基于验模技术的水下滑翔机前舱体结构强度分析

针对水下滑翔机前舱段结构,首先基于ANSYS建立了仿真模型;然后采用基于离散误差控制的验模技术对其进行可信度评估,优化了ANSYS网格参数,提高了结构强度计算精度。在验模后仿真模型的基础上,对主要设计参数进行了敏感性分析,为后续的结构优化设计和可靠性设计提供了理论指导。     

在线智能重量测量仪的设计

本文介绍了在线智能重量测试仪的设计过程。详细介绍了在线仪表的功能、硬软件的实现。多次实际应用表明该重量测量仪精确度、灵敏度和稳定性均达到设计要求,且造价低廉、操作更加方便。     

脉冲磁场在旋流-静态微泡浮选柱中的应用

为降低某磁铁矿选矿厂的浮选尾矿品位,进行了新型磁浮选脱硅试验研究。结果表明,相比常规旋流-静态微泡浮选柱1次粗选、2次扫选反浮选工艺流程,浮选柱柱体附加脉冲磁场后采用1次粗选、1次扫选工艺流程,在入浮原矿性质和精矿品位基本相同的情况下,浮选时间缩短了30%,尾矿品位降低了6.35个百分点,回收率提高0.95个百分点。磁浮选方法在磁铁矿反浮选中的应用,为我国磁铁矿分选开辟了一条新的途径。     

铁精粉在线品位分析仪的研制

本文介绍了一种利用AT89C2051单片机技术研制的对铁精粉品位的在线测量系统。并对该系统的功能、硬软件实现进行了详细的介绍。工程实践表明:该系统测量准确、可靠、方便,能够在实际工程中加以推广。     

风力机系统的动力学性能分析

采用叶素动量理论对风力机进行气动力的计算分析,用VC开发计算程序,将计算的气动载荷加载到风力机ADAMS仿真模型上,在MATLAB/Simulink下建立风力机传动系统的仿真模型;将传动系统模型同ADAMS模型进行联合,实现对风力机系统总体性能的联合仿真.将仿真数据同国际风力发电专用计算软件计算数据比较,表明该联合仿真方法可以较好地模拟风力机的总体性能.     

风力机总体性能分析与仿真

采用叶素动量理论对风力机进行气动力的计算分析,用VC开发计算程序,将计算的气动载荷加载到风力机AD-AMS仿真模型上,在MATLAB/Simulink下建立风力机传动系统的仿真模型;将传动系统模型同ADAMS模型进行联合,实现对风力机系统总体性能的联合仿真.仿真数据同国际有名的风力机分析软件计算数据比较,结果表明,该联合仿真方法可以较好地模拟风力机的总体性能.     

铝酸钠溶液表面张力的化工数学模型

采用正交实验方法研究铝酸钠溶液的表面张力数学模型。结果表明，Na2O浓度和温度对溶液表面张力的影响显著。Al2O3浓度影响不显著，交互相和二次相的影响可以忽略。溶液表面张力随Na2O和Al2O3浓度增加而增加。随温度升高而降低。数学模型在试验区拟合很好，由数学模型计算得出的表面张力与实际测量值偏差较小。可以满足氧化铝生产的实际需要。     

粮库温度采集系统的设计与实现

本文首先分析了已有的粮库温度采集系统及相关器件的发展现状,在此基础上讨论现场环境、外界干扰、粮垛内温度场的分布情况。根据实际条件对测温系统的要求,提出本方案的依据及硬件部分的详细电路。最后,对整个系统进行了误差分析,并采取了有效的抗干扰措施,从而提高了测量的精度,较好解决了对粮库温度的采集问题。     

Photocatalytic activity of cerium-doped mesoporous TiO2 coated Fe3O4 magnetic composite under UV and visible light

A novel kind of magnetically separable photocatalyst of cerrium-doped mesoporous titanium dioxide coated magnetite (Ce/MTiO2/ Fe3O4) was prepared and its activities under UV and visible light were reported. The catalysts with Ce/MTiO2 shell and Fe3O4 core were pre-pared by coating photoactive Ce/MTiO2 onto a magnetic Fe3O4 core through the hydrolysis of tetrabutyltitanate (Ti(OBu)4, TBT) with pre-cursors of ammonium ceric nitrate and TBT in the presence of Fe3O4 particles. The MTiO2 shell was for photocatalysis, the Fe3O4 core was for separation by the magnetic field and the doped Ce was used to enhance the photocatalytic activity of MTiO2. The morphological, struc-tural and optical properties of the prepared samples were characterized by Brunauer-Emmett-Teller (BET) surface area, transmission electron microscopy (TEM), X-ray diffraction (XRD) and UV-vis absorption spectroscopy. The effect of cerrium-doped content on the photocatalytic activity was studied and the result revealed that 0.5 mol.% Ce/MTiO2/Fe3O4 exhibited highest photoactivity. The photocatalytic activities of obtained photocatalysts under UV and visible light were estimated by measuring the degradation rate of methylene blue (MB, 50 mg/L) in an aqueous solution. The results showed that the prepared photocatalyst was activated by visible light and used as effective catalyst in photooxi-dation reactions. In addition, the possibility of cyclic usage of the prepared photocatalyst was also confirmed. Moreover, Ce/MTiO2 was tightly bound to Fe3O4 and could be easily recovered from the medium by an external magnetic filed. So, the photocatalyst can be reused without any mass loss. It can therefore be potentially applied for the treatment of water contaminated by organic pollutants.     

某弱磁选铁精矿磁浮选柱精选半工业试验

用磁浮选柱替代现场的浮选机对某弱磁选精矿进行了提铁降杂精选试验,具体探讨了捕收剂MH和铁矿物抑制剂淀粉的用量、外加脉冲磁场场强和试验设备处理量对分选指标的影响,结果表明,在最佳工艺技术条件下,可获得铁品位为69.85%、作业铁回收率为99.05%的最终铁精矿。