Fiber Quality Analysis: OpTest Fiber Quality Analyzer versus L&W Fiber Tester

2011 ◽  
Vol 50 (22) ◽  
pp. 12572-12578 ◽  
Author(s):  
Bin Li ◽  
Rohan Bandekar ◽  
Quanqing Zha ◽  
Ahmed Alsaggaf ◽  
Yonghao Ni
Keyword(s):  
Fiber Quality ◽  
Quality Analysis ◽  
Quality Analyzer

scholarly journals QDroid: Mobile Application Quality Analyzer for App Market Curators

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Jemin Lee ◽  
Hyungshin Kim
Keyword(s):  
User Experience ◽  
Mobile Applications ◽  
Mobile Application ◽  
Quality Analysis ◽  
Resource Usage ◽  
Source Codes ◽  
Daunting Task ◽  
Quality Analyzer ◽  
Manual Review

Low quality mobile applications have damaged the user experience. However, in light of the number of applications, quality analysis is a daunting task. For that reason, QDroid is proposed, an automated quality analyzer that detects the presence of crashes, excessive resource usage, and compatibility problems, without source codes and human involvement. QDroid was applied to 67 applications for evaluation and discovered 78% more crashes and attained 23% higher Activity coverage than Monkey testing. For detecting excessive resource usage and compatibility problems, QDroid reduced the number of applications that required manual review by up to 96% and 69%, respectively.

Design of Power Quality Analyzer Based on Labwindows/CVI

2012 ◽  
Vol 466-467 ◽  
pp. 759-762 ◽  
Author(s):  
Fan Yang ◽  
Hui Zhao
Keyword(s):  
Power Quality ◽  
Virtual Instrument ◽  
Electric Power System ◽  
Quality Analysis ◽  
Harmonic Amplitude ◽  
Quality Analyzer ◽  
Instrument Technology ◽  
Analysis System ◽  
Hardware Circuit ◽  
Design Ideas

The traditional quality analysis system has many disadvantages such as the bulky, expensive, fixed functional modules, poor extension, monotonous display etc. Combined with the virtual instrument technology, the paper propose design ideas of instrument Virtual power quality analysis based on LabWindows/CVI, including design of hardware circuit and software, obtain harmonic amplitude and phase by making use of fast Fourier transform. The analyzer has high accuracy, stable, and good anti-jamming performance, meet the electric power system testing requirements.

Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis

TAPPI Journal ◽  
2015 ◽  
Vol 14 (5) ◽  
pp. 305-309
Author(s):  
S. S. LAVRYKOV ◽  
B.V. RAMARAO
Keyword(s):  
Fiber Quality ◽  
Quality Analysis ◽  
Hydrodynamic Characteristics ◽  
Pulp Fibers ◽  
Permeability Characteristics ◽  
Surface Areas ◽  
Geometrical Features ◽  
The Impact ◽  
Specific Volumes

It is often necessary to characterize papermaking pulps in order to determine the impact of refining or to predict their drainage properties. The newer methods for pulp quality analysis determine geometrical features of pulp fibers by microimaging techniques. However, features such as fiber length, coarsenes, and their distributions do not yield easily to estimation of their drainage or papermaking properties. In quantifying the impact of refining on fiber quality, it is useful to approach the rheology of pulps as an indicator of their behavior. We determined the hydrodynamic characteristics of a variety of refined pulps along with their permeability characteristics, i.e., the hydrodynamic specific surface area and the specific volume. Our method was to analyze the filtration/drainage curves and fit predictions from models with observed data. This inversion problem is usually complex and requires global minimization techniques. This paper presents data on bleached kraft hardwood pulps and mixtures with fines and how their surface areas and specific volumes change with composition. These data are further used to predict the behavior of the pulps in drainage situations using models of forming.

On the Research of Adaptive Frequency Hopping in the Wireless Communication

2013 ◽  
Vol 347-350 ◽  
pp. 2033-2037
Author(s):  
Xiao Hu Liang ◽  
Lei Cheng
Keyword(s):  
Wireless Communication ◽  
Multipath Fading ◽  
Frequency Hopping ◽  
Link Quality ◽  
Quality Analysis ◽  
Practical Application ◽  
Channel Quality ◽  
Quality Analyzer ◽  
Hopping Model ◽  
Interference Problems

The multipath fading and interference problems in the wireless communication lead to the link quality decrease severely. However, the conventional frequency hopping scheme cannot solve the problems in an effective way. Adaptive frequency hopping scheme, which is based on the automatically link quality analysis, can avoid the bad frequencies and guarantee the desired level of channel quality. The system is analyzed based on the adaptive frequency hopping model equipped with link quality analyzer which is different from the traditional one. In the paper, some newly proposed adaptive frequency hopping schemes have been summarized, which provide an important reference for the practical application.

Effect of Lignin Genetic Modification on Wood Anatomy of Aspen Trees

IAWA Journal ◽  
2010 ◽  
Vol 31 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Balazs Horvath ◽  
Ilona Peszlen ◽  
Perry Peralta ◽  
Bohumil Kasal ◽  
Laigeng Li
Keyword(s):  
Populus Tremuloides ◽  
Cell Morphology ◽  
Radial Growth ◽  
Wood Anatomy ◽  
Lignin Content ◽  
Fiber Quality ◽  
Genetic Group ◽  
Quality Analysis ◽  
Diameter Growth ◽  
G Ratio

The directed modification of specific traits of trees through genetic engineering provides opportunities for making significant genetic improvements to wood properties in matter of years instead of extended time frames required for traditional natural selection. An attractive target of forest- tree engineering is the modification of lignin content and lignin structure. While lower lignin content improves pulping efficiency, a decrease in lignin content could affect wood characteristics that are critical for solid wood use.After one year of growth in a greenhouse, a total of forty transgenic aspen (Populus tremuloides Michx.) with reduced lignin content and increased syringyl to guaiacyl ratio were harvested and diameter growth and cell morphology were investigated using quantitative wood anatomy and fiber quality analysis techniques. Comparing genetic groups to the wild-type as the control, similar radial growth and quantitative anatomical properties were observed for the genetic group with reduced lignin content. The genetic group with increased S/G ratio had lower diameter growth, lower vessel lumen diameter, but more numerous vessels. The combined effect of changes in lignin content and structure on radial growth and cell morphology seems to be more complex and gave inconsistent results.

scholarly journals Introduction of Fiber Quality Analyzer.

1996 ◽  
Vol 50 (2) ◽  
pp. 382-388 ◽  
Author(s):  
Tomoyoshi Nomura
Keyword(s):  
Fiber Quality ◽  
Quality Analyzer

Characteristics of PPTA Chipped Fiber/Fibrid and their Properties for Sheet Making

2016 ◽  
Vol 11 (1) ◽  
pp. 155892501601100 ◽  
Author(s):  
Zhaoqing Lu ◽  
Ming Jiang ◽  
Meiyun Zhang ◽  
Xinxing Xia
Keyword(s):  
Mercury Intrusion Porosimetry ◽  
Fiber Quality ◽  
Short Fiber ◽  
Decomposition Temperature ◽  
Reinforced Concrete Structure ◽  
Initial Decomposition Temperature ◽  
Uniform Size ◽  
Quality Analyzer ◽  
High Degree ◽  
Thermal Stability Of

Poly-p-phenylene diamine terephthalamide (PPTA) chipped fibers and fibrids can be made into insulation sheet materials by papermaking wet forming and hot calendaring operations. PPTA chipped fibers offer mechanical strength for the sheet, while PPTA fibrids act as binder. Novel PPTA fibrids and chipped fibers were investigated using SEM, a fiber quality analyzer and a fiber classifier. PPTA fibrids exhibited small sized pieces with wrinkled surfaces, uniform size and a high degree of fine fibrosis while short fiber was smooth and nearly cylindrical in shape. The effect of the fibrid to chipped fiber ratio on PPTA sheet mechanical and dielectric properties is investigated and an optimal ratio of 7:3 was determined. The pore structure and thermal stability of PPTA sheet were analyzed by mercury intrusion porosimetry and TG-DSC. The structure of PPTA sheet was similar to reinforced concrete structure; the pores were small and the bind between fibers was tight. The initial decomposition temperature and TG10% of PPTA sheet are 535°C and 560°C, respectively, indicating excellent thermal properties.

Extraction of β-Glucan from Oats for Soluble Dietary Fiber Quality Analysis

2012 ◽  
Vol 89 (5) ◽  
pp. 230-236 ◽  
Author(s):  
Douglas C. Doehlert ◽  
Senay Simsek ◽  
Michael S. McMullen
Keyword(s):  
Dietary Fiber ◽  
Fiber Quality ◽  
Quality Analysis ◽  
Soluble Dietary Fiber

scholarly journals Understanding the effect of severity factor of prehydrolysis on dissolving pulp production using prehydrolysis kraft pulping and elemental chlorine-free bleaching sequence

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 4323-4336
Author(s):  
Wei Wei ◽  
Zhongjian Tian ◽  
Xingxiang Ji ◽  
Qiang Wang ◽  
Jiachuan Chen ◽  
...  
Keyword(s):  
Fiber Quality ◽  
Degree Of Polymerization ◽  
Kraft Pulping ◽  
Dissolving Pulp ◽  
Quality Analysis ◽  
X Ray Diffraction ◽  
Severity Factor ◽  
Elemental Chlorine ◽  
Prehydrolysis Kraft ◽  
Temperature Time

Prehydrolysis kraft pulping is an effective approach to produce dissolving pulp, which can be used for viscose application. The prehydrolysis process using hot liquid water could remove hemicellulose and loosen the compact cell wall, thus facilitating subsequent pulping and bleaching processes. In this study, the composite severity factor (CSF) was used to reveal the intensity of prehydrolysis treatment and its effect on the pulping and bleaching process by combining the temperature, time, and pH variables. Results showed that the optimum CSF was 6.61, which produced a pulp with α-cellulose of 92.3%, degree of polymerization (DP) of 1081, brightness of 85.1% ISO, and Kappa number of 0.61. In addition, the fiber quality, crystalline structure, and microstructure of pulps were characterized by FQA (fiber quality analysis), XRD (X-ray diffraction), and SEM (scanning electron microscopy).

Sign in / Sign up

Export Citation Format

Share Document