Reconfigurable topology synthesis for application-specific NoC on partially dynamically reconfigurable systems

In this paper, a four-stage method for synthesizing reconfigurable ASNoC topology is proposed for partially dynamically reconfigurable systems, where the topology is reconfigured dynamically at run-time along with the application's execution. Firstly, a simulated annealing based topology-aware integrated optimization framework is proposed to generate the proper schedule and floorplan of task modules. Secondly, based on the schedule and floorplan of task modules, an Integer Linear Programming (ILP)-based method and a heuristic method, are proposed to partition the communication requirements of the application into $T$ time intervals. Thirdly, we explore the proper positions of switches in the floorplan for global communications. Finally, considering the reconfiguration costs between adjacent time intervals, the routing path allocation problem is solved for time intervals in an iterative procedure to generate fine-grained dynamically reconfigurable ASNoC topologies. Experimental results show that, compared to the random partition of communication requirements, the proposed heuristic method and ILP-based method can achieve 5.4% and 10.0% power consumption improvement, respectively. And, the reconfigurable ASNoC can achieve 31.6% power consumption improvement when compared with static ASNoC.     

交通建设监理行业管理信息系统的设计与实现

为适应交通建设规模不断扩大的现状,提出了一种基于B/S结构的监理行业管理系统,以加强交通建设监理行业管理.分析了行政区划与机构设置、多部门协作流程、分级业务管理等关键问题,设计了基于管辖区域编码和专业关联算法的机构设置模型,通过多维度的继承式权限管理,完成了多机构多层次的权限配置.在此基础上,实现了可动态装载的流程设计.同时,通过操作痕迹和业务痕迹,对数据建立了全程追溯管理.结合实例对模型和算法进行了试验,实验结果表明了系统设计的有效性.     

Ti-6Al-4V合金的动态控制等离子焊接(英文)

介绍了一种新的动态控制等离子焊接工艺。该工艺能够在保持完全焊透的情况下减少对被焊材料的热输入。利用该工艺对Ti-6Al-4V合金实施平板对焊。利用光学显微镜、扫描电镜(SEM)和显微硬度计对焊接接头的显微组织、断口形貌和显微硬度进行表征。与钨极电弧焊接和常规的等离子焊接相比较,使用本工艺提高了焊接质量,其原因在于:1)由于热输入的减少,焊缝中先析出的β相晶粒大幅度减少,从而使马氏体的形成得到抑制;2)焊接接头具有更好的韧性和更高的硬度。     

Effect of repetitive processing on the mechanical properties and fracture toughness of dynamically vulcanized iPP/EPDM blends

The effect of repetitive processing on the mechanical properties and fracture toughness of dynamically vulcanized isotactic polypropylene/ethylene‐propylene‐diene rubber blends (TPVs) with and without addition of β‐nucleating agent (β‐NA) was studied. The results showed that the repetitive processing did not cause much loss in the mechanical properties of TPVs, especially for TPVs with β‐NA, and TPVs with β‐NA showed better performance stability than TPVs without β‐NA. Essential work of fracture (EWF) approach was used to study the fracture behavior, and the results showed that the value of w_e (the specific essential work of fracture) of TPVs without β‐NA showed a significant decrease while that of TPVs with β‐NA almost kept constant after repetitive processing. Differential scanning calorimetry and wide‐angle X‐ray diffraction were used to study the variation of crystalline structures, and the results indicated that the repetitive processing showed no significant influence on the crystalline structures of TPVs, and the β‐NA maintained high‐nucleating efficiency after repetitive processing. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Treatment of olive mill washing water by ultrafiltration

Olive oil production requires important quantities of washing water containing low oil concentrations, but classical processes used to recover or to eliminate this oil are ineffective. This study presents a membrane technique to treat olive oil mill washing water using different commercial ultrafiltration membranes: one organic (PCI) and two ceramic (Ceraver) membranes. The influence of the hydrodynamic parameters (transmembrane pressure and flow rate) and the cut‐off membranes on the efficiency of the ultrafiltration process was evaluated, and it was shown the organic PCI membrane could reduce pollution due to organic matter by decreasing the value of the Chemical oxygen demand by about 90%. Moreover, the nature of the ultrafine pore membrane appeared to be an important parameter which may strongly increase or decrease the capacity of the membrane. The membrane cut‐off did not have a strong influence on the performance of the process but if the membrane pores were too large the stability of the dynamically formed membrane decreased at transmembrane pressures greater than 0.2 MPa.     

Linux内核函数调用关系的验证方法

作为最流行的开源操作系统,Linux在各行各业得到了广泛的应用。因此了解Linux内核的架构及工作机制就显得非常重要。然而目前对Linux内核的主要学习途径是各种教科书以及经验博客,而对于Linux内核的实时动态监控技术却很少有人了解。本文提供一种动态监视内核运行过程的方法。通过此方法可以动态地观察Linux内核的函数调用情况,以及CPU寄存器值等动态信息。     

程序断言动态检测工具的设计与实现*

重点研究了断言的动态检测方法与检测过程,并在关系数据库理论的基础上实现了交互式的断言动态检测工具,即TDDPA。该工具具有动态检测程序断言等功能,并通过将运行轨迹收集到数据库中来实现检测到的各种断言形式分析,说明了TDDPA总体设计结构及实现过程。结果证明TDDPA能更方便有效地发现程序中所蕴涵的断言。     

突发事件应急管理调度平台的设计

为提高企业、政府机构、高校等应对突发事件的反应速度和指挥效率,设计并实现了基于Spring框架和Hibernate数据持久化框架的突发事件应急管理调度平台。该平台完成了对不同机构、不同区域、不同类型的突发事件应急过程的全面管理和统一监控;通过热点地图的形式,实现对电子维运管理调度平台上报的重要应急数据在电子地图上的统一呈现;通过电子地图、卫星地图等直观的方式实现对应急资源调度过程的动态监控。实验证明,平台能够准确地呈现实时应急调度数据的变化,可提高突发事件的应急管理调度效率。     

凿岩机液压系统动力耦合研究

根据系统状态方程和受力平衡方程等 ,利用液压系统中管路及流体、各功能元件、机械振动之间相互影响而产生的耦合现象 ,针对矿用凿岩机设计了一套液压振动系统。对液压振动系统进行了动态分析研究 ,建立了由液压系统内主要有振动开关阀和溢流阀相互耦合而产生的液体压力p变化的数学模型 ,并对系统工作时液体的动态特性进行了仿真研究和分析     

条纹周期动态可调的通用型干涉仪

提出一种新型结构的通用型干涉仪,用于实现不同结构、不同形状的光学透镜、光学晶体等元件的快速目视观察与精确测量。该干涉仪利用可相对旋转的双光楔对条纹周期进行动态调制完成实时检测。以两块雅敏干涉平板为主体结构,在双光路中各自放入一对楔角完全相同的光楔对,建立条纹周期和条纹倾斜方向与光楔对相对旋转角度之间的关系,并采用光学晶体畴反转实时检测验证干涉仪的测量性能。试验结果表明,干涉仪的相位检测精度约为0.2 rad(λ/30),条纹周期(一对黑白条纹)为0.105~5.993 mm/pair,光路中光楔对的相对转角可在0~179°调节。干涉仪具有完全对称的光路结构,由于较高的稳定性和抗干扰能力,可针对不同类型光学元件的结构特点进行条纹周期的实时调制,并可达到较高的检测精度。