P systems based multi-objective optimization algorithm

Based on P systems, this paper proposes a new multi-objective optimization algorithm (PMOA). Similar to P systems, PMOA has a cell-like structure. The structure is dynamic and its membranes merge and divide at different stages. The key rule of a membrane is the communication rule which is derived from P systems. Mutation rules are important for the algorithm, which has different ranges of mutation in different membranes. The cooperation of the two rules contributes to the diversity of the population, the conquest of the muhimodality of objective function and the convergence of algorithm. Moreover, the unique structure divides the whole population into several sub populations, which decreases the computational complexity. Almost a dozen popular algorithms are compared using several test problems. Simulation results illustrate that the PMOA has the best performance. Its solutions are closer to the true Pareto-optimal front     

浮选柱的研究现状应用与前景

该文介绍了国内外浮选柱的发展现状及不同类型浮选柱的结构特点以及应用。结果表明,浮选柱工艺指标先进、动力消耗小、节能明显、维护方便,是细粒煤浮选脱硫降灰有效而经济的工艺设备,具有广阔的应用前景。     

Numerical simulation on the evolution of sediment waves caused by turbidity currents

Interest in the forming mechanism of sediment waves increases recently because of its significance on submarine engineering, sedimentary dynamics and hydrocarbon reservoir prediction in deep water. In this paper, the time-averaged continuity equations and Reynolds-averaged Navier-Stokes equations are applied in the numerical simulation of fluid dynamics. The modeling results are used to illuminate the effects of topography on turbidity current and explore the origin of submarine sediment waves. The research results show that (1) deposition occurs firstly at the lower ramp due to the deceleration of fluid, increase of density, loss of flow capacity and longer duration of flow passage; (2) density increase at the upslope due to the local jam results in velocity decrease and pressure increase; (3) sediment waves begin to be formed and migrated toward upstream in an area far away from the source with in- crease of the turbidity events; (4) deposition becomes more slowly with decrease of grain sizes, but the shape and sequences of these deposits are controlled by topography, not grain size.     

马尾松愈伤组织诱导条件的研究

采用马尾松(Pinus massoniana Lamb.)成熟合子胚为起始材料,经过0.1%升汞溶液7~9min消毒后,接种于WPM培养基上,在温度26℃,光照强度2 000~3 000 lx,光照时间16 h/d的条件下培养得到无菌苗.采用无菌苗的各器官作为外植体在光照条件下进行愈伤组织的诱导条件的研究,结果显示,以幼茎为外植体,在含GD 6-BA 4.0 mg.L-1 NAA 0.10 mg.L-1 0.3%~0.4%活性碳(CA) 500 mg.L-1水解酪蛋白的培养基上,愈伤组织诱导率可达到93%.     

论红色资源在推进社会主义核心价值体系培育中的应用

红色资源承载着中国化的马克思主义、革命传统精神和共产主义伦理道德,具有思想意识的引领、政治方向的引导、精神价值的传承、道德品德的教化等作用。在利用红色资源推进社会主义核心价值体系培育中,要科学开发三种载体的红色资源、搭建三个培育平台、拓展三种培育途径。     

一类双边障碍问题的积极集算法

双边障碍问题是一类应用十分广泛的问题.使用积极集算法求解带T-单调算子对应的双边障碍问题,建立了算法的单调收敛性定理.     

山西的无隔藻属植物

本文报道了山西省的无隔藻属植物11种1变种和2变型。除双叉无隔藻和无柄无隔藻2种外,其余均为山西省新记录。     

油润滑状态下载荷动特性对磨损的影响

在自行研制的环－块磨损试验装置上，研究了油润滑状态下矩形波载荷特性对４５＾＃钢－ＺＣｕＺｎ１６Ｓｉ４黄铜摩擦副磨损的影响。结果表明：其磨损过程存在跑合期和稳定磨损期；矩形波载荷的占空比对其磨合过程有显著影响，占空比愈小，跑合期磨损量愈小，跑合期愈长。通过控制载荷波形参数，可以优化其磨合规范。     

非满载车辆调度问题的遗传算法

非满载车辆调度问题是车辆调度问题中的一个基本问题，由于它是一个典型的NP难题，传统方法的求解结果往往不能令人满意。本文采用最大保留交叉、交叉率和变异率自适应变换等技术，设计了基于自然数编码的遗传算法，用于求解非满载车辆调度问题，在实验分析中获得了较好的结果。     

对高等工程专科教材管理改革的思考

概括了目前教材管理中普遍存在的问题，并探讨了解决问题的基本途径──确立教材管理新观念和建立教材管理新机制。