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An iterative optimization strategy for fed-batch fermentation process is presented by combining a run-to-run optimization with swarm energy conservation particle swarm optimization (SEC-PSO). SEC-PSO, which is designed with the concept of energy conservation, can solve the problem of premature convergence frequently appeared in standard PSO algorithm by partitioning its population into several sub-swarms according to the energy of the swarm and is used in the optimization strategy for parameter iden-tification and operation condition optimization. The run-to-run optimization exploits the repetitive nature of fed-batch processes in order to deal with the optimal problems of fed-batch fermentation process with inaccurate process model and unsteady process state. The kinetic model parameters, used in the operation condition optimization of the next run, are adjusted by calculating time-series data obtained from real fed-batch process in the run-to-run optimization. The simulation results show that the strategy can adjust its kinetic model dynamically and overcome the instability of fed-batch process effectively. Run-to-run strategy with SEC-PSO provides an effective method for optimization of fed-batch fermentation process. 相似文献
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利用信息技术进行文献数字化保护是保存与利用民族文献遗产的重要手段。本文以虚拟现实技术为基础,结合图书馆的古籍文献特点及应用情况,构建古籍文献三维数字模型库系统,并对该系统的优势,及实现该系统所涉及的关键技术作以探讨。该方法为古籍文献保存和利用提供了新的思路。 相似文献
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基于工作流和XML的生产报表系统设计与实现 总被引:2,自引:1,他引:1
传统化工生产企业无法实时获取远程生产数据报表,而现有报表工具存在数据和格式之间耦合度高、难以修改维 护,不能重用等缺点,为了克服这些缺点,以实际的科研项目为背景,将生产现场的各种数据通过信息网络系统进行集成, 在对企业报表工作流程与企业生产报表的特点进行全面分析的基础上设计并开发完成了基于工作流和XML技术的生产数据报表系统.实践结果表明,该系统具有良好的稳定性、安全性,高效性、易扩展性. 相似文献
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粒子群优化算法(PSO)是一种新兴的随机优化技术,在许多领域得到了广泛应用。为了提高算法的计算精度,加快算法的收敛速度,本文提出了一种群能量恒定的粒子群优化算法(SEC-PSO)。算法根据粒子内能进行动态分群,并且引入粒子最差位置,通过最优个体和最差个体获取信息。将SEC-PSO用于几种典型函数的优化问题,仿真结果表明,SEC-PSO具有更强的全局搜索能力,优化性能明显提高。 相似文献
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