結晶速率特性 的英文怎麼說

中文拼音 [jiējīngsùlǜtèxìng]
結晶速率特性 英文
crystallization rate characteristic
  • 結 : 結動詞（長出果實或種子） bear （fruit）; form （seed）
  • 晶 : Ⅰ形容詞（光亮） brilliant; glittering Ⅱ名詞1. （水晶） quartz; （rock） crystal 2. （晶體） any crystalline substance
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 特 : Ⅰ形容詞（特殊; 超出一般） particular; special; exceptional; unusual Ⅱ副詞1 （特別） especially; v...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 結晶 : 1 （析出晶體） crystallize2 （晶體） crystal 3 （成果） crystallization; fruit; product; quintess...
  • 速率 : speed; rate; tempo
  • 特性 : characteristic（s）; character; performance; features; properties; behaviour; response; character...
  1. The crystallization and melting behavior of mellocene - catalized branched and linear polyethylenes of low molecular weight was studied. it was found that the crystalline lattice of branched polyethylene is larger than that of linear polyethylene because of the existence of branched chains. the melting behavior of branched polyethylene is similar to that of linear polyethylene since the branched chains can not enter the lattice. however, the crystalline behavior of low molecular weight branched polyethylene is the same as that of high molecular weight linear polyethylene, but different with that of low molecular weigh linear polyethylene. kinetics theory analysis evidenced that the transition temperature of growth regime of the branched polyethylene is about 20 lower than that of linear polyethylene with the same molecular weight. it may be attributed to the existence of short branched chains

    研究了金屬茂催化的低分子量支化聚乙烯和線性聚乙烯的結晶及熔融行為，發現支化聚乙烯的結構與線性聚乙烯相同為正交結構，但晶格略有膨脹.支鏈的存在對熔融行為影響不大，兩種聚乙烯的熔點均隨結晶溫度的升高而非線性增加，表現出低分子量樣品的共同特徵.但支鏈的存在對結晶行為卻有很大的影響，主要是由於支鏈的存在降低了晶體的結晶速率從而影響結晶過程，使得低分子量的支化聚乙烯的結晶行為與高分子量線性聚乙烯的結晶行為相似而與低分子量的線性聚乙烯不同.動力學分析表明，低分子量的支化聚乙烯的結晶生長方式的轉變溫度比同等分子量的線性聚乙烯降低了約20
  2. According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

    本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。
  3. The variable polarity power supply circuit uses two stages full - bridge inverter, the former inverter is regarded as a constant - current source with fast dynamic response, and supplys energy for the second one, and the latter one is to produce variable polarity current excellently, and low - frequency pulse current by variable polarity power supply is used to reduce input energy and control the shape of weld bead while welding. a series of high - frequency pulse current is superposed on direct - current - electrode - negative ( dcen ) current through the high - frequency pulse power supply, which is used to compress the arc and improve process of crystallization

    其中變極性電源採用二次全橋逆變結構，一次逆變提供快速的響應速率並給二次逆變提供能量，二次逆變提供良好的變極性性能，使輸出能量最優化，並用其低頻電流特性減小電弧線能量，控制焊縫成形;高頻脈沖電源提供的高頻電流疊加在反極性電流dcen上，利用電流的高頻特性壓縮電弧，改善焊縫金屬結晶過程。
  4. 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。
  5. The analyses given in this paper to quasi - three - level for 946 nm laser are complete. the relation between 946 nm laser transmission and optimal crystal length has been derived from the rate equations describing the population inversion and the photon density in the laser cavity in the steady - state case. the minimal claims to coating have been given on the base of contrasting 946 nm transmission with 1064 nm transmission in the condition of different cavity losses and how the pump beam radius in the laser crystal and optimal crystal length affect the laser threshold and output power of 946 nm laser has been given as well

    對產生946nm譜線的準三能級結構給出了較為完整的分析，利用激光諧振腔處于穩態時的速率方程，導出了準三能級nd ： yag946nm起振時，透射損耗與最佳激光晶體長度的關系，在與1064nm透射損耗相比較的基礎上，給出了不同的腔損耗情況下的最低鍍膜要求，並且給出了激光閾值、輸出功率和最佳激光晶體長度及泵光光斑大小的關系，這為設計室溫下高效運轉的946nm激光器的提供了理論基礎，這種分析方法對研究此類低增益，準三能級或三能級激光系統輸出特性有借鑒意義。
  6. Under the careful retrospection and analysis on the previous and recent experiments about mechanical behavior of nanocrystalline metals performed by almost main investigators, the dislocation and atomic diffusion is believed to contribute hardly to the deformation of nanocrystalline alloy, and a model based on thermal activation process was applied to fit the experimental data of nanocrystalline ag

    結果表明，納米晶金屬ag的不僅具有比粗晶ag高2 - 6倍的拉伸和壓縮強度，而且在大范性形變階段顯示了極低的加工硬化和應變速率敏感性。結合位錯理路和非晶合金形變特徵，提出納米晶金屬ag的塑性變形主要由於晶界滑移貢獻。
  7. From an examination of the tensile behavior of cz ly12 alloys under different temperature and strain rate, two kinds of deformation and intergranular fracture behaviors were observed that were opposite to the characteristic strain rate range in fine - grained superplasticity. the mechanisms are described as follows. the high ductility achieved at high strain rate is generally attributed to the dominant role of gbs accommodating mechanisms, which is considered as dislocation creep within grains controlled by subgrains

    研究選用自然時效淬火態的ly12鋁合金，進行了一系列不同溫度和應變速率下的單軸拉伸試驗， 480下，觀察到與傳統細晶超塑性特徵區間相反的行為：較高應變速率下，動態再結晶使晶粒細化，促進了晶界滑移，亞晶界控制的晶內位錯蠕變是晶界滑移的主要協調機制。
  8. In this thesis, we used the q - switched nd : yag laser pulse focused by lens to pump the cr ~ ( 4 + ) : mg _ 2sio _ 4 crystal, with the pump laser pulse duration and energy of 30ns and 50 mj separately, and got the laser pulse with center wavelength, pulse duration and energy of 1. 22 m, 8. 2 ns and 10 mj on the best work condition. on the base of zhangguowei s approximation about gain - switching and the parameter of cr ~ ( 4 + ) : mg _ 2sio _ 4 crystal, we calculated the time characteristics of cr ~ ( 4 + ) : mg _ 2sio _ 4 laser pulse with rate equation by numerical method, obtained the conclusion that the laser pulse duration is only related to the pump energy and cavity length : the larger the pump energy is, the narrower the pulse duration is ; the longer the cavity is, the wider the

    本論文採用調qnd : yag脈沖激光通過透鏡聚焦后縱向抽運cr ~ （ 4 + ） : mg _ 2sio _ 4晶體，抽運光脈沖寬度為30ns 、能量為50mj ，在較佳工作條件下得到了中心波長為1 . 22 m 、脈寬為8 . 2ns 、能量為10mj的激光脈沖;並在張國威分析增益開關時間特性的近似法基礎上，結合實際的cr ~ （ 4 + ） : mg _ 2sio _ 4激光器的相關參數，從速率方程出發，用數值計算的方法更為精確的模擬了cr ~ （ 4 + ） : mg _ 2sio _ 4激光器輸出激光脈沖的時間特性，得出了激光脈寬只與抽運能量、腔長有關的結論，即抽運能量愈大，脈寬越窄;腔長越長，脈寬則愈寬。
  9. In chapter three, all kinds of projects which may be used in current or future surveillant system, especially soc ^ sopc and multimedia processor, are analyzed and compared in detail. with the gradual maturation of hard - disk recording and the enhancement of pci bus, a corresponding plan of multi - channel surveillant system, which considers the feasibility of current technology and product cost, are put forth

    第三章就當前及將來可能用於監控系統的各種軟硬體實施方案作了深入的比較和分析，特別是soc和sopc思想以及當前流行的多媒體晶元結構對於今后系統設計的影響；同時考慮到近年來硬盤錄像技術的成熟以及pci總線速率的提高，就當前的技術可行性以及實際產品成本提出了一套多路監控系統的實施方案。
  10. The thesis is composed of 9 parts : the background, significance, main topics and innovations in the thesis are introduced in chapter 1 ; in chapter 2, the main function and performance of interface circuits are described from the view of system by using the example of gigabit ethernet ' s transceiver ; the transmission media ' s frequency characteristics and model are analyzed for the high - speed data transmission system in chapter 3 ; the line driver is presented in chapter 4 ; the equalization principles for high - speed data transmission system are introduced in chapter 5 ; a novel adaptive equalizer for 1000base - cx transceiver is presented in chapter 6 ; in chapter 7, a fixed equalizer for 2. 5gbps transceiver is described ; in chapter 8, layout design and measured results are discussed ; at last, the conclusions are drawn in chapter 9. during period of finishing the thesis, i read lots of literatures about the interface circuits in high - speed data transmission system, studied their principles and design techniques, and designed : 1 、 the line driver for 2. 5gbps baseband copper cable transceiver ; 2 、 the fixed equalizer for 2. 5gbps baseband copper cable transceiver ; 3 、 the fixed equalizer for 1. 5gbps sata ( serial at attachment ) transceiver ; 4 、 an adaptive equalizer for 1000base - cx transceiver

    論文由9部分組成：在第一章引言中介紹了論文的背景、意義、國內外研究現狀，以及論文的主要內容和創新；第二章以千兆位以太網為例，從系統的角度介紹了高速數據傳輸系統介面電路的主要功能和性能指標；第三章分析了高速數據傳輸系統的傳輸介質的頻率特性和模型；第四章描述了線驅動器的設計原理及其電路實現；第五章描述了高速數據傳輸系統的均衡原理；第六章描述了適用於1 . 25gbps基帶銅纜收發器系統的自適應均衡器的設計原理和電路實現；第七章描述了適用於2 . 5gbps基帶銅纜收發器系統和1 . 5gbps串列硬盤介面（ sata ）收發器系統的固定均衡器的設計原理及其電路實現；在第八章中分析了電路的版圖設計及晶元測試結果；最後，第九章總結了全文。在完成論文期間，查閱了大量的有關高速數據傳輸系統介面電路方面的文獻，較系統地學習了線驅動器、傳輸線和均衡器等方面的理論知識和電路設計原理，設計了用於： （ 1 ） 2 . 5gbps基帶銅纜收發器系統的線驅動器； （ 2 ） 2 . 5gbps基帶銅纜收發器系統的固定均衡器； （ 3 ） 1 . 5gbpssata系統的固定均衡器； （ 4 ） 1 . 25gbps基帶銅纜收發器系統的自適應均衡器。
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