頻發突變 的英文怎麼說

中文拼音 [bīnfātūbiàn]
頻發突變 英文
recurrent mutation
  • 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...
  • 發 : 名詞（頭發） hair
  • 突 : Ⅰ動詞1 （猛沖） dash forward; shoot out 2 （高於周圍） protrude; bulgeⅡ副詞（突然） abruptly; sud...
  • 突變 : 1 （突然急劇的變化） sudden change; change suddenly; transilience; accident; saltation; revulsion...
  1. When the cur - cuit resets, the chip remains accepting state, works in burst mode, and adopts dpsk modulation mode. it proceeds quadrature - sampled intermediate frequency signal after the ad9057 has converted, then down - converses, despreads and demodulates. the demodulated baseband signal will be sended into scm to dispose through interrupt

    上電復位后，晶元處于接收狀態，工作在突發模式下，採用dpsk調制方式，將ad9057轉換完的中頻信號進行復正交取樣後下變頻、解擴、解調，通過中斷將解調完的基帶信號送入單片機處理；處于發送狀態時，可將數據擴頻、調制，經ad9768送出。
  2. In view of the limitation of the traditional inversion theory and method of the gravity and magnetic field, professional an yulin, etc, worked in china university of geoscience, has come into being the theory system of the all - direction imagery for local gravity and magnetic sources after having researched a few years. the theory system broke through the thinking method of traditional theory system, researched all - direction imagery of the 2d local gravity and magnetic sources by means of complex function theory and researched all - direction imagery of the 3d local gravity and magnetic sources by means of spherical harmonic analysis theory, developed greatly the interpretation theory on the gravity and magnetic field

    該理論體系突破了傳統的重、磁場解釋理論體系的思維方式，採用復變函數理論研究二維局部重磁場源全方位成像，採用球諧分析理論研究三維局部重磁場源全方位成像，大大發展了重磁學科解釋理論，可以在起伏地形、有背景疊加和高頻干擾等復雜條件下，直接反演加疊代修改，求解分佈在有限范圍內的二維和三維重磁場源異常場的多種反演問題。
  3. The author utilizes catastrophe theory to explain the high magnitude mechanism by non - linear resonance model. 5. in order to know the stress distributing of river, the author simulates the field by finite element analysis

    為了合理解釋水庫蓄水后，地震頻度增大、地震震級增大的現象，本文將非線性共振突變理論引入，對高震級水庫地震的誘發機理進行了新的探索。
  4. Wavelet transform is a kind of time - frequency analysis method in signal processing and is becoming more and more popular during these years. its multi - scale property, localization both in time and frequency domain, sensitivity to the abrupt change of signals, and good to denoising make it an ideal way for edge detection

    近幾年來迅速發展起來的小波分析，由於其具有時頻局部變換的特性及多尺度性，能敏感地反映突變信號及良好的去噪效果，因此能準確、有效地確定圖象邊緣位置，因此是一種理想的邊緣檢測方法。
  5. The transmitter does the work of a burst transmission, its encoding and framing are all implemented in the link control part, the base - band process part does the spreading, fir filtering and up frequency conversion

    發射機實現一個突發傳輸過程，編碼和組幀都在鏈路控制部分實現，基帶處理部分做擴頻、 fir濾波和上變頻的工作。
  6. The design and application of ad6640 and ad6624 are fully discussed in this part. the design of software module includes the parameter design for ddc filter and the baseband signal processing of dsp. and the realization of the viterbi channel decoding algorithm by dsp and the simulation of the burst at the transmitter are discussed

    模塊的硬體設計主要包括： a d轉換器、數字下變頻器（ ddc ）以及dsp ，詳盡討論了a d器件ad6640和ddc器件ad6624的設計和應用；模塊的軟體設計主要包括： ddc濾波器參數設計和dsp的基帶信號處理，給出了viterbi通道譯碼演算法dsp實現和發射端突發形成的模擬實現。
  7. The research showed that : from january to march, the acreage average ozone gross gathered, which was synchronized with the increase of the frequency of strong ssw event. furthermore, the change tendency of ozone gross in the atmosphere break forward and backward 1990. after the1990s, ozone gross in the atmosphere appeared negative anomaly in the mid and high latitude of north hemisphere from january to march, which was consistent with the obvious descent of appearance frequency of strong ssw event after the 1990s

    分析表明： 1至3月，臭氧總量的面積平均逐漸增高，這與強ssw事件頻數1至3月增高同步；此外，大氣臭氧總量趨勢變化以1990年前後存在明顯的突變， 90年代以後，北半球中高緯1 ? 3月間大氣臭氧總量處于負異常階段，這和90年代以來強ssw事件發生頻數明顯下降相吻合。
  8. Firstly, we analyze the transient and steady character of single phase high - impedance grounding fault. secondly, based on wavelet analysis on checking mutational signal and direction high frequency protection theory, utilizing zero sequence current and module current, this paper provides a new scheme including fault starting element, fault phase selection element, directional element and main criterion. this scheme can bear high impedance and is immune to system surge and frequency warp, which gets over the shortcoming of the lack of sensitivity

    由於現有的保護方案無法快速有效地切除此類故障，本文在詳細分析了單相高阻接地故障的穩態和暫態特性的基礎上，從小波分析原理出發，利用小波變換檢測突變信號的原理，以零序電流、模電流等為研究對象，結合方向高頻保護的原理，設計了一套包含啟動元件、選相元件、方向元件、主保護的保護新方案。
  9. In order to establish the genetic transformation system of saussurea medusa maxism by agrobacterium rhizogenes, some work were done. the main results were following : 1 establishment of regeneration systems two systems of regeneration from saussurea medusa maxim were established without cold treatment. the somatic embryos were induced from callus cultured in mise for 35 days. the shoots were induced from cotyledon after cultured in misc 20 days, and from leave which were cultured in misl. the experiment showed that the carbon and glycine in the medium could help to increase the regeneration rate to 95 %

    為篩選水母雪蓮代謝突變體和轉基因研究奠定了一定的基礎，陳亞瓊： m質粒介導水母雪蓮的遺傳轉化及毛狀根中決刪合成的調節p義摘要也為研究類黃酮代謝途徑的關鍵酶基因的轉化、高效表達及作用機理提供了理想的實驗體系。主要的實驗結果如下： 1水母雪蓮高頻再生體系的建立通過體細胞胚胎發生途徑和器官發生途徑，水母雪蓮（ squssureamedusamaxim ）可以在常溫下獲得再生植株。
  10. Using this system, we have studied matrine - inhibittory effect and trifluoperation - neuroprotection effect in hippocampal slices, also discussed the mechanism of long - term potentiation using anesthetic rats. the experiment results showed that matrine can inhibit the hyperactivity induced by penicillin sodium in dosage by changing the relative parameters of field potential ; trifluoperation can alter ps change with the time, enhance the degree and the ratio of ps recovery, then minis the hypoxic injury ; high frequency stimulate can increase ps amplitude and epsp slope for long time, buildup the in / out function of nerve cells, and enhance synaptic plasticity

    結果表明，苦參堿能夠劑量依賴性地抑制青霉素誘導的神經元順向信號傳導激活過程，使細胞外記錄到的場電位各個參數發生相應改變；三氟拉嗪可以改變ps的時相變化，提高ps的恢復程度和恢復率，減小了神經元因缺氧引起的不可逆損傷；高頻刺激（ highfrequencystimulate ， hfs ）可以長時間的增強ps的幅度和epsp的斜率，進而增強神經元的輸入輸出功能，增加了突觸的可塑性。
  11. An expression vector with fragment 9 in antisense orientation was constructed to block the expression of the relevant gene ( fragment 9 related gene, fnr gene ) in vero cells. interestingly, we found that the nontargeted mutation frequency induced by mnng was increased significantly, implicating that the product of the blocked gene may be involved in the inhibition of nontargeted mutation

    利用反義核酸技術構建含反向插入9號片段的真核細胞表達重組體並轉染細胞，以獲得反義rna阻斷vero細胞中相應基因的表達，發現mn 』 ng誘發的非定標性突變頻率顯著增高，提示被阻斷的相關基因的表達產物可能參與抑制非定標性突變的發生。
  12. The theoretic calculation shows the analysis mothed of wavelet packet not only can confirm the abrupt change point of the signal, but alse can confirm the fault degree and time in all frequency spectrum

    理論計算表明，應用小波包分析技術不僅可以確定信號的突變點，而且可以在全頻范圍內確定信號的突變發生的時間及程度。
  13. It adapts to the cdma system and achieves multi - rate speech coding and decoding. source and mode control are combines in smv for rate selection, so it improves the flexibility of cdma system, it will allow cdma subscribers to enjoy superior quality while allowing service providers to increase capacity as needed. smv is regarded as a breakthrough technology that provides significant capacity and quality gains on cdma systems, so the researching of smv is of great practical value

    可選模式聲碼器（ smv ? selectablemodevocoder ）是3gpp2最新的用於寬帶擴頻cdma通信系統的變速率語音編碼標準，它實現了語音的多種低速編碼和解碼，在速率選擇上將源控和模式控制相結合，提高了cdma系統的靈活性，可以在保證高質量語音的同時盡可能增加系統的容量，被認為是變速率語音編碼在cdma系統中應用的「突破性」技術，代表了當前語音編碼發展的方向和潮流，因此smv的研究具有很大的價值。
  14. Undoubtedly, deterioration and damage accumulation occur in high temperature and high pressure. with the consumption of their use, the failure accidents occur more frequently, which will bring threatening to the life of people and the poverties of enterprise. so the failure analysis and the residual life assessment of the main steam pipe become more and more urgent and important

    以蠕變性能作為設計指標的主蒸汽管道是發電廠的關鍵部件，由於長期在高溫高壓的惡劣工況下運行，容易發生材質老化和損傷積累，突發性事故也會頻頻發生，給企業職工的生命安全和國家財產帶來嚴重威脅，因此對主蒸汽管道進行失效分析與壽命預測尤為迫切和重要。
  15. The products were used in rflp analysis. we found the g849a nonsense mutation that was responsible for the se enzyme inactivation in shandong han chinese and mongolian of inner mongolia individuals was in the same frequency, 0. 55 %

    結果在兩個人群中均發現了一個攜帶g849a點突變的個體，該點突變產生的無功能等位基因se ~ （ 849 ）在兩個人群中的頻率均是0 . 55 。
  16. All these techniques have got great success to prevent the railway froni the disasters, but these are not enough. now, the disasters, with the higher frequency and the bigger size, because of the complex environment and deteriorative ecological conditions, occur along the railways sometimes

    但山區鐵路沿線自然條件復雜多變，沿線生態條件總體趨于惡化，災害事件發生的頻度和規模有加大的趨勢，災害的突發性、群發性強。
  17. This paper gives us too ways ： one is to adopt a better modulation mechanism, s - cdma, to bate noise jamming. the other way is to implement automatic frequency agility under strong noise, based on the ranging and burst configuration mechanism of current docsis protocol, meanwhile, guaranteeing cmts ' s normal operating. this paper comprehensively analyzes the anti - jamming mechanism of docsis, then presents the specific implementation of the latter method

    如何降低噪聲對網路的危害，本論文指出了兩個方向，其中一個就是在調制體制上下工夫，採用s - cdma體制，通過改變調制方式來主動的抑制噪聲的影響；另一個方向就是基於現在協議提供的抗噪聲干擾的機制，充分挖掘測距機制和靈活的突發配置機制的抗干擾潛力，以不影響頭端設備的正常運行為前提，以它們為基礎實現能自動避開強噪聲干擾的頻率轉移。
  18. However, the inherent shortcoming of piezoelectric transformer hinders its further development. the major problems include : ( 1 ) the development and design of the piezoelectric transformer involve in lots of theoretic aspects including the design of material, dimension, electrode and circuit ; ( 2 ) it is hard to harvest high voltage enhancement ratio and high - power output simultaneously ; ( 3 ) the operation of the piezoelectric transformer is strongly dependent on the resonance frequency, which leads to the difficulty in the design of driving circuit

    但其自身所存在的固有缺點也在很大程度上限制了壓電變壓器的進一步發展，突出的問題有:壓電變壓器的研製包括材料設計、尺寸設計、電極設計和電路設計等多個環節，所涉及的理論面很廣;壓電變壓器的高陞壓比和大功率輸出難以同時得到保證;壓電變壓器的工作過多地依賴于諧振頻率，為外部電路的設計帶來了困難。
  19. But technology is usually a two - side sword, web media brings the human being much benefit ; at the same tune, it seems as if opening the padola box, its " negative effect is obvious : the direct of the public opinon is not clear ; the deed of violating power off often happens ; fictitious news and fithy information are flooding. information trans ceding the region and the national boundaries makes the opion of ethics between the west and the east communicate and collide. at the same time, international media produces a new monopoly

    但是，技術從來都是一把「雙刃劍」 ，網路傳播在給人類生活帶來巨大便利的同時，也如同打開了潘多拉的盒子，其負面影響日益顯著：輿論導向模糊；侵權行為頻繁發生；虛假新聞和色情信息泛濫；信息的超地域、超國界流動使得東、西方倫理觀遭遇空前的交流和沖撞，國際傳播產生新的壟斷… …網路技術飛速發展和信息流動的瞬息萬變使得上述倫理沖突幾乎是在一夜之間凸現出來。
  20. Before rock failure, it is found that ae distributed densely, and the coming fracture will occur in the density center of high magnitude events, and ae ratio of frequency grows greatly. these precursors can be presented by the change of b value, a t value and the contour of v value. prefab crack systems in the specimen will affect the fractures hi rocks

    關于巖石破裂過程中一些物理量的變化，發現在巖石破裂前，主破裂發生的區域先出現大能級聲發射的密集分佈；在巖石加載的臨界狀態，大能級的聲發射數量大量增加；在接近臨界時，大能級聲發射事件在失穩前頻度突然加快。
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