Impact of the starting point chromaticity on memory color matching accuracy

In this study, we improve the matching accuracy of underwater gravity matching navigation. Firstly, the Iterative Optimal Annulus Point (IOAP) method with a novel grid topology is proposed for breaking through the inherent grid structure limit of the canonical gravity matching algorithm and enhancing its underwater gravity matching accuracy. The theory of IOAP is as follows: (1) small-annulus matching and positioning mechanism on the tracking starting point is developed by employing the starting point and drift error of the INS (Inertial Navigation System), the fixed rotation angle, etc. The optimal matching location of the starting point is obtained by matching and comparing the matched points in this small-annulus grid, which contributes to heightening the initial-position error insensitivity of the algorithms. (2) Variable-angle three-layer annulus matching and positioning mechanisms on the tracking ending point were constructed by using the optimal matching location of the starting point and combining the tracking direction-and-distance information of the INS and the cumulative drift error, etc. It is used to generate the annulus matching points with the ring-type grid topology. (3) The optimal matching position of the ending point in this annulus is obtained by iteratively calculating the evaluation index value of the matching points and following the evaluation index optimal rule. Secondly, we comprehensively consider the main performance evaluation indexes of the underwater gravity matching algorithms, such as the statistical indicators of the matching accuracy, the average matching time and the matching success rate, and take them as a basis of the pros and cons of the matching analysis. Furthermore, under conditions that include different scale searching regions or different reference-angle ring radii, the statistical results verify that the IOAP had a different matching ability and better robustness. Finally, several trajectories with the starting points from different areas and the ending points in different gravity ranges are tested and compared to carry out the numerical simulations. These results indicate that the IOAP has many advantages, such as a high matching accuracy and strong positioning applicability in different gravity regions. Compared with the TERCOM (terrain contour matching algorithm), its average matching accuracy was the highest, increased by 40.39%.

Download Full-text

Influence of LED Primary Colors on Color Matching Accuracy

Acta Optica Sinica ◽

10.3788/aos202040.1633001 ◽

2020 ◽

Vol 40 (16) ◽

pp. 1633001

Author(s):

郭春丽 Guo Chunli ◽

黄敏 Huang Min ◽

习永惠 Xi Yonghui ◽

潘洁 Pan Jie

Keyword(s):

Color Matching ◽

Matching Accuracy

Download Full-text

THE IMPACT OF MATCHING PRIMARY PEAK WAVELENGTH ON COLOR MATCHING ACCURACY AND OBSERVER VARIABILITY

Color and Imaging Conference ◽

10.2352/issn.2169-2629.2019.27.39 ◽

2019 ◽

Vol 2019 (1) ◽

pp. 220-224

Author(s):

Li J. ◽

Hanselaer P. ◽

Smet K.A.G.

Keyword(s):

Solid State ◽

Observer Variability ◽

Color Matching ◽

Peak Wavelength ◽

Matching Accuracy ◽

Definitive Answer ◽

Standard Observer ◽

Matching Performance ◽

The Impact ◽

Over Time

Over time, much work has been carried out to ascertain the accuracy of the CIE standard color-matching functions, but no definitive answer has been given. Recent work indicates an undeniable discrepancy between visual and computed metamers calculated using the existing CIE (the International Commission on Illumination) standard observer CMFs, especially when matching with narrowband sources. With a spectrally tunable solid-state light source, a series of pilot matching experiments have been done using primaries with different peak wavelengths. The results indicate which regions in wavelength space are most sensitive to generating matching inaccuracies for a given CMF set and which primary combinations have the most stable matching performance.

Download Full-text

The Design and Development of Apparel Fabric in Thin Jacquard Trim Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.633-634.484 ◽

2014 ◽

Vol 633-634 ◽

pp. 484-487

Author(s):

Peng Xiao Jiang ◽

Yu Jue Wang ◽

Rong He ◽

San Xing Zhang ◽

Zhe Feng Wang ◽

...

Keyword(s):

Graphic Design ◽

New Products ◽

Modern Society ◽

Development Trend ◽

Color Matching ◽

Design And Development ◽

Production Processes ◽

Starting Point ◽

The Development Trend

In modern society,apparel has become an essential article of utility and art supplies of human life.The paper will be developed thin fabric as a starting point, from graphic design, color matching, expand exploration and research materials materials, production processes, etc., to follow the laws of aesthetics, focusing on the use of jacquard trim process, designed to meet the development trend of clothing jacquard fabric with a thin new products.

Download Full-text

Crystal structure images of large gold clusters and growing crystals by HRTEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010011218x ◽

1984 ◽

Vol 42 ◽

pp. 428-429

Author(s):

L.R. Wallenberg ◽

J.-O. Bovin ◽

G. Schmid

Keyword(s):

Crystal Structure ◽

Nucleation And Growth ◽

Close Packing ◽

Gold Clusters ◽

Molecular Weight Determination ◽

Growth Mechanisms ◽

Starting Point ◽

Different Types ◽

Nucleation And Growth Mechanisms ◽

Points Of View

Metallic clusters are interesting from various points of view, e.g. as a mean of spreading expensive catalysts on a support, or following heterogeneous and homogeneous catalytic events. It is also possible to study nucleation and growth mechanisms for crystals with the cluster as known starting point.Gold-clusters containing 55 atoms were manufactured by reducing (C6H5)3PAuCl with B2H6 in benzene. The chemical composition was found to be Au9.2[P(C6H5)3]2Cl. Molecular-weight determination by means of an ultracentrifuge gave the formula Au55[P(C6H5)3]Cl6 A model was proposed from Mössbauer spectra by Schmid et al. with cubic close-packing of the 55 gold atoms in a cubeoctahedron as shown in Fig 1. The cluster is almost completely isolated from the surroundings by the twelve triphenylphosphane groups situated in each corner, and the chlorine atoms on the centre of the 3x3 square surfaces. This gives four groups of gold atoms, depending on the different types of surrounding.

Download Full-text

Two isoprenylated flavonoids from Dorstenia psilurus activate AMPK, stimulate glucose uptake, inhibit glucose production and lower glycemia

Biochemical Journal ◽

10.1042/bcj20190326 ◽

2019 ◽

Vol 476 (24) ◽

pp. 3687-3704 ◽

Cited By ~ 2

Author(s):

Aphrodite T. Choumessi ◽

Manuel Johanns ◽

Claire Beaufay ◽

Marie-France Herent ◽

Vincent Stroobant ◽

...

Keyword(s):

Glucose Uptake ◽

Human Cancer ◽

Glucose Production ◽

Liver Mitochondria ◽

New Drugs ◽

Structural Isomer ◽

Rat Liver Mitochondria ◽

Ionization Mass ◽

Ampk Activation ◽

Starting Point

Root extracts of a Cameroon medicinal plant, Dorstenia psilurus, were purified by screening for AMP-activated protein kinase (AMPK) activation in incubated mouse embryo fibroblasts (MEFs). Two isoprenylated flavones that activated AMPK were isolated. Compound 1 was identified as artelasticin by high-resolution electrospray ionization mass spectrometry and 2D-NMR while its structural isomer, compound 2, was isolated for the first time and differed only by the position of one double bond on one isoprenyl substituent. Treatment of MEFs with purified compound 1 or compound 2 led to rapid and robust AMPK activation at low micromolar concentrations and increased the intracellular AMP:ATP ratio. In oxygen consumption experiments on isolated rat liver mitochondria, compound 1 and compound 2 inhibited complex II of the electron transport chain and in freeze–thawed mitochondria succinate dehydrogenase was inhibited. In incubated rat skeletal muscles, both compounds activated AMPK and stimulated glucose uptake. Moreover, these effects were lost in muscles pre-incubated with AMPK inhibitor SBI-0206965, suggesting AMPK dependency. Incubation of mouse hepatocytes with compound 1 or compound 2 led to AMPK activation, but glucose production was decreased in hepatocytes from both wild-type and AMPKβ1−/− mice, suggesting that this effect was not AMPK-dependent. However, when administered intraperitoneally to high-fat diet-induced insulin-resistant mice, compound 1 and compound 2 had blood glucose-lowering effects. In addition, compound 1 and compound 2 reduced the viability of several human cancer cells in culture. The flavonoids we have identified could be a starting point for the development of new drugs to treat type 2 diabetes.

Download Full-text

Overview of Current Approaches to Aural Rehabilitation for Adults With Cochlear Implants

Perspectives of the ASHA Special Interest Groups ◽

10.1044/2020_persp-20-00078 ◽

2020 ◽

Vol 5 (5) ◽

pp. 1175-1187

Author(s):

Rachel Glade ◽

Erin Taylor ◽

Deborah S. Culbertson ◽

Christin Ray

Keyword(s):

Health Care ◽

Clinical Practice ◽

Cochlear Implants ◽

Practice Patterns ◽

The United States ◽

Care Providers ◽

Aural Rehabilitation ◽

Starting Point ◽

Clinical Models ◽

Hearing Health

Purpose This clinical focus article provides an overview of clinical models currently being used for the provision of comprehensive aural rehabilitation (AR) for adults with cochlear implants (CIs) in the Unites States. Method Clinical AR models utilized by hearing health care providers from nine clinics across the United States were discussed with regard to interprofessional AR practice patterns in the adult CI population. The clinical models were presented in the context of existing knowledge and gaps in the literature. Future directions were proposed for optimizing the provision of AR for the adult CI patient population. Findings/Conclusions There is a general agreement that AR is an integral part of hearing health care for adults with CIs. While the provision of AR is feasible in different clinical practice settings, service delivery models are variable across hearing health care professionals and settings. AR may include interprofessional collaboration among surgeons, audiologists, and speech-language pathologists with varying roles based on the characteristics of a particular setting. Despite various existing barriers, the clinical practice patterns identified here provide a starting point toward a more standard approach to comprehensive AR for adults with CIs.

Download Full-text

Indirect Assessment of Attitudes with Response-Time-Based Measures

Zeitschrift für Sozialpsychologie ◽

10.1024/0044-3514.37.3.131 ◽

2006 ◽

Vol 37 (3) ◽

pp. 131-139 ◽

Cited By ~ 15

Author(s):

Juliane Degner ◽

Dirk Wentura ◽

Klaus Rothermund

Keyword(s):

Social Cognitive ◽

Incremental Validity ◽

Self Report ◽

Small Scale ◽

Implicit Measures ◽

Scale Theory ◽

Starting Point ◽

Self Reports ◽

Predicting Behavior ◽

Social Cognitive Theories

Abstract: We review research on response-latency based (“implicit”) measures of attitudes by examining what hopes and intentions researchers have associated with their usage. We identified the hopes of (1) gaining better measures of interindividual differences in attitudes as compared to self-report measures (quality hope); (2) better predicting behavior, or predicting other behaviors, as compared to self-reports (incremental validity hope); (3) linking social-cognitive theories more adequately to empirical research (theory-link hope). We argue that the third hope should be the starting point for using these measures. Any attempt to improve these measures should include the search for a small-scale theory that adequately explains the basic effects found with such a measure. To date, small-scale theories for different measures are not equally well developed.

Download Full-text

The Solidarity of Distance1

Zeitschrift für Sozialpsychologie ◽

10.1024/0044-3514.36.3.103 ◽

2005 ◽

Vol 36 (3) ◽

pp. 103-115 ◽

Cited By ~ 3

Author(s):

Robert A. Wicklund

Keyword(s):

Physical Contact ◽

Emotional Distance ◽

Starting Point ◽

Shared Emotions ◽

Common Goals ◽

Full Interaction ◽

The Individual ◽

Social Incompetence

Abstract: Solidarity in the classic sense pertains to a cohesion among humans that entails physical contact, shared emotions, and common goals or projects. Characteristic cases are to be found among families, close friends, or co-workers. The present paper, in contrast, treats a phenomenon of the solidarity of distance, a solidarity based in fear of certain others and in incompetence to interact with them. The starting point for this analysis is the person who is motivated to interact with others who are unfamiliar or fear-provoking. Given that the fear and momentary social incompetence do not allow a full interaction to ensue, the individual will move toward solidarity with those others on a symbolic level. In this manner the motivation to approach the others is acted upon while physical and emotional distance is retained.

Download Full-text