Seismic displacements of landfills and deformation of geosynthetics due to base sliding

Seismic design of waste landfills has been a subject of intense research over the past two decades, primarily due to the severe environmental impact of a potential failure. The majority of the related studies have been focused on the stability assessment of landfills utilizing permanent deformation methods. However, previous investigations have not fully addressed the impact of the composite liner system on the seismic performance of the geostructure, mainly expressed as potential sliding development, which is greatly affected by the geometry and the resulting initial static stress state of the landfill. Therefore, the aforementioned issues are investigated via a detailed parametric study, where the dynamic behaviour of the composite liner system is examined both analytically and numerically. The conducted coupled analyses indicated that the most significant parameters of the complex dynamic response of waste landfills can be reduced in two ratios that comprise functions of the main characteristics of the geostructure and of the excitation. Moreover, two distinct failure patterns have been identified with respect to the characteristics of the distribution of the permanent displacements along the interface and the axial deformation along the geosynthetic. The occurrence conditions of these failure patterns can be determined in terms of the two abovementioned ratios as verified by the analytical results of the critical acceleration of a simple SDOF system.     

纯棉织物低甲醛耐久阻燃整理工艺研究

采用多元酸作为交联剂对棉织物进行低甲醛耐久阻燃整理，研究低甲醛耐久阻燃整理工艺条件，探讨影响阻燃效果的各种因素。与N—羟甲基酰胺类交联剂工艺进行比较，本工艺不仅显著降低织物中游离甲醛含量，还提高了阻燃效果，且阻燃剂、交联剂的用量大大减少，阻燃成本降低。     

小型永磁同步风力发电机电磁设计及仿真

介绍了小型风力发电系统总体结构和工作原理,列举了3k W永磁同步风力发电机的主要技术参数。并对发电机的空载特性、负载特性进行了仿真计算分析,尤其是对定子是否采用斜槽时发电机的空载特性进行了对比仿真分析。     

高速高功率密度永磁同步伺服电机设计

根据某航天项目机电伺服系统的要求,提出了一种500W高速、高功率密度的永磁同步伺服电机技术方案,开展了详细设计和样机生产试验。通过对电机磁路优化设计和热分析,使产品能够在高温环境下可靠工作。设计计算结果与实测值吻合良好,满足设计和伺服系统的使用要求。     

永磁调速驱动设备在炼钢冷却水循环系统上的应用

本文详细介绍了永磁调速驱动设备在炼钢冷却水循环系统上的应用。从Concept程序设计与Citect上位画面控制两个方面进行了详细阐述,在程序设计方面引入PID控制,保证了永磁调速驱动设备对炼钢冷却水液位及流量的有效控制。系统运行以来,收到了良好的效果。     

真丝绸环氧树脂EPTAII“洗可穿”整理

本文介绍了真丝绸环氧化合物“洗可穿”整理的方法，分析了影响整理效果的因素，讨论了整理后织物的物理性能的变化。真丝电力编织自制环氧树脂ＥＰＴＡＩＩ整理后，湿弹性显著提高，而综合手感与未整理原样相近，具有良好的耐洗性。     

变流器输出端RLC-plus-C新型过电压滤波器研究

为进一步抑制永磁风电机组变流器PWM高频脉冲波经长电缆传输反射造成机侧过电压,并降低电机轴承电流,基于共模电流衰减法,提出一种新型RLC-plus-C无源滤波器及其设计方法。首先建立长电缆传输等效电路模型,分析过电压产生机理,引入传递函数,优化滤波器参数。其次对新型滤波器的参数Rf、Cc和Cf进行设计,在此基础上,针对电感Lf的值在Matlab中设计一套完整的计算方法。最后通过Matlab/simulink软件搭建含PWM变流器-长电缆-发电机的仿真模型,引入新型滤波器,分析其过电压抑制效果,轴承电流衰减量以及功率损耗,与RLC和RL-C滤波器比较。结果表明：RLC-plus-C滤波器进一步抑制了机端过电压,同时显著的降低了轴承电流。     

The limits to shaping diversity as public culture: Permanent festivities in Barcelona

In spite of the existence of an extensive debate on cultural policies on the one hand, and on local diversity policies on the other hand, there are still few studies dealing directly with this nexus. This emerging research trend will be discussed in the context of Barcelona and through the analysis of a specific cultural policy field: the planning of permanent festivities.After overviewing its migration history and after presenting the theoretical framework and methodology, this article frames Barcelona’s general cultural policy and intercultural policy patterns, arguing that the Catalan capital is really at a very initial stage of connecting diversity with cultural policy. After that, I will defend the argument that, in spite of recognising diversity, the analysis of Barcelona’s permanent festivities shows that there are also some limits to the development of this connection, due primarily to a lack of democratization of culture. Interviews and a discussion group confirm this empirical diagnosis. The argument I want to put forward is that this lack of participation of immigrants in cultural planning and diversity promotion is probably due to the fact that the two departments in the city represent, indeed, two approaches toward the question of how to promote the nexus between culture and diversity, and thus they are still working separately. The department of culture still has an elitist focus, centred on a culture of excellence, while the immigration department has a more social focus on cultural diversity.     

Modelling and study of PM machines with inter-turn fault dynamic model-FEM model

In this paper, a simple dynamic model for a PMSM with inter-turn winding fault is derived. Finite element method is used for parameter determination of machine with fault. This dynamic fault model is used to study the PM machine behaviour under various inter-turn fault conditions. A 2D time stepping finite element method (FEM) model is carried out to validate the dynamic fault model. The dynamic model results exhibit the same trend as predicted by FEM analysis for different fault insulation resistances. An experimental test is also conducted to verify the fault model. This model is used to study the machine behaviour under various fault conditions and severity. The proposed model seems to be well adapted for PM motors health monitoring and inter-turn fault diagnosis.     

IP DSLAM与ATM DSLAM技术比较

介绍了IP DSLAM和ATM DSLAM技术的基本原理，从原理、组网、服务质量、安全性、接人能力等几方面进行了分析与比较。