飞行管理计算机自动测试系统设计

介绍了所设计的飞行管理计算机（FMC）自动测试系统，重点描述了测试系统的硬件和主控测试软件的设计思想、软件流程设计和用LabWindows/CVI的具体实现方法。该测试系统较好地满足了FMC测试手册的要求。     

汽车巡航控制系统的模糊控制与应用

本文介绍的数字式汽车巡航控制系统以ATmega16为主控单元,以模糊PID作为控制算法。详细给出了此系统的硬件设计框图、软件流程及模糊PID算法的具体设计。     

基于I2C总线的键盘显示模块设计

介绍了利用P87LPC76X系列单片机设计的一个键盘显示模块，通过12C总线与主控芯片相连，具有灵活、控制方便等特点。文中给出了部分硬件设计和软件流程。     

某飞机环境控制计算机仿真测试系统设计

通过研究机载环境控制系统控制功能,分析环境控制系统计算机接口和需求,设计了基于Vx-Works技术的实时仿真测试系统.该系统构建了反射内存实时网络,建立了飞机环境控制系统仿真测试模型.通过管理主控软件运行流程,实现环境控制系统计算机控制功能、性能手动测试和自动测试.     

集群系统中央控制器主控单元的设计

本文以自行研制的“多信道共用通信与报警系统”为例,对系统中央控制器的主控单元做了比较全面的介绍,阐述了利用单片机实现系统中心的控制过程,给出了系统主控单元软件控制流程。     

基于虚拟仪器的高压电气综合测控台的提出与设计

针对高压电气设备分立测试的不足，提出了运用虚拟仪器概念的高压电气设备综合测控台的设计方案，详细阐述了其设计原理，并介绍了LabVIEW主控软件的设计与实现。     

基于FPGA的误码率测试仪的设计与实现

本文提出了一种使用FPGA实现误码率测试的设计及实现方法。该设计可通过FPGA内建的异步串行接口向主控计算机传递误码信息。也可以通过数码管实时显示一段时间内的误码率。文章先介绍了系统构成和工作流程，然后重点分析了关键技术的实现。     

滚筒扫描仪主控电路的设计

主控电路是控制滚筒扫描仪的关键部分，本文介绍了一种高分辨率滚筒扫描仪的主控电路的设计，包括整体设计、扫描接口控制与LUT查找表计算系统、外围控制及PLL芯片设计。     

电台主控单元频率合成控制信号检测技术研究

为了对某型电台主控单元进行有效地测试,满足电台测试的迫切需求,提出了一种基于功能测试的检测方法,对主控单元输出控制信号进行检测,以判断其工作状态的好坏;通过对电路原理的分析,明确了控制信号的性能特征和参数指标;研究了检测整体思想和具体的检测技术和方法;详细介绍了检测过程中软件和硬件的设计思路和使用方法;实践表明,该方法能对主控单元时序信号进行有效的测试,软件设计有较好的通用性,能大幅提高电台主控单元测试水平.     

专用网络中FMC的初步研究

介绍了固定移动融合（FMC）的背景、定义、特点,对FMC实现技术之一的IP多媒体子系统（IMS）的特点和架构进行了阐述。结合某专用网络应用需求,对IMS体系架构及会话消息进行了适应性改进,提出了基于IMS架构实现某专用网络FMC的系统框架,最后给出了专用网络基本话音业务的会话控制流程。     

工业机器人实验多媒体教学软件的开发和应用

根据“机器人技术”课程的内容和有关实验教学的基本要求,开发了用于工业机器人实验的多媒体教学软件。软件的编制基于广东工业大学FMOC中心的硬件环境,做到了多媒体技术与实验设备的有机结合。     

Monitoring herbaceous fuel moisture content with SPOT VEGETATION time-series for fire risk prediction in savanna ecosystems

This paper evaluated the capacity of SPOT VEGETATION time-series to monitor herbaceous fuel moisture content (FMC) in order to improve fire risk assessment in the savanna ecosystem of Kruger National Park in South Africa. In situ herbaceous FMC data were used to assess the Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Vegetation Dryness Index (VDI), Improved VDI (IVDI), and Accumulated Relative NDVI Decrement (ARND) during the dry season. The effect of increasing amounts of dead vegetation on the monitoring capacity of derived indices was studied by sampling mixed live and dead FMC. The IVDI was proposed as an improvement of the VDI to monitor herbaceous FMC during the dry season. The IVDI is derived by replacing NDVI with the integrated Relative Vegetation Index (iRVI), as an approximation of yearly herbaceous biomass, when analyzing the 2-dimensional space with NDWI. It was shown that the iRVI offered more information than the NDVI in combination with NDWI to monitor FMC. The VDI and IVDI exhibited a significant relation to FMC with R² of 0.25 and 0.73, respectively. The NDWI, however, correlated best with FMC (R² = 0.75), while the correlation of ARND and FMC was weaker (R² = 0.60) than that found for NDVI, NDWI, and IVDI. The use of in situ herbaceous FMC consequently indicated that NDWI is appropriate as spatio-temporal information source of herbaceous FMC variation which can be used to optimize fire risk and behavior assessment for fire management in savanna ecosystems.     

The UniSet approach for the programming of flexible manufacturing cells

Flexible manufacturing cells (FMC) may be considered the most significant development in small-batch manufacturing. Setting-up and operating costs of FMC prove to be the most major hindrance to their large-scale implementation and use, particularly by small and medium size industries. Incompatibilities between the different components constituting the cells and the lack of a unified language/approach to programming and coordinating them are cited as the cause of the complexity of setting up and subsequently operating the cells. In order to eliminate these difficulties, a new philosophy for setting-up, programming and control of FMC has been developed. This paper reports the effort to develop this new unified manufacturing instruction set and its environment, called here “UniSet”, its philosophy and some of the components of the UniSet environment. UniSet has been developed as a non-exclusive unified manufacturing instruction set, based on comparisons of the prevailing machine tool and programming primitives. UniSet allows programmers to deal with only one instruction set, if they so desire, in a single coherent environment, rather than numerous machine programming languages. The software system is coded in an object-oriented programming (OOP) language, Smalltalk, and derives its paradigm from the OO philosophy. Test results are also included to demonstrate the applicability of the approach employed.     

Evaluation of system configuration of FMC for metal cutting

In the FMS of the next generation, the system configuration is to be of modular type, in which the basic module is that of an FMC. In addition, this FMC enables the FMS technology to be avialable for town and medium-size industries. To cope with such trends surrounding the FMC, it is now required to establish a design theory for special-purpose FMC and also a standardization method of FMC. Regarding the latter problem, thus, the similarity evaluation method of the FMC for metal cutting has been investigated to propose a classification method of FMC. The similarity evaluation proposed here puts its main stress on the system configuration, especially on the characteristics of the system component and work flow pattern, and to enable the evaluation procedure to be simplified, the FMC is represented with a directed graph. Through some trial applications, it can be verified that the proposed method is reliable and effective from the practical point of view.     

FMC3500板式给料机驱动系统变频改造的可行性分析

针对FMC3500板式给料机液压驱动系统存在维护技术要求高,工艺复杂,故障率偏高的问题,探讨了将FMC3500板式给料机液压驱动系统改造成变频驱动系统的可行性;介绍了FMC3500板式给料机变频驱动系统的主要设备及选型设计,并从设备投资费用、运行维护两个方面对液压驱动系统和变频驱动系统进行了比较。分析结果表明,将板式给料机液压驱动系统改造成变频驱动系统是完全可行的,可以更好地提高半连续生产系统的生产效率。     

蓝牙UMA接入点的研究与设计

UMA是实现移动与固网融合的一种新型网络技术。蓝牙UMA接入点主要利用蓝牙PAN Profile实现无线网络和固定网络之间的连接。文中针对UMA网络的拓扑结构,分析了该蓝牙接入点的体系结构,并利用IVT公司的蓝牙协议栈对其逻辑架构和消息/数据流结构进行了初步设计。     

Estimating live fuel moisture content from remotely sensed reflectance

Fuel moisture content (FMC) is used in forest fire danger models to characterise the moisture status of the foliage. FMC expresses the amount of water in a leaf relative to the amount of dry matter and differs from measures of leaf water content which express the amount of water in a leaf relative to its area. FMC is related to both leaf water content and leaf dry matter content, and the relationships between FMC and remotely sensed reflectance will therefore be affected by variation in both leaf biophysical properties. This paper uses spectral reflectance data from the Leaf Optical Properties EXperiment (LOPEX) and modelled data from the Prospect leaf reflectance model to examine the relationships between FMC, leaf equivalent water thickness (EWT) and a range of spectral vegetation indices (VI) designed to estimate leaf and canopy water content. Significant correlations were found between FMC and all of the selected vegetation indices for both modelled and measured data, but statistically stronger relationships were found with leaf EWT; overall, the water index (WI) was found to be most strongly correlated with FMC. The accuracy of FMC estimation was very low when the global range of FMC was examined, but for a restricted range of 0-100%, FMC was estimated with a root-mean-square error (RMSE) of 15% in the model simulations and 51% with the measured data. The paper shows that the estimation of live FMC from remotely sensed vegetation indices is likely to be problematic when there is variability in both leaf water content and leaf dry matter content in the target leaves. Estimating FMC from remotely sensed data at the canopy level is likely to be further complicated by spatial and temporal variations in leaf area index (LAI). Further research is required to assess the potential of canopy reflectance model inversion to estimate live fuel moisture content where a priori information on vegetation properties may be used to constrain the inversion process.     

基于IMS的固网移动融合技术的研究

该文分析了以IMS为基础的固网移动融合技术,从各个角度分析了融合技术的发展和它与IMS网络间的关系。并且分析了IMS是如何对固网融合技术支持。首先介绍了IMS的基本概念,以及FMC,并把它分成了四种类型。最后给出了以IMS实现固网移动融合的适用性。     

Sensitivity of spectral reflectance to variation in live fuel moisture content at leaf and canopy level

Wildland fires burn large areas of the earth's land surface annually, causing significant environmental damage and danger to human health. In order to mitigate the effects, and to better manage the incidence of such fires, fire behaviour models are used to predict, among other things, the likelihood of ignition, the rate of spread, and the intensity and duration of burning. A key input parameter to these models is the amount of water in the vegetation, described as the fuel moisture content (FMC). A number of studies have shown that vegetation indices (VI) calculated from red and NIR reflectances may be used to map spatial and temporal variation in FMC in a range of fire-prone environments, with varying degrees of success. Strong empirical relationships may be established between VI and FMC over grasslands, yet over shrublands and forests, the relationships are weaker. If FMC is to be estimated with greater accuracy and consistency than is currently achieved, it is necessary to fully understand the relative contribution that spatial and temporal variation in the various biophysical and geometrical variables make to reflectance variability at the leaf and canopy level.This paper uses a modelling approach to investigate the sensitivity of reflectance data at leaf and canopy level to variation in the biophysical variables that are used to compute FMC. At the leaf level, the results show that the sensitivity of reflectance to variation in leaf water and dry matter content, used to compute FMC, is greatest in the SWIR and NIR, respectively. Variation in FMC has no effect in the visible wavelengths. At the canopy level, the results show that the sensitivity of reflectance to variation in leaf water and dry matter content is heavily dependent upon the type of model used and the range of variation over which the variables are tested. In the longer wavelengths of the SWIR, the competing influence of variable leaf area index, fractional vegetation cover, and solar zenith angle is shown to be greater than that at the shorter wavelengths of the SWIR and NIR. Empirical relationships between the normalised difference water index (NDWI) and FMC are shown to be weaker than that with canopy water content. However, when the range of the variables under study is more limited, useful empirical relationships between FMC and remotely sensed VI may be established.     

Linking ecological information and radiative transfer models to estimate fuel moisture content in the Mediterranean region of Spain: Solving the ill-posed inverse problem

Live fuel moisture content (FMC) is a key factor required to evaluate fire risk and its operative and accurate estimation is essential for allocating pre-fire resources as a part of fire prevention. This paper presents an operative and accurate procedure to estimate FMC though MODIS (moderate resolution imaging spectrometer) data and simulation models. The new aspects of the method are its consideration of several ecological criteria to parameterize the models and consistently avoid simulating unrealistic spectra which might produce indetermination (ill-posed) problems when inverting the model. The methodology was operatively applicable to 12 shrubland plots located in different provinces of the Mediterranean region of Spain and tested with field data collected in those areas. The results showed that the proposed method efficiently tracks changes of FMC with average errors around 15%. However the model under-estimates FMC values higher than 135.68% since those situations were not included in the simulation scheme and the inversion precision is also dependent on an accurate estimation of LAI. These limitations will be overcome in future work mainly by including spectral signatures of vegetation with FMC values higher than 135.68% in the simulations, and by exploring new methods for LAI retrieval. Further efforts will also be devoted to extend this approach to other ecosystems.