Prostate Localization in 2D Sequence MR with Fusion of Center Position Prior and Sequence Correlation

2020 ◽  
Author(s):  
Zhiying Lu ◽  
Mingyue Zhao ◽  
Yang Xiao ◽  
Yong Pang
Keyword(s):  
Sequence Correlation ◽  
Center Position

Detection of Vehicle Tripped and Untripped Rollovers by a Novel Index With Mass-Center-Position Estimations

2017 ◽  
Author(s):  
Fengchen Wang ◽  
Yan Chen
Keyword(s):  
Load Transfer ◽  
Center Of Mass ◽  
Roll Motion ◽  
Mass Center ◽  
Motion Models ◽  
Center Position ◽  
Before And After ◽  
Vehicle Rollover ◽  
Lift Off ◽  
Rollover Index

This paper presents a novel mass-center-position (MCP) metric for vehicle rollover propensity detection. MCP is first determined by estimating the positions of the center of mass of one sprung mass and two unsprung masses with two switchable roll motion models, before and after tire lift-off. The roll motion information without saturation can then be provided through MCP continuously. Moreover, to detect completed rollover statues for both tripped and untripped rollovers, the criteria are derived from d’Alembert principle and moment balance conditions based on MCP. In addition to tire lift-off, three new rollover statues, rollover threshold, rollover occurrence, and vehicle jumping into air can be all identified by the proposed criteria. Compared with an existing rollover index, lateral load transfer ratio, the fishhook maneuver simulation results in CarSim® for an E-class SUV show that MCP metric can successfully predict the vehicle impending rollover without saturation for untripped rollovers. Tripped rollovers caused by a triangle road bump are also successfully detected in the simulation. Thus, MCP metric can be successfully applied for rollover propensity prediction.

Excimer emission based on the control of molecular structure and intermolecular interactions

2016 ◽  
Vol 4 (14) ◽  
pp. 2784-2792 ◽  
Author(s):  
Jaehyun Lee ◽  
Hyocheol Jung ◽  
Hwangyu Shin ◽  
Joonghan Kim ◽  
Daisuke Yokoyama ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Intermolecular Interactions ◽  
Excimer Emission ◽  
Oled Device ◽  
Center Position ◽  
Excimer Formation

The wavelength of excimer formation and efficiency of an OLED device were controlled through the change of the center position of the triple-core chromophore.

Detection of a Crank in the Stephenson-Ш Six-Bar Linkage

2011 ◽  
Vol 52-54 ◽  
pp. 909-914
Author(s):  
Yan Huo Zou ◽  
Jin Kui Chu ◽  
Xiao Ning Guo
Keyword(s):  
Circuit Analysis ◽  
New Method ◽  
Mechanism Synthesis ◽  
Center Position

Detecting the existence of a crank in the Stephenson-Ш six-bar linkage is one of the most difficult problems encountered in the mechanism synthesis. Based on the model established for the circuit analysis of the Stephenson six-bar chains, through judging whether there is a dead-center position in the circuits of this linkage, this paper presents a new method for identifying the existence of a crank in the Stephenson-Ш six-bar linkage. Some examples are given to demonstrate the validity of this method.

Method for Radiation Center Position Measurements of a Combined Antenna in the Pulsed Mode

2018 ◽  
Vol 66 (8) ◽  
pp. 4269-4276 ◽  
Author(s):  
Yury A. Andreev ◽  
Vladimir N. Kornienko ◽  
Shuhua Liu
Keyword(s):  
Radiation Center ◽  
Pulsed Mode ◽  
Center Position

scholarly journals Effect of Mass-Center Position of Spinal Segment on Dynamic Performances of Quadruped Bounding with a Flexible-Articulated Spine

2020 ◽  
Vol 10 (4) ◽  
pp. 1491
Author(s):  
Shun Zeng ◽  
Yuegang Tan ◽  
Zhang Li ◽  
Ping Wu ◽  
Tianliang Li ◽  
...  
Keyword(s):  
Hip Joint ◽  
Stride Length ◽  
Mass Center ◽  
Spinal Segment ◽  
High Speeds ◽  
Geometric Center ◽  
Center Position ◽  
Dynamic Performances ◽  
Fast Movement ◽  
All Speeds

Driven by the layout design of devices arranged on the spine of quadruped robot which has a symmetry spine with a flexible joint, we explore the effect of mass-center position of spinal segment (MCPSS) on dynamic performances of quadruped bounding. A simplified model is introduced with MCPSS set as an independent parameter. Periodically quadruped bounding motions are generated to calculate different dynamic performances related to different MCPSS at the low, medium, and high horizontal speeds, respectively. The results indicate MCPSS corresponding to the optimal or suboptimal dynamic performances mainly gather at two positions: the hip joint and the geometric center of spinal segment. MCPSS near the hip joint leads to the largest stride period, stride length, and spinal oscillation-margin at all speeds. The smallest duty factor can also be obtained at the medium and high speeds. These improved inherent characteristics offer advantages in leg-orientation control and fast movement effectively. MCPSS near the geometric center of spinal segment brings the best self-stability, the smallest mass-center vertical fluctuation, and the smallest maximum foot-end force at all speeds, which should greatly enhance resistances to vertical jitters and reduce torque-demands of joint-drivers. This study should give useful suggestions to robot designs in reality.

The Temperature Distribution Research of Foaming Gypsum Mold in the Fabrication and Pouring Process

2013 ◽  
Vol 652-654 ◽  
pp. 1185-1190
Author(s):  
Zhen Zhong Fan ◽  
Yan Cai Xiong ◽  
Run Zhou Hong
Keyword(s):  
Temperature Difference ◽  
Molten Aluminum ◽  
Initial Period ◽  
Convection Heat Transfer ◽  
Solidification Process ◽  
Rapid Decline ◽  
Difference Curve ◽  
Gypsum Mold ◽  
Center Position ◽  
Molten Aluminum Alloy

This paper describes study of temperature variation in the gelling and hardening, thermal baking and pouring stage of foaming gypsum mold. The temperature difference curve in the gelling and hardening process shows an rapid decline, tending to the placid downward eventually after a clipping rise. During the thermal baking stage, owing to the low heat conduction coefficient of the foaming gypsum mold, the actual temperature of each thermocouple lags behind the craft temperature, lag degree increases gradually with the extension of baking temperature and holding time. At the initial period of pouring process for molten aluminum, the temperature of center position in the mold increases fast by absorbing lots of heat in the solidification process, whereas, slower temperature rising curve occurs in the edge and intersection position. Coupled with the ongoing of air convection heat transfer, resulting in a continuous falling of temperature, therefore the temperature difference curve of each point inside the mold shows a successive upward trend with the solidification process of molten aluminum alloy.

scholarly journals Optimization of the UWB Feed Antenna Position in Reflector Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Nurhan Türker Tokan
Keyword(s):  
High Performance ◽  
Phase Error ◽  
Design Procedure ◽  
Reflector Antenna ◽  
Slot Antenna ◽  
Stable Phase ◽  
Phase Center ◽  
Center Position ◽  
Reflector System ◽  
Novel Method

In reflector system design, achieving high stability of phase center position with changes in frequency in reflector feed antennas is highly desired. However, obtaining highly stable phase center is not possible for UWB feed antennas, specially for planar ones. Thus, an optimum positioning for the UWB feed antenna should be defined. Optimization of the positioning of the feed antenna is essential since this process lowers resulting phase error losses significantly. In this work, a novel method for optimizing the UWB feed position of a prime focus reflector antenna from phase and amplitude recordings of the measured radiated field is introduced. An automatic and fast design procedure, based on Genetic Algorithms, is described. The proposed methodology has been numerically and experimentally assessed. The procedure is introduced by an application example to one of the most commonly used UWB feed antennas in high-performance reflector antenna systems: Linear Tapered Slot Antenna (LTSA). A LTSA antenna operating in 6–25 GHz frequency band is designed and manufactured. The performance of the method is quantified in terms of its phase error losses inE- andH-planes for reflector illumination.

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