捣固焦炉大型化与SCP机国产化探讨

分析了捣固焦炉大型化的优点,介绍了捣固、装煤、推焦机械的主要形式.阐述了6.25m捣固焦炉捣固、装煤、推焦机械国产化的必要性,对其工艺配置及投资情况与引进技术进行了比较,提出了捣固焦炉大型化和SCP机国产化的具体建议.     

MST-based topology control with NLOS location error compensation for location-aware networks

The topology control algorithms can improve the network capacity and network lifetime in location-aware networks. The topology control algorithms require accurate locations of mobile nodes or distances between each of the mobile nodes. The IEEE 802.15.4a-based location-aware networks can provide precise ranging distance between two mobile nodes. The mobile nodes can obtain their accurate locations by using accurate ranging distances. However, in the IEEE 802.15.4a networks, the ranging distance has a large measurement error in non-line-of-sight (NLOS) conditions. In this paper, we propose MST-based topology control with NLOS location error compensation algorithm to improve location accuracy and prevent mobile nodes from connecting to unstable links in NLOS condition. Performance evaluation shows the proposed algorithm constructs a topology map which has low location errors with considering the instability of NLOS links in NLOS condition.     

Framework for distributed autonomic self‐healing in fixed IPv6 networks

A main requirement for the Future Internet is to enable self‐management behaviors facilitating the network to adapt to changing conditions and self‐heal in the face of erroneous states. On the basis of Autonomic Fault‐Management principles, this paper proposes a framework consisting of a set of components operating inside the network elements and allowing the devices to collaboratively realize self‐healing. In that context, Autonomic Fault‐Management is intuitively constituted by the detection of the presence of faulty conditions, followed in turn by the self‐diagnosis and identification of the corresponding root causes, and completed consequently by the removal of the identified root causes and their effects. The proposed framework implements a distributed control loop that interacts with the network operations personnel in case the current erroneous state is not resolvable by means of Autonomic Fault‐Management. We argue that there are a number of mutual benefits between our proposed framework and the IPv6 protocol suite. This is demonstrated by a case study that illustrates these benefits and shows how the capabilities of IPv6 can be enhanced through the self‐healing mechanisms of the proposed framework. Finally, the prototype implementation used for the case study is analyzed in terms of scalability and overhead produced in the network nodes. Copyright © 2013 John Wiley & Sons, Ltd.     

B超定位体外震波碎石(ESWL)治疗输尿管中段结石176例分析

目的:观察B超定位行ESWL对输尿管中段结石的治疗效果及分析其技术特点。方法:对176例输尿管中段结石采用ESWL治疗进行回顾性分析。结果:176例输尿管中段结石,治愈率达到95.5%。结论:B超定位行ESWL是治疗输尿管中段结石最简便、最快捷、痛苦最少的一种有效治疗方法。     

Distributed and resilient localization algorithm for Swarm Robotic Systems

Many applications of Swarm Robotic Systems (SRSs) require each robot to be able to discover its own position. To provide such capability, some localization methods have been proposed, in which the positions of the robots are estimated based on a set of reference nodes in the swarm. In this paper, a distributed and resilient localization algorithm is proposed based on the BSA–MMA algorithm, which uses the Backtracking Search Algorithm (BSA) and the Min–Max Area (MMA) confidence factor. It is designed in a novel four-stage approach, where a new method, called Multi-hop Collaborative Min–Max Localization (MCMM), is included to improve the resilience in case of failures during the recognition of the reference nodes. The results, obtained with real Kilobot robots, show 28–36% of performance improvement obtained by the MCMM. Also, it is shown that the final result of the localization process is better when the MCMM is executed than if it is not executed. The experiments outcomes demonstrate that the novel four-stage approach and the use of the MCMM algorithm represents a progress in the design of distributed localization algorithms for SRS, especially with regard to its resilience.     

Membrane Effects in Biaxial Compression Tests

The effects of the confining membrane in laboratory tests on soil specimens have been the subject of numerous experimental, analytical, and numerical studies over the past half-century. This technical note expands the existing knowledge base by presenting a methodology and the associated results from an experimental study that has quantified the effect of the confining membrane in biaxial shear tests conducted on medium sand. The applicability of the method of biaxial tests on clay specimens is also presented. The results show that for both tests on sands and clays, the effect of the membrane on the shear stress on the failure plane are significant and should be accounted for in the interpretation of biaxial shear test results where localization occurs.     

全球地方化的论述与实践——从台北社区规划师制度谈起

全球化的影响力无远弗届,战后台湾的发展作为被支配的依赖关系的一种典型,移植与认同一直是整个台湾社会的重要课题，对主流文化价值的亦步亦趋,反应在建筑形式的探索上,从现代到后现代乃至解构与极简，本质上仍然只是形式上的移植与转化,反映了殖民母国的文化支配，而另一个系统,来自台湾内在主体意识的觉醒,对于地方主体性的建构,在后现代建筑理论的脉络中,通过建筑实践慢慢形成,而这也是面对这一波全球化冲击的有力回应，这样的取向不只是反映在建筑形式之上,更有意义的是在制度的改变与营建的过程中,积极而直接透过民众参与的民主化程序，以具体的“地方化”面对日益艰难的环境议题。     

基于波束成型的Lamb波无基线损伤识别技术研究

本文提出了一种基于波束成型的Lamb波无基线损伤识别方法,该方法利用激励-回波模式的分布式传感网络与时间窗函数进行损伤信号的提取,然后利用波束成型算法对结构进行损伤定位与成像。分别采用数值模拟和实验对该方法进行验证,结果证明所提出的方法能够有效地识别损伤     

Multiple scale meshfree methods for damage fracture and localization

The Reproducing Kernel Particle Method (RKPM), which utilizes the fundamental notions of the convolution theorem, multiresolution analysis and meshfree properties, is reviewed. The multiple-scale RKPMs are then proposed as an alternative to commonly used numerical methods such as the finite element method. The elimination of a mesh, combined with the filtering properties of window functions, makes a particle method suitable for problems with large deformations, high gradients, and localization problems. This class of methods has been applied to shear band problems, and large deformation fracture and damage problems.     

无料钟炉顶的发展及秦冶炉顶设备的应用特点

无料钟料顶因其优越性在炼铁高炉中得到广泛应用，然而半世纪以来PW公司的无料钟炉顶设备始终垄断着世界炼铁高炉炉顶设备市场。为打破国外对无料钟炉顶工艺技术及设备的专利垄断和封锁，北京科技大学严允进教授自1975年开始研究无料钟炉顶设备，并完成中国第一套无料钟炉顶设备的试验研发和工业设计，后研发“水冷水封型”无料钟炉顶并达到国际先进水平。同期,僧全松教授团队研发的“僧氏”无料钟炉顶也应用于国内中小高炉。实现国产无料钟炉顶设备应用于大型高炉的突破是秦冶研发的BF T（BCQS）新型设备，该设备应用于浦项、越南和静及宝钢湛钢大型高炉，由此代表具有中国自主知识产权的无料钟炉顶走向世界。