在飞行中的

The common method, that all strong-correlation terms of the model are eliminated, can bring the loss in the engineering application, so the new method is proposed that the identified model reserves some correlation. The augmented matrix A is constructed by the outputΔW and the matrix S. The"determinating order based on ratio of determinant"is brought out to screen the strong-correlation terms in the structure identification. The latent root estimation is improved in screening the eigenvalues and eigenvectors. Thus the estimation precision is improved greatly.The consistence check of guidance instrument error coefficients of flight test and ground test is the purpose of flight experiment. The causes of inconsistency of the two models are analyzed. The hypothesis test of linear regression model based on F statistics is proposed to check the consistence.Finally, the instability of error coefficients is probably caused by the change of the flight environments, therefore, the relation between the error coefficients and flight environment is analyzed. The approach is presented to identify SINS guidance instrument error models and compensate the error in the segmented sections corresponding to the change of vertical acceleration of aircraft.

在结构辨识中，常用的方法由于将模型中的强相关项全部剔除而给工程应用带来损失，因此，本文提出了新的有益思想，即在保留一定相关性的基础上进行辨识：将输出向量ΔW与环境函数矩阵S构成增广矩阵A，然后采用"比定阶行列式"来剔除相关向量的方法，这样既可以尽可能多地保留了对落点影响大的强相关参数，又可以对落点影响小的强相关参数给予剔除；在参数估计中，改进了特征根估计中特征根和特征向量的筛选方法，提出"近零"准则，从而大大提高了参数估计的精度；再者，鉴于天地模型"一致性"检验是飞行试验和SINS制导工具误差系数分离的主要目的，因此，本文又深入分析了造成天地模型不一致的原因，提出了采用基于F统计的线性回归模型假设检验方法来进行捷联制导工具误差模型的天地"一致性"检验；最后，鉴于飞行环境剧烈变化可能会对惯性仪表误差系数稳定性带来一定的影响，因此本文深入地分析了SINS制导工具误差系数与外界环境的关系，提出了基于过载变化大小的分段辨识和分段实时补偿的算法。

A clear image of what might be an alien or ET in a space suit can be seen in one cave painting along with a classical flying saucer shaped UFO that appears to be either beaming something down or beaming something up, in what might be an ancient UFO abduction scenario. A force-field or trail of some sort is seen at the rear of the UFO.

一个清晰的影像可能是一个外星人或ET，著住太空装能在一洞穴画作中被看到，沿着有一只古典的飞碟形状的不明飞行物，它像在以光束射低或射高东西，可能是一幅古代的不明飞行物绑架景况，一力场或某种东西的曳被见在不明飞行物的后方。

Seeing his daughter pregnant and growing heavier and heavier by the day, with the culprit no more in sight than the wings of a redbird in flight, the blacksmith reflected on the fact that he was too poor and isolated to sue successfully.

看到自己的女儿怀孕和日益沉重的一天，与贼人没有比看到一个redbird翅膀在飞行中，铁匠反映的事实是：他太贫穷和孤立的起诉成功。

ICARUS did it with feathers glued together with wax; he flew too near the sun and plummetted into the sea. Giovanni Battista Danti tried it with pinions of iron and feathers in 15th-century Perugia hurtling over the piazza and crash-landing on the church. Charles Bernouin in 1672 in Regensburg strapped a rocket to himself as well as calico wings.

希腊神话中的伊卡罗斯曾经把蜂蜡和羽毛粘到一起进行飞行，的但是他飞得离太阳太近坠海而亡。15世纪意大利佩鲁贾的乔瓦尼·巴蒂斯·但丁用铁翼和羽毛尝试飞行，他擦过广场摔落在教堂顶上。1672年查尔斯·贝尔努安在雷根斯堡把火箭炮和布质的翅膀绑在自己身尝试飞行。

ICARUS did it with feathers glued together with wax; he flew too near the sun and plummetted into the sea. Giovanni Battista Danti tried it with pinions of iron and feathers in 15th-century Perugia, hurtling over the piazza and crash-landing on the church. Charles Bernouin in 1672 in Regensburg strapped a rocket to himself, as well as calico wings.

希腊神话中的伊卡罗斯曾经把蜂蜡和羽毛粘到一起进行飞行，的但是他飞得离太阳太近坠海而亡。15世纪意大利佩鲁贾的乔瓦尼·巴蒂斯·但丁用铁翼和羽毛尝试飞行，他掠过广场摔落在教堂顶上。1672年查尔斯·贝尔努安在雷根斯堡把火箭炮和布质的翅膀绑在自己身尝试飞行。

ICARUS did it withfeathers glued together with wax; he flew too near the sun and plummetted intothe sea. Giovanni Battista Danti tried it with pinions of iron and feathers in15th-century Perugia,hurtling over the piazza and crash-landing on the church. Charles Bernouin in1672 in Regensburgstrapped a rocket to himself, as well as calico wings.

希腊神话中的伊卡罗斯曾经把蜂蜡和羽毛粘到一起进行飞行，的但是他飞得离太阳太近坠海而亡。15世纪意大利佩鲁贾的乔瓦尼·巴蒂斯·但丁用铁翼和羽毛尝试飞行，他掠过广场摔落在教堂顶上。1672年查尔斯·贝尔努安在雷根斯堡把火箭炮和布质的翅膀绑在自己身尝试飞行。

Minishing the surplus force is the crux of the loading system.the paper aims at lessening the surplus force and improving the loading system performance.

在仿真系统中，飞行控制系统采用实物，而飞行器在飞行过程中所受的外界作用力则由电液伺服加载系统来提供。

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。

In the second part of the paper, the sport techniques of the flight elements was analysised in-depth theoretically by the movement technical structure:①the giant swing was first analysised in mechanics by applying the Kane's method, the dynamic equation of 5-link multi-body model was established, and the computer simulation software of the giant swing on the high bar was developed.

其次，作为单杠上飞行动作系统性研究的另一主要方面，本论文对飞行动作一般技术结构中的各技术环节进行了深入的理论分析：①着重对飞行动作准备阶段的回环运动技术进行了动力学分析，主要采用了多体力学理论中的Kane方法，建立了5环节人体回环运动的动力学方程，并应用计算机数值仿真技术研制开发了用于回环运动动力学分析的数值仿真软件，进而以动作实例对回环运动进行了数值仿真与误差分析，其所得到的数值仿真结果能够满足对人体回环运动的动力学分析和仿真要求；②对于飞行动作的撒手技术环节，本论文从人体环节相对运动角度，来分析撒手时人体质心的运动以及撒手时角动量参数，并列举了几种飞行动作撒手技术的基本力学指标；③关于飞行动作的空中技术，论文在总结了空翻转体动力学机理的研究成果基础上，对人体空中运动定量化问题进行了一般性描述，并进一步应用刚体动力学理论，着重建立起了描述空翻与转体技术之间定量化的关系，讨论了空翻转体运动的稳定性及其运动模式的转换问题，它对于定量地评定空翻转体技术以及今后对空翻转体动作进行数值仿真都具有理论上和实践上的重要意义；④关于飞行动作再握技术环节，本论文避免了以再握瞬时性的力学参数指标来描述再握技术特征的简单化途径，提出以再握下摆与回环下摆相对比的方法来研究再握技术，并以飞行动作再握技术的具体实例进行了对比分析，表明再握下摆技术相比回环下摆技术有着相当的困难性和复杂性，运动员对再握下摆过程中各环节的相对运动实施有效的控制，是连接高难动作以及顺利流畅地完成成套动作的关键。

My heart is sad like a mourning dove that's lost its mate in flight.

我的心悲伤的就像一只在飞行中失去伴侣的悲鸣的鸽子。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。