scholarly journals Constraint Violations in Stochastically Generated Data: Detection and Correction Strategies

2014 ◽  
Vol 2014 ◽  
pp. 1-11
Author(s):  
Adam Fadlalla ◽  
Toshinori Munakata
Keyword(s):  
Versus Characteristic ◽  
Experimental Results ◽  
Data Detection ◽  
Characteristic Parameters ◽  
Stochastic Data ◽  
Correction Strategies

We consider the generation of stochastic data under constraints where the constraints can be expressed in terms of different parameter sets. Obviously, the constraints and the generated data must remain the same over each parameter set. Otherwise, the parameters and/or the generated data would be inconsistent. We consider how to avoid or detect and then correct such inconsistencies under three proposed classifications: (1) data versus characteristic parameters, (2) macro- versus microconstraint scopes, and (3) intra- versus intervariable relationships. We propose several strategies and a heuristic for generating consistent stochastic data. Experimental results show that these strategies and heuristic generate more consistent data than the traditional discard-and-replace methods. Since generating stochastic data under constraints is a very common practice in many areas, the proposed strategies may have wide-ranging applicability.

scholarly journals Relationship Among Preparation, Structure and Superconductivity in Ti-Ca-Ba-Cu-O Compounds

1993 ◽  
Vol 15 (3-4) ◽  
pp. 117-138
Author(s):  
I. Kirschner ◽  
S. Leppävuori ◽  
A. Uusimäki
Keyword(s):  
Single Phase ◽  
Substantial Effect ◽  
Experimental Results ◽  
Characteristic Parameters ◽  
Term Stability ◽  
Long Term Stability ◽  
Preparation Conditions ◽  
Superconducting Parameters

Analysis of a comprehensive set of experimental results has proven the substantial effect of the precise preparation conditions upon the structure and superconducting parameters of Ti-Ca-Ba-Cu-O samples. The techniques required for the preparation of specimens of single phase and long-term stability, together with methods for improvement of the characteristic parameters have been determined. Comparing results derived from samples prepared by different methods has allowed the quantitative differences of the characteristic parameters to be evaluated.

Determination of the Equation of State of Polyisobutylene

1969 ◽  
Vol 42 (5) ◽  
pp. 1409-1411
Author(s):  
B. E. Eichinger ◽  
P. J. Flory
Keyword(s):  
Thermal Expansion ◽  
Equation Of State ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Pressure Coefficient ◽  
Experimental Results ◽  
Characteristic Parameters ◽  
Thermal Pressure

Abstract The density, thermal expansion coefficient, and thermal pressure coefficient for polyisobutylene of mol wt 40,000 have been accurately determined from 0 to 150°. Results are compared with the reduced equation of state employed in the theory of solutions. The characteristic parameters v*, T*, and p* required for the treatment of polyisobutylene solutions are obtained from the experimental results.

DWT-BASED VIDEO DATA HIDING ROBUST TO MPEG COMPRESSION AND FRAME LOSS

2005 ◽  
Vol 05 (01) ◽  
pp. 111-133 ◽  
Author(s):  
HONGMEI LIU ◽  
JIWU HUANG ◽  
YUN Q. SHI
Keyword(s):  
Data Hiding ◽  
Random Noise ◽  
Data Retrieval ◽  
Video Data ◽  
Experimental Results ◽  
Data Detection ◽  
Discrete Wavelet ◽  
Magnitude Distribution ◽  
Embedding Strategy ◽  
Error Probabilities

In this paper, we propose a blind video data-hiding algorithm in DWT (discrete wavelet transform) domain. It embeds multiple information bits into uncompressed video sequences. The major features of this algorithm are as follows. (1) Development of a novel embedding strategy in DWT domain. Different from the existing schemes based on DWT that have explicitly excluded the LL subband coefficients from data embedding, we embed data in the LL subband for better invisibility and robustness. The underlying idea comes from our qualitative and quantitative analysis of the DWT coefficients magnitude distribution over commonly used images. The experimental results confirm the superiority of the proposed embedding strategy. (2) To combat temporal attacks, which will destroy the synchronization of hidden data that is necessary in data retrieval, we develop an effective temporal synchronization technique. Compared with the sliding correlation proposed in the existing algorithms, our synchronization technique is more advanced. (3) We adopt a new 3D interleaving technique to combat bursts of errors, while reducing random error probabilities in data detection by exploiting ECC (error correcting coding). The detection error rate with 3D interleaving is much lower than that without 3D interleaving when frame loss rate is below 50%. (4) Take a carefully designed measure in bit embedding to guarantee the invisibility of information. In experiments, we can embed a string of 402 bytes (excluding the redundant bits associated with ECC) in 96 frames of the CIF format sequence. The experimental results have demonstrated that the embedded information bits are perceptually transparent when the frames in the sequence are viewed either as still images or played continuously. The hidden information is robust to manipulations, such as MPEG-2 compression, scaling, additive random noise, and frame loss.

scholarly journals Research on Three Dimensional Scheduling Model for Embedded Multi-Core System

2018 ◽  
Vol 36 (5) ◽  
pp. 1020-1025
Author(s):  
Shujuan Huang ◽  
Yi'an Zhu ◽  
Bailin Liu ◽  
Feng Xiao
Keyword(s):  
Three Dimensional ◽  
Experimental Results ◽  
Characteristic Parameters ◽  
Core System ◽  
System Utilization ◽  
Scheduling Model ◽  
Interference Region ◽  
Free Region ◽  
Rectangular Area

This paper proposes a new three-dimensional scheduling model which can divide the tasks into harmonic tasks and non-harmonic tasks for the high demands of embedded mucticne plactorim. According to the characteristic parameters of the tasks and make the value of the rectangular area as the attribute of the execution region which is divided into executive region, interference region and free region with the characteristic of the area. By using these attributes of the different region, the tasks are allocated to different cores. Experimental results show that the proposed method is more fully optimizing the system utilization and throughput than PEDF.

scholarly journals Frazil Formation in Water of Different Salinities and Supercoolings

1985 ◽  
Vol 31 (108) ◽  
pp. 74-85 ◽  
Author(s):  
Gee Tsang ◽  
Thomas O’D. Hanley
Keyword(s):  
Production Rate ◽  
Laboratory Experiments ◽  
Experimental Results ◽  
Characteristic Parameters ◽  
Highly Sensitive ◽  
Normalized Concentration

AbstractThe formation of frazil in water of different salinities and initial supercoolings was studied in the laboratory. Experiments were conducted both on genuine and artificial sea-waters. From analysing the experimental results, it was found that the production rate of frazil is highly sensitive to the initial supercooling of the water and will increase over three orders of magnitude as the initial supercooling increases from zero to 2° C. By properly non-dimensionalizing the parameters, it was found that the normalized concentration of frazil in water is principally a function of the normalized time. For the rate of production of frazil, however, it was found that the normalized rate of frazil production, besides being a function of the normalized time, is also affected by the salinity and the initial supercooling of the water. Different frazil crystals formed in water of different salinities and initial supercoolings are thought to be the reason for the different curves of frazil production rate. The normalization of parameters requires the determination of some characteristic parameters which were found to be well-defined functions of initial supercooling and salinity.

scholarly journals Frazil Formation in Water of Different Salinities and Supercoolings

1985 ◽  
Vol 31 (108) ◽  
pp. 74-85 ◽  
Author(s):  
Gee Tsang ◽  
Thomas O’D. Hanley
Keyword(s):  
Production Rate ◽  
Laboratory Experiments ◽  
Experimental Results ◽  
Characteristic Parameters ◽  
Highly Sensitive ◽  
Normalized Concentration

AbstractThe formation of frazil in water of different salinities and initial supercoolings was studied in the laboratory. Experiments were conducted both on genuine and artificial sea-waters. From analysing the experimental results, it was found that the production rate of frazil is highly sensitive to the initial supercooling of the water and will increase over three orders of magnitude as the initial supercooling increases from zero to 2° C. By properly non-dimensionalizing the parameters, it was found that the normalized concentration of frazil in water is principally a function of the normalized time. For the rate of production of frazil, however, it was found that the normalized rate of frazil production, besides being a function of the normalized time, is also affected by the salinity and the initial supercooling of the water. Different frazil crystals formed in water of different salinities and initial supercoolings are thought to be the reason for the different curves of frazil production rate. The normalization of parameters requires the determination of some characteristic parameters which were found to be well-defined functions of initial supercooling and salinity.

Research of Target Recognition Based on Active Shape Model

2012 ◽  
Vol 522 ◽  
pp. 720-725
Author(s):  
Hong Xing Peng ◽  
Xiang Jun Zou ◽  
Jun Tao Xiong ◽  
Ai Xia Guo ◽  
Li Juan Chen ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Target Recognition ◽  
Recognition Rate ◽  
Principal Component ◽  
Experimental Results ◽  
Active Shape Model ◽  
Characteristic Parameters ◽  
Shape Model ◽  
Active Shape ◽  
Different Shapes

The problem of robot operation based on vision is to locate and identify the target. The approach of active shape model has been used to identify the target and taken citrus as example in this article. First, the different shapes of citrus are calibrated and calibrated; Second, the method of principal component analysis is used to get the models of different shapes of citrus; Finally, the models are used to do gray matching with the actual citrus and the characteristic parameters such as the ratio of pixel to number are extracted to achieve the identify of the citrus image. The experimental results show that the method has higher recognition rate for citrus image and better robust and good flexibility.

Prediction of the Elastic Modulus of Self-Compacting Concrete Based on SVM

2013 ◽  
Vol 357-360 ◽  
pp. 1023-1026 ◽  
Author(s):  
Yan Fei Cao ◽  
Wei Wu ◽  
Han Lei Zhang ◽  
Jun Ming Pan
Keyword(s):  
Elastic Modulus ◽  
Support Vector Machines ◽  
Predictive Model ◽  
Coarse Aggregate ◽  
Experimental Results ◽  
Support Vector ◽  
Characteristic Parameters ◽  
Self Compacting Concrete ◽  
Vector Machines

With the powerful regression and fitting of support vector machines in uncertainty and the non-linear,based on the determination of the content of the coarse aggregate and characteristic parameters, this paper established a predictive model of self-compacting concrete elastic modulus based on support vector machine.Through analysis and comparison with experimental results, it proves the accuracy and effectiveness of the model.

Detection and Recognition of Steel Ball Surface Defect Based on MATLAB

2009 ◽  
Vol 416 ◽  
pp. 603-608 ◽  
Author(s):  
Yong Zhi Lin ◽  
Xian Li Liu ◽  
Hai Ying Han ◽  
Yi Wen Wang ◽  
Peng Wang
Keyword(s):  
Surface Defect ◽  
Shape Parameter ◽  
Surface Defects ◽  
Steel Ball ◽  
Experimental Results ◽  
Characteristic Parameters ◽  
Experimental Platform ◽  
Ball Surface ◽  
The Given ◽  
Detection And Recognition

Taking MATLAB as the experimental platform, the detection and recongnition method of steel ball surface defect is put forward. With the method, we could determine whether there are surface defects or not, and identify the types of defects. The process of detection and recognition is as follows: Firstly, two-time wavelet de-noising treatment of the steel ball image is achieved by means of ecomposition, quantization of threshold and recongnition of Sym4 wavelet function, afterward, many collected noise of the steel ball image is reduced effectively. Secondly, the de-noised image is preprocessed and then we can calibrate the boundary of the defects accurately, which is used to extract the characteristic parameters of defects. Thirdly, the types of defects of steel ball are judged, and the process of pattern recognition is reasonablely designed by putting forward the shape parameter F, combined with the characteristic parameters of the defects. Lastly, the feasibility and validity of the detection and recongnition algorithm are verified by lots of analysis about experimental results especially the analysis on the experimental results comparing with the given data.

Éléments de couplage thermomécanique dans la consolidation de sols non saturés

2000 ◽  
Vol 37 (2) ◽  
pp. 308-317 ◽  
Author(s):  
C Saix ◽  
P Devillers ◽  
M S El Youssoufi
Keyword(s):  
Unsaturated Soils ◽  
Mechanical Characteristics ◽  
Experimental Results ◽  
Silty Sand ◽  
Characteristic Parameters ◽  
Mechanical Coupling ◽  
Thermal Consolidation ◽  
Quantitative Results ◽  
Mechanical Consolidation ◽  
Sols Non Saturés

Thermomechanical couplings in the consolidation of an unsaturated clayey silty sand are investigated. The couplings are analysed through the influence of the temperature (relative to the total vertical stress) on the mechanical characteristics (relative to thermal) of the consolidation. They are evidenced by means of two types of tests (thermal consolidation and mechanical consolidation). The two types of tests lead to quantitative results comparable with regards to characteristic parameters of both types of consolidation. Some elements of interpretation are proposed to integrate all of the experimental results within a framework of thinking resorting to the thermoelastoplastic behaviour of the soil under study and to the thermal and mechanical hardening phenomena.Key words: unsaturated soils, consolidation, thermal, mechanical, coupling, hardening.

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