不完全信息下产品升级组合定价研究

对二级供应链中组合升级产品定价问题进行研究.以博弈论为工具,建立了不完全信息下组合产品与独立产品定价的数学模型,获得了两种模型的最优解.用计算机仿真方法对完全信息和不完全信息下产品的定价策略和利润进行了分析,同时对独立产品和组合产品定价和利润进行比较.     

DNA序列拼接中重复序列屏蔽的一种新方法

针对序列拼接中的重复序列问题,提出了一种基于快速沃尔什变换的重复序列屏蔽方法．根据快速沃尔什变换的特点,快速给出重复序列所在的可能位置信息,从而快速识别重复序列且加以屏蔽．该方法不仅识别重复序列的错误率低而且大大降低了cPu运行时间,计算也简单易行,最后给出了模拟分析．     

配水管网测压点的动态组合预测方法

通过对测压点水头序列的统计分析 ,得到其周期性、趋势性及随机扰动性的变化规律 .利用时间序列分析手段及动态建模方法建立了配水管网测压点的动态预测模型 ,利用加权递推最小二乘法 ( RLS)解决了模型参数的动态估计问题 .经实际供水系统使用验证 ,该法预测误差小 ,适应性强 ,可应用于供水系统的实际运行中.     

热载体再生时碳和氢燃烧动力学的同时测定

提出了同时测定热载体再生时碳和氢燃烧动力学的实验方法并建立了实验装置.用外推法处理实验数据.得到了热载体再生动力学方程.结果表明.热载体与CRC—1裂化催化剂再生动力学方程在形式上是一致的.只是动力学常数有些差别.该方法及实验装置同样适用于裂化催化剂再生动力学的研究.     

STUDY ON DATA PROCESSING WITH DERIVATIVE IN DIFFERENTIAL PULSE POLAROGRAPHY——PART Ⅰ: THEORY

The formulas of current of first and second derivative of differential pulse polarography (DPP) which has been deduced in this paper indicate that derivative may be enhance the sensitivity of DPP. By the analogy/data transformation、smoothing、and numerical differentiation, we can obtain the derivative current of DPP.     

瓶装物料冷冻干燥的模拟与实验

通过实验值与模型的模拟值比较发现，模型对升华干燥阶段模拟较好。通过模型分析，研究了物料内部的温度分布、升华界面与时间的关系、侧面输入热量对过程的影响、物料厚度与瓶径之比对干燥速率的影响     

A semi-analytical approach for stiffness modeling of PKM by considering compliance of machine frame with complex geometry

Stiffness modeling is one of the most significant issues in the design of parallel kinematic machine （PKM）. This paper presents a semi-analytical approach that enables the stiffness of PKM with complex machine frame geometry to be estimated effectively. This approach can be implemented by three steps： （i） decomposition of the entire system into two sub-systems associated with the parallel mechanism and the machine frame respectively; （ii） stiffness modeling of each sub-system using the analytical approach and the finite element analysis; and （iii） generation of the stiffness model of the entire system by means of linear superposition. In the modeling process of each sub-system, the virtual work principle and overall deflection Jacobian are employed with special attention to the bending rigidity of the constrained passive limb and the interface stiffness of the machine frame. The stiffness distribution of a 5-DOF hybrid robot named TriVariant-B is investigated as an example to illustrate the effectiveness of this approach. The contributions of component rigidities to that of the system are evaluated using global indices. It shows that the results achieved by this approach have a good match to those obtained through finite element analysis and experiments.     

沉降预测中的灰色模型理论与Asaoka法

在沉降预测的各种方法中 ,Asaoka法是其中主要方法之一 ,而灰色模型理论也开始得到应用 .本文对两种方法的一阶微分方程作了比较 ,证明在一定条件下 ,灰色模型理论和 Asaoka法两者的一阶微分方程是严格一致的 ,这对灰色模型理论在地基沉降预测中的推广应用具有重要意义.     

Brownian motion: absolute negative particle mobility

Noise effects in technological applications, far from being a nuisance, can be exploited with advantage - for example, unavoidable thermal fluctuations have found application in the transport and sorting of colloidal particles and biomolecules. Here we use a microfluidic system to demonstrate a paradoxical migration mechanism in which particles always move in a direction opposite to the net acting force ('absolute negative mobility') as a result of an interplay between thermal noise, a periodic and symmetric microstructure, and a biased alternating-current electric field. This counterintuitive phenomenon could be used for bioanalytical purposes, for example in the separation and fractionation of colloids, biological molecules and cells.