Limonoid glucosides in Orange Molasses

The concentrations of limonoid glucosides in orange molasses, a byproduct of citrus juice processing, were measured. The 17-β-D-gluco-pyranoside derivatives (glucosides) of limonin, nomilin, nomilinic acid and obacunone were present and quantified. Orange molasses contained an average of 568 ppm of total limonoid glucosides at 11.8°Brix. Orange molasses (3.8L) contained up to 12.5g of total limonoid glucosides. The molasses could be used as a source for commercial isolation of citrus limonoid glucosides.     

一种应用于柔性作业车间成组调度问题的分级优化算法

提出一种求解柔性作业车间成组调度FGJSS(flexible grouped job-shop scheduling)问题的蚁群粒子群求解算法。算法采用主从递阶形式,主级为蚁群优化算法,选择零件加工设备;从级为粒子群优化算法,在主级零件加工设备约束下优化设备作业排序以实现流通时间最小的目标。算法中,以工序加工时间和设备承载的作业族数为启发式信息设计蚂蚁在工序可用设备间转移概率;以粒子向量优先权值和作业族号为依据设计解码方法实现设备上的成组作业排序。最后,通过仿真实验,验证了该算法的有效性。     

作业车间环境下的采购-生产-配送联合调度模型

针对生产-配送联合调度（IPDS）模型较少考虑复杂生产环境以及采购环节的问题,建立了在作业车间环境下,以最小化订单完成时间为目标的采购-生产-配送联合调度（IPPDS）模型,并采用改进的动态人工蜂群（DABC）算法进行求解。根据IPPDS问题的特征,首先,采用二维实数矩阵的编码方式,实现任务（加工与运输）与资源（设备与车辆）的匹配关系;其次,采用基于工艺过程的解码方式,并在解码过程中针对不同任务设计了满足约束条件的方法,来保证解码方案的可行性;最后,在算法过程中设计了引领蜂与跟随蜂的动态协调机制和局部启发式信息。通过实验给出DABC适当的参数区间,对比实验结果表明,IPPDS策略相较于分段调度和IPDS策略,调度时间分别缩短了35.59%和30.95%;DABC相较于人工蜂群（ABC）算法求解效果平均提升了2.54%,相对于改进的遗传算法（AGA）求解效果平均提升了6.99%。因此,IPPDS策略能更快速地满足客户需求,而DABC算法既减少需设置的参数,又具有良好的探索和开发能力。     

以虚拟机器人手臂开展之方法对障碍空间施予两段式逐步型之群集化(英文)

A region filled with stationary and non-stationary obstacles always needs a path,based on clustering all the obstacles,for moving of autonomous robots.This paper provides a method,called"two-phase stepwise clustering" to solve this problem.Phase I uses Dendrogram as an approach for the preliminary clustering in the beginning to avoid misleading of the path start.Phase II links piecewise segments from centers of triangles deployed by neural discrimination.In the simulation,two paths constructed from longitudinal deployment and lateral deployment links each other and thus forms a robot path and also an envelope as clustering obstacles.     

On the stability and convergence of self-tuning control–virtual equivalent system approach

This article presents a unified understanding and judgement of the stability and convergence of a general self-tuning control (STC) system, which consists of arbitrary control strategy, arbitrary parameter estimation algorithm and a deterministic/stochastic linear time-invariant (LTI) plant. The necessary conditions required for the global stability and convergence of a general STC system are relaxed, i.e. the convergence of parameter estimates is removed for both deterministic and stochastic STC schemes. To reach this goal, ‘virtual equivalent system (VES)’ concept and methodology is adopted. With the help of VES, the original nonlinear dominant (nonlinear in structure) problem is converted to a linear dominant (linear in structure) problem. The results developed in this article show that STC systems are stable and convergent for the abundance of control strategies and parameter estimation algorithms, which will provide great flexibility in the applications of STC.     

火电建设项目法管理的几点体会

要做好项目管理工作必须建立工作制度 ,设立监督机构 ;强化技术管理 ;创新用人机制 ;提高项目经理自身的素养。这样才能使管理工作逐步向可控、在控的方向发展。     

加氢裂化尾油生产高质量润滑油基础油

加工试验表明,加氢裂化尾油经过糠醛精制、酮苯脱蜡以及白土精制可以生产出符合HVIH标准(高粘度指数基础油)的润滑油基础油。该基础油具有良好的低温流动性能,硫、氮含量较低,饱和烃含量较高,可以调合中、高档润滑油,但也存在紫外吸收不稳定的问题。从加工情况来看,糠醛装置废液系统负荷偏小,糠醛精制油收率提高了4%;酮苯装置的加工负荷降低100 t/d,能耗上升600 MJ/t;对白土装置的影响较小。     

四叙永煤矸石精选提纯试验研究

本文介绍了四川叙永煤矸石精选提纯工艺技术流程及试验结果。对于综合开发利用川南丰富的煤系粘土资源，具有重要意义     

Dy含量对(Nd,Dy)2(Fe,Co,Nb,Ga)14B/α-Fe纳米复合材料微结构和磁性能的影响

用熔体快淬 晶化处理的方法制备了不同Dy含量的Nd8-xDyxFe83 5Co2 Nb1Ga1B4 5(x =0 ,0 2 ,0 5 ,0 8,1 0 )纳米复合材料 ,用差动 (扫描 )分析 (DSC)、X 射线衍射 (XRD)、透射电镜 (TEM )等研究了样品的晶化过程及微结构 ,用振动样品磁强计 (VSM)测量了磁性能。实验结果表明 :硬磁性相的晶化温度随Dy含量的增加逐渐升高 ,在最佳热处理条件下 ,矫顽力随Dy含量的增加首先有较大的提高 ,在Dy含量x >0 8以后增加较缓慢。剩磁随Dy含量的增加逐渐下降 ,在Dy含量x >0 8以后下降更加显著 ,磁能积在x =0 5～ 0 8附近出现峰值。剩磁和矫顽力与Dy含量的非线性关系是由于软、硬磁性晶粒之间交换耦合作用的强弱导致的。     

孔板在石化工业应用中的常见问题

介绍孔板在石化设计、施工中有关选型、计算、安装、取压的常用模式，结合国内外工程实际使用经验．讨论一些常见的错误观点并提出相应解决办法。