According to tracking theory, automatic following can be divided into three systems: step-advance tracking, taper-scan tracking and single-pulse tracking.
按跟踪原理，自动跟踪可分为三种体制：步进跟踪、圆锥扫描跟踪和单脉冲跟踪。
According to tracking data collected by the US military, SJ-12 has performed multiple manoeuvres since its launch in June, slowly shifting its orbit to match that of SJ-06F.
通过美军收集的跟踪数据显示，SJ-12自6月发射升空后进行了多次变轨，并逐渐的调整到SJ-06F的轨道上。
As the fleet ages, there's an increasing need for embedded wireless strain sensors capable of detecting and tracking accumulated strains — "precursors" to crack initiation, according to the official.
随着机群服役时间的增加，对嵌入式无线应力传感器的需求也在不断的增加，通过这些传感器对应力积累进行探测和跟踪，避免飞机机体发生可能的疲劳和破裂。
In 2010, Facebook pushed past Google to become the most popular site on the Internet for the first time, according to two Web tracking firms.
在2010年，据两个网页追踪公司的调查：Facebook已经挤开Google第一次成为美国最流行的网站。
According to its Web page, "trac is an enhanced wiki and issue tracking system for software development projects," but it works equally well for administration requests.
Trac的网页指出，“Trac是一个用于软件开发项目的wiki和问题跟踪系统”，但是它同样适用于跟踪管理请求。
According to the Northwestern researchers, however, these firms should be tracking instant messages instead.
然而，据西北大学的研究人员表示，这些公司应该跟踪他们的即时信息。
RESEARCHERS at Yale University have been tracking American opinion on climate change for some years now and showing how it differs according to political allegiance.
耶鲁大学的研究者追踪美国舆论对气候变化的看法到现在已有数年，研究显示，根据所处阵营的不同，人们对气候变化的看法也各个不同。
Google switched to the newer tracking code well over a year ago, and according to a Google consultant interviewed by Pingdom, the old code may be deactivated in the next few months.
Google在一年前（link）就切换到新的追踪代码（link），而根据Pindom采访的一个Google顾问估计，旧代码会在将来的几个月里无法使用。
According to one Wall Street Journal study, the top 50 Internet sites, from CNN to Yahoo to MSN, install an average of 64 data-laden cookies and personal tracking beacons each.
据华尔街日报的研究中，排名前50位网站，从CNN到雅虎，再到MSN，每个网站平均安装设置了64个充满数据信息的Cookie或者说个人信息追踪指示器。
The largest category, games, has more than 13,000 apps, according to data-tracking firm Mobclix Inc. The smallest, weather, has 310 apps.
数据提供商Mobclix的数据显示，软件数量最多的类别是游戏，拥有超过13,000款软件；而最小的类别是天气，拥有310款软件。
The largest category, games, has more than 13, 000 apps, according to data-tracking firm Mobclix Inc. The smallest, weather, has 310 apps.
数据提供商mobclix的数据显示，软件数量最多的类别是游戏，拥有超过13,000款软件；而最小的类别是天气，拥有310款软件。
And, according to Joe, Charles Tsaia of Ashoka’s youth entrepeneurship project is using certain accounts for tracking the projects that are going on in his field.
根据Joe的说法，CharlesTsaia of Ashoka’syouthentrepeneurship project正在使用一些账号来跟踪该领域的一些正在进行的项目。
The ramp metering rate is determined by the PID controller whose parameters are tuned by fuzzy logic according to the density tracking error and error variation.
斜坡根据密度跟踪误差和误差变化情况，通过模糊逻辑对控制器参数进行调整，确定了测量速度。
In most cases, the killers were never identified or punished, according to the institute, which spent two years tracking the statistics.
根据研究所两年来调查的数据，在大多数情况下，无法确认和惩罚凶手。
The torque of IPMSG is suitably controlled according to a generator speed by maximum power point tracking.
通过使用最大功率点跟踪控制技术，根据发电机转矩适当地控制发电机的速度。
According to the author's Cotangent relations theorem, bearings-only target tracking with linear motion is achieved.
根据所提出的余切关系定理，实现了纯方位观测的直线运动目标跟踪。
According to this, this paper focuses on the study of bearings-only passive tracking system in the aspects of the target location, time alignment and nonlinear filtering algorithm.
基于这样的背景，本文从目标定位、时间配准和非线性滤波算法三个方面对多站纯方位被动跟踪系统进行了研究和算法改进。
According to the characters of the infrared target and the background figure, kinds of infrared target tracking algorithms are studied, and the suitable ones are selected.
本文研究了多种红外目标运动跟踪算法，结合本系统红外目标特性与图像背景特性，选取了适合本系统的算法。
According to the experimental data, the system tracking ability has been improved greatly, and the measuring range has been extended.
实验表明，改进方案改善了系统的跟踪能力，扩大了系统的测量范围。
Frequency tracking means that sampling intervals of following sampling is updated according to new frequency estimation, so synchronous sampling error will be reduce step by step.
频率跟踪就是依据前一次频率估计修改下一次采样的采样间隔，从而使同步偏差越来越小。
The new tracking positions that are generated will be blended with the previous tracking positions according to the frame number.
新的跟踪位置生成将混合了前面的跟踪位置根据帧数。
According to the feature of ear and its position on the side face a method based on edge-tracking was adopted for human ear localization and extraction from side face images.
根据外耳及其所在位置的特征，提出了一种从侧脸图像上准确定位并提取出人耳的新方法。
In order that the image tracking system can select segmentation algorithm itself according to the object image feature, this paper presents an intelligent decision method of image segmentation.
为了使图像跟踪系统能根据图像特征自适应选取分割算法，给出了一种基于粗糙集理论的图像分割智能决策方法。
Using the thoughts of chaining of primary key of the database, according to the logistics characteristics of different links on supply chain, I have analysed the tracking follow of each link.
运用数据库基表的主码链接思想，根据供应链上各环节物流特点的不同，对各环节的物流跟踪流程进行了较为详细的分析。
A seam tracking device is developed according to the requirement to weld hollow steel balls of net frame nodes.
根据空间网架结构结点空心钢球的技术要求，研制了一种焊缝自动跟踪系统。
According to acquisition and tracking strategy and laser detection theory, an expression of the best Angle of beam divergence under direct detection is provided.
根据捕获跟踪策略和激光检测理论，给出了直接探测情况下最佳光束发散角的表示式。
According to the shortage of traditional experiment of radar's dynamic tracking accuracy, the method of uniform design is applied in radar dynamic tracking accuracy experiment.
针对传统的雷达动态跟踪精度试验中存在的不足，提出将均匀设计试验方法应用于雷达动态跟踪精度试验的思想。
First, according to the tracking error dynamics and kinematics described by unit quaternion error and angular velocity error, a sliding mode controller is derived based on Lyapunov theory.
首先根据由误差四元数和误差角速度描述的跟踪误差动力学和运动学方程，设计了基于李亚普诺夫方法的滑模变结构控制律。
First, according to the tracking error dynamics and kinematics described by unit quaternion error and angular velocity error, a sliding mode controller is derived based on Lyapunov theory.
首先根据由误差四元数和误差角速度描述的跟踪误差动力学和运动学方程，设计了基于李亚普诺夫方法的滑模变结构控制律。
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