基于三项和五项本原多项式的自收缩序列

文章讨论二元域上由本原三项式和本原五项式生成的m-序列所导出的自收缩序列的周期和线性复杂度。     

TCP视频传输质量监控模型的研究

目前的网络视频传输质量监控模型大多是针对UDP的,而TCP视频传输质量监控模型的建立仍是一个待解决的问题。在基于MDI算法的UDP视频传输质量监控模型基础上,提出了能有效实时反应TCP视频传输质量的八个评估指标,并创建对应的监控模型进行文时指标计算。实验结果证明了该模型的可靠性和实用性。     

IDFC: A new approach to control bifurcation in TCP/RED

The main objective of this research is to analyze the bifurcation phenomenon in Internet congestion model for Transmission Control Protocol (TCP) with Random Early Detection (RED). This problem can be divided to many categories considering different viewpoints. Different approaches of modeling (continuous and discrete models) and various system structures (control in end node or routers) are some of these categories. The most significant method in control of such systems is Delayed Feedback Controller (DFC). In this paper, a discrete model is considered and a new algorithm Integral DFC (IDFC) is presented that has many preferences over similar algorithms, which are illustrated by simulation results and analytical discussions.     

太阳黑子活动周期特征的小波自相关分析

太阳黑子数是描述太阳活动水平的主要指标,太阳活动直接影响日地环境.依据前人对太阳黑子数的观测资料,采用小波分析和自相关相结合的方法,分析了1770-1869年的太阳黑子数年均值,得出了太阳黑子存在11-12年周期的结论;用该算法对噪声的鲁棒性进行了验证;结果表明该方法对研究太阳活动规律乃至天体规律是有效的.     

基于长定子齿槽的磁浮列车测速

磁浮列车测速定位传感器在实际运行时,会受到列车震动和长定子轨道的接缝等影响,并且轨道接缝的尺寸也不相同,使得位置传感器在通过不同轨道接缝的时候产生不同的信号畸变,导致牵引设备过流或过压保护甚至烧毁。为了能够适应不同的轨道接缝的影响,本测速定位系统采用了两路相对位置传感器,应用自适应滤波和周期预测的方法,设计了一种自适应预测滤波器,通过周期预测方法将预测值与实际观测值进行比较,选择与预测值相近的传感器信号。通过提取两路传感器中的正确信号,实现了传感器的冗余处理,列车实际运行实验验证所提出方法的正确性。     

丁玲的转型——论丁玲延安时期作品风格的转变

丁玲延安时期的转型,表现在文本中,是文学风格的转变。文学作品的风格是作家创作个性在一系列作品中所表现出来的鲜明的艺术特色,包括作家的风格和作品的风格。一般来说,一个作家的作品风格是一致的,是贯通的,而丁玲作品的风格却在延安时期出现了和早期截然不同变化,标志着丁玲从早期的一个纯粹追求艺术个性的作家在延安时期转型为一个国家摇旗呐喊的革命者。     

焦炭分析基水分测定方法的改进探讨

通过试验和数理统计分析,对焦炭分析基水分的测定方法进行了改进,并取得了一定的成效.     

Development of integrated automatic diagnosis method for loose parts monitoring system

Generally, it is known that loose parts in the reactor coolant systems (RCS) bring serious damage into the system components and impede the normal function of the system. So, it is necessary to rapidly respond when the impact event has occurred. This paper presents a realization of automatic diagnosis algorithm for LPMS (Loose Parts Monitoring System) and application results to the impact test data at YongGwang Nuclear Power Plant Unit 3 (YGN3), Kori Nuclear Power Plant Unit 4 (KNU4) and the real data at YongGwang Nuclear Power Plant Unit 1 (YGN1). The integrated diagnosis algorithm is composed of three parts; prefiltering, impact location and mass estimation. The prefiltering is needed to reject low frequency background noises. To estimate the impact location, the starting points of impact are detected from the filtered signals and compared to produce the time differences, and then the modified triangular method is applied. To estimate the mass and energy of a loose part, we automatically compute the maximum amplitude and the initial half period. Additionally, a modified impact theory considering amplitude and energy attenuation effects is applied.

To show the effectiveness of the proposed diagnostic method, the real impact test data at YGN3, KNU4 and the real impact data at YGN 1 is used. The analysis results show that the location estimation error is on average below 7.5%, and the average mass estimation is within 40%.     

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吐哈盆地是一个陆相的前陆盆地，构造较复杂，沉积多旋回。运用高分辨率层序地层学理论和方法可将侏罗系划分为7个层序，断层、储集层和层序界面组成了台北凹陷侏罗系的油气输导体系。储集层主要发育在层序SQ₁、SQ₂、SQ₃、SQ₄和SQ₅的基准面上升半旋回中，SB₁、SB₂、SB₃、SB₄和SB₅层序界面可以作为油气横向运移的优势通道。侏罗系输导体系对台北凹陷油气田（藏）的分布有明显的控制作用，输导体系附近是进一步寻找油气藏的有利部位。     

大弹体转动惯量测量仪的设计

激光炸弹转动惯量的测量采用金属扭杆扭振法，按时问序列进行测量，采用光电计时，由89c52和8254组成数据处理电路，外部测量信号以外部中断方式触发89c52读取8254计数，基本算法是通过测量转台空转周期及样柱与转台的共摆周期，标定测量仪的转台转动惯量和测量仪的标度系数，可同时导出炸弹与转台的共摆周期和阻尼比，针对大噪声和干扰环境，采用阻尼比淘汰和Y0淘汰两种改进算法，仿真表明结果满意。