scholarly journals PRACTICAL DESIGN GUIDELINES FOR PSEUDO STARIN HARDENING CEMENTITIOUS COMPOSITES REINFORCED WITH SHORT RANDOM FIBERS : Part 2 Practical design Criteria to achieve saturated multiple cracking

2002 ◽  
Vol 67 (552) ◽  
pp. 13-21 ◽  
Author(s):  
Tetsushi KANDA ◽  
Victor C. LI
Keyword(s):  
Design Guidelines ◽  
Design Criteria ◽  
Cementitious Composites ◽  
Multiple Cracking ◽  
Practical Design

scholarly journals Design Criteria of Soft Exogloves for Hand Rehabilitation-Assistance Tasks

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Juana-Mariel Dávila-Vilchis ◽  
Juan C. Ávila-Vilchis ◽  
Adriana H. Vilchis-González ◽  
LAZ-Avilés
Keyword(s):  
Control Strategy ◽  
Degrees Of Freedom ◽  
Design Guidelines ◽  
Design Criteria ◽  
Hand Rehabilitation ◽  
Specific Design ◽  
Usability Criteria ◽  
Functional Task ◽  
Force Pressure ◽  
Weight Force

This paper establishes design criteria for soft exogloves (SEG) to be used as rehabilitation or assistance devices. This research consists in identifying, selecting, and grouping SEG features based on the analysis of 91 systems that have been proposed during the last decade. Thus, function, mobility, and usability criteria are defined and explicitly discussed to highlight SEG design guidelines. Additionally, this study provides a detailed description of each system that was analysed including application, functional task, palm design, actuation type, assistance mode, degrees of freedom (DOF), target fingers, motions, material, weight, force, pressure (only for fluids), control strategy, and assessment. Such characteristics have been reported according to specific design methodologies and operating principles. Technological trends are contemplated in this contribution with emphasis on SEG design opportunity areas. In this review, suggestions, limitations, and implications are also discussed in order to enhance future SEG developments aimed at stroke survivors or people with hand disabilities.

Applying Combined Pinch and Exergy Analysis to Closed-Cycle Gas Turbine System Design

1995 ◽  
Vol 117 (1) ◽  
pp. 47-52 ◽  
Author(s):  
V. R. Dhole ◽  
J. P. Zheng
Keyword(s):  
Power Systems ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Exergy Analysis ◽  
Energy Savings ◽  
Design Guidelines ◽  
Closed Cycle ◽  
Practical Design ◽  
Pinch Technology

Pinch technology has developed into a powerful tool for thermodynamic analysis of chemical processes and associated utilities, resulting in significant energy savings. Conventional pinch analysis identifies the most economical energy consumption in terms of heat loads and provides practical design guidelines to achieve this. However, in analyzing systems involving heat and power, for example, steam and gas turbines, etc., pure heat load analysis is insufficient. Exergy analysis, on the other hand, provides a tool for heat and power analysis, although at times it does not provide clear practical design guidelines. An appropriate combination of pinch and exergy analysis can provide practical methodology for the analysis of heat and power systems. The methodology has been successfully applied to refrigeration systems. This paper introduces the application of a combined pinch and exergy approach to commercial power plants with a demonstration example of a closed-cycle gas turbine (CCGT) system. Efficiency improvement of about 0.82 percent (50.2 to 51.02 percent) can be obtained by application of the new approach. More importantly, the approach can be used as an analysis and screening tool for the various design improvements and is generally applicable to any commercial power generation facility.

Practical design criteria for a dynamic ratio imaging system

Cell Calcium ◽  
1990 ◽  
Vol 11 (2-3) ◽  
pp. 93-109 ◽  
Author(s):  
R.Y Tsien ◽  
A.T Harootunian
Keyword(s):  
Imaging System ◽  
Design Criteria ◽  
Practical Design ◽  
Ratio Imaging ◽  
Dynamic Ratio

Theoretical aspects and practical design criteria for high-efficiency PAs

2004 ◽  
Author(s):  
Paolo Colantonio ◽  
Franco Giannini ◽  
Ernesto Limiti
Keyword(s):  
High Efficiency ◽  
Design Criteria ◽  
Practical Design

scholarly journals Fracture Energy, Fatigue and Creep Properties of Engineered Cementitious Composites Incorporating Fly Ash/Slag with Different Aggregates

2021 ◽  
Author(s):  
Mohamed A. A. Sherir
Keyword(s):  
Fly Ash ◽  
High Performance ◽  
Creep Behaviour ◽  
Fatigue Loading ◽  
Experimental Results ◽  
Silica Sand ◽  
Cementitious Composites ◽  
Multiple Cracking ◽  
Engineered Cementitious Composites ◽  
Number Of Cycles

This thesis investigates the influence of microsilica sand and local crushed sand, and different supplementary cementing materials on the mechanical properties of engineered cementitious composites (ECCs). ECC is a special type of high performance fiber reinforced cementitious composite with high ductility which exhibits strain-hardening and multiple-cracking behaviours in tension. The use of local aggregates in ECC production can lower its cost to mitigate the obstacles of wider commercial use. The experimental results showed that multiple-cracking behaviour was developed under fatigue loading for fly ash ECC (FA-ECC) mixtures, and the number of cracks was lower at both lower fatigue stress level and higher fatigue number of cycles. FA-ECC mixtures with silica sand exhibited higher deflection evolution under fatigue loading than FA-ECC mixtures with crushed sand. Based on the experimental results on link slab specimens, both FA-ECC mixtures with silica and crushed sands exhibited almost the same creep behaviour.

scholarly journals Hierarchical Distribution Matching for Probabilistic Amplitude Shaping

Entropy ◽  
2020 ◽  
Vol 22 (9) ◽  
pp. 958
Author(s):  
Stella Civelli ◽  
Marco Secondini
Keyword(s):  
Lower Layer ◽  
Minimum Energy ◽  
Single Layer ◽  
Low Complexity ◽  
Design Guidelines ◽  
Constant Composition ◽  
Distribution Matching ◽  
Practical Design ◽  
Rate Loss ◽  
Complexity Increase

Probabilistic amplitude shaping—implemented through a distribution matcher (DM)—is an effective approach to enhance the performance and the flexibility of bandwidth-efficient coded modulations. Different DM structures have been proposed in the literature. Typically, both their performance and their complexity increase with the block length. In this work, we present a hierarchical DM (Hi-DM) approach based on the combination of several DMs of different possible types, which provides the good performance of long DMs with the low complexity of several short DMs. The DMs are organized in layers. Each upper-layer DM encodes information on a sequence of lower-layer DMs, which are used as “virtual symbols”. First, we describe the Hi-DM structure, its properties, and the encoding and decoding procedures. Then, we present three particular Hi-DM configurations, providing some practical design guidelines, and investigating their performance in terms of rate loss and energy loss. Finally, we compare the system performance obtained with the proposed Hi-DM structures and with their single-layer counterparts: a 0.19dB SNR gain is obtained by a two-layer Hi-DM based on constant composition DMs (CCDM) compared to a single-layer CCDM with same complexity; a 0.12dB gain and a significant complexity reduction are obtained by a Hi-DM based on minimum-energy lookup tables compared to a single-layer DM based on enumerative sphere shaping with same memory requirements.

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