基于地址-事件表示的高速二值连通域标记方法

为提高二值连通域标记的速度,将地址-事件表示AER（Address Event Representation）思想引入到二值图像处理,提出了一种基于事件对等价标号的二值连通域标记方法。该算法无需多次遍历图像中的背景点和冗余目标点,首先将待标记的连通域以AER“事件对”的方式编码保存,通过“事件对”的遍历生成临时标号和等价标记表;然后根据等价表修改临时标号;完成标号映射后最终实现连通域标记。整个算法只处理极低冗余的事件信息,避免了对全图像素的重复扫描与处理。实验结果表明,图像以AER“事件对”方式存储,数据量仅为全帧图像的10%~35%,有较高的压缩比;且该算法速度快,可达到了传统基于等价标号算法的1.5~8倍。     

一个基于模拟退火的多主体模型及其应用

近些年,多主体系统的理论及应用得到了人们的广泛关注,并得以迅速发展.研究者提出了很多基于多主体系统理论的模型,用于求解各种问题.AER(Agent-environment-rules)模型正是一个用于求解约束满足问题较为成功的例子.但是,主体的静态策略选择在一定程度上限制了模型的求解性能.将模拟退火算法与多主体系统思想相结合,并赋予主体更为高效的动态策略选择的能力,提出了SAAER模型(simulated annealing based AER model).基于约束满足问题经典实例--N-Queen问题和染色问题的实验表明,改进后的模型较之原模型获得了更高的效率和稳定性.对于N=10000的大规模N-Queen问题,能在200s左右的时间求得精确解.     

一种错误敏感的词对齐评价方法

对齐错误率(Alignment Error Rate,AER)是目前通用的词对齐评价标准。近年来的研究表明,AER虽然在一定程度上能够反映词对齐的质量,但它与机器翻译最终结果BLEU得分的相关性并不好。该文针对基于短语的机器翻译系统(PBSMT)分析了AER可能存在的一些问题,并根据词对齐结果中存在的不同类型的错误,提出了一种错误敏感的词对齐评测方法ESAER(Error-Sensitive Alignment Error Rate)。实验表明,该文提出的ESAER与BLEU的相关性要远远好于AER。     

Inter-spike-intervals analysis of AER Poisson-like generator hardware

Address–Event–Representation (AER) is a communication protocol for transferring images between chips, originally developed for bio-inspired image-processing systems. Such systems may consist of a complicated hierarchical structure with many chips that transmit images among them in real time, while performing some processing (for example, convolutions). In developing AER-based systems it is very convenient to have available some means of generating AER streams from on-computer stored images. Rank order coding (ROC) and Poisson rate coding are the extremes of spikes coding. In this paper, we present a pseudo-random hardware method for generating AER streams in real time from a sequence of images stored in a computer's memory. The Kolmogorov–Smirnov test has been applied to quantify that this method follows a Poisson distribution of the spikes. A USB–AER board, developed by our RTCAR group, have been used for the measurements. An example scenario of use under the EU CAVIAR project is presented.     

Asynchronous event‐based high speed vision for microparticle tracking

This paper presents a new high speed vision system using an asynchronous address‐event representation camera. Within this framework, an asynchronous event‐based real‐time Hough circle transform is developed to track microspheres. The technology presented in this paper allows for a robust real‐time event‐based multiobject position detection at a frequency of several kHz with a low computational cost. Brownian motion is also detected within this context with both high speed and precision. The carried‐out work is adapted to the automated or remote‐operated microrobotic systems fulfilling their need of an extremely fast vision feedback. It is also a very promising solution to the micro physical phenomena analysis and particularly for the micro/nanoscale force measurement.     

A New Model of Charging Demand Related to Plug-in Hybrid Electric Vehicles Aggregation

This paper offers a comprehensive and exact model for Plug-in Hybrid Electric Vehicle (PHEV) aggregation based on the real statistics. For this purpose, available transportation and technical reports are analyzed to extract Cumulative Distribution Functions and accurate modeling of PHEVs charging load profile. We can study PHEVs effects on the distribution system by analyzing available registered data; however, the main problem is that such data, due to the low penetration of PHEVs, are not accessible, and expensive monitoring equipment such as Global Positioning Systems are needed to collect such data. Therefore, due to the lack of access to such data, researchers have offered different estimations for the charging load profile of PHEVs using statistical methods. In this study, a new model for the initial state of charge (SOC) is introduced that it is a function of fuel consumption of the vehicles. The driving behaviors such as speed and road slope have been considered in the proposed model. Simulation results show the impressiveness effectiveness and accuracy of the proposed methodology.     

Indoor air quality audit implementation in a hotel building in Portugal

Hotels are designed to provide high levels of comfort for guests; however, frequent complaints related to uncomfortable thermal environment and inadequate indoor air quality (IAQ) appear. On the other hand, there is little research concerning IAQ audits of hotels up to now.     

实时多任务内核在电力系统励磁调节器中的应用

介绍了实时多任务内核的基本概念，以及利用其进行开发的突出优点。详细介绍了将实时多任务内核应用于励磁调节器时的硬件和软件设计方案，系统采用TMS320C32芯片作为CPU芯片，并以TMS320C32汇编语言实现了抢占式实时多任务调度算法。方案着重讨论了应该根据实时性、事件发生频率、任务操作时间的原则将目标系统划分为相对独立的I／O任务、内部任务、任务合并模块，以及如何赋予每个任务一定的优先级，提供将嵌入式实时多任务内核置入目标系统的一个比较具体的方法。     

Trigeneration integrated with absorption enhanced reforming of lignite and biomass

A technical investigation of an innovative trigeneration integrated with absorption enhanced reforming (AER) of lignite and biomass is carried out using the ECLIPSE process simulator. The system includes an internal combustion engine, an AER gasifier, a waste heat recovery and storage unit and an absorption refrigerator. The whole system is operated in the following sequence: The AER gasifier is used to generate hydrogen using lignite and biomass; the hydrogen generated is used to run the engine which drives a generator to produce electricity. Additionally, the heat recovery unit collects waste heat from the engine and is used to supply hot water and space heating. Furthermore, the waste heat is used to operate the absorption refrigerator. The electricity, heat and cooling can be used to meet the energy requirements for the households in a village, a resident building or a commercial building, or a supermarket. Within the study, the effects of lignite mixed with three different types of biomass (straw, willow and switch grass) on the system performance are investigated and the results are compared. The results show that it is feasible to use an AER system to reform the low quality fuels lignite and biomass to generate a cleaner fuel - hydrogen to replace fossil fuels (diesel or natural gas) and to fuel an engine based trigeneration system; the system works with high efficiencies and with a potential of carbon capture from the sorbent-regeneration process that would benefit the environment.     

高温后砂岩冲击破坏前兆的试验研究

对高温后砂岩样品,在SHPB实验装置上进行了冲击试验,获得了高温后砂岩应力应变曲线,试验结果表明,砂岩动载强度基本上随着温度升高而降低。利用预测岩石宏观破坏前兆现象的能量加速释放理论(AER)对试验数据进行拟合,得到表征能量加速释放程度的参数值均小于1,表明在岩石试件最终破坏之前,弹性应变能呈加速释放。参数z随着温度升高而升高,表明岩石临破坏前能量加速释放的程度随温度升高而降低。研究工作进一步完善和发展了能量加速释放理论（AER）,首次运用能量加速释放理论揭示高温后岩样在冲击载荷下临破坏的能量释放特征。