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Our article mainly discussed the preparation of entangled states and the application of entangled states in quantum communication, including practical scheme for remote state preparation of a photon-photon entangled state, generation and concentration of multi-atom entangled states, practical protocol for telecloning quantum states and protocol for multi-party superdense coding by using multi-atom in cavity QED.This article has several objectives.

本文主要研究了量子纠缠态的制备及纠缠态在量子通信中的应用，包括远程制备光子-光子纠缠态，产生和浓缩多原子纠缠态，利用纠缠态进行远程克隆以及通过腔QED实现多组份密集编码的方案。

Multi-point forming experiments of titanium cranid protheses show that precision of the workpiece is improved significantly via the closed-loop multi-point forming method. And precision digital forming for sheet metal parts is accomplished based on multi-point forming techniques and rapid laser scanning measurement.

结果表明，基于快速测量的曲面多点成形精度控制技术充分利用了多点成形的快速性的特点，通过三维空间形状反馈，来提高多点成形的精度。

According to the function of distributed emulator, optical information processing and image multi-object tracking system, the following three aspects were emphasized in this dissertation. Firstly, a vast virtual terrain, ground radar models and canyons were created for the distributed emulator with modeling software Creator. The radars were driven to scan during emulating and the real time terrain code was sent to Radar module. Secondly, an optics channel simulating the optics camera of a virtual aircraft was implemented with simulating software Vega. The 2-D information got from the channel was translated and sent to multi-sensor information fusion system as an optics information source. Thirdly, the dissertation studied some motion estimation methods and analyzed the factors which influence the speed and the precision of the block matching algorithms. Then an improved block matching method was proposed for image multi-object tracking system and applied in the system combined with frame difference method.

论文根据多传感信息融合实验系统中的分布式飞行仿真系统、光学信号处理器和图像多目标跟踪系统三个子系统的功能要求，具体完成了以下三方面的工作：首先利用建模软件Creator创建分布式飞行仿真系统中的大面积地形、场景中的地面雷达模型和峡谷地形，并在仿真过程中实时驱动雷达模型的扫描，同时为后续雷达仿真模块提供实时地形编码；其次利用仿真软件Vega，在分布式仿真系统中为光学信号处理器设计实现了光学通道，模拟飞行器的光学摄像机的功能，并且对由此通道获得的目标二维光学信息进行转化处理，作为光学信息源发送给后续的多传感信息融合器；最后针对图像多目标跟踪系统，在研究图像分割运动估计算法的基础上，通过分析影响块匹配算法速度和精度的因素，改进了块匹配运动估计算法，结合差分法可应用到目标跟踪系统中。

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。

I aimed at the use of "theory - in practice - theory - and then to guide practice" of research, by studying the history of international and domestic mergers and acquisitions, corporate restructuring at home and abroad the successful experience of the railway, using SCP theoretical analysis of the railway multi-enterprise status and future prospects for reorganization The article is expected to address the future of the railway company's strategic reorganization of multi-mode and performance problems, to choose the actual strategy of the railway restructuring of diversified business model, through re-expand the enterprise scale, increase market concentration, enhance core competitiveness, improving railway multi-enterprise performance.

偶自己旨在运用&理论—实践—理论—再指导实践&的研究方式，通过研究国际国内的并购历程、国内外铁路企业重组的成功经验，运用S-C-P理论分析铁路多元企业的现状和未来重组的陌景，文章预期解决铁路多元企业未来的战略重组模式和绩效问题，选择符合铁路多元企业实际的战略重组模式，通过重组扩大企业规模、提高市场集中度、提高核心竞争力，提高铁路多元企业的绩效。

I aimed at the use of "theory - in practice - theory - and then to guide practice" of research, by studying the history of international and domestic mergers and acquisitions, corporate restructuring at home and abroad the successful experience of the railway, using SCP theoretical analysis of the railway multi-enterprise status and future prospects for reorganization The article is expected to address the future of the railway company's strategic reorganization of multi-mode and performance problems, to choose the actual strategy of the railway restructuring of diversified business model, through re-expand the enterprise scale, increase market concentration, enhance core competitiveness, improving railway multi-enterprise performance.

本人旨在运用&理论—实践—理论—再指导实践&的研究方式，通过研究国际国内的并购历程、国内外铁路企业重组的成功经验，运用S-C-P理论分析铁路多元企业的现状和未来重组的前景，文章预期解决铁路多元企业未来的战略重组模式和绩效问题，选择符合铁路多元企业实际的战略重组模式，通过重组扩大企业规模、提高市场集中度、提高核心竞争力，提高铁路多元企业的绩效。

But it can only be used when each of evidence is independent, in practical applications there are many evidences can not satisfy this condition, so how to improve this theory has become to a focus problem; More over, multi source information fusion needs data of multi platform, so how to unify data of multi platform to the same time space so as to fuse is an important factor influencing the performance of fusion.

但D-S理论只适用于证据独立的情况，实际应用中往往需要处理不独立的情况，因此对证据理论的研究和改进是摆在众多学者面前的一个重点问题；另外，多源信息融合要利用多平台信息，如何将各传感器信息统一到同一的时间空间范围内进行融合是关系到融合性能的一个重要因素。

In order to coordinate with the model experiment of rotor, three rotor temperature measurement systems are developed in the paper. System No.1 transfers temperature signal through slip rings. Multi-channel switch circuit is installed on the rotor and changes multi-channel input into one-channel output, thus multi–channel temperature signal can be transferred through less slip rings than the common solution.

为了配合转子模型的实验工作，本论文研发了三套转子测温系统：第一套是通过滑环传递温度信号的测温系统，转子上安装多点信号切换装置，将多路信号输入变为选通的一路信号输出，可以利用较少的滑环传递多路信号。

Finally, by the deposit welding experiments of a single-track and multi-layer part and a multi-track and multi-layer part, the test results show that the measures are effective.

进行了单道多层和多道多层的堆焊试验，试验证明所提出的方法有效。

The results show that multi-lever and multi-strand horizontal submerged jets are a new energy dissipation type and have better stability of flow patter,lower velocity in the slab and higher dissipated energy rate than the single-lever and the multi-strand horizontal submerged jets.

研究表明，多股多层水平淹没射流较单层多股水平淹没射流流态稳定性好、临底流速低、消能率高，是一种高效的新型消能方式。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。