lower track 中文意思是什麼
lower track
解釋
下道-
Y : raise lower terrain for the object track only
Y :提升下降地形以配合物件高度只限於路軌 -
One complete circular track appears in the lower part of the photograph.
照片的下部有一個完整的圓形徑跡。 -
Flood track simulation in the lower reaches of the yellow river through sediment and flow regulation of xiaolangdi reservoir in
小浪底水庫2002年調水調沙下遊河道洪水演進跟蹤模擬計算 -
Visual analysis of human motion has been receiving increasing attention from researchers in the fields of image processing and computer vision during the past few years. it has a lot of applications in virtual reality, smart surveillance system, advanced user interface, motion analysis and video compressing, etc. this paper focuses on the technology of human motion tracking based on video, first, we make a summarization of the domestic and overseas status of the research in this field. on the basis of this, we analyse the technical difficulties of human motion tracking. as most of the existing model - based methods of human motion tracking perform not so good in some situation as they need mannual intervention, and also the precision of tracking is not so satisfying during the research of tracking of walking people because of the self - occlusion of legs, this paper proposes an algorithm of automatic detection and tracking of legs of the walking people based on monocular image sequences, in which we analyse the features of walking people, track the five joints of lower limbs, get various parameters, and then re - construct the walking process. the main research achievement is as follows : 1 ) we propose an algorithm of markerless automatic extraction of leg skeleton. first we divide the video into continuous image sequences, after background subtraction, the satisfying human region could be extracted, then we get a single - connected region by converting the rgb image to binary image and median filtering. afterwards, the contour of lower limbs in the frame with a widest boundingbox is detected, using sobel operator, to find the ankle joint of leg behind according to the features and rules of walking, then, the joint of knee of leg behind, hip, ankle of leg in front, knee of leg in front could be got in turn. so, model of leg skeleton is constructed
首先將視頻分解成許多連續的靜態圖像幀，經過背景去除，把感興趣的人體區域提取出來，通過二值化，中值濾波等預處理方法得到只有人體的一個單連通區域，然後用sobel運算元檢測出boundingbox最寬幀中人體下半身的輪廓，根據運動規律及特徵找到後腿踝關節點，結合從boundingbox最窄幀中所獲取的腿長依次得到後腿膝關節，跨部關節，前腿踝關節，前腿膝關節四點，從而構建出腿部骨架模型。 2 ）實現了人體步行腿部骨架的跟蹤演算法。在完成對腿部骨架模型的自動初始化之後，本文對跨關節、膝關節及踝關節分別採用運動建模、圓周相交定點演算法、運動預測及預測點周圍搜索rgb相似矩形塊三種方法確定每一幀中其實際坐標，從而重構出腿部骨架的運動過程。 -
The following algorithms have been proposed and tested in the thesis : 1 frequency selective fading : combine the isomorphism between the input space and the output space and propose a new approach to blind equalization of the channel. compared with conventional methods, the new approach offers lower computational complexity, better performance, and more robust against the over - determination of the system order ; 2 time selective fading : a new approach to the equalization of time selective channel based on the zero - forced equalizer is proposed which is more simple in its structure of algorithm ; 3 time - varying channel : using the instantaneous mean value changes of the output signal to extract the information of channel variations and model it using ar model, kalman filter is then employed to track channel variations, it bears faster ability in tracking the variation of tv channels ; based on the isomorphism between the inputs and the outputs and some of the approaches using in mimo system, a new algorithm of equalization of simo time - varying channel is proposed, which also share the merits of being robust against the over - determination of the system order ; model the time - varying channel using the multi - resolution decomposition wavelets, and then a blind identification method based " on the model is proposed ; at last, a new model for equalization and identification of mimo system is proposed
主要工作在以下幾個方面： 1 、針對頻率選擇性衰落通道：結合輸入輸出空間同構關系提出一種新的頻率選擇性通道均衡方法，與傳統方法相比，該方法計算量更小，收斂速度更快，性能更優，且對系統階次的過確定表現穩健，具有實際均衡應用價值； 2 、針對時間選擇性衰落通道：提出一種基於迫零均衡的時間選擇性通道均衡方法，演算法結構簡單； 3 、針對時變色散通道：利用瞬態均值曲線提取通道時變信息，對之ar建模，利用卡爾曼濾波器跟蹤時變通道抽頭變化，可以快速跟蹤通道變化；基於輸入輸出空間之間的同構關系以及多輸入多輸出系統的處理方法，提出了新的單輸入多輸出色散時變通道均衡與識別演算法，同樣具有對通道階次過確定保持穩健的優點；結合小波多解析度分析提出一種基於小波模型的通道盲識別演算法；研究時變的多輸入多輸出系統的盲均衡與盲反卷積問題，給出一種時變系統處理模型。 -
By analyzing the relation between the train passing capacity and tunnel length as well as tunnel slopes the upper and lower limits for installing mechanical ventilation in railway double track tunnel have been determined, which provides science foundations for the formulation the ventilation design norm for railway double track tunnels in operation
通過對列車通過能力與隧道長度和坡度關系的進一步研究，得出了內燃牽引雙線鐵路隧道設置機械通風的上、下界限，為雙線鐵路隧道運營通風設計規范的制訂提供了科學依據。 -
The content of this theme is as follows : without time, without open, without stopping railway transport, and without interrupting traction current of block tested, meanwhile track circuit parameters in electrical and no electrical blocks is measured of on - line, dynamic and real - time. these parameters include voltage of fsk signal, voltage of industrial and harmonic wave interference, upper frequency, lower frequency, carrier frequency and low frequency 18 messages frequency
本課題研究內容：在不要點，不開天窗，不中斷行車，不中斷被測區段牽引電流的情況下，在線、動態、實時測量電化區段和非電化區段的移頻信號電壓、工頻干擾電壓，移頻信號（調頻信號）的上邊頻、下邊頻、載波頻率、以及低頻18信息頻率等參數。 -
When the thigh of the lead leg drives up to a position parallel to the track, momentum is transferred to the lower leg, which extends naturally
當起跨腿的大腿部分平行於跨欄時，動力轉向自然伸展的小腿。 -
Click on the lower right corner of the " track " and can search vehicles within 24 hours of the track
點擊右下角的日歷按鈕，設定「開始時間」和「結束時間」便可查詢一段時間內的軌跡。 -
After this, we track the lower limber motion using the method that finds best parameters that minimize the difference between synthesis data and real data. how to search parameters in parameter space is a problem. traditional methods solve it using optimization techniques
模型跟蹤中如何在參數空間中搜索有效參數一直是一個難題，傳統方法一般通過優化的方法加以解決，而本文在跟蹤過程中，逐個分析各參數的求解，降低了參數空間的維數，使得計算更為簡單有效。 -
Since the energy of 18 - information track signal is concentrated around upper frequency and lower frequency, the frequency of the modulation signal is low, and it must have high resolution, we use zfft to detect it. as the energy of um - 71 signal is more concentrated, we use extreme value method to detect the frequency of modulation signal in frequency domain, which can satisfy the frequency resolution
針對18信息軌道信號能量集中在上、下邊頻附近且低頻信息頻率低的情況，提出了用zoom - fft （ zoom指頻率擴展或細化，簡稱zfft ）演算法進行信號的局部放大檢測低頻信息，以提高信號的頻率解析度，而um - 71軌道信號能量集中在載頻附近，在頻域上採用極值法檢測低頻信息，即可滿足信號頻率解析度的要求。 -
With ups online tools your company can improve customer service by streamlining your ordering and shipping processes, lower costs by reducing returns and customer support phone calls, and empower buyers by allowing customers to track their packages and choose their own shipping options
使用ups online工具ups online tools ，您的公司可簡化訂購和寄送程序，以改善客戶服務減少退貨和客戶支援電話服務，以降低成本讓客戶可以追蹤他們的包裹及選擇自己的托運選項，以提升購買者的效率。 -
Analysis and simulation results show that this algorithm has much lower complexity and is able to track the fast time varying channels in time. with such two advantages, this algorithm can efficiently adopt wireless fast varying channels and successfully achieve the fast channel estimation for ofdm - cdma systems
分析和模擬表明，該演算法計算復雜度低並能及時跟蹤快速時變通道，並由於這兩個主要特點使該演算法可以有效適應無線快速時變通道，順利完成系統的快速通道估計工作。
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