Automatic Calculation Method for Mechanical Load of Full Rotation Crane Ship Based on Flow Function Theory

2020 ◽  
Vol 103 (sp1) ◽  
pp. 412
Author(s):  
Tingqin Lv ◽  
Haixia Du
Keyword(s):  
Calculation Method ◽  
Function Theory ◽  
Mechanical Load ◽  
Flow Function ◽  
Automatic Calculation ◽  
Full Rotation

Parametric Design of Parallel Indexing CAM Based on VB

2011 ◽  
Vol 411 ◽  
pp. 50-53
Author(s):  
Tian Xia ◽  
Peng Liu ◽  
Xiao Yang Jiang ◽  
Ying Huang
Keyword(s):  
Mathematical Model ◽  
Calculation Method ◽  
Parametric Design ◽  
Contour Line ◽  
Automatic Calculation ◽  
Cam Profile

Through the establishment of mathematical model of parallel indexing cam, a calculation method of the cam contour line is discovered. Then achieve automatic calculation about point in cam profile based on VB programming. Eventually output plots by SolidWorks.

A Method of Restoring the Fog Degraded Image Based on the Monochromatic Atmospheric Scattering Model

2012 ◽  
Vol 461 ◽  
pp. 849-853 ◽  
Author(s):  
Hui Ying Dong ◽  
He Bai ◽  
Xin Wei Wang
Keyword(s):  
Calculation Method ◽  
Automatic Calculation ◽  
Scattering Model ◽  
Atmospheric Scattering ◽  
Gray Image ◽  
Degraded Image ◽  
Scene Depth ◽  
Atmospheric Scattering Model

This paper introduces a method of restoring the fog degraded image based on the monochromatic atmospheric scattering model. On the base of the analysis of the monochromatic atmospheric scattering model, we can get the sky information of the fog image by using automatic calculation method. Through the scene depth method, we can restore the degenerated gray image. Because the brightness of the restored images is slipped, we enhance the brightness through enhancing the brightness based on the scene depth. The MATLAB experiments show that this method can efficiently restore the fog gray image.

scholarly journals Improvement of Automatic Calculation Method of CASE Bearing Capacity

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Guosong Liu ◽  
Junlin Wang
Keyword(s):  
Linear Regression ◽  
Bearing Capacity ◽  
Calculation Method ◽  
Static Load ◽  
High Strain ◽  
Load Test ◽  
Automatic Method ◽  
Static Load Test ◽  
Automatic Calculation ◽  
Capacity Calculation

Because of the reliance on the empirical parameter CASE damping coefficient Jc, the high-strain CASE method is not recommended. The automatic bearing capacity calculation method RAU can avoid this, but it cannot be applied to friction piles. Based on the analysis of the automatic calculation method of bearing capacity RAU, considering the influence of pile side soil resistance unloading, this paper improved the RAU method through the influence of pile side soil damping on the velocity of the pile mass point during the stress wave propagation process. In this paper, we compare the collected static load test results of test piles with the improved automatic method results. The unary linear regression analysis is carried out with the help of statistical tools. The unary linear regression of the improved automatic method bearing capacity results on the static load test bearing capacity results is established. The improved automatic method solves the problem that the RAU method is only applicable to end-bearing piles and can be applied to the quality analysis and bearing capacity calculation of the high-strain curve of the driven pile.

scholarly journals Automatic Calculation Method of Load Resonant Frequency of Photovoltaic Power Supply

2021 ◽  
Vol 15 ◽  
pp. 945-952
Author(s):  
Xinying Zhao ◽  
Kun Luo
Keyword(s):  
Steady State ◽  
Resonant Frequency ◽  
Resonance Frequency ◽  
Power Supply ◽  
Calculation Method ◽  
Power Supply System ◽  
Supply System ◽  
Normal Operation ◽  
Automatic Calculation ◽  
Photovoltaic Power

The resonance phenomenon of photovoltaic power supply load makes the output voltage of grid-connected photovoltaic power supply system difficult to keep stable, which brings trouble to power supply. Therefore, it is necessary to study the automatic calculation method of load resonance frequency of photovoltaic power supply, so as to detect the load resonance frequency of photovoltaic power supply in real time, thereby ensuring the normal operation of photovoltaic power supply system. The load resonance frequency of photovoltaic power supply is divided into steady-state load resonance frequency and dynamic load resonance frequency. The mathematical model of load resonant circuit of photovoltaic power supply is established by calculating algorithm of load resonant frequency of photovoltaic power supply in steady state, and load resonant frequency of photovoltaic power supply in steady state is calculated. The resonance detection algorithm based on wavelet transform and Hilbert-Huang transform is used to analyze and calculate the load resonance frequency after detecting the resonance signal of photovoltaic power system. The experimental results show that the resonant frequency of photovoltaic power supply load calculated by this method is not much different from the actual resonant frequency of photovoltaic power supply load, and the error range is between-0.30% and 0.49%. Therefore, this method can keep the load resonance frequency of the photovoltaic power supply the same as the RF transmission resonance frequency, and can ensure the normal operation of the photovoltaic power supply.

Thermal–mechanical coupled finite element analysis of aluminum alloy grid sheet in high-speed milling

2016 ◽  
Vol 231 (3) ◽  
pp. 389-398
Author(s):  
Zhao Liu ◽  
Weiping Peng ◽  
Lijie Guo ◽  
Fengbo Dong ◽  
Jiangwei Ma
Keyword(s):  
Finite Element ◽  
Calculation Method ◽  
High Speed ◽  
Tool Path ◽  
Mechanical Load ◽  
Depth Of Cut ◽  
Processing Scheme ◽  
High Speed Milling ◽  
Radial Depth ◽  
Load Calculation

Because of notable distortion in high-speed milling of grid sheet, it is difficult to choose a feasible processing scheme for this kind of workpiece. This article attempts to present a method to analyze the stress and deformation of grid sheet under different processing schemes based on a coupled mechanical–thermal finite element model, which provides a convenient and flexible platform to evaluate the performance of processing scheme in high-speed milling and optimize the cutting conditions. After a thorough analysis of the whole milling process of grid sheet, the tool path was discretized to make it convenient for the modeling of material removal process. An analytical thermal load calculation method and an experimental mechanical load calculation method were adopted to determine the loads exerted on the grid sheet. The constraint of the fixture was also considered, and finally, an ANSYS Parametric Design Language–based finite element method model was established. Based on this model, stresses and deformations under a given processing scheme with or without considering heat effect were compared, and it shows that cutting heat has great effect on the magnitude and distribution of deformation and stress. In addition, effects of some parameters on machining quality were investigated, and it was found that radial depth of cut has more impact than other parameters.

Brownian motion with quadratic killing and some implications

1986 ◽  
Vol 23 (04) ◽  
pp. 893-903 ◽  
Author(s):  
Michael L. Wenocur
Keyword(s):  
Brownian Motion ◽  
Weibull Distribution ◽  
Special Function ◽  
Function Theory ◽  
Killing Rate

Brownian motion subject to a quadratic killing rate and its connection with the Weibull distribution is analyzed. The distribution obtained for the process killing time significantly generalizes the Weibull. The derivation involves the use of the Karhunen–Loève expansion for Brownian motion, special function theory, and the calculus of residues.

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