双核铜配合物[Cu~2(OPPh~3)~2(C~6H~5CO~2)~4]的合成、结构和性质

通过金属铜粉和过氧化苯甲酰的氧化加成反应合成了双核铜配合物[Cu~2(OPPh~3)~2(C~6H~5CO~2)~4], 以元素分析、IR、TG、磁性及粉末衍射表征了配合物的结构, 并对其单晶进行了X射线衍射分析。     

沪市股票风险与收益关系实证研究

由于我国股票市场每日报酬时间序列的非正态性和厚尾性,且呈现波动集群性,基于正态假设的静态模型存在很大的缺陷,而Arch类模型具有很好的处理厚尾的能力,能较好的描述股价等金融变量的波动特征,因此将Garch-M模型引入,通过实证分析,结果表明,Garch-M模型能显著提高预测的准确性.     

Electronic Structures of PbWO4 Crystals Containing F-Type Colour Centres

Electronic structures of PbWO4 crystals containing F-type colour centres with the lattice structure optimized are studied within the framework of the fully relativistic self-consistent Dirac-Slater theory, using a numerically discrete variational （DV-Xα） method. The calculated results show that F and F^＋ centres have donor energy levels in the forbidden bands. Their optical transition energies are 1.84 eV and 2.21 eV, respectively, which correspond to the 680nm and 550 nm absorption bands. It is predicted that the 680 nm and 550nm absorption banas originate from the F and F^＋ centres in PbWO4 crystals.     

Investigation of pulsed laser ablation process of Hg_(0.8)Cd_(0.2)Te

The vaporization threshold was measured under the irradiation of 1.064-μm,10-ns pulsed laser.Then we calculated the vaporization temperature based on the conservation law of energy and analyzed the vaporization time based on our established model.These results coincided well with the information from the micrograph of scanning electron microscope(SEM)and the spectra of the plasma.Besides,the laser ablation rate was also computed and discussed theoretically.     

内肋套管管内流动与换热特性研究

利用实验和数值模拟方法考察了含水原油在内肋套管内的流动与传热性能,指出了在 Re=200～1200 时管子结构尺寸(肋片高度、肋片宽度和肋片长度)对传热性能的影响,并进行了实验验证.     

单耗分析理论与超(超)临界机组机炉参数匹配问题研究

本文简要介绍了能源利用的单耗分析理论,并将其应用于锅炉和发电机组,推导出其第二定律效率.结果显示锅炉不仅取决于其热效率,更重要的是取决于其热产品的品位.省煤器一直是锅炉必备设备,但分析发现其间工质吸热过程是发电厂热力循环的低温部分,称之为省煤器名不副实,它的存在甚至成为机炉参数优化匹配、提高锅炉和发电机组第二定律效率的制约因素.因此本文根据单耗分析理论,提出去掉锅炉省煤器,并开展了机炉参数优化配置问题研究,探讨了进一步提高机组发电效率的途径.     

All-optical NRZ-to-AMI conversion using linear filtering effect of silicon microring resonator

We experimentally demonstrate 10-Gb/s format conversion from non-return-to-zero （NRZ） to alternatemark-inversion （AMI） using the linear filtering effect of silicon microring resonator. Our discussion and analysis in simulation further show that a 10-Gb/s AMI signal with good quality can be obtained by a resonator with a notch depth larger than 25 dB when the 3-dB bandwidth is 0.4 nm.     

两偏振分量不同分布的一维矢量光折变空间光孤子

分别自耦合和互耦合两种情况研究了光折变晶体中的一维矢量光折变空间孤子.分别亮孤子和暗孤子情形导出了两偏振分量所遵从的非线性波方程,讨论了其传播常量.     

稀土铽配合物的升频转换荧光

以波长为532nm的激光作为激发光,观测了铽(Tb)三种不同配合物的荧光光谱,讨论和分析了铽配合物的升频转换荧光的特性、发光机制及配体的影响.     

高能强子–强子碰撞中喷注内部动力学起伏的蒙特卡洛研究

用蒙特卡洛方法对CERN-SppS对撞机质子–反质子对撞中由圆锥法判定的(微)喷注内部的动力学起伏进行了研究.结果表明,喷注内部的动力学起伏近似地和SpS静止靶强子–强子碰撞中的动力学起伏一样,呈现为纵–横各向异性,而在横向平面内各向同性的特征.