難度系數 的英文怎麼說

中文拼音 [nándùxìshǔ]
難度系數 英文
degree of difficulty
  • 難 : 難Ⅰ形容詞1 （做起來費事的） difficult; hard; troublesome 2 （不容易; 不大可能） hardly possible 3...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 難度 : degree of difficulty; difficulty
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. In the same time the output torque can also be measured and controlled rapidly and accurately. due to the complex nonlinear relation between the applied electrical field and the torque, it ' s difficult to set up the model using existing physic and mathematic theories. however, artificial neural network can express discretional nonlinear relation and has ability of study, which provides a new concept and method to solve this problem

    由於波紋式電流變傳動機構的外加電場和電流變液產生的力矩間呈復雜的非線性關系，用現有的物理和數學理論來建模尚有一定的難度，而人工神經網路有表示任意非線性關系和學習的能力，給解決這類問題提供了新思想和新方法。
  2. Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece

    將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義
  3. It is just the difficulty that the strongly correlated electron systems can not be studied by analytical methods, a variety of simulative numerical methods come out sequentially. there are a few typical methods such as the exact diagonalization ( ed ), the qutum monte carlo ( qmc ), the variation monte carlo ( qmc ), the renormalization group ( rg ), and the density matrix renormalization group ( dmrg ) and so on

    正是強關聯系統遇到了解析研究的困難，各種數值模擬方法才相繼出現，最典型的數值方法有：嚴格對角化（ ed ） ，量子蒙特卡洛（ qmc ）模擬、變分蒙特卡洛模擬（ vmc ） 、數值重整化群（ rg ）以及密度矩陣重整化群（ dmrg ）等。
  4. In this work, some species of palmae cultivated in the xiamen botanical garden had been selected to be analyzed their genetic diversity with rapd ( random amplified polymorphic dna ) technique. according to the result of genomic dna amplified with pcr ( polymerase chain reaction ), genetic distance and similarity between different palm species were calculated on nei " s estimate of similarity and genetic distance. a primary but first time research at the phylogenetic relationships of some genera and species, the molecular classification and identification of some puzzling species of palmae was carried out through upgma ( unweighted pair group mean average ) cluster analysis of the genetic distance together with comparative study of the morphological structure characteristics

    本文在初步調查分析了棕櫚科植物在我國的自然分佈、引種馴化情況以及該類植物在廈門地區栽培應用狀況的基礎上，首次採用rapd分子標記技術，對廈門萬石植物園引種的一些棕櫚科植物的遺傳多樣性進行了研究，根據pcr對基因組dna擴增的結果，用nei ' s相似性系數計算了不同植物間的遺傳距離和遺傳一致度，通過對遺傳距離的upgma聚類分析，並結合形態分類的特點，對棕櫚科植物的屬、種間的系統分類關系和一些疑難種的分類鑒定進行了初步研究。
  5. There are two series interface installed on the os in advance, the one is called bsd socket designed by berkeley software, with the working mode of blocking synchronization, nonblocking asynchronization and polling, the other is named winsock designed by microsoft, worked via the way of windows message driven. as the foundation of process socket seizing technologies under microsoft windows, api ( application program interface ) hook technology is the core to achieve

    Windows進程套接字數據劫持技術的基礎部分， windows應用程序介面api掛接技術，該技術是實現操作系統不支持的特殊功能的應用程序的核心，有相當難度，與傳統的基於網路設備介面規范（ ndis ）的包過濾技術相比，該技術的不同之處在於它可以在應用層上對任意進程的網路輸入和輸出數據進行捕獲。
  6. All first 8 teams ( with a single exception of brasil duo ) performed the combinations of very high degree of difficulty

    所有的八個組合（巴西的一對是個例外）選用動作的難度系數都相當大。
  7. Finally, we can not use electric power but the engine of bus or subsidiary engine to drive air compressors of bus air conditions. because the change range of turnaround speed of engine is very wide, that brings difficulties in controlling the rate of flow of cold - producing medium. in the control of bus air - conditions, preventing evaporator from freezing to make the air - conditions work with high efficiency and controlling the temperature of railway carriage are the basic tasks in air - condition control

    與一般的建築空調相比，汽車空調的工作環境惡劣，條件差，控制難度要增加很多，主要體現在以下幾個方面：一是車外熱負荷變化大，難以確定控制參數；二是要求空調負荷大，而且要控制空調使其降溫迅速：三，不便於用電力作為動力源，必須用汽車發動機或輔助發動機來帶動壓縮機，當採用汽車發動機作為動力源時，由於汽車的車速變化大，發動機轉速的變化可從600r min到4000r min ，壓縮機轉速與發動機轉速成正比，其轉速變化高達7倍，給空調系統製冷劑流量控制帶來困難。
  8. Several numerical experiments are carried out to detect the actual steps and limitation for the velocity and depth parameter ' s ray inversion in the fourth chapter, and the we find that : a. the resolution capability of the layer ' s velocity change along both the top and bottom boundary is very poor. thus generally the vertical homogeneous layer model whose top velocity equal to that of its bottom boundary should be considered

    本文的第四章通過一系列模型試驗詳細探討了利用射線反演方法反演速度和深度參數的實際步驟，認為走時反演對速度層內頂部和底部速度變化的分辨能力很弱，僅僅依靠走時數據難以反演出層內頂部和底部的速度變化，故一般情況下應採用速度層底部和頂部速度相同的縱向均勻模型。
  9. Results showed : ( 1 ) if the proportion of water in the soil is lower than wilting coefficient, and if irrigating water is very little, ( irrigating water is spreading horizontally and vertically ) the relationship between the horizontal width ( x ) and the ? rtical depth ( y ) is remarkable. the equation is y - 0. 02 12x2 + l. 8546x - 17. 88. the related coefficient is r = 0. 9350

    結果表明： （ 1 ）在土壤含水量低於萎蔫系數的乾燥條件下，進行微量穴滴灌，滴灌點土壤濕潤面直徑x與最大垂直面滲透深度y呈顯著相關，數學模型為： y = - 0 . 0212x ~ 2 + 1 . 8546x - 17 . 88 ，相關系數r = 0 . 9350 （ 2 ）在微量補水灌溉情況下，只有灌水量大於4000ml /穴，才能使滴灌水滲透到20cm以下土層，達到作物根系集中層，否則水分很難被作物吸收，造成滴灌水的浪費。
  10. Rsa algorithm is a algorithm for public key instrument. its security based on the difficulty of dividing big prime number

    Rsa演算法是一種公開密鑰演算法，它的安全系數取決于大素數分解的難度。
  11. So the plate - like drawing correcting process can be divided into two stages : absolute errors checking and comparative errors checking absolute errors checking include four modules which were line - weight checking, hatch checking. dimension checking and overlapped line checking comparative errors checking module include drawing compartmentalization, view recognizing, data getting and data compare in this correction system, line - scanning and circle - scanning algorithm, direct graphics element compare algorithm and character compare are used, which simplify the process and reduce difficulties

    相對錯誤檢查包括區域劃分、視圖識別、數據提取、數據提取等過程。相對錯誤的判斷依據是答案圖。本批改系統採用直線和圓弧掃描演算法，並且結合圖形元素直接比較法和特徵比較法，既簡化了處理過程，又降低了處理難度，比較圓滿地完成了開題報告確立的任務。
  12. Data is typically stored in many different data storage systems, and extracting data from all sources and merging the data into a single, consistent dataset is challenging

    數據通常存儲在很多個不同的數據存儲系統中，從所有源中提取數據並將其合併到單個一致的數據集中確實有一定的難度。
  13. For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics

    利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0
  14. This subject belongs to three - dimensional layout problems with behavioral constraints theoretically and concerns the knowledge of spacecraft design, mechanical engineering, computer science, mathematics, mechanics and system engineering. so it can be ascribed as the frontier fundamental and applied research of cross - discipline subject with np complexity theoretically. in term of engineering practice, this subject has extensive applications, such as layout design of spacecraft module, engineering machinery, submarine and shipping, tank, under - water suspension engineering, platform of marine drilling well, bullet train, multiple spindle box of machine tool, robot

    該課題在理論上，屬帶性能約束的三維布局問題，涉及航天器設計、機械工程、計算機、數學、力學和系統工程等學科，為交叉學科前沿課題的基礎理論和應用基礎研究，具有np難度；在實踐上，具有廣泛的工程應用背景，如航天器艙、工程機械、潛艇、船舶、坦克、水下懸浮工程、海上鉆井平臺、高速列車、組合機床多軸箱、機器人等的布局方案設計問題。
  15. The development of hev energies management system not only needs ecu technology, math ' s model, software technology etc, but also has much work to do on actuator of design and manufacturing

    開發混合動力電動汽車多能源控制系統不僅在ecu技術、硬體設計、數學模型、演算法和軟體技術方面要求很高，而且在執行部件的設計與製造等方面都是難度較大的工作。
  16. Four duos ( china, usa, canada and japan ) had equal dd

    有四個隊採用相同的難度系數（中國，美國，加拿大，日本） 。
  17. Because of the demand of combining new system and old system, the workload is heavy, difficulty coefficient is high, but design is perfect

    該系統由於是新舊系統的結合，因此，工作量極大，難度系數高，設計完整，確有商業性推廣價值。
  18. For example, bridges is not a story of adultery ; it is a story about the hardest kind of decisions, those involving matters of the heart

    比如說， 《廊橋遺夢》講述的絕對不是一個「通姦」故事；它講述的難度系數最高的「選擇」 ：來自靈魂深處的悸動。
  19. That happened not because of any mistake, but because of the degree of difficulty ( dd ) : the first combination performed by the two - time olympic champion wasn ' t strong enough

    不是因為動作失誤，而是因為難度系數：兩度奧運冠軍的第一跳難度系數不高。
  20. The australians received marks of 7. 5 and 8. 0 for their final effort, and a forward 2 1 / 2 somersault with two twists that equaled the highest degree of difficulty of any dive in the event

    澳大利亞人在最後一跳中獲得了7 . 5分和8 . 0分的成績，所做的動作是一個前翻騰2周半加上兩個轉身，其難度系數是這個項目中最高的。
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