Eckert填料层压降通用关联图的关联与应用

对Eckert的通用关联图进行了回归 ,得到了分段的关联式 ,计算的最大误差为 18.5 % ,平均误差为 4.96 % ,可以满足工程设计计算的要求。该关联式用于真空精馏塔的计算 ,得到了满意的结果。同时还对三条泛点线进行了关联。     

粘度对规整填料层泛点影响的研究

研究了粘度对规整填料层泛点的影响 ,对文献上规整填料层泛点的关联式进行了改进 ,利用新关联式可由空气 水物系的泛点实验数据计算其他物系的泛点空塔气速 ,新关联方法与实验数据吻合较好 ,计算准确性优于文献公式     

基于分割模板运动预估的相关跟踪算法

为了对常规相关匹配算法实时性能进行提升，提出一种基于分割模板运动预估的相关跟踪算法。采用最小二乘法全区间等距拟合目标运动轨迹，计算出目标当前预估点；将模板图像按块运动估计算法要求分割成宏块；按菱形搜索法在预估点周围区域进行搜索，得到每个宏块的最佳运动矢量；取匹配度最佳的运动矢量对应点为模板的粗匹配点；判断该点所在宏块与搜索区域相对位置关系，决定是否进行精匹配结束搜索，或是按梯度方向建立新的搜索区域。目标跟踪实验证明，该方法比基于全搜索的归一化积相关( NProd)算法其计算时间缩短到3.31倍。     

一种考虑时间关联约束的安全经济调度解法

针对有时间关联约束的一类安全经济调度问题，以机组输出功率速率约束为例，建立Dantzig-Wolfe分解的主从优化问题及其迭代机制来求解。主问题是仅计及时间关联约束的优化问题，从问题是按研究期间所划分时段数构成若干静态子优化问题。主问题在由从问题确定的解空间内寻优;从问题依据主问题解所对应的拉格朗日乘子来修正其目标，以间接松弛时间关联约束。在给出主从问题交替求解收敛条件及其论证基础上，提出了详细的计算方法和特殊问题的处理手段。5机系统、IEEE 24节点系统和IEEE 118节点系统的计算和分析表明，文中方法能有效解决带有时间关联约束的一类安全经济调度问题，具有对大规模系统实际应用的前景。     

受扩建工程影响的老垃圾填埋场沉降分析

以苏州七子山垃圾填埋场扩建工程为例，利用数值模拟和分层总和沉降法分析老场垃圾堆体在新填埋堆体作用下的“二次沉降”规律。结合老场垃圾土的现场试验数据，利用有限差分软件FLAC3D对堆载过程中老场垃圾土的沉降进行了模拟。结果表明，在新场封场时，老场沉降呈“穹隆”状；最大沉降发生在中间部位，最大沉降量约为老场堆体厚度的20%左右。数值分析计算结果约为分层总和法计算结果的1.2倍。     

Kernel propagation strategy: A novel out-of-sample propagation projection for subspace learning

Kernel matrix optimization (KMO) aims at learning appropriate kernel matrices by solving a certain optimization problem rather than using empirical kernel functions. Since KMO is difficult to compute out-of-sample projections for kernel subspace learning, we propose a kernel propagation strategy (KPS) based on data distribution similar principle to effectively extract out-of-sample low-dimensional features for subspace learning with KMO. With KPS, we further present an example algorithm, i.e., kernel propagation canonical correlation analysis (KPCCA), which naturally fuses semi-supervised kernel matrix learning and canonical correlation analysis by means of kernel propagation projections. In KPCCA, the extracted correlation features of out-of-sample data not only incorporate integral data distribution information but also supervised information. Extensive experimental results have demonstrated the superior performance of our proposed method.     

MODELING SIMULATION AND CONTROL OF THE WOOD DRYING PROCESS Part 3. Programming and Computer Solutions

Abstract

In this paper, the programming and computer subroutines of wood drying process (WDP) are studied. This WDP is represented by the set of non-linear partial differential equations which are decomposed into fast and slow subsystems. Moreover, a few procedures have been used to estimate piecewise linear parameters and to reconstruct the real parameter distributions along the drying kiln. Several aspects including estimating stepsize, tuning sensitivity of the operating functions, and general solutions of the internal model (M) are discussed and illustrated     

Identification of task model using piecewise affine systems with variable switching points and its application

This paper considers a human‐operated task model based on identification techniques using switched systems expressed by mixed logical dynamical systems. In the system, each subsystem is expressed by a piecewise affine system. For a model to be identified, it is not easy to determine a number of subsystems in advance. In this paper, we propose a simultaneous identification technique which takes into account both a number of subsystems and parameters, so that a piecewise affine model of a human operation can be obtained. In addition, the obtained model is applied to automation. The effectiveness of the proposed method is illustrated by simulations and experiments. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 176(1): 46–54, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21079     

Mass transport studies at rotating cylinder electrode (RCE): Influence of using plates and concentric cylinder as counter electrodes

This study shows the effect of using four-plate, six-plate and concentric cylinder as counter electrodes on the RCE mass transport characterization. The Cu(II)/Cu(0) process in sulfuric acid is employed as the model reaction. Based on the analysis of Sh = aRe^bSc^0.356 correlation, the values of the constant a, associated with shape and cell dimensions, were 0.012, 0.014, and 0.022 for the four-plate, six-plate and concentric cylinder, respectively. This behavior suggests that both, the shape and area of the counter electrode, influence the values of a. The values of b, associated with the hydrodynamic regime, were similar for the six-plate and the concentric counter electrodes, b = 0.91; whereas for the four-plate counter electrode, b = 0.95. The fact that the four-plate device gives greater values of b suggests that this device has a higher turbulence-promoting action than the others. The mass transport at the RCE with four plates has a performance similar to the concentric counter electrode, which is important from the technical and economics standpoints.