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基于结构方程模型的在线交互机制

同济大学学报（自然科学版） 2020年第5期48卷 764-770页

作者：尤建新王岑岚 tala mirzaei 宫华萍上海大学管理学院上海200444 同济大学经济与管理学院上海200092 佛罗里达国际大学商学院美国迈阿密33199 同济大学外国语学院上海200092

以价值共创为出发点,通过构建偏最小二乘法-结构方程模型(PLS-SEM)并验证,在线交互学习平台扮演着调节变量的角色。在线交互有助于用户社交价值的持续提升,进而增强用户粘性。在交互平台的调节作用下,通过直接影响和间接影响的对比揭示... 详细信息

以价值共创为出发点,通过构建偏最小二乘法-结构方程模型(PLS-SEM)并验证,在线交互学习平台扮演着调节变量的角色。在线交互有助于用户社交价值的持续提升,进而增强用户粘性。在交互平台的调节作用下,通过直接影响和间接影响的对比揭示了行为参与和认知参与对于4个维度的价值产生影响;而情感参与仅对社交价值有局部影响。研究结论揭示了平台在线交互的内在机制,对于改进交互平台的设计具有积极作用。

关键词：价值共创在线交互结构方程模型调节变量

用户参与下的“共振价值”——基于价值共创理论

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上海管理科学 2019年第2期41卷 56-61页

作者：王岑岚 tala mirzaei 上海大学管理学院上海200444 佛罗里达国际大学信息系统与商业分析系美国迈阿密33199

企业为了可持续发展,通过用户在服务平台上有意义的参与、不断的服务产品的迭代,最终趋近于一个"共振"服务生态,其最终的价值取决于价值共创的水平。如何衡量服务生态系统的价值共创水平呢?从微观层面用户参与视角,创新性地提出"共振价... 详细信息

企业为了可持续发展,通过用户在服务平台上有意义的参与、不断的服务产品的迭代,最终趋近于一个"共振"服务生态,其最终的价值取决于价值共创的水平。如何衡量服务生态系统的价值共创水平呢?从微观层面用户参与视角,创新性地提出"共振价值"的概念,为从微观层的核心主体——企业和用户切入研究价值共创的水平做出了贡献。通过对价值共创的核心主体——企业和用户的价值理论进行逻辑梳理,总结出三大价值共创要素:用户有意义的参与、价值共创平台和用户价值的产生,最终提出"共振价值",是通过一种科学的方法联合评估企业价值和用户价值最大化的管理工具。

关键词：用户参与价值共创平台用户价值共振价值

用户粘性与产品生命周期：基于文献与模糊QFD的研究

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上海质量 2019年第8期 40-48页

作者：王岑岚 tala mirzaei 上海大学管理学院佛罗里达国际大学商学院信息系统和业务分析系

价值共创是互联网下交互平台的亮点,用户粘性是其关键。本文结合文献学习和模糊质量功能展开(FUZZY QFD)揭示了用户粘性与延长产品生命周期的内在机理:吸引用户参与→实现价值共创→提增用户粘性→延长产品生命周期。以商用在线教育交... 详细信息

价值共创是互联网下交互平台的亮点,用户粘性是其关键。本文结合文献学习和模糊质量功能展开(FUZZY QFD)揭示了用户粘性与延长产品生命周期的内在机理:吸引用户参与→实现价值共创→提增用户粘性→延长产品生命周期。以商用在线教育交互平台为实证,将自然语言表达的用户价值需求转化为平台设计指标,将细化出的17项平台设计指标按重要度进行排序,以服务生命周期为时间轴,形成系统性的在线教育平台的设计指标,为解析用户粘性和促进交互平台的可持续发展提供决策支持。

关键词：用户粘性价值共创质量功能展开交互平台

Exact transverse solitary and periodic wave solutions in a coupled nonlinear inductor-capacitor network

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Chinese Physics B 2018年第9期27卷 434-443页

作者： Serge Bruno Yamgoué Guy Roger Deffo Eric tala-Tebue Francois Beceau Pelap Department of Physics Higher Teacher Training College Bambili the University of Bamenda Unité de Recherche de Mécanique et de Modélisation des Systèmes Physiques (UR-2MSP) Faculté des Sciences Université de Dschang Department of Telecommunication and Network Engineering Fotso Victor University Institute of Technology The University of Dschang P.O. Box 134 Bandjoun Cameroon

Through two methods, we investigate the solitary and periodic wave solutions of the differential equation describing a nonlinear coupled two-dimensional discrete electrical lattice. The fixed points of our model equation are examined and the bifurcations of phase portraits of this equation for various values of the front wave velocity are presented. Using the sineGordon expansion method and classic integration, we obtain exact transverse solutions including breathers, bright solitons,and periodic solutions.

关键词： nonlinear electrical lattices two-dimensional network sine-Gordon expansion exact transverse solitary wave solutions

Exact solitary wave solutions of a nonlinear Schrdinger equation model with saturable-like nonlinearities governing modulated waves in a discrete electrical lattice

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Chinese Physics B 2018年第12期27卷 420-430页

作者： Serge Bruno Yamgoue Guy Roger Deffo Eric tala-Tebue Francois Beceau Pelap Department of Physics Higher Teacher Training College BambiliThe University ofBamendaP.O.Box 39Bamenda Cameroon Unite de Recherche de Mecanique et de Modelisation des Systemes Physiques (UR-2MSP) Faculte des SciencesUniversite de DschangBP 69DschangCameroun Department of Telecommunication and Network Engineering Fotso Victor University Institute of TechnologyThe University of DschangP.O.Box 134BandjounCameroon

In this paper, we introduce and propose exact and explicit analytical solutions to a novel model of the nonlinear Schr¨odinger(NLS) equation. This model is derived as the equation governing the dynamics of modulated cutoff waves in a discrete nonlinear electrical lattice. It is characterized by the addition of two terms that involve time derivatives to the classical equation. Through those terms, our model is also tantamount to a generalized NLS equation with saturable;which suggests that the discrete electrical transmission lines can potentially be used to experimentally investigate wave propagation in media that are modeled by such type of nonlinearity. We demonstrate that the new terms can enlarge considerably the forms of the solutions as compared to similar NLS-type equations. Sine–Gordon expansion-method is used to derive numerous kink, antikink, dark, and bright soliton solutions.

关键词： nonlinear Schrdinger equation nonlinear time derivative terms saturable nonlinearity exact solitary solutions

Optical solitons for the decoupled nonlinear Schr?dinger equation using Jacobi elliptic approach

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Communications in Theoretical Physics 2021年第7期73卷 19-26页

作者： Jamilu Sabru Eric tala-Tebue Hadi Rezazadeh Saima Arshed Ahmet Bekir Department of Mathematics Northwest UniversityKanoNigeria Laboratoire d'Automatiqueetd InformatiqueAppliquee(LAIA)IUT-FV of BandjounThe University of DschangBP 134BandjounCameroon Faculty of Engineering Technology Amol University of Special Modem TechnologiesAmolIran Department of Mathematics University of the PunjabLahore 54590Pakistan Neighbourhood of Akcaglan Imarli StreetNumber:28/426030EskisehirTurkey

Most of the important aspects of soliton propagation through optical fibers for transcontinental and transoceanic long distances can best be described using the nonlinear Schr?dinger *** solitons are electromagnetic waves that span in nonlinear dispersive media and permit the stress and intensity to stay unaltered as a result of the delicate balance between dispersion and nonlinearity ***,this study exploited the Jacobi elliptic method and obtained different soliton solutions of the decoupled nonlinear Schr?dinger equation with *** about the obtained solutions were made with the aid of some 3D graphs.

关键词： Jacobi elliptic method optical fibers decoupled NLSE optical solitons

Association between heavy metals and antibiotic-resistant human pathogens in environmental reservoirs: A review

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Frontiers of Environmental Science & Engineering 2019年第3期13卷 41-57页

作者： Christine C. Nguyen Cody N. Hugie Molly L. Kile tala Navab-Daneshmand Department of Environmental Sciences Oregon State University Corvallis OR 97331 USA School of Chemical Biological and Environmental Engineering Oregon State University Corvallis OR 97331 USA School of Biological and Population Health Sciences Oregon State University Corvallis OR 97331 USA

Antibiotic resistance in human pathogens can proliferate under selective pressures. Heavy metals in environmental reservoirs may contribute to selecting antibiotic-resistant strains. To determine the associations between heavy metals and antibiotic resistance, a literature review was conducted to systematically collect and categorize evidence for co-occurrence of resistance to heavy metals and antibiotics within human pathogenic bacteria in water, wastewater, and soil. In total, 42 publications adhered to inclusion criteria. Across the reservoirs, zinc and cadmium were the most commonly observed heavy metals associated with resistance to antibiotics. Pseudomonas aeruginosa and Escherichia coli were the most commonly studied bacteria with reported co-occurrence of resistance to several heavy metals and antibiotic classes. As co-selecting agents, prevalence of heavy metals in the environment can proliferate resistance to heavy metals and antibiotics through co-resistance and crossresistance mechanisms. In comparing different reservoirs, soils and sediments harbor higher heavy metal and antibiotic resistances compared to water environments. Additionally, abiotic factors such as pH can affect the solubility and hence, the availability of heavy metals to bacterial pathogens. Overall, our review demonstrates heavy metals act as co-selecting agents in the proliferation of antibiotic resistance in human pathogens in multiple environmental reservoirs. More studies that include statistical data are needed to further describe the exposure-response relationships between heavy metals and antibiotic resistance in different environmental media. Moreover, integration of culturebased and molecular-based methods in future studies are recommended to better inform our understanding of bacterial co- and cross-resistance mechanisms to heavy metals and antibiotics.

关键词： Zinc Cadmium Copper Lead E. coli P. aeruginosa

Modulational Instability in a Pair of Non-identical Coupled Nonlinear Electrical Transmission Lines

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Communications in Theoretical Physics 2013年第7期60卷 93-100页

作者： Eric tala-Tebue Aurelien Kenfack-Jiotsa Marius Herv Tatchou-Ntemfack Timolon Crpin Kofan Laboratory of Mechanics Department of Physics Faculty of Sciences University of YaoundI Nonlinear Physics and Complex Systems Group Department of Physics The Higher Teachers' Training College University of Yaounde I

In this work, we investigate the dynamics of modulated waves non-identical coupled nonlinear transmission lines. Traditional methods for avoiding mode mixing in identical coupled nonlinear electrical lines consist of adding the same number of linear inductors in each branch. Adding linear inductors in a single line leads to asymmetric coupled nonlinear electrical transmission lines which propagate the signal and the mode mixing. On one hand, the difference between the two lines induced the fission for only one mode of propagation. This fission is influenced by the amplitude of the signal and the amount of the input energy as well; it also narrows the width of the input pulse soliton, leading to a possible increasing of the bit rate. On the other hand, the dissymmetry of the two lines converts the network into a good amplifier for the ω_ mode which corresponds to the regime admitting low frequencies.

关键词： nonlinear lines mixing suppression fission

Carbon sequestration in the total and light fraction soil organic matter along a chronosequence in grazing exclosures in a semiarid degraded sandy site in China

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Journal of Arid Land 2012年第4期4卷 411-419页

作者： YinPing CHEN YuQiang LI tala AWADA JuanJuan HAN YongQing LUO School of Environmental and Municipal Engineering Lanzhou Jiaotong University Lanzhou 730070 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China School of Natural Resources University of Nebraska Lincoln NE 68583 USA

Horqin Sandy Land is a fragile, seriously desertified region located in Inner Mongolia of China. Over- grazing is one of the primary drivers of desertification in this region. We investigated whether the establishment of grazing exclosures in areas with active sand dunes enhances soil carbon （C） sequestration and benefits soil re- covery. The results showed that soil organic C storage was 1.4, 1.9, and 3.5 times, and light fraction C storage was 2.3, 3.2, and 4.4 times in the 100-cm topsoil after 7, 12, and 25 years of grazing exclusion, respectively, compared to the case in active sand dunes. The light fraction of soil played an important role in soil C sequestration, although it might not change rapidly to provide an early indication of how soil C is increasing in response to grazing exclusion. The results indicated that soils could potentially sequester up to 13.8 Mt C in 25 years if active sand dunes in the study area were to be protected by exclosures. This corresponds to 12.8% of the estimated carbon loss （107.53 Mt） that has been associated with desertification over the past century in the Horqin Sandy Land. Our results suggested that exclosures have the capacity to increase soil C sequestration; however, decades will be required for soil C to recover to historical grassland levels observed prior to desertification.

关键词： carbon storage overgrazing exclosures desertification Horqin Sandy Land