conventional spread 中文意思是什麼

conventional spread 解釋
常規排列
  • conventional : adj 1 因襲的，傳統的。2 習用的；平常的，常規的；形式上的。3 約定的，協定的；會議的。n ism 依從俗...
  • 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...
  1. Three wheat cultivars, yannong 19 ( with spread plant type ), jimai 20 ( with semi - spread plant type ) and taishan 23 ( with erect plant type ), were used to investigate the wue ( water use efficiency ) change under raised bed planting with furrow irrigation and conventional flat planting with flood irrigation

    摘要為尋找提高小麥水分利用效率的途徑，以株型擴張品種煙農19 、株型緊湊品種泰山23和株型半擴張品種濟麥20為材料，比較研究了壟作（小水溝內滲灌）和平作（大水漫灌）兩種栽培模式下小麥的水分利用效率。
  2. Conventional seismic data processing method uses hyperbolic equation to describe time - distance formula of reflection wave, error of this equation increases with the increase of heterogeneity, anisotropy and spread length

    常規地震資料處理方法是利用雙曲線方程來描述反射波時距曲線規律，此方程隨著地層非均質性、各向異性和排列長度的增加，其誤差變大。
  3. In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition

    本文首先概述了自編碼擴頻通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論，然後針對自編碼擴頻通信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼，並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬，分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下，可以獲得較短的捕獲時間和較大的捕獲概率。
  4. In such condition the ideal productivity could not became true let alone industrialization. conventional methods such as cuttage, graft, layer, have been used for nearly 2000 years by the most people. they are simple and easily spread, but with low propagating speed

    植物非試管高效快繁技術（ ternpc ）無論在西北的沙漠荒地，東北的黑土地，華南的紅土地，還是華北華中大地均已燃起了大面積推廣的燎原之火。
  5. In the system, the low voltage power line is the first signal tunnel without any other relay equipments between customer terminal and substation collector, public telephone line serves as the second signal tunnel between substation and management center computer. as a breakthrough of conventional concept of electricity meter, this thesis initiate a new concept, namely, intelligent power customer terminal ( shortly, customer terminal ), which is developed with spread spectrum plc communication functional and possesses many advanced functions, such as, in addition to electric energy acquisition, guarding against electricity pilfering, preventing wrong connection, protecting malfunction, remote communication ( for example, remote power supply or halt, remote configuration of electricity meter, remote load control, etc ), and so on

    本文首先系統地總結了目前國內外低壓電力網數據傳輸技術的研究現狀和存在的問題，在此基礎上，從理論上論證了在低壓電網上應用擴頻載波數據通信技術的可行性和優越性，並重點論述了擴頻載波技術抗電力線噪聲干擾的機埋；本文提出了一個新穎的基於低壓電力線擴頻載波通信技術的集中遠抄系統的總體方案，即由用戶終端、集中器和電能管理系統所組成的網路系統，其中，用戶終端到配變集中器用低壓電力線作為通道，中間無需其他硬體中繼設備，集中器到電能管理系統用公用電話網作為通道。
  6. As the targets flying in groups may spread over several range of cells and their doppler frequencies are time *. varying, a scheme of target number detection in groups on a conventional low *. resolution radar is proposed based on a time *. range *. doppler image cube which is constructed by substituting a time *. frequency transform for the fourier transform in the conventional range *. doppler imaging

    針對實際編隊目標在距離上的分佈特性和目標多普勒頻率的變化規律，利用聯合時頻變換代替傳統傅立葉變換，建立目標時間-距離-多普勒立體像，提出一種基於立體像的目標架次檢測方法。
  7. In the gucheng ( ancient city ) oil field, where isotope trace injection profile test is not suit for, by having applied and spread the temperature method injection profile testing technique, a comparatively accurate injection profile result has been got. furthermore, during the process of dynamic monitor in steam injection development reservoir, the testing technologies of general well ' s temperature throughput profile in injection steam throughput production well and general well ' s temperature taking in steam profile in intermission steam pushing injection steam well are initiated, which having extended the applied field of the conventional temperature logging equipments, reduced the dynamic monitoring cost of thermal production reservoir greatly and provided much accurate and reliable data for the study of reservoir ' s behaviors and adjustment of developing projects

    在不適宜進行同位素示蹤吸水剖面測試的古城油田，推廣應用了井溫法吸水剖面測試技術，取得了較為準確的吸水剖面，而且在注汽開發油藏動態監測工作中，首創了注蒸汽吞吐採油井普通井溫法吞吐剖面測試技術和間歇汽驅注汽井普通井溫法吸汽剖面測試技術，拓展了普通井溫測井裝備的應用領域，大大降低了熱採油藏動態監測成本，為油藏動態研究和開發方案調整提供了大量準確可靠的資料。
  8. 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
  9. Secondly, we analyse the anti - jamming performance of coherent csk system and non - coherent dcsk system under a narrowband sine wave jamming, and analyse the performance of chaotic communication system under coexisting with a conventional spread spectrum communication system, such as direct - sequence spread spectrum ( ds - ss ) system

    其次，詳細分析了相干csk系統和非相干dcsk系統的抗窄帶正弦干擾能力，以及與傳統擴頻通信系統（以ds - ss為例）共存時，傳統擴頻通信系統對它們的影響。
  10. If the target has a radial acceleration, conventional 2d - fft based data processing method will lead to a doppler spread in doppler domain. the high resolution of doppler domain due to coherent integration no longer holds, which is very important in target detection of othr

    常規的二維fft處理在處理機動目標時往往由於目標存在徑向加速度而會在多普勒域造成多普勒擴展，從而無法應用相干積累帶來的多普勒域的高分辨力完成對目標的檢測。
  11. The development of our era requires the breakthrough of the conventional module which solely stresses the consolidation of basic knowledge and the integrity of the basis, long - run development and originality. to attain this, the research strategy in learning and teaching must be implemented. furthermore undoubtedly, the wide spread of the new syllabus and textbooks is the innovation of the almost 100 - year - old teaching of chinese. but in order to fulfill the spirit of the new syllabus more efficiently and utilize the new textbooks, we must modulate the way of thinking and attempt to seek ways from the strategy of research learning. generally the nmet papers in the last few years indicate that the gradual emphasis of the research capability of the testees. thereby, the introduction of the research strategy into the course of the chinese teaching is an urgent demand of the preparation of nmet

    時代的發展要求我們打破只重基礎性學力的傳統模式，在教學過程中把基礎性、發展性與創造性學力完美地統一起來，要做到這一點，就必須採用研究性學習的教學策略；新大綱、新教材的推行，無疑是對近百年來語文教育的變革，而要在更高層次上落實新大綱的精神，更好地使用新教材，還必須調整思路，從「研究性學習」的教學策略中尋找出路。縱觀近幾年來的高考試題，可以發現試題均逐漸突出對研究性能力的考查。可見，在語文教學中引入研究性學習的教學策略也是高考備考的需要。
  12. In this thesis, a kind of software method is researched to realize the functions of fast acquisition, tracking and demodulation of pcm - cdma - bpsk intermediate frequency signals. conventional research on spread spectrum signals is in the case of ideal conditions, such as low code rate, narrow dynamic range, narrow frequency - changing range and so on

    本論文將介紹一種軟體模擬硬體的方法來實現pcm - cdma - bpsk中頻信號的快捕、跟蹤和解調。關于擴頻信號的傳統的研究是在理想的條件下，比如低碼率、窄動態范圍、窄頻率變化范圍等等。
  13. 2. the characteristics of pseudorandom spread spectrum sequence in the dsss / bpsk signal exhibit the essential difference between the dsss / bpsk signal and other conventional signals in communications

    2 . dsss / bpsk信號中擴頻偽隨機序列的特徵體現了dsss / bpsk信號與其它常規通信信號最明顯的區別。
  14. The conventional single user detector matches the spread - spectrum codes for each user completely according to the classic theory of directe - sequences spread - spectrum ( ds - ss ) theory, so its ability to resist mai is poor

    傳統的單用戶檢測技術完全按照經典直接序列擴頻理論對每個用戶的信號分別進行擴頻碼匹配處理，因而抗mai能力較差。
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