scholarly journals Evolution of the Electromagnetic Manipulation: From Tunable to Programmable and Intelligent Metasurfaces

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 988
Author(s):  
Sisi Luo ◽  
Jianjiao Hao ◽  
Fuju Ye ◽  
Jiaxin Li ◽  
Ying Ruan ◽  
...  
Keyword(s):  
Design Method ◽  
Three Dimensional ◽  
Physical World ◽  
New Era ◽  
The Past ◽  
Digital World ◽  
Low Profile ◽  
Working Principle ◽  
Basic Concepts ◽  
And Control

Looking back on the development of metamaterials in the past 20 years, metamaterials have gradually developed from three-dimensional complex electromagnetic structures to a two-dimensional metasurface with a low profile, during which a series of subversive achievements have been produced. The form of electromagnetic manipulation of the metasurface has evolved from passive to active tunable, programmable, and other dynamic and real-time controllable forms. In particular, the proposal of coding and programmable metasurfaces endows metasurfaces with new vitality. By describing metamaterials through binary code, the digital world and the physical world are connected, and the research of metasurfaces also steps into a new era of digitalization. However, the function switch of traditional programmable metamaterials cannot be achieved without human instruction and control. In order to achieve richer and more flexible function regulation and even higher level metasurface design, the intelligence of metamaterials is an important direction in its future development. In this paper, we review the development of tunable, programmable, and intelligent metasurfaces over the past 5 years, focusing on basic concepts, working principles, design methods, manufacturing, and experimental validation. Firstly, several manipulation modes of tunable metasurfaces are discussed; in particular, the metasurfaces based on temperature control, mechanical control, and electrical control are described in detail. It is demonstrated that the amplitude and phase responses can be flexibly manipulated by the tunable metasurfaces. Then, the concept, working principle, and design method of digital coding metasurfaces are briefly introduced. At the same time, we introduce the active programmable metasurfaces from the following aspects, such as structure, coding method, and three-dimensional far-field results, to show the excellent electromagnetic manipulation ability of programmable metasurfaces. Finally, the basic concepts and research status of intelligent metasurfaces are discussed in detail. Different from the previous programmable metamaterials, which must be controlled by human intervention, the new intelligent metamaterials control system will realize autonomous perception, autonomous decision-making, and even adaptive functional manipulation to a certain extent.

scholarly journals Midface Reconstruction: Planning and Outcome

2020 ◽  
Vol 53 (03) ◽  
pp. 324-334
Author(s):  
Gautam Biswas
Keyword(s):  
Digital Imaging ◽  
3D Structure ◽  
Three Dimensional ◽  
The Past ◽  
Complex Anatomy ◽  
Osseointegrated Implants ◽  
Low Profile ◽  
3D Printed ◽  
Midface Reconstruction ◽  
Reconstruction Planning

Abstract Reconstruction of the complex anatomy and aesthetics of the midface is often a challenge. A careful understanding of this three-dimensional (3D) structure is necessary. Anticipating the extent of excision and its planning following oncological resections is critical.In the past over two decades, with the advances in microsurgical procedures, contributions toward the reconstruction of this area have generated interest. Planning using digital imaging, 3D printed models, osseointegrated implants, and low-profile plates, has favorably impacted the outcome. However, there are still controversies in the management: to use single composite tissues versus multiple tissues; implants versus autografts; vascularized versus nonvascularized bone; prosthesis versus reconstruction.This article explores the present available options in maxillary reconstruction and outlines the approach in the management garnered from past publications and experiences.

Multi Mode Vibration Control and Broder Band Motion Control of Three Dimensional Shaking Table

2005 ◽  
Author(s):  
Tsunehiro Wakasugi ◽  
Toru Watanabe ◽  
Kazuto Seto
Keyword(s):  
Vibration Control ◽  
Controller Design ◽  
Design Method ◽  
Three Dimensional ◽  
Design Procedure ◽  
Equation System ◽  
State Equation ◽  
Shaking Table ◽  
Mode Vibration ◽  
And Control

This paper deals with a new system design method for motion and vibration control of a three-dimensional flexible shaking table. An integrated modeling and controller design procedure for flexible shaking table system is presented. An experimental three-dimensional shaking table is built. “Reduced-Order Physical Model” procedure is adopted. A state equation system model is composed and a feedback controller is designed by applying LQI control law to achieve simultaneous motion and vibration control. Adding a feedforward, two-degree-of-freedom control system is designed. Computer simulations and control experiments are carried out and the effectiveness of the presented procedure is investigated. The robustness of the system is also investigated.

scholarly journals CDA OF GUS IPUL’S POLITICAL ADVERTISING IN 2018-EAST-JAVA-REGIONAL ELECTION

2020 ◽  
Vol 12 (2) ◽  
pp. 261
Author(s):  
Moh Khoirul Anam ◽  
Nurhayati Nurhayati
Keyword(s):  
Critical Discourse Analysis ◽  
Service Providers ◽  
Three Dimensional ◽  
Political Advertising ◽  
Three Dimensional Model ◽  
Positive Information ◽  
Systemic Functional Grammar ◽  
The Past ◽  
Digital World ◽  
Textual Data

Recent campaign models tend to change from the traditional model which commonly happened in the past. If in the past the campaign was identical to speeches, flags, marches, etc., nowadays the campaign can be done by utilizing the digital world as a media, even though the old model is still used today in a fewer portion. Therefore, this study aims to analyze the digital campaign advertisement of Gus Ipul in East Java Election 2018. Using the Systemic Functional Grammar (SFG) theory and Critical Discourse Analysis (CDA) approach of Fairclough three-dimensional model, researchers want to reveal what message is behind the advertisements. The data in this study are five political campaign videos obtained from online video service providers, www.youtube.com. The videos are downloaded, then transcribed so that the textual data is obtained. These data are analyzed using the SFG theory. From the analysis, the results of the present study show that Gus Ipul’s political advertising is included in advocacy and contrasting advertising. Also, there are two objectives of Gus Ipul's political advertising. The first is to satire political opponents, and the second is to provide information. The information conveyed is by providing positive information, namely by using the lexicon like pengalaman - experience, paham - understanding and amanah -trustworthiness. From the political advertisement model, it can also be obtained that there are four strategies used in advertising viz emphasizing our good things, emphasizing their bad things, de-emphasizing our bad things, and de-emphasizing their good things.

scholarly journals Study on the Development Process and Improvement Countermeasures of Waste Classification in China

2021 ◽  
Vol 248 ◽  
pp. 02017
Author(s):  
XiaoJun Li ◽  
Ying Wang ◽  
Jin Xu
Keyword(s):  
Development Process ◽  
Health And Safety ◽  
Ecological Environment ◽  
Ecological Civilization ◽  
Domestic Waste ◽  
New Era ◽  
The Past ◽  
History Of ◽  
And Control ◽  
Public Health And Safety

In order to respond to the national ecological policy, to ensure the improvement of the urban ecological environment, the prevention and control of solid waste pollution, and the protection of public health and safety, the construction of ecological civilization is put in the primary development position. Therefore, the overall planning and reasonable deployment of the classified collection and treatment of urban domestic waste can effectively achieve the goal of secondary utilization of urban waste. The article has basically combed the history of garbage classification in my country, analyzed the problems existing in China garbage classification in the past, expounded the latest progress, and put forward some suggestions for the implementation of garbage classification in my country in the new era.

Dynamic Simulation and Control Strategy of Centrifugal Flying Shear

2009 ◽  
Vol 16-19 ◽  
pp. 278-282
Author(s):  
Jin Chun Song ◽  
Chang Zhou Wang ◽  
Dong Xu
Keyword(s):  
Dynamic Simulation ◽  
Control Strategy ◽  
Optimization Design ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Production Lines ◽  
Electronic Control System ◽  
Working Principle ◽  
Parameter Optimization Design ◽  
And Control

Centrifugal Flying Shear is one of the most advanced equipments, which is widely used in tandem mill production lines because of its simple structure and high shearing precision. In this paper, the working principle of the centrifugal flying shear was introduced; the three-dimensional model of the centrifugal flying shear was established; the structural analysis and the dynamic simulation of the flying shear, with the movement rule and trajectory, were made based on MATLAB/SimMechanics and Solidworks/COSMOS Motion; and the control strategy of realizing scale shearing was proposed. The results obtained provide theoretical basis for design of the electronic control system, and facilitate further analysis of the shearing process and parameter optimization design of similar flying shears.

Validity and Factor Structure of the Obsessive Compulsive Thoughts Checklist

1997 ◽  
Vol 25 (1) ◽  
pp. 51-66 ◽  
Author(s):  
Martine Bouvard ◽  
Jean Cottraux ◽  
Evelyne Mollard ◽  
Muriel Arthus ◽  
Stella Lachance ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Factor Structure ◽  
Convergent Validity ◽  
Three Dimensional ◽  
Control Group ◽  
Obsessive Compulsive ◽  
The Past ◽  
Obsessive Compulsive Disorders ◽  
And Control ◽  
Compulsive Disorders

The Obsessive Compulsive Thoughts Checklist (OCTC; Bouvard, Mollard, Cottraux, & Guerin 1989) is a 28 item questionnaire. Patients rate their degree of disturbance of the past week on a 5-point scale. The validation study and factor analysis of the OCTC is presented. Three groups were compared: patients suffering from obsessive compulsive disorders (n = 122), patients suffering from panic disorder with agoraphobia (n = 61) and a control group (n = 80). The three groups were comparable in age and sex. Obsessive compulsive patients scored significantly higher than both agoraphobic patients and control subjects. Spearman rank correlations were used to compute convergent validity in a sub-group of obsessive compulsive patients (n = 96). The Obsessive Compulsive Thoughts Checklist correlated positively with the Compulsive Activity Checklist (rho =. 62; p <. 0001). The total score was also positively correlated with the Yale-Brown Obsessive Compulsive Scale (YBOCS total scale: rho =. 42; p <. 0001; YBOCS obsession scale: rho =. 40; p <. 0001; YBOCS compulsion scale: rho. 37; p =. 0002). The factor structure was studied both on the sample which included agoraphobic patients and controls (n = 141) and on the obsessive compulsive patients only (n = 122). In both analyses, three identical factors were found: – factor 1: checking/perfectionism-orderliness – factor 2: responsibility/dread of harming others – factor 3: washing/contamination. Results support the validity and the internal consistency of the Obsessive Compulsive Thoughts Checklist. The factor analysis indicates that the OCTC is a three dimensional scale, reflecting a pathological need to check, a pathological sense of responsibility and a pathological need to wash, probably due to distorted thoughts about perfectionism and orderliness, an excessive need for control and fear of contamination.

scholarly journals Augmented Reality Implementations in Stomatology

2019 ◽  
Vol 9 (14) ◽  
pp. 2929 ◽  
Author(s):  
Aleš Procházka ◽  
Tatjana Dostálová ◽  
Magdaléna Kašparová ◽  
Oldřich Vyšata ◽  
Hana Charvátová ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Three Dimensional ◽  
3D Models ◽  
Plaster Cast ◽  
Physical World ◽  
Dental Arch ◽  
Morphological Operations ◽  
Digital World ◽  
Wide Range ◽  
Plaster Casts

Augmented reality has a wide range of applications in many areas that can extend the study of real objects into the digital world, including stomatology. Real dental objects that were previously examined using their plaster casts are often replaced by their digital models or three-dimensional (3D) prints in the cyber-physical world. This paper reviews a selection of digital methods that have been applied in dentistry, including the use of intra-oral scanning technology for data acquisition and evaluation of fundamental features of dental arches. The methodology includes the use of digital filters and morphological operations for spatial objects analysis, their registration, and evaluation of changes during the treatment of specific disorders. The results include 3D models of selected dental arch objects, which allow a comparison of their shape and position during repeated observations. The proposed methods present digital alternatives to the use of plaster casts for semiautomatic evaluation of dental arch measures. This paper describes some of the advantages of 3D digital technology replacing real world elements and plaster cast dental models in many areas of classical stomatology.

Simulation Analyzing for Spinner Institutions of Iron Roughneck Based on ADAMS

2014 ◽  
Vol 488-489 ◽  
pp. 1264-1267
Author(s):  
Xiao Ying Zhao
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Hydraulic Cylinder ◽  
Parameter Setting ◽  
Force Curve ◽  
Practical Action ◽  
Working Principle ◽  
Design Software ◽  
Set Up ◽  
And Control

The structure and working principle on Spinner institutions of iron roughneck are introduced. The stress analysis on Spinner institutions is done according to the theory of mechanics and the load formula of the hydraulic cylinder is obtained. Spinner model is set up using professional three-dimensional design software: Inventor, and imported into the ADAMS for simulation analysis, the clamping force curve of spinner institutions and stress value of the key components are obtained. The article verified the correctness of the system and provided theoretical basis for the parameter setting of the system practical action and control.

A Mixed Control System of 3D High Rise Benchmark Building Model Based on Genetic Algorithm

2010 ◽  
Vol 163-167 ◽  
pp. 2862-2867
Author(s):  
Jian Lin Zhang ◽  
Zhi Hong ◽  
Qian Lin ◽  
Jie Sheng Jiang
Keyword(s):  
Genetic Algorithm ◽  
Control System ◽  
Passive Control ◽  
Design Method ◽  
Three Dimensional ◽  
Control Effect ◽  
Building Model ◽  
Mixed Control ◽  
Damper Control ◽  
And Control

In the former research, the Damper control system, TMD control system and the Mixed Control of the active control and passive control were all optimized alone. It is found that less research of the optimization is on the Mixed Control of the Damper system and TMD system. In order to achieve better control effect, we venture to propose a Mixed Control system of third-generation three-dimensional 20-storey Benchmark model under the multi-directional earthquake in this paper. By means of Rayleigh damping and D-value, dynamic equations including the damping matrixes, stiffness matrixes of the structure are obtained. Then in the process of the optimization, the displacement reducing coefficient (DRF) is used as the objective function to optimize the placement of damping devices and control parameters based on Genetic Algorithm (GA). Numerical results in this paper show that the optimal design method proposed in this paper is effective and flexible. It can obviously reduce the seismic responses of building structure.

scholarly journals Implementation of Min Max Algorithm as Intelligent Agent on Card Battle Game

2019 ◽  
Vol 2 (2) ◽  
pp. 53 ◽  
Author(s):  
Silvester Dian Handy Permana
Keyword(s):  
Information Technology ◽  
Intelligent Agent ◽  
Physical World ◽  
The Past ◽  
Digital World ◽  
Physical Objects ◽  
Special Algorithm

Information technology brings transformation from the physical world into the digital world. This transformation developed in various fields, especially games. In the past, games that are involving physical objects such as chess, cards, dominoes, and mahjong are popular for the publics. Card battle game is a game that pits strength between 2 cards. The game must have 2 players who will compete. However, if a player wants to practice before the match or wants to play alone, he needs Non Player Character (NPC). The NPC will be the opponent in card battle games. In order for NPCs to be able to fight players, a special algorithm is needed to make the NPCs compete with players. The algorithm that can be implemented into the NPC is the Min Max Algorithm. This algorithm is a responsive algorithm which can count every step of the player. The results of this study are expected to provide suitable opponents for players who want to practice or compete in Card Battle Game on their own.

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