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图书馆老年用户数字技能提升的影响机理和对策路径研究

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大学图书情报学刊 2025年第1期43卷 91-100页

作者：李雅郑文昕苏州大学社会学院 215123 华东师范大学信息管理系上海200062

数字技术的迅猛发展对老年群体的数字技能提出了更高要求。公共图书馆具有提升老年群体数字技能水平的社会职责。文章通过对30位受访者的半结构化访谈,运用扎根理论,借助Nvivo12软件完成三级编码工作,揭示公共图书馆服务老年用户提升数... 详细信息

数字技术的迅猛发展对老年群体的数字技能提出了更高要求。公共图书馆具有提升老年群体数字技能水平的社会职责。文章通过对30位受访者的半结构化访谈,运用扎根理论,借助Nvivo12软件完成三级编码工作,揭示公共图书馆服务老年用户提升数字技能的影响机理,构建行为机制概念模型。分析结果显示,老年用户利用图书馆提升数字技能的意向受到行为态度、知觉行为控制、主观规范等因素的影响。文章就图书馆提供老年用户数字技能服务提出建议,以期为进一步完善图书馆服务提供参考。

关键词：数字技能公共图书馆行为模式老年群体扎根理论

维普期刊数据库博看期刊

Black hole evaporation and its remnants with the generalized uncertainty principle including a linear term

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Communications in Theoretical Physics 2024年第2期76卷 125-136页

作者： Bo Yu zheng-wen Long College of Physics Guizhou UniversityGuiyang550025China

In recent years,researchers have investigated the evaporation of Schwarzschild black holes using various forms of the generalized uncertainty principle(GUP),metric quantum correction,and noncommutative geometry,***,there are differences between the GUP correction and the other two methods in terms of describing the later stages of black hole ***,some studies argue that the GUP with a negative parameter cannot effectively correct black hole evaporation,while others contend that the positivity or negativity of the GUP parameters should not affect the correction *** the above into consideration,we reconsider black hole evaporation with the generalized uncertainty principle including a linear term(LGUP),and examine the case of negative *** results indicate that the evaporation behavior of both Schwarzschild black holes and Reissner–Nordstr?m black holes,under LGUP correction,is consistent with the results of metric quantum correction and non-commutative ***,the negative parameter LGUP can also effectively correct for black hole evaporation.

关键词： black hole evaporation generalized uncertainty principle negative parameter

Interpretation of the Habit Plane of d Precipitates in Superalloy Inconel 718

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Acta Metallurgica Sinica(English Letters) 2018年第2期31卷 113-126页

作者： wen-Sheng Xu Xiao-Peng Yang wen-zheng Zhang Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 China Oxford Instruments Beijing Office Beijing 100085 China

A calculation method based on a combination of Dg parallelism rule, good matching site（GMS） analysis, CSL/DSCL（coincidence site lattice/displacement shift complete lattice） and the O-lattice theory has been applied to interpret the observation of the habit plane（HP） of the d precipitates and the linear defects in the HP in an Inconel 718 superalloy. The small scattering in the HP orientation around an ideal rational plane is interpreted by the existence of a mixture of two types of steps with different heights and inclinations. These steps play a significant role to enhance the degree of matching in the HP. They are associated with secondary dislocations, with Burgers vectors of 1/6 （1 1 2）y/1/3（0 0 1）, and with a direction parallel to a near-invariant line along （110）y. The spacing of the secondary dislocations projected on the terrace plane is around 6.3 nm. The calculated dislocation structure is in good agreement with the observation.

关键词： Good matching site Dislocation Orientation relationship Interfacial structure Coincident site lattice

The quasitriangular structures of biproduct Hopf algebras

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第1期8卷 149-157页

作者： ZHAO Li-hui ZHAO wen-zheng Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Mathematics Henan Normal University Xinxiang 453002 China

The construction of the biproduct of Hopf algebras, which consists of smash product and the dual notion of smash coproduct, was first formulated by Radford. In this paper we study the quasitriangular structures over biproduct Hopf algebras B*H. We show the necessary and sufficient conditions for biproduct Hopf algebras to be quasitriangular. For the case when they are, we determine completely the unique formula of the quasitriangular structures. And so we find a way to construct solutions of the Yang-Baxter equation over biproduct Hopf algebras in the sense of (Majid, 1990).

关键词： Hopf algebra Quasitriangular structure Biproduct

Signatures of shear thinning-thickening transition in steady shear flows of dense non-Brownian yield stress systems

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Science China Chemistry 2015年第6期58卷 1013-1020页

作者： wen zheng Yu Shi Ning Xu CAS Key Laboratory of Soft Matter Chemistry Hefei National Laboratory for Physical Sciences at the Microscale Department of Physics University of Science and Technology of China

Steady shear flows of dense athermal systems composed of soft disks are investigated via non-equilibrium molecular dynamics simulations, from which we sort out links among the structure, dynamics, and shear rheology. The systems at rest are jammed packings of frictionless disks with a nonzero yield stress. Driven by low shear rates, the flows shear thin due to the presence of the nonzero yield stress, but transit to shear thickening above a crossover shear rate γc - At γc, we observe the strongest struc- tural anisotropy in the pair distribution function, which serves as the structural signature of the shear thinning-thickening tran- sition. We also observe dynamical signatures associated with the transition： At γc , scaling behaviors of both the mean squared displacement and relaxation time undergo apparent changes. By performing a simple energy analysis, we reveal an underlying condition for the shear thickening to occur： d（lnTg）/d（Inγ）〉 2 with Tg the kinetic temperature. This condition is confirmed by simulations.

关键词： shear thickening shear thinning structural anisotropy dynamics kinetic temperature

Plate Shape Control Theory and Experiment for 20-high Mill

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Journal of Iron and Steel Research International 2015年第11期22卷 996-1001页

作者： zheng-wen YUAN Hong XIAO National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University College of Mechanical Engineering Yanshan University

Roll flattening theory is an important part of plate shape control theories for 20-high mill. In order to improve the accuracy of roll flattening calculation for 20-high mill, a new and more accurate roll flattening model was proposed. In this model, the roll barrel was considered as a finite length semi-infinite body. Based on the boundary integral equation method, the numerical solution of the finite length semi-infinite body under the distributed force was obtained and an accurate roll flattening model was established. Coupled with roll bending model and strip plastic deformation, a new and more accurate plate control model for 20-high mill was established. Moreover, the effects of the first intermediate roll taper angle and taper length were analyzed. The tension distribution calculated by analytical model was consistent with the experimental results.

关键词： 20-high mill roll flattening finite length semi-infinite body boundary integral equation method plate shape control

Transient accelerating scalar models with exponential potentials

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Research in Astronomy and Astrophysics 2013年第6期13卷 629-634页

作者： wen-Ping Cui Yang Zhang zheng-wen Fu Key Laboratory for Research in Galaxies and Cosmology The University of Science and Technology of China Chinese Academy of Sciences

We study a known class of scalar dark energy models in which the potential has an exponential term and the current accelerating era is transient. We find that, although a decelerating era will return in the future, when extrapolating the model back to earlier stages （z ≥ 4）, scalar dark energy becomes dominant over matter. So these models do not have the desired tracking behavior, and the predicted transient period of acceleration cannot be adopted into the standard scenario of the Big Bang cosmology. When couplings between the scalar field and matter are introduced, the models still have the same problem; only the time when deceleration returns will be varied. To achieve re-deceleration, one has to turn to alternative models that are consistent with the standard Big Bang scenario.

关键词： cosmology cosmological parameters -- cosmology theory

The effect of different generalized uncertainty principles on Jeans mass modification

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Communications in Theoretical Physics 2023年第10期75卷 129-137页

作者： Ye-xing Yang zheng-wen Long College of Physics Guizhou UniversityGuiyang550025China

Jeans mass is regarded as a crucial factor in the study of nebula *** data shows that Jeans mass is larger in theory than it is in *** mentioned that Jeans mass can be modified by using the generalized uncertainty principle(GUP).However,different physical backgrounds lead to different forms of GUP *** order to make the theoretical values of Jeans mass and its observed values match better,we use three distinct types of GUPs to correct Jeans mass in this *** find that the corrected Jeans masses are smaller than the uncorrected ones,where the Pedram corrected Jeans mass is the minimum and is close to the observed *** addition,we consider the impact of temperature T and the GUP parameters(η,βandγ)for the corrected Jeans mass.

关键词： Jeans mass generalized uncertainty principle Newtonian gravity

Spectrum and Spectral Singularities of a Quadratic Pencil of a Schr?dinger Operator with Boundary Conditions Dependent on the Eigenparameter

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Acta Mathematica Sinica,English Series 2023年第11期39卷 2164-2180页

作者： Xiang ZHU Zhao wen zheng Kun LI School of Mathematical Sciences Qufu Normal UniversityQufu 273165P.R.China College of Mathematics and Systems Science Guangdong Polytechnic Normal UniversityGuangzhou 510665P.R.China

In this paper,we consider the following quadratic pencil of Schr?dinger operators L(λ)generated in L~2(R~+)by the equation−y″+[p(x)+2λq(x)]y=λ^(2)y,x∈R^(+)=[0,+∞)with the boundary condition y′(0)/y(0)=β_(1)λ+β0-α_(1)λ+α0,where p(x)and q(x)are complex valued functions andα_(0),α_(1),β_(0),β_(1)are complex numbers withα_(0)β_(1)-α_(1)β_(0)≠*** is proved that L(λ)has a finite number of eigenvalues and spectral singularities,and each of them is of a finite multiplicity,if the conditions p(x),q′(x)∈AC(R^(+)),limx→∞[|p(x)|+|q(x)|+|q′(x)|]=0 and sup 0≤x0.

关键词： Schrodinger operator Strum-Liouville problems finite spectrum eigenparameter dependence