基于双极偏好控制的多目标粒子群优化算法

考虑双极偏好信息对粒子群的控制作用,提出一种使用双极偏好——正偏好和负偏好引导粒子群向 Pareto 前沿偏好区域进化的方法．根据TOPSIS 决策法思想,将外部种群粒子与正负偏好点的相对贴近度排序作为 外部种群管理和全局最优解更新策略;根据贴近度值确定解集的分布度;选取6 种不同类型的多目标测试函数进行 算法模拟,从世代距离、空间测度和超体积测度3 个指标与基于单极偏好的多目标粒子算法进行性能比较．结果显 示,基于双极偏好控制的多目标粒子群算法的收敛性和综合性能更优秀．     

酒石酸还原Cu(Ⅱ)制备多种形貌Cu_2O晶体及形成机理

以CuSO_4·5H_2O为原料,KOH为添加剂,酒石酸为还原剂,在水热条件下通过调整相关的实验参数,制备了一系列不同形态的Cu_2O微-纳米晶体及三维十字形枝晶。采用XRD、SEM等手段对不同形态的Cu_2O晶体进行了表征,探讨了不同因素变化对Cu_2O晶体形态的影响。分析认为,晶体生长过程控制了晶体的具体形貌和大小,Cu_2O晶体显露的单形晶面随晶体生长条件的变化而不同。在低温、弱碱性、高浓度溶液中有利于形成八面体形态的Cu_2O晶体,而菱形十二面体单形晶面在高温、强碱性、低浓度溶液中形成的晶体中显露的面积有所增大。     

“TCP/IP网络设计及实现”双语课程教学模式探讨

"TCP/IP网络设计及实现"双语课程旨在从实现的高度帮助学生深入理解各种网络协议和技术,提高学生系统软件编程水平,并利用双语平台增强学生的外语听说能力,为学生今后的学习和发展奠定基础。作者从分析课程的特点出发,结合引入双语教学的必要性和存在的问题,主要从教学内容的选择和组织、庞大源码的讲解、实践环节的设置等方面,探讨了该课程的教学模式。     

叶面积指数遥感反演算法研究

叶面积指数是确定陆表生态系统物质和能量交换大小的重要结构参数之一。本文基于NDVI、RVI的反演模型,结合GDAL影像库和C++语言设计实现相关算法,形成从影像数据到叶面积指数图的处理流程,提高了影像的利用率。经预处理的Hyperion数据测试,算法运行稳定且计算结果精确,为植物长势监测、粮食产量预测提供可靠数据源。     

基于机器视觉的实时丸药检测系统

丸药是最为常见的药品剂型,最后成品的外观都要求圆整均匀、色泽一致,在丸药检测方面使用机器视觉技术有着良好的应用前景。通过对丸药实时检测方法和途径的分析探讨,提出了完整的工作循环模式。根据此模式,给出了利用Matlab和visual studio开发实时检测系统的完整方案。     

The aeroelastic effects on the scatter phenomenon of wind-tunnel data

The unsteady Reynolds-averaged Navier-Stokes equations coupled with the k SST turbulence model are solved to obtain the steady and unsteady aerodynamic forces for airfoils and wings.The effects of vibration types and amplitudes on aerodynamic forces of airfoils and wings are studied.The deformation characteristics of a swept wing induced by steady aerodynamic load are presented.It is found that for a vibrating elastic wing at small and medium incidences,its mean aerodynamic loads are almost the same as those obtained from the static one.On the contrary,at high incidences especially around the stall incidence,the vibration may change the mean values.In addition,the larger amplitude is,the larger discrepancy will be.For a swept wing,the steady aerodynamic loads usually lead to the "pitching down" effect on the wing tip which delays the stall compared with a rigid one;But this phenomenon dose not occur on a aeroelastic wing which can induce the separation ahead and trigger the stall.The above conclusions are in good agreement with the scatter characteristics of wind-tunnel data.The reason why the data obtained from wind tunnel and CFD are different is also analyzed.Meanwhile,it can be an explanation for scatter phenomenon of wind-tunnel data,especially for high incidence cases,which remains a puzzle so far.     

龙开口水电站枢纽工程关键技术研究

龙开口水电站枢纽采取主河床泄洪、右岸坝后厂房布置形式,大坝为碾压混凝土重力坝.大坝的防震抗震,右岸变形体边坡治理,骨料料源选择、加工及运输,河中深槽处理,施工导流技术,泄洪消能技术,尾水渠粉质边坡治理等问题是工程建设的关键技术问题.针对这些问题,在可研、招标及技施阶段开展了大量研究工作,取得了许多有价值的成果,最终制定了合理的设计方案,为工程建设提供了技术保障.     

Effects of AMF on soil enzyme activity and carbon sequestration capacity in reclaimed mine soil

A series of pot experiments and field trials were carried out to evaluate the effects of arbuscular mycorrhizal fungi (AMF) on activities of soil enzymes and carbon sequestration capacity in reclaimed mine soil. A complex substrate of coal gangue, fly ash and sludge was used as reclaimed mine soil, and ryegrass was planted with AMF inoculation to construct a plant-complex substrate-microbe ecological restoration system. The changes to the soil organic carbon (SOC), activities of soil enzymes and glomalin-related soil protein (GRSP) were measured and the effects of AMF on activities of soil enzymes and carbon sequestration capacity in reclaimed mine soil were analyzed. The results show that the contents of GRSP (total glomalin (TG) and easily extractable glomalin (EEG)), SOC and activities of enzymes increased, and the increments were higher in the AMF inoculation treated plant-complex substrate-microbe ecological restoration systems than those with no AMF inoculated treatments after 12 months of ryegrass growth. TG, EEG and soil enzyme activity have a significant positive correlation, and the correlative coefficient was 0.427–0.573; SOC and TG, EEG have a significant positive correlation (p < 0.01), indicating that AMF plays an important role in carbon sequestration of reclaimed mine soils.     

光存储材料CaS∶Eu,Sm的正交实验制备及表征

CaS∶Eu,Sm材料在光存储、光探测领域具有广阔应用前景,但制备过程中影响其发光性能的因素较多,彼此又有交互作用,不易获得最佳工艺参数。本文采用高温固相反应法,通过正交实验设计系统研究了灼烧温度、灼烧时间、稀土掺杂浓度、助溶剂用量对CaS：Eu,Sm发光性能影响的主次关系,经正交分析和验证实验确定了最佳工艺参数应为：Eu∶Sm∶Ca mol%=0.3∶0.3∶99.4%,1100℃灼烧0.5h,助熔剂LiF用量为7%。采用X射线粉末衍射仪、荧光分光光度计（耦合1064nm激光激励源）对样品的物相及发光性能进行了测试与表征。     

80 kt/a硫铁矿制酸扩建装置采用的新技术措施

针对采用水洗净化工艺的某80kt/a硫铁矿制酸装置的扩建设计，介绍了其中主要改扩建工段及设备采用的新技术措施，设计中对原料工段、沸腾炉、文氏管、泡沫塔、转化器、换热器等进行了改进，满足了厂方两期建设产量不同的要求。