外场

A off-line real-time cameral control method is proposed in this paper, which can stretch image contrast and enhance SNR. Benefit from the control method, following work, such as detecting, identifying and tracing are easy. Because of the small size, the system is easy to carry and is suit for open country use.

本文提出的相机控制系统克服了传统相机控制的缺点，可以脱离计算机进行实时控制，并对图像进行能量累积，提高图像的信噪比，可以更好地实现下一步的检测、识别和跟踪处理，而且该系统体积比较小，方便携带，适宜外场工作。

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下，GSC－SSF方法还可以提高阵列的虚拟孔径，从而提高估计的性能；可以证明，Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似； 3、提出了二维GSC－SSF方法和宽带谱相关DOA矩阵方法，利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题，并具有阵元数少、计算量较小的特点； 4、提出了时频子空间拟合和宽带时频DOA估计算法，将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中，利用时变滤波实现信号选择性测向和干扰抑制，特别适合于谱时变信号；可以证明传统特征结构法可看作是时频子空间拟合方法的特例； 5、提出了多用户环境下阵列响应的估计方法——CARE方法，该方法对信号结构和传播参数（主要是散射源分布与角度散布）的约束较少，适用于各种几何结构的阵列甚至未校准的阵列，能够直接得到阵列响应的闭式解，因此计算量小、稳健性好，不存在收敛问题； 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案，通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束，并保证各波束内的用户信号各不相同且相互干扰最小；其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点，其有效性已得到外场实测数据的证实。

An outfielder's empirically based "theory" of missiles is reminiscent of the latter stages of Ptolemic epicyclic models.

一个棒球外场手，他那种基于经验所形成的空中飞行物的&理论&，其实就很像托勒密本轮模型的后期阶段。

Mr. McGowan was also striving to catch the bright smiles tossed about by Rosy. But he was no out- fielder as Ikey was; he picked them off the bat.

迈高万先生也努力捕获罗西抛出的明媚笑容，但是他不像艾奇是外场手，他立刻拾起了它们。

The laminate composites with magnetic and ferroelectric pieces show the high magnetoelectric coupling coefficients at the appropriate coupling model of applied field.

将磁性和铁电材料进行层状复合，选择合适的外场耦合模式，得到了高磁电耦合系数的复合材料。

Shearing force can induce molecular orientation with different mesomorphic behaviors at different temperature. Electric field induce biphenyl mesogens align parallel to the direction of applied electric field.

通过本论文的工作，阐述了含联苯液晶基元的硬主链型侧链液晶聚炔及其单体的结晶与液晶行为、结晶形貌和外场诱导的分子取向行为，为开发新型高性能材料提供必要的结构依据。

Therefore the paper also indicated that the HUBEX as the Eastern Asia part of the GAME is necessary to continue, and increasing the temporal and spatial resolution of meteorologic elements observed is important to improve our forecasting accuracy of the weather and climate.

因此，本文也证实了GAME的外场加密观测试验一HUBEX等开展的必要性，说明增加观测资料的时空分辨率对于提高我国天气气候的准确率具有重要意义。

The third chapter talked about two different treatments of quantum decoherence in V〓 system. For one the decoherence factor is been expressed in the form of a random external field. And the mean density matrix is calculated to signal the decoherence by showing its nondiagonal elements to approach to zero. In another numerical work done by us, random interaction between system and environment is imposed to mimic the decoherence factor.

第三章讨论了V〓体系中量子相干性研究的两个工作，一个用随机外场来代表消相干因素，采用对系统的密度矩阵进行随机平均的解析方法得到一些结果，一个是我们用数值计算方法的处理，其中消相干因素考虑成系统和环境的相互作用。

The general design concept in France is discussed in this paper, which integrates ship platform, combat system, torpedo threat, countermeasure design and outside sea trials. To obtain a countermeasure system with low cost and high performance, the design concept of the Scorpene submarine includes the following three sides:(1) optimizing torpedo countermeasures based on torpedo threat characteristics and subsequent operational reactions;(2) integrating combat system and platform;(3) simulating operational reaction efficiency based on actual operational schemes.

本文介绍了法国海军潜艇设计机构长期研制反鱼雷对抗系统所积累的经验，该机构以&天蝎星&潜艇设计为例提出了一种基于将舰艇平台、作战系统、鱼雷威胁、对抗系统设计以及外场海上试验结合在一起综合考虑的整体设计理念，即根据鱼雷的威胁特性和后续的作战响应优化鱼雷对抗系统、集成作战系统与平台，以及基于实战方案进行舰艇反应效率仿真，以此获得低成本高性能的对抗系统。

The mian works are as follows:(1)By coprecipitation technique and coprecipitation- gel technique the nano zirconia powder was produced, factors affecting the properties of nano zirconia powder such as pH and the content of stabilizator are analyzed;(2)By the new pressless sintering process, the nano zirconia ceramic was produced, factors which can affecting the properties of nano zirconia sinter body such as moulding press and the sinter temperature are analyzed;(3)By the microtherm pressless sintering process, the nano copper added functional zirconia ceramic composite was produced, microscopic dimensionality and electric properties of such sinter body and the factors affecting such sinter body are analyzed;(4)By the self-invented "external albumen coating" technique the zirconia powder was successfully coated by carbon in the corresponding sinter body, which can help solve the traditional aggregation problem to some degree;(5)Based on analyze the characteristics in the nano powder sinter process, the "three-ball sinter model" was proposed, for the relationship between the relative density and porosity of sinter body, by mathematical fitting, such model was successfully verified.

本研究比较系统地研究了纳米氧化锆陶瓷的合成与成型机理，特别是讨论了纳米氧化锆陶瓷的稳定性，为防止纳米颗粒在外场作用下的团聚和长大提供了理论基础和实验数据，具体工作有以下几方面：(1)采用共沉淀法和共沉淀-凝胶法制备了纳米氧化锆粉体，并分析了pH值和稳定剂含量对粉体性能的影响；(2)采用新型无压烧结工艺制备了纳米氧化锆陶瓷，并分析了成型压力和烧结温度对烧结体性能的影响；(3)采用低温无压烧结工艺制备出添加纳米铜的功能性纳米氧化锆复合陶瓷，并分析了烧结体的微观尺度和电学性能的变化以及影响因素；(4)通过自创的&鸡蛋清外敷法&在真空镀膜台上对纳米氧化锆粉体进行包敷碳颗粒的表面处理，并采用真空烧结工艺制得相应烧结体，初步开始解决陶瓷烧结过程中团聚长大这一传统难题；(5)通过分析纳米颗粒在制备烧结体过程中的实际特点，提出了&三球烧结数学模型&，通过引入坯体相对密度和孔隙率的相对关系分析并通过自行编写的数学拟合软件，验证了这一数学模型。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。