Toward a low cost and high performance MPC: The role of system identification

2013 ◽  
Vol 51 ◽  
pp. 124-135 ◽  
Author(s):  
Yucai Zhu ◽  
Rohit Patwardhan ◽  
Stephen B. Wagner ◽  
Jun Zhao
Keyword(s):  
System Identification ◽  
High Performance ◽  
Low Cost

scholarly journals Towards a Glass New World: The Role of Ion-Exchange in Modern Technology

2021 ◽  
Vol 11 (10) ◽  
pp. 4610
Author(s):  
Simone Berneschi ◽  
Giancarlo C. Righini ◽  
Stefano Pelli
Keyword(s):  
Ion Exchange ◽  
Communication Networks ◽  
High Speed ◽  
High Performance ◽  
Low Cost ◽  
Modern Technology ◽  
Historical Background ◽  
Wide Range ◽  
Happy Marriage

Glasses, in their different forms and compositions, have special properties that are not found in other materials. The combination of transparency and hardness at room temperature, combined with a suitable mechanical strength and excellent chemical durability, makes this material indispensable for many applications in different technological fields (as, for instance, the optical fibres which constitute the physical carrier for high-speed communication networks as well as the transducer for a wide range of high-performance sensors). For its part, ion-exchange from molten salts is a well-established, low-cost technology capable of modifying the chemical-physical properties of glass. The synergy between ion-exchange and glass has always been a happy marriage, from its ancient historical background for the realisation of wonderful artefacts, to the discovery of novel and fascinating solutions for modern technology (e.g., integrated optics). Getting inspiration from some hot topics related to the application context of this technique, the goal of this critical review is to show how ion-exchange in glass, far from being an obsolete process, can still have an important impact in everyday life, both at a merely commercial level as well as at that of frontier research.

Key role of milling in the optimization of TiO2 nanoinks

2006 ◽  
Vol 21 (6) ◽  
pp. 1561-1569 ◽  
Author(s):  
A. Sanson ◽  
D. Gardini ◽  
G. Montanari ◽  
C. Galassi ◽  
E. Roncari
Keyword(s):  
Rheological Properties ◽  
High Performance ◽  
Screen Printing ◽  
Low Cost ◽  
Intermediate Stage ◽  
Roll Mill ◽  
Transient Network ◽  
Deposited Film

Nanostructured films of TiO2 are becoming more and more attractive as a consequence of their improved sensing properties. Screen printing represents an important low-cost alternative for the production of high-performance devices for the automotive industry. However, to obtain films with superior properties, the composition and each step of the ink production must be carefully controlled. Milling strongly influences the rheological properties of the ink and, as a consequence, the quality of the deposited film. The as-prepared ink was homogenized in a four steps-process with a three-roll mill, and the rheological properties at each intermediate stage were measured. The results showed the dramatic effect of the milling on the flow properties of the nanoink and suggested the importance of a careful control of this step. The rheological behavior of the inks was explained using the basic idea of the transient network theory (TNT) for physically cross-linked networks of polymer solutions. Only an optimized cycle of milling can assure the necessary reproducibility of the ink properties as well as their time stability.

scholarly journals Virtual Torque Sensor for Low-Cost RC Servo Motors Based on Dynamic System Identification Utilizing Parametric Constraints

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3856 ◽  
Author(s):  
Yoonkyu Hwang ◽  
Yuki Minami ◽  
Masato Ishikawa
Keyword(s):  
System Identification ◽  
High Performance ◽  
Dynamic Models ◽  
Low Cost ◽  
Human Robot Interaction ◽  
Robot Dynamics ◽  
Internal Dynamic ◽  
Torque Sensor ◽  
Virtual Sensor ◽  
Effective Manner

We propose a novel virtual torque sensor for commercial low-cost radio-controlled (RC) servo motors. The virtual torque sensor has played an important role for conventional robots. It has been used for torque-required control applications such as human–robot interaction and under-actuated robots. However, most virtual torque sensors are based on the inversion of actuators or robot dynamics with the assumption that entire dynamics are known. This is not applicable to the RC servo motors that have unknown control structures. As RC servo motors enable researchers and hobbyists to create lightweight but high performance robots in an easy and cost-effective manner, the development of a virtual torque sensor for these motors is necessary. In this study, we propose a design method of a virtual torque sensor for RC servo motors. First, the virtual sensor is derived mathematically based on internal dynamic models with parametric constraints and compared to the conventional model. Second, a dedicated system identification method is developed for the proposed virtual sensor to implement the sensor in actual experiments. Finally, we compare experimental results with the measurements obtained by an actual sensor.

Modelling high performance potassium-ion battery anode materials with two-dimensional vanadium carbide MXene: the role of surface O- and S-terminations

2021 ◽  
Vol 23 (6) ◽  
pp. 3898-3904
Author(s):  
Shifeng Wang ◽  
Yatong Wang ◽  
Qianyu Zhou ◽  
Xin Li ◽  
Yong Li ◽  
...  
Keyword(s):  
Anode Materials ◽  
High Performance ◽  
Vanadium Carbide ◽  
Low Cost ◽  
Potassium Ion ◽  
Element Abundance ◽  
Two Dimensional ◽  
Battery Anode ◽  
Intrinsic Safety

Due to the low cost, high element abundance and intrinsic safety, potassium-ion batteries (KIBs) have attracted a surge of interest in recent years. Here, 2D O- and S-terminated V2C MXene anode materials are designed to model high performance KIBs.

scholarly journals Innovative low-cost strategy and firm performance of restaurants

2019 ◽  
Vol 13 (3) ◽  
pp. 266-281 ◽  
Author(s):  
Collins Kankam-Kwarteng ◽  
Barbara Osman ◽  
Jacob Donkor
Keyword(s):  
Firm Performance ◽  
High Performance ◽  
Low Cost ◽  
Competitive Intensity ◽  
Content Type ◽  
Interaction Terms ◽  
Cost Strategy ◽  
Low Cost Strategy ◽  
The Relationship

Purpose The purpose of this paper is to improve the appreciation of the moderating role of competitive intensity on the relationship between low-cost strategy and firm performance of restaurants. Design/methodology/approach The study uses empirical data collected from 118 restaurants operators, Ghana. The effects of relationships and the interaction of low-cost strategy and competitive intensity were tested using regression analysis. Findings The findings indicate the existence of a significant positive relationship between low-cost strategy and firm performance. The effect of competitive strategy on firm performance was found to be partially significant. The findings revealed that competitive intensity does moderate the relationship between low-cost strategy and firm performance of restaurants. Practical implications Implications of the findings for restaurant operators suggest that effective application of low-cost strategy and monitoring and managing competitive intensity results in high performance. Originality/value This study contributes to the existing literature on low-cost strategy, competitive intensity and firm performance. More specifically, the interaction terms of low-cost strategy and competitive intensity have been explored in this study and can be used for further investigations.

scholarly journals Study of the Absorption of Electromagnetic Radiation by 3D, Vacuum-Packaged, Nano-Machined CMOS Transistors for Uncooled IR Sensing

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 563
Author(s):  
Gil Cherniak ◽  
Moshe Avraham ◽  
Sharon Bar-Lev ◽  
Gady Golan ◽  
Yael Nemirovsky
Keyword(s):  
Electromagnetic Radiation ◽  
High Performance ◽  
Low Cost ◽  
Thin Layers ◽  
Machining Process ◽  
Wafer Level ◽  
Sensing Element ◽  
Cmos Transistor ◽  
High Absorption Coefficient

There is an ongoing effort to fabricate miniature, low-cost, and sensitive thermal sensors for domestic and industrial uses. This paper presents a miniature thermal sensor (dubbed TMOS) that is fabricated in advanced CMOS FABs, where the micromachined CMOS-SOI transistor, implemented with a 130-nm technology node, acts as a sensing element. This study puts emphasis on the study of electromagnetic absorption via the vacuum-packaged TMOS and how to optimize it. The regular CMOS transistor is transformed to a high-performance sensor by the micro- or nano-machining process that releases it from the silicon substrate by wafer-level processing and vacuum packaging. Since the TMOS is processed in a CMOS-SOI FAB and is comprised of multiple thin layers that follow strict FAB design rules, the absorbed electromagnetic radiation cannot be modeled accurately and a simulation tool is required. This paper presents modeling and simulations based on the LUMERICAL software package of the vacuum-packaged TMOS. A very high absorption coefficient may be achieved by understanding the physics, as well as the role of each layer.

Trace nanoanalysis

1994 ◽  
Vol 52 ◽  
pp. 940-941
Author(s):  
D. E. Newbury ◽  
R. D. Leapman
Keyword(s):  
High Performance ◽  
Secondary Ion Mass Spectrometry ◽  
Detection Efficiency ◽  
Volume Element ◽  
And Performance ◽  
Trace Constituents ◽  
Secondary Ion ◽  
Concentration Levels ◽  
Structure Properties

Trace constituents, which can be very loosely defined as those present at concentration levels below 1 percent, often exert influence on structure, properties, and performance far greater than what might be estimated from their proportion alone. Defining the role of trace constituents in the microstructure, or indeed even determining their location, makes great demands on the available array of microanalytical tools. These demands become increasingly more challenging as the dimensions of the volume element to be probed become smaller. For example, a cubic volume element of silicon with an edge dimension of 1 micrometer contains approximately 5×1010 atoms. High performance secondary ion mass spectrometry (SIMS) can be used to measure trace constituents to levels of hundreds of parts per billion from such a volume element (e. g., detection of at least 100 atoms to give 10% reproducibility with an overall detection efficiency of 1%, considering ionization, transmission, and counting).

Two Short Tests Fail to Detect Vigilance Decrements

2001 ◽  
Vol 17 (1) ◽  
pp. 48-55 ◽  
Author(s):  
Juan Botella ◽  
María José Contreras ◽  
Pei-Chun Shih ◽  
Víctor Rubio
Keyword(s):  
Individual Differences ◽  
High Performance ◽  
Selection Process ◽  
Vigilance Task ◽  
Air Traffic Controllers ◽  
Job Selection ◽  
Performance Deterioration ◽  
Short Test ◽  
Psychological Dimensions

Summary: Deterioration in performance associated with decreased ability to sustain attention may be found in long and tedious task sessions. The necessity for assessing a number of psychological dimensions in a single session often demands “short” tests capable of assessing individual differences in abilities such as vigilance and maintenance of high performance levels. In the present paper two tasks were selected as candidates for playing this role, the Abbreviated Vigilance Task (AVT) by Temple, Warm, Dember, LaGrange and Matthews (1996) and the Continuous Attention Test (CAT) by Tiplady (1992) . However, when applied to a sample of 829 candidates in a job-selection process for air-traffic controllers, neither of them showed discriminative capacity. In a second study, an extended version of the CAT was applied to a similar sample of 667 subjects, but also proved incapable of properly detecting individual differences. In short, at least in a selection context such as that studied here, neither of the tasks appeared appropriate for playing the role of a “short” test for discriminating individual differences in performance deterioration in sustained attention.

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