Multilevel adaptive control of nonlinear interconnected systems

This paper presents an adaptive backstepping-based multilevel approach for the first time to control nonlinear interconnected systems with unknown parameters. The system consists of a nonlinear controller at the first level to neutralize the interaction terms, and some adaptive controllers at the second level, in which the gains are optimally tuned using genetic algorithm. The presented scheme can be used in systems with strong couplings where completely ignoring the interactions leads to problems in performance or stability. In order to test the suitability of the method, two case studies are provided: the uncertain double and triple coupled inverted pendulums connected by springs with unknown parameters. The simulation results show that the method is capable of controlling the system effectively, in both regulation and tracking tasks.     

Data-oriented multi-index Hashing

The multi-index hashing (MIH) is the state-of-the-art method for indexing binary codes. However, it is based on the dataset codes uniform distribution assumption, and will lower efficiency in dealing with non-uniformly distributed codes. In this paper, we propose a data-oriented multi-index hashing method. We first compute the correlations between bits and learn adaptive projection vector for each binary substring. Then, instead of using substrings as direct indices into hash tables, we project them with corresponding projection vectors to generate new indices. With adaptive projection, the indices in each hash table are nearly uniformly distributed. Besides, we put forward an entropy based measurement to evaluate the distribution of data items in each hash table. Experiments conducted on reference large scale datasets show that compared to the MIH the time performance of our method can be 36.9％～87.4％ better .     

深井软岩巷道围岩控制技术研究

深井软岩巷道支护是目前矿压界的支护难题之一。依据现场工程实践,通过设计合理有效的支护方案且对巷道支护参数进行优化。采用以注浆锚杆与注浆锚索为主的锚注联合支护巷道两帮,并施加以底板反底拱,及时监测矿压变化规律。结果表明,注浆锚杆与锚索在深井软岩巷道围岩控制中可以起到良好的效果,巷道反底拱能够有效控制深井巷道底鼓。     

慈溪市区域排水系统技术方案分析

为解决慈溪市域范围1市17镇的污水出路问题,在慈溪市污水治理一期工程中拟采用区域排水系统方式.通过对区域排水系统的总体布置、二级处理和深度处理的技术经济分析,最终确定区域排水系统采用三大污水收集系统、三座污水处理厂、分点进水倒置A/A/O脱氮除磷工艺以及人工湿地深度处理工艺的方案.     

浅析倒置式屋面设计中的几个问题

就倒置式屋面在构造设计中普遍存在的一些问题，从压置层的设计、排水设计、防水层设计、保温层设计等方面作了探讨，以利倒置式屋面在工程中的广泛应用。     

倒置式屋面新型隔热防水技术

结合倒置式施工特点 ,介绍了一种利用自行研制的防水隔热块和设置预防水层进行建筑屋面的新型隔热防水工程施工方法。该技术不仅保障了屋面具有优良的保温隔热功能 ,而且隔热块本身的自防水性和设置的预防水层构成复合防水能有效地保证屋面的抗渗漏性 ,有很好的市场推广应用价值和开发前景。     

一种公路路堤施工方法探讨

结合工程实例，对填石路堤的施工工艺进行了介绍，并对浸水路堤路基横断面，反滤层及塑料土工格栅，路基坡面地表处理等填石路堤施工中的一些问题进行了阐述，以提高路基压实度，保证了路面的正常使用。     

XPS在倒置式保温屋面中的应用

本文通过阐述XPS的优异性能,论述了XPS在保温屋面中的作用,XPS倒置式保温屋面的优越性,施工方法以及质量保证措施,以期对XPS在倒置式保温屋面中的应用提供有益的帮助。     

倒置式屋面作法简析及施工技术要点

以传统屋面作法存在的不足为基础，分析介绍了倒置式屋面作法存在的优点及缺点，以充分发挥倒置式屋面的整体功效为出发点，介绍了倒置式屋面各施工工序以及面层施工的技术要点及注意事项。     

唐河倒虹吸管身段施工中的关键技术

介绍唐河倒虹吸管身混凝土施工过程中的模板技术、钢筋连接新技术、止水带安装、施工缝留置及混凝土浇筑方法。