The nanofriction properties of hexagonal boron nitride (h-BN) are vital for its application as a substrate for graphene devices and solid lubricants in micro- and nano-electromechanical devices. In ...this work, the nanofriction characteristics of h-BN on Si/SiO
2
substrates with a bias voltage are explored using a conductive atomic force microscopy (AFM) tip sliding on the h-BN surface under different substrate bias voltages. The results show that the nanofriction on h-BN increases with an increase in the applied bias difference (
V
t−s
) between the conductive tip and the substrate. The nanofriction under negative
V
t−s
is larger than that under positive
V
t−s
. The variation in nanofriction is relevant to the electrostatic interaction caused by the charging effect. The electrostatic force between opposite charges localized on the conductive tip and at the SiO
2
/Si interface increases with an increase in
V
t−s
. Owing to the characteristics of p-type silicon, a positive
V
t−s
will first cause depletion of majority carriers, which results in a difference of nanofriction under positive and negative
V
t−s
. Our findings provide an approach for manipulating the nanofriction of 2D insulating material surfaces through an applied electric field, and are helpful for designing a substrate for graphene devices.
In this paper, the losses caused by earthquake and the damage brought to engineering structures are firstly introduced. Then, the types of seismic damage of such structures are introduced with ...reinforced concrete frame structure as an example. Next, the seismic design methods of structures in domestic and foreign codes are summarized, mainly including seismic measures and seismic structural measures, and the types and applications of seismic shock absorption technology are further introduced. Finally, the effectiveness of the seismic shock absorption technology is verified by using the passive control method as an example.
Abstract
Art and science and technology combine to create works, art is still its core, technology is a tool to achieve imagination. In the past, many ideas were shelved because of the limitation of ...technical conditions. Nowadays, the development of various technologies can meet the realization of more ideas. Technology expands the boundary of real space and even creates new spatial dimensions. Art leads technology, technology drives art. The application of multimedia technology makes the creation of dance more possible.
Abstract
With the change of people’s parenting concept, Chinese residents tend to let children sit in daily life, which will lead to the continuous decline of children’s physical health. Therefore, ...the detection rate of obesity and overweight of children in China continues to rise, which requires kindergartens to choose a more efficient physical exercise method. Through scientific physical health education, we can guide children to pay attention to physical exercise, which will help them acquire lifelong sports awareness and ability. At the same time, physical health education can promote children’s health, which is also the most effective measure. Therefore, some kindergartens have formed children’s physical education curriculum with the help of modern information technology, which will help children better develop their physical quality. However, some kindergartens also have some problems when introducing physical fitness courses, such as lack of experience, lack of understanding of concepts, curriculum confusion, etc., which will be difficult to fully reflect the development of physical fitness. First of all, this paper analyzes the impact of physical training on children. Then, this paper analyzes the problems of modern information technology. Finally, some suggestions are put forward.
Apply digital coding technology and badminton men's technical and tactical statistical analysis system to analyze men's doubles competition data, provide statistical results of the position and line ...of the hitting technique, perform relevant analysis of technical and tactical applications between the opponent and the opponent, and analyze historical events. In addition, the use of computer coding technology to analyze the data, for the athletes to formulate the battle plan before the game, provide effective basis for timely and targeted adjustment of technical and tactics, and make a comprehensive summary after the game.
The ubiquitous rhythm in competitive sports activities not only affects athletes' competitive style and performance, but also determines their performance to a certain extent. The research on the ...basic theory and empirical application of competition rhythm will help improve the athletes' cognitive level of competition activities. The analysis and elaboration of the basic theoretical problems of badminton competition rhythm based on computer association rules mining can solve many practical problems such as the application and control of badminton competition rhythm in sports training and competition, and establish badminton competition rhythm theory. In addition, it also has important research significance and value for the practical application of badminton.
Quality assessment of 3D images encounters more challenges than its 2D counterparts. Directly applying 2D image quality metrics is not the solution. In this paper, we propose a new full-reference ...quality assessment for stereoscopic images by learning binocular receptive field properties to be more in line with human visual perception. To be more specific, in the training phase, we learn a multiscale dictionary from the training database, so that the latent structure of images can be represented as a set of basis vectors. In the quality estimation phase, we compute sparse feature similarity index based on the estimated sparse coefficient vectors by considering their phase difference and amplitude difference, and compute global luminance similarity index by considering luminance changes. The final quality score is obtained by incorporating binocular combination based on sparse energy and sparse complexity. Experimental results on five public 3D image quality assessment databases demonstrate that in comparison with the most related existing methods, the devised algorithm achieves high consistency with subjective assessment.
The quality assessment of 3D images is more challenging than its 2D counterparts, and little investigation has been dedicated to blind quality assessment of stereoscopic images. In this letter, we ...propose a novel blind quality assessment for stereoscopic images based on binocular feature combination. The prominent contribution of this work is that we simplify the process of binocular quality prediction as monocular feature encoding and binocular feature combination. Experimental results on two publicly available 3D image quality assessment databases demonstrate the promising performance of the proposed method.
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