基于CPLD的FPGA快速动态重构设计

随着FPGA的广泛应用,其实现的功能也越来越多,FPGA的动态重构设计就显得愈发重要。在分析Xilinx VertexⅡPro系列FPGA配置流程、时序要求的基础上,设计了基于CPLD的FPGA快速动态重构方案,实现了同一硬件平台下多个FPGA设计版本的在线动态配置和功能重构,该技术已在工程中成功应用。     

用XCF32P实现FPGA的高速动态配置

分析了Xilinx的Vertex Ⅱ Pro系列FPGA的配置流程和时序要求，以及Xitinx的在系统可编程PROM芯片XCF32P的内部结构和功能特点，介绍了在同一硬件平台下用XCP32P对FPGA不同的软件版本实现动态加载的设计方法及应用。     

数字化可编程直接序列扩频(DP-DS/SS)系统的设计

本文介绍了一种数字化可编程直接序列扩频(DP-DS/SS)系统的设计方案,借鉴了软件无线电的思想,基于FPGA DSP的结构实现数字化可编程功能,采用动态配置技术实现多模式工作。一些关键技术的研究使系统具有较强的适应性,部分应用结果表明该系统可以很好地应用于移动卫星通信和直扩抗干扰通信。     

通用一体化测试平台设计

针对航天控制系统灵活性、复用性、可扩展性较差等问题,采用部分动态可重配置和软硬件协同设计等技术,设计了一种基于Microblaze软核的高带宽软件无线电(Software-defined Radio,SDR)通用一体化测试平台。该硬件平台由Kintex7 FPGA与集成式射频(Radio Frequency,RF)收发器AD9371组成,采用Microblaze软核进行功能开发,实现任务调度、功能配置和数据交互;通过Vivado实现测试平台逻辑功能开发,并将功能代码封装成FPGA IP(Intellectual Property)核;最终通过AD9371 RF收发器实现射频数据收发。测试结果表明,该通用一体化测试平台可进行高速率、高带宽数据传输。该平台具有通用性强、互联性强、易操作、易移植等特点,可广泛应用于工业、通信、军事、医疗、汽车、无人机、航天等领域。     

Xilinx FPGA上电时序分析与设计

提出了由于FPGA容量的攀升和配置时间的加长,采用常规设计会导致系统功能失效的观点。 通过详细描述Xilinx FPGA各种配置方式及其在电路设计中的优缺点,深入分析了FPGA上电 时的配置步骤和工作时序以及各阶段I/O管脚状态,说明了FPGA上电配置对电路功能的严 重影响,最后针对不同功能需求的FPGA外围电路提出了有效的设计建议。     

试论FPGA动态可重构技术与应用

现场可编程门阵列FPGA出现之后，FPGA动态可重构技术成为很多学者研究的对象。文章基于笔者工作实践，分析了FPGA动态可重构技术及其构成体系，探讨了FPGA动态可重构技术算法优化方略。     

基于APEX20KE系列FPGA的超长M序列限幅脉冲压缩实现

首先介绍了高占空比、长M序列搜索雷达信号处理中超长M序列脉冲限幅压缩的实现及其特点以及APEX20KE系列FPGA的特点，指出实现超长M序列实时脉冲压缩的困难，在此基础上介绍一种以ALTERA的APEX20KE系列FPGA为处理器的超长M序列实时脉冲压缩算法的实现。     

FPGA高速数字下变频

介绍了一种基于新型FPGA的高速数字下变频的实现方法,它充分利用数字下变频优化算法以及FPGA领域的新技术,去除由于数据速率过高而造成的各种瓶颈,极大地减少了计和FPGA片内资源的消耗。     

基于SOPC的DDS信号源的实现

本文介绍了直接数字频率合成(DDS)的工作原理以及基于可编程片上系统(SOPC)实现DDS信号源。设计的DDS信号源以Cyclone器件为核心,用嵌入在FPGA中的N ios软核CPU作为控制来实现频率、相位和幅度的数字预制和步进,利用FPGA的RAM位放置正弦查找表,同时利用FPGA的逻辑单元实现相位累加等其它数字逻辑功能。实现了两路相位完全正交的DDS信号源。     

基于ATM技术的有线接入网入侵检测系统研究

为了对特定用户实行实时动态数据采集,通过分析UTOPIA接口和信元结构,探讨了基于ATM技术的有线网络系统相关的协议、数据处理程序以及基于FPGA实现数据分装与重组,提出了基于ADSL接入网UTOPIA接口的IP数据包提取方法,实现了基于ATM技术的有线网络实时动态入侵检测的目标.     

Situational Management Support Systems

Digital natives increasingly populate organizations?? management. These new-generation managers more naturally accept management support systems (MSS), but also have higher expectations about how they should accommodate their individual user preferences. As a result, managers question MSS that have been developed without configuration mechanisms to accommodate their working style, relevant MSS use cases, and different MSS access modes. The objective of this article is to reveal managers?? different MSS use situations and propose levers for tailoring (conceptual) MSS design to them. Use situations generalize classes of similar user-group preferences. We first apply findings from a literature review to cluster managers?? user-group preferences into 36 MSS use situations. Second, we propose that the selection of end-user devices can serve as a main lever for MSS configuration. Third, we complete the configuration with a MSS user-interface design. Finally, we demonstrate utility of our configuration model by presenting and evaluating a prototype.     

基于列生成的毫米波多连接链路配置调度算法

多连接技术允许用户同时建立和保持与多个小区/接入点的连接，通过网络元素之间的协调在吞吐量和可靠性方面大幅提高网络性能。针对毫米波通信中超高频段的链路中断问题，研究了多连接基于链路配置的调度算法，以提高链路调度效率，降低复杂度。首先，在系统模型中采用链路配置作为优化变量；其次，设计了多连接比例公平的调度准则；最后，提出一种基于列生成算法的链路配置调度优化算法，利用Dantzig-Wolfe分解将原问题分解为限制主问题和定价问题，并结合分支定界方法获得最优解。仿真结果表明，所提算法能够在数值上逼近全局最优，并且比现有的毫米波蜂窝网络链路调度方案增益平均提高40%以上。     

Organizing foreign market activities: From entry mode choice to configuration decisions

This article takes a critical look at the extant foreign entry mode research and argues that a richer and more and dynamic view is needed in order to provide a realistic presentation of how firms organize their foreign activities. While researchers have typically assumed a very limited range of foreign operation modes, we propose a systemic rather than a myopic view of foreign operation modes by modeling the entry mode decisions of the firm as a corporate-level process. We substantially broaden the scope of mode choice, thereby moving toward a configuration decision approach. We model and provide numerical examples of how international interdependencies impact mode configuration, and then extend the analysis by incorporating dynamic aspects.     

Management Accounting Systems and Organisational Structure

In this paper we present an empirical analysis to test whether organisation configurations and management accounting systems change simultaneously. Using the original application of the fuzzy logic methodology, we analyse the level of development and implementation of the management accounting system and the organisational configuration on a sample of 501 Italian firms. Even though we employ a cross-sectional approach, the results may be interpreted according to the life cycle model. Our findings show that the evolution of the organisational configurations is not always coherent with the relevance assumed by management accounting systems. In particular, we find a large group of companies with a simple organisational configuration and a well-developed management accounting system. We interpret the presence of this cluster dynamically as an intermediate stage of growth towards more complex forms of organisation.     

自适应数字回波抵消

本文阐述了解决通信系统中回波问题而提出的一种较完善的数据驱动自适应回波抵消器的结构及性能。分析了相位抖动、频率漂移及偏值等问题对抵消器性能的影响。     

Perception value of product-service systems: Neural effects of service experience and customer knowledge

Digital trends in product-service system (PSS) development focus on developing win-win solutions for both companies and customers, particularly when considering human behavior issues. It is useful for the PSS provider to know the PSS value creation mechanism when customers are buying and utilizing a PSS, particularly in the service-dominant logic (SDL) and cognitive neuroscience perspective. This study solved the PSS implementation that satisfied the demands of both customers and manufacturers and the value cocreation mechanism during product and service configuration with the impacts of consumer learning and the service experience. The proposed neuroscience methodology is based on an ERP (event-related potential) experiment using PSS stimuli, representing the perception value creation process during customer decision making and the PSS configuration process. The effectiveness of the service experience is more important than customer knowledge during PSS value perception due to positive emotions with pleasant memories for the service experience and the conflicting cognition process of customer learning. The combination of service science and neurology may measure and observe human behavior and psychology through the brain science method and effectively solve the human factors in service science. The findings suggest a more objective and personalized understanding of PSS value perception, particularly the practical requirements of a resulted-oriented PSS and an application-oriented PSS.     

基于DEA的资源配置评估系统研究

经济是研究如何配置资源的科学。资源配置问题,一直是经济学研究的核心问题。应用先进的数学统计分析工具(数据包络分析—简称DEA)建立一个资源配置的评价模型,并以黑龙江省工业行业为例,进行了实证分析。     

三防设计技术

本文从三防设计的技术管理，设计准则，优先材料等方面的 电子设备结构设计中的三防要求。指出现代三防技术范畴，已不单是防护工艺的实施，而应涉及到电路，结构，工艺和综合性技术管理方方面面，其中结构是把“三防设计”贯彻到产品设计之中的关键。     

When less is more? The contingent effect of product supply limitation in the release of new electronic products

In the market of consumer electronics, firms often limit their product supply to create a scarcity effect to entice consumers to buy their product. However, the outcome of such a strategy is not always desirable. In this study, we propose the product configuration level as a contingent variable that works with the supply level to affect the outcome of a supply limitation strategy. With a vignette-based experiment, we find that for a product with a superior configuration, consumers' purchase intention is boosted only if the supply is very limited. For a product with an inferior configuration, however, the supply limitation strategy does not work at any supply level. Therefore, the supply limitation strategy works only for a superior product configuration and at a fine-tuned supply level.     

Leadership Dynamics in Partially Distributed Teams: an Exploratory Study of the Effects of Configuration and Distance

Despite the importance of leadership and the wealth of empirical studies focused on leadership effectiveness in traditional and computer-supported groups, there is little research examining leadership dynamics in partially distributed virtual teams (PDTs). Virtual teams are partially distributed when they are configured with one or more subgroups of collocated members and isolated members. This paper lays the groundwork for an in-depth study of leadership in PDTs that can be extended to other types of virtual team configurations. Using three dimensions of virtual distance (geographic, cultural and temporal), we analyze how the configuration of virtual teams interacts with leadership dynamics. We also summarize the results of an exploratory study using 12 student teams to examine the effects of distance and configuration on leadership in PDTs. Findings show significant differences in leadership dynamics (i.e., leader emergence vs. leader retention) which impacted team performance. From these results, we develop propositions on leadership and PDTs.