Metabolomics Non-alcoholic fatty liver disease Spleen deficiency syndrome