延迟非时变系统史密斯补偿控制算法的实现

将PID控制与SDT预估控制相结合，结出了一种适用于大的纯滞后系统的控制算法．该算法鲁捧性强，结构简便，易于实现．     

一种基于DCT域与图像置乱的数字水印算法研究

提出了一种将水印图像进行Arnold置乱后嵌入到经DCT域进行变化的载体图像中的数字水印算法。算法研究结果表明水印具有较好的不可见性及健壮性。同时,文中采用不同图像处理方式对嵌入水印后的图像进行了攻击实验,实验表明该算法对于JPEG压缩具有较好的鲁棒性。     

军用飞机着陆灯专用电源设计方案和理论研究

10 0 0 W军用飞机着陆灯的灯丝是一种非线性时变电阻 ,冷电阻极小 (0 .0 4Ω左右 ) ,工作几秒钟后才能达到额定阻值 (0 .9Ω ) ,在对该灯进行老炼及检测时 ,如何仿真飞机着陆时迅速点亮的实际情况 ,是设计这种专用电源的一大难题。本文运用非线性时变电阻理论和金陵职业大学电源专利技术 ,成功地解决了这一难题     

Conditional inference and advanced mathematical study

Many mathematicians and curriculum bodies have argued in favour of the theory of formal discipline: that studying advanced mathematics develops one’s ability to reason logically. In this paper we explore this view by directly comparing the inferences drawn from abstract conditional statements by advanced mathematics students and well-educated arts students. The mathematics students in the study were found to endorse fewer invalid conditional inferences than the arts students, but they did not endorse significantly more valid inferences. We establish that both groups tended to endorse more inferences which led to negated conclusions than inferences which led to affirmative conclusions (a phenomenon known as the negative conclusion effect). In contrast, however, we demonstrate that, unlike the arts students, the mathematics students did not exhibit the affirmative premise effect: the tendency to endorse more inferences with affirmative premises than with negated premises. We speculate that this latter result may be due to an increased ability for successful mathematics students to be able to ‘see through’ opaque representations. Overall, our data are consistent with a version of the formal discipline view. However, there are important caveats; in particular, we demonstrate that there is no simplistic relationship between the study of advanced mathematics and conditional inference behaviour.

汉语语言形式中的民族时空观--汉语时间表达中的空间隐喻

认知语言学认为时间概念是由空间概念隐喻而来，“自我在动／时间在动”的空间隐喻是许多语言所共有的。文章以汉语时间表达的空间隐喻为语料，发现汉语较多使用“时间在动”的隐喻，为这一普遍性提供了佐证。同时发现“自我在动／时间在动”的隐喻不能完全解决汉语中一些时间表达的矛盾。     

Homeschool background,time use and academic performance at a private religious college

We study the effects of homeschool background and time use on academic performance among students at Patrick Henry College, a private religious institution with a 63-credit core classical liberal arts curriculum. Using ordinary least squares regression analysis, we examine four research questions: (1) Does time use influence academic performance? (2) Do homeschooled students perform differently than traditionally schooled students? (3) Does parental education moderate the impact of homeschooling on academic performance? (4) Does homeschooling moderate the impact of ACT scores on academic performance?     

一类s-组合Petri网模型及其结构分析研究

基于Petri网模型建立了一类串行加工系统的s-组合Petri网模型。通过引入潜在死锁圈概念对s-组合Petri网结构性质进行分析，给出了系统死锁存在的充分必要条件。     

有关运动时钟延缓的一些认识

在洛沦兹坐标变换的基础上，对时间延缓的相关问题进行了探讨。并提出了速度不变原理。     

可控随机非完整Hamilton系统的矩稳定

研究了可控随机非完整Hamilton系统的矩稳定性的条件，通过恰当地选择控制参量u，从而使系统满足稳定性条件，首先，给出可控随机非完整Hamilton系统的运动方程和平衡方程，然后，讨论了可控随机非完整Hamilton系统的均值稳定性的条件。     

破产分布及其方程

In this paper, the ruin distributions were analyzed, Including the distribution of surplus immediately before ruin, the distribution of claim at the time of ruin, the distribution of deficit, and the distribution of surplus at the beginning of the claim period before ruin. Several Integral equations for the ruin distributions were derived and some solutions under special conditions were obtained.