无名、无功、无己与庄子的审美人格

庄子所追求的审美人格,有一个从“有待”而“无待”的转变,一个从逻辑层面、实践层面向审美层面的递升,也是庄子以“无名”超越理性与价值,以“无功”超越功利,以“无己”回归“神人以和”的审美境界的过程。     

Controllable electron-momentum filter in a δ-doped magnetically modulated semiconductor nanostructure

ABSTRACT

We have theoretically investigated the control of wave-vector filtering (WVF) by introducing δ-doping into a magnetically modulated nanostructure fabricated by depositing ferromagnetic stripes on top and bottom of a GaAs/Al_xGa_{1 ?x}As heterostructure. With the help of an improved transfer matrix method, the Schrödinger equation for electrons in this semiconductor nanostructure is solved exactly and the transmission efficient calculated numerically. We demonstrate that the WVF efficiency is associated closely with the weight and position of the δ-doping, which may be helpful for designing a controllable electron-momentum filter based on such a magnetically modulated semiconductor nanostructure.     

Infiltration behaviour of water in a carbon nanotube under external pressure

The wetting behaviour and associated pressure effect of water in single-walled carbon nanotubes (SWCNTs) are investigated through molecular dynamics (MD) simulations. It is found that water molecules can enter SWCNTs via surface diffusion, and the effective infiltration rate increases with pressure. The effect of pressure on infiltration rate is highly non-linear, exhibiting characteristics of both hydrophilic and hydrophobic surfaces. There exists a nominal infiltration pressure that is dependent on the SWCNT size, above which the water flux is significantly increased.     

Wentzel–Kramers–Brillouin solution of cut-off frequency for horizontal shear (SH) waves in various inhomogeneous thin films

The Wentzel–Kramers–Brillouin method is employed to study the cut-off frequencies of the horizontal shear waves in a freestanding functionally graded piezoelectric–piezomagnetic material film with the electrically and magnetically open boundary conditions. An analytical solution, which could be used in analyzing the problems of various functionally graded materials, is proven to have high precision by analytical analysis and a numerical example. The results reveal that the set of cut-off frequencies is a series of approximate arithmetic progressions. A theoretical foundation based on the relationship between the cut-off frequencies and the materials’ gradient property is established for nondestructive evaluation.     

High magnetic field induction of the formation of twinned dendrites during directional solidification of Al–4.5wt%Cu alloy

It is reported that the application of a high magnetic field is capable of inducing the formation of twinned dendrites during directional solidification of Al–4.5wt%Cu alloy. Numerical results reveal that a unidirectional thermoelectric magnetic force acts on tilted dendrites during directional solidification under a magnetic field. This force should be responsible for the formation of twinned dendrites. The work may initiate a new method for inducing twinned dendrites in Al-based alloys via an applied high magnetic field during directional solidification.     

Mechanochemical synthesis for studying the melting of metallic nanoparticles: a case study of copper

Mechanochemical synthesis is a promising method for studying the size-dependent melting of metals if the size of the resulting metallic nanoparticles can be tuned effectively. Here, with Cu as an example, we show that tuning of particle sizes can be accomplished by extending the milling time at a high milling speed and following annealing of the milled samples. With the so prepared samples, the melting point depression of Cu nanoparticles and its size dependence are successfully investigated.     

Configuration of Parent-Reported and Adolescent-Perceived Career-Related Parenting Practice and Adolescents’ Career Development: A Person-Centered,Longitudinal Analysis of Chinese Parent–Adolescent Dyads

Journal of Child and Family Studies - Adolescents’ career development is associated with various contextual factors, among which career-related parenting practice is particularly important....     

消防武警新兵适应不良影响因素的中介效应模型

采用军人适应不良量表、核心自我评价量表、自我韧性量表、亲子关系问卷和军营联结问卷对435名消防武警新兵进行调查,考察了消防武警新兵适应不良的影响因素及其内在机制。结果发现：1）核心自我评价、韧性、亲子关系和军营联结与适应不良均显著负相关。2）韧性在核心自我评价与适应不良关系间起着部分中介作用,军营联结在核心自我评价、亲子关系与适应不良关系间起着部分中介作用。     

窗口大小、呈现速度和字号对引导式文本阅读的影响

使用EyeLink2000眼动仪,以30名大学生为被试,采用3（窗口大小：5字、10、15字）×2（呈现速度：300字/分、600字/分）×3（字号：24号、36号、48号）多因素混合设计,考察了窗口大小、呈现速度和字号对引导式文本阅读的影响。结果表明：（1）字号的主效应显著,字号越大,越有利于阅读;（2）呈现速度的主效应显著,慢速更有利于阅读;（3）呈现速度和字号的交互作用显著,慢速和中号、慢速和大号更有利于阅读。     

Consciousness of Social Face: the development and validation of a scale measuring desire to gain face versus fear of losing face

This article describes the development and validation of a scale that measures two distinct needs for individuals to manage their social "face". Scale development process resulted in an 11-item Consciousness of Social Face (CSF) scale made up of the following two correlated dimensions: desire to gain face and fear of losing face. The two-factor correlated structure of CSF scale was stable across multiple samples of both students and non-students subjects. The construct validity of CSF scale, including convergent validity, discriminant validity, and criterion-related validity was also demonstrated by examining relationships with other personality or demographical variables.