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1.
图论在社会科学领域有着广泛的应用,但论述不多。利用图论方法讨论会议议程安排的数学模型、可行条件、确定准则以及解决方法,进一步细化了图论应用。  相似文献   

2.
文中针对于运筹学基础及应用的教材上运用匈牙利法求解分配问题的过程做了改进,并举例说明了矩阵中没有独立零元素情况的具体处理办法.  相似文献   

3.
寻找独立0元素的一种新方法   总被引:1,自引:0,他引:1  
根据独立0元素在矩阵行和列中具有互斥性这一特点,提出了利用0元素在矩阵中的位置来判断其是否为独立0元素的对角线方法.  相似文献   

4.
该文对基于802.16d/e实现的MIMO-OFDMA系统模型的信道估计算法进行了研究,提出了已知信道估计设计的一种基于时-频域分析法的实现方案。在该方案下的性能可以作为衡量其它信道估计算法性能的一个参考基准,并根据OFDMA系统上行链路的导频分布特点,利用导频进行线性插值信道估计的LSE信道估计,测试结果表明无论对于何种情况,已知信道估计的都优干线性插值信道估计,SUI-1情况中当SNR大于7dB后,线性插值信道估计与已知信道估计的性能差距超过2dB,其它SUI情况性能差距不超过2dB。  相似文献   

5.
分别在平坦衰落和频率选择性衰落的无线信道模型中建立了基于多用户正交频分复用技术(OFDM)和分布式天线的认知无线电系统中子载波分配模型.该模型不再用"干扰温度"限制认知用户来保护主用户,而是规定主用户在其所有子载波上的吞吐量之和需要高于一定的门限.然后,根据不同信道模型的特点提出了最优子载波分配方案,该方案利用分支定界法和隐枚举法最大化系统的吞吐量.最后,利用Pegging算法提出了效率与公平折中的子载波分配方案.仿真证明,在不同场景中所提出的子载波分配方案与现有方案相比在吞吐量和公平性方面均具有较大的优势.  相似文献   

6.
简化匈牙利法求解的思考   总被引:3,自引:0,他引:3  
文章通过实证比较法,论证了简化匈牙利法求解的方法和步骤,使匈牙利法求解在实践中更为简捷.  相似文献   

7.
二次型化简可用配方法来实现,本文通过用矩阵体现配方运算,从而得到二次型化简的简便方法。  相似文献   

8.
This paper is about a research focusing on upbringing story problems of Hungarian. Sandor Karacsony's educational philosophy has already had several criticisms, primarily from the communist party's people, and from ideological and political viewpoints. But there were people blaming him for the deficiency of the concept and the lack of the pedagogic system. While studying and thinking his works, it might be declared that Karacsony's thoughts were embed in a peculiar system, revealing what must not be given up. Although, his language is slightly difficult, his direct style of writing brings learners through less understandable chapters and parts. The author grouped the overview of Karacsony's pedagogic system around 3 fundamental notions: the aim of the upbringing, the education and the theory of education. Sandor Karacsony was not only a high-school teacher and university professor, but also in his public functions, strived for restoring the relation between the educators and the pupils into a natural (for him) connection, he was out for developing tasks, expectations of the schools and the reformed institutions.  相似文献   

9.
数制的相互转换是学习计算机的重要基础内客.根据教学实践经验,分析了计算机教学中传统的数制进位原理和转换方法,创立了一种新的方法--抓药式配数法,它不仅能够为我们推介一种新颗的、极其有效的分析计算方法,更可以为我们提供解决类似或相关问题的一种思路.  相似文献   

10.
数学建模中的最优化理论探讨   总被引:1,自引:0,他引:1  
结合目前全国大学生数学建模的热潮,分析了数学建模的理论思想,提出了数学建模的本质特点实际就是一种最优化的思想。并且通过简单的例子探讨了用最优化的理论求解数学模型的方法。  相似文献   

11.
资源配置问题是经济学界长期关注的问题,也是一个古老而又永远年轻的永恒课题。资源的配置除了传统的“看不见的手”和“看得见的手”以外,还存在“第三只手”,即第三配置。传统资源配置问题的理论研究存在诸多不足,第三配置是在市场配置及其失灵、政府配置及其失灵以及资源配置问题上一直存在的二元式思维的缺陷这样一个历史背景下提出的。“第三只手”即第三配置的问题有许多专家涉猎过,实践上自古有之,在现代社会经济运行过程中,信用道德等作为调节社会经济运作的“第三只手”,一直在发挥重要的作用,弥补了政府干预与市场机制的缺陷,第三配置的研究有其理论与实践依据,它为资源配置问题的研究提供了一个新视角。  相似文献   

12.
从基于\"知网\"的句子相似度计算的角度出发,研究了文字类主观题批阅的自动阅卷系统,并用文中阐述的理论观点实现了这个系统,达到了预期的目标。  相似文献   

13.
利用Excel的强大功能,建立计算模型,可以快速实现辅助生产费用的分配。文章通过三个具体实例,详细地阐述了Excel在计划成本分配法、交互分配法、代数分配法中具体应用的方法,解决了既麻烦又低效的手工分配辅助生产费用的工作难题。  相似文献   

14.
约翰奈斯·勃拉姆斯(Johannes Brahms),德国著名作曲家,一生留下了许多传世之作。其中包括21首匈牙利舞曲,犹以升f小调第五号《匈牙利舞曲》最为著名。乐曲以严谨的复三部曲式结构,在特殊的创作背景下,忠实的继承了古典主义音乐的风格,又融入了匈牙利民族特有的音乐素材,特别是借用了吉普赛音乐的旋律,旋律粗犷豪放,节奏自由,是一首有创造性的、有个性的、有强烈民族情感和爱国思想的优秀作品。  相似文献   

15.
《匈牙利汉语课本》是匈牙利罗兰大学孔子学院在国家汉办支持下编写的一套国别化汉语教材。其出版模式是中外合编、国内排版、国外出版发行;在编写理念上,它以促进中匈文化的双向交流来展现国别化特色;在推广策略上,则尝试以编排的区分度提高教材的适用范围,建立使用者反馈机制来检验教材推广的有效性,并依赖孔子学院及孔子课堂在匈牙利各地推广教材。这种出版模式、编写理念及推广策略是国别化汉语教材的一种尝试,或可为国别化汉语教材立项与实践提供参考。  相似文献   

16.
    
End-to-end TCP(transmission control protocol)congestion control can cause unfairness among multiple TCP connections with different RTT(Round Trip Time). The throughput of TCP connection is inversely proportional to its RTT.To resolve this problem,researchers have proposed many methods. The existing proposals for RTT-aware conditioner work well when congestion level is low. However,they over-protect long RTT flows and starve short RTT flows when congestion level is high. Due to this reason,an improved method based on adaptive thought is proposed. According to the congestion level of networks,the mechanism can adaptively adjust the degree of the protection to long RTT flows. Extensive simulation experiments showed that the proposed mechanism can guarantee the bandwidth fairness of TCP flows effectively and outperforms the existing methods.  相似文献   

17.
INTRODUCTION In current Internet, most of traffic is generatedby traditional data transfer applications such asHTTP (hyper text transmission protocol), FTP (filetransmission protocol), or SMTP (small mailtransfer protocol). Usually, these elastic applica-tions are not sensitive to the delivery time of indi-vidual packet, but rather to the total transfer time ofthe data. They often use TCP, which provides re-liable end-to-end control over the “best-effort”service of IP. Beca…  相似文献   

18.
  总被引:1,自引:0,他引:1  
This paper examines the nature of the problems posed, the processes by which their solutions were made public, their structural contribution to a lesson and the opportunities they offered for the learning of mathematics in Budapest, Hungary. The problems were derived from observations, the processes of which were informed by various comparative studies, of 94 mathematics lessons in the 10–14 age range. Problems, the analysis and categorisation of which were informed by the literature, tended to fall into two categories – single response with high levels of cognitive demand and multiple response with high levels of cognitive demand. Structurally lessons fell into a well practised pattern of classroom behaviour. They began with a public review of homework, comprising two or three multiple response problems which were solved collaboratively. This was followed by a warm-up period involving the oral setting and mental solving of a few single response problems. Lastly, the main body of the lesson involved several cycles in which a multiple response problem was posed, attempted individually before solutions were shared publicly. Lessons ended with homework being set. The discussion of the findings is framed by Hungary's variable performance on recent international tests of mathematical attainment.  相似文献   

19.
光链路的偏振模色散效应已成为高速 /长距离的传统光时分复用系统和光副载波复用系统的严重阻碍。文章基于一阶近似 ,导出了光副载波系统中 ,偏振模色散效应引起的射频信号功率衰落的一般表达式。并且研究了几种偏振模色散抑制方法的优缺点 ,提出了一种全新的相干检测技术来提高补偿性能。  相似文献   

20.
我国中小学教职工编制管理现状呈现出管理权过于集中、虚超编、编制过紧、结构性缺编、有编不补、附加编制低、城乡标准不统一等特点和弊端。这导致了制约地方发展教育事业的积极性和创造性、广大中小学校无法补充新教师、部分学科教师紧缺、学校日程管理缺乏弹性、教师工作压力大、阻碍教师持续专业发展和教师人力资源配置低效等问题。对上述问题的破解,涉及到创新教师编制管理体制、提高编制标准、统一城乡标准、提高附加编制比例、杜绝“有编不补”、建立教师退出机制、深化学校后勤社会化改革、增设专业教师编制等一系列举措。  相似文献   

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