用磁控溅射和真空硒化退火方法制备高质量的铜铟硒多晶薄膜

用双靶磁控溅射的方法在玻璃衬底上制备了Cu11In9合金薄膜,然后将Cu11In9合金薄膜封闭在石墨盒中进行真空硒化退火得到CuInSe2薄膜.用扫描电子显微镜(SEM)和X射线粉末衍射(XRD)对CuInSe2薄膜进行了表征,结果表明CuInSe2薄膜具有单一的晶相,均匀、致密的结构,以及粒径超过了3μm的晶粒. 关键词： 铜铟硒多晶薄膜 磁控溅射 真空硒化 太阳能电池     

长脉冲强流二极管径向绝缘研究

 介绍了一种应用于长脉冲强流二极管的径向绝缘结构。简介了真空表面闪络机理，径向绝缘结构的设计思路。采用锥形绝缘结构，使用计算机模拟静电场分布优化设计了几何结构参数，在脉宽为200ns的脉冲源上进行了实验研究。二极管最高输出电压为750kV，平均绝缘子表面耐电场强度约50kV/cm，达到了设计要求。     

射流式真空紫外辐照模拟设备及其应用

介绍了空间环境条件下真空紫外辐照 (VUV)的损伤效应 ,以及真空紫外辐照模拟的几种主要形式。着重讲述了射流式真空紫外辐照模拟设备的基本结构、工作原理、技术参数及特点 ,并利用该设备初步研究了几种空间材料的真空紫外辐照损伤效应。结果表明 ,VUV使EP和CF/EP产生了明显的质损 ,导致力学性能下降 ,纤维和基体表面受到明显破坏。VUV与温度交变对聚酰亚胺吸光涂层的力学性能有明显影响。     

可实现真空和气氛退火的高精度温控退火炉的研制

从退火炉的整体构造，管端配件的设计、控温电路和温度程序控制调节器的使用三个方面，介绍了由同济大学玻耳固体物理研究所自行研制的小型高精度温控退火炉装置，并针对典型的晶体退火过程，详细分析了温控系统中PID参数的选取和控温程序的调度工作，通过不同气氛条件下对钨酸铅（PbWO4)的退火处理实验证实，这套装置能够满足晶体生长后期退火处理的实际需要。     

Simulated annealing and quantum detailed balance

The analogue of simulated annealing is considered for time-inhomogeneous evolutions of a von Neumann algebra of operators, whose instantaneous generator at each timet satisfies the quantum detailed balance condition with respect to a faithful normal state which depends on time through a suitable cooling schedule. Convergence to the (nonfaithful) limiting state is proved under the usual kinds of assumptions. The approach is interesting in view of possible applications to stochastic Ising models and to Boltzmann machines.     

Surface energy evaluation of unhydrogenated DLC thin film deposited by thermionic vacuum arc (TVA) method

The aim of this paper is concerned with the surface energy evaluation by contact angle measurements of DLC films deposited by thermionic vacuum arc (TVA) on different substrates: glass plate, zinc foil, stainless steel and alumina foil. TVA is an original method based on a combination of the evaporation by electron bombardment and anodic arc. The evaluation of the surface free energy has been carried out by surface energy evaluation system (SEE System). The influence of the experimental conditions is also investigated.     

基于区域似然比的SAR图像变化检测

针对传统基于像素的变化检测方法受Speckle噪声影响严重的问题，在区域分割的基础上，提出似然比检测的方法，获得了良好的检测结果．该方法先针对多时相SAR图像数据样本的统计模型提出未知和变化两种假设，然后采用似然比检验方法对两种假设进行检验，从而获得区域的变化检测结果．实验表明，该方法很大程度上降低了SAR图像乘性噪声在变化检测过程中带来的误检和漏检效应，将检测的精确度提高了22％，从而比较准确地反映了SAR图像区域的变化，具有很好的应用前景．     

Comparative study of two extraction techniques to obtain representative aroma extracts for being analysed by gas chromatography-olfactometry: application to roasted pistachio aroma

This research paper presents a comparative study of two different extraction and concentration techniques to obtain representative pistachio aroma extracts: the traditional direct solvent extraction (DSE) followed by high-vacuum transfer (HVT) and the headspace solid-phase microextraction (HS-SPME). The results showed that, although both techniques provide accurate information about the aromatic composition that will be perceived by the consumer, the precision in terms of within-day repeatability and between-days repeatability (intermediate precision) of the chromatographic areas presented better values for HS-SPME than for DSE-HVT. Moreover the solvent-free HS-SPME allows the extraction of more odour-active regions, requires very little sample handling and shorter time for sampling.     

Simulated annealing for Lévy-driven jump-diffusions

We consider a one-dimensional dynamical system driven by a vector field −U^′$-U^{\prime }$, where U$U$ is a multi-well potential satisfying some regularity conditions. We perturb this dynamical system by a stable symmetric non-Gaussian Lévy process whose scale decreases as a power function of time. It turns out that the limiting behaviour of the perturbed dynamical system is different for slow and fast decrease rates of the noise intensity. As opposed to the well-studied Gaussian case, the support of the limiting law is not located in the set of global minima of U$U$.