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TRANSIENT FLOWS AND PRESSURE WAVES IN PIPES

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Journal of Hydrodynamics 1995年第2期7卷 51-59页

作者： wang, xiuqing Sun, J.G. Sha, W.T. Nuclear Industry Management Inst Beijing China

Transient laminar flows and pressure-wave propagation in pipes, commonly called as water hammer, have been analyzed. A pressure-wave equation and a linearized velocity equation were derived from the equations of mass and momentum conservation. The waveform distortion due to viscous dissipation and elastic expansion of pipe wall was characterized by a dimensionless transmission number. The damping coefficients of pressure waves were found to be related to the roots of Bessel function. An exact solution of pressure-wave equation was obtained numerically. The relationship between the distortion of a traveling wave and transmission number was studied. The problem was also calculated with a general-purpose computer code, COMMIX, which solves exact mass conservation equation and Navier-Stokes equations. The computational results of the COMMIX code agreed well with the analytical solutions.

关键词： Computer simulation Differential equations Pipe flow Water wave effects

Research on Normal Pythagorean Neutrosophic Set Choquet Integral Operator and Its Application

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Computer Modeling in Engineering & Sciences 2022年第4期131卷 477-491页

作者： Changxing Fan Jihong Chen Keli Hu En Fan xiuqing wang Department of Computer Science Shaoxing UniversityShaoxingChina College of Management Shenzhen University ShenzhenChina Information Technology R&D Innovation Center of Peking University ShaoxingChina

We first propose the normal Pythagorean neutrosophic set(NPNS)in this paper,which synthesizes the distribution of the incompleteness,indeterminacy,and inconsistency of the Pythagorean neutrosophic set(PNS)and normal fuzzy *** also define some properties of *** solving the decision-making problem of the nonstrictly independent and interacting attributes,two kinds of NPNS Choquet integral operators are ***,the NPNS Choquet integral average(NPNSCIA)operator and the NPNS Choquet integral geometric(NPNSCIG)operator are ***,their calculating formulas are derived,their properties are discussed,and an approach for solving the interacting multi-attribute decision making based on the NPNS is ***,the two kinds of operators are applied to validate the stability of the new method.

关键词： Normal pythagorean neutrosophic set(NPNS) NPNS choquet integral average(NPNSCIA)operator NPNS choquet integral geometric(NPNSCIG)operator multi-attribute decision making(MADM)

Anti-biofilm and remineralization effects of chitosan hydrogel containing amelogeninderived peptide on initial caries lesions

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Regenerative Biomaterials 2018年第2期5卷 69-76页

作者： Qian Ren Zhongcheng Li Longjiang Ding xiuqing wang Yumei Niu Xi Qin Xuedong Zhou Linglin Zhang State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseasesand Department of Cariology and EndodonicsWest China Hospital of StomatologySichuan UniversityNo.143rd SectionRenmin Nan LuChengduPeople’s Republic of China

In this study,we have designed a more clinically powerful anti-caries treatment by applying the amelogenin-derived peptide QP5 to the antibacterial carrier material chitosan in a hydrogel(CS-QP5 hydrogel),and characterized its effects on the inhibition of a cariogenic biofilm and the promotion of the remineralization of the initial caries *** results indicated that the CS-QP5 hydrogel sustainably inhibited the growth of the Streptococcus mutans biofilm,lactic acid production and the metabolic activity over a prolonged period of ***,the CS-QP5 hydrogel promoted the remineralization of early enamel lesions,which were indicated by surface microhardness(,polarized light microscopy and transverse *** conclusion,the CS-QP5 hydrogel shows good potential for caries control in the clinic because of its antibacterial effects as well as the remineralization of initial enamel carious lesions even in a biofilm model over a prolonged period of time.

关键词： caries amelogenin-derived peptide chitosan remineralization

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束缚磁极化子的有效质量与共振频率的关系

固体电子学研究与进展 2011年第6期31卷 549-552页

作者：王秀清内蒙古民族大学物理与电子信息学院内蒙古通辽028043

采用改进的线性组合算符法和幺正变换方法,研究极性晶体膜中束缚磁极化子的有效质量与振动频率λ的变化关系。得出束缚磁极化子的有效质量均由两部分组成:第一部分是由于电子-体LO声子相互作用所引起的;第二部分则是电子-SO声子相互作... 详细信息

采用改进的线性组合算符法和幺正变换方法,研究极性晶体膜中束缚磁极化子的有效质量与振动频率λ的变化关系。得出束缚磁极化子的有效质量均由两部分组成:第一部分是由于电子-体LO声子相互作用所引起的;第二部分则是电子-SO声子相互作用引起的。后者又包含两部分,分别是电子与极性膜中两支表面声子相互作用的贡献。而且当λ<20×1012s-1(ωc<40×1012s-1)时,有效质量随着回旋共振频率ωc的增加而迅速增加,这主要是由于磁场的存在,使电子-声子之间的相互作用改变,极化子效应增大而引起的。

关键词：束缚磁极化子有效质量振动频率

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中国农业经济百年巨变

农业经济问题 2005年第11期26卷 4-8页

作者：王秀清中国农业大学经济管理学院北京100094

本文在对近百年来中国农业经济发展经历进行梳理的基础上,从八个方面系统总结了百年以来中国农业经济所发生的巨大变化。

关键词：中国农业经济百年历程变化发展经历

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基于作物病害胁迫声发射的精准施药

农业工程学报 2011年第3期27卷 205-209页

作者：王秀清游国栋杨世凤天津科技大学电子信息与自动化学院天津300222

作物病害胁迫声发射技术是当前植保信息化研究的重要内容。该文在分析作物病害胁迫的程度与声发射、环境因子之间的关系的基础上,设计了基于作物病害胁迫声发射机理的精准施药模糊控制模型,提出了适用于现场环境的精准施药自学习模糊算... 详细信息

作物病害胁迫声发射技术是当前植保信息化研究的重要内容。该文在分析作物病害胁迫的程度与声发射、环境因子之间的关系的基础上,设计了基于作物病害胁迫声发射机理的精准施药模糊控制模型,提出了适用于现场环境的精准施药自学习模糊算法。并利用MATLAB对系统模型进行了仿真。结果表明,该模型可方便地控制系统的施药量变化,并能达到较满意的控制效果。该研究为作物精准施药的智能控制提供了一种新的控制思路及方法。

关键词：作物病害胁迫声发射技术精准施药自学习模糊控制系统

考虑电子与表面光学声子相互作用的极性晶体膜量子比特

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量子电子学报 2017年第2期34卷 252-256页

作者：王秀清内蒙古民族大学物理与电子信息学院内蒙古通辽028043

基于线性组合算符法和变分法,讨论了极性晶体膜中电子与表面光学声子(SO)耦合强、与体纵光学声子(LO)耦合弱的电子-声子相互作用系统的量子比特及其声子效应。当膜中电子处于基态和第一激发态的叠加态,电子的概率密度在空间做周期性振... 详细信息

基于线性组合算符法和变分法,讨论了极性晶体膜中电子与表面光学声子(SO)耦合强、与体纵光学声子(LO)耦合弱的电子-声子相互作用系统的量子比特及其声子效应。当膜中电子处于基态和第一激发态的叠加态,电子的概率密度在空间做周期性振荡。结果表明振荡周期随耦合强度的增加而减小,随极化子振动频率的增加而增大。考虑电子与SO声子的相互作用,极化子振动频率发生变化,引起电子概率密度发生改变。

关键词：光电子学极性晶体膜量子比特表面光学声子