优

By using a super high-yielding hybrid rice combination Liangyoupeijiu, its male parent 9311, female parent Pei'ai 64S and a three-line hybrid rice combination Shanyou 63 as experimental materials, the techniques of an artificial reaction system for photosynthetic membrane, and 32Pi isotopic labeling and so on, were used to study the photochemical activities of the flag leaf sheathes for Liangyoupeijiu.

以超级杂交稻两优培九及其父本9311、母本培矮64S和三系杂交稻组合汕优63为研究材料，采用光合膜人工反应体系和32Pi同位素标记等技术，初步研究了超级杂交稻两优培九剑叶叶鞘的光化学活性。

In addition, comparing the differences between the performance of the students which en- wiled and not enrolled the class for the gifted in language and social science one year later, it also found the performance of the students which enrolled the class for the gifted in language and social science has significant difference (p .05) than those who not enrolled this class in pans of academic scores, special performance, reading habit, caring about the news, extra-class enrichment, social service, and critical thinking ability, and showed the validity of identification.

此外，针对录取与未录取人文社会资优班学生在校学习一年后的表现进行比较发现，录取人文社会资优班之学生无论在部分学期成绩、竞赛发表等特殊表现、阅读习惯与时事了解、课外学习与充实、社会关怀与服务以及批判思考能力上，都显著优於未录取之学生〈p.5 ，呈现鉴定之有效性。

This thesis applies factor analysis in ship type optimization and uses this method to comprehensively grade the alternative ship types of second Carriage iron ore shipment from Majishan to Bao steel and finally gets the optimal ship type for this line.

本论文主要内容包括：第二章主要分析了国际铁矿石运输现状；第三章介绍我国进口铁矿石的情况，分析了我们铁矿石运输存在的不足并预测了发展趋势；第四章介绍了传统的船型论证方法、步骤；第五章计算了从马迹山到宝钢原料码头的船型方案的主要指标，并用传统的方法做了船型方案的选优；第六章介绍了因子分析法在船型论证中的应用，并用因子分析法对船型选优做了综合评定，得出适合马迹山到宝钢的二程矿石运输的最优船型。

When the rotational speed difference between the flywheel and clutch disk plate is small enough, that is to say, the rotational speed difference between the flywheel and clutch disk plate is smaller than what is set in advance, the flywheel and the clutch disk will engage as quickly as they can. So the shock intensity and slipping friction work are all very small when the clutch engages with the flywheel.

在E.T.Driver输出驱动扭矩小于阻力扭矩时，采用基于最小值原理的换档控制策略对滑摩功和冲击度进行综合最优控制，使滑磨功和冲击度达到综合最优，并得到了以解析式形式表达的系统最优控制函数。E.T。

Meanwhile, the experiments show that the approximate global minimum partition of the coarsest graph may be the local minimum partition of the finest graph and we need to strengthen the global search ability of refinement algorithm in the refinement phase.

同时实验数据也反映了在最小图上的全局近似最优剖分可能是初始图的局部最优剖分，需要加强多水平优化阶段的迁移优化算法逃离局部最优的能力。

The solution of the optimal 3-impulse rendezvous is a multi-variable iteration process. For the 3-impulse rendezvous with terminal coastings, the symmetry characteristic of optimal 4-impulse rendezvous was applied to reduce the number of the iteration variables to save the calculation consumption.

三脉冲最优解的求解采用多变量迭代的方法；对于存在端点滑行段的三脉冲最优解的求解，利用四脉冲最优解的对称性，减少迭代变量的数量，降低了计算量。

The algorithm firstly uses some robust techniques to construct an inliers set of matching points. Then it takes the epipolar distance as the optimal criterion and search optimal subset in the inliers set under the greedy strategy. Finally, the fundamental matrix is calculated with the optimal subset.

利用各种鲁棒技术获得内点集，以点到极线的距离作为最优量度标准，采用贪心策略在内点集中寻找最优子集，并利用最优子集来计算基本矩阵。

Based on the optimal filters, various recursive algorithms of the optimal smoothing estimation under white-noise condition are derived, and problems of reducing storage requirements and computational load for the fixed-interval smoothers are discussed, moreover, optimal smoothers under various noise conditions are proposed, thus, the optimal state smoothing theory is founded.

在最优滤波算法的基础上，本文推导出白噪声情形下的状态最优平滑估计的各种递推算法，讨论了减少固定域平滑的存贮空间和提高运算速度问题，并提出了在多种噪声条件下的平滑估计方法，从而建立了这类系统的状态最优平滑估计理论。

Based on this, aim at the disadvantage on Wigner Distribution and Fractional Fourier Transform that can't restrain noise interference effectively when be used to detect Linear Frequency Modulated signals interfered by heavy noises, we proposed a improved WD. Simulation results show that this method can restrain noise interference effectively and improve the ability of LFM signals detection. On the other hand, in multi-component cases, WD suffers from the cross-terms, which may impair some of the auto-terms. In order to separate original multi-component signals into components and reconstruct them separately, we can use the method of optimal filtering in fractional Fourier domain. But this method also has a problem that if signals have aliasing in the fractional Fourier optimal domain as well, the reconstructed signals will be distorted. In this thesis, a novel method of quasi Fourier transform is proposed in order to solve the problem of multi-component signal reconstruction, and have good results.

在此基础上，针对Wigner分布和分数维傅里叶变换在处理高噪声背景下线性调频信号检测的问题时存在不能有效抑制噪声干扰的缺点，提出了改进Wigner分布的办法，该方法能够抑制噪声，提高信号的检测能力；针对Wigner分布在处理多分量非线性调频信号时存在干扰项的缺点，以及分数域最优滤波方法在处理多分量非线性调频信号分离重构问题时存在的局限性，该局限性表现为在对最优分数域上也有信号分量重叠的情况进行处理时重构信号发生畸变，提出了新颖的类傅里叶变换的方法，该方法对在最优分数域上也有信号分量重叠的情况也能处理，得到的重构信号失真很小。

The results showed that, on code evaluation performance, the effect of self-explanation was not significant between groups, but high prior knowledge learners outperformed low prior knowledge learners. On code generation performance, the guiding-question group outperformed the principle- prompt group and the control group. And the high prior knowledge group scored significantly higher than the low prior knowledge group. Finally, on the analysis of attitudes toward self-explanation activities, the guiding-question group showed more positive acceptance than the principle-prompt group.

研究结果发现：(1)在程式评估问题上，自我解释学习活动对学习成效没有显著影响，但高先备知识组则显著优於低先备知识组；(2)在程式设计问题上，问题引导组显著优於其余二组，高先备知识组亦显著优於低先备知识组；(3)在学习态度方面，问题引导组对自我解释学习活动的接纳程度和学习成效的看法上，皆显著高於原则提示组；两组对自我解释学习活动难度的看法则无显著差异。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。