Improving the Big Bang-Big Crunch Algorithm for Optimum Design of Steel Frames

2012 ◽  
Author(s):  
O. Hasançebi ◽  
S. Kazemzadeh Azad
Keyword(s):  
Optimum Design ◽  
Steel Frames ◽  
Big Bang ◽  
Big Crunch ◽  
The Big Bang

Optimum design of steel frames with semi-rigid connections using Big Bang-Big Crunch method

2013 ◽  
Vol 14 (5) ◽  
pp. 431-451 ◽  
Author(s):  
A. Rafiee ◽  
S. Talatahari ◽  
A. Hadidi
Keyword(s):  
Optimum Design ◽  
Steel Frames ◽  
Big Bang ◽  
Big Crunch

scholarly journals The Radiation-Dominated Universe in Nonstandard Cosmology

2020 ◽  
Vol 5 (4) ◽  
Author(s):  
Günter Scharf ◽  
Keyword(s):  
Evolution Equations ◽  
Big Bang ◽  
The Other ◽  
Spherically Symmetric ◽  
Velocity Perturbation ◽  
Model Universe ◽  
Cosmic Evolution ◽  
Big Crunch ◽  
The Big Bang ◽  
Irregular Singular Points

We continue the recent study of our model theory of low-density cosmology without dark matter. We assume a purely radiative spherically symmetric background and treat matter as anisotropic perturbations. Einstein’s equations for the background are solved numerically. We find two irregular singular points, one is the Big Bang and the other a Big Crunch. The radiation temperature continues to decrease for another 0.21 Hubble times and then starts to increase towards infinity. Then we derive the four evolution equations for the anisotropic perturbations. In the Regge- Wheeler gauge there are three metric perturbations and a radial velocity perturbation. The solution of these equations allow a detailed discussion of the cosmic evolution of the model universe under study.

scholarly journals THE BIG BANG AS THE ULTIMATE TRAFFIC JAM

2009 ◽  
Vol 18 (14) ◽  
pp. 2257-2263 ◽  
Author(s):  
VISHNU JEJJALA ◽  
MICHAEL KAVIC ◽  
DJORDJE MINIC ◽  
CHIA-HSIUNG TZE
Keyword(s):  
Matrix Theory ◽  
Geodesic Distance ◽  
Big Bang ◽  
Initial State ◽  
Final State ◽  
Physical Description ◽  
Infinite Dimensional ◽  
Big Crunch ◽  
Generally Covariant ◽  
The Big Bang

We present a novel solution to the nature and formation of the initial state of the Universe. It derives from the physics of a generally covariant extension of matrix theory. We focus on the dynamical state space of this background-independent quantum theory of gravity and matter — an infinite-dimensional, complex, nonlinear Grassmannian. When this space is endowed with a Fubini–Study-like metric, the associated geodesic distance between any two of its points is zero. This striking mathematical result translates into a physical description of a hot, zero-entropy Big Bang. The latter is then seen as a far-from-equilibrium, large-fluctuation-driven, metastable ordered transition — a "freezing by heating" jamming transition. Moreover, the subsequent unjamming transition could provide a mechanism for inflation while rejamming may model a Big Crunch, the final state of gravitational collapse.

scholarly journals Energy Efficient Motion Control for a Light Rail Vehicle Using The Big Bang Big Crunch Algorithm

2016 ◽  
Vol 49 (3) ◽  
pp. 442-446 ◽  
Author(s):  
Kemal Keskin ◽  
Abdurrahman Karamancioglu
Keyword(s):  
Motion Control ◽  
Energy Efficient ◽  
Big Bang ◽  
Light Rail ◽  
Rail Vehicle ◽  
Big Crunch ◽  
The Big Bang

Direct-space solution in theEXPOpackage: the combination of the HBB–BC algorithm with GRASP

2018 ◽  
Vol 51 (2) ◽  
pp. 505-513 ◽  
Author(s):  
Angela Altomare ◽  
Nicola Corriero ◽  
Corrado Cuocci ◽  
Aurelia Falcicchio ◽  
Anna Moliterni ◽  
...  
Keyword(s):  
Computation Time ◽  
Big Bang ◽  
Adaptive Search ◽  
Global Optimization Algorithm ◽  
New Approach ◽  
Structure Solution ◽  
Big Crunch ◽  
The Big Bang ◽  
The Universe ◽  
Annealing Method

The hybrid big bang–big crunch algorithm is a combination of a global optimization algorithm inspired by one of the theories of the evolution of the universe, named the big bang and big crunch theory, and the simulated annealing method. The procedure was implemented in the latest version of the programEXPOand applied to crystal-structure solution from powder diffraction data. Several aspects of the hybrid big bang–big crunch algorithm can be further optimized with the aim of obtaining good quality solutions in a shorter computation time. In the present study, the hybrid big bang–big crunch procedure has been combined with the greedy randomized adaptive search procedure (GRASP) and some steps of the algorithm have been improved. The new approach, implemented in theEXPOpackage, has been successfully tested on numerous known crystal structures.

scholarly journals Fast Tuning of the PID Controller in An HVAC System Using the Big Bang–Big Crunch Algorithm and FPGA Technology

Algorithms ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 146 ◽  
Author(s):  
Abdoalnasir Almabrok ◽  
Mihalis Psarakis ◽  
Anastasios Dounis
Keyword(s):  
Pid Controller ◽  
Power Efficiency ◽  
Size Control ◽  
Big Bang ◽  
Hvac System ◽  
Proportional Integral Derivative ◽  
Control Functions ◽  
Big Crunch ◽  
Evolution Algorithm ◽  
The Big Bang

This article presents a novel technique for the fast tuning of the parameters of the proportional–integral–derivative (PID) controller of a second-order heat, ventilation, and air conditioning (HVAC) system. The HVAC systems vary greatly in size, control functions and the amount of consumed energy. The optimal design and power efficiency of an HVAC system depend on how fast the integrated controller, e.g., PID controller, is adapted in the changes of the environmental conditions. In this paper, to achieve high tuning speed, we rely on a fast convergence evolution algorithm, called Big Bang–Big Crunch (BB–BC). The BB–BC algorithm is implemented, along with the PID controller, in an FPGA device, in order to further accelerate of the optimization process. The FPGA-in-the-loop (FIL) technique is used to connect the FPGA board (i.e., the PID and BB–BC subsystems) with the plant (i.e., MATLAB/Simulink models of HVAC) in order to emulate and evaluate the entire system. The experimental results demonstrate the efficiency of the proposed technique in terms of optimization accuracy and convergence speed compared with other optimization approaches for the tuning of the PID parameters: sw implementation of the BB–BC, genetic algorithm (GA), and particle swarm optimization (PSO).

European Union Between the Big Bang and the Big Crunch

2018 ◽  
pp. 1-19
Author(s):  
Vicenç Fernández Alarcón ◽  
Shahrazad Hadad ◽  
Simona Irina Goia
Keyword(s):  
European Union ◽  
Big Bang ◽  
Big Crunch ◽  
The Big Bang

An exponential big bang-big crunch algorithm for discrete design optimization of steel frames

2012 ◽  
Vol 110-111 ◽  
pp. 167-179 ◽  
Author(s):  
O. Hasançebi ◽  
S. Kazemzadeh Azad
Keyword(s):  
Design Optimization ◽  
Steel Frames ◽  
Big Bang ◽  
Big Crunch

scholarly journals REKONSILIASI KOSMOLOGIS Antara Teorema Penciptaan dan Teori Evolusi

LOGOS ◽  
2020 ◽  
Vol 17 (2) ◽  
pp. 15-45
Author(s):  
Leo Agung Srie Gunawan
Keyword(s):  
Formation Process ◽  
Big Bang ◽  
Main Question ◽  
Theory Of Evolution ◽  
Big Bang Theory ◽  
Scientific Approach ◽  
Big Crunch ◽  
Ex Nihilo ◽  
The Big Bang ◽  
The Universe

The problem of the universe having a great mystery encloses the big question about its origin. To answer the origin of universe, generally, there are two approaches, namely faith and science. The main question has to be replied: “What do the differences and the similarity of them?” The approach of faith bases on the inquiry of “who causes the existence of the universe”. This approach states that the origin of universe was created by God and hence, it was formed by God from a nothingness (creatio ex nihilo). This is known as the theorem of creation. Furthermore, the scientific approach is grounded on the research of “how the universe was formed in the beginning”. This oncoming being explained by the Big Bang Theory, which is continued by the Big Crunch Theory, asserts that the origin of universe came from the prime matter which exploded incredibly in a such a way that the formation process of the universe took place (the singularity). This is well-known as the theory of evolution (the cosmological evolution). In conclusion, the scientific approach explaining the process of creation and the faith one answering the actor of it are complementary.

scholarly journals Probability distribution for the quantum universe

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
Alex Kehagias ◽  
Hervé Partouche ◽  
Nicolaos Toumbas
Keyword(s):  
Probability Distribution ◽  
Probability Density ◽  
Quantum Probability ◽  
Big Bang ◽  
Inner Product ◽  
Expectation Values ◽  
Classical Probability ◽  
Big Crunch ◽  
The Big Bang ◽  
The Universe

Abstract We determine the inner product on the Hilbert space of wavefunctions of the universe by imposing the Hermiticity of the quantum Hamiltonian in the context of the minisuperspace model. The corresponding quantum probability density reproduces successfully the classical probability distribution in the ħ → 0 limit, for closed universes filled with a perfect fluid of index w. When −1/3 < w ≤ 1, the wavefunction is normalizable and the quantum probability density becomes vanishingly small at the big bang/big crunch singularities, at least at the semiclassical level. Quantum expectation values of physical geometrical quantities, which diverge classically at the singularities, are shown to be finite.

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