计算机的回顾与发展

本文主要回顾了计算机的历史,简要叙述了其实技术与应用领域的发展,经此说明芯片技术对计算机发展的基础作用,最后介绍了强国的芯片技术发展策略。     

基于PIC16F1823的磷酸铁锂电池管理系统设计

近年来,新能源汽车越来越受到人们的关注,磷酸铁锂作为动力电池新型正极材料的使用在近几年有升温的趋势。研究磷酸铁锂电池管理系统显得极其重要,文章以PIC16F1823为核心,根据磷酸铁锂电池的特性,开发出实用、低成本的管理系统。     

Reconfiguring the innovation policy portfolios for Taiwan's SIP Mall industry

Since the year 2000, silicon intellectual property (SIP), which can minimize the gap in ‘design productivity’ that exists with systems-on-chip (SOC), has become one of the most important factors in the development of integrated circuit (IC) products in the SOC era. Although SIP is very important for IC industry development, complicated business, technical as well as legal issues inside SIP transactions have hindered successful transactions and the integration of SIPs into SOCs. Thus, web-based SIP e-Commerce mechanisms, called SIP Malls, have emerged, aiming to resolve complex SIP issues. To maintain its leading position and competitiveness in the World's IC industry, as well as the value added by SOC products in Taiwanese IC firms, the Taiwanese government has developed SIP Malls, using innovation policy tools. However, the Taiwanese SIP Mall industry remains immature. No existing Taiwanese SIP Malls generate a profit or account for a significant share of worldwide SIP transactions. This research will develop an analytical framework for defining an innovation policy portfolio that aims to develop Taiwan's SIP Mall industry, so that it will enhance the value added of SIP Malls and, thus, the nation's competitiveness in the SIP and IC industries, something which already has become one of the Taiwanese government's major concerns. The industry innovation requirements (IIRs) are summarized using the Delphi method. Meanwhile, the major IIRs identified by Decision Making Trial and Evaluation Laboratory (DEMATEL) are introduced. After the IIRs are derived, the relationships between the IIRs and innovation policy tools are derived by Grey relational analysis (GRA). Then, the innovation policy tools are clustered, based upon the Grey grades derived by GRA. Finally, reconfigured innovation policy portfolios are presented for the Taiwanese government's policy definition. The results demonstrate that developing an innovative policy portfolio that includes scientific, technical, educational, public enterprise, information, legal and regulatory, financial, and taxation policy tools will be the most necessary step towards developing Taiwan's SIP Mall industry.     

How Do Developmental and Accommodative HRM Enhance Employee Engagement and Commitment? The Role of Psychological Contract and SOC Strategies

In the context of the changing workforce, this study introduced two perspectives on HRM and distinguished universalistic developmental HRM from contingent accommodative HRM. We predicted two separate pathways for the effects on two employee outcomes: work engagement and affective commitment. We expected that developmental HRM would universally relate to employee outcomes by rebalancing the psychological contract between the employee and organization into a less transactional to a more relational contract. We also predicted that accommodative HRM would relate to outcomes only when fulfilling specific needs of employees, associated with their selecting, optimizing, and compensating strategies. Results of a multilevel study among 1058 employees in 17 healthcare units fully supported our expectations regarding the role of the psychological contract. Additionally, we found support for the expected roles of selection and compensation, but not for optimization strategy. This study contributes to the literature by demonstrating that HRM relates to employee outcomes through multiple pathways, which can be either universal or contingent.     

车辆自动检测器测频系统设计

基于智能交通监控系统的发展需要,车辆检测器应用前景广泛。本文提出一种基于波频测量原理的车辆检测器设计,采用非接触式测量方法,测量核心采用一款SOC芯片,该SOC芯片采用欧比特公司的S698处理器作为内核,将集成双精度浮点处理器、AMBA2.0总线以及UART等一起集成在一个SoC芯片内片内。该系统的检测时间可以达到30ms以内,使得在检测到车辆后有充裕的时间进行相应的处理,经在FPGA中验证,效果完全符合设计要求。     

时变多普勒衰落信道硬件模拟的FPGA实现

针对不同散射环境下衰落信道具有不同的多普勒功率谱形状，提出了一种改进的复谐波叠加模型用于时变多普勒衰落信道的模拟，仿真分析了该方法输出信道衰落的幅值及相位连续性，并据此设计了基于FPGA硬件平台的时变多普勒衰落信道模拟器。硬件实测结果表明，该模拟器输出的时变多普勒功率谱与理论仿真非常吻合，可用于实际中多普勒功率谱实时变化场景的模拟。     

滁州市陆地生态系统土壤碳储量对土地利用变化响应

从土地利用变化造成的非建设用地土壤有机碳储量变化,及土壤有机碳储量对土地利用变化脆弱性评估两个角度,研究2005-2013年滁州市陆地生态系统土壤碳储量对土地利用变化响应。研究发现:(1)土地利用强度逐年增加,土地利用变化主要表现为耕地、林地、水域、建设用地的增加和其他用地的大幅减少。建设占用导致大量农用地发生非农转用,耕地保护形势日趋严峻。(2)2005、2009、2013年,滁州市非建设用地的中层土壤有机碳储量为13090.11t、12538.86t和12500.05t,呈现先快后慢的减少态势,这主要受草地碳储量减少速率影响;耕地、林地和水域的储碳量最高。(3)2005-2013年,土地利用变化对非建设用地土壤有机碳储量的潜在影响指数为-2.05,前后4年潜在影响逐渐降低,脆弱程度有所改善,但仍不理想,土地利用有待向更加低碳的模式转变。     

黑土农田自然恢复土壤有机碳的演变

Century模型是世界上用来预测土壤有机碳趋势的重要模型之一,近20年来在农林生态系统上得到了广泛的应用;运用该模型对黑土农田自然恢复条件土壤有机碳的变化进行了预测,结果表明:Century模型可以预测黑土农田自然恢复土壤有机碳的演变;自然恢复条件下,短期内已垦黑土农田有机碳水平略有下降,20年后开始缓慢上升。     

浅析安全操作平台中日志的过滤与范化

随着网络规模的扩大,多安全设备的统一管理问题进入人们的视线,安全运营中心(SOC)随之而生。文章简单介绍了SOC系统的工作原理,指出日志的预处理工作在整个系统中的重要性,从日志处理的角度对SOC的模块进行分类,并重点分析了关于日志预处理中用于去掉大量无用信息的过滤模块、用于将不同格式日志标准化、规范化的范化模块,提出切实可行的设计方案。     

Determining soil redistribution in Dian Lake catchment by com- bined use of caesium-137 and selected chemical properties

Recent development in the use of the environmental radionuclide caesium-137 for documenting rates and soil redistribution on the cultivated or uncultivated land and estimating rates of sediment deposition on represents an important advance that overcomes many of the limitations of the conventional techniques commonly applied in such investigations. A study on soil redistribution （including soil erosion and deposition） was carried out in the Dian Lake catchment, Yunnan Province, using ^137Cs and selected chemical properties. The average soil erosion rate was 1,280.2 t km^2 yr^-1. Soil erosion rate occurring on different parts of the slope was significantly different on different parts of the slope, increasing.from the top. the bottom to the middle slope. The average soil erosion rate is also different with the land use type and that of the cultivated land （1, 672. 8 t km^-2 yr^-1） is higher than oJ the uncultivated land （1.161.2t km^-2 yr^-1 ）. The result shows that landform, slope gradient and land use type are key factors that influence the size of soil erosion. In addition, we also find the SOC and TN contents and amount of the soil erosion to be correlated in the soil. With the soil erosion occurring, there are land degradation and the local eco-environmental problems, such as water eutrophication in Dian Lake.