A Novel Dimension Measurement System of Hot Large Open Die Forgings

2011 ◽  
Vol 291-294 ◽  
pp. 2728-2732 ◽  
Author(s):  
Jin Tao Liang ◽  
Sheng Dun Zhao ◽  
Jian Wang Zhao
Keyword(s):  
Measurement System ◽  
High Efficiency ◽  
Fast Response ◽  
Laser Ranging ◽  
Material Loss ◽  
Large Size ◽  
Dimension Measurement ◽  
Radial Dimension ◽  
Axial Dimension ◽  
Open Die Forging

In this paper, based on the analysis of the problem about manual measure for hot large open die forings and the significance for realizing noncontact online measure, a novel dimension measurement system of hot large open die forgings is presented. Laser ranging method is used for measuring axial dimension and binocular vision method is used for measuring radial dimension, so that the system characterized by large size, automated, fast response and high precision which benefits high efficiency and low material loss in open die forging process.

scholarly journals Modified Levy Flight Optimization for a Maximum Power Point Tracking Algorithm under Partial Shading

2021 ◽  
Vol 11 (3) ◽  
pp. 992
Author(s):  
Chanuri Charin ◽  
Dahaman Ishak ◽  
Muhammad Ammirrul Atiqi Mohd Zainuri ◽  
Baharuddin Ismail
Keyword(s):  
High Efficiency ◽  
Energy System ◽  
Fast Response ◽  
Lévy Flight ◽  
Partial Shading ◽  
Levy Flight ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Steady State Oscillation ◽  
Power Point

This paper presents a novel modified Levy flight optimization for a photovoltaic PV solar energy system. Conventionally, the Perturb and Observe (P&O) algorithm has been widely deployed in most applications due to its simplicity and ease of implementation. However, P&O suffers from steady-state oscillation and stability, besides its failure in tracking the optimum power under partial shading conditions and fast irradiance changes. Therefore, a modified Levy flight optimization is proposed by incorporating a global search of beta parameters, which can significantly improve the tracking capability in local and global searches compared to the conventional methods. The proposed modified Levy flight optimization is verified with simulations and experiments under uniform, non-uniform, and dynamic conditions. All results prove the advantages of the proposed modified Levy flight optimization in extracting the optimal power with a fast response and high efficiency from the PV arrays.

Sprayed P25 scaffolds for high-efficiency mesoscopic perovskite solar cells

2015 ◽  
Vol 51 (51) ◽  
pp. 10306-10309 ◽  
Author(s):  
Haibo Huang ◽  
Jiangjian Shi ◽  
Songtao Lv ◽  
Dongmei Li ◽  
Yanhong Luo ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Uniform Thickness ◽  
Large Size ◽  
Spray Method

Uniform, thickness-controllable and large-size mesoscopic TiO2 films have been prepared by a spray method by using commercial P25 nanoparticles, yielding high efficiency for perovskite solar cells.

Development of High-Efficiency Zn2SiO4:Mn Thin Films for Flat Panel Cathodoluminescent Displays

1997 ◽  
Vol 471 ◽  
Author(s):  
J. Liu ◽  
D. C. Morton ◽  
M. R. Miller ◽  
Y. Li ◽  
E. W. Forsythe ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Conductivity ◽  
Response Time ◽  
Decay Time ◽  
High Efficiency ◽  
Fast Response ◽  
Flat Panel ◽  
Powder Phosphor ◽  
Fast Response Time

ABSTRACTZn2SiO4:Mn thin films were deposited and studied as thin film phosphors for flat panel cathodoluminescent displays. Crystallized films with improved electrical conductivity were obtained after conventional and rapid thermal annealings in a N2 environment at 850Xy11100 °C for 0.25 to 60 minutes. A maximum cathodoluminescent efficiency of 1.3 Lm/W was achieved under dc excitation at 1500 volts. The luminescent emission from these thin films was peaked around 525 nm. The decay time of these films was controlled in the range of 2 to 10 ms by varying the deposition and annealing parameters. The fast response time of these thin films overcomes the long decay limitation of the Zn2SiO4:Mn powder phosphor in practical display applications.

Five Strip-Type Dye Sensitized Solar Cells with Metal Grid Lines

2007 ◽  
Vol 119 ◽  
pp. 315-318
Author(s):  
Won Jae Lee ◽  
Easwaramoorthi Ramasamy ◽  
Dong Yoon Lee ◽  
Jae Sung Song
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Standard Condition ◽  
Light Condition ◽  
Fluorescent Light ◽  
Simple Method ◽  
Dye Sensitized ◽  
Large Size ◽  
Sensitized Solar Cells

Dye sensitized solar cells (DSSC) have great potential alternative to expensive conventional solar cells, since high efficiency and relatively simple fabrication process. However, in large size cell, there is a key factor that delayed the entry of such cells in commercial market. Performance of large size cell is lower than small size cells, since a carrier loss occurs in high resistive TCO glass substrate. Here we demonstrate a simple method to reduce resistive loss and efficient collection of photo generated carriers via strip type cells with metal grids. Using strip type cells, we constitute series and parallel type DSSC panels in order to achieve required voltage and current respectively. Stripe cells were prepared from commercial TiO2 powder by screen printing method. In addition, metal grids were established adjacent to sealant line. Using these as unit cell, portable DSSC panels were assembled and I-V performance was carried out in indoor light condition (fluorescent light, 30mW/cm2) and standard condition (Pin 100 mW/cm2, AM 1.5).

TSSM: Three-State Switchable Memristor Model Based on Ag/TiOx Nanobelt/Ti Configuration

2021 ◽  
Vol 31 (07) ◽  
pp. 2130020
Author(s):  
Xiaoyue Ji ◽  
Donglian Qi ◽  
Zhekang Dong ◽  
Chun Sing Lai ◽  
Guangdong Zhou ◽  
...  
Keyword(s):  
High Efficiency ◽  
Response Speed ◽  
Differential Resistance ◽  
Fast Response ◽  
Boolean Logic ◽  
Behavioral Characteristics ◽  
Model Based ◽  
Geometry Nonlinearity ◽  
Neuromorphic System ◽  
Logic Operations

Memristive technologies are attractive due to their nonvolatility, high density, low power, nanoscale geometry, nonlinearity, binary/multiple memory capacity, and negative differential resistance. For memristive devices, a model corresponding with practical behavioral characteristics is highly favorable for the realization of its neuromorphic system and applications. In this paper, we propose a novel memristor model based on the Ag/TiOx nanobelt/Ti configuration, which can reflect three different states (i.e. original stage, transition stage, and resistive switching state) of the physical memristor with a satisfactory fitting precision (greater than 99.88%). Meanwhile, this work gives (1) an insight onto the electrical characteristics of the memristor model under different humidity conditions; (2) the influence of the water molecular concentration on the memristor behavior, which is of importance for the memristor fabrication and subsequent applications. For verification purposes, the proposed three-state switchable memristor is applied into the memristor-based logic implementation. The experimental results demonstrate that the constructed circuit is able to realize basic Boolean logic operations with fast response speed and high efficiency.

Measurement System of Optical Homogeneity of Large-Size Optical Material Based on Subaperture Stitching Technique

2012 ◽  
Vol 32 (4) ◽  
pp. 0412002
Author(s):  
徐新华 Xu Xinhua ◽  
王青 Wang Qing ◽  
宋波 Song Bo ◽  
傅英 Fu Ying
Keyword(s):  
Measurement System ◽  
Optical Material ◽  
Optical Homogeneity ◽  
Large Size ◽  
Subaperture Stitching

Fast Calibration Method of Large Dimension Measurement System Based on Multi-Camera Array

2018 ◽  
Vol 38 (12) ◽  
pp. 1215002 ◽  
Author(s):  
吴庆华 Wu Qinghua ◽  
陈慧 Chen Hui ◽  
朱思斯 Zhu Sisi ◽  
周阳 Zhou Yang ◽  
万偲 Wan Cai
Keyword(s):  
Measurement System ◽  
Calibration Method ◽  
Large Dimension ◽  
Camera Array ◽  
Dimension Measurement
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