Direct Modeling of Structures and Segregations Up to Industrial Casting Scales

JOM ◽  
2013 ◽  
Vol 65 (9) ◽  
pp. 1122-1130 ◽  
Author(s):  
Ch.-A. Gandin ◽  
T. Carozzani ◽  
H. Digonnet ◽  
S. Chen ◽  
G. Guillemot
Keyword(s):  
Direct Modeling

Designing Forging and Die Tooling for the Manufacture of Turbine Engine Compressor Blades in Siemens NX

2016 ◽  
Vol 684 ◽  
pp. 497-506 ◽  
Author(s):  
D.S. Goryainov ◽  
V.V. Anokhin ◽  
Aleksey Shlyapugin
Keyword(s):  
Point Cloud ◽  
Compressor Blade ◽  
Compressor Blades ◽  
Turbine Engine ◽  
Direct Modeling ◽  
Engine Compressor ◽  
Data Source ◽  
Theoretical Contour ◽  
Gas Turbine Compressor ◽  
Complex Parts

For designing forging and die tooling for bulk forging a necessity in using the data of the geometry of the part produced arises. Obviously, the use as a data source for designing drawings of commonly applied in “manual alternate design” (without a computer) especially such complex parts as compressor blades is not perspective because of the complexity of developing theoretical contour specified by a point cloud. In this case the use of special tooling of direct modeling that provides changing the original model of the part developed by the designers is a perspective one. It should be taken into account during the process of forging and die tooling designing that it is necessary to register the special features of the technology, upon that, the technologist should be highly proficient in using the software. The work given describes the designing technique of gas turbine compressor blade with the account of using the potential of NX Siemens program.

Evaluating SIR in 3D Millimeter-Wave Deployments: Direct Modeling and Feasible Approximations

2019 ◽  
Vol 18 (2) ◽  
pp. 879-896 ◽  
Author(s):  
Roman Kovalchukov ◽  
Dmitri Moltchanov ◽  
Andrey Samuylov ◽  
Aleksandr Ometov ◽  
Sergey Andreev ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Direct Modeling

scholarly journals Direct modeling of the crude probability of cancer death and the number of life years lost due to cancer without the need of cause of death: a pseudo-observation approach in the relative survival setting

Biostatistics ◽  
2020 ◽  
Author(s):  
Dimitra-Kleio Kipourou ◽  
Maja Pohar Perme ◽  
Bernard Rachet ◽  
Aurelien Belot
Keyword(s):  
Cause Of Death ◽  
Relative Survival ◽  
Population Based ◽  
Subdistribution Hazard ◽  
Cancer Data ◽  
Regression Parameters ◽  
Life Years ◽  
Direct Modeling ◽  
Life Years Lost ◽  
Probability Of Cancer

Summary In population-based cancer studies, net survival is a crucial measure for population comparison purposes. However, alternative measures, namely the crude probability of death (CPr) and the number of life years lost (LYL) due to death according to different causes, are useful as complementary measures for reflecting different dimensions in terms of prognosis, treatment choice, or development of a control strategy. When the cause of death (COD) information is available, both measures can be estimated in competing risks setting using either cause-specific or subdistribution hazard regression models or with the pseudo-observation approach through direct modeling. We extended the pseudo-observation approach in order to model the CPr and the LYL due to different causes when information on COD is unavailable or unreliable (i.e., in relative survival setting). In a simulation study, we assessed the performance of the proposed approach in estimating regression parameters and examined models with different link functions that can provide an easier interpretation of the parameters. We showed that the pseudo-observation approach performs well for both measures and we illustrated their use on cervical cancer data from the England population-based cancer registry. A tutorial showing how to implement the method in R software is also provided.

A generalization of the GM(1,1) direct modeling method with a step by step optimizing grey derivative's whiten values and its applications

Kybernetes ◽  
2004 ◽  
Vol 33 (2) ◽  
pp. 382-389 ◽  
Author(s):  
Wang Yinao ◽  
Chen Zhijie ◽  
Gao Zhiqiang ◽  
Chen Mianyun
Keyword(s):  
Modeling Method ◽  
Direct Modeling

scholarly journals The Degree of Abstraction in Solving Addition and Subtraction Problems

2007 ◽  
Vol 10 (2) ◽  
pp. 285-293 ◽  
Author(s):  
Vicente Bermejo ◽  
Juan José Díaz
Keyword(s):  
Developmental Stage ◽  
Primary Education ◽  
First Graders ◽  
Fourth Grade ◽  
First Grade ◽  
Second Graders ◽  
School Grade ◽  
Levels Of Abstraction ◽  
Direct Modeling ◽  
Addition And Subtraction

In this study, the incidence of the degree of abstraction in solving addition and subtraction problems with the unknown in the first term and in the result is analyzed. Ninety-six students from first grade to fourth grade in Primary Education (24 students per grade) solved arithmetic problems with objects, drawings, algorithms, and verbal problems. The participants were interviewed individually and all sessions were video-taped. The results indicate a different developmental pattern in achievement for each school grade depending on the levels of abstraction. The influence of the level of abstraction was significant, especially in first graders, and even more so in second graders, that is, at the developmental stage in which they start to learn these arithmetic tasks. Direct modeling strategies are observed more frequently at the concrete and pictorial level, counting strategies occur at all levels of abstraction, whereas numerical fact strategies are found at higher levels of abstraction.

Direct Modeling of Reservoirs Through Forward Process-Based Models: Can We Get There?

2008 ◽  
Author(s):  
James Miller ◽  
Tao Sun ◽  
Hongmei Li ◽  
Jonathon Stewart ◽  
Coralie Genty ◽  
...  
Keyword(s):  
Direct Modeling ◽  
Forward Process ◽  
Process Based Models
Sign in / Sign up

Export Citation Format

Share Document