检索结果-内蒙古大学图书馆

Implementation of an ESA delta-DOR capability

ACTA ASTRONAUTICA 2009年第11-12期64卷 1041-1049页

作者： James, Nick Abello, Ricard Lanucara, Marco Mercolino, Mattia Madde, Roberto European Space Agcy ESOC Darmstadt Germany

This paper describes the implementation of delta-DOR (delta-differential one-way ranging) receivers within the ESA Deep Space ground station network. Delta-DOR provides very accurate plane-of-sky measurements of spacecraft position which complement existing line-of-sight ranging and Doppler measurements. We discuss how this technique has been adapted and implemented at the two ESA deep-space ground stations using existing equipment and infrastructure. These new capabilities were added by writing new software modules for the standard ESA digital receiver (the intermediate frequency modem system-IFMS). With these upgrades the receiver has the ability to record accurately timetagged signals from up to eight IF sub-channels. These sub-channels can have bandwidths of 50kHz-2MHz with a sample quantization of 1-16 bits per component. The IF samples are stored locally for subsequent retrieval over a WAN by the correlator facility at ESOC. (C) 2009 Elsevier Ltd. All rights reserved.

关键词： EUROPEAN SPACE AGENCY software module Receivers Wide area networks EAEC Supply Agency existing equipment Intermediate frequencies Laser-Doppler Velocimetry

来源：评论

学校读者我要写书评

暂无评论

A method of test-suite reduction for regression integration testing

引用

PROGRAMMING AND COMPUTER software 2009年第5期35卷 282-290页

作者： Kichigin, D. Yu. Sophis UK London EC3V 0AT England

This paper describes a method of test-suite reduction for regression testing of the interaction between two software modules based on a model of module interaction on a test suite and subsequent filtering of the suite using the constructed model. The interaction model is constructed in terms of sequences of interface functions of the modules being integrated called during the software run.

关键词： software module reduction Test Method regression testing

来源：评论

学校读者我要写书评

暂无评论

Fuzzy synthesis-decision model of software optimum design

Fuzzy synthesis-decision model of software optimum design

引用

2nd International Congress on Image and Signal Processing

作者： Wan, Yi Xiao, Lei Wu, Chengwen Wenzhou Univ Coll Phys & Elect Informat Engn Wenzhou Peoples R China

ISBN: (纸本)9781424441303

software reliability allocation method of the optimization decision making based on fuzzy synthesis evaluation is presented aiming at the disadvantage of the other software reliability allocation method. By analyzing the influential factors of reliability allocation, appointed reliability index of software system is distributed rationally to module by establishing factor collection of reliability level and the weight of factor and further synthesis decision-making based on attachment degree of every factor. Both reliability of whole system are ensured and production cost and exploitation period are reduced. The model is simulated and calculated by the example of numerical control system software reliability, decision-making shows reliability of position control and real-time management module is the biggest, secondly PLC module, initialization preprocessing module, coding show module respectively. It provides a feasible method for software system reliability optimum design.

关键词： Fuzzy synthesis evaluation software reliability allocation optimum design software module

来源：评论

学校读者我要写书评

暂无评论

Formal aspects of classifying and selecting business services 09

Formal aspects of classifying and selecting business service...

引用

International Conference on Autonomous Agents and Multiagent Systems

作者： Yathiraj B. Udupi Munindar P. Singh Cisco Systems Inc. North Carolina State University

ISBN: (纸本)9780981738178

This paper uses the term "service" for a service instance, and the term "agent" for an agent who provides or consumes a service. We consider real-life or business services (e.g., business process out-sourcing, software development service involving human experts). We distinguish business from computational (e.g., Web or grid) services based on the fact that business services lack the typical input-output structure of computational services. For example, one can model a temperature service as one that takes a zipcode as input and produces the current temperature as output. By contrast, it would not help to model a software development service as one that takes a "business problem" as input and produces a suite of "software modules" as output. First, it is clearly beyond the scope of current practice to create formal classes or a type system of business problems and software modules. Second, business services are not invoked but are engaged, and would rarely take single-shot inputs and produce single-shot outputs. Third, business service providers would offer a continuum of expertise along which they can provide effective services. For example, a provider who is good at payroll management may also be able to provide retirement plan management, in contrast with the temperature service example above, which has no other function. Fourth, the selection of business services relies on the agents' evaluation of previous engagements.

关键词： matching service selection vectors Business Legal Services software module single-shot Agents

来源：评论

学校读者我要写书评

暂无评论

A tool for the semiautomatic acquisition of the morphological data of blood vessel networks

A tool for the semiautomatic acquisition of the morphologica...

引用

IEEE International Symposium on Parallel and Distributed Processing with Applications

作者： Cannataro, Mario Guzzi, Pietro Hiram Tradigo, Giuseppe Veltri, Pierangelo Magna Graecia Univ Catanzaro Lab Bioinformat I-88100 Catanzaro Italy

ISBN: (纸本)9780769534718

The simulation of the dynamics of the blood flow in the venous system of the lower limb is an important tool for supporting clinical research and for suggesting possible treatments for many diseases, e.g. for enhancing the surgical treatment of Chronic Venous Insufficiency (CVI). Nevertheless the accuracy of the simulation of the blood flow is strictly related to the morphological data characterizing the investigated venous system. Although some of these data can be extracted from the observation of the real blood flow of a patient, e.g. through the acquisition of a set of images, the extraction of such values is often performed in a manual way, so the need for the automatic induction of parameters arises. The paper presents a software module that allows the semiautomatic acquisition of the morphological data of the venous system of a patient. The tool, developed as a plugin of the ImageJ imaging platform, receives in input a DICOM file containing the Computerized Tomography (CT) of the vessels network of the lower limb, and produces in a semi-automatic way a weighted graph of the network. This model can be used as the input for a subsequent simulation of the system.

关键词： Feature Extraction Image Analysis Simulation Venous System. Venous System Feature extraction simulating image analysis Blood Flow Blood Circulation software module Lower Extremity

来源：评论

学校读者我要写书评

暂无评论

Reducing vehicle maintenance using condition monitoring and dynamic planning

Reducing vehicle maintenance using condition monitoring and ...

引用

2008 4th IET International Conference on Railway Condition Monitoring

作者： Markus Bohlin Malin Forsgren Anders Holst Bjorn Levin Martin Aronsson Rebecca Steinert Swedish Institute of Computer Science Kista Sweden

It is a common fear in industry that introducing condition based maintenance (CBM), with its constant monitoring of several subsystems, will lead to more frequent service interventions compared to traditional cyclic maintenance, effectively countering the potential value of implementing CBM. Because of this, adoption of CBM must be done with great care, and the maintenance organization and planning process needs to be geared for more flexibility. To harvest the potential value in CBM for rail vehicles, we propose to combine condition monitoring with online maintenance planning. We use an adaptive planning software module to quickly find new suitable vehicle movement plans, and a heuristic packing module to reconstruct maintenance packages with as few maintenance stops as possible. This prevents vehicles from visiting the maintenance depot too frequently. At the same time, we actively keep the risk of breakdowns low. Evaluation of our methods in a simulated environment for train operation and maintenance, using real-world time tables and vehicle plans, show that by taking the operation times of individual components into account, it is indeed possible to reduce the amount of maintenance as well as the number of service interventions significantly compared to traditional cyclic maintenance.

关键词： Predictive maintenance Condition based maintenance Opportunistic maintenance Scheduling Planning condition-based maintenance Predictive maintenance vehicle Condition monitoring Planning Train operation software module rail vehicle Simulated Environment

来源：评论

学校读者我要写书评

暂无评论

Dynamic resource management in hybrid architecture for OBS control plane

Dynamic resource management in hybrid architecture for OBS c...

引用

International Conference on Electrical Engineering

作者： Raza, M. A. Mahmood, W. Al-Khawarizmi Institute of Computer Science UET

ISBN: (纸本)9781424408924

Due to separation and effective management of control and data planes, the Optical Burst Switching (OBS) has been considered as a best switching technique for next generatim all-optical networks. In order to implement OBS control plane three types of control and reservation architectures have been presented in literature e.g. centralized, distributed and hybrid. The hybrid architecture, presented by the authors, inherits the best features of distributed and centralized architectures such as scalability features of distributed model and best resouroe utilization of centralized model. In this paper a dynamic resource management for the hybrid architecture in the OBS network is presented. A design of different database tables required by different software modules to manage network resources during connection establishment / teardown phases is presented. A resource management algorithm is also designed for managing resources on the fly taking care of steps involved for lightpath establishment.

关键词： composite structures management of resources Ocean bottom seismometers software module control surfaces decentralised control Web resources Distribute Resource utilization

来源：评论

学校读者我要写书评

暂无评论

Improvement of Multiple Antennas Diversity Systems through Receiver Nonlinear Coupling Cancellation

Improvement of Multiple Antennas Diversity Systems through R...

引用

2007 International Waveform Diversity & Design Conference

作者： Igor Arambasic Francisco Javier Casajus Quiros Ivana Raos Departamento de Senales Sistemas y Radiocomunicaciones Universidad Politecnica de Madrid Madrid Spain

ISBN: (纸本)9781424412754;1424412757;1424412765

In order to gain diversity and achieve high bit rates, the recent trends in mobile communication industry include the use of multiple antennas in transmitter and at the receiver. As the mobile terminals get smaller, the number of electronic elements inside of them rises and the electronic interferences, like RF coupling, emerge. In this contribution, the coupling is modeled with polynomials limited to third order nonlinear behavior. To combat the multi antenna RF front-end coupling the software module at the output of AD converter is proposed. Inside the module, signal enhancement is achieved based on the inverse nonlinear coupling function of the 9th degree. The inverse function is solved using simulated annealing (SA) approximation method. The proposed coupling cancellation algorithm is analyzed under different system conditions showing excellent coupling cancellation characteristics.

关键词： software module multiple antenna analog digital converter CANCELLATIONS mobile terminal Receivers coupling Communication industry Transmitters Polynomial nonlinearity

来源：评论

学校读者我要写书评

暂无评论

Program Development Environment for Multiple Robot-Multiple Application System

引用

JOURNAL OF ROBOTICS AND MECHATRONICS 2006年第5期18卷 572-579页

作者： Kyousou, Tsukasa Aiyama, Yasumichi Univ Tsukuba Grad Sch Syst & Informat Engn 1-1-1 Tennodai Tsukuba Ibaraki 3058573 Japan

We propose and develop an application development environment for a robot with components such as multiple manipulators and hands. Each component is treated as a module to build the robot efficiently, easy application development targets robot diversity. The mechanism we propose manages modules and work space, enabling easy cooperative programming and efficient robot operation. To ensure application safety, we implemented the prior confirmation of robot operation and the avoidance of execution conflict.

关键词： multiple robot system robotic component software module middleware

来源：评论

学校读者我要写书评

暂无评论

A universal digital platform and software library for power electronic systems integration

A universal digital platform and software library for power ...

引用

CES/IEEE 5th International Power Electronics and Motion Control Conference

作者： Hu, Haibing Jin, Tianjun Yao, Wenxi Lu, Zhengyu Qian, Zhaoming Zhejiang Univ Natl Key Lab Power Elect Hangzhou 310027 Peoples R China

ISBN: (纸本)1424404487

A new flexible digital platform based on the fixed-pointing DSP has been developed for power electronic systems integration, whose computational power can be easily expanded by floating-point units(FPU) which are configured by a FPGA. Some IP(Intellectual Property) cores for power electronic applications, coded in VHDL for modularity and portability, have been designed and validated in the digital platform. software modules commonly used in power electronic applications are packaged in C language with fixed-point format for versatility and computation efficiency. All these IP cores and software modules are verified in real-time applications and can be easily integrated into power electronic systems.

关键词： digital platform IP core software module power electronic systems integration

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：