基于GASA和粗糙集的BT项目投资方融资方案选择研究

构建一套适用于"建设-移交"(BT)项目投资方的融资方案指标评审体系,探讨设计一种基于粗糙集理论的融资方案选择方法。通过遗传模拟退火方法对数据进行离散化处理,利用粗糙集和条件信息熵的方法计算指标评审体系中属性的权重,将求得权重代入传统的灰色关联分析评价法中计算加权灰色关联度,同时改良了灰色关联分析法的准确性,实现遗传模拟退火、粗糙集、灰色关联分析等理论的良好耦合。     

基于混合自适应的遗传工作流挖掘算法

针对遗传算法工作流挖掘容易过早收敛且局部寻优能力较差,导致得到的解不理想的情况,提出了一种基于混合遗传方法的工作流挖掘算法。该算法采用因果矩阵映射流程实例作为工作流模型的编码,在遗传算法的选择操作阶段采用锦标赛策略与精英保留策略相结合,在交叉变异阶段运用混合自适应方法,并结合模拟退火思想,使解的质量有了明显的提高。仿真实验表明,该算法与基于简单遗传方法的工作流挖掘算法相比效率更高。     

模拟酸雨处理土壤对绿豆植株某些生理性状的影响

通过盆栽绿豆试验,研究了不同pH值的模拟酸雨处理土壤对绿豆植株某些生理性状的影响。结果表明：随着模拟酸雨pH值的降低,叶片出现了皱缩、白色斑点、萎蔫等伤害症状；绿豆叶片的大小、株高、植株鲜重均明显受到了抑制；叶片叶绿素的含量略有增加；当酸雨的pH值为2．0时,植株表现出全部萎蔫的现象。     

Simulated moving bed separation of tocopherol homologues: simulation and experiments

Chromatograms of tocopherol homologues were obtained by a column of analytical size （inner diameter （ID） 0.46 cm cm×10 cm） packed with silica gel. Adsorption isotherms and film mass-transfer coefficient were estimated from the chromatograms by using a general rate model, which considers axial dispersion, external mass-transfer and intraparticle diffusion. Based on the obtained isotherms and mass-transfer coefficient, the separation process of tocopherol homologues on simulated moving bed （SMB） was simulated using the same model. According to the simulated results, a mixture of α-, γ-, δ-tocopherols and other impurities was separated on an SMB equipment. The SMB equipment was composed of 8 columns of ID 2 cm× 1 0 cm, with 2 columns in each section. The solid phase was silica gel, and the mobile phase was n-hexane/2-propanol （99/1 by volume）. γ- and δ-tocopherols of purity greater than 98% were obtained with recovery greater than 98%. The effects of operating conditions （flow rates and switching time） on the performance of SMB were studied by both simulation and experiments. It was found that all the simulation results were quite close to the experimental results. We conclude that process development and optimization of operating conditions of SMB by simulation are feasible.     

一种改进的和声退火算法

和声搜索算法是最近提出的一种基于乐队和声调谐原理的新搜索算法,目前已经有许多成功的应用。针对和声退火算法的不足,通过简化退火降温方式和终止条件,以及采用模拟退火算法修改和声库中最差解的更换方式,提出了一种改进的和声退火算法,数值实验表明了改进的和声退火算法的有效性和优越性。     

中职“模拟导游”市场导向教学的研究与实践

中等职业教育的人才培养模式,是目前教育界和中等职业学校广泛关注的热点。模拟导游课程是中等职业学校旅游类专业开设的一门理论与实践结合的重要专业课程,主要培养学生专业实践技能。本人通过课程的基本情况,结合中职教育与管理的实际,从教学模式（四维教学目标、教学五个环节）、校企合作等方面对中职教育以“以市场为导向”的人才培养模式进行探讨。     

“模拟公司”:中国高等职业教育发展的最佳选择

为满足各类企业对经营、生产和管理人才的需要,我国教育主管部门及许多高等职业院校都在探索与其相适应的职业教育发展模式“,模拟公司”是一种举世公认的商务实践教学模式,运用该模式,可以使我国高职教育更好地发展,以适应目前社会发展之需要。     

会计模拟实习教学研究

本文通过对会计模拟实习教学方法的总结和存在问题的分析，提出了加强会计模拟实习教学，教材内容、实习方式改革的一些设想，并对为达到教学目标，深化会计模拟实习教学方法进行了详细的探讨。     

Mathematical modeling of salt-gradient ion-exchange simulated moving bed chromatography for protein separations

The salt-gradient operation mode used in ion-exchange simulated moving bed chromatography (SMBC) can improve the efficiency of protein separations. A detailed model that takes into account any kind of adsorption/ion-exchange equilibrium, salt gradient, size exclusion, mass transfer resistance, and port periodic switching mechanism, was developed to simulate the complex dynamics. The model predictions were verified by the experimental data on upward and downward gradients for protein separations reported in the literature. All design and operating parameters (number, configuration, length and diameter of columns, particle size, switching period, flow rates of feed, raffinate, desorbent and extract, protein concentrations in feed, different salt concentrations in desorbent and feed) can be chosen correctly by numerical simulation. This model can facilitate the design, operation, optimization, control and scale-up of salt-gradient ion-exchange SMBC for protein separations.     

NiSi／Si（001）声子模式对称性分析

通过极化拉曼对以Si（001）为衬底、生长方向为NiSi[200]//Si[001]NiSi薄膜材料的拉曼峰进行了声子模式的分组,确定实验得到的NiSi薄膜的六个拉曼峰分别属于三类声子模式．其中213cm^-1、295cm^-1和367cm^-1处拉曼峰属于Ag对称性;196cm^-1和254cm^-1处拉曼峰属于B3g对称性;401cm^-1。处拉曼峰属于B1g或B2g对称性．