分散网络化制造模式下协调调度的遗传算法

讨论了在生产实际问题中利用遗传算法实现具有各制造单元间协调功能的生产计划与调度系统，为了把遗传算法应用到生产实际的协调调度的环境中，提出了自己的编码方式，在此基础上实现了针对调度问题的遗传算法，并通过Agent实现异地调度系统之间的协调通信，这一工系统适合于分布式、自治的场合，满足分散网络化控制中各个分布式单元具有智能与自主的控制特征要求。     

气相法全密度聚乙烯高效催化剂研究──加压搅拌床乙烯气相聚合及应用

建立搅拌床加压装置，研究了两种新型高活性催化剂催化乙烯气相聚合；研究了聚合工艺条件对催化剂性能的影响；研究了催化剂的催化效率、聚合产物的颗粒形态、加压聚合反应动力学，表明新型催化剂对乙烯气相聚合具有优良的综合性能，采用搅拌床装置及有关工艺可有效地评价乙烯气相聚合反应．     

梭状芽孢杆菌L—Ⅱ对有机酸和醇类代谢的研究

本文对梭状芽孢杆菌L一Ⅱ代谢利用有机酸和醇类进行了研究。研究结果表明,梭状芽孢杆L一Ⅱ能很好地利用乙酸、丙酸、丁酸以及乙醇和丙醇。当以乙醇和乙酸为底物时,其主要产物为了酸和己酸;当以乙醇和丙酸为底物时,其主要产物为戊酸、庚酸;当以丙醇和乙酸为底物时,其主要产物为丙酸、戊酸、丁酸以及己酸。     

分散第二相SiO_2材料对Na_2Mo(0.1) S_(0.9)O_4离子导电性的影响

本文对分散第二相SiO_2材料掺入A_2BX_4型Na~+离子导体(Na_2Mo_(0.1)S(0.9)O_4的离子导电性进行了研究,结果表明,SiO-2含量为4m/o时电导率出现极大(σ=2.14×10~(-4)Ω~(-1)cm~(-1),在315℃时),同时给出了绝缘第二相材料能够提高母体电导率的原因。     

目标类型识别的改进灰关联模型

针对防空作战目标类型识别的具体需求,分析了传统和广义灰关联模型在处理数据时存在的不足之处,建立了基于熵权法的改进灰关联目标类型识别模型。首先,为了提高空情数据的利用率,运用熵权法对数据熵值进行描述而后客观地赋予权重;其次,用置信度取代数据的绝对差值,更加准确地描述数据间相对差异的偏差情况;最后,对模型输出结果进行离散化处理,增强了模型的区分能力。用实例对模型进行检验,结果表明:该模型准确、简单且识别率高。     

Currency forecasting based on an error components‐seemingly unrelated nonlinear regression model

This paper proposes to forecast foreign exchange rates by means of an error components‐seemingly unrelated nonlinear regression (EC‐SUNR) model and, simultaneously, explore the interrelationships among currencies from newly industrializing economies with those of highly industrialized countries. Based on the empirical results, we find that the EC‐SUNR model improves on the performance of forecasting foreign exchange rates in comparison with an intrinsically nonlinear dynamic speed of adjustment model that has been shown to outperform several other important models in the forecasting literature. We also find evidence showing that the foreign exchange markets of the newly industrializing countries are influenced by those of the highly industrialized countries and vice versa, and that such interrelationships affect the accuracy of currency forecasting. Copyright © 2005 John Wiley & Sons, Ltd.     

指数时程差分Runge-Kutta法在非线性高振荡及迟滞系统中的应用

为满足非线性高振荡及迟滞动力系统的高精度数值计算,提出了指数时程差分RungeKutta法;将传统的差分改为积分,构造出了二阶和三阶指数时程差分RungeKutta算法;将指数时程差分法应用于二阶高振荡动力系统、参数激励与强迫激励联合作用下的非线性振动系统以及迟滞非线性系统中,并与传统的RungeKutta法进行了比较;讨论了计算精度和效率.数值计算结果表明,对于非线性动力学系统,二阶指数时程差分RungeKutta法在计算效率和精度上要优于四阶传统RungeKutta法;该方法适合用于非线性动力学系统分析和数值计算的方法,获得的数值解能够揭示系统的本质特性.     

大叶饲料槐高频再生体系建立及试管苗工厂化生产

通过叶片外植体愈伤组织诱导和直接不定芽再生途径，建立了大叶饲料槐的高频再生系统，采用正交试验筛选出愈伤组织最适诱导培养基为；MS附加0．5mg／L 6-BA和1．0mg／L NAA；愈伤组织分化最适培养基为：MS附加2．0mg／L 6-BA和0．2mg／L NAA。叶片外植体直接分化最适培养基为：MS附加2．0mg／L 6-BA和0．1mg／L NAA；试管苗在1／2MS附加0．2mg／L IBA、0．1mg／L NAA和2g／L AC的培养基上生根率高达100％，移栽成活率达90％，从而实现了大叶饲料槐的工厂化生产．     

The v-v energy transfer of highly vibrationally excitedstates (Ⅱ)──Vibrational quenching of CO(v) by H_2O

The vibrational energy transfer from highly vibrationally excited CO to H 2O molecules is studied by time-resolved Fourier transform infrared emission spectroscopy (TR FTIR). Following the 193 nm laser photolysis of CHBr 3 and O 2 the secondary reactions generate CO(v). The infrared emission of CO(v→v-1) is detected by TR FTIR. The excitation of H 2O molecules is not observed. By the method of the spectral simulation and the differential technique, 8 rate constants for CO(v)/H 2O system are obtained: (1.7±0.1), (3.4±0.2), (6.2±0.4), (8.0±1.0), (9.0±2.0), (12±3), (16±4) and (18±7) (10 -13cm 3·molecule -1·s -1). At least two reasons lead to the efficient energy transfer. One is the contributions of the rotational energy to the vibational energy defect and the other is the result of the complex collision. With the SSH and ab initio calculations, the quenching mechanism of CO(v) by H 2O is suggested.     

层次扩展联结三角网构网法

对常用的自动联结三角网的算法进行分析,找出了影响构网速度的因素,针对这些因素进行研究,提出了新的构网方法──层次扩展联结三角网构网法。