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2006 International Conference on Advances in Space Technologies最新文献

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Blind Source Separation and Genetic Algorithm for Image Restoration 图像恢复的盲源分离与遗传算法
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313821
Hujun Yin, I. Hussain
Digital images often suffer from point spreading or blurring from both known and unknown filters or point spread functions. The sources of degradation can be lens point spreading, misfocus, motion, and scattering in case of x-ray images or atmospheric turbulence. Therefore a digital image can suffer blurring from a single or a combination of various point spread functions, for example many images suffer from lens out of focus blur because of manufacturing limitations or satellite/aerial images suffer from lens focus and atmospheric turbulence etc. The obvious requirement of an imaging system is to reproduce an image that is as close to original as possible. Most existing image restoration methods uses blind deconvolution and deblurring methods that require good knowledge about both the signal and the filter and the performance depends on the amount of prior information regarding the blurring function and the signal. Often an iterative procedure is required for estimating the blurring function such as Richardson-Lucy method and is computational complex and expensive and sometime unstable. This paper presents a blind image restoration method based on techniques of blind signal separation (BSS) in combination with the genetic algorithm for parameters optimization. The method is not only simple but also requires little priori knowledge regarding the signal and the blurring function
数字图像经常受到已知和未知滤波器或点扩散函数的点扩散或模糊。退化的来源可以是透镜点扩散,失焦,运动,以及在x射线图像或大气湍流的情况下散射。因此,数字图像可能会因单个或多种点扩展函数的组合而出现模糊,例如,由于制造限制,许多图像会出现镜头失焦模糊,或者卫星/航空图像会受到镜头聚焦和大气湍流等的影响。成像系统的一个明显要求是尽可能地再现出接近原始的图像。大多数现有的图像恢复方法使用盲反卷积和去模糊方法,这些方法需要对信号和滤波器都有很好的了解,并且性能取决于关于模糊函数和信号的先验信息的数量。通常需要一个迭代过程来估计模糊函数,如Richardson-Lucy方法,计算复杂,昂贵,有时不稳定。提出了一种基于盲信号分离技术,结合遗传算法进行参数优化的图像盲恢复方法。该方法不仅简单,而且对信号和模糊函数的先验知识要求也很低
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引用次数: 27
Application of Remote Sensing Techniques for Water Resources Planning and Management 遥感技术在水资源规划与管理中的应用
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313815
A. Shakoor, A. Shehzad, Muhammad Nadeem Asghar
This paper describes the importance and capabilities of modern techniques such as remote sensing (RS) and geographic information systems (GIS) as water resource management and conservation tool. RS/GIS analysis can show where water enters a system and how it leaves through evapotranspiration and runoff. Using this information, planners can identify areas where there is potential for development of new water resources; where water can be reallocated from one use or one basin to another; and identify potential areas of water scarcity before water shortages occur. The main objective of this research is to calculate accurate crop water requirement by using RS/GIS in combination with hydraulic models. The results helped in devising guidelines, which in turn will help the policy makers to release the water supplies based on crop requirement only rather than supply based. Multi temporal satellite images were used to identify various crops and cropping pattern in the area. This study was conducted for the Pehure high level canal (PHLC) and the upper Swat canal (USC) system in the North Western Frontier Province (NWFP) of Pakistan. Crop identification at distributary level was made from multi-temporal remote sensing satellite images. Various image processing techniques such as supervised, unsupervised classification and spectral mixture analysis were used to correctly identify various types of crops in the region and ultimately accurate areas of all the classified crops was calculated from the satellite images. These calculated areas were compared with the seasonal data recorded by the irrigation department. ET was calculated using CROPWAT model at various stages of crop growth. Then water required for each individual crop was calculated. The results are very encouraging. The results of this study can be used while devising guidelines for water managers to release the canal supplies based on crop water requirement This practice will help in avoiding wastage of canal water at farm level, which can be optimally used for increasing irrigated areas and crop productivity in the area.
本文阐述了遥感(RS)和地理信息系统(GIS)等现代技术作为水资源管理和保护工具的重要性和能力。RS/GIS分析可以显示水进入系统的位置以及它如何通过蒸发蒸腾和径流离开系统。利用这些信息,规划人员可以确定有潜力开发新水资源的地区;水可以从一种用途或一个水盆重新分配到另一种用途;并在水资源短缺发生之前确定潜在的水资源短缺地区。本研究的主要目的是利用RS/GIS结合水力学模型,精确计算作物需水量。研究结果有助于制定指导方针,这反过来将有助于决策者仅根据作物需求而不是基于供应来释放水供应。利用多时相卫星图像对该地区的各种作物和种植模式进行了识别。本研究是针对巴基斯坦西北边境省(NWFP)的Pehure高水位运河(PHLC)和上斯瓦特运河(USC)系统进行的。利用多时相遥感卫星影像进行了流域作物识别。利用监督分类、无监督分类、光谱混合分析等多种图像处理技术,正确识别区域内各类作物,最终从卫星图像中计算出所有分类作物的准确面积。这些计算面积与灌溉部门记录的季节性数据进行了比较。利用crowat模型计算作物生长各阶段的蒸散发。然后计算出每种作物所需的水量。结果非常令人鼓舞。这项研究的结果可以用来为水资源管理者制定指导方针,根据作物的需水量来释放运河供应。这种做法将有助于避免农场一级运河水的浪费,可以最佳地用于增加该地区的灌溉面积和作物生产力。
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引用次数: 5
Role of Satellites for Renewable Energy Generation Technologies in Urban Regional and Urban Settings 卫星对可再生能源发电技术在城市、区域和城市环境中的作用
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313818
A. Ghayur
This paper discusses the renewable energy sector and the role satellites can play in its development and deployment. Satellite based sensors can provide useful information regarding the renewable energy sources such as solar, wind, biodiesel and hydropower. This paper also discusses the concept of distributed power generation and how the renewable energy power can be used to implement the concept. Satellites can not only be used to introduce renewable energies in already developed metropolises but also help identify the potential areas for different resources in different regions, thus helping the planners to include the renewable energy power generation during planning phases. Paper has also looked upon the status of energy in Pakistan and how Pakistan can use renewable energy to diversify its energy mix and meet its growing energy demands.
本文讨论了可再生能源领域以及卫星在其开发和部署中可以发挥的作用。基于卫星的传感器可以提供有关太阳能、风能、生物柴油和水电等可再生能源的有用信息。本文还讨论了分布式发电的概念以及如何利用可再生能源发电来实现这一概念。卫星不仅可以用于在已经发达的大都市引入可再生能源,还可以帮助确定不同地区不同资源的潜在区域,从而帮助规划者在规划阶段纳入可再生能源发电。Paper还研究了巴基斯坦的能源状况以及巴基斯坦如何利用可再生能源使其能源结构多样化并满足其日益增长的能源需求。
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引用次数: 12
Study of Nonlineare Dynamics of Ozone Layer Depletion for Stratospheric Region of Pakistan using Ground Based Instrumentation 利用地面仪器研究巴基斯坦平流层区域臭氧层耗损的非线性动力学
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313791
Ayub KhanYousuf Zai, Asif R Khan
The stratosphere is one of the constituents of thermal structure of the atmosphere. The maximum concentration of ozone is found at the stratospheric region where it is interacted by many species including chemical and physical processes. Atmosphere as a whole is an open system that is regarded as a non linear system and that seems to be complex. Therefore, a non-linear trend is plausible to explain phenomenon of ozone layer depletion (OLD). In this manuscript we have paid our attention is the analysis of the major portion of historic data on stratospheric O3 based on ground-based measurements by the Dobson spectrophotometer. In this communication we have estimated parameters for describing non-linearity in the process using polynomial trend functions and predicted values are calculated for the period from 1960 to 1999. Future values for ozone depths are computed till 2006 and compared with the minor portion of the data set
平流层是大气热结构的组成部分之一。臭氧的最大浓度出现在平流层区域,在那里臭氧受到多种物质的相互作用,包括化学和物理过程。大气作为一个整体是一个开放系统,被认为是一个非线性系统,看起来很复杂。因此,非线性趋势似乎可以解释臭氧层耗竭现象。在这篇手稿中,我们注意的是基于多布森分光光度计地面测量的平流层臭氧历史数据的主要部分的分析。在本文中,我们使用多项式趋势函数估计了描述过程中非线性的参数,并计算了1960年至1999年期间的预测值。臭氧深度的未来值计算到2006年,并与数据集的一小部分进行比较
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引用次数: 3
Use of RS & GIS in Flood Forecasting and Early Warning System for Indus Basin RS和GIS在印度河流域洪水预报预警系统中的应用
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313790
H. Sharif, M. A. Hashmi
Inundation mapping for Indus River and its tributaries is a large as well as complex task to undertake. GIS and remote sensing technologies enable us to handle the complexity involved in the development and maintenance of such large systems. The main feature of such systems is the easy incorporation of changes to system. The influence of a revision in methodology at any stage of the system development lifecycle does not propagate to every other stage of the system thus allowing for incremental development. Moreover, the savings in time and project cost cannot be stressed more as use of satellite technology complements conventional engineering techniques for data gathering and lead to more information rich systems
印度河及其支流的淹没测绘是一项庞大而复杂的任务。地理信息系统和遥感技术使我们能够处理开发和维护此类大型系统所涉及的复杂性。这类系统的主要特点是易于将更改合并到系统中。在系统开发生命周期的任何阶段,方法修订的影响都不会传播到系统的每个其他阶段,从而允许增量开发。此外,时间和项目费用的节省再怎么强调也不为过,因为卫星技术的使用补充了收集数据的传统工程技术,并导致信息更丰富的系统
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引用次数: 4
GaliSys: Fully Integrated Software Configurable Receiver Integrated Circuit(s) (ICs) for GALILEO Radio Navigation Satellite Systems and its Applications in Disaster Management and Rehabilitation GaliSys:用于GALILEO无线电导航卫星系统及其在灾害管理和恢复中的应用的完全集成软件可配置接收器集成电路(ICs)
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313796
A. Telli, E. Çetin, I. Kale
Statistics show that the numbers of natural disasters are on the increase, resulting in increased numbers of human and economic losses. It is therefore, of paramount importance to effectively and efficiently manage a large-scale disaster by utilizing and deploy the Galileo based technology developed for disaster management and rehabilitation. The University of Westminster's, Applied DSP and VLSI research group (ADVRG) has been working on a project, called GaliSys, to design, manufacture, test and commission "fully integrated software configurable receiver integrated circuit(s) (ICs)" for GALILEO radio navigation satellite(s). GaliSys will not only be used in looming disaster early warning systems but also can be used to provide live damage information on highways, airports, railways, pipes and associated essential infrastructure facilities prior to and soon after the disaster which will be of invaluable use to the emergency services. Furthermore, GaliSys may also provide accurate data for observing possible flood risk areas as well as providing means to locate relief and rescue personnel and vehicles in big wild fires. In addition to these, one other application area of GaliSys may be in effective relief provision for refugees in war stricken parts of the world. GaliSys provides a highly integrated, low-power and flexible platform which is readily user configurable to tailor it to the specific applications and needs. In this paper, the GaliSys project together with its possible applications in disaster management and rehabilitation are presented
统计数据表明,自然灾害的数量正在增加,造成更多的人员和经济损失。因此,通过利用和部署为灾害管理和恢复而开发的基于伽利略的技术,有效和高效地管理大规模灾害是至关重要的。威斯敏斯特大学应用DSP和VLSI研究小组(ADVRG)一直致力于一个名为GaliSys的项目,为GALILEO无线电导航卫星设计、制造、测试和调试“完全集成的软件可配置接收器集成电路(ic)”。GaliSys不仅将用于迫在眉睫的灾难早期预警系统,而且还可用于在灾难发生之前和之后不久提供有关高速公路、机场、铁路、管道和相关基本基础设施的现场损害信息,这将对应急服务具有宝贵的用途。此外,GaliSys还可以提供准确的数据,用于观察可能存在洪水风险的地区,并提供在野火中定位救援人员和车辆的方法。除了这些之外,全球一体化系统的另一个应用领域可能是向世界受战争影响地区的难民提供有效救济。GaliSys提供了一个高度集成,低功耗和灵活的平台,易于用户配置,以适应特定的应用和需求。本文介绍了GaliSys项目及其在灾害管理和恢复方面的可能应用
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引用次数: 0
Depleting Wetlands of Lower Sindh, Pakistan: A Spatio-Temporal Study through Satellite Remote Sensing 巴基斯坦信德省下游湿地枯竭:基于卫星遥感的时空研究
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313786
Syed Jamil Hasan Kazmi, Salman Qureshi, Mairaj Uddin Siddiqui, M. Arsalan
Wetlands are among the world's most productive environments and are essential part of our landscape. They are the cradle of biological diversity and a vital component of the freshwater cycle. Wetlands provide countless benefits that include rich floral and faunal habitat, improved water quality, flood abatement, water storage and groundwater recharge, support of fisheries, and opportunities for education and recreation. Wetlands are dynamic ecosystems with complex interrelationships of hydrology, soils and vegetation. In Pakistan, wetlands cover approximately 9.7% (78,000 sq.km.) of its total area. However like other green areas these wetlands are also under tremendous environmental degradation. As a result, this important environmental source is depleting at an alarming rate. Therefore, an up to date scientific technology is required to monitor wetlands effectively. In this study the main task is to develop a GIS based wetlands inventory for the lower Sindh region in Pakistan. For this purpose, wetlands - on medium and high resolution satellite data have been identified and we also monitor the spatial and temporal changes in the wetlands within last ten years. Through this exercise it has established that the satellite remote sensing (SRS) and geographical information systems (GIS) are the state-of-the-art technologies for mapping, monitoring, and management of huge wetlands
湿地是世界上最具生产力的环境之一,也是我们景观的重要组成部分。它们是生物多样性的摇篮,也是淡水循环的重要组成部分。湿地提供了无数的好处,包括丰富的植物和动物栖息地,改善水质,减少洪水,储水和地下水补给,支持渔业,以及教育和娱乐的机会。湿地是具有水文、土壤和植被复杂相互关系的动态生态系统。在巴基斯坦,湿地约占其总面积的9.7%(78,000平方公里)。然而,像其他绿地一样,这些湿地也面临着严重的环境退化。结果,这一重要的环境资源正以惊人的速度枯竭。因此,需要一种最新的科学技术来有效地监测湿地。本研究的主要任务是为巴基斯坦信德省下游地区开发一个基于GIS的湿地清单。为此,我们对近十年来湿地的中、高分辨率卫星数据进行了识别,并对湿地的时空变化进行了监测。通过这项工作,它确定了卫星遥感(SRS)和地理信息系统(GIS)是绘制、监测和管理大型湿地的最先进技术
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引用次数: 3
Digital Image Processing of High Resolution Aerial Photograph of Shallow Marine Sanctuary, Victoria, Australia 澳大利亚维多利亚州浅海保护区高分辨率航空照片的数字图像处理
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313823
Fawad Saeed
In this paper the potential of remote sensing as a tool to study marine sanctuary has been explored. There are two main methods that can be used to extract information from the aerial photograph/satellite imagery; visual interpretation and digital image processing. Visual interpretation takes advantage of the human skills to recognize data "content" by combining several elements of image interpretation. It relies on experience, a prior knowledge and skilled analysts qualities to produce excellent results. Alternatively, digital image classification employs computer techniques which are mostly based on the reflection values of individual pixels and use statistical pattern recognition methods. In the current study, the main area of interest was distribution of sand, rocky reef, rocky rubble and sea grass in the sanctuary. The study showed that the supervised classification approach was a superior technique to employ for such studies as compare to other traditional approaches. Here, the higher degree of interaction between the analyst and the machine complements the limitations of each other. Furthermore, the analyst is also given the opportunity to "control" which digital signatures best qualify to represent a certain resource class considering the fact that the analyst has access to ground truth data to fine tune the classification
本文探讨了遥感作为海洋保护区研究工具的潜力。从航空照片/卫星图像中提取信息主要有两种方法;视觉解释和数字图像处理。视觉解释通过结合图像解释的几个要素,利用人类的技能来识别数据“内容”。它依靠经验、先验知识和熟练的分析师素质来产生出色的结果。另外,数字图像分类采用计算机技术,这些技术主要基于单个像素的反射值,并使用统计模式识别方法。在目前的研究中,主要关注的是保护区内的沙子、岩石礁、岩石碎石和海草的分布。研究表明,与其他传统方法相比,监督分类方法是用于此类研究的一种优越技术。在这里,分析师和机器之间更高程度的交互补充了彼此的局限性。此外,考虑到分析人员可以访问真实数据以微调分类,分析人员也有机会“控制”哪个数字签名最适合表示某个资源类
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引用次数: 1
A Conceptual Framework for Earthquake Disaster Management System (EDMS) for Quetta City using GIS 基于GIS的奎达市地震灾害管理系统概念框架
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313810
M. Nazir, I. Bajwa, M. Khan
This paper, about earthquake-disaster management system of Quetta city using GIS, point up how the effects of earthquakes can be minimized. For this purpose it proposes two strategies: preparedness for when the disaster occurs and hazard mitigation and emergency response. The earthquake disaster preparedness plan is essentially a plan that identifies weaknesses and threats to the urban environment and proposes strategies to overcome these weaknesses. Earthquake disaster mitigation plan describes how to respond when a disaster occurs. GIS will be developed using risk mapping that is hazard's layers and typical or general layers. Typical layers include the layers typically necessary for developing GIS for a disaster for example service infrastructure, housing typologies, and critical emergency facilities, such as police and fire stations, and hospitals. Where as hazard's layers include seismic hazard layer, seismic micro zoning layer and risk categorization layer
本文以基于GIS的奎达市地震灾害管理系统为例,指出如何将地震的影响降到最低。为此目的,它提出了两项战略:灾害发生时的防备以及减灾和应急。地震防灾计划本质上是一项确定城市环境的弱点和威胁并提出克服这些弱点的战略的计划。地震减灾计划描述了灾难发生时如何应对。地理信息系统将使用风险图开发,即危险层和典型层或一般层。典型层包括为灾害开发GIS通常需要的层,例如服务基础设施、住房类型和关键应急设施,如警察局和消防站以及医院。哪些灾害层包括地震灾害层、地震微区划层和风险分类层
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引用次数: 5
Rainfall-Runoff Modelling using Data Driven and Statistical Methods 使用数据驱动和统计方法的降雨径流模型
Pub Date : 2006-09-01 DOI: 10.1109/ICAST.2006.313789
Saadat Khan, Linda See
This paper outlines the application of multiple linear regression and three different data-driven modeling techniques to river level forecasting for the river Ouse catchment in northern England. Lead times of 6 and 24 hours ahead were modelled. The results show that the data driven approaches generally outperformed the statistical approach and that M5 model trees have great potential for the development of transparent river level forecasting models.
本文概述了多元线性回归和三种不同的数据驱动建模技术在英格兰北部欧塞河流域水位预测中的应用。提前6小时和24小时的交货时间进行了建模。结果表明,数据驱动方法总体上优于统计方法,M5模型树在透明水位预报模型的开发中具有很大的潜力。
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引用次数: 18
期刊
2006 International Conference on Advances in Space Technologies
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