准确把握高校形势与政策教育教学要点

形势与政策课是对大学生进行形势与政策教育的主渠道、主阵地,是高校思想政治课的重要组成部分。由于该课程一直缺乏明确的教学大纲和全国统编教材,各高校确定教学任务的根本依据就是教育部每学期下发的的高校形势与政策教育教学要点。尽管该要点的权威性与重要性不容质疑,但其局限性也显而易见,需要各高校准确领会教育部相关文件及教学要点精神实质,结合自身实际积极创新,制定出切实可行的实施方案。     

Dominant pole placement with fractional order PID controllers: D-decomposition approach

Dominant pole placement is a useful technique designed to deal with the problem of controlling a high order or time-delay systems with low order controller such as the PID controller. This paper tries to solve this problem by using D-decomposition method. Straightforward analytic procedure makes this method extremely powerful and easy to apply. This technique is applicable to a wide range of transfer functions: with or without time-delay, rational and non-rational ones, and those describing distributed parameter systems. In order to control as many different processes as possible, a fractional order PID controller is introduced, as a generalization of classical PID controller. As a consequence, it provides additional parameters for better adjusting system performances. The design method presented in this paper tunes the parameters of PID and fractional PID controller in order to obtain good load disturbance response with a constraint on the maximum sensitivity and sensitivity to noise measurement. Good set point response is also one of the design goals of this technique. Numerous examples taken from the process industry are given, and D-decomposition approach is compared with other PID optimization methods to show its effectiveness.     

居的背后——民居,新民居之文化刍议

文章从文化视角审视民居的诸多传统和当代矛盾，阐述对“建筑稗史”的文化思考。     

从点到点--上海民间自发的旧建筑改造与利用

文章通过对从点到点——上海民间自发的旧建筑改造与利用实例的分析,说明这是旧建筑改造利用的重要方式,应引起足够的重视和关注,同时指出政府在旧建筑改造利用中的角色定位。     

采空区应力变化监测及稳定性分析

采用光弹性应力计对某金矿采空区应力变化情况进行了长期监测，应用模糊C均值聚类算法对监测结果进行了聚类分析，据此，划分了采空区稳定性等级，并对维护采空区稳定性的关键矿柱作了较详细的讨论 ，得出的结论在工程实践中得到了验证。     

移动对象轨迹时空相似性度量方法

在分析移动对象行为时,移动对象轨迹因包含大量的信息而具有重要的作用。在实际应用中移动对象常受限于空间网络而无法利用现有欧氏空间中轨迹及其距离处理技术。分析了道路网络空间轨迹相似性性质,提出一种移动对象轨迹建模的时空表示方法,能有效地将轨迹从道路网络空间转化到欧氏空间;同时提出了一种基于兴趣点POI（Points Of Interesting）距离的轨迹间相似性测量方法,有效地对轨迹进行化简并减少轨迹中节点的数目,从而降低算法时间复杂度。该方法不仅可以用于搜索相似轨迹,还可方便地应用到轨迹聚类的相关工作中。     

Input-output table of electricity demand and its application

It is very important for electric utility to determine dominant sectors which have more impacts on electricity consumption in national economy system. In this paper, an input-output perspective and methodology is proposed to handle this issue. The input-output table of electricity demand (IOTED) is put forward based on the input-output table of national economy (IOTNE). The relevancy of electricity demand in various sectors is revealed by means of electricity consumption chains (ECCs), which are key components in the IOTED. Besides, a new concept, electricity demand multiplier (EDM), is presented to identify dominant sectors imposing great impacts on electricity demand quantitatively. In order to testify the effectiveness of the proposed methodology, a case based on provincial economy system in China is studied. Dominant sectors are identified and discussed.     

Dominant frequency of pressure drop signal as a novel diagnostic tool for the water removal in proton exchange membrane fuel cell flow channel

In this work, a transparent assembly was self-designed and manufactured to perform ex situ experimental study on the liquid water removal characteristics in PEM fuel cell parallel flow channels. It was found that the dominant frequency of the pressure drop across the flow channels may be utilized as an effective diagnostic tool for water removal. Peaks higher than 1 Hz in dominant frequency profile indicated water droplet removals at the outlet, whereas relatively lower peaks (between 0.3 and 0.8 Hz) corresponded to water stream removals. The pressure drop signal, although correlated with the water removal at the outlet, was readily influenced by the two phase flow transport in channel, particularly at high air flow rates. The real-time visualization images were presented to show a typical water droplet removal process. The findings suggest that dominant frequency of pressure drop signal may substitute pressure drop as a more effective and reliable diagnostic tool for water removal in PEM fuel cell flow channels.     

改进的OPTICS算法在调制识别中的应用

提出了一种基于星座聚类的调制识别新方法。该算法利用改进的OPTICS算法能准确发现数据集分布的特性,不仅克服了模糊C-均值聚类算法对初始聚类中心、样本输入次序敏感等不足,而且能够同时发现不同密度的聚类,结合聚类有效性分析实现了聚类中心目的自适应调整,同基于DBSCAN的聚类算法相比,降低了时间复杂度。将该算法用于对MPSK/MAPSK信号星座重构和识别,实验结果表明该方法是实际有效的。     

一种基于局部描述符的三维人脸识别方法

提出一种局部描述符进行三维人脸识别。每个采样点的局部特征定义为该点根据其法向量与3个主轴之间的角度自适应选取的邻域点集向人脸主轴平面投影所得的面积。文中提出的三维人脸识别算法首先对人脸进行预处理,归一化到较统一的姿态后,提取与鼻尖等距的轮廓线,并对轮廓线进行重采样以剔除无用点。然后对每个采样点提取局部特征。最后建立人脸之间的点对应关系,将加权融合后的局部特征用于识别。通过实验认证,文中方法识别效果较好,且对遮挡和噪声有较好的鲁棒性。