不敏变换鲁棒Kalman滤波器在发酵过程中的应用(英文)

State estimation is the precondition and foundation of a bioprocess monitoring and optimal control. However, there are many difficulties in dealing with a non-linear system, such as the instability of process, un-modeled dynamics, parameter sensitivity, etc. This paper discusses the principles and characteristics of three different approaches, extended Kalman filters, strong tracking filters and unscented transformation based Kalman filters. By introducing the unscented transformation method and a sub-optimal fading factor to correct the prediction error covariance, an improved Kalman filter, unscented transformation based robust Kalman filter, is proposed. The performance of the algorithm is compared with the strong tracking filter and unscented transformation based Kalman filter and illustrated in a typical case study for glutathione fermentation process. The results show that the proposed algorithm presents better accuracy and stability on the state estimation in numerical calculations.     

应用群能量恒定粒子群优化算法的批次流加发酵过程批次间优化(英文)

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.     

浅议建设工程的结算审核

本文主要简述了工程预结算审核中应该注意的问题,及常规性审核的主要内容,笔者根据自己实际工作介绍了常用的工程预结算的审核方法以及各种方法适用的审核对象。     

基于CCPM的矿井建设计划的制定

目前,矿井建设多采用网络计划技术制定,但该传统技术存在估算工期过长、计划缺乏柔性等缺陷,本文引入关键链项目管理（CCPM）方法,通过设置项目缓冲区和输送缓冲区控制建设进度,有效降低了不确定因素对计划的影响,增强了计划的柔性,且保证了确定环境下编制的矿井建设计划,在不确定环境下的顺利执行。     

用于专家系统规则库的冗余校验方法研究

产生式规则是目前应用较多的一种知识表示方法。在用于确定发酵过程生物量软测量混合模型结构的专家系统中,当向产生式规则知识库添加新的规则时,冗余的存在会影响推理的效率以及推理的准确性。提出了一种用于该专家系统规则库的冗余校验方法,给出了冗余规则的判别、冗余规则的处理以及冗余校验的实现方法。实验结果表明,该冗余校验方法可以根据输入条件和已有规则,判断出新添加的规则是否冗余,并在消除冗余对推理效率影响的同时,降低模型复杂度,有利于优化混合模型的结构。     

用于超微定位机构的被动隔振系统的研究

介绍了用于超微定位机构的被动隔振系统的研究，给出了超微定位机构和被动隔振系统的数学模型，并设计了被动隔振系统。该被动隔振系统对外介的低频振动干扰振效果良好。     

水平井固井技术在海上的应用

【】水平井钻井技术日益成为当今石油勘探开发的重大技术,水平井可以开采一些薄油层、低压低渗油藏,并能穿过多个油气层。本文针对埕岛油田水平井钻井以及保护油气层的需要,优选了零自由水、低失水、高分散、短过渡、无缓凝、直角稠化固井水泥浆体系,选用了与该体系以及海水钻井液体系相容性好的冲洗隔离液,应用了性能优良的固井工具及附件,该固井技术已经在海上30余口水平井的固井施工中取得了良好的效果。     

冷热电三联供系统在改造工程中的应用分析

冷热电三联供是分布式能源的一种,这种供能系统具有节约能源、改善环境、增加电力供应等综合效益,对减少大气污染和提高能源系统效率都具有积极作用。本文以实际改造工程为例,对冷热电联供系统的核心技术、改造方案及改造后的能耗进行了分析,探讨实施联合供能的优势及意义。     

用单片机开发显影机控制系统

介绍了CYGNAL公司生产的C8051 F020单片机在显影机控制中的应用,并且介绍一种类似PLC扫描工作方式的编程方法,以及在设计线路板时应采取的抗干扰措施.     

一致性理论优化无人机集群编队控制

针对非线性、强耦合特性的无人机集群系统在达到期望稳态队形时速度缓慢而影响作战效率的编队控制问题,提出多智能体一致性理论优化的无人机分布式编队控制算法。算法首先基于一致性理论建立了无人机集群的二阶离散模型,并设计了模型的分布式控制协议,解决了具有非线性特性无人机集群的分布式编队问题;然后通过理论分析和推导,得到了实现期望集群编队的约束条件,最后采用经典二阶积分模型对算法模型和控制协议进行仿真,验证了模型的有效性。