顯式動力學 的英文怎麼說

中文拼音 [xiǎnshìdònglìxué]
顯式動力學 英文
implicit springback
  • 顯 : Ⅰ形容詞1 （明顯） apparent; obvious; noticeable; evident 2 （有名聲有權勢的） illustrious and inf...
  • 式 : 名詞1 （樣式） type; style 2 （格式） pattern; form 3 （儀式; 典禮） ceremony; ritual 4 （自然科...
  • 力 : Ⅰ名1 （力量; 能力） power; strength; ability; capacity 2 [物理學] （改變物體運動狀態的作用） forc...
  • 學 : Ⅰ動詞1 （學習） study; learn 2 （模仿） imitate; mimic Ⅱ名詞1 （學問） learning; knowledge 2 （學...
  1. Simulation of penetration test of armoured plate is presented by explicit dynamics algorithm

    摘要採用顯式動力學演算法對裝甲材料侵徹試驗的過程進行數值模擬研究。
  2. And the explicit finite difference method, the combining method of the central difference method and newmark s constant average acceleration method, and the transmitting boundary are used. by comparing the acceleration determined by the several methods of the displacements or velocities, a computing method of acceleration employed the one side difference of velocity is more practicality in this research. corresponding to normal incidence of the body waves, p waves or svwaves, and rayleigh surface waves, two two - dimensional finite difference programs are compiled to compu te the dynamic response of two - phase media

    以土力學模型為基礎，利用以土骨架和孔隙流體的四個位移為基本未知量的數值方法去模擬二維飽水介質中的地震波傳播，採用了顯式差分方法（中心差分法和newmark常平均加速度法結合）和透射邊界，通過比較利用幾種差分格式求解的加速度結果，發現一種用速度單邊差分求解加速度的方法在本文研究中較為實用，分別編制了體波（ p波或sv波） 、 rayleigh面波輸入時求解兩相介質動力響應的兩個二維數值分析程序。
  3. By making some assumptions, collision frequency were presented. then the the flocculation kinetics model was established through population balance equation. comparison of experimental data and modeling results indicate that there are the same trend between the two. so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters. the tem and sem were used to obsever floes in the study of floe structure. the flocculation was divided as flocculi, floc and floe aggregate. the floes structure model was established by assumption that particles position in floe accords with tetrahedron. the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent

    最後，本文還對絮凝動力學和絮體結構進行了研究，在前人研究的基礎上，針對高分子絮凝黃河泥沙，對絮凝過程作了一些符合試驗條件的假設，建立了顆粒碰撞頻率表達式，應用了顆粒數量平衡方程，從而建立了絮凝過程的動力學生長模型，模型計算結果與試驗數據對比表明，二者趨勢一致，在沒有使用經驗參數的情況下基本上能夠描述黃河泥沙絮凝過程中絮體數量和尺寸分佈的變化過程；對絮體結構的研究中，應用掃描電子顯微鏡和透射電子顯微鏡對絮體進行了觀察，將絮體分為絮粒、絮團和絮網三個不同的生長階段，通過假設顆粒結合位置符西安建築科技大學博士學位論文合正四面體，建立了絮體結構模型，計算得到的模型絮體分形維數基本與試驗中的實際絮體相符，在一定程度上能夠反映高分子絮凝黃河泥沙生成的絮體結構。
  4. The main ways of growth is imitating, self - exploring and self - summarizing, through these ways, they accumulate some experience of preschool education, but there is clearly shortcomings in those experience : ( 1 ) educating method is simple, that is to say, the ways of interaction between teacher and children is only language, the objects of interaction is only between teacher and children, the background of interaction is in collective activities, the means of interaction is only in classroom and collective activities directed by teacher. ( 2 ) paying specially attention to teaching knowledge and ignoring play, also paying specially attention to result but not the course of study, all that make kindergarten have the tendency to primary school in teaching style. ( 3 ) the basic educational quality of these teachers is at a low level, e. g

    研究發現：一、貧困民族地區民辦回族幼兒教師在成長中以愛心為基點，充分發揮了奉獻、吃苦耐勞的職業品質，成為她們成長的內在動力；二、被研究教師在實踐中通過模仿、自我探索、自我總結的主要途徑，積累了一定的教育經驗，但也存在明顯的不足； （一）教育方式方法單一，即相互作用的手段僅限於言語傳授；相互作用的對象僅限於教師和幼兒之間；相互作用背景僅限於班級集體活動中；相互作用的途徑僅限於作業課和教師指導的集體活動中； （二）重知識傳遞、輕游戲活動，重教育結果輕活動過程，小學化傾向嚴重； （三）教師基本教育素質偏低，表現在文化知識水平低下，專業技能技巧缺乏，不能滿足幼兒全面發展的需求。
  5. Oscillator mechanism with four - eccentric axes is widely used in modem continuous casting machine. with the increase of operation speeds of the machine, elastic vibrations of the machine parts became much obviously. in order to design the machine reasonably, the complex dynamic property of the system must be studied deeply

    結晶器四偏心式振動機構是大型連鑄機上廣泛採用的一種振動裝置，隨著拉速的提高，其彈性振動效應非常明顯，對其復雜彈性動力學性能進行深入研究是合理設計該系統的基礎。
  6. Presents the system established by taking variable - speed torque converter with adjustable guide blades as a pilot control unit and forming an open or closed loop feedback control system, and its outstanding advantages, such as high capacity, simplicity, reliability and good transmission efficiency owned by hydrodynamic drive, and the dynamic model developed for variable - speed torque converter with adjustable guide blades by means of theoretical analysis and regression analysis of experimental data, and concluds that the model is sophisticated and simple enough to be used as a tool for design, analysis and computer simulation of a hydrodynamic control system

    以導葉可調式液力變矩器作為控制單元組成的開環或閉環液力控制系統，具有液力傳動裝置能容大、系統簡單可靠、傳動效率較高等顯著的優點.通過理論分析和試驗數據的回歸分析方法建立了導葉可調式液力變矩器的數學模型，模型既簡單，又有足夠的工程應用精度，為液力控制系統的設計、動態分析和性能預測提供了必要的理論基礎
  7. The effect of car body elastic vibration on the ride comfort is analyzed. the ride comfort and acceleration responses of the car system with rigid car body model or elastic car body model are studied and compared. finally by using ansys / ls - dyna software, the finite element impact models of car body with a rigid wall have been set up, then the displacement, velocity, acceleration and energy variation of the car body are analyzed and compared for before and after lightening cases under the condition of impact speed 5. 8m / s and 11. 8m / s

    本文利用ansys軟體建立了25k硬臥客車車體輕量化前後的有限元模型，計算了車體的強度、剛度和模態，並對輕量化前後的車體作了對比分析；然後，用nucars動力學分析軟體建立了25k硬臥客車系統的數學模型，分析了彈性振動對平穩性的影響，並對剛性車體和輕量化前後的彈性車體對平穩性和加速度響應的影響作了對比分析；最後用ansys / ls - dyna軟體建立了25k硬臥客車車體輕量化前後的動態顯式有限元模型，分別在5 . 8m / s和11 . 8m / s的速度下碰撞剛性墻，得到了車體的相對位移、速度、加速度和能量的變化過程，並作了對比分析。
  8. By use of the explicit expression involving the main facts, the accurate control and further analysis penetrating into the dynamic essence were developed

    影響接合過程的參數在最佳接合規律中表達為顯式形式，便於精確控制和深入分析各種因素對接合過程影響的動力學機理。
  9. As a step towards such a perspective, pattern formation in generalized cellular automata ( gca ) is studied in this paper, different dynamic behaviors are classified, a definition of edge of chaos is proposed, and experiments are described where self - making patterns emerge which reminiscent of simple living systems. the influence of remembrance to dynamic behavior of gca is also studied

    論文研究了一種離散空間的耦合細胞系統：廣義細胞自動機（ gca ）的模式形成過程，對模式演化的動力學行為進行了分類，給出了一個混沌邊緣定義，模擬實驗顯示了在混沌邊緣區域類似簡單生命系統的自組織模式的突現，同時研究了記憶對gca動力學的影響。
  10. This text completely and systematically studies the status and the development of the pyrolysis and the fluidization of biomass, which distill the bio - oil in the domestic and international area, as well as the existing problems. this thesis primarily include following aspects : ( l ), by experimenting and measuring the energy ( heat value ) and the content of c, h, n chemical element of right 20 kinds of common biomass, on the base of the experimental result, and respectively established the biomass energy predict experiment formula with the element of h and c is from change, and passed the ro. os examination, which provides the basis and convenience for flash pyrolysis fluidization device energy to convert the rate to compute with biomass energy utilization calculation ; ( 2 ), proceeded the tg and dtg experimentation equal velocity ( 10 ? / min, 20 ? / min, 40 ? / min, 60 ? / min ) heating and constant temperature heating by studying on eight kinds of biomass samples, according to the experimental data and arrhenius formula, we established the dynamics model of pyrolysis of, then, using the goast - redfern and p function, we also solved the dynamics parameters and analyze out every kind of biomass ' s frequency factor and parameters of activation energy, and established the every kind of dynamics model of pyrolysis of biomass, all of these provide the theories and basis to make sure the reactor ' s flash pyrolysis work temperature scope design and the describing of pyrolysis reactor dynamics ; ( 3 ), in order to study and ascertain the process of heat completely getting to pyrolysis time of varied size biomass particles, we observed and measured the ratio of length and diameter ( l / d ) with the varied biomass through electron microscope, we concluded the l / d ratios usually is from 5. 0 to 6. 0, the average is 5. 3 ; ( 4 ), we studied the process of biomass transiting and the theory of complete pyrolysis time with the theory of complicated heat field, we got the time ( t ) of the varied size biomass particles arriving to complete pyrolysis, and we knew that the complete pyrolysis time and the time which get to the biggest production ratio are identical, all of these studies provide the theory base for design and forecasting the flash pyrolysis reactor solid state resort time ; ( 5 ), according to the above experiment result, synthesize to make use of the engineering the mechanics, engineering the material, machine the design to learn the principle, deduce, establish the theory of rotation cone flash pyrolysis reactor material resort time ( t ) and reasonable rotation velocity ( or frequency ) relation theory ; and ( 6 ), we gave the reactor ' s smallest cone angle certain, reactor cone wall strength design theory, the reactor production ability theory, the power design method and the critical rotation velocity theory

    本文較全面、系統地綜述了國內外生物質熱解液化制取生物燃油技術研究發展現狀及存在的問題，主要研究內容有： （ 1 ）實驗、測定了20種常見生物質的能量（發熱量）和c 、 h 、 n元素含量，根據實驗結果分別建立了以h和c為自變量的生物質能量預測經驗公式，並通過r _ （ 0 . 05 ）檢驗；為閃速熱解液化裝置能量轉化率計算和生物質能量利用率計算提供了依據和方便； （ 2 ）選擇了8種生物質試樣作了等加熱速率（ 10 min 、 20 min 、 40 min 、 60 min ）和恆溫加熱的tg和dtg實驗，根據實驗數據和阿倫尼烏斯公式建立了生物質熱解反應動力學微分方程，並採用goast - redfem積分法和p函數對其動力學參數進行了求解，解析出各種生物質的頻率因子和活化能參數，進而建立了各種生物質的熱解動力學模型，為科學確定反應器的閃速熱解工作溫度范圍及熱解反應動力學描述，提供了理論和依據； （ 3 ）為研究和確定不同尺度的生物質顆粒中心達到全熱解的時間，在體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了實驗觀察和測定，得出生物質的長徑比（ l d ）一般在5 . 0 6 . 0之間，平均為5 . 3的結果； （ 4 ）採用復雜溫度場傳熱學理論對生物質傳熱過程及充分熱解時間理論進行了研究，解析推導出了不同尺寸生物質顆粒中心溫度達到充分熱解溫度的時間（ t ） ，得出了理論推導的充分熱解時間與最大產油率的熱解時間相一致的結果，為閃速熱解反應器固相滯留時間設計和預測提供了理論依據； （ 5 ）根據上述實驗結果，綜合運用工程力學、工程材料、機械設計學原理，推導、建立了轉錐式閃速熱解反應器物料滯留時間（ ）與轉速（或頻率）合理匹配理論； （ 6 ）提出了轉錐式閃速熱解反應器的最小錐角設計、錐壁強度設計、生產能力設計理論和功率計算方法及臨界轉速理論等。
  11. The equation of motion is described and dynamic and static respiratory mechanics are analysed to highlight all those data that can influence decision - making in setting mechanical or assisted entilation in inasiely and non - inasiely entilated patients

    在有創性和無創性通氣病人中設置機械或輔助通氣， （我們要）描述運動方程式，分析動靜態呼吸的力學機制，以凸顯這些能影響決策的數據。
  12. A new step - by - step integral procedure of dynamics equations is presented. the general expression of the solution of dynamics equations is obtained on the basis of the homogenous analytical solutions of dynamics equations and duhamel integration. the explicit analytical integration algorithm, which is characterized by fourth - order accuracy, self - starting and self - correcting, is employed to discretize the equivalent load terms

    另外提出了求解動力學方程的一個新型的逐步積分法，基於線性動力學方程的解析齊次解及duhamel積分，構造出適用於非線性動力學方程解的一般積分表達式，對包含非線性項的非齊次項採用插值近似的方法，得到一個單步顯式、自起步、預測校正具有四階精度的解析逐步積分演算法。
  13. The properties of cn thin films such as their morphology, component, crystal structure and the bonding structure and the relation between those properties and the gas - phase reaction parameters were discussed, showing that the deposition of p - c3n4 thin film is the compete result of various reaction processes in the dynamics balance conditions ; the process of cn films depo sition is diagnosed in situ through the optical emission spectra technique, the effects of experimental parameters on the concentration of the precursors and the gas - phase reactions in the plasma have been obtained ; the main reaction precursors for film deposition identified ; the relation between the characteristics of cn thin films and the reaction process in the plasma is analyzed. the cn thin films deposition under different substrate temperatures in high pressure pe - pld shows that the si atom of the substrate has participated the cn films growth process, based on this the growth mode of cn thin films on the si substrate is proposed. the further experiment of cn thin films deposition on si substrate scratched by diamond as well as covered with fe catalyzer has been attempted, which indicates that changing the dynamics conditions of the surface reaction can alter the growth characteristic of the cn thin films and can enhance obviously the films growth rate

    採用pld技術進行了碳氮化合物薄膜沉積，得到了含氮量為21at的cn薄膜；研究了襯底溫度和反應氣體壓強對薄膜結構特性的影響，給出了cn薄膜中n含量較小、 sp ~ 3鍵合結構成分較少和薄膜中僅含有局域cn晶體的原因；引入脈沖輝光放電等離子體增強pld的氣相反應，給出了提高薄膜晶態sp ~ 3鍵合結構成分和薄膜的含n量可行性途徑；應用pe - cvd技術以ch _ 4 + n _ 2為反應氣體並引入輔助氣體h _ 2 ，得到了含n量為56at的晶態cn薄膜；探討了cn薄膜形貌、成分、晶體結構、價鍵狀態等特性及其與氣體壓強和放電電流的關系，證明了- c _ 3n _ 4薄膜沉積為滿足動力學平衡條件的各種反應過程的競爭結果；採用光學發射譜技術對cn薄膜生長過程進行了實時診斷，得到了實驗參量對等離子體中活性粒子相對濃度和氣相反應過程的影響規律，給出了cn薄膜沉積的主要反應前驅物，揭示了cn薄膜特性和等離子體內反應過程之間的聯系；採用高氣壓pe - pld技術研究了不同襯底溫度條件下cn化合物薄膜的結構特性，揭示了si原子對薄膜生長過程的影響，給出了si基表面碳氮薄膜的生長模式；在金剛石研磨和催化劑fe處理的si襯底上進行cn薄膜沉積，證明了通過控制材料表面動力學條件可以改變碳氮薄膜結構特性，並可顯著提高晶態碳氮材料的生長速率。
  14. In addition, the dynamic equation of the rotor with trailing edges and the 2 - x actuator has been modeled for analyzing the aerodynamic performance of the rotor. the result of the analysis tells us that the performance of the rotor with trailing edges can get a remarkable improvement

    進而研究旋翼動力學模型，將推挽式雙x驅動器模型作為后緣附翼的一種驅動機構，分析旋翼的氣動性能，模擬運算結果表明，后緣附翼智能槳葉在各方面的性能都有顯著的提高。
  15. In this paper, maccormack explicit time - split scheme, baldwin - lomax algebraic turbulent model and two - steps hydrogen - air nonequilibrium chemical kinetics model are employed to simulate the 2 - d flow fields in a fixed geometry scramjet combustor in different injecting way of fuel in different flight conditions. the results show, in the same entrance condition, the operating mode of scramjet combustor is influenced by the control of fuel

    本文採用maccormack顯式時間分裂法、 b - l代數渦粘性湍流模型及氫-空氣兩步非平衡化學動力學反應模型，模擬了在不同的飛行馬赫數條件下，固定幾何的雙模態燃燒室在不同供油規律下的二維燃燒流場。
  16. This paper focuses on launch dynamics of a self - propelled gun coupled with its automatic ramming system, based on the rigid multi - bodies theory. the main contents are included as follows : the first, three - dimensional models of the whole gun and it ' s ramming system are constructed by use of the software platforms of i - deas and adams ( automatic dynamic analysis of mechanical system ). the second, the dynamic equations are obtained according to the lagrange equations of the first kind expressed by euler angles

    本文運用多剛體動力學理論，對某炮自動供輸彈系統和全炮耦合運動的發射動力學問題進行了探索研究，主要包括以下幾個方面：基於i - deas平臺和動力學分析軟體adams （ automaticdynamicanalysisofmechanicalsystem ）建立了某自行火炮的全炮及其供輸彈系統的三維實體模型；推導了第一類lagrange形式的多體動力學方程的顯式表達式，建立了相對慣性系運動的全炮動力學模型、供彈系統動力學模型以及供輸彈系統與全炮耦合運動的動力學模型。
  17. Abstract : in this paper chaos theory is used to study the predict ion methods of crack in concrete gravity dams. the equations of dynamics for crac k evolution are founded. with the reconstruction in phase space, the formulas of r elative dimension d2, representing the dynamic characteristics of crack, are obta ined

    文摘:在探討用混沌與分形理論研究混凝土大壩裂縫演變機理的基礎上，建立了裂縫演變的動力學方程組，通過相空間重構，得出顯示裂縫動態特性的關聯維數d2的表達式
  18. By means of an integral expression of non - linear dynamics equation an explicit precise integration algorithm with four order accuracy and self - correct and self - starting to solve this equation is given. this method is adapted to solve the non - conservative system with multi - dof and strong nonlinear. the non - linear dynamic equations are divided into some blocks or groups

    給出了求解非線性動力學方程的精細積分表達式，利用插值近似該方程的非線性項，得到一個具有四階精度並且是單步顯式、自起步、預測-校正的lagrange （或hermite ）插值精細積分演算法，適于強非線性、非保守系統。
  19. The dynamics problem of the robot is analyzed and the explicit solution of dynamics equation is given by lagrange method that established the foundation of dynamics optimization. the dynamics equation is established by newton - euler formula, and the joints ’ moment is worked out and simulated with matlab. finally, by considering principal axis, a 7 - dof tow placement robot is formed

    對鋪絲機械手的動力學問題進行了分析，採用拉格朗日方法推導出具有顯式結構的動力學方程，為后續的動力學優化打下了基礎;通過牛頓-歐拉遞推公式建立起封閉形式的動力學方程，計算出各個關節所需的驅動力矩，並用matlab程序進行了模擬。
  20. 10 bajaj c l, lee h y, merkert r, pascucci v. nurbs based b - rep models for macromolecules and their properties

    為研究溶劑對復雜大分子的影響，在分子動力學模擬或monte carlo模擬中主要採用顯式溶劑模型。
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