Analysis on dynamic precision reliability of high-speed precision press based on Monte Carlo method

2017 ◽  
Vol 90 (4) ◽  
pp. 2979-2988 ◽  
Author(s):  
Maohua Xiao ◽  
Guosheng Geng ◽  
Guohong Li ◽  
Hao Li ◽  
Runnan Ma
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
High Speed ◽  
Dynamic Precision

scholarly journals TI-ADC multi-channel mismatch estimation and calibration in ultra-high-speed optical signal acquisition system

2021 ◽  
Vol 18 (6) ◽  
pp. 9050-9075
Author(s):  
Yongjie Zhao ◽  
◽  
Sida Li ◽  
Zhiping Huang
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
High Speed ◽  
Dynamic Range ◽  
Optical Signal ◽  
Estimation Accuracy ◽  
Signal Acquisition ◽  
Analog To Digital ◽  
Channel Mismatch ◽  
Background Mode

<abstract> <p>This article presents a method to calibrate a 16-channel 40 GS/s time-interleaved analog-to-digital converter (TI-ADC) based on channel equalization and Monte Carlo method. First, the channel mismatch is estimated by the Monte Carlo method, and equalize each channel to meet the calibration requirement. This method does not require additional hardware circuits, every channel can be compensated. The calibration structure is simple and the convergence speed is fast, besides, the ADC is worked in background mode, which does not affect the conversion. The prototype, implemented in 28 nm CMOS, reaches a 41 dB SFDR with an input signal of 1.2 GHz and 5 dBm after the proposed background offset and gain mismatch calibration. Compared with previous works, the spurious-free dynamic range (SFDR) and the effective number of bits (ENOB) are better, the estimation accuracy is higher, the error is smaller and the faster speed of convergence improves the efficiency of signal processing.</p> </abstract>

Working Space Analysis and Simulation of Modular Service Robot Arm Based on Monte Carlo Method

2010 ◽  
Vol 34-35 ◽  
pp. 1104-1108 ◽  
Author(s):  
Bin He ◽  
Xiao Lin He ◽  
Li Zhi Han ◽  
Jin Tao Cao ◽  
Ming Li ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
High Speed ◽  
High Efficiency ◽  
Simulation Analysis ◽  
Service Robot ◽  
Robot Arm ◽  
Robot System ◽  
Space Model ◽  
Working Space

Robot working space is an important kinematic indicator. After the modular service robot arm was introduced, DH coordinate system was used to build kinematics equations of 5-DOFs services robot arm. The whole working space model of the robot system was then established. Monte Carlo method was used to simulate the working space, which can straightforwardly and visually describe the working space of robot with high speed. It was indicated that the working points in the workspace of the robot were distributed compactly and uniformly, which can meet design requirements with high efficiency. The effectiveness of the working space model was testified by the simulation analysis on Matlab and experimental validation.

scholarly journals Reliability analysis of crankshaft for high-speed punch based on Monte-Carlo method

2017 ◽  
Vol 250 ◽  
pp. 012063
Author(s):  
Xinzhou Zhang ◽  
Lan Chen ◽  
Shuyuan Gan ◽  
Yuan Wang ◽  
Naifei Ren ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Reliability Analysis ◽  
High Speed

Outbursts of comet Schwassmann-Wachmann 1, and the cloud of interplanetary boulders

1974 ◽  
Vol 22 ◽  
pp. 307 ◽  
Author(s):  
Zdenek Sekanina
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Interplanetary Space ◽  
Porous Matrix ◽  
Maximum Diameter ◽  
Expansion Velocity ◽  
Solid Constituent ◽  
Meteoric Material ◽  
Periodic Comet

AbstractIt is suggested that the outbursts of Periodic Comet Schwassmann-Wachmann 1 are triggered by impacts of interplanetary boulders on the surface of the comet’s nucleus. The existence of a cloud of such boulders in interplanetary space was predicted by Harwit (1967). We have used the hypothesis to calculate the characteristics of the outbursts – such as their mean rate, optically important dimensions of ejected debris, expansion velocity of the ejecta, maximum diameter of the expanding cloud before it fades out, and the magnitude of the accompanying orbital impulse – and found them reasonably consistent with observations, if the solid constituent of the comet is assumed in the form of a porous matrix of lowstrength meteoric material. A Monte Carlo method was applied to simulate the distributions of impacts, their directions and impact velocities.

Structures and crystallization of vacuum-deposited amorphous Se and Sb films

1990 ◽  
Vol 48 (4) ◽  
pp. 140-141
Author(s):  
Makoto Shiojiri ◽  
Toshiyuki Isshiki ◽  
Tetsuya Fudaba ◽  
Yoshihiro Hirota
Keyword(s):  
Monte Carlo ◽  
Electron Microscope ◽  
Monte Carlo Method ◽  
Computer Program ◽  
Radial Distribution ◽  
Film Formation ◽  
Amorphous State ◽  
Two Dimensional ◽  
Amorphous Films ◽  
Binding Condition

In hexagonal Se crystal each atom is covalently bound to two others to form an endless spiral chain, and in Sb crystal each atom to three others to form an extended puckered sheet. Such chains and sheets may be regarded as one- and two- dimensional molecules, respectively. In this paper we investigate the structures in amorphous state of these elements and the crystallization.HRTEM and ED images of vacuum-deposited amorphous Se and Sb films were taken with a JEM-200CX electron microscope (Cs=1.2 mm). The structure models of amorphous films were constructed on a computer by Monte Carlo method. Generated atoms were subsequently deposited on a space of 2 nm×2 nm as they fulfiled the binding condition, to form a film 5 nm thick (Fig. 1a-1c). An improvement on a previous computer program has been made as to realize the actual film formation. Radial distribution fuction (RDF) curves, ED intensities and HRTEM images for the constructed structure models were calculated, and compared with the observed ones.

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