spread in performance 中文意思是什麼

spread in performance 解釋
工作特性的變動范圍
  • spread : vt （spread）1 伸開，伸長（手臂等），展開，張開（帆等），打開（地圖等）；鋪開（氈子等），展寬，展...
  • in : adv 1 朝里，向內，在內。 A coat with a furry side in有皮裡子的外衣。 Come in please 請進來。 The ...
  • performance : n. 1. 執行，實行，履行；完成；實現；償還。2. 行為，動作，行動；工作。3. 性能；特性。4. 功績；成績。5. 演奏；彈奏；演出；（馴獸等的）表演；把戲。6. 【物理學】演績。
  1. This thesis researched the time synchronization method for 2d - ss system, and deeply discussed the bit error rate ( ber ) performance of multicarrier domain spread spectrum chip - level differential detection ( mc - ss - cldd ) in the presence of multi - user interference

    本論文從多載波擴頻通信系統出發，提出了廣義二維擴頻系統的同步演算法，並對多載波頻域擴頻碼片級差分檢測技術在多用戶情況下的系統性能進行了深入的研究。
  2. A novel communication receiver which uses lapped transform ( lt ) incorporating modified median filter ( mmf ) algorithm is designed for narrow - band interference excision. the lt domain mmf algorithm takes full advantages of the direct sequence spread spectrum signal, as well as the characteristics of lt, performing the transform domain filtering twice. the first filtering locates the position of interference and mitigates most of them. the second filtering is performed in a small neighborhood of the located interference. so lt domain mmf algorithm can completely mitigate the interference without distorting the desired signal. simulation results demonstrate the improved ber performance and increased robustness of our receiver

    本文採用改進的重疊變換域中值濾波演算法進行變換域抗干擾處理.該演算法既考慮到直接序列擴頻信號的特點，同時又利用重疊變換的特性對變換域系數進行了二次濾波.該演算法節省處理時間，並且不需要有關干擾的先驗知識，系統性能不會隨干擾頻率變化而變化，因而是一種很穩健的處理方法
  3. Then, based on the theory of discrete fourier transform, discrete cosine transform and discrete wavelet transform, two invisible image watermarking schemes in transform domain are proposed, one is circular symmetric spread spectrum digital image watermarking based on chaotic sequences, the other is the hybrid image watermarking based on wavelet decomposition and discrete cosine transform. finally, the good performance of the two algorithms is verified by some common image processing and attack experiments

    在分析了dft 、 dct 、 dwt的理論與演算法的基礎上，提出了兩種基於變換域的圖像隱形水印方案? ?基於混沌序列的圓對稱擴頻水印方案和基於小波分解和餘弦變換結合的水印方案，並通過一些常見的圖像處理及攻擊實驗驗證了這兩種演算法生成水印的性能。
  4. When signals pass high power amplifier, they would be distorted in amplitude and phase, leading to spectrum spread and distortion of in - band signals, both of which would weaken performance of the whole system in turn

    在無線通信中，信號在通過高功率放大器時會產生幅度和相位失真，造成頻譜擴展以及帶內信號畸變，導致整個系統性能的降低。
  5. As a new communication mode, the spread spectrum communications are widely used in military communication, distance finding and precise position, because of its well multiaddress access, lowly capture probability, the excellent performance of anti - interference and secrecy

    擴頻通信作為新型的通信方式，以其優良的多址接入、低截獲概率特性、抗干擾特性和強保密性被廣泛應用於軍事通信、測距與精確定位。
  6. The design of pn code synchronization should find a trade - off between the performance and the complexity of the reciever. in this paper, the pn code synchronization technique in spread spectrum communication is introduced

    本論文首先介紹擴頻系統中採用的pn碼同步技術，然後結合wcdma上行鏈路的特點，提出適合wcdma上行鏈路的擴頻碼同步方案。
  7. Extruded concrete curb technology was introduced in 20th congress icold held in beijing in year 2000, this method draw more attention for its improving the compaction of transition material, excellent performance of slope protection, and convenient construction. this extruded concrete curb technology was developed in ita dam construction in brazil, the ita method consists of building and extruded concrete curb by using an extruding machine before the construction of a layer of the transition material, then spread and level the transition material in layers inside the curb, and compact the layer by vib ' ratory roller horizontally

    巴西工程界在埃塔（ ita ）面板堆石壩建設中，借鑒道路園林工程中道沿機的擠壓滑模原理，創造性使用邊墻施工法，在每填築一層墊層料之前，用擠壓式邊墻機製作出一個半透水混凝土小墻，然後在其內側按設計鋪填壩料，用振動碾平面碾壓，合格后重復以上工序。
  8. Since the existed research has n ' t illuminated the failure form of post - embedded reinforcing steel bar bonding anchor and its mechanism, has n ' t systematic research on factors influencing the function of post - embedded reinforcing steel bar bonding anchor, and also failed to test on the long period validity of post - embedded reinforcing steel bar bonding anchor, it is very unfavorable for the spread and application of post - embedding technique. in the meantime, the fact that the present post - embedding anchoring material is of few kinds, high prices and still - to - be - improved performance has become the bottleneck of the post - embedding technique ' s development, which has restricted its further application and development. therefore, it is of great importance to develop a new type high - performance inorganic anchoring material with reasonable price and improved performance

    由於已有研究對后植鋼筋粘結錨固的失效形式、破壞機理未作出明確回答，對后植鋼筋粘結錨固性能的影響因素未進行系統研究，對后植鋼筋粘結錨固的長期有效性未予以試驗證實，不利於植筋技術這種新型結構加固技術的推廣應用，同時現有植筋錨固材料存在品種少、價格高、性能需要進一步改進和提高等局限性，已成為植筋技術發展的瓶頸，制約了植筋技術的進一步應用和發展，因此開發價格合理、性能優良的新型高性能無機質類錨固材料就顯得尤為重要和迫切。
  9. Through the experimentation for the physical performance of cfpb masonry under local compression, the author has observed the deformation and failure of cfpbm. based on the mathematical statistics and regression analysis of the experimental data, the author derived a feasible and common formula for counting the cfpbm ' s local compression strength regarding the different local compression locations, analyzed stress distribution of local bearing masonry under beams end, and provided the calculating formula on effective supporting length of beam end in brick masonry. as the results of experiments demonstrate, owing to the cfpb ' s own holes " system, the beneficial effects, the bounding effect of surrounding masonry and the spread effect of force, have not developed completely

    試驗結果分析表明：由於多孔磚自身的孔洞結構，砌體內部的圍箍作用和力的擴散作用未得到充分發揮，局壓強度雖較軸心受壓強度有所提高，但仍低於同情況下實心磚的局壓強度；當有上部荷載作用時，對砌體局壓有利的懸臂卸荷作用和內拱卸荷作用均不明顯，因此在推導梁端局壓強度計算公式時，未考慮此可能存在的有利影響，計算偏安全；局壓強度提高系數公式除採用規范公式（二項式）的表達式，還用對數式進行了回歸推導，得到了一個較為普遍的公式；論文還對梁端局壓的梁端有效支承長度計算公式進行了回歸推導。
  10. To verify their effectiveness, simulation studies are conducted to test the performance of the proposed turbo codes in awgn channels and flat fading channels. in these simulations, the modified max - log - map decoding algorithm and the golden - spread interleaver are applied

    模擬研究了採用優選擴散交織與改進的max - log - map譯碼演算法的turbo碼在加性白高斯噪聲（ awgn ）通道以及平衰落通道上的性能。
  11. We analyzed the anti - jam and band inside anti - interfere performance of the system, and the low probability intercept ( lpi ) of the traditional direct sequence spread spectrum ( dsss ) modulations in the uav platform ' s applications. so a new modulation technique using a multi - level pseudo noise ( pn ) code has been presented. the new multi - level pn code is built from a high speed pn code through a low passed filter ( lpf )

    分析了系統抗阻塞式干擾和抗帶內頻帶干擾的性能，以及常規bpsk qpsk - dsss調制在無人機通信中存在的安全隱患，提出了一種用多電平pn碼進行擴頻調制的方法：採用高速pn碼，經過低通濾波器，產生多電平pn碼進行直序擴頻調制，能在低信噪比情況下有效抵抗平方率檢測器對系統載波的檢測。
  12. In addition, hybrid spread - spectrum communication system is propitious to enhance anti - jamming performance of the system that is make up of direct sequence ( ds ) and frequency hopping ( fh ), and it can satisfy the require of anti - jamming of systems. it concentrate their virtue and overcome shortage in single spread spectrum style. this paper discusses the aspect in detail

    另外，將擴頻技術中應用最廣泛的兩項技術直序擴頻（ ds ）和跳頻（ fh ）結合在一起，構成混合擴頻通信系統，有利於提高系統的抗干擾性能，更能滿足系統抗干擾的要求，而且將跳頻系統和直擴系統的優點集中起來，克服了單一擴頻方式的不足。
  13. In this article, we introduce the basic principle of the self - encoded direct spread ( seds ) system, construct the model of the system, and analyze the main performances of the system, such as ber performance, self - interference, mai performance and so on

    本文介紹了自編碼擴頻系統的基本原理，構建了系統模型，並對其主要性能，如誤碼率性能、自干擾特性、多址能力和抗多徑干擾能力等作了分析。
  14. In addition, bit error rate ( ber ) performance of the m - ary orthogonal spread spectrum system based on i bit quantization is analyzed in this paper and the formula of ber is obtained. by comparing it with other several systems, some concerned conclusions about this kind of system are gained

    為了進一步的降低系統的規模，本文還就基於硬判決解調的多進制擴頻系統的性能進行分析和研究，得出了同步捕獲性能和誤比特性能與用戶數及信噪比的關系公式，並將其與其它幾種系統進行了比較，得出了有關的結論。
  15. Then, introducing something about spread spectrum technique. and deciding to select direct - sequence spread spectrum ( ds ) in underwater acoustic communications by comparing ds to fh according to the properties of underwater acoustic channels. after that, discussing something about rake receiver, simulating the path - search algorithms, synchronization circuits and rake receiver in low speed underwater acoustic communications and analyzing some major factors influencing the performance of systems

    然後介紹了rake接收技術的基本原理，並對rake接收系統中的路徑搜索和同步系統進行了討論和模擬分析，另外還對rake接收技術在低速水聲通信系統中的應用作了模擬分析，並討論了一些影響rake接收系統性能的主要因素。
  16. We build the baseband model of the ar self - encoded spread spectrum system both for a user and multi - user, and do a lot of simulation for the system. in addition, we discuss the performance deeply based on the simulation

    本文建立了單用戶及多用戶的ar自編碼擴頻系統的基帶模型，並在模擬結果的基礎上，對該系統的性能進行了更深入的討論。
  17. In this dissertation, researches on performance of variable spreading gain cdma with imperfect power control and uplink capacity analysis of limited maximal ratio combining macrodiversity in spread spectrum radio networks are carried out. the main originality in this paper can be summarized as below. 1

    本文主要內容涉及基礎研究和應用研究，其中包括： （ 1 ）進行了關于可變增益cdma （ vsg - cdma ）在非理想功率控制下的性能分析； （ 2 ）進行了關于宏分集無線網路cdma系統的功率控制和容量分析。
  18. Conventional detector ( single - user matched filter ) distinguishes each user by the crosscorrelation of their spread - spectrum codes. in practice, however, its performance is much deteriorated due to the existence of noise in channel and strong multi - access interference, i. e. near for effect. a new method using independent component analysis is proposed in this paper. the - received energy of signals is controlled effectively, thus the near - far effect is overcome as much as possible ; moreover, the effect that noise imposed on the detector is mostly reduced. simulations verify the effectiveness of this method

    傳統檢測器（單用戶匹配濾波）利用擴頻碼之間的互相關特性來區分各用戶信號.而在實際應用中，通道噪聲和近距離用戶對遠距離用戶的強多址干擾即遠近效應，使得接收機的性能受到很大影響.本文將獨立分量分析法引入傳統接收機，有效控制接收信號的能量，從而極大地提高了接收機的抗遠近性能，同時噪聲的影響被盡可能消除.模擬結果表明了該方法的有效性和可行性
  19. The technology of direct sequence spread spectrum / code division multipul access ( dsss / cdma ) are applied in the broadband code division multiplex wireless communication systems, which means transmitting data at the rate of 2. 048mbps using four e1 lines within the band of 20mhz. in this paper, the theory of the whole debice is first analysized specified for the system asic design and optimizing its performance

    寬帶碼分復用無線傳輸系統是採用直接序列擴頻/碼分多址（ dsss / cdma ）技術，在20mhz頻帶內實現四路2 . 048mbps的e1鏈路數據速率的無線傳輸。本文首先分析了整個數傳設備實現原理，針對系統asic設計和優化整機集成性能出發，提出並實現了基於fpga控制pm4314e1晶元的介面模塊完成對e1鏈路信號的監控和告警功能的改進方案。
  20. For example, shanxi unique weddings and funerals, which can travel in the embodiment of the truly unique local characteristics enable visitors to experience and feel, in order to attract more tourists, and shanxi embroidery, straw, and other hands crafts only spread in the community did not enter the market, this is the development of breadth, depth, not performance

    例如，山西的婚喪嫁娶別具一格，在旅遊當中就可以體現，把真正獨特的地方特色讓遊客能體會到、感受到，這樣才能吸引更多的旅遊者，還有山西的刺繡、草編等手工藝品只流傳於民間，沒有打入市場，這都是開發廣度、深度不夠的表現。
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