比優數 的英文怎麼說

中文拼音 [bǐyōushǔ]
比優數 英文
figure of merit
  • 比 : Ⅰ動詞1 （比較; 較量高下、 長短、距離、好壞等） compare; compete; contrast; match; emulate 2 （比...
  • 數 : 數副詞（屢次） frequently; repeatedly
  1. In this paper, the concept of acceleration ambiguity function ( aaf ) and acceleration resolution is put forward for the first time. using aaf, the effects of target ' s relative acceleration on several outputs of a linear - phase matched filter are analyzed, such as the output signal - noise - ratio loss, the doppler resolution, the constraint on optimal accumulative time ( opt ) and their tolerable limits

    論文首次提出並研究了加速度模糊函數和加速度分辨力的有關概念，並以加速度模糊函數為分析工具，詳細討論了加速度對線性相位匹配濾波器的輸出信噪比的損失程度、對多卜勒頻率分辨能力的影響程度、對最優相參積累時間的約束關系以及線性相位匹配濾波器輸出受加速度影響的容限等問題。
  2. The main contributions are as follows : ( 1 ) de ( differential evolution ) algorithm is proposed to invert the ocean acoustic parameters in shallow water in order to get faster and more accurate results than ga ( genetic algorithm ) and sa ( simulated annealing algorithm ). also a posteriori probability analysis method is applied to evaluate the uncertainty of inversion results. ( 2 ) maximum likelihood objective functions for broadband mfi are derived according to different conditions

    （ 2 ）根據不同的前提條件，採用似然比的方法推導了寬帶匹配場反演的最大似然目標函數；深入地研究了寬帶匹配場處理中的相干與非相干問題；在分析參數反演的敏感性之後，提出了淺海環境參數寬帶匹配場反演的多步優化策略，並與全參數反演方法進行了性能上的模擬比較。
  3. In this paper, ackerman steering linkage of double - wishbone suspension is taken as the study object, choosing the splitting joint and steering lever joint to carry out the design of optimization the mathematics models are established based on the multi - body system dynamics, applying its analysis method of kinematics to study the mechanism kinetic principles owing to more spatial factors considered, and calling off many hypotheses affecting the accuracy, compared with the traditional methods, the models are better to reflect the realistic motion principles, the results are more exact and applicable moreover, the force analysis is applied to the conduct mechanism the analysis method of dynamics in the multi - body dynamics is applied to study the forces applied on every component, working out the constraint reaction force of up and down ball joints, and developing the current computation program in the end, produce the upper wishbone geometry model in the ansys software package, meshing and carrying out the fea, testifying if the intensity of the wishbone meet with the requirements

    本文以雙橫臂獨立懸架的轉向傳動機構作為研究對象，選擇對斷開點和節臂球銷的位置進行優化設計，在此基礎上建立了基於多體系統動力學的導向機構和轉向傳動機構的數學模型，運用該學科的運動學分析方法研究機構的運動規律，編制了通用優化設計軟體。由於考慮了更多的空間因素，取消許多影響準確性的假設，因此建立的數學模型與傳統的方法相比更能反映實際運動規律，得到的優化結果也更加精確實用。此外，本文還針對導向機構進行受力分析，在建立該機構的空間動力學模型后，運用多體動力學中的動力學分析方法研究各個桿件的受力，計算出上下球鉸的約束反力，並開發出了相應的通用計算程序。
  4. After analyzing purple soil sampled from neijiang, leshan ofsichuan provinec and yuanmou of yunnan province, the contrast results of microbe quantity feature between surface and subsurface purple soil were obtained as follows. the content of soil organic matter, total and available nitrogen, phosphorous and potassium of surface was higher than subsurface, not relating to the type of purple soil and soil utilization way. the quantity of microbe _ bacteria, actinomyces and mould in surface purple soil was higher than subsurface, which indicated that the organic matter and airy condition in surface soil was more suitable for microbes growing. there was the same tendency in profile change of microbe quantity in purple soil located in temperate _ humid climate of sichuan basin in contrast with dry _ hot climate of yuanmou, yunnan. the nutrient situation of purple soil in sichuan basin shown that state of surface was better than subsurface, while in yuanmou of yunnan the state was on the contrary due to the degradation of surface soil

    實驗室對四川內江、樂山和雲南元謀不同類型紫色土表層和亞表層微生物數量特性的比較分析表明：土壤有機質、氮磷鉀全量及其速效量均表現為表層高於亞表層，與紫色土類型和利用方式無關；三大類土壤微生物細菌、放線菌和黴菌數量均表現出表層高於亞表層，表明紫色土表層的有機質和通氣性優于亞表層，適宜於這三大類微生物生長；溫濕氣候條件下的四川盆地和乾熱氣候條件下的雲南元謀其紫色土微生物數量的剖面變化具有相同的趨勢，唯土壤營養狀況在四川盆地紫色土中表現為表層優于亞表層，而在雲南元謀紫色土中由於表層土壤的退化作用表現為亞表層優于表層的相反情況。
  5. Optimized association rules are permitted to contain uninstantiated attributes. the optimization procedure is to determine the instantiations such that some measures of the roles are maximized. this paper tries to maximize interest to find more interesting rules. on the other hand, the approach permits the optimized association rule to contain uninstantiated numeric attributes in both the antecedence and the consequence. a naive algorithm of finding such optimized rules can be got by a straightforward extension of the algorithm for only one numeric attribute. unfortunately, that results in a poor performance. a heuristic algorithm that finds the approximate optimal rules is proposed to improve the performance. the experiments with the synthetic data sets show the advantages of interest over confidence on finding interesting rules with two attributes. the experiments with real data set show the approximate linear scalability and good accuracy of the algorithm

    優化關聯規則允許在規則中包含未初始化的屬性.優化過程就是確定對這些屬性進行初始化，使得某些度量最大化.最大化興趣度因子用來發現更加有趣的規則;另一方面，允許優化規則在前提和結果中各包含一個未初始化的數值屬性.對那些處理一個數值屬性的演算法進行直接的擴展，可以得到一個發現這種優化規則的簡單演算法.然而這種方法的性能很差，因此，為了改善性能，提出一種啟發式方法，它發現的是近似最優的規則.在人造數據集上的實驗結果表明，當優化規則包含兩個數值屬性時，優化興趣度因子得到的規則比優化可信度得到的規則更有趣.在真實數據集上的實驗結果表明，該演算法具有近似線性的可擴展性和較好的精度
  6. Compared with primary second sampling a / d converter, it realizes digital feedback by digital circuit and does n ' t adopt high accuracy d / a converter with complex technology and high price. it has many excellent qualities, such as high - integration, high - accuracy, widely used, low - price. it can be widely used in test and measure system, scientific instrument, iatric instrument, automatic test system etc. so popularizing this new type a / d converter has very significant meaning

    與原有的兩次采樣a / d轉換器相比，用數字電路實現數字反饋可不用技術復雜、價格昂貴的高準確度d / a轉換器，具有集成度高、準確度高、適用性強、價格低等優點，可廣泛應用於測量測試系統、科學儀器、醫療儀器、稱重儀器、自動測試系統等。
  7. 4. an roi coding method realized by foveation technology and two of its extended applications are presented. by unevenly upscaling the wavelet coefficients, the method can not only reconstruct the roi data priorly in a low bit - rate codestream, but make the progressive reconstruction of the image data more convenient for the human vision system

    該方法根據人類視覺生理特點，將小波變換系數進行非均勻的上移位處理，不僅能夠保證感興趣區域圖像數據在低比特數據流中的優先恢復，還實現了使圖像的漸進恢復過程更加適合人類生理視覺感觀特點的效果。
  8. Details : adopting intelligentized digital technology, it owns small eradiation power of apparatus, excellent interference immunity and good price - performance ratio, therefore, it is widely used in library and bookstore and the monitor rack is installed under the base board, convenient for moving

    採用智能化數字式技術，儀器發射功率小，抗干擾性好性價比優，因此廣泛應用於各圖書館書店監測架安裝于底板上，移動方便。
  9. Several materials with large coefficient of expansion were selected to make packaging components, and it was found that the packaging materials have good temperature sensitivity and compatibility with optical fibers. experimental accuracy and repetition of fbg temperature sensitivity and compensation were discussed. have selected several materials which has bigger coefficient of expansion to do packaging components, have made many temperature experiments, there have not flaws, such as aging, crackle, absciss layer, packaging materials have good temperature sensitivity and compatibility with optical fiber ; have designed the simple and practical packaging components, have performed a serials of experiments about accuracy and repetition of fbg wave - length, have obtained the first step conclusion ; have analyzed the result and made comparison between the result of different experiment, have summarized the best packaging effect and several rules to reduce mistskes

    本文所做的主要工作包括以下幾個內容：一、選取了常見的熱膨脹系數大的材料製作封裝元件，經過多次一80到80反復測試，封裝元件沒有出現老化開裂、封裝裂紋、空洞、離層等缺陷，封裝材料具有良好的溫敏穩定性及復用性，與光纖相容性較好；二、對光纖光柵進行簡單、實用的封裝處理，就封裝效果的優劣性、波長測量的準確度、重復性和封裝時產生的波長損失等方面進行了一系列的實驗，得出了初步的結論；三、對溫敏和溫度補償式封裝的實驗數據進行了詳細的分析和對比，從數字上對溫變過程中光纖光柵中心波長的改變及溫變曲線進行了定量的分析，在大量實驗數據分析結果的基礎上，總結出哪種材料封裝效果更好，以及如何有效的減小實驗誤差。
  10. Comparing tow methods of efficency pre - estimation, it finds out the new method fit for super - low specific - speed pump. acoording to the study and comparison on efficency and reliability, the thesis points out merits and faults of the 5 types of impeller, and draws a conclusion that the complex impeller and partly blocked - flow - passage impeller are fit for the impellers of super - low specific - speed centrifugal pump

    比較了泵效率預估的方法，提出了適合於極低比轉數泵效率預估的新方法，並對其性能要求的效率和可靠性兩方面進行了研究比較，指出了五種形式葉輪各自的優缺點，得到結論：復合葉輪和部分堵塞流道的一般葉輪適合作極低比轉數泵葉輪。
  11. The results show that the method is better than the method of counting prompt neutrons in distinguishing real and fake nuclear warheads

    數值模擬表明，這種方法比計數瞬發中子總數有較大的優點，可用來探測鈾為彈芯的核彈頭。
  12. An optimizing method with constant pressure ratio is initially applied to the mixed refrigerant cycle. this method greatly simplifies the calculation of the cycle, and is helpful in numerical optimization of various cycles, especially in the complex cycles

    本文首次採用混合工質製冷機循環的定運行壓比優化方法，大大減少了循環的計算量，為各種混合工質製冷機循環，尤其是復雜循環的數值優化奠定了基礎。
  13. In the designing of priority for the transmission ratio, the usage of gear ' s attest on transmission ration should be considered ; the average value is set as the evolution aim of the loss of driving power and the useful effectiveness. a simplified fuel - consumed economically model is used to simulate the fuel consumption while the automobile is in motion

    在變速器傳動比優化設計中考慮檔位使用率對變速器傳動比的影響，採用驅動功率損失率和有效效率利用率的加權平均值作為評價指標，用參數樣條函數模擬車速狀態下的燃油消耗量，提出了按變速器傳動比的使用率來確定汽車的加速和等速的比例，並將其作為實際工況來確定汽車的實際燃油消耗率。
  14. This paper analyses the material compose and the structure character of asphalt mixture, then calculates the function relation among asphalt, mixture and road performance, based on this, it puts up linear furl of the upon function relation, moreover, we developed the asphalt mixture design software under the delphi 5 development environment, the main function is to get high quality and cheap asphalt mixture, in the end, it offering a certain design of asphalt mixture and it reaches the same conclusion as spot observation

    論文在分析瀝青混合料的材料組成和結構特性的基礎上，分別考慮瀝青與混合料路用性能，集料與混合料路用性能的函數關系，在此基礎上進行線性疊加，並使用delphi5 . 0版本的程序設計軟體開發了瀝青混合料配合比優化設計軟體，對瀝青混合料的配合比從技術經濟方面得到最優化設計。研究同時以實驗結果作為案例分析，得到了比較滿意的結果。
  15. Through testing on the running efficiency of the software, and comparing it to the world famous software pgp we get the result that this software has obvious advantage in encryption, decryption, digital signature and signature verification

    通過對本軟體的運行效率進行測試，與國際上流行的pgp軟體比較，數據表明本軟體在加密、脫密、數字簽名、簽名驗證等方面的性能均優于pgp 。
  16. One of the strengths of the up is that provides some advice for when to create each type of model, and recent incarnations of the rup product includes significant advice for non - uml artifacts such as data models and user interface storyboards ( ui flow diagrams )

    Up的一個優勢是它提供了一些關於何時創建每類模型的建議，而且最近的rup具體產品還包括關于非uml工件的重要建議，比如，數據模型和用戶界面情節串聯版（ ui流圖） 。
  17. The improved ausmwk scheme was extended on the three - dimensional flow field. three complicated 3d flow which included a supersonic flow at the comer of the intersecting wedges, a hypersonic flow in the lifting - body configuration and a flow in the rotating frame were numerically simulated by using ausmwk. results showed that the improved scheme could predict the complex turbulent flow more effectively than the original one.

    通過與實驗數據的比較，數值結果詳細、準確地揭示了這幾個復雜流場的流動現象，證實了ausmwk格式的改進是成功的，發展的ausmwk格式繼承了ausm +格式優點，計算處理問題能力增強，可以有效地應用於亞聲、跨聲和高超聲流動的工程實際問題中。
  18. ( 3 ) according to the optimization calculated results, the structural parameters of zs1125 direct injection diesel engine are changed, and the experiments are carried out. the comparison of the diesel engine performance before and after optimization shows that the diesel engine ' s specific fuel consumption, exhaust temperature and smoke decreased, which reached research goal

    （ 3 ）按照優化計算結果，對zs1125型直噴式柴油機的結構參數進行了改進，並進行了試驗驗證，結果表明，優化后柴油機的油耗、排氣溫度和煙度比優化前有所降低，達到了本文研究的目的。
  19. The mathematical model of the single - phase full - bridge inverter is mentioned, and then the efficacy of pid control, deadbeat control, repetitive control, fuzzy control together with neural networks control for the ups inverter is compared. the pid control and repetitive control for the ups inverter are mainly focused. finally, a control scheme which requires ordinary hardware, with good robustness and high dynamic response is presented

    在分析單相全橋逆變器數學模型的基礎上，比較數字pid控制、無差拍控制、重復控制、模糊控制以及神經網路元控制等多種控制方法的優劣；重點研究ups逆變器的數字pid控制和重復控制，最後提出一種對硬體設備要求低、魯棒性好、動態響應快的ups逆變器控制方案。
  20. Wp - le series intelligent electric power instrument is a kind of new electric power display control instrument developed and produced by wideplus company. it has adopted advanced micro - processor as its core component, it has many characteristics such as precise measurement, visual and clear display, perfect performance, good stability, strong anti - interference capability, high universality and reliability, superior performance and favorable price etc, can replace the point type instrument or normal digital display instrument including the digit display instrument constituted by electronic discrete components and universal integrated circuit

    Wp le系列智能電力儀表是上潤公司開發生產的一類新型電力顯示控制儀表，採用了先進的微處理器作為核心部件，具有測量精確，顯示直觀清晰，功能完善，穩定性好，抗干擾性能強，通用性和可靠性高，性能價格比優等特點，可替代指針式儀表或常規數字顯示儀表包括由電子分立元件和通用集成電路構成的數顯儀表。
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