Vibration separation of multiple mixed particle curves based on image recognition and machine learning

2021 ◽  
pp. 1-13
Author(s):  
Zhou Yanyan
Keyword(s):  
Particle Physics ◽  
Granular Matter ◽  
Particle Separation ◽  
Internal Force ◽  
Research Field ◽  
Systematic Research ◽  
Gradual Improvement ◽  
System A ◽  
Combined Action ◽  
Motion Characteristics

The motion characteristics of particulate matter are very wonderful. With the development of science and technology, the motion of granular materials has gradually become a hot topic, which has attracted the attention of many scientists and experts. The research of granular matter has gradually become specialized and systematic. With the gradual improvement of the system, a frontier research field particle physics has been formed. Under the combined action of external force and internal force, particles can reflect the properties of fluid, but in the process of flow, it will show different size separation phenomenon from the fluid. The problem of particle separation was formally introduced into the field of physics in 1987. In reality, the existence of particles is not unique. In view of this, the author makes a systematic research and Analysis on the behavior and factors of vibration.

The Calculation of Landslide-Thrust Based on Reliability Theory

2012 ◽  
Vol 226-228 ◽  
pp. 1293-1296 ◽  
Author(s):  
Ying Xiang Wu ◽  
Dong Sheng Liu ◽  
Lei Wang ◽  
Qian Xin
Keyword(s):  
Failure Surface ◽  
Internal Force ◽  
Reliability Theory ◽  
Retaining Structure ◽  
Distribution Form ◽  
Thrust Distribution ◽  
Calculation Results ◽  
Combined Action ◽  
Current Engineering

For current engineering of anti-slide piles, many problems exist in the calculation of landslide-thrust. Therefore, a new method based on the reliability theory combined with strength reduction FEM is introduced, and the landslide-thrust acting on anti-slide pile is researched here. In this method, the safety factor of slope can be caculated without assuming the shape and position of failure surface beforehand, the randomness of physical and mechanical parameters of slope are introduced, and the combined action of retaining structure and rock mass is considered. Meanwhile, the thrust distribution form and structural internal force can be calculated, which are also probabilistic. A case study shows that the calculation results are more reasonable and the applicability of proposed method is clearly dependable in calculating the landslide thrust.

scholarly journals Image-Based Virtual Try-on System: A Survey of Deep Learning-Based Methods

2021 ◽  
Author(s):  
Hajer Ghodhbani ◽  
Adel Alimi ◽  
Mohamed Neji
Keyword(s):  
Deep Learning ◽  
Literature Review ◽  
Research Field ◽  
Future Research ◽  
Fashion Industry ◽  
Research Directions ◽  
System A ◽  
Comprehensive Literature Review ◽  
Benchmark Datasets ◽  
Future Research Directions

<p>Our work aims to conduct a comprehensive literature review of deep learning methods applied in the fashion industry and, especially, the image-based virtual fitting task by citing research works published in the last years. We have summarized their challenges, their main frameworks, the popular benchmark datasets, and the different evaluation metrics. Also, some promising future research directions are discussed to propose improvements in this research field.</p>

Functional Quantum Theory of Scattering Processes. III

1971 ◽  
Vol 26 (10) ◽  
pp. 1723-1729 ◽  
Author(s):  
H. Stumpf ◽  
W. Engeser ◽  
K. Illig
Keyword(s):  
Quantum Theory ◽  
Particle Physics ◽  
Functional Equations ◽  
Quantum Field ◽  
Elementary Particle Physics ◽  
System A ◽  
S Matrix ◽  
The Matrix ◽  
Physical Information ◽  
Operator Representations

Abstract Dynamics of quantum field theory can be formulated by functional equations. To develop a complete functional quantum theory one has to describe the physical information by functional operations only. The most important physical information of elementary particle physics is the matrix. In this paper the functional S-matrix is constructed for nonrelativistic spin 1/2 fermions, as in this system a rigorous construction of operator representations is possible. The method of S-matrix derivation used in I and II is improved and the exact perturbation solution for the scattering functionals is given.

Establishing and Consolidating a Research Field

2019 ◽  
Vol 49 (2) ◽  
pp. 117-150
Author(s):  
Eugenio Bertozzi
Keyword(s):  
Particle Physics ◽  
History Of Physics ◽  
Research Field ◽  
Cloud Chamber ◽  
Particle Accelerator ◽  
Late Nineteenth Century ◽  
New Knowledge ◽  
History Of ◽  
Tight Connection ◽  
The 1960S

This paper retraces the biography of a milestone instrument in the history of physics—the cloud chamber—introduced by Charles Thomson Rees Wilson in 1911 and vastly adopted in successive studies on particle physics. It offers a comprehensive reading where the development of the instrument is kept in tight connection with the knowledge of microphysics from the late nineteenth century to the 1960s: it shows how the inception of the Wilson instrument of 1911, even in its smallest constructive details, can be seen as strongly influenced by the physics discoveries through the nineteenth and the beginning of the twentieth centuries. The confirmation of preliminary observations obtained with early versions of the cloud chamber drove, as in the case of the positron, further evolutions of the instrument into a “golden age” of the apparatus within particle physics research. The “sunset” will see the attempt to overcome the limitations of a fully developed apparatus by flexibly intervening in the geometry of the experiment, moving it up to the mountains or at different distances from the particle accelerator by stressing at maximum, and then exhausting, the generation of new knowledge from it. In doing so, the paper brings into light original aspects not yet explored in historical studies on the cloud chamber, such as Wilson’s contribution to the field after 1911.

scholarly journals Ultrasound-driven Curveball in Table Tennis

2021 ◽  
Vol 5 (ISS) ◽  
pp. 1-20
Author(s):  
Tao Morisaki ◽  
Ryoma Mori ◽  
Ryosuke Mori ◽  
Kohki Serizawa ◽  
Yasutoshi Makino ◽  
...  
Keyword(s):  
User Study ◽  
Research Field ◽  
Table Tennis ◽  
Tennis Players ◽  
Concept System ◽  
Remote Manipulation ◽  
System A ◽  
Ping Pong ◽  
Specific Device ◽  
Physical Abilities

Augmented Human (AH) is a research field enhancing human physical abilities or supporting human activity using advanced technologies. As one of the AH approaches, previous studies have attached an actuator to a human body or tools used for an activity. The attached actuators are used to control their movements to support an activity. In this study, instead of attaching actuators, we propose to directly apply noncontact ultrasound force to a lightweight tool to manipulate it. The advantage of using noncontact force is that users do not need to wear a specific device and to process tools used for the activity. As a proof-of-concept system, we developed an ultrasound-based curveball system by which table tennis players can shoot a curveball regardless of their physical ability. In the system, a moving ping-pong ball (PPB) is a target tool for remote manipulation. The system curves the trajectory of a moving PPB by continuously focusing ultrasound on it. Users can control the curve timing and the curve direction (left or right) using a racket-shaped controller. In the user study, we conducted an actual table tennis match using the curveball system and qualitatively confirmed that the player using the system had the upper hand. Another user study using a ball dispenser quantitatively showed that the ultrasound-driven curveball increased the number of mistakes of the opponent player 2.95 times. These results indicate that the proposed concept is feasible.

scholarly journals Progress and implications of international rural space research

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Dan Wang ◽  
Zuyun Liu
Keyword(s):  
International Research ◽  
Social Space ◽  
Dimensional Space ◽  
Theoretical Perspective ◽  
Research Literature ◽  
Research Field ◽  
Social Representation ◽  
Space Research ◽  
Systematic Research ◽  
Rural Space

Space is a product of society. Driven by industrialization, urbanization, informatization and government policies, China’s rural space is undergoing drastic reconstruction. As one of the core contents of international rural geography research, rural space research are multi-disciplinary, multi perspective, multi-dimensional and multi-method, forming a rich research field. In order to comprehensively grasp the progress of rural space research abroad, this study reviewed international rural space research literature in recent 40 years. The study found that foreign scholars described the connotation of rural space from the aspects of material, imagination and practice, emphasize the importance of daily life practice. It introduced living space to construct a more systematic research framework of rural space by establishing a “three-fold model of rural space”. With regard to the theoretical perspective, international research on rural space has experienced three stages: functionalism, political economics and social constructivism. In the evolution of time, it has realized the transformation from productivism to post-productivism; in the spatial dimension, it realizes the multiple superposition of settlement space, economic space, social space and cultural space. As a whole, international research on rural space has realized the transformation from material level to social representation, from objective space to subjective space, and from static one-dimensional space to dynamic multi-dimensional space, which enlightens us on the importance of interdisciplinary research and “social cultural” research on rural space. The construction of rural space in China needs to pay attention to the subject status of farmers and multifunction of rural space, respect the role of locality and difference of various places, and recover the function of production of meaning of rural space.

Parametric Modeling of Five Typical Cylindrical Shells

2012 ◽  
Vol 424-425 ◽  
pp. 255-259 ◽  
Author(s):  
Xiao Yang Lu ◽  
Xiao Wei Zhao ◽  
Li Li Huang ◽  
Zheng Hui Li ◽  
Zhi Dan Wang ◽  
...  
Keyword(s):  
Cylindrical Shell ◽  
Parametric Design ◽  
Internal Force ◽  
Parametric Modeling ◽  
Shell Structures ◽  
Design Language ◽  
System A ◽  
Cylindrical Coordinate ◽  
High Length ◽  
Ansys Parametric Design Language

Based on the geometric characteristics of five typical cylindrical shell structures, a method of the node generation and element connection of the reticulated shell is established in the cylindrical coordinate system. A macro program is designed by using its own Parametric Design Language APDL (ANSYS Parametric Design Language) based on the platform of ANSYS. This five typical cylindrical shell modeling are realized under given parametric conditions such as span, rise high, length and number of grids. It is proved by several examples that this method is simple, efficient and possible. It can be easily used to analysis the internal force and optimize design in shell structures

Parametric Modeling of Six Typical Double Primary Ribs Reticulated Dome

2012 ◽  
Vol 166-169 ◽  
pp. 747-751
Author(s):  
Xiao Yang Lu ◽  
Wang Chao ◽  
Shi Ying Chen ◽  
Zhi Dan Wang
Keyword(s):  
Radial Direction ◽  
Parametric Design ◽  
Internal Force ◽  
Parametric Modeling ◽  
Shell Structures ◽  
Optimized Design ◽  
Spherical Coordinate ◽  
System A ◽  
Reticulated Domes ◽  
Ansys Parametric Design Language

Based on the structure features of double primary ribs reticulated domes, a method for node generation and element connection of six typical double primary ribs reticulated domes was produced in spherical coordinate system. A macro program was designed by using ANSYS Parametric Design Language (APDL). This six typical double primary ribs reticulated dome modeling was realized under given parameters such as span, rise high, double primary ribs thickness, grid number in circular and radial direction. It is proved by several examples that this method is simple, efficient and possible. It can be easily used to analyze the internal force and optimized design in shell structures.

Automated Optimal Design for Manufacturability of Sheet/Plate Assemblies

2005 ◽  
Author(s):  
Sorin Guidea ◽  
T. J. Nye
Keyword(s):  
Raw Materials ◽  
Weight Ratio ◽  
Research Field ◽  
Raw Material ◽  
Manufacturing Cost ◽  
Product Model ◽  
Packing Problems ◽  
Cad System ◽  
System A ◽  
Part Dimension

A wide variety of products are manufactured from raw materials that are in the form of sheets or plates. Once the product is designed, parts are unfolded or flattened into flat blanks, which are nested onto the raw material for cutting. Optimization of nesting and packing problems has been an active research field for many years, and many good algorithms have been created. These algorithms have a fundamental limitation, however, in that they assume the set of blanks to be nested is fixed. In this work we relax this assumption, and by linking a parametric CAD system, a part-unfolding module and a sheet-nesting module that all intercommunicate, nests are created which maintain the parametric dimensions of the assembled product. Given a nest of the set of required blanks, dimensions of the blanks are optimized for a particular objective, such as maximizing raw material utilization or minimizing total use of raw material, subject to assembly, part dimension, part and blank dimension constraints. Once optimized, these blank dimensions are returned to the CAD system to update the product model. Through the use of this system, a designer can simultaneously optimize all the dimensions within a product to minimize manufacturing costs early in the design phase while maintaining acceptable product performance. This paper will demonstrate a prototype of this DFM system, discuss issues such as performance improvement through randomized trials, and suggest how additional design objectives (e.g., strength to weight ratio, stiffness, etc.) can be integrated with the reduced manufacturing cost objective.

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