扫描速度

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。

If NULLs were not indexed, then the optimizer could only use indexes on columns with NOT NULL constraints.

如果觉得效率太慢，可以适当增加块的读取数和查询的并行度来加快全表扫描的速度。

The computer-aided B+M-mode ultrasonography was used to assess their tongue movements. Duration, magnitude and speed of tongue movements in different swallowing phase were measured from 112 healthy adult volunteers and compared with their dentofacial morphology using a simple correlation analysis.

选取112名健康的成年志愿者为受测对象（男性74位，女性38位，平均年龄为22岁），以电脑辅助B模式结合M模式口腔超音波防震扫描技术评估吞咽时舌头的运动情形，计算舌头在不同吞咽分期的运动持续时间、运动振幅以及速度，并以简单相关分析法求得与齿颜面形态的相关性。

And it also put forward the principle of panel division, the formula of signal timing, and the requirement of capacity and speed of frame cache.

文章给出了屏体的划分原则，信号时序的计算公式，上屏时钟和点亮效率与其它设计参数的关系，亮度、对比度的计算公式和影响因素。文章分析了扫描电路对帧缓存容量和速度的需求。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失