中缅伊江上游电源电站孤网运行探讨

近年中缅两国合作开发伊洛瓦底江上游水电,成为举世瞩目的能源合作工程。但由于当地电能匮乏,无法为大电站施工提供电能,须先期建设1座施工电源电站。由此,组成一个孤网供电系统,鉴于缅甸的环境特点,这种孤网运行缺点和困难也是少见的,笔者就这种电网运行作分析探讨。     

AD7794在高精度低功耗测量装置中的应用

采用AD7794,一种典型的仪用ADC,与超低功耗混合信号处理器MSP430F1611,构成了一个测量计量电路.实际使用表明,该电路具有低功耗、高精度和长期稳定性的特点;实测非线性度不大于10-3量级,能满足大多教工业测量计量的要求.     

On the model-based networked control for singularly perturbed systems

In this paper, the control of a two-time-scale plant, where the sensor is connected to a linear controller/actuator via a network is addressed. The slow and fast systems of singularly perturbed systems are used to produce an estimate of the plant state behavior between transmission times, by which one can reduce the usage of the network. The approximate solutions of the whole systems are derived and it is shown that the whole systems via the network control are generally asymptotically stable as long as their slow and fast systems are both stable. These results are also extended to the case of network delay.     

浅议视觉传达设计中的“空白”

空白,也称为"虚空间",指被其他要素包围的空间。空白部分运用的好,有时则会成为设计中最突出、最令人瞩目的部分。本文就针对空白在视觉设计中的一些作用做相关的探讨。     

基于WebGIS高速公路应急联动系统设计

随着高速公路路网建设的不断加快,车辆的逐年迅猛增长,原有零散的信息化技术辅助支持已远远满足不了对应急事件处置的需求,建设全方位及时有效的应急联动系统成为高速公路信息化建设重点.文中根据对高速公路基础业务数据和GIS数据的整合与共享进行分析研究,充分运用WehGIS技术、手机定位技术、无线视频监控技术等各种先进信息技术,在J2EE平台上利用MVC开发模式,采用B/S结构,并结合ArcGIS地理信息系统平台,探讨高速公路应急联动系统的设计及其具体实现.     

工作流引擎的模型应用分析

结合中小型企业的办公应用背景,深入研究了管理系统中工作流引擎所采用的工作流模型。并从工作流模型的逻辑关系出发,详细分析了组成工作流模型的三大部分（过程模型、组织模型和资源信息模型）的模型结构,由其提供工作流模型的基本功能。     

商业诽谤犯罪中网络服务提供者行为的技术与法律分析

在本案中,刑法及其司法解释完全从商业诽谤犯罪实行行为的角度进行解释,没有重视网络信息服务提供者的行为特点,实际上导致难以根据刑法以及司法解释分析网络服务提供者在网络商业诽谤违法犯罪中的责任。在商业诽谤刑事案件中,网络服务提供者不仅有义务向侦查机关提供有关资料,而且由于其在信息监管责任缺位,必须对其设置责任追究的机制,从而推动其履行商业诽谤信息审查义务。     

Implementation and evaluation of parallel FFT on Engineering and Scientific Computation Accelerator (ESCA) architecture

The fast Fourier transform (FFT) is a fundamental kernel of many computation-intensive scientific applications.This paper deals with an implementation of the FFT on the accelerator system,a heterogeneous multi-core architecture to accelerate computation-intensive parallel computing in scientific and engineering applications.The Engineering and Scientific Computation Accelerator (ESCA) consists of a control unit and a single instruction multiple data (SIMD) processing element (PE) array,in which PEs communicate with each other via a hierarchical two-level network-on-chip (NoC) with high bandwidth and low latency.We exploit the architecture features of ESCA to implement a parallel FFT algorithm efficiently.Experimental results show that both the proposed parallel FFT algorithm and the ESCA architecture are scalable.The 16-bit fixed-point parallel FFT performance of ESCA is compared with a published work to prove the superiority of the mapping algorithm and the hardware architecture.The floating-point parallel FFT performances of ESCA are evaluated and compared with those of the IBM Cell processor and GPU to demonstrate the computing power of the ESCA system for high performance applications.     

PS对剪贴图层创建图层样式的方法

该文介绍了设计Logo时对剪贴图层创建图层样式的方法。