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81.
INTRODUCTIONTherearemanymanufacturedtoolsandprod uctsfordailyusethatarefabricatedbyironsuchas:ironmongery ,ironplate,ironstrap ,ironwire ,ironstairsandotherironworks.Theseproductsimprovethelivingconditionsofourlife.Toachievethevarioususegoalsandgivespecia… 相似文献
82.
张红玲 《辽宁科技学院学报》2000,2(1):26-29
多线程随着Ｗｉｎｄｏｗｓ环境的使用逐渐受到软件开发人员的重视,工作者线程和用户界面线程是Ｗｉｎｄｏｗｓ环境下的ＭＦＣ支持线程 的两个不同类型,文章论述了利用Ｗｉｎｄｏｗｓ环境下的ＶｉｓｕａｌＣ＋＋４．１实现上述两类线程的方法。 相似文献
83.
张海鹏 《石家庄职业技术学院学报》2002,14(2):18-19,33
分析了在不同系统环境和应用需求条件下,WindowsNT网络操作系统的安装及系统维护方案,以NT4．0为核心提出在多种应用条件下的实用安装解决方案。 相似文献
84.
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
85.
This study compared leader behavior ratings of black and white Army infantry squad members serving in squads led either by black or white leaders. One black and one white squad member, chosen at random from each of 34 racially mixed squads, rated their leader's Consideration and Initiation of Structure behaviors (Stogdill, 1963), and their leader's behavior relevant to French and Raven's (1959) five bases of social power. In general, it was found that members who were of the same race as their leader rated him as significantly less likely to use punishment-related behaviors than did members who were of a different race than their leader. However, same-race members did not rate their leader's considerate or structuring behavior differently than did different-race members. The overall pattern of findings were discussed in terms of the leaders' implicit reliance on their punishment power to obtain compliance from different-race subordinates. 相似文献
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87.
As university involvement in technology transfer and entrepreneurship has increased, concerns over the patenting and licensing of scientific discoveries have grown. This paper examines the effect that the licensing of academic patents has on journal citations to academic publications covering the same scientific research. We analyze data on invention disclosures, patents, and licenses from the University of California, a leading U.S. academic patenter and licensor, between 1997 and 2007. We also develop a novel “inventor-based” maximum-likelihood matching technique to automate and generalize Murray's (2002) “patent-paper pairs” methodology. We use this methodology to identify the scientific publications associated with University of California patents and licenses.Based on a “difference-in-differences” analysis, we find that within our sample of patented academic discoveries, citations to licensed patent-linked publications are higher in the three years after the license, although this difference is not statistically significant. We then disaggregate our sample into (a) patented discoveries that are likely to be used as “research tools” by other researchers (based on the presence of material transfer agreements (MTAs) that cover them) and (b) patented discoveries not covered by MTAs. Citations to publications linked to licensed patents in the latter subset (not covered by MTAs) are higher for publications linked to licensed patents, and this difference is statistically significant. In contrast, licensing of patented discoveries that are also research tools is associated with a reduction in citations to papers linked to these research advances, raising the possibility that licensing may restrict the flow of inputs to “follow-on” scientific research. 相似文献
88.
为了提高摩托艇比赛计时系统的精确性和高效性,设计了一种电子计时系统,系统以单片机AT89C51为微控制单元,通过激光传感器,对激光进行感知,并将激光信号转化成电信号传递给单片机,系统设计了两种模式,一种是排位赛模式,第二种是竞速赛模式,分别编写了两套程序,单片机根据程序可以准确执行指令,实验表明,次电子计时系统大大提高了裁判的准确度,以及成绩编排效率,而且完全可以符合现有摩托艇的比赛规则。 相似文献
89.
我国学术期刊稿件的同行评审伴随着学术出版业的迅速发展和学术期刊的国际化进程而逐步发展起来。本文概要地梳理了近年来中国学术界对同行评审的有效性以及同行评审专家的职能定位等问题的研究,分析和探讨了中国学术期刊同行评审实践中存在的几个主要问题。 相似文献
90.