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Dynamics of rotator chain with dissipative boundary

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Frontiers of physics 2014年第4期9卷 511-518页

作者： pu ke Zhi-Gang Zheng Department of Physics and the Beijing Hong Kong Singapore Joint Center for Nonlinear and Complex Systems (Beijing) Beijing Normal University Beijing 100875 China

We study the deternfinistic dynanfics of rotator chain with purely mechanical driving on the boundary by stability analysis and numerical sinmlation. Globally synchronous rotation, clustered synchronous rotation, and split synchronous rotation states are identified. In particular, we find that the single-peaked wariance distribution of angular momenta is the consequence of the deterministic dynamics. As a result, the operational definition of temperature used in the previous studies on rotator chain should be revisited.

关键词： rotator chain energy conduction

Smooth Solutions for a Stochastic Hydrodynamical Equation in Heisenberg Paramagnet

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Acta Mathematica Sinica,English Series 2011年第9期27卷 1855-1868页

作者： Xue ke pu Bo Ling GUO Yong Qian HAN College of Mathematics and Physics Chongqing University Chongqing 400044 P. R. China Institute of Applied Physics and Computational Mathematics P. O. Box 8009 Beijing 100088 P. R. China

In this article, we consider a stochastic hydrodynamical equation in Heisenberg paramagnet driven by additive noise. We prove the existence and uniqueness of smooth solutions to this equation with difference method.

关键词： Stochastic partial differential equations Heisenberg paramagnet smooth solution difference method

New Periodic Wave Solutions, Localized Excitations and Their Interaction Properties for （3＋1）-Dimensional Jimbo-Miwa Equation

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Communications in Theoretical Physics 2007年第4X期48卷 584-590页

作者： DOU Fu-Quan SUN Jian-An DUAN Wen-Shan LU ke-pu College of Physics and Electronics Engineering Northwest Normal University Lanzhou 730070 China

Based on the multi-linear variable separation approach, a class of exact, doubly periodic wave solutions for the （3＋1）-dimensional Jimbo-Miwa equation is analytically obtained by choosing the Jacobi elliptic functions and their combinations. Limit cases are considered and some new solitary structures （new dromions） are derived. The interaction properties of periodic waves are numerically studied and found to be inelastic. Under long wave limit, two sets of new solution structures （dromions） are given. The interaction properties of these solutions reveal that some of them are completely elastic and some are inelastic.

关键词： Jimbo-Miwa equation Jacobi elliptic function periodic solutions dromions

Hot Dust Acoustic Solitary Waves in Dust Plasma with Variable Dust Charge

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Chinese Physics Letters 2001年第8期18卷 1088-1089页

作者： DUAN Wen-Shan LÜ ke-pu ZHAO Jin-Bao Department of Physics Northwest Normal UniversityLanzhou 730070

Considering the variation of dust charges,We have analytically studied the governing equation for the system with the same model as that for cold dust acoustic waves in a demagnetized plasma but the contribution of hot *** result indicates that the governing equation is also a Korteweg-de Vries equaiton,although its amplitude and width will be smaller compared with the cold dust case.

关键词： equation governing charges

New Modified Jacobi Elliptic Function Expansion Method and Its Application to （3＋1）-Dimensional KP Equation

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Communications in Theoretical Physics 2006年第6期45卷 1063-1068页

作者： DOU Fu-Quan SUN Jian-An DUAN Wen-Shan SHI Yu-Ren Lü ke-pu HONG Xue-Ren College of Physics and Electronics Engineering Northwest Normal University Lanzhou 730070 China

With the aid of computerized symbolic computation, the new modified Jacobi elliptic function expansion method for constructing exact periodic solutions of nonlinear mathematical physics equation is presented by a new general ansatz. The proposed method is more powerful than most of the existing methods. By use of the method, we not only can successfully recover the previously known formal solutions but also can construct new and more general formal solutions for some nonlinear evolution equations. We choose the （3＋1）-dimensional Kadomtsev-Petviashvili equation to illustrate our method. As a result, twenty families of periodic solutions are obtained. Of course, more solitary wave solutions, shock wave solutions or triangular function formal solutions can be obtained at their limit condition.

关键词： MJEFE method KP equation periodic solutions solitary wave solutions

Diagnostic accuracy of transient elastography (Fibro Scan) in detection of esophageal varices in patients with cirrhosis: A meta-analysis

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World Journal of Gastroenterology 2017年第2期23卷 345-356页

作者： ke pu Jing-Hong Shi Xu Wang Qian Tang Xin-Jie Wang Kai-Lin Tang Zhong-Qi Long Xing-Sheng Hu School of Clinical Medicine Dazhou College of Chinese Medicine Department of Immunology Shaanxi University of Chinese Medicine Department of Hepatobiliary Surgery Dachuan Southern Hospital School of Nursing Georgia Southern University School of Life Science Northwest University General Surgery Department of Jinshan Hospital The First Affiliated Hospital of Chongqing Medical University Department of Oncology Nanchong Central Hospital(The Second Affiliated Hospital of North Sichuan Medical College)

AIM To investigate the diagnostic accuracy of Fibro Scan(FS) in detecting esophageal varices(EV) in cirrhotic *** Through a systemic literature search of multiple databases, we reviewed 15 studies using endoscopy as a reference standard, with the data necessary to calculate pooled sensitivity(SEN) and specificity(SPE), positive and negative LR, diagnostic odds ratio(DOR) and area under receiver operating characteristics(AUROC). The quality of the studies was rated by the Quality Assessment of Diagnostic Accuracy studies-2 tool. Clinical utility of FS for EV was evaluated by a Fagan plot. Heterogeneity was explored using meta-regression and subgroup analysis. All statistical analyses were conducted via Stata12.0, MetaD isc1.4 and RevM *** In 15 studies(n = 2697), FS detected the presence of EV with the summary sensitivities of 84%(95%CI: 81.0%-86.0%), specificities of 62%(95%CI: 58.0%-66.0%), a positive LR of 2.3(95%CI: 1.81-2.94), a negative LR of 0.26(95%CI: 0.19-0.35), a DOR of 9.33(95%CI: 5.84-14.92) and an AUROC of 0.8262. FS diagnosed the presence of large EV with the pooled SEN of 0.78(95%CI: 75.0%-81.0%), SPE of 0.76(95%CI: 73.0%-78.0%), a positive and negative LR of 3.03(95%CI: 2.38-3.86) and 0.30(95%CI: 0.23-0.39) respectively, a summary diagnostic OR of 10.69(95%CI: 6.81-16.78), and an AUROC of 0.8321. A meta-regression and subgroup analysis indicated different etiology could serve as a potential source of heterogeneity in the diagnosis of the presence of EV group. A Deek's funnel plot suggested a low probability for publication *** Using FS to measure liver stiffness cannot provide high accuracy for the size of EV due to the various cutoff and different etiologies. These limitations preclude widespread use in clinical practice at this time; therefore, the results should be interpreted cautiously given its SEN and SPE.

关键词： Transient elastography FibroScan Liver cirrhosis Meta-analysis Esophageal varices

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图书馆空间要素场景化适配模型与路径研究

国家图书馆学刊 2019年第1期28卷 46-56页

作者：蒲科攀枝花学院图书馆

场景时代,空间建设场景化是图书馆未来的发展趋势。基于图书馆空间建设的现状及问题,阐释图书馆空间要素场景化构建的目的和方式,提出图书馆空间场景的建筑、资源、技术、服务、设施五个维度的要素情境,构建沿着"输入层-汇聚层-核心层-... 详细信息

场景时代,空间建设场景化是图书馆未来的发展趋势。基于图书馆空间建设的现状及问题,阐释图书馆空间要素场景化构建的目的和方式,提出图书馆空间场景的建筑、资源、技术、服务、设施五个维度的要素情境,构建沿着"输入层-汇聚层-核心层-应用层"逐层演进的适配模型和沿着"用户-要素-情境-场景-体验-修正"逐步推进的适配路径,并以深圳图书馆新馆为例,解析图书馆空间要素场景化适配的效果。

关键词：图书馆场景化适配适配方式适配模型适配路径

大数据驱动下图书馆服务模式的创新路径与价值增值研究

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国家图书馆学刊 2020年第4期29卷 65-74页

作者：蒲科攀枝花学院图书馆

在大数据离散化解构和全息化重构的驱动下,图书馆服务中的资源、空间和用户三个基本要素间的关系转变为资源大数据、场景大数据和用户大数据间的关联,图书馆服务模式从"以资源为核心"到"以场景为核心"再到"以用户为核心",实现了服务模... 详细信息

在大数据离散化解构和全息化重构的驱动下,图书馆服务中的资源、空间和用户三个基本要素间的关系转变为资源大数据、场景大数据和用户大数据间的关联,图书馆服务模式从"以资源为核心"到"以场景为核心"再到"以用户为核心",实现了服务模式的创新和服务价值的增值。构建和落实"以用户为中心"的服务模式,精准对接用户需求,提供用户"感知有用"的服务,是未来图书馆创新发展的方向与目标。

关键词：大数据图书馆服务模式创新创新路径价值增值

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图书馆场景化模式与运行机理

国家图书馆学刊 2017年第5期26卷 32-38页

作者：蒲科攀枝花学院图书馆

场景化服务是图书馆转型发展的重要路径。以场景为切入点,提出自然和谐、功能多元、资源丰富、智能高效、人本开放的图书馆场景化模式,并基于此探讨图书馆外部环境、内部空间、服务保障、资源保障、设备与技术保障的构建策略。图书馆场... 详细信息

场景化服务是图书馆转型发展的重要路径。以场景为切入点,提出自然和谐、功能多元、资源丰富、智能高效、人本开放的图书馆场景化模式,并基于此探讨图书馆外部环境、内部空间、服务保障、资源保障、设备与技术保障的构建策略。图书馆场景化模式在需求牵引、创新驱动和协同竞争等机理的推动下实现不断优化和持续发展。图1。参考文献25。

关键词：图书馆场景化场景化空间场景化服务运行机理