approach frequency 中文意思是什麼

approach frequency 解釋
進近管制頻率
  • approach : vt 1 向…接近，走近；使接近。2 探討；看待，對待，處理。3 向…接洽[提議]。4 〈美國〉企圖收買。vi 臨...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. A novel protein immobilization approach for piezoelectric immunosensors based on the sam of derivative aa has been proposed, which is formed by coupling merca ptoprorionic acid ( mpa ) to alginic acid sodium salt via edc and nhs. ( 1 ) the tr antibody is immobilized via edc and nhs. comparing with the mpa sam method, this new approach shows greater frequency response and high sensitivity

    應用edc和nhs使褐藻酸鈉與胱胺偶合形成衍生褐藻酸鈉作新的自組裝材料，用於蛋白固定，應用這一新方法， （ 1 ）實現了轉鐵蛋白抗體分子的固定，並對轉鐵蛋白參考血清進行了測定，該方法可在0 . 08 25 . 7 g / ml范圍內對轉鐵蛋白進行測定。
  2. In this paper, we study an alternative approach by numerical calculation. at first, we introduce the fundamental principles and the basic components of the electron linear. second, we introduce a way of coupler testing - - three frequency method. and present a example of coupler testing. third, we use numerical calculation method to simulate several accelerator structures. the hfss code and mafia code is used to simulate a three - cavity accelerator structure. the two results are compared

    因此，尋找好的方法來設計加速結構耦合腔很重要。本文首先介紹了電子直線加速器的各相關基本理論和其基本組成部件。接著，介紹了現階段耦合腔測試中常用的一種方法? ?三頻法，並給出了測量加速器耦合腔的實例。
  3. Presents the model proposed for analyzing the vibration characteristics of shrouded blades and their calculation method by employing a wave propagation theory and modal synthesis technology coupled with a finite element method from the view point it is possible not only to conduct frequency modulation of the shrouded blades of a gas turbine, but also to utilize the friction effects between them to dissipate energy, thereby attaining the aim of vibration alleviation, as shrouded blades have been widely used in the design of high - speed turbomachinery, such as modern gas turbines and steam turbines, and with the shrouded blades forming an integral whole in a centrifugal force field, the vibration characteristics of the whole ring of blades are different from those of a single isolated blade, and this makes it essential to take into account the integral effect of blade shrouds, concludes from the calculation examples and engineering application that the above approach is valid and correct along with the possibility of considerably reducing the scale of calculation and analysis, and points out it is necessary to take into consideration the coupled effect of the whole ring of blades while the dynamic characteristics of shrouded blades is being analysed

    帶冠葉片不但能調頻，還可以利用葉冠之間的摩擦效應來耗散能量，達到減振的目的.帶冠葉片在離心力場中形成一整體，其整圈葉片振動特性不同於單個孤立葉片，需考慮葉冠的整體效應.利用帶冠葉片系統的循環對稱性，提出了採用波傳播理論和模態綜合技術，結合有限元方法研究燃氣輪機帶冠葉片振動特性的分析模型和計算方法.算例和工程應用證明了該方法是效性的、正確的，並可以大大降低計算分析規模.研究表明帶冠葉片動力特性分析時必須考慮整圈葉片的耦合效應
  4. Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core. the speech codec optimizes g. 729a codes and added voice activity detection of g. 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information. but only get the frequency information is not enough in cpt detector, this thesis introduces a method

    其中對語音編解碼器的設計採用優化g . 729a代碼達到設計要求，並在此基礎上加入g . 729b的靜音檢測模塊，以進一步降低網路傳輸帶寬;對回聲消除器的設計採用nlms演算法，通過設計自適應fir濾波器和語音檢測器達到回聲消除目的;對雙音多頻設計，信號發生端採用構造靜態參數表並通過二階正弦振蕩器產生信號，信號檢測端提取頻率信息以檢測信號;對呼叫進程音設計，除了類似雙音多頻的信號發生及頻率檢測設計外，還需要檢測信號持續時間，作者設計了一種基於匹配狀態表的方法以檢測信號持續時間。
  5. By the frequency with which the few speakers pointed in the direction of the encampment of webb, it was apparent they dreaded the approach of danger from that quarter.

    從有幾個人在發言時不斷朝韋布將軍營地的方向指指點點看來，顯然他們是擔心從這方面來的危險。
  6. The vibration of upper structure of bridge which caused by the dynamic action of vehicle pass the railway bridge may make the structural component fatigue and decrease the intensity and stability. the more vibration of bridge will influence the safety and stability of vehicles ; when the dynamic changing frequency of vehicle equal or approach to the free vibrational frequency of bridge, wh ich will make the resonance may intensify the response of bridge and vehicles

    列車動力作用引起橋樑上部結構的振動可能使結構構件產生疲勞，降低其強度和穩定性；橋梁振動過大可能會對橋上車輛的運行安全和穩定性產生影響；當列車的動力變化頻率與橋跨結構自振頻率相等或接近時，引起的共振可能會使車橋動力響應加劇。
  7. But at present, prior work on video content analysis is difficult of approach good result using video frequency data alone and is inapplicability to scene segmentation and video content classified

    但是，目前僅僅根據視頻數據來提取視頻內容難度很大。單獨依靠現有的視頻處理技術不能準確地分割視頻場景和對視頻內容進行分類。
  8. The degree of mixing and the rate of approach to uniformity will depend on the frequency of turnover of solids.

    混合的程度和達到均勻混合的速度，將由固體顆粒在單位時間內翻轉的次數來決定。
  9. We design the qmf based on the criteria of minimum frequency bandwidth and the qmf that possess linear phase, and give a example of a signal decomposed and restructured. 4. in the research of channel dropping filters, we use 5 rank butterworth filter to approach the digital filter. we design lc unpower netwok and rc power network. we manufacture lc lowpass and highpass filter ， and test their performance ; we simulate the appliance of the channel dropping filters in the system

    4 .在頻帶分割濾波器的設計方法中，用5階巴特沃斯濾波器逼近最小頻寬正交鏡像濾波器，對無源和有源濾波器進行了模擬設計；設計並製作了無源lc低通和高通濾波器，測試了它們的性能；並對分割濾波器在系統中的應用進行了計算機模擬。
  10. However, this approach is faced with two key challenges. first is the keen competition from fast emerging ports in southern china, in particular the prd region, which has been assessed in the latest round of the study on port cargo forecasts. one of the conclusions of the study was that although neighbouring ports offer lower monetary costs, ours has the advantages in terms of high frequency of callings, extremely efficient operation and associated logistics services

    首先是華南一帶的港口，近年冒升之勢甚速，儼然成為香港的強大競爭對手，其中尤以珠江三角洲的港口為甚；我們已透過最新的港口貨運量預測研究，分析這趨勢對我們的影響；研究結論指出，雖然珠江三角洲港口收費低廉，但香港卻在頻密的船期，作業迅速有效，以及物流增值服務上，較鄰近港口優勝。
  11. In chinese words take - out module we adopt an approach using the characters of chinese to pre - process the downloaded web pages, and an approach of max - matching and frequency statistics

    中文分詞部分採用了利用漢字的特點對文檔進行預處理的方法和基於詞庫的最大匹配法和無詞庫的頻度統計法相結合的方法。
  12. Based on the introduction and analysis of the approach of h ( subscript ) loop shaping, aiming at the problems that the weight functions are chosen by trial and error, and the synthetical performance index of the controller is hard to meet the frequency and time domain performance requirements, an improved weight function selection method is proposed based on engineering design and chaos optimization

    摘要在介紹和分析h （下標）迴路成形基本設計力法的基礎上，針對權重函數選取需要反復迭代、過程繁瑣、所得控制器難以同時滿足時域和頻域性能指標等問題，提出了一種基於工程設計、輔以混沌優化理論的權重函數選取方法。
  13. A concept - based approach is expected to resolve the word sense ambiguities in information retrieval and apply the semantic importance of the concepts, instead of the term frequency, to representing the contents of a document. consequently, a formalized document framework is proposed. the document framework is used to express the meaning of a document with the concepts which are expressed by high semantic importance. the framework consists of two parts : the " domain " information and the " situation background " information of a document. a document - extracting algorithm and a two - stage smoothing method are also proposed. the quantification of the similarity between the query and the document framework depends on the smoothing method. the experiments on the trec6 collection demonstrate the feasibility and effectiveness of the proposed approach in information retrieval tasks. the average recall level precision of the model using the proposed approach is about 10 ? higher than that of traditional ones

    為了獲取詞語在文章中的語義權重，解決詞語的同義、多義模糊問題，提升信息檢索的效率，提出了一種基於概念的檢索模型，模型中設計了一種形式化的文本內容表示框架，框架由2部分構成:文章的"領域"以及"情景與背景"信息，並由概念（形式化語義）加以表示.同時，提出了提取該概念框架的方法，給出了用於框架與檢索要求間匹配的兩階段平滑演算法.實驗表明，在trec6提供的小規模語料集下，採用所提出方法的信息檢索模型與傳統模型相比，平均召回準確率提升了約10 ? ，效果顯著，充分說明了基於本文描述方法構建的、以概念作為處理中介的信息檢索系統的有效性和可行性
  14. The frequencies of translational actuation influence the stability of the tethered mass system. when the frequencies approach the natural frequency of the system, the period of energy exchange decreases and the amplitude of the pendulum increase. when the frequencies equal to the natural frequency of the system, resonance appears

    變幅激勵的頻率對系統穩定性有較大影響，當變幅激勵頻率接近系統固有頻率時，系統面內外能量交換周期減小，擺幅增大;當變幅激勵頻率等於系統固有頻率時，系統面內外均出現共振現象。
  15. High frequency soft - switching conversion is an important subject of power electronics. it is a powerful approach of minimization of size and weight for power supplies

    高頻軟開關技術是電力電子學的一個重要的研究方向，是實現功率變換裝置小型化，模塊化的基礎。
  16. It is found that the electron beam may approach ideal bunching. high power microwave pulses with tunable frequency can be generated by post - accelerating the electron beam and carefully designing the extraction cavity. in terms of the pic simulation, the output power of 1. 25gw at 2. 2ghz and 480mw at 4. 4ghz in axial acceletron have been obtained

    用增加中間腔的辦法，大大提高了前兩階諧波電流分量，數值計算結果表明，其中一階諧波電流調制系數達到了140 ，二階諧波電流調制系數達到了68 ，通過改變提取腔的設計，可選擇不同頻率的輸出，其一次諧波頻率為2 . 2ghz ，輸出功率為1 . 25gw ，效率為9 . 33 ，二次諧波頻率為4 . 4ghz時，輸出功率為0 . 48gw ，效率為3 . 6 。
  17. The subject mainly studies the splitting phenomena of laser longitudinal mode and the transmitted resonant mode of fabry - perot etalon using electrically controlled birefringence of liquid crystal, so as to find a new approach to obtain the dual - frequency laser output

    本論文主要研究利用液晶的電控雙折射效應分裂nd ： yag激光縱模和f - p標準具諧振模，以尋求產生雙頻激光輸出的新途徑。
  18. The detection and parameter estimation based on high - order statistics are another approach for ds - ss / bpsk signals. in this paper, a sort of detectors based on fourth - order statistics slices are presented to detect the presence of signal and estimate the carrier frequency and symbol period of ds - ss / bpsk signal

    高階統計分析技術是檢測直接序列擴頻信號的另一途徑，本文提出了一類基於和四階統計量切片的ds - ss / bpsk信號的檢測與參數估計方法。
  19. Speech coding systems are generally based on narrowband speech at present, but its frequency is restricted in 200hz ~ 3400hz and its sample rate is 8khz. with the development of the wideband speech, its bandwidth which is from 50hz to 7khz causes the quality of speech communication to approach in the feeling of face - to - face conversation, and makes the speech natural, expressive and comfortable. hence, it ’ s quite significant in researching on wideband speech coding system. in recent 20 years, the dsp and its software development kit has improved greatly, but the price has fallen sharply, thus it has more and more widespread applications now

    隨著當今世界的飛速發展，寬帶語音越來越受到人們的青睞，因為它的50hz 7khz的帶寬使得語音通訊質量接近於面對面交流的感覺，大大提高了語音的自然度、表現力和舒適度。因此，開發研製基於寬帶語音的編解碼系統具有十分重要的意義。在過去的短短二十年裡， dsp處理器的性能得到很大的改善，軟體和開發工具也得到相應的發展，價格卻大幅度地下降，從而得到越來越廣泛的應用。
  20. Through the review of theories about capital structures of foreign countries, the paper compares developed with developing countries in the capital structures and analyzes the character of chinese listed company. based on ample data, the proportion of equity financing is much more than that of credit financing in the capital structure of listed company. it indicates that listed company ' s choice of financing approach has an intensive predilection of equity financing, which is far from “ pecking order ” of financing approach in matured market. at the same time, the efficiency of equity finacing is not hight, so is debt finacing. the funds raised from equity finacing changes high frequency and lacks restrict, and the efficiency of debt finacing from bank is not hight because of “ soft restriction ”. despite the debenture has a preferable restrict, it grows lentitudily in china

    大量數據說明中國上市公司融資結構中股權融資的比重遠遠超過債權融資，與成熟市場條件下公司融資方式的「啄食順序」不同，有著強烈的股權融資偏好。同時，中國上市公司的融資效率是低下的，不管是股權融資還是債權融資。股權融資募集資金變更頻繁，缺乏約束，資金使用效率不高;銀行債權融資存在軟約束，使用效率同樣不高;公司債券融資具有較高的約束力，但在我國發展受到限制。
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