A FUZZY NEURAL NETWORK DECISION MODEL ON THE OPERATION PROCESS OF ELECTRIC FURNACE FOR CLEANING SLAG AND ITS APPLICATION

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热丝化学气相沉积法原位制备的MgB2超导薄膜

用热丝化学气相沉积法(HFCVD)在蓝宝石基片上原位制备了MgB2超导薄膜,并用XRD、SEM和dc SQUIDs研究了基片温度和时间对薄膜相组成、表面形貌和超导临界转变温度Tc的影响.结果表明,HFCVD原位生长MgB2薄膜可以抑制MgO杂质的生成.基片温度在500℃以下,MgB4杂相容易出现;在500℃以上时,可以消除MgB4杂相;在600℃时,获得了纯单相的MgB2薄膜,其超导临界转变温度达到36 K.随基片温度升高,薄膜结晶性、致密度和超导临界转变温度提高.     

LiF-KF熔盐溶液热力学性质Monte Carlo法计算机模拟研究

本文用 Monte Carlo法对同离子系LiF-KF熔盐溶液的结构和性质进行了计算机模拟.对各离子间的偏径向分布函数和混合热、位能分布等的计算表明,LiF与KF熔盐混合后,Li~+,F~-离子间平均距离减少,与互易盐系LiF-KCl溶液的模拟结果相似.混合热的计算结果与实测值相当接近。混合热产生的原因:正离子间排斥能减少;正负离子间吸引能减少;负离子间排斥能减少。     

Operation optimization of concentrate burner in copper flash smelting furnace

The software that simulates the flow, temperature, concentration and the heat generation field in the Outkumpu flash smelting furnace, was developed by a numerical method of the particle-gas flow together with some chemical reaction models. Many typical operating conditions were chosen for simulation in order to obtain the effect of the distribution air, process air, central oxygen and the oil-burner position etc. The concepts about optimum op-eration, 3C(concentration of high temperature, high oxygen and laden concentrate particles), are concluded from these simulated results, which have been checked primarily by operational experiments.     

副保险杠翻边冲孔模的设计与改进

介绍了副保险杠翻边冲孔模的设计要点,同时通过改进结构,使模具的装配和调整变得简便。     

抗菌功能性铝基材料的制备及表征

通过交流电沉积的方法在铝阳极氧化膜的孔内沉积金属铜,制备了铝基抗菌功能性材料;测试了沉积铜的铝阳极氧化膜的抗菌性能.结果表明:电沉积铜的铝阳极氧化膜对大肠杆菌、绿脓杆菌、粪链球菌和金黄色葡萄球菌的抗菌率均大于95%.透射电子显微镜表征了铜在氧化膜孔内的沉积形貌,铜在铝阳极氧化膜孔内呈连续的线状形貌,直径为25 nm.     

无芯薄壁长矩形管弯曲模设计

介绍了避免无填料和衬芯的长矩形管弯曲成形后管壁出现内陷及折痕的工艺,模具结构特点及设计中注意的事项,模具结构合理,便于加工、装配及使用。对该类工件的弯曲成形有一定的参考价值。     

Hydrogen embrittlement susceptibility and permeability of two ultra-high strength steels

Slow displacement rate tensile tests were carried out in a saturated H₂S solution to investigate the effect of hydrogen embrittlement on notched tensile strength (NTS) and fracture characteristics of two ultra-high strength steels (PH 13-8 Mo stainless steel and T-200 maraging steel). Hydrogen permeation properties were determined by an electrochemical permeation method. The results of permeation tests indicated that over-aged specimens showed a lower diffusivity/hydrogen flux and higher solubility than those solution-annealed. The great increase in reverted austenite (irreversible hydrogen traps) together with numerous precipitates at the expense of dislocations (reversible) in the over-aged specimen led to such a change in permeability. Ordinary tensile tests indicated that four tested specimens had roughly the same yield strength level. Hence, the hydrogen embrittlement susceptibility of the material could be related to their permeation properties. The uniform distribution of strong hydrogen traps in over-aged specimens instead of weak traps in the solution-annealed impeded the hydrogen transport toward the strained region, thus, the resistance to sulfide stress corrosion cracking was improved in over-aged specimens.     

双动压力机多杆机构的计算机辅助运动分析

运用连杆机构分析的基本组法，开发了双动压力机多样机构计算机辅助分析的通用程序包，对于不同形式的多杆机构，通过其主程序与此程序包联结，可方便有效地完成机构运动的分析计算和动态模拟，并且给出了实例说明。     

无线体域网高能效竞争接入机制研究

低能耗是无线体域网WBAN通信最重要的指标.构建了IEEE 802.15.6无线体域网CSMA/CA竞争接入的功耗模型,分析了用户优先级、MAC帧负荷尺寸和数据到达量对信道接入能耗的影响,提出了一种通过数据汇聚传输提高能量效率的增强型信道接入方法.仿真结果表明,在低业务量及混合业务场景下,所提方法能够显著减少信道接入的能量消耗.