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Integration of assay and cross-hole tomographic data in orebody modelling: joint geostatistical simulation and application at Mount Isa mine, Queensland

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TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY SECTION B-APPLIED EARTH SCIENCE 2001年第1期110卷 B33-B39页

作者： Dimitrakopoulos, R Kaklis, K Univ Queensland WH Bryan Min Geol Res Ctr Brisbane Qld 4072 Australia Tech Univ Crete Dept Mineral Resources Engn Khania Greece

An extended conditional indicator simulation method is described that can be used to integrate cross-hole tomographic data with traditional diamond drill-hole assay data. The non-parametric, stochastic simulation algorithm allows modelling based on the 'hard' assay data. while 'soft' tomographic data are used where appropriate, having regard to their quality or accuracy and compatibility with the assay data. The technique is demonstrated through an application at Mount Isa copper mine, Queensland, Australia, where it was used to integrate cross-hole conductivity data obtained by the radio imaging method into orebody modelling on the basis of Cu assay data. Modelling based on the direct integration of diverse data is a promising and powerful tool for advanced orebody modelling.

关键词： .conductivity indicator integrate Mount Isa Orebody cross-hole Conditional assay data drill-hole tomographic data joint geostatistical simulation Geology Research simulation algorithm Cu assay

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Tight bounds on the simulation of meshes with dynamically reconfigurable row/column buses by meshes with statically partitioned buses

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JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING 2006年第10期66卷 1338-1346页

作者： Matsumae, Susumu Tottori Univ Environm Studies Dept Informat Syst Tottori 6891111 Japan

This paper studies the simulation problem of meshes with separable buses (MSB) by meshes with multiple partitioned buses (MMPB). The M S B and the M M P B are the mesh-connected computers with row/column broadcasting buses. The broadcasting buses of the M S B can be dynamically sectioned into smaller bus segments by program control, while those of the MMPB are statically partitioned in advance. In the M S B, each row/column has only one separable bus, while in the M M P B, each row/column has L partitioned buses (L >= 1, L is a fixed constant). Two results are shown: (1) the n x n MMPB can simulate any step of the n x n MSB time-optimally in O(n(1/(2L+1))) steps, and (2) the m x in MMPB with L = 1 can simulate any step of the n x n MSB in O(n(2)/m(2) + n(1/3)) steps (m <= n). The latter implies that the MMPB with L = 1 can solve the scaling-simulation problem of the MSB time-optimally when m = O(n(5/6)) holds. (C) 2006 Elsevier Inc. All rights reserved.

关键词： mesh-connected computer broadcasting bus reconfigurable bus simulation algorithm optimal algorithm

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COMPUTER-simulation OF SMOOTHING DURING COMPUTER-CONTROLLED OPTICAL POLISHING

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APPLIED OPTICS 1995年第7期34卷 1162-1169页

作者： JONES, RA []The author is with Litton Itek Optical Systems 10 Maguire Road Lexington Massachusetts 02173.

Itek has developed computer-controlled optical surfacing (CCOS) for the fabrication of aspheric optical surfaces. The smoothing process plays a key role in all CCOS operations. A computer simulation algorithm was created to provide information on the CCOS smoothing process. The reliability of the algorithm was confirmed with several verification cases. The effect of pertinent tool, lap, and error parameters on smoothing was determined from a series of simulations. In addition, the smoothing algorithm was applied to an operational case to provide real-world credibility. The smoothing simulation algorithm appears to be accurate and useful. The parametric study results are available and the algorithm can be applied to specific cases for guidance in proper CCOS parameter selection.

关键词： COMPUTER MODELING simulation algorithm SURFACE SMOOTHING OPTICAL FABRICATION AUTOMATED FABRICATION

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Adaptive configuration fields: a new multiscale simulation technique for reptation-based models with a stochastic strain measure and local variations of life span distribution

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JOURNAL OF NON-NEWTONIAN FLUID MECHANICS 2002年第1-3期108卷 99-122页

作者： Gigras, PG Khomami, B Washington Univ Dept Chem Engn Mat Res Lab St Louis MO 63130 USA

In this work a new multiscale simulation technique, i.e. Adaptive configuration fields method (ACFM), has been proposed for complex flow simulation of state-of-the-art reptation-based models for entangled polymeric systems. Specifically, this technique combines the essential aspects of the previously introduced Brownian configuration fields and the deformation fields methods [J. Non-Newtonian Fluid Mech. 70 (1997) 79;J. Non-Newtonian Fluid Mech. 89 (2000) 209] to allow simulation of advanced reptation models with a stochastic strain measure and local variations of life span distribution. In order to examine the fidelity and robustness of our new simulation technique, we have performed simulations in a number of different fixed kinematics flows using the single segment reptation model of Ottinger [J. Rheol. 44 (2000) 1293], which possesses the essential features required for quantitatively describing the non-linear rheology of polymer melts, but cannot be implemented in a complex flow using the available state-of-the-art Eulerian multiscale simulation techniques, namely, the Brownian configuration fields or the deformation fields. In turn, the simulation results in unidirectional flows are compared with pure Brownian dynamics simulations and it is shown that the results are in excellent agreement, thus verifying the accuracy of the adaptive configuration fields method. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： reptation configuration fields deformation fields entangled polymeric systems simulation algorithm

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Parallel electromagnetic transient simulation of power systems with a high proportion of renewable energy based on latency insertion method

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IET RENEWABLE POWER GENERATION 2023年第1期17卷 110-123页

作者： Wang, Qiguo Xu, Jin Wang, Keyou Wu, Pan Chen, Weiran Li, Zirun Shanghai Jiao Tong Univ Key Lab Control Power Transmiss & Convers Minist Educ Shanghai Peoples R China

With the interconnection of regional grids and the increasing penetration of renewable energy, the order of the power system model is getting higher and higher, which brings great challenges to the accuracy and real-time performance of electromagnetic transient (EMT) simulation. The simulation of power systems with a high proportion of renewable energy requires a sharp increase in the performance of the hardware platform and the parallelism of the simulation algorithm. To solve this problem, the paper proposes a fine-grained parallel modelling method for power systems with a high proportion of renewable energy, which is inspired by the latency insertion method used in the design of large-scale integrated circuits. And this method is implemented on GPU to achieve the component-level and device-level parallelized simulation of power systems with a high proportion of renewable energy. Finally, the correctness of the proposed algorithm and the CPU-GPU cooperative architecture is verified based on an improved 118-bus case. The cascade system of the improved 9-bus case is used as an example to verify the superiority of the proposed algorithm in terms of simulation efficiency.

关键词： Optimisation techniques Power system management, operation and economics parallel processing renewable energy fine-grained parallel modelling method device-level parallelized simulation simulation efficiency parallel electromagnetic transient simulation simulation algorithm Microprocessors and microcomputers cascade system power system simulation Power system control Microprocessor chips power system model power grids latency insertion method Power engineering computing Parallel software power systems graphics processing units EMTP

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Computer simulation for Gradual Yellowing of Aged Lens and Its Application for Test Devices

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JOURNAL OF THE OPTICAL SOCIETY OF KOREA 2013年第4期17卷 344-349页

作者： Kim, Bog G. Han, Jeong-won Park, Soo-been Pusan Natl Univ Dept Phys Pusan 609735 South Korea Pusan Natl Univ Dept Housing & Interior Design Pusan 609735 South Korea

This paper proposes a simulation algorithm to assess the gradual yellowing vision of the elderly, which refers to the predominance of yellowness in their vision due to aging of the ocular optic media. This algorithm employed the spectral transmittance property of a yellow filter to represent the color appearance perceived by elderly people with yellow vision, and modeled the changes in the color space through a spectrum change in light using the yellow filter effect. The spectral reflectivity data of 1269 Munsell matte color chips were used as reference data. Under the standard conditions of a D65 illuminant and a 10 observer of 1964 CIE, the spectrum of the 1269 Munsell colors were processed through the yellow filter effect to simulate yellow vision. Various degrees of yellow vision were modeled according to the transmittance percentage of the yellow filter. The color differences before and after the yellow filter effect were calculated using the DE2000 formula, and the color pairs were selected based on the color difference function. These color pairs are distinguishable through normal vision, but the color difference diminishes as the degree of yellow vision increases. Assuming 80% of yellow vision effect, 17 color pairs out of (1269x1268)/2 pairs were selected, and for the 90% of yellow vision effect, only 3 color pairs were selected. The result of this study can be utilized for the diagnosis system of gradual yellow vision, making various types of test charts with selected color pairs.

关键词： simulation algorithm Gradual yellowing The elderly CIE xyY DE2000

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A stability criterion for accurate simulation of electrochemical diffusion-kinetic phenomena at the rotating disk electrode and implications for simulation of diffusion-migration and other problems

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JOURNAL OF ELECTROANALYTICAL CHEMISTRY 1996年第1-2期413卷 25-36页

作者： Feldberg, SW Goldstein, CI Rudolph, M UNIV JENA DEPT INORGAN CHEM D-6900 JENA GERMANY

A stable, accurate, and efficient fully implicit finite difference algorithm is developed for the simulation of electrochemical behavior at a rotating disk electrode (RDE). Convenient expressions are developed for accurate evaluations of the hydrodynamic velocity profile of the solution normal to the disk, of the thickness of the diffusion layer, and of the minimum thickness of solution which must be considered in a simulation. The simulation algorithm uses an exponentially expanding space grid to effect efficient and accurate simulation of systems involving homogeneous chemical reactions with reaction layers that may be much smaller than the RDE diffusion layer. Stability analysis of the RDE simulation in the absence of homogeneous kinetics produces a simple criterion which precisely delimits the values of the parameters which characterize the exponentially expanding space grid (i.e. the density of the volume elements and the rate of expansion) required for stable and accurate simulations. The RDE simulation algorithm was incorporated into a generalized cyclic voltammetric simulator which allowed us to simulate RDE responses for complex systems involving various combinations of heterogeneous and homogeneous (first- and or second-order) reactions: the same stability criterion sufficed. Implications of the analysis for finite difference simulations of diffusion-migration problems are also discussed.

关键词： rotating disk electrode simulation algorithm diffusion-kinetics diffusion-migration

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Constructing simulation relations for IDO systems affine in inputs and disturbances

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MATHEMATICS OF CONTROL SIGNALS AND SYSTEMS 2015年第3期27卷 317-346页

作者： Munteanu, Laura Grasse, Kevin A. SUNY Coll Oneonta Oneonta NY 13820 USA Univ Oklahoma Norman OK 73019 USA

We introduce a new algorithm for generating simulation relations between nonlinear control systems that are affine in inputs and disturbances and provide precise mathematical conditions ensuring that the algorithm works as intended. In addition, we prove that under appropriate conditions, making the "right choices" in the algorithm leads to a maximal simulation relation. Finally, we construct several illustrative examples showing in detail how the algorithm works in specific instances and also indicate some of the limitations of the algorithm.

关键词： simulation algorithm Maximal simulation relation

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SAFE SEQUENCING OF CONCURRENT EVENTS IN BEHAVIORAL simulation

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IEE PROCEEDINGS-G CIRCUITS DEVICES AND SYSTEMS 1990年第6期137卷 451-458页

作者： CURATELLI, F BISIO, GM DIZITTI, E DIBE Università di Genova Via Opera Pia 11A Genova 16145 Italy

A functional/behavioural simulator is described, in which the system to be simulated is modelled by defining its hierarchy and by specifying the descriptive function of the behaviour of its components. The functional model, based on the definition ofstrictandnonstrict functions, makes it possible to introduce and formally justify a simulation mechanism for safe sequencing of concurrent events in the presence of zero-delay components. Static and dynamic component instances are allowed, and the system can be simulated at different hierarchical levels, specified by the user for each component. The simulation algorithm is based on an event-driven mechanism and has been implemented in the language C.

关键词： algorithms dynamic component hierarchical levels static components circuit analysis computing event-driven mechanism behavioural simulation circuit CAD strict functions concurrent events zero-delay components safe sequencing simulations hierarchical systems simulation algorithm simulation mechanism language C functional model functional/behavioural simulator nonstrict functions Functional modelling

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simulation of meshes with separable buses by meshes with multiple partitioned buses

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INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE 2004年第3期15卷 475-484页

作者： Matsumae, S Tottori Univ Environm Studies Dept Informat Syst Tottori 6891111 Japan

This paper studies the simulation problem of meshes with separable buses (MSB) by meshes with multiple partitioned buses (MMPB). The MSB and the MMPB are the mesh connected computers enhanced by the addition of broadcasting buses along every row and column. The broadcasting buses of the MSB, called separable buses, can be dynamically sectioned into smaller bus segments by program control, while those of the MMPB, called partitioned buses, axe statically partitioned in advance. In the MSB model, each row/column has only one separable bus, while in the MMPB model, each row/column has L partitioned buses (Lgreater than or equal to2). We consider the simulation and the scaling-simulation of the MSB by the MMPB, and show that the MSB of size n x n can be simulated in O(n(1/(2L))) steps by the MMPB of size n x n, and that the MSB of size n x n can be simulated in O(n/m (n/m + m(1/(2L)))) steps by the MMPB of size m x m. (m

关键词： simulation algorithm separable bus partitioned bus mesh connected computer reconfigurable mesh

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