Geometric modeling

Bài giảng Mô hình hóa bề mặt (Surface modeling) - Bài 5: Ứng dụng mô hình bề mặt địa hình. Nội dung chính trong bài giảng gồm có: Định nghĩa phân tích bề mặt địa hình (interpretation of terrain model), phân loại các thông số địa hình (classification of terrain parameters), thông số hình học (geometric terrain parameters), thông số hình thái (morphological terrain parameters), thông số nhìn (visibility terrain parameters). Mời các bạn cùng tham khảo!

48p zizaybay1107 19-07-2024 5 1   Download

Bài giảng CAD/CAM/CNC - Bài 4.1: Mô hình hóa hình học cung cấp cho sinh viên những nội dung gồm: đặt vấn đề; mô hình 2D; mô hình khung dây 3D; mô hình mặt 3D; mô hình khối 3D;... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

18p mothuahoa 04-05-2024 4 1   Download

Bài giảng CAD/CAM/CNC - Bài 4.2: Mô hình hóa hình học cung cấp cho sinh viên những nội dung gồm: khái quát; phương pháp kết cấu; phương pháp biên; các phương pháp khác;... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

16p mothuahoa 04-05-2024 5 1   Download

This thesis derives closed form equations to describe electromagnetic device characteristics for a toroid, solenoid and a case study induction machine. By considering stored magnetic field energy, this approach allows the relationship between electrical, magnetic and kinetic energy to be quantified and analyzed in ways that allows improved accuracy compared with conventional magnetic circuit modeling methods. This thesis also provides insights into how geometric parameters impact energy transfer and operational characteristics of electromagnetic devices.

112p runthenight04 02-02-2023 10 2   Download

The current research is undertaken by performing Computational Fluid Dynamics (CFD) simulations for a 2D aerofoil fitted with a shock control bump at a transonic flow condition. Reynolds-Averaged Navier-Stokes equation coupled with turbulence models is adopted to solve the flowfield. The bump has a conventional geometric feature which consists of a ramp, a crest and a tail, and it has eight variants for which the designed parameters are reasonably specified according to the compressible aerodynamics theory.

84p runthenight04 02-02-2023 8 3   Download

Equivalent inclusion approach is then developed to account for possible diversions, such as non-idealistic geometric forms of the inhomogeneities, imperfect matrix-inclusion contacts, filler dispersions, and when the particular values of the fillers’ properties are unspecified, using available numerical or experimental reference conductivity data for particular composites.

28p capheviahe27 23-02-2021 26 4   Download

Doctoral dissertation present the content: point cloud representation and the proposed method for table plane detection; primitive shapes estimation by a new robust estimator using geometrical constraints; detection and estimation of a 3-D object model for a real application; conclusion and future works.

159p gaocaolon6 30-07-2020 28 3   Download

In the present work, the thermal hydraulic RELAP5-3D code was used to develop a model of this reactor. The model was performed using geometrical and material data from the Angra 2 final safety analysis report (FSAR).

8p christabelhuynh 31-05-2020 22 1   Download

In this document, we present a simplified geometrical model (0D model) for the in-core corium propagation transient. A degraded core with a formed corium pool is used as an initial state. This state can be obtained from a simulation computed with an integral code.

9p christabelhuynh 30-05-2020 5 0   Download

In this study, we incorporate trade credit policy into a joint marketing and pricing problem in which demand rate depends on the length of the credit period provided by the retailer for her customers, marketing expenditure, and selling price.

16p tocectocec 24-05-2020 21 2   Download

This work shows a free-body model for tolerance analysis, that uses the force free-body diagrams and the functional equations’ sensitivities, by simulating the geometrical tolerances together with the dimensional ones.

12p tohitohi 19-05-2020 10 2   Download

In this paper, the first and second stage compressor blades of a gas turbine were studied by the experimental and numerical modal analyses.

14p tohitohi 19-05-2020 15 2   Download

Simulation and visualization of the mechanical components have become a predominant phase during the design and the production stages. Several means are used to improve the design and to reduce study time.

8p tohitohi 19-05-2020 20 3   Download

This thesis aims to develop finite element models for studying vibration of the 2D-FGM beam. These models require high reliability, good convergence speed and be able to evaluate the influence of material parameters, geometric parameters as well as being able to simulate the effect of shear deformation on vibration characteristics and dynamic responses of the 2D-FGM beam.

27p xacxuoc4321 08-07-2019 52 8   Download

The stochastic 2D Navier-Stokes equations on the torus driven by degenerate noise are studied. We characterize the smallest closed invariant subspace for this model and show that the dynamics restricted to that subspace is ergodic. In particular, our results yield a purely geometric characterization of a class of noises for which the equation is ergodic in L2 (T2 ). Unlike previous 0 works, this class is independent of the viscosity and the strength of the noise.

41p noel_noel 17-01-2013 48 9   Download

The purpose of this paper is to carry out the abelianization program proposed by Atiyah [1] and Hitchin [9] for the geometric quantization of SU(2) Wess-Zumino-Witten model. Let C be a Riemann surface of genus g. Let Mg be the moduli space of semi-stable rank 2 holomorphic vector bundles on C with trivial determinant. For a positive integer k, let Γ(Mg , Lk ) be the space of holomorphic sections of the k-th tensor product of the determinant line bundle L on Mg . An element of Γ(Mg , Lk ) is called a rank 2 theta function...

50p noel_noel 17-01-2013 62 8   Download

In this paper we present the solution to a longstanding problem of differential geometry: Lie’s third theorem for Lie algebroids. We show that the integrability problem is controlled by two computable obstructions. As applications we derive, explain and improve the known integrability results, we establish integrability by local Lie groupoids, we clarify the smoothness of the Poisson sigma-model for Poisson manifolds, and we describe other geometrical applications. Contents 0. Introduction

47p tuanloccuoi 04-01-2013 45 7   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Geometrical Three-Ring-Based Model for MIMO Mobile-to-Mobile Fading Channels in

13p sting05 10-02-2012 53 11   Download

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài:"Polyhedral representation of crown shape. A geometric tool for growth modelling...

10p toshiba7 08-10-2011 40 3   Download

Solid modeling (or modelling) is a consistent set of principles for mathematical and computer modeling of three dimensional solids. Solid modeling is distinguished from related areas of Geometric modeling and Computer graphics by its emphasis on physical fidelity [1]. Together, the principles of geometric and solid modeling form the foundation of Computer-aided design and in general support the creation, exchange, visualization, animation, interrogation, and annotation of digital models of physical objects....

19p xuanchienhui 12-05-2010 112 20   Download