Rheology of aqueous BeO suspension with NH4PAA as a dispersant

The effects of dispersant amount and solids loading on rheological behaviors of aqueous BeO suspensions were investigated. The relationship of viscosity and solids loading determined experimentally was compared with five various existing models. BeO aqueous suspensions exhibited a shear dependent behavior from shear thinning to shear thickening with the increasing of shear rate. The rheological behaviors of the suspensions are in reasonable accord with the model proposed by Liu, and are basically consistent with the Dabak model and Chong model, but are discrepant to other two models proposed by Krieger–Dougherty and Kitano. The maximum solids loading is estimated to be 0.577.     

基于Android的无线点餐系统设计

近年来,Android手机的巨大发展,使得设计新式的无线点餐系统成为可能.从客户端、服务器端全面讨论了该点餐系统的设计原理和过程,包括客户端的登陆、点菜、更新、结账等模块,以及服务器端的web服务器、数据库服务器、Web工程和MFC工程等模块.经实际测试和应用表明：该系统具有较高的可靠性和实用性.     

五值非线性序集逻辑系统的随机化

利用赋值集的随机化方法,在五值非线性序集逻辑系统L25中提出了公式的随机真度和随机距离,建立了其上的随机逻辑度量空间,它是计量逻辑学和随机逻辑学在非线性序集逻辑系统上的推广.     

无线Mesh网络中的传输层跨层设计研究

为了改善无线Mesh网络的传输性能,提出的跨层设计思想打破原有的网络模块化、标准化设计思想,在已有的各种支持无线Mesh传输层QoS跨层设计方案的基础上,分析总结了传输层TCP跨层设计的相关参数、设计方法,提出了一种联合传输层、MAC层、物理层TCP拥塞控制策略.通过RTT(往返时间)值,实时估计网络当前可用带宽,优化TCP拥塞控制策略.实验结合数据报文成功传输率与位误码率,提高了网络有效资源的利用率,改善了无线网络的性能.     

荻原料烧碱-蒽醌法蒸煮过程中甲醇发生量的研究

采用顶空气相色谱法测定烧碱-蒽醌法蒸煮荻原料过程中甲醇的发生量,并研究在不同工艺条件(用碱量、蒸煮温度、蒸煮时间)下甲醇的发生规律.结果表明,用碱量、保温时间和蒸煮温度对甲醇发生量的影响很大,随着用碱量、保温时间和蒸煮温度的升高,甲醇发生量迅速增多,用碱量由10%增加到20%,甲醇发生量从2.34,kg/t(相对于绝干浆,下同)增加到5.06,kg/t;保温时间由10,min延长到40,min时,甲醇发生量由2.08,kg/t增加到3.88,kg/t;当最高蒸煮温度由145,℃升高到170,℃时,甲醇发生量从2.02,kg/t增加到4.37,kg/t.升温时间对甲醇发生量的影响比较小.     

"化学工艺学"培养学生创新能力的举措

为培养具有创新能力的地方产业发展所需人才,在化学工艺学的教学中,可通过优选教学内容、改进教学方式、营造创新氛围等方式,在课堂教学、实验实训、科技竞赛等环节培养和提升学生的创新意识和能力。实践证明,这些教学措施明显提升了我校化工专业学生的创新实践能力和专业技能,增强了学生的就业能力。     

运用新型Briggs-Rauscher化学振荡测定橙皮素

利用橙皮素对四氮杂大环镍催化的Briggs-Rauscher(BR)化学振荡体系(KIO3-[NiL](ClO4)2-H2SO4-H2O2-MA)的扰动建立测定橙皮素的新方法.其中,四氮杂大环镍配合物[NiL](ClO4)2中的配体L为5,7,7,12,14,14-六甲基-1,4,8,11-四氮杂环-4,11,-二烯.分析结果表明,当橙皮素的浓度在1.5×10-6~1.58×10-4 mol·L-1之间时,抑制时间与加入橙皮素浓度之间有良好的线性关系.文章对各组分浓度的影响进行探讨,从而获得最佳检测浓度,同时运用循环伏安对其扰动机制进行了探讨.     

Numerical study on solid–liquid phase change in paraffin as phase change material for battery thermal management用于电池热管理的石蜡相变材料固液相变的数值模拟

With the large latent heat and low cost, the paraffin has been widely used in battery thermal management(BTM) system to improve the efficiency and cycling life of power battery. The numerical model of paraffin melting in a cavity has been established, and the effects on the solid–liquid phase change process have been investigated for the purpose of enhancing the heat transfer performance of paraffin-based BTM system. The results showed that the location of the heating wall had great effects on the melting process. The paraffin in the cavity melted most quickly when the heating wall located at the bottom. Furthermore, the effects of thermal conductivity and the velocity of the slip wall have been considered. The gradient of liquid fraction increased with the increase in thermal conductivity, and the melting process could be accelerated or delayed by the slip wall with different velocity.