排序方式: 共有11条查询结果,搜索用时 15 毫秒
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采用溶胶-凝胶法在Pt(111)/ Ti/ SiO2/ Si(001)基片上制备了BiFe0.95Mn0.05O3(BFMO)薄膜,并构架了Pt/ SrRuO3/ BFMO/ Pt型电容器.X射线衍射(XRD)分析发现在650℃快速退火可以得到良好结晶质量的多晶薄膜.紫光入射到薄膜表面,电滞回线发生变化,这是由于光照在薄膜内部产生的光生载流子影响了退极化场的分布.研究表明,在紫光照射下,薄膜的漏电流密度变大,电导由5.1×10-7 S增大到6.63×10-7S.通过对暗电流密度的拟合发现,BFMO薄膜为欧姆导电机制. 相似文献
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In this paper we present a new simple controller for a chaotic system, that is, the
Newton--Leipnik equation with two strange attractors: the upper attractor (UA) and
the lower attractor (LA). The controller design is based on the passive technique.
The final structure of this controller for original stabilization has a simple
nonlinear feedback form. Using a passive method, we prove the stability of a
closed-loop system. Based on the controller derived from the passive principle, we
investigate three different kinds of chaotic control of the system, separately: the
original control forcing the chaotic motion to settle down to the origin from an
arbitrary position of the phase space; the chaotic intra-attractor control for
stabilizing the equilibrium points only belonging to the upper chaotic attractor or
the lower chaotic one, and the inter-attractor control for compelling the chaotic
oscillation from one basin to another one. Both theoretical analysis and simulation
results verify the validity of the suggested method. 相似文献
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Based on real data,a new parameterized model of the main drift chamber response is proposed.In this model,we tune the ratio of good hits and the residual distribution separately.By data quality checking,the diference between simulation and data in track reconstruction efciency reduces from 1%to 0.5%averagely for the pion in J/ψ→π+ππ0,and the momentum resolution agreement improves significantly for the proton in J/ψ→ppˉ. 相似文献
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本文合成了一种新型配位聚合物[Cu(pa)(vim)2]n(pa为邻苯二甲酸阴离子,vim为1-乙烯基-1H-咪唑),并用x射线单晶衍射仪和元素分析表征了其单晶结构。晶体属单斜晶系,C2/c空间群,晶胞参数分别为:a=1.6527(3) nm, b=0.81800(16) nm, c=1.4463(3) nm, β=113.19(3)°, V=1.7973(7) nm3, Z=4, Dc=1.537 g?cm-3。 [I>2σ(I)]时:R1=0.0476, wR2=0.1235,对所有数据:R1=0.0693, wR2=0.1355。配合物的结构中存在沿着c轴的zigzag聚合链。每个铜原子位于晶体中心,与两个N原子和两个O原子进行配位,形成了扭曲的平面结构。电化学研究表明在配合物中Cu2+/Cu+的氧化还原是一个单电子的准可逆过程。 相似文献
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用活性碳纤维处理油页岩干馏废水 总被引:4,自引:0,他引:4
本文研究了用活性碳纤维处理高浓度,成份复杂的油页岩干馏废水。实验表明:活性碳纤维对含75种以上有机物,大量无机盐,CODcr低于1000mg/l,净化效率为98%以上,同时提高了BOD5/CODcr值,为进一步生化处理提供可能。活性碳纤维失效后经200-500℃过热蒸汽处理,可循环使用。 相似文献
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