In this algorithm, the direction-of-arrival is assumed to be a discrete random variable with a priori probability density function defined on a set of candidate points. Whether or not the secondary sample is required is based on the a posteriori probability distribution of a set of candidate point"s, which can be calculated from the array received signals. And then, the resulting beamformer is a weighted sum of the beamformers pointed at the latest set of point"s, which are combined according to the value of the a posteriori probability for each pointing direction.

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The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和貢獻(xiàn)如下：●提出了一種基于窄帶處理的FH信號(hào)盲檢測(cè)和參數(shù)盲估計(jì)的實(shí)現(xiàn)方法，即首先求出多路信號(hào)之間的互相關(guān)欧美变态区另类，進(jìn)而得到互功率譜密度矩陣亚洲欧美日韩一区在线，然后通過(guò)對(duì)CSDM進(jìn)行對(duì)折處理來(lái)抑制噪聲、定頻信號(hào)及其他干擾的影響在限福利影院，并將所有屬于FH信號(hào)的hop(每一跳的駐留時(shí)間在時(shí)頻圖上持續(xù)的線段)從CSDM中篩選出來(lái)，最后用陣列信號(hào)處理中的到達(dá)方向估計(jì)理論在頻域中估計(jì)出各個(gè)hop的方向參數(shù)，利用方位信息完成FH信號(hào)分離并得到FH信號(hào)的數(shù)目及其各自的參數(shù)集丰满人妻中文字幕毛片；●提出了一種確定FH信號(hào)檢測(cè)門(mén)限的策略，該策略不僅使得檢測(cè)門(mén)限能夠通過(guò)理論計(jì)算得到尤物视频免费，而且還顯著地抑制了非跳頻信號(hào)的干擾色香色mxsv欧美一区二区，從而能有效地檢測(cè)出FH信號(hào)；●提出了一種基于寬帶處理的短波FH信號(hào)盲檢測(cè)和參數(shù)盲估計(jì)的實(shí)現(xiàn)方法国产无码在线黄色工厂，即首先利用寬帶空間譜測(cè)向技術(shù)得到接收信號(hào)的DOAwww.国产.com，然后采用寬帶波束形成技術(shù)對(duì)特定方向進(jìn)行空間濾波，實(shí)現(xiàn)多個(gè)信號(hào)的分離视频在线A片，最后分別提出了兩種FH信號(hào)的盲檢測(cè)和參數(shù)盲估計(jì)方法日韩手机在线视频，第一種方法適用于空間某個(gè)特定方向上存在著幾個(gè)駐留時(shí)間不同的恒跳速FH信號(hào)和其他干擾信號(hào)的混合信號(hào)，第二種方法適用于空間某個(gè)特定方向上僅含一個(gè)可變跳速的FH信號(hào)和噪聲的混合信號(hào)国产激情视频久久久；●將空間插值的概念和寬帶波束形成技術(shù)結(jié)合起來(lái)精品麻豆国产免费一区二区三区，提出了一種基于頻域處理的寬帶恒定束寬的波束形成方法国产精品一级毛片www。

The article focuses on the teaching of circuitry,from the basic concept,discusses the direction of the voltage or the electric current in different situations such as Ohm′s law,Kirchhoff′s law,Superposition theorem and so on.

結(jié)合在多年的教學(xué)，本文針對(duì)不同的情況電壓和電流的方向做了探討95色色色。1電流電壓的實(shí)際方向和參考方向習(xí)慣上把電流的方向定義為正電荷運(yùn)動(dòng)的方向或負(fù)電荷運(yùn)動(dòng)的相反方向亚洲色一区，而把電壓的實(shí)際方向定義為電位降的方向。

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The projection gradient method will be a possible way to solve the problem that we just get. It has been shown that the projections of the every directions, of which is the boundary point in linear restraint problems, are the possible decent directions, and the projection of negative grads direction is a decent direction. In 1960, Rosen proposed the basic idea of projection gradient methods, and then lots of researchers have been tried to find the convergence of this method. But most of them get the convergence with the condition to amend the convergence itself.

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The device comprises: a conveyer belt; a let-off roller (16) on which the conveyer belt runs and from which the rubber tape is let off; a traverser (21) to move the let-off roller (16) in an X-axis direction parallel to the rotational axis of the object; a radial shifter to move the let-off roller in a Y-axis direction perpendicular to the X-axis direction; a tilter (23) to turn the rotational axis of the let-off roller (16) around a reference axis which is parallel to a Z-axis direction perpendicular to the X-axis direction and Y-axis direction.

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And the direction query efficiency based on multi-approximate index is compared with that based on taditional external approximation index. 2 The algorithms of nearest neighbor and reverse nearest neighbor about point, line and ploygen based on multi-approximate index are proposed after the virous methods of distance measure are discussed in detail. And the query efficiency of NN and RNN based on multi-approximate index is compared with that based on taditional external approximation index. 3 The basic concept of semi-join and the strategy of distance-direction semi-join are introduced. And the model of distance relationship, direction relationship and the bounding for spatial object are discussed. Then the method is presented about how to implement the query of distance-direction semi-join, and the efficiency of the algorithm based on multi-approximate index is compared with that based on taditional external approximation index.

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We performed a simulative test, which confirms that wavelet analysis can separate annual wobble and Chandler wobble. Our results show that this method can be used in astronomical geodynamies effectively. This paper is divided into two parts. The first is about statistic characteristic of polar motion. Polar motion includes secular motion, long period fluctuations, Chandler wobble, annual wobble and high frequency wobble. The secular motion is 3.4mas/year and towards 760W meridian. Long period fluctuations have difference periods in x-axis and y-axis. They are 31.7-year and 24-year in x-axis and 28.5-year and 22.9-year in y-axis. These 2~? decades fluctuations have an amplitude of about 30 mas , and are very nearly linearly polarized, with the observed motion of pole being almost entirely along a line between 360E and 1440W. There is a 55.4-year wobble whose amplitude is 9 mas. The amplitude of the interannual fluctuations is about 4? mas. The amplitude of long period fluctuations decreased after 1970. The annual wobble is a steady wobble. It retrograde wobble is only 1/20 of prograde wobble in amplitude.

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In this study, six campaigns around Anping tide gauge, Tainan, were successfully performed and the collected GPS buoy data were processed with four types of precise ephemeris provided by IGS, including final product, rapid product, ultra-rapid product and ultra-rapid product with the use of PPP technique. Comparing the PPP results with DGPS, the differences reach 3~5 cm in the horizontal and 10 cm in the vertical with final product; 6~8 cm in the horizontal and 15 cm in the vertical with rapid product; 15~20 cm in the horizontal and 30~40 cm in the vertical with ultra-rapid product; 2~3 m in the horizontal and 3~4 m in the vertical with ultra-rapid product. In addition, the collected data were also processed by DGPS techniques using different reference stations to analyze the effect of various baselines. The results show that accuracy degrades when the baselines increase.

本研究在臺(tái)南安平潮位站旁進(jìn)行6次GPS浮標(biāo)施測(cè)一级毛片,黄片，首先利用與GPS浮標(biāo)距離不同之GPS參考主站來(lái)進(jìn)行差分定位，分析基線距離對(duì)GPS浮標(biāo)定位成果的影響国家一级无码黄片，由實(shí)驗(yàn)結(jié)果可得出基線越長(zhǎng)則定位準(zhǔn)確度越低欧美性人妖XXXXⅩ极品；再以IGS提供之最終產(chǎn)品、快速產(chǎn)品亚洲免费人成视频观看、超快速產(chǎn)品(Ultra-Rapid product)之觀測(cè)部分observed half国产人人夜夜、超快速產(chǎn)品(Ultra-Rapid product)之預(yù)估部分四種不同發(fā)布延遲時(shí)間的精密星歷與精密時(shí)表改正資料對(duì)GPS浮標(biāo)進(jìn)行精密單點(diǎn)定位解算，與傳統(tǒng)差分相對(duì)定位方法定位結(jié)果進(jìn)行比較后91久久精品无码一区二区毛片，得出使用最終產(chǎn)品之平面方向均方根誤差(Root Mean Square ErrorA片在线观看网站免费不卡色欲， RMSE)可達(dá)3~5公分，而高程方向均方根誤差可達(dá)10公分91视频免费播放；快速產(chǎn)品之平面方向均方根誤差可達(dá)6~8公分午夜毛片www，而高程方向均方根誤差可達(dá)15公分；超快速產(chǎn)品觀測(cè)部分之平面方向均方根誤差可達(dá)15~20公分无码人妻精品一区二区不卡，而高程方向均方根誤差可達(dá)30~40公分强奸视频网站在线观看高清无码；超快速產(chǎn)品預(yù)估部分之平面方向均方根誤差可達(dá)2~3公尺，而高程方向均方根誤差可達(dá)3~4公尺91热在线视频观看。

anti clockwise：反時(shí)針?lè)较虻?逆時(shí)針?lè)较虻?/p>

anticipation 預(yù)料,預(yù)期 | anti-clockwise 反時(shí)針方向的,逆時(shí)針方向的 | anticoncussion plug 抗振蕩耳塞

clockwise direction：順時(shí)鐘方向,順時(shí)針?lè)较?/p>

順時(shí)針角度 clockwise angle | 順時(shí)鐘方向,順時(shí)針方向 clockwise direction | 順時(shí)鐘方向,順時(shí)針方向的 clockwise,CW

in the right direction：方向正確;以正確的方向;朝著正確的方向

go too far vi. 走得太遠(yuǎn);做的過(guò)火 | in the right direction 方向正確;以正確的方向;朝著正確的方向 | Roubini Global Economics 比尼全球經(jīng)濟(jì)咨詢公司;魯比尼全球經(jīng)濟(jì);羅比尼全球經(jīng)濟(jì)研究院

Intuit Direction：方向感使你有更好的方向感可在地圖上識(shí)別方向

Intimidate威嚇斥退、驚嚇對(duì)手 | Intuit Direction方向感使你有更好的方向感可在地圖上識(shí)別方向 | Listen聆聽(tīng)可察覺(jué)來(lái)襲的敵人

Ten o'clock：十點(diǎn)鐘方向

Hm... one o'clock.|Hm 一點(diǎn)鐘方向 | Ten o'clock.|十點(diǎn)鐘方向 | One o'clock... ten o'clock.|一點(diǎn)鐘方向 ... 十點(diǎn)鐘方向

direction of delaminate：層裂方向,剝離方向

直動(dòng)引擎 direct acting engine | 層裂方向,剝離方向 direction of delaminate | 淀積方向(焊接) direction of deposition

gibing：改變帆的方向使帆改變方向

gibing 改變帆的方向 | gibing 改變帆的方向使帆改變方向 | gibleh 利比亞地中海岸的干熱風(fēng)

jibing：改變帆的方向使帆改變方向

jibguy 首斜桁中張索 | jibing 改變帆的方向使帆改變方向 | jibing 使帆改變方向

Doublecross：兩次過(guò)人LT+LS扳向空手方向再扳往反方向

Hesitation停球?站立時(shí)按RT | Crossover過(guò)人LT+LS扳向空手方向 | DoubleCross兩次過(guò)人LT+LS扳向空手方向再扳往反方向

CW：順時(shí)針?lè)较?/p>

G02:順時(shí)針方向(CW)圓弧切削. G03:逆時(shí)針方向(CCW)圓弧切削. 工件上有圓弧輪廓皆以G02或G03切削,因銑床工件是立體的,故在不同平面上其圓弧切削方向(G02或G03)如圖1所示. 其定義方式:依右手坐標(biāo)系統(tǒng),視線朝向平面垂直軸的正方向往負(fù)方向看,