基于FPGA的液流电池管理系统的设计     

荣肖炜  解大  李峰 《环球赛鸽科技》2014,(28)

本文提出了适用于液流电池的电池管理系统的整体设计方案。给出了基于FPGA设计的四通道电压同步采集电路、温度采集电路、通信电路及控制接口的设计方法。该系统能够实现单体电池电压、总电压、电流、温度的检测,具有绝缘检测、故障保护、通信等功能。  相似文献   

财政科技资金投入企业后的流动轨迹研究     

杨海燕 《环球赛鸽科技》2014,(28)

随着企业是技术创新主体地位的不断强化,财政科技资金投入企业的比重不断升高,投入后的管理成为科研项目管理中的一个难点。本文通过对财政科技资金投入企业的方式、特点,以及企业会计记帐、核算和处理方式的系统分析,形成了财政科技资金投入企业后的流动轨迹,为有效判定资金使用的规范性和问题易发点提供了依据和线索。  相似文献   

Studying new forms of participation and identity in mathematics classrooms with integrated communication and representational infrastructures     

Stephen J. Hegedus  William R. Penuel 《Educational Studies in Mathematics》2008,68(2):171-183

Wireless networks are fast becoming ubiquitous in all aspects of society and the world economy. We describe a method for studying the impacts of combining such technology with dynamic, representationally-rich mathematics software, particularly on participation, expression and projection of identity from a local to a public, shared workspace. We describe the types of mathematical activities that can utilize such unique combinations of technologies. We outline specific discourse analytic methods for measuring participation and methodologies for incorporating measures of identity and participation into impact studies.

Stephen J. HegedusEmail:

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当前我国物流产业存在的问题及对策   总被引：1，自引：0，他引：1  

GAO Xiang-qing  高想清  段海燕 《孝感职业技术学院学报》2007,10(1):89-91

当前我国物流产业存在的主要问题是:物流职能分散,运作效率低;缺乏协同竞争,第三方物流市场薄弱;缺乏先进管理,物流信息化滞后;物流理论研究滞后,物流人才紧缺;传统物流核算掩盖了物流成本的真面目。解决这些问题的对策是:加快物流学科建设,建立物流标准化体系;创造现代物流环境,提高物流绩效;加快物流设施建设,改善物流管理技术;缔结物流战略联盟,构筑一体化物流战略;开拓全球性物流,寻找全球性物流空间等。  相似文献   

The dynamic power management for embedded system with Poisson process     

CHEN Tian-zhou  HUANG Jiang-wei  DAI Hong-jun 《浙江大学学报(A卷英文版)》2005,6(Z1)

The mass of the embedded systems are driven by second batteries, not by wired power supply. So saving energy is one of the main design goals for embedded system. In this paper we present a new technique for modelling and solving the dynamic power management (DPM) problem for embedded systems with complex behavioural characteristics. First we model a power-managed embedded computing system as a controllable Flow Chart. Then we use the Poisson process for optimisation, and give the power management algorithm by the help of Dynamic Voltage Scaling (DVS) technology. At last we built the experimental model using the PXA 255 Processors. The experimental results showed that the proposed technique can achieve more than12％ power saving compared to other existing DPM techniques.  相似文献   

海上低渗透互薄层油藏水平井限流法压裂射孔参数的优化     

徐康泰  李江飞 《温州职业技术学院学报》2020,(1):62-66

随着海上低渗透互薄层油藏的开采,水平井限流法压裂技术成为此类储层有效开采的主要手段之一。考虑孔眼磨损及裂缝内压降对流量分配的影响,建立多裂缝扩展的流量分配数学模型;以Palmer拟三维水力裂缝扩展模型为基础,完成考虑流量分配的海上低渗透油藏水平井限流法压裂多裂缝三维扩展数值模拟研究,结果显示:优化方案突显了预期的裂缝改造规模。  相似文献   

基于知识管理的数字化网络学科教学资源建设初探   总被引：1，自引：0，他引：1  

李端强  李志银 《广东技术师范学院学报》2006,7(4):111-114

精品课程建设是高等教育改革与发展的需要,它是一项系统综合工程,涉及到师资、学生、教材、教学思想、教学管理、教学方式、教学内容、教学手段等方方面面。本文基于知识管理的思想,针对目前精品课程使用不尽人意的现状以及在建设过程当中存在的一些问题,对基于知识管理的思想与方法建立应用型网络学科教学资源的策略与初步方案进行了探讨。  相似文献   

配电网潮流计算算法的研究   总被引：2，自引：1，他引：2  

陈海荣  邱家驹  包应时 《金华职业技术学院学报》2002,2(2):3-4,39

浙江大学电气工程学院教授，31~37杭州市  相似文献   

Towards an understanding of flow and other positive experience phenomena within outdoor and adventurous activities     

Margaret R. Boniface 《Journal of Adventure Education & Outdoor Learning》2013,13(1):55-68

Abstract

In considering what draws people to become involved in adventurous activities, studies on flow suggest that people are motivated to participate because of the intrinsic feelings of enjoyment, well-being and personal competence that they experience. This paper explores the positive experience phenomena termed peak experience, peak performance and flow. Similar and distinctive characteristics are identified, and factors influencing the ability to experience such peak moments are considered. A state of flow, which appears to hold the most relevance for adventurous activities, is explored in greater detail and considered in the light of The Adventure Experience Paradigm. Csikszentmihalyi's flow models are outlined and examined with particular reference to perceived levels of challenge and skill. It is suggested that an insight into the nature and characteristics of such optimal experiences can contribute to our understanding of why adventurous activities are intrinsically motivating. Such an understanding can assist practitioners in enhancing the learning experiences and opportunities for development of each individual participant.  相似文献   

重庆水陆码头的整治与城乡物资交流——以西南军政委员会时期为研究对象     

龚义龙 《四川三峡学院学报》2013,(6):34-38

发展城乡互助、促进内外物资交流是西南军政委员会与重庆市政府采取的恢复和发展经济的一项重要措施。解放初期,重庆水陆码头和市场秩序混乱、交通受阻,这些情况严重影响了城乡物资交流,市场一度呈现萧条停滞状态。西南军政委员会和重庆市政府采取有力措施,整顿市场和水陆码头、改造棚户区,为城乡物资交流畅通创造了条件,从而促进了解放初期当地经济的恢复与发展。  相似文献