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Image processing algorithms are essential for clarifying the image and improving the ability to recognize distinct characteristics of the image. The field of digital image processing is widespread in several research and technology applications. In many of these applications, the existence of impulsive noise in the obtained images is one of the most frequent problems. The median filter is a strong method to remove the impulsive noise; it effectively eliminates salt and pepper noise from the image. The main target of this paper is to investigate efficient median filter units to be connected to a general-purpose processor (GPP) for FPGA-based embedded systems. The paper exposes three novel techniques, two of them specially for median filtering techniques and the third one is used to g... |
Classic generalized rough set model in neighborhood systems provides a more general framework for depicting approximations, while it may meet the non-reflexive situations. Some scholars put forward different neighborhoods, such as adhesion neighborhoods (briefly, Pj
-neighborhoods), containment neighborhoods (briefly, Cj
-neighborhoods), and Ej
-neighborhoods. However, not all of them are reflexive. Moreover, the granularity of Pj
-neighborhoods and Cj
-neighborhoods are too fine, and that of Ej
-neighborhoods too coarse. To solve the problem, we aim to design a novel construction approach of neighborhoods, called variable j-containment neighborhoods (briefly, Vβj
-neighborhoods), which satisfies the reflexivity and the granularity so flexible that the neighborhood space can ... |
Wide-bandgap (WBG) perovskites have been attracting much attention because of their immense potential as a front light-absorber for tandem solar cells. However, WBG perovskite solar cells (PSCs) generally exhibit undesired large open-circuit voltage (VOC) loss due to light-induced phase segregation and severe non-radiative recombination loss. Herein, antimony potassium tartrate (APTA) is added to perovskite precursor as a multifunctional additive that not only coordinates with unbonded lead but also inhibits the migration of halogen in perovskite, which results in suppressed non-radiative recombination, inhibited phase segregation and better band energy alignment. |
In this work, we study the development of the internal boundary layer (IBL) induced by a surface roughness discontinuity, where the downstream surface has a roughness length greater than that upstream. The work is carried out in the EnFlo meteorological wind tunnel, at the University of Surrey, in both thermally neutral and stable cases with varying degrees of stability. For the neutrally-stratified boundary layer, the IBL development in the log-law region shows good agreement with the diffusion model proposed by Panofsky and Dutton (Atmospheric turbulence, Wiley, New York, 1984) provided that a modified origin condition is introduced and its growth rate is dictated by a constant diffusion term. However, the model over-predicts the growth of the IBL in the outer layer, where the IBL... |
This study explores the impact of appearance and speech on human perceptions of faces in human- robot interactions. Three videos were generated depicting the real face of an artist and two virtual versions of the same artist, with increasing resolution and fidelity. Each video was presented with and without speech, with matching levels of fidelity to the faces (real human speech and machine- generated speech of two levels of realism). Participants viewed all six videos and rated them on measures such as convincing, trustworthy, realistic, likable, showed biological movement, reassuring, friendly, familiar, and humanness. We found that the inclusion of speech (real) had a significant positive impact on the impression formation of real human appearance. In contrast, perceptions of the... |
The floodplain area in the lower Yellow River plays the function of flood detention and undertakes the production and living functions of residents. Because the Yellow River basin is one of the most serious flooding areas in China, the Yellow River seriously threatens the safety of people’s lives and property and social stability and development in the floodplain area. It is significant to carry out flood inundation dynamic analysis and flood loss assessment in the lower Yellow River. Taking the zonal flood detention of the Jiahetan-Gaocun section as an example, a two-dimensional flow mathematical model is established by using MIKE 21. Through the numerical simulation of flood routing during the flood detention operation, the flood detention effect of the floodplain area is analysed... |
This paper proposes a new multi-level spring restrainer (MLSR) that exhibits multi stiffness performance in different levels of movement of bridge superstructure to prevent unseating during applied dynamic loads. The analytical model of the proposed MLSR was formulated and the fabricated prototype was tested using dynamic actuator. Based on the developed analytical mode, the function of MLSR device relied on 12 parameters that further complicated the design process to achieve the best performance. However, the conventional optimization techniques utilized only one or a few factors for simple systems. Therefore, a multi-objective optimization method is proposed in this study by introducing the hybridization of Particle Swarm Optimization and Gravitational Search algorithm (PSOGSA) to... |
Okara protein (OP) was extracted by alkali solution and acid-isolation method using bean dregs as raw materials. With OP as the main raw material, the mixed gelatin and modified starch as the gelling agent, xylitol as the sweetener, and buffered lactic acid as the sour agent, the elasticity, hardness, stickiness and chewiness of the texture analyzer were analyzed by the single-factor test and orthogonal test. Combined with sensory evaluation, the optimal formula for the preparation of OP gel gummies was comprehensively obtained as: the ratio of gelatin to modified starch was 9:1; the xylitol addition was 18 g; the addition of buffered lactic acid was 0.7mL, and the addition of OP solution was 16mL, respectively. The gel gummies prepared under this formula have the advantages of suit... |
To improve the technical level of human motion posture and health estimation, a human motion posture and health estimation algorithm based on Nano biosensor and improved deep learning is proposed. First, we use Nano biological acceleration sensor and Nano biological angular velocity sensor to obtain human motion posture and health data. Second, after the fusion processing of human motion posture and health data, we use the motion posture coordinate system conversion unit and the physiological information recognition unit to convert the coordinate system of human motion angular velocity and acceleration data and recognize the physiological information of blood pressure and heart rhythm. Finally, the convolution neural networks (CNN) in deep learning is improved to obtain the deformab... |
The number of steps by an individual, has traditionally been assessed with a pedometer, but increasingly with an accelerometer. The ActiLife software (AL) is the most common way to process accelerometer data to steps, but it is not open source which could aid understanding of measurement errors. The aim of this study was to compare assessment of steps from the open-source algorithm part of the GGIR package and two closed algorithms, AL normal (n) and low frequency extension (lfe) algorithms to Yamax pedometer, as reference. Free-living in healthy adults with a wide range of activity level was studied. |
