General dynamics

The paper generalizes one practical tool for analyzing the structural dynamics for the high-speed railway bridge based on Cast3M open-source. Compared with the classical approach with the analytical formulation, KD-Railway developed by the finite element method allows defining the structure with complex geometry and considering a different type of structure (truss, cable, hybrid composite) or the structure-soil interaction.

10p viengfa 28-10-2024 2 1   Download

This paper develops an Artificial Neural Network (ANN) model based on 96 experimental data to forecast the dynamic modulus of asphalt concrete mixtures. This study applied the repeated KFold cross-validation technique with 10 folds on the training data set to make the simulation results more reliable and find a model with more general predictive power.

9p viengfa 28-10-2024 4 1   Download

Bài giảng Phân tích số liệu mảng - Chương 5: Dynamic panel model. Chương này cung cấp cho sinh viên những nội dung gồm: giới thiệu về Dynamic panel model; ước tính hiệu ứng cố định và ngẫu nhiên; ước tính biến công cụ (phương pháp IV) (Anderson và Hsiao, 1982); 2SLS, phương pháp tiếp cận mô men tổng quát (GMM) (Arenalloand Bond, 1985);... Mời các bạn cùng tham khảo!

32p caongulam 10-11-2023 7 5   Download

The increasing use of Intelligent Transport System (ITS) can enable very close vehicle spacings which generally results in a net drag reduction for the resulting convoys. The majority of vehicle development has, to date, been for vehicles in isolation, thus the study of interaction effects is becoming increasingly important. The main objective of this research is to investigate the use of Computational Fluid Dynamics (CFD) for understanding convoy aerodynamics and to further the understanding of airflow interaction between vehicles via CFD.

154p runthenight07 01-03-2023 7 3   Download

Teaching Physics in high schools is associated with teaching and solving exercises, thereby forming and developing for students major qualities and general competencies; at the same time, preventing and avoiding for students some common mistakes.

7p vivelvet2711 08-09-2021 17 1   Download

General objective: To contribute to understanding the rules and structural dynamics of evergreen broadleaf natural forests as a basis for proposing some solutions for sustainable forest management.

27p capheviahe27 23-02-2021 10 3   Download

Cutouts are commonly used as access port for mechanical and electrical structures. Most of the tructures generally work under severe dynamic loading and different constrained conditions during their service life. This may lead to vibration of the structure.

8p tohitohi 19-05-2020 14 3   Download

Objectives of the thesis: The thesis will focus on studying the dynamic behavior of a planar mechanism which has one or more elastic bars, such as calculating the elastic deformation of the links, and assessing the effect of the deformation back on the movement of the structure during the work. The ultimate goal is to help minimize the negative impact of the elastic vibrations as well as limiting the elastic vibrations.

27p xacxuoc4321 09-07-2019 47 4   Download

Bài nghiên cứu này sử dụng mô hình cân bằng động ngẫu nhiên tổng quát (dynamic stochastic general equilibrium- DSGE) mô phỏng mối quan hệ giữa các biến kinh tế vĩ mô chính của Việt Nam từ đó ứng dụng để phân tích tổng cầu tại Việt Nam. Trong đó, phân tích hàm phản ứng của biến chênh lệch sản lượng (output gap, biến thể đại diện cho GDP) khi có các cú shocks từ mô hình DSGE cho thấy có sự phù hợp với lý thuyết kinh tế cũng như các nghiên cứu trước đây.

4p visatori2711 20-04-2019 101 9   Download

The robot equations of motion are obtained from the implemented program and verified against those obtained using only Lagrange equation. The output of program for the 3 DOF robot was used to find the optimal torque using analytical optimization analysis for a given set of parameters. This procedure analysis can be used as a benchmark analysis for any optimization technique.

5p cathydoll5 27-02-2019 25 2   Download

Bài viết này nhằm mục tiêu cải tiến thuật toán song song dùng cho mô hình hoàn lưu tổng quát của khí quyển (AGCM) để nâng cao hiệu năng tính toán. Đặc biệt là việc khai thác cân bằng tải khi số nút tính toán lớn, nguồn tài nguyên tính toán không đồng nhất. Sự cải tiến thể hiện qua việc khai thác đồng thời 2 nhóm bộ xử lý, tương ứng với hai khối physics và dynamics trên cùng dữ liệu

13p dieutringuyen 07-06-2017 44 3   Download

The paper proposes an empirical VAR for the UK open economy in order to measure the effects of monetary policy shocks from 1981 to 2003. The identification of the VAR structure is based on short-run restrictions that are consistent with the general implications of a New Keynesian model. The identification scheme used in the paper is successful in identifying monetary policy shocks and solving the puzzles and anomalies regarding the effects of monetary policy shocks.

37p pnq9292 14-03-2017 69 3   Download

Lecture "Marketing management - Chapter 11: Competitive dynamics" Expanding the total market, new ways to use a brand, market challenger strategies, general attack strategies, market follower strategies, niche specialist roles, maintaining a market advantage,... And other contents.

29p bautroibinhyen11 03-01-2017 42 4   Download

The purpose of this study was to investigate the operation of the Hoabinh reservoir in the Red River Basin of Vietnam, and assess the room for its improvement by application of system analysis and optimal control techniques. The study aimed at establishing a foundation for further research on inter-reservoir regulation of the Basin. Finally, this study provided a testing ground for developing and comparing dierent reservoir optimization methods.

138p xuanquachthi 08-06-2013 103 5   Download

Ambiguity in language translation is due to the presence of words in the source language with multiple non-synonymous target equivalents. A contextual analysis is required whenever a grammatical analysis fails to resolve such ambiguity. In the case of scientific and engineering literature, clues to the context can be obtained from a knowledge of the varying degrees of probability with which words occur in different fields of science.

5p nghetay_1 06-04-2013 37 3   Download

Let k be a local field, and Γ ≤ GLn (k) a linear group over k. We prove that Γ contains either a relatively open solvable subgroup or a relatively dense free subgroup. This result has applications in dynamics, Riemannian foliations and profinite groups. Contents 1. Introduction 2. A generalization of a lemma of Tits 3. Contracting projective transformations 4. Irreducible representations of non-Zariski connected algebraic groups 5. Proof of Theorem 1.3 in the finitely generated case 6. Dense free subgroups with infinitely many generators 7.

49p noel_noel 17-01-2013 55 7   Download

We prove the topological (or combinatorial) rigidity property for real polynomials with all critical points real and nondegenerate, which completes the last step in solving the density of Axiom A conjecture in real one-dimensional dynamics. Contents 1. Introduction 1.1. Statement of results 1.2. Organization of this work 1.3. General terminologies and notation 2. Density of Axiom A follows from the Rigidity Theorem 3. Derivation of the Rigidity Theorem from the Reduced Rigidity Theorem

94p noel_noel 17-01-2013 46 8   Download

Type IV secretion systems (T4SS) are macromolecular assemblies used by bacteria to transport material across their membranes. T4SS are generally composed of a set of twelve proteins (VirB1–11 and VirD4). This repre-sents a dynamic machine powered by three ATPases.

10p cosis54 05-01-2013 43 5   Download

The usual index theorems for holomorphic self-maps, like for instance the classical holomorphic Lefschetz theorem (see, e.g., [GH]), assume that the fixed-points set contains only isolated points. The aim of this paper, on the contrary, is to prove index theorems for holomorphic self-maps having a positive dimensional fixed-points set. The origin of our interest in this problem lies in holomorphic dynamics.

47p tuanloccuoi 04-01-2013 49 6   Download

We classify the measure theoretic attractors of general C 3 unimodal maps with quadratic critical points. The main ingredient is the decay of geometry. 1. Introduction 1.1. Statement of results. The study of measure theoretical attractors occupied a central position in the theory of smooth dynamical systems in the 1990s. Recall that a forward invariant compact set A is called a (minimal) metric attractor for some dynamics if the basin of attraction B(A) := {x : ω(x) ⊂ A} of A has positive Lebesgue measure and B(A ) has Lebesgue measure zero for every forward invariant compact set...

17p tuanloccuoi 04-01-2013 44 5   Download