Study of Mappings in a Neighborhood of an Abnormal Point

2000 ◽  
pp. 245-285
Author(s):  
Aram V. Arutyunov
Keyword(s):  
Abnormal Point

scholarly journals Transformer User Identification Method Based on Abnormal Point Detection and Large Data Clustering

2019 ◽  
Vol 295 ◽  
pp. 052036
Author(s):  
Chen Liu ◽  
Junping Wang ◽  
Zhongxiao He ◽  
Meng Wu ◽  
Jialing Bai ◽  
...  
Keyword(s):  
Data Clustering ◽  
Large Data ◽  
User Identification ◽  
Identification Method ◽  
Point Detection ◽  
Abnormal Point

Properties of solutions of parametric time-optimal problems in a neighborhood of an abnormal point

2009 ◽  
Vol 45 (6) ◽  
pp. 889-901
Author(s):  
O. I. Kostyukova ◽  
E. A. Kostina
Keyword(s):  
Time Optimal ◽  
Abnormal Point

Investigation of Approximation Methods for Mechanism Reliability Analysis Considered Nonlinear Response

2014 ◽  
Vol 635-637 ◽  
pp. 457-461
Author(s):  
Hui Wang
Keyword(s):  
Reliability Analysis ◽  
Nonlinear Dynamic ◽  
Kriging Model ◽  
Dynamic Responses ◽  
Joint Clearance ◽  
Support Vector ◽  
Surface Model ◽  
Key Factors ◽  
Input Variables ◽  
Abnormal Point

The joint clearance and contact phenomena are the key factors which can induce the nonlinear dynamic responses and affect the performance of the practical mechanism. It is difficult to solve the nonlinear relations between the input variables and responses when the random factors are considered. In this paper, three approximation models, i.e., Response Surface Model (RSM), Kriging model and Support Vector Machine (SVM), are selected to investigate the reliability analysis procedure by the combination of simulation technique and approximation model for the mechanism with joint clearance. The solution strategy with supplemental samples is proposed to solve the problem caused by the occurrence of the abnormal point in the iteration procedure, and to avoid the divergence in the reliability analysis caused by the nonlinear dynamic responses of the mechanism. Meanwhile, the computational consumption can be reduced as the results of the known samples are reused. Finally, the reliability analysis for a slider-crank mechanism with joint clearance is utilized to illustrate the proposed procedure.

Inverse function in the neighborhood of an abnormal point of a smooth map

2012 ◽  
Vol 85 (3) ◽  
pp. 305-308
Author(s):  
E. R. Avakov ◽  
A. V. Arutyunov ◽  
D. Yu. Karamzin
Keyword(s):  
Inverse Function ◽  
Smooth Map ◽  
Abnormal Point

Patients with ocular hypertension have abnormal point scotopic thresholds in the superior hemifield

1996 ◽  
Vol 122 (4) ◽  
pp. 605
Author(s):  
George B. Bartley ◽  
RJ Stirling ◽  
P Pawson ◽  
GM Brimlow ◽  
SA Vernon
Keyword(s):  
Ocular Hypertension ◽  
Abnormal Point

scholarly journals Optimization of Abnormal Point Cloud Recognition in Robot Vision Grinding System Based on Multidimensional Improved Eigenvalue Method (MIEM)

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Guanglei Li ◽  
Yahui Cui ◽  
Lihua Wang ◽  
Lei Meng
Keyword(s):  
Point Cloud ◽  
Robot Vision ◽  
Cloud Data ◽  
Eigenvalue Method ◽  
Multidimensional Approximation ◽  
Identification Approach ◽  
Comprehensive Judgment ◽  
Abnormal Points ◽  
Grinding System ◽  
Abnormal Point

To improve the accurate and sufficient recognition of abnormal points on the workpiece, a multidimensional anomaly point identification approach based on an improved eigenvalue method is proposed in this paper. Whether a point is normal or not depends on the angle between the two adjacent vectors which consisted of four adjacent points around the current focus. The comprehensive judgment is carried out by multidimensional approximation. The numerical simulation and actual experiment validate the efficiency of the proposed method to quickly and accurately identify the abnormal point cloud in the surface point cloud data.

scholarly journals Superficial Thrombosis of Pelvic Congestion Syndrome Mimicking Pelvic Abscess

2019 ◽  
Vol 3 (3) ◽  
pp. 237-239
Author(s):  
Adrian Romero ◽  
Janae Hohbein ◽  
Shana Ross
Keyword(s):  
Computed Tomography ◽  
Emergency Department ◽  
Chronic Pelvic Pain ◽  
Point Of Care ◽  
Pelvic Abscess ◽  
Point Of Care Ultrasound ◽  
Pelvic Congestion Syndrome ◽  
Previous Diagnosis ◽  
Abnormal Point ◽  
Pelvic Congestion

Pelvic congestion syndrome (PCS) is an uncommon illness that is typically diagnosed after chronic pelvic pain. We present a case of superficial thrombosis of pelvic veins from PCS that presented to the emergency department (ED) as a previous diagnosis of pelvic abscess with cellulitis. PCS was diagnosed in the ED by computed tomography after an abnormal point-of-care ultrasound. Here we describe this unusual presentation and our approach to the diagnosis.

Solubility and Rheological Properties of Live Crude Oils

2012 ◽  
Vol 524-527 ◽  
pp. 1881-1888
Author(s):  
Fei Yang ◽  
Chuan Xian Li ◽  
Bing Huan Xia ◽  
Yan Bo Lu
Keyword(s):  
Rheological Properties ◽  
Pour Point ◽  
Saturation Pressure ◽  
Saturation Temperature ◽  
Dilution Effect ◽  
Crude Oils ◽  
Gas Oil ◽  
Dissolved Gas ◽  
Light Alkanes ◽  
Abnormal Point

Multiphase transportation of the wellhead product in a single pipeline is widely used in oilfields. The oil samples transported in the multiphase pipeline are often live oils saturated by light alkanes. To support the multiphase pipelining more efficiently, in this paper, the solubility and rheology of Chang10 live crude oils are studied at the pressures range from 0 to 2.0 MPa. It was found that the dissolved gas in the live oils is mainly composed of methane (32.70 vol% at 1MPa), ethane (19.43 vol% at 1MPa), propane (21.42 vol% at 1MPa) and C4+ component (22.50 vol% at 1 MPa). The gas-oil ratio, Rs, of the live oils increases rapidly with the increase of saturation pressure. However, the effect of saturation temperature on Rs is very small. The pour point, abnormal point, WAT, viscosity/equilibrium viscosity and yield stress of the live oils decrease obviously with the increase of saturation pressure, meaning that the rheological properties of the live oils improve greatly by gas dissolving. The rheological properties of the live oils are improved mainly by the dilution effect of the dissolved gas.

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