建筑传统与创新问题的重新审视

从传统问题、传统与创新的关系、创新的必要性等层面,对建筑传统与创新问题进行分析,着重从延续性、整体性、新异性三个方面阐释了在尊重传统的基础上进行创新的原则与方法.     

A new plant-wide modelling methodology for WWTPs

This paper presents a new plant-wide modelling methodology for describing the dynamic behaviour of water and sludge lines in WWTPs. The methodology is based on selecting the set of process transformations needed for each specific WWTP to model all unit-process elements in the entire plant. This "transformation-based" approach, in comparison with the conventional "process-based" approach, does not require the development of specific transformers to interface the resulting unit-process models, facilitates the mass and charge continuity throughout the whole plant and is flexible enough to construct models tailored for each plant under study. As an illustrative example, a plant-wide model for a WWTP that includes carbon removal and anaerobic digestion has been constructed, and the main advantages of the proposed methodology for integrated modelling have been demonstrated. As a final consequence, this paper proposes a rewriting of the existing unit-process models according to the new standard transformation-based approach for integrated modelling purposes.     

天线互耦对赋形波束增益的影响和分析

分析了天线单元之间的耦合作用后,运用理论推导得到了天线的散射矩阵.通过遗传算法对线阵天线进行了波束展宽,对阵列进行了互耦分析.分析结果表明:波瓣展宽后天线的旁瓣电平与增益都受到了互耦的影响,主要是由于相位加权破坏相位分布的连续性,导致了能量的利用效率降低,从而导致了天线的增益降低.在波束赋形中,可以加入算法强制相邻通道间的相位分布连续,之后得到的方向图可以适用阵列存在强耦合的情况.     

扩展目标GMPHD滤波器的航迹维持算法

概率假设密度(PHD)滤波器提供了各目标在每个时刻的状态信息,但未形成航迹。该文提出了扩展目标高斯混合PHD(GMPHD)滤波器的航迹维持算法。首先对后验概率强度的每个高斯分量添加标签;其次在后验概率强度随着时间进行演化时,标签也随之演化;并通过航迹管理方案为扩展目标提供航迹。为提高GMPHD滤波器性能,提出了自适应的量测集划分法。最后通过仿真验证了提出算法的有效性。     

Stability Analysis of Laminated Soft Core Sandwich Plates Using Higher Order Zig-Zag Plate Theory

C₀ finite element model based on higher order zig-zag plate theory is used to study the stability analysis of laminated sandwich plates. The in-plane displacement field is obtained by superposing a global cubically varying displacement field on a zig-zag linearly varying displacement field with different slope in each layer. The transverse displacement assumes to have a quadratic variation within the core and constant in the faces. The conditions regarding transverse shear stress at layer interfaces and top and bottom are satisfied. Numerical examples covering different features of laminated sandwich plates are presented to illustrate the accuracy of the model.     

选择性背景优先的显著性检测模型

在检测图像显著性区域的领域中,背景优先是一个较新的思路,但会遇到背景鉴别这个具有挑战性的难题.该文提出背景真实性的判断问题,在探索的过程中发现背景通常具有连续性的特征,根据这一特性实现了判定背景的方法,并将判断的结果作为显著性先验值应用于后继的计算中,最终结果的准确性和正确性得到有效提高.该文首先采用均值漂移(MS)分割算法将图片预分为超像素,计算所有超像素的初始显著值;随后提取原图的4个边界条,计算每两条之间的色彩直方图距离,判定小于预设阈值的两条边界作为“真”的背景,选择它们作为优先边界,计算先验显著性值;最后进行显著性计算,得到最终的显著图.实验结果表明,该算法能够准确检测出显著性区域,与其他6种算法相比具有较大优势.     

分散染料自动连续化生产新工艺

为提高分散染料生产的自动化水平,从重氮化反应过程和偶合反应过程2个方面研究了分散染料自动连续化生产的新工艺。与传统间歇式生产相比,采用自动连续化新工艺生产的分散紫93∶1和分散蓝291∶3,其液相色谱(HPLC)纯度分别提升1.16%、0.87%,染料收率分别提高2.06%、2.07%,染料的高温分散稳定性过滤时间均为A级,新工艺生产的分散紫93∶1的残余物等级为4级,高于传统间歇工艺生产分散紫93∶1的3~4级,涤纶染色织物的色光和各项染色牢度等测试结果相近。自动连续化生产新工艺的应用,使得染料滤饼母液水的量减少20%以上,提高了水的重复利用率,避免了传统间歇式生产中各种问题的出现,稳定了染料生产的产品质量,同时,提高了企业的环保效益和经济效益。     

皮带出岩在下山大断面巷道施工中的应用

阐述下山大断面巷道施工时采用皮带出岩施工工艺的优点、可操作性以及经济效益,为实现快速掘进施工下山巷道开辟了新的途径。