搜索结果: 1-15 共查到“POS”相关记录28条 . 查询时间(0.421 秒)
INTEGRATION OF IMAGE-DERIVED AND POS-DERIVED FEATURES FOR IMAGE BLUR DETECTION
Position and Orientation System (POS) Unmanned Aerial Vehicle (UAV) blur image detection degree of motion blur
2016/7/5
The image quality plays an important role for Unmanned Aerial Vehicle (UAV)’s applications. The small fixed wings UAV is suffering from the image blur due to the crosswind and the turbulence. Position...
RESEARCH ON VEHICLE-BORNE SYSTEM OF 3D SPATIAL DATA ACQUISITION BASED ON POS AND LASER RANGING TECHNOLOGY
POS Laser Scanner CCD Distance Measurement Indicator Vector Sensor Data Acquisition
2016/3/17
Ground spatial data acquisition is a key technology in digital city engineering, It is important to improve the efficiency of data acquisition. The main purpose of this paper is to develop vehicle-bor...
PoS Cryptocurrency wtih No Blockchain
cryptocurrency bitcoin pos blockchai Cryptocurrency systems
2016/1/23
There are some alternative Cryptocurrency systems which claim that they are based on PoS are actually based on PoSTW which denotes the Proof of Stake(coin), Time(day) and Work(hashing), while the ot...
改进的平方根容积卡尔曼滤波及其在POS中的应用
平方根容积卡尔曼滤波 非线性滤波 容积规则 数据融合 POS
2016/8/12
为解决扩展卡尔曼滤波在处理复杂非线性状态估计时,存在收敛速度慢、估计精度低及数值稳定性差等问题,引入一种改进的平方根容积卡尔曼滤波算法(A-SRCKF)。该算法在容积卡尔曼滤波基础上引入矩阵QR分解、Cholesky分解因数更新等技术,避免了矩阵分解、求逆及求导等复杂运算,极大降低了计算复杂度;并针对系统时变及统计特性未知情况下量测噪声协方差阵难以获取问题,通过引入自适应噪声估计器并结合小波卡尔曼...
Morphological features help POS tagging of unknown words across language varieties
Morphological features POS tagging unknown words across language varieties
2015/6/12
Part-of-speech tagging, like any supervised statistical NLP task, is more difficult when test sets are very different from training sets, for example when tagging across genres or language varieties. ...
Unsupervised Multilingual Learning for POS Tagging
POS Tagging Unsupervised Multilingual Learning
2014/11/26
Unsupervised Multilingual Learning for POS Tagging。
Simple Type-Level Unsupervised POS Tagging。
Learning to Map into a Universal POS Tagset。
基于双捷联算法的POS误差在线标定方法
误差模型 可观测性 双捷联算法
2012/9/27
为了提升位置和姿态测量系统(POS)的精度,结合POS工作过程中典型的匀速直线运动,提出了一种准实时的POS误差在线标定方法。首先设计了基于双捷联算法的在线标定方案,对系统误差方程进行简化处理,求出中时期导航条件下的系统误差状态转移阵。然后根据POS的两段相邻匀速直线运动导航误差,对系统误差参数进行在线标定,并通过可观测性分析得出POS运动与系统误差在线标定效果之间的对应关系。车载试验和飞行试验结...
我国的地形测量坐标系通常采用高斯－克吕格投影坐标系，由于地球曲率和子午线偏差的影响，POS系统提供的传感器姿态角向影像外方位角元素的转换过程中存在误差，需要引入一个额外的补偿矩阵进行修正。本文从分析地球曲率和子午线偏差对影像外方位角元素的影响入手，推导了补偿矩阵的严密计算公式，并完善了POS角元素的转换公式。通过对带有POS数据的实际航摄影像资料处理，验证了补偿矩阵的正确性和实用性。试验结果表明，...
THE EVOLUTION OF POS T-COMMUNIST COUNTRIES: AN INTERPRETATION FROM THE PERSPECTIVE OF COOPERATION
post communist transformation cooperation anchoring
2014/6/24
How do we account for the difficulties that former socialist countries experienced in the beginning of transition? Why is it that some countries performed relatively better (the Baltic and Central Eur...
基于POS辅助航空摄影测量直接对地目标定位理论，根据误差传播定律建立了物方坐标精度与影像外方位元素精度的关系模型，并从理论上分析了各种基本比例尺地形测图对影像外方位元素的精度需求。通过对摄自不同地区、多种摄影比例尺航摄影像的实验表明，由POS系统获取的影像外方位元素进行安置元素测图完全可以满足各种比例尺、不同地形图测绘的精度要求，但为了满足地物点的高程精度，对影像外方位元素的精度需求较用于平面测图...
机载POS直接地理定位的精度分析
POS 精度评定 摄影测量
2009/11/23
以机载POS直接对地定位的数据处理方法为基础，给出了直接地理定位的精度评定方法；结合不同地区的试验和生产数据处
理结果，重点对POS观测值精度和直接地理定位的实际精度2项指标进行了分析讨论。
机载POS直接地理定位软件AeroDG的设计与实现
POS AeroDG 摄影测量
2009/11/23
AeroDG是专门针对机载POS直接地理定位方法而设计开发的数据处理软件。本文从软件的功能需求入手，重点讨论了软件的
设计思路和关键技术，同时详细介绍了软件实现的主要功能。