Surface electrical conductivity in ZnS(Cu,Cl, Mn) thin films

The surface electrical conduction in an In₂O₃(Sn)/ZnS(Cu, Cl, Mn)/Al thin film system was investigated by measuring the dependence of the current through the ZnS(Cu, Cl, Mn) film on the application of a sinusoidal voltage to two electrodes on the surface of the film. The measurements were carried out in an arrangement with an additional d.c. voltage applied between one of the upper electrodes and the lower electrode. The results obtained are discussed on the basis of a proposed theoretical model.     

规整化人脸图像超分辨率重建的数值解法

提出了基于特征子空间规整化的人脸图像超分辨率重建（SRR）算法并给出了三种数值解法。在仿射变换运动模型下,将图像的四邻域插值方法拓展为图像的梯度场估计问题,推导出了待求高分辨率（HR）图像关于运动参数的雅科比矩阵;并根据对SRR代价函数的全微分和偏微分展开,将非线性的SRR问题转换为线性问题迭代求解,讨论了三种运动参数与HR图像的联合迭代估计算法。给出了SRR规整化参数的自适应计算方法以实现自动SRR。仿真结果证实：采用的人脸子空间规整化方法优于传统规整化方法（拉普拉斯、全变差）,尤其在低信噪比时可以获得良好的人脸图像SRR效果。     

On the use of nonlinear programming in real time control in process industries

Distributed control systems have opened avenues for incorporating steady state optimization techniques to achieve business objectives in industry. Use of nonlinear programming techniques in plant optimization has been discussed. Status of nonlinear programming software and integration of various software modules for plant optimization have been included. Implementation in power and process industries have been mentioned.     

Fuzzy risk analysis based on similarity measures between interval-valued fuzzy numbers and interval-valued fuzzy number arithmetic operators

In this paper, we present a new method for fuzzy risk analysis based on a new similarity measure between interval-valued fuzzy numbers and new interval-valued fuzzy number arithmetic operators. First, we present a new similarity measure between interval-valued fuzzy numbers. The proposed similarity measure considers the similarity of the gravities on the X-axis between upper fuzzy numbers, the difference of the spreads between upper fuzzy numbers, the heights of the upper fuzzy numbers, the degree of similarity on the X-axis between interval-valued fuzzy numbers, and the gravities on the Y-axis between interval-valued fuzzy numbers. We also present three properties of the proposed similarity measure between interval-valued fuzzy numbers. Then, we present new interval-valued fuzzy number arithmetic operators. Finally, we apply the proposed similarity measure between interval-valued fuzzy numbers and the proposed interval-valued fuzzy number arithmetic operators to propose a fuzzy risk analysis algorithm to deal with fuzzy risk analysis problems. The proposed method provides a useful way for handling fuzzy risk analysis problems based on interval-valued fuzzy numbers.     

Artistic preprocessing for painterly rendering and image stylization

A practical image enhancing technique is presented as a preprocessing step for painterly rendering and image stylization, which transforms the input image mimicking the vision of artists. The new method contains mainly two parts dealing with artistic enhancement and color adjustment, respectively. First, through feature extraction and simplification, an abstract shadow map is constructed for the input image, which is then taken as a guide for emphasizing the light–shadow contrast and the important shadow lines. Next, to simulate the intense color emotion often subjectively added by the artist, a color adjustment technique is proposed to generate lively colors with sharp contrast imitating the artistic vision. The preprocessing operation is compatible with existing stylization and stroke-based painterly rendering techniques, and it can also produce different types of stylization results independently.     

值域增长约束满足问题的无回溯与随机行走策略的算法复杂性分析

值域增长的约束满足问题模型是计算复杂性理论中一类重要的实际问题模型,针对解决这类问题的算法研究仍然很少。通过研究RB模型这一典型的值域增长约束满足问题,发现当问题规模很大时,无回溯策略比随机行走策略更加有效。这与典型的值域确定的约束满足问题如SAT问题不同,是值域增长的约束满足问题所特有的性质。通过实验研究了两种策略的表现,并进一步对两种策略的表现进行了分析。     

基于EL模型的TNPC型APF自抗扰无源控制策略

提出一种基于三电平T型中性点箝位(TNPC)型有源电力滤波器(APF)自抗扰无源控制策略,有效解决了传统TNPC型APF控制策略存在控制性能不佳的问题。建立了TNPC型APF的欧拉-拉格朗日(EL)模型,基于系统的无源性,采用注入阻尼的方法,设计了电流内环的无源控制器,从理论上保证了系统的稳定性。在电压外环使用了自抗扰控制(ADRC)技术,有效提高直流侧电压控制能力,缓解了超调的问题,使系统具有良好的动静态性能,并维持了直流侧电压的稳定。仿真和试验结果验证了所提控制策略的可行性和优越性。     

Chemical thermodynamic representation of very nonstoichiometric phases: 〈Ceo2−x〉

The entire 〈CeO_2−x〉² data base for the dependence of the nonstoichiometry, x, on temperature and chemical potential of oxygen (oxygen potential) was retrieved from the literature and represented by a thermodynamic method. The method resulted in partial molal Gibbs free energy quantities that are useful for any thermodynamic calculation involving 〈CeO_2−x〉. It also accurately represents, for the first time, the complex behavior of the experimental data, including the low-temperature miscibility gap. The method appears to be generally applicable to many very nonstoichiometric phases.