數據擾頻 的英文怎麼說

中文拼音 [shǔjùrǎobīn]
數據擾頻 英文
data scrambling
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 據 : 據Ⅰ動詞1 （占據） occupy; seize 2 （憑借; 依靠） rely on; depend on Ⅱ介詞（按照; 依據） according...
  • 擾 : Ⅰ動詞1 （擾亂; 攪擾） harass; trouble 2 （客套話 因受人款待而表示客氣） trespass on sb s hospital...
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 數據 : data; record; information
  1. This text studied the mutually interference influences to the aerodynamic force of irregular shape base on analysis using wind force and wind pressure data of super high buildings model obtained by wind tunnel tests, and provided reference to designer and expurgator on building code

    本文以超高層建築剛性模型的高頻天平測力風洞試驗數據和表面測壓風洞試驗數據為依據，研究了復雜外形建築的風力和高層建築相互干擾對風力影響，供設計者及規范修訂時參考。
  2. 4. the signal data collected in expteriment are taken out in emulational research of system experiment. many methods such as adding window in frequency field, eliminating static object and so on restrain the width and sidelobe of static mussy weaves and detect out the target availably

    4 、在系統實驗模擬研究中調出實驗採集信號數據，使用頻域加窗不加窗、清除靜態目標等方法很好地控制了靜態雜波干擾的幅度及旁瓣，有效地檢測出了目標。
  3. Shortwave channel is time varying transmission channel. it has dispersion in frequency and time domains. this characteristics hinds the data transmi - ssion at high speed and the correction of received data. in this dissertation i have analyzed the statistic characteristic of shortwa - ve channel, established the model of shortwave channel and simulated the rayl eigh fading distribution. the technology of spreading spetrum has been proved that it has the capability for anti - multipath and discerning multipath

    在短波通信中，由於通道的時間色散和頻率色散，引起多徑展寬和多徑衰落，前者限制了數據的傳輸速率，後者造成短波數據通信中出現突發錯誤，為了解決多徑效應對短波通信的影響，本文所做工作如下：首先詳細分析了短波通道的統計特性，建立其數學模型；其次分析了擴頻通信的特點，從理論上證明擴頻技術不僅具有抗多徑干擾能力，而且具有分離多徑的能力；介紹了傳統的rake分集合併技術的特點。
  4. In this thesis, for the merits of high frequency spectrum utility factor and high - speed data communication, the ofdm is introduced into the underwater acoustic communication. combined with fec to combat the frequency - selective fades and isi in the underwater acoustic channel, high speed data transmission is realized by employing ofdm technology

    本研究嘗試將ofdm技術引入水聲通信領域，利用該技術頻譜利用率高，多載波并行傳送的特點，結合通道編碼，以克服水聲通道多徑干擾引起的頻率選擇性衰落和碼間干擾，獲得高速率數據傳輸。
  5. The signal format of gps is analyzed, the principle models and mathematical models are established, the ber performance is analyzed in a channel interfered with wide - bandwidth awgn, narrow - bandwidth awgn, transmitted signal, single - tone signal respectively. based on the results above interference methods are discussed and simulated. then the performance of code acquisition and code trace of a digital gps receiver are discussed. the modem of linkl 1 and link4a are modeled and their ber performances are analyzed and simulated in channel s interfered with awgn, single - tone signal and multi - tone signal respectively

    建立了jtids的收發終端的數學模型，分析它在噪聲干擾、相關干擾、互相關干擾下的誤碼性能，提出較佳的干擾方法和干擾碼型，並進行模擬模擬；分析了gps的信號格式，建立了gps的原理框圖模型、信號數學模型，並對其在寬帶噪聲干擾、窄帶噪聲干擾、轉發干擾、單頻干擾等情形下的誤碼性能進行了分析比較，提出相對較佳的干擾方法，並做了計算機模擬，針對一數字式gps接收機中擴頻碼捕獲與跟蹤環的特性進行分析；建立了link11和link4a數據鏈調制解調數學模型，對它們在噪聲干擾、單音干擾、多音干擾等下的誤碼性能進行分析，最後對干擾情況進行了模擬模擬。
  6. A common data acquisition card can be used on laboratory virtual instrument engineering workbench through designing the external interface between labview and common date acquisition card on the software design ; used the idea of the double buffer and direct memory access, a real time data acquisition and logging about the succession, big capacitance leakage current is realized ; a digital filter is designed to filter high frequency signals

    在軟體設計上，設計了與普通數據採集卡的介面，實現了在labview環境中應用普通數據採集卡的功能；運用雙緩沖和內存直接映射的設計方法實現對連續、大容量泄漏電流信號的實時採集和存儲；設計了數字濾波器對採集后的原始數據濾去高頻干擾。
  7. By means of 4 dual - frequency gps receivers over china, the tec in the ionosphere during solar flare on nov 22, 1998 is calculated. the results indicate that the flare, the x - ray level of which is x3. 7, cause obvious tec enhancements in the ionosphere, the largest tec enhancement caused by the flare is about 1. 25 tecu. the characteristic of this method to study such ionospheric disturbances caused by flares is analyzed. it is concluded that this method can be used to study the ionosphere disturbances caused by solar flare, and can get more ionospheric disturbances information because of the special satellite constellation

    此次耀斑爆發引起了設在北京的高頻多普勒長達15min左右的無線電短波中斷。通過對gps得到的電離層tec進行分析發現：此次耀斑造成了大面積的電離層tec的增加，耀斑爆發引起的最大tec增幅在1 . 25個tec單位左右利用高精度的gps數據處理方法可研究耀斑引起的電離層擾動。另外，還分析了由gps計算的tec的時空變化特點。
  8. Experimental study on that 532nm 、 1064nm 、 1319nm 5khz frequency pw laser irradiate the ccd respectively. with the data of experiment, the thresholds of laser power density that induce ccd saturation, crosstalk and irreparability damage were calculated. the phenomenon that 532nm 5khz laser can induce part of ccd functional damage but absolutely damage was found

    根據實驗數據計算了532nm 、 1064nm高重頻脈沖激光使ccd出現飽和、串擾以及被破壞的功率密度閾值;實驗發現一定功率密度的高重頻532nm脈沖激光可以使ccd局部損傷而不致整體破壞;實驗進一步證實了1319nm激光不能使可見光ccd產生響應。
  9. In order to improve test precision, techniques such as auto - gain control, proper sampling rate select and dithering should be applied into the data acquisition process, and data pre - processing techniques should be used to eliminate data with careless error and correct data with system error

    為了提高測試精度，在數據採集中，可以採用量程自動切換、合理的采樣頻率以及加擾技術；對採集的數據，需要進行預處理，主要包括剔除含有粗大誤差的數據和消除系統誤差等。
  10. Our object is an intermediate frequency modem of a software defined radio transmitter - receiver of multi - service, multi - modulationmode and multi - processdatarate. first, related software defined radio theory is introduced ; later, channels of transmitter - receiver are designed with consideration of data format, modulation, fec, interwaving. and scrambling ; emphasis is placed on theory and implementation of an audio compression algorithm cvsd ( continuous variable slope delta modulation ) and a fec technique convolutional coding - decoding

    本文首先介紹了相關的軟體無線電理論；然後完成了包括數據格式，調制方式，糾錯碼方式，交織器和擾碼器等部分的中頻數據機通道設計；接著著重介紹了系統中使用的音頻壓縮演算法cvsd （連續可變斜率增量調制）的原理和實現，以及作為前向糾錯碼的卷積碼編碼理論和編解碼的高效實現。
  11. The research results are controlled source which has linear or nonlinear variabe frequency scan function and the seismic instruments which match with it, and the method of small group intervals, small offset, much more channels, short array length, high - frequency receivers are applied during the link of data acquisition, and that the techniques of the refraction static correction, the noise suppressing, the high - resolution velocity analysis, the wavelet length compression, the wavelet zero - phase, and the prestack migration should be applied emphasizedly during the link of data processing and interpretation

    研究表明，對于城市活斷層的抗干擾高解析度淺層地震勘探，在數據採集環節應採用具有線性或非線性變頻掃描功能的可控震源和與其相匹配的地震儀器，以及小道間距、小偏移距、多接收道、短排列和高頻檢波器接收的工作方法；在數據處理與解釋環節，要重視折射靜校正技術、噪聲壓制技術、高精度速度分析技術、子波壓縮技術、子波零相位化技術和疊前偏移技術等的應用。
  12. A new method for realization of multi - channel data acquisition on windows flat form is brought forward in allusion to the feature of hyper - low frequency with water pressure pulsation in hydroelectric sets. and various anti - disturbance solutions are adopted in connection with the detection environment. the device proved to be able to has been meet predetermined requirement by its engineering application

    針對水力發電機組水壓脈動超低頻特性，開發出一種在windows平臺上實時多通道數據採集系統，並結合測試現場環境，提出了抗干擾的各種措施.經實際運用，達到了預定要求
  13. The some fire control system is an advanced multi - senor short range air defense system, which integrated both x and ka bands searching and tracking radars, laser range finder, combined the control computer of subsystem with the master computer, and applied the technology of data fusion

    摘要某火控系統集兩個頻率波段的搜索雷達、跟蹤雷達和電視跟蹤器、激光測距機於一體，分系統控制處理計算機與系統主計算機相結合，採用了數據融合技術，是一部多傳感器集成的現代化防空系統，具有搜索性能好、反應時間快、抗干擾能力強、自動化程度高、使用性能好等特點。
  14. 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。
  15. The main technique of solid state memory system include the techniques of design for reliable and lower power dissipation and valid data sampling, data framing and encoding, data storing and retrieving on high speed, data disturbing and frequency difference processing

    星載固存系統設計的主要技術包括可靠性設計、低功耗設計、有效數據采樣、數據組幀編碼、數據高速存儲及回放，數據加擾，輸入輸出頻差兼容設計等技術。
  16. The last gives the target of this paper. chapter 2 introduces the theory of frequency - hopping and gmsk, at the same time gives out a feasible method of fh synchronization and data transmission

    第二章研究了跳頻系統的基本原理和參數特徵，並根據對實際戰場中的干擾分析和數傳同步的特點給出了一種跳頻同步方法和數據傳輸機制。
  17. Based on the analysis of vhf - rc, the method of applying chaos direct sequence spread spectrum communication ( cds - ssc ) to ahts has been studied and discussed in this thesis. in this method, cds - ssc, which combines chaos sequences ( cs ) of high rand quality with ds - ss excelling in resisting interferences, is used to realize the transmission of hydrologic data

    文中所述方法利用混沌直接擴頻通信的通信方式來實現水文數據的傳輸，即將隨機性能較強的混沌序列作為擴頻碼與抗干擾性較強的直接擴頻通信相結合，應用於水文自動測報系統中去。
  18. The anti - jamming performance of the modem is greatly improved by time - frequency modulation according to the applying case

    根據該數據機的應用場合，它採用時頻調制的方法使其抗干擾能力大大提高。
  19. By experimentation, it is shown that time - frequency modulation is efficient and effective, which has rake and fault tolerant capacities in passband. the modem has strong ability of anti - jamming and error - correction which can finish the mission of communication under poor channel qualitative properties

    經過實驗證明，時頻調制是一種簡捷有效方法，它具有很好的帶內分集接收效果和容錯能力，該數據機在通道質量很差的條件下，仍能完成數據通信的任務，具有很強的抗干擾和糾錯能力。
  20. Transmition velocity relys on the style of encode and modulation essentially during modern data transmition for the quality of using line bandwidth and the immunity of code ties on them tightly. but it is important that the velocity of data transmition reaches its limitation in fact for the interface of environment and cross - talk. so for the improvement of transmition velocity, we must analyze the characteristics of noise signal and the model of line deeply and then take some useful measures to better the immunity of modulation wave

    在現代通信的數據傳輸過程中，傳輸速率本質上是由傳輸的編碼方式和調制方式決定的，因為編碼方式和調制方式直接決定了線路頻帶利用率和碼元抗干擾能力的好壞，因而直接決定了傳輸速率；但是在實際應用過程中，數據傳輸速率是不可能達到理想狀況的，因為環境干擾、串音干擾等因素的存在使得線路的頻帶不可能被完全利用起來；因此，必須認真分析線路的噪聲信號的特性以及噪聲線路的模型，以便在編碼方式和調制方式中針對性的做一些改進措施以改善調制波形的抗干擾能力，使得傳輸速率能夠進一步提高。
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