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流量系数数学模型的建立及计算机过程模拟 被引量:3
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作者 杨绪壮 田福利 《内蒙古石油化工》 CAS 2002年第4期5-6,共2页
利用文献数据[1],建立了孔板流量计孔流系数的数学模型,并对该模型进行了验证。证明该模型与实际情况符合非常好,标准误差σ<0.01。同时,使用Visual Basic语言,用该模型对标定流量计的实验过程进行计算机模拟,计算结果令我们非常满意。
关键词 流量系数 数学模型 建模 化工生产 计算机过程模拟
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乙醛分馏过程的计算机优化控制
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作者 翁国弘 徐云侠 李云飞 《苏州丝绸工学院学报》 1997年第3期27-33,共7页
本文就乙醛分馏过程的计算机优化控制,从模拟、优化及控制三个层次,叙述了建模思想,优化控制策略以及计算机技术在优化过程中的应用。
关键词 乙醛 分馏 计算机过程模拟 优化 控制
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三峡库区水土流失与面源污染试验观测站设施简介 被引量:1
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作者 贺秀斌 《中国水土保持》 北大核心 2010年第10期F0003-F0003,共1页
三峡库区水土流失与面源污染试验观测站试验征地1.07hm^2,划拨使用消落带15km,技术研发与示范协议用地3.2km^2。已建立了自动在线探测、无线数据采集、室内样品实验分析、田间模拟实验和遥感技术结合的立体动态监测平台以及计算机... 三峡库区水土流失与面源污染试验观测站试验征地1.07hm^2,划拨使用消落带15km,技术研发与示范协议用地3.2km^2。已建立了自动在线探测、无线数据采集、室内样品实验分析、田间模拟实验和遥感技术结合的立体动态监测平台以及计算机过程模拟与数据信息管理系统;野外基础观测设施包括24个水土流失、面源污染、 展开更多
关键词 污染试验 水土流失 面源污染 三峡库区 观测设施 观测站 数据信息管理系统 计算机过程模拟
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基于OpenGL标准的地学信息可视化 被引量:2
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作者 李林 《西北地质》 CAS CSCD 2000年第3期56-60,共5页
科学计算可视化技术是计算机应用工程中的研究热点 ,也是当今地质科学现代化的关键技术之一。但基于低层硬件及基础算法而开发地质应用软件 ,常因技术因素或算法复杂度问题而难以在微机平台上实时模拟。本文针对地质过程计算机模拟的实... 科学计算可视化技术是计算机应用工程中的研究热点 ,也是当今地质科学现代化的关键技术之一。但基于低层硬件及基础算法而开发地质应用软件 ,常因技术因素或算法复杂度问题而难以在微机平台上实时模拟。本文针对地质过程计算机模拟的实际特点 ,讨论了在微机平台上基于 Open GL标准实现地质过程可视化的关键步骤、相关问题及研究方向。 展开更多
关键词 地学信息可视化 OPENGL 地质过程计算机模拟
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Local inhomogeneity in totally asymmetric simple exclusion processes with different hopping rates 被引量:1
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作者 肖松 吴淑英 +1 位作者 郑东升 刘明哲 《Journal of Central South University》 SCIE EI CAS 2012年第10期3012-3016,共5页
Local inhomogeneity in totally asymmetric simple exclusion processes (TASEPs) with different hopping rates was studied. Many biological and chemical phenomena can be described by these non-equilibrium processes. A s... Local inhomogeneity in totally asymmetric simple exclusion processes (TASEPs) with different hopping rates was studied. Many biological and chemical phenomena can be described by these non-equilibrium processes. A simple approximate theory and extensive Monte Carlo computer simulations were used to calculate the steady-state phase diagrams and bulk densities. It is found that the phase diagram for local inhomogeneity in TASEP with different hopping rates p is qualitatively similar to homogeneous models. Interestingly, there is a saturation point pair (a*, fl*) for the system, which is decided by parameters p and q. There are three stationary phases in the system, when parameter p is fixed (i.e., p=0.8), with the increase of the parameter q, the region of LD/LD and HD/HD phase increases and the HD/LD is the only phase which the region shrinks. The analytical results are in good agreement with simulations. 展开更多
关键词 asymmetric simple exclusion process INHOMOGENEITY hopping rate Monte Carlo simulation approximate theory computer simulation
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Modeling heat transfer for phase transition during pressure assisted thawing treatment
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作者 CHEN Shu-hua ZHAO Qi-cheng XIA Yuan-jing LIU Ke-gang X-UE Lu-zhou 《Journal of Chemistry and Chemical Engineering》 2009年第6期15-21,共7页
The thawing time of ice and freezed Salomon fish during high pressure assisted thawing process was evaluated by computer simulation using a finite element and the results were compared with those under atmospheric pre... The thawing time of ice and freezed Salomon fish during high pressure assisted thawing process was evaluated by computer simulation using a finite element and the results were compared with those under atmospheric pressure. The apparent specific heat method was adopted to treat the release of latent heat. The effects of different factors on the high pressure assisted thawing process were analyzed. The time reductions of different sample dimensions were estimated and the temperature contour of thawing at different conditions was obtained. The results showed that the temperature gap of phase transition was the main factor, which could shorten the thawing time. Moreover, a second order relationship was obtained between pressure and phase transition time. 展开更多
关键词 pressure assisted thawing phase transition heat transfer computer simulation
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Technological Innovation Collaboration Network Evolution Simulation and Empirical Research
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作者 Yu Wenlong 《International Journal of Technology Management》 2013年第8期138-141,共4页
The technology innovation cooperation relationship of enterprises has evolved into the representation of complicated network. MATLAB software is used for computer simulation on network evolution process of technology ... The technology innovation cooperation relationship of enterprises has evolved into the representation of complicated network. MATLAB software is used for computer simulation on network evolution process of technology innovation cooperation, and Ucinet characterization analysis software is used to compute characteristic values of simulation network such as power law index of network, average route length and accumulation coefficients. It is compared with the actual network, and the simulation results are analyzed to verify the rationality of the constructed evolution model. 展开更多
关键词 technological innovation network evolution SIMULATION
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Reliability emulation of production system on longwall face
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作者 HAO Bing-yuan SUI Gang KANG Li-xun 《Journal of Coal Science & Engineering(China)》 2009年第1期76-80,共5页
Based on the theory of random process and the characteristic of the functioning of a system component subject to a certain specific probability distribution, emulated the whole process of system production on Iongwall... Based on the theory of random process and the characteristic of the functioning of a system component subject to a certain specific probability distribution, emulated the whole process of system production on Iongwall face was emulated, in which the methods of time pace and computer random emulation were adopted. The paper provides an objective basis for the analysis of a mining Iongwall face and the varied lines of effectiveness, machine stoppage rate and coal flow of components and system, and output etc.lt also offers some theories to improve productivity by discussing the application of the transformation plan and optimization of reasonable coal stock capacity, as well as selection of system equipment and matching optimization. 展开更多
关键词 fully-mechanized Iongwall face component reliability random emulations dynamic simulation
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Research on the Influence of X-ray Phase Contrast Imaging Parameters with Micro-focus Source
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作者 WU jie WANG Yan +3 位作者 CHEN Jia-bi CHENG Jing-hai ZHANG Xue-long NIE Sheng-dong 《Chinese Journal of Biomedical Engineering(English Edition)》 2011年第1期29-35,共7页
X-ray in-line phase contrast imaging enables weakly to absorb specimens to be imaged successfully with high resolution and definition. In this paper we use computer simulation method to analyze how each parameter infl... X-ray in-line phase contrast imaging enables weakly to absorb specimens to be imaged successfully with high resolution and definition. In this paper we use computer simulation method to analyze how each parameter influences the quality of the image. It can avoid wasting unnecessary time and materials in the course of experiment to get ideal images. 展开更多
关键词 X-ray phase contrast micro-focus source SIMULATION
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Refurbishment of Significant Timber Structures in Slovakia
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作者 Jaroslav Sandanus Kristian Sogel 《Journal of Civil Engineering and Architecture》 2014年第8期1009-1016,共8页
The paper presents an analysis and a subsequent refurbishment of significant buildings in Slovakia. The analysis focuses on the load-bearing timber roof-structures. There are three sacral objects and one long-span spo... The paper presents an analysis and a subsequent refurbishment of significant buildings in Slovakia. The analysis focuses on the load-bearing timber roof-structures. There are three sacral objects and one long-span sporting hall presented. The paper tries to introduce the background of difficult refurbishment process. Before the refurbishment, a thorough process of investigation is required This process includes four basic steps. General information about the load-bearing structure is obtained from the geodetic survey that foregoes the process of diagnostic inspection. The diagnostic survey focuses on the defects of the structure, their degree and possible origin. Modem methods of computer modelling help to understand the structural operation and help to find reserves of carrying capacity. Structural analysis should take into account all detected defects and the joint types, which can influence the transfer of forces. The refurbishment project is usually a brief, but clear summary for fulfilling the needs of Monument Board and building process. All the steps require knowledge from different fields and require professional approach. 展开更多
关键词 Timber DIAGNOSIS REFURBISHMENT sacral architecture
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Stationary and Non-stationary Self-Induced Vibrations in Waveguiding Systems
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作者 Valery Gulyayev Olga Glushakova Sergey Glazunov 《Journal of Mechanics Engineering and Automation》 2014年第3期213-224,共12页
With the use of a wave model, the non-linear problem about realization of the Poincare-Hopf bifurcations in waveguiding systems is stated. The constitutive non-linear differential equations are deduced, the methods fo... With the use of a wave model, the non-linear problem about realization of the Poincare-Hopf bifurcations in waveguiding systems is stated. The constitutive non-linear differential equations are deduced, the methods for their solution are elaborated. The example of torsion wave propagation in an elongated drill string is considered. Computer simulation of auto-oscillation generation in the examined system is performed for the cases of stationary and non-stationary variations of the perturbation parameter. The diapason of the drilling rotation velocity values corresponding to regimes of stable self-excited periodic motions of the system is found. This domain is shown to be limited by the states of the Poincare-Hopf bifurcations. Owing to the feature that the stated problem is singularly perturbed, the autovibrations are of relaxation type with fast and slow motions. Influence of the length of the uniform and articulated drill strings on the bifurcation values of their angular velocities of generation and accomplishment of the auto-oscillation processes in the drill strings is discussed. 展开更多
关键词 Waveguiding systems singularly perturbed problem self-induced vibrations Hopf's bifurcation relaxation vibrations.
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64-qubit quantum circuit simulation 被引量:7
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作者 Zhao-Yun Chen Qi Zhou +3 位作者 Cheng Xue Xia Yang Guang-Can Guo Guo-Ping Guo 《Science Bulletin》 SCIE EI CSCD 2018年第15期964-971,共8页
Classical simulations of quantum circuits are limited in both space and time when the qubit count is above 50, the realm where quantum supremacy reigns. However, recently, for the low depth circuit with more than 50 q... Classical simulations of quantum circuits are limited in both space and time when the qubit count is above 50, the realm where quantum supremacy reigns. However, recently, for the low depth circuit with more than 50 qubits, there are several methods of simulation proposed by teams at Google and IBM. Here,we present a scheme of simulation which can extract a large amount of measurement outcomes within a short time, achieving a 64-qubit simulation of a universal random circuit of depth 22 using a 128-node cluster, and 56-and 42-qubit circuits on a single PC. We also estimate that a 72-qubit circuit of depth 23 can be simulated in about 16 h on a supercomputer identical to that used by the IBM team. Moreover, the simulation processes are exceedingly separable, hence parallelizable, involving just a few inter-process communications. Our work enables simulating more qubits with less hardware burden and provides a new perspective for classical simulations. 展开更多
关键词 Simulation of quantum circuits Universal random circuit Quantum supremacy Partitioning Parallel computing
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Equations of state for aqueous solutions under mantle conditions 被引量:5
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作者 ZHANG ZhiGang ZHANG Chi GENG Ming 《Science China Earth Sciences》 SCIE EI CAS CSCD 2016年第6期1095-1106,共12页
With unique physical and chemical properties, aqueous solutions in the mantle may play important roles for a number of geochemical and geodynamical processes. However, since experimental data available are very limite... With unique physical and chemical properties, aqueous solutions in the mantle may play important roles for a number of geochemical and geodynamical processes. However, since experimental data available are very limited, people still know little about the aqueous solutions and their interactions with surrounding rocks and melts. From the perspective of thermodynamics, equation of state(EOS) is the key to push forward the modeling of aqueous solutions. Nevertheless, up to now accurate EOSs suitable for the mantle conditions are still in shortage. With discussions over several recognized EOSs, we summarize several ways to enhance the predictability of EOS: utilizing high quality data from molecular simulations, choosing functions with sound physical background, and improving the regression procedures for the empirical parameters. In the meantime, we find that the ion-bearing systems are still the focus of challenges in this area. New developments of experiments and computer simulations effectively deal with these challenges and in-depth understandings of aqueous solutions in the mantle are expected in the near future. 展开更多
关键词 Aqueous solutions MANTLE Equation of state Molecular dynamics First principles Fluid-rock interactions
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