文件系统面面观   总被引：1，自引：0，他引：1  

蔡永华  石金芝 《承德师专学报》2003,23(2):12-13

我们在新硬盘上安装操作系统,首先要进行分区、格式化,然后才能安装。在这个过程中,通常要面临采用哪种文件系统的问题,也就是说,如何设置文件系统在某种程度上决定了安装的操作系统可以发挥的性能。文件系统就是硬盘存储信息的格式,各种文件系统都有其相应特点。FAT16文件系统是早期PC机使用的文件系统,支持的最大分区较小,且空间的利用律相当低;FAT32是FAT16的增强版本,在以上两方面都有很大的增强,减少了计算机系统崩溃的可能性;NTFS文件系统是一个基于安全性的文件系统,支持其它所有的文件系统,在同样大的分区中,空间利用率有了很大提高。  相似文献   

杂交水稻苗期生长与~(32)P~(14)C在分蘖的分布     

王永锐  陈坤朝  何文珊  邓政寰 《中山大学学报论丛》1989,(5)

用放射性同位素示踪技术,测定早、晚季10多个杂交水稻及其亲本中~(32)P、~(14)C在分蘖的分布(％),并统计其分蘖数量与~(32)P、~(14)C的相关性。结果表明,多数杂交水稻的分蘖数量与~(32)P在分蘖的分布(％)呈显著或极显著正相关,而与~(14)C也呈正的相关性;杂交水稻的生长势(苗高、苗重、根长、根重),普遍比亲本和“双桂36”好;光合强度和根的呼吸强度,除L301A×R29以外,其余均较高。还讨论了杂交水稻分蘖力,分蘖数量与谷粒产量的关系,以及~(32)P、~(14)C在分蘖分布(％)作为预测杂种优势的可能性。  相似文献   

Turning scientific and technological human capital into economic capital: the experience of biotech start-ups in France     

Catherine D.F. Corolleur 《Research Policy》2004,33(4):631-642

This paper examines how scientific and technological (S&T) human capital is transformed into financial capital through the creation of firms by scientists. The analysis is based on a database describing the positions held by 132 founders from 62 French biotech SMEs. It shows that star scientists engage in highly risky but also valuable firms. Less famous scientists must develop their human capital rather than valorising a stock. The paper concludes by pointing to three paradoxes concerning the commitment and compensation scheme of star scientists and the managerial position of less known scientists.  相似文献   

PXE在高校机房中的应用     

廖震宇  赵光 《保定师专学报》2011,(3):88-91

结合GhostCast Server和Tftpd32程序,讨论PXE工作原理,实现基于PXE的网络克隆的功能.  相似文献   

实现Authorware与MCS-51系列单片机的多机通讯     

谢东力 《大众科技》2008,(2):59-60

通过实例详细介绍了Authorware与单片机进行多机通讯的原理和方法，既有硬件原理图，又有程序清单，具有一定的实用价值．  相似文献   

基于STM32F0xx的智能温湿度控制器的设计     

李曙光  刘逸凡  张旭  周瑞敏 《环球赛鸽科技》2015,(19)

介绍了一种基于STM32F0xx的智能温湿度控制器的设计方法及功能实现;该控制器可实现控制柜内温湿度控制和控制柜内外温湿度显示。  相似文献   

基于STM32的太阳能自动寻光系统     

彭涛  魏文彬  黄长新  黄喜军 《大众科技》2015,(6)

文章中系统基于STM32芯片,设计并制作了一个用于精确跟踪太阳并收集能量的系统。系统由STM32F103ZET6最小系统、光信号采集转换卡、追踪太阳部分、电压采集等几部分组成。该系统通过光信号采集转换卡感知太阳位置,同时采用跟踪算法增强稳定性,实现精确跟踪。为了便于携带,整体结构设计为可拆卸的装置。选用了大容量的锂电池作为蓄电池,可以极大的解决当前多种数码产品的充电问题。  相似文献   

基于STM32微处理器的压蜡机自动控制系统     

江兴海  陈长杰  董学良  丁金华  王德权  高腾  郁玲 《黑龙江科技信息》2015,(6)

采用嵌入式微处理器STM32控制板和MCGS触摸屏完成了压蜡机控制系统。实现了对压蜡机的开合模控制、压蜡控制、保压控制、补蜡控制和顶模控制。上位机MCGS触摸屏设有定时参数的输入和压蜡机的运行状态动画显示。下位机负责传感器信号的检测、缸体电磁阀信号的输出及各定时控制;信号的输入输出采用了光电隔离电路。上下位机采用基于MODBUS协议进行通信。  相似文献   

Multinational subsidiary knowledge protection—Do mandates and clusters matter?     

Wolfgang Sofka  Edlira Shehu  Pedro de Faria 《Research Policy》2014

International knowledge spillovers, especially through multinational companies (MNCs), have recently been a major topic of academic and management debate. However, most studies treat MNC subsidiaries as relatively passive actors. We challenge this assumption by investigating the drivers of knowledge protection intensity of MNC subsidiaries. We argue that knowledge protection intensity is determined by MNC subsidiary mandates and by opportunities and risks originating from the host region. We hypothesize that not just competence-creating but also competence-exploiting mandates increase knowledge protection intensity. In addition, technological cluster regions in the host country can be expected to provide opportunities for knowledge sourcing and MNC subsidiaries may be willing to protect knowledge less intensively to participate in cluster networks. We test our hypotheses using a dataset of 694 observations of 631 MNC subsidiaries in Germany and develop recommendations for research, managers and policy makers.  相似文献   

Contests for cooperation—A new approach in German innovation policy     

Alexander Eickelpasch  Michael Fritsch 《Research Policy》2005,34(8):1269-1282

A new approach in German innovation policy organizes contests of proposals for developing innovation networks. Based on an overview of the different programs, we investigate the advantages and problems of such an approach. We find that this type of policy may have a relatively large impact and can, therefore, be regarded as a rather efficient instrument of innovation policy. Compared to conventional policies, administration of the program is a much more critical issue. The contest approach may stimulate learning effects on the side of the administration but may also require a high degree of flexibility. The main disadvantage is the additional time that is required for conducting the contest. As a distinct ‘picking the winner’ approach, the contest approach is not suited as a means for achieving a leveling-out of regional welfare.  相似文献