نتایج جستجو برای: fdm

تعداد نتایج: 1979  

Journal: :Arquivos brasileiros de cardiologia 2004
Paulo Zielinsky Silvana Marcantonio Luiz Henrique Nicoloso Stelamaris Luchese Domingos Hatem Marlui Scheid João Luiz Mânica Eduardo Ioschpe Gus Fabíola Satler Antônio L Piccoli

OBJECTIVE To test the hypothesis that the pulsatility index of ductus venosus (PIDV) is greater in the fetuses of diabetic mothers (FDM) with myocardial hypertrophy (MH) than in the FDM with no MH and in the control fetuses of nondiabetic mothers (FNDM). Comparing the results with mitral and tricuspid diastolic peak flows. METHODS The cross-sectional study included fetuses with gestational ag...

2003
Dinghui Yang Jiwen Teng Zhongjie Zhang Enru Liu

We transform the seismic wave equations in 2D inhomogeneous anisotropic media into a system of first-order partial differential equations with respect to time t. Based on the transformed equations, a new nearly analytic discrete method (NADM) is developed in this article. Our method enables wave propagation to be simulated in two dimensions through generally anisotropic and heterogeneous models...

2014
Ping Liu Joey Tianyi Zhou Ivor W. Tsang Zibo Meng Shizhong Han Yan Tong

Studies in psychology show that not all facial regions are of importance in recognizing facial expressions and different facial regions make different contributions in various facial expressions. Motivated by this, a novel framework, named Feature Disentangling Machine (FDM), is proposed to effectively select active features characterizing facial expressions. More importantly, the FDM aims to d...

Journal: :Journal of magnetic resonance 2005
Geoffrey S Armstrong Vladimir A Mandelshtam A J Shaka Brad Bendiak

Four-dimensional nuclear magnetic resonance spectroscopy with high resolution of signals in the indirect dimensions is reported as an implementation of the filter diagonalization method (FDM). Using an oligosaccharide derivatized with 13C-labeled acetyl isotags, a four-dimensional constant-time pulse sequence was tailored for conjoint use with the FDM. Results demonstrate that high resolution i...

2016
Bing Li Xiumei Luo Tao Li Changyue Zheng Shunmei Ji Yuanyuan Ma Shuangshuang Zhang Xiaodong Zhou

PURPOSE To investigate the effects of constant flickering light on refractive development, the role of serotonin (i.e.5-hydroxytryptamine, 5-HT)and 5-HT2A receptor in myopia induced by flickering light in guinea pigs. METHODS Forty-five guinea pigs were randomly divided into three groups: control, form deprivation myopia (FDM) and flickering light induced myopia (FLM) groups(n = 15 for each g...

Journal: :Cancer research 2007
Kuei C Lee Sudha Sud Charles R Meyer Bradford A Moffat Thomas L Chenevert Alnawaz Rehemtulla Kenneth J Pienta Brian D Ross

Prostate cancer ranks as the most common lethal malignancy diagnosed and the second leading cause of cancer mortality in American men. Although high response rates are achieved using androgen blockade as first-line therapy, most men progress toward hormone-refractory prostate cancer. Systemic chemotherapies have been shown to improve clinical outcome in hormone refractory prostate cancer patien...

2017
Harmeet Singh Jps Oberoi Rajmeet Singh Haiou Zhang Xinhong Xiong

Fused Deposition modelling (FDM) technology is based on decomposition of 3-D computer models into thin cross sectional layers, followed by physically forming the layer and stacking them up layer by layer. FDM provide freedom to add material in the desired area and we are also able to create hollow region in certain portion of layer. In this way low weight with good strength single ply raw mater...

2006
Yizhuo Zhang Kevin Chou

We developed a finite element model to simulate the fused deposition modeling (FDM) process. The model considers the coupled thermal and mechanical analysis and incorporates the element activation function to mimic the additive nature of FDM. Due to repetitive heating and cooling in the FDM process, residual stresses accumulate inside the part during the deposition. The model is also used to ev...

Chloride-induced corrosion is a key factor in the premature corrosion of concrete structures exposed to a marine environment. Fick's second law of diffusion is the dominant equation to model diffusion of chloride ions. This equation is traditionally solved by Finite Element Method (FEM) and Finite Difference Method (FDM). Although these methods are robust and efficient, they may face some numer...

2015
F. Knoop V. Schoeppner

Fused Deposition Modeling (FDM) is an Additive Manufacturing (AM) technology which is used for prototypes, single-part production and also small batch productions. For use as a final product, it is important that the parts have good mechanical properties, high dimensional accuracy and smooth surfaces. The knowledge of the mechanical properties is very important for the design engineer when it c...

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