數均聚合度 的英文怎麼說

中文拼音 [shǔjūnjùgědù]
數均聚合度 英文
number-average dp
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 均 : Ⅰ形容詞（均勻） equal; even Ⅱ副詞（都; 全） without exception; all
  • 聚 : 動詞（聚集; 聚積） assemble; gather; get together
  • 合 : 合量詞（容量單位） ge, a unit of dry measure for grain （=1 decilitre）
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 聚合 : 1 （聚集到一起） get together2 [化學] （單體結合成高分子化合物） polymerization; polymerize 3 [生...
  1. The thermodynamic free energy on mixing and the spinodal equation in ternary homopolymer blends were obtained by making plausible approximation based on flory ' s equation of state theory. because of the non - linear behavior of the spinodal equation, a numerical solution approach was used and succeeded in solving the problem. spinodal of polystyrene ( ps ) / poly ( vinyl methyl ether ) ( pvme ) / poly ( 2, 6 - dimethyl - 1, 4 - phenylene oxide ) ( ppe ) were simulated over a wide temperature range and the calculated result was coincidence with that of the literature

    將上述方法用於已知狀態方程參數的二元均聚共混體系聚苯乙烯（ ps ） /聚甲基乙烯基醚（ pvme ） ，三元均聚共混體系聚苯乙烯（ ps ） /聚甲基乙烯基醚（ pvme ） /聚2 ， 6 -二甲基1 ， 4 -苯撐氧（ ppe ） ，得到一系列不同溫度下的spinodal相圖，預測結果與文獻報道吻合，在此基礎上進一步研究了聚合物的分子量對體系相行為的影響。
  2. Combining with fragstats software, landscape diversity index ( h ), landscape dominance index ( d ), landscape evenness index ( e ), fractal dimension, landscape contagion index and landscape fragmentation index are calculated. they show : ? grassplot landscape is a primary landscape type in gansu. the numbers of big patch is much more

    以甘肅省為例，基於景觀生態學基礎上，利用arcview和arc / info地理信息系統軟體對甘肅省景觀系統進行分類，結合景觀指標計算軟體fragstats計算出了甘肅省景觀多樣性指數（ h ） 、優勢度指數（ d ） 、均勻度指數（ e ） 、斑塊分維數、聚集度指數以及斑塊的破碎度指數。
  3. Firstly, the surface characteristic of polystyrene particle is changed from water detesting to water intimity by using special techniques and admixtures so mat the compound quality with inorganic materials is insured. secondly, the contradiction between the weight and strength is solved through optimizing the particle size and using composite fiber and the best heat conductivity is achieved under the condition that the necessary strength is met. in the research process, the author solved the problem of fiber dispersing in insulating materials so that the contraction of the material is controlled

    課題研究中，首先採用特殊的改性工藝及外加劑實現對聚苯乙烯顆粒表面的成功改性，使其表面由憎水轉化為完全親水，確保與無機材料的復合質量；其次，通過採用優化骨料級配及使用復合纖維等措施解決了保溫材料的輕質與強度的矛盾，使保溫材料在滿足必要的強度的前提下，導熱系數降至最小；並且，課題研究中成功解決了纖維在保溫材料中均勻分散的問題，達到了抑制保溫材料收縮的目的；最後，通過採用復合外加劑、合適的膠凝材料及合理的配比等措施確保該保溫材料具有良好的和易性，滿足施工的要求。
  4. It has been shown that whether resonant or non - resonant interaction system, the kerr effect weakens the coupling of the field - atom, shortens the cycle of quantum collapses and revivals of the atomic level occupation and makes the nonclassical correlation properties steady. kerr effects on the properties of the correlation, on the correlation intensity between the two - mode, on the photon - number distribution and on the bunching or antibunching effect of the two - mode su ( 1, 1 ) coherent states produce obviously different characters when it is changed the initial intensity of the light field. that is to say, kerr effect on the two interaction systems is accorded

    數值計算結果表明：無論是共振還是非共振相互作用， kerr效應均使原子與光場的耦合減弱，原子布居的崩塌與復甦的周期縮短，光場的非經典相關的穩定性增強；在初始光場較弱和較強兩種情況下，類kerr介質對雙模su （ 1 ， 1 ）相干態場兩模間的相關性、相關程度以及光子的聚束與反聚束效應產生的作用均有明顯的區別，即kerr效應對系統在共振及非共振作用時的影響是一致的。
  5. It has been shown that : the little indentation which represents the quantum noise of the system appears in the evolution curves ; the quantum noise which is caused by virtual photon field gradually becomes weak when w increases, the quantum noise increases when n increases ; the virtual photon process make the antibunching effect strengthen, make the squeezing degree deepen obviously, and lead to the additional vibration of entropy, the oscillation extent of the additional vibration of entropy increases when n increases and decreases when co or g increase. besides, the quantum dynamics of two coupling atoms interacting with a single mode ligh t field in a kerr medium is studied in this paper ; the influences of the kerr effect on the mean photon number, the degree of second order coherence of field, the evolution of the field entropy and the squeezing effect are also discussed

    ）的增大，量子噪聲分別減小和增大；虛光子過程使光場的反聚束效應增強，使光場的壓縮程度明顯加深，並引起了附加的「熵振蕩」 ，這種附加「熵振蕩」的幅度將隨著光場初始平均光子數（ ? ）的增加而增大，隨著光場頻率和原子間耦合系數g的增大而減小。本文還研究了充滿kerr介質腔中「耦合雙原子-單模光場」相互作用系統的量子動力學性質，研究了克爾效應對場的平均光子數、二階相干度、場熵演化特性及光場壓縮效應的影響。
  6. The results indicated that the dimension, shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c, but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased, melting temperature and decomposition temperature decreased, in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o, c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests. the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big. this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60, 30 : 30 - 40 and 60 : 15 - 30 respectively, the friction coefficient was relatively small. the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time, the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle, lubricant transfer film could be formed on metal surface, thus direct contact between the surface of metal friction pair rings was reduced. their working life was elongated extremely ; there was mainly much graphite, a little ptff, moo3, feso4, cus and so on in lubricant transfer film

    試驗結果表明：所選原料的尺寸、形狀及純度可滿足固體潤滑劑的性能要求；聚四氟乙烯樹脂熱分解溫度超過400 ，但在ptfe中加入無機填料會使復合材料吸水率提高，熔融溫度及分解溫度降低，且伴有氧化分解反應；碳纖維表面含有c = o及c - o - c等極性基團，有利於提高其與其它組分的相容性，提高層間剪切強度；均勻設計試驗方法能夠用較少的試驗次數找出配方與摩擦性能間的關系，擬合曲線基本能表示各配方的摩擦系數發展趨勢；配方中不加銅粉或不加石墨，其摩擦系數均較高，說明銅粉和石墨應該配合使用；當銅粉15份、石墨60份時，銅粉30份、石墨30 - 40份時，銅粉60 、石墨15 - 30份時，摩擦系數均具有較低值；純聚四氟乙烯樹脂在空氣冷卻時結晶度最大，磨損量也是三者中最大的；同時，固體潤滑劑試樣在空氣冷卻時的磨損量也是三者中最大的：不論是固體潤滑劑與45 #鋼軸配副或是固體潤滑劑鑲嵌入銅套后與gcr15鋼軸配副，在金屬表面均可形成潤滑轉移膜，從而減少金屬摩擦副表面間的直接接觸，大大延長其使用壽命;轉移膜中主要含有較多的石墨、少量聚四氟乙烯、 moo 。
  7. In this text, we first do some research on the genetic algorithm about clustering, discuss about the way of coding and the construction of fitness function, analyze the influence that different genetic manipulation do to the effect of cluster algorithm. then analyze and research on the way that select the initial value in the k - means algorithm, we propose a mix clustering algorithm to improve the k - means algorithm by using genetic algorithm. first we use k - learning genetic algorithm to identify the number of the clusters, then use the clustering result of the genetic clustering algorithm as the initial cluster center of k - means clustering. these two steps are finished based on small database which equably sampling from the whole database, now we have known the number of the clusters and initial cluster center, finally we use k - means algorithm to finish the clustering on the whole database. because genetic algorithm search for the best solution by simulating the process of evolution, the most distinct trait of the algorithm is connotative parallelism and the ability to take advantage of the global information, so the algorithm take on strong steadiness, avoid getting into the local

    本文首先對聚類分析的遺傳演算法進行了研究，討論了聚類問題的編碼方式和適應度函數的構造方案與計算方法，分析了不同遺傳操作對聚類演算法的性能和聚類效果的影響意義。然後對k - means演算法中初值的選取方法進行了分析和研究，提出了一種基於遺傳演算法的k - means聚類改進（混合聚類演算法） ，在基於均勻采樣的小樣本集上用k值學習遺傳演算法確定聚類數k ，用遺傳聚類演算法的聚類結果作為k - means聚類的初始聚類中心，最後在已知初始聚類數和初始聚類中心的情況下用k - means演算法對完整數據集進行聚類。由於遺傳演算法是一種通過模擬自然進化過程搜索最優解的方法，其顯著特點是隱含并行性和對全局信息的有效利用的能力，所以新的改進演算法具有較強的穩健性，可避免陷入局部最優，大大提高聚類效果。
  8. 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 。
  9. The investigated results express that configurational entropy will increase with increasing temperature and is determined by the heat capacity difference, which is restricted within the constant value and a value inverse with temperature

    研究結論表明：聚合物的構型熵隨溫度的上升均增大，並由同一物質非晶態的熱容量與晶態的熱容量之差決定，其變化限制在熱容量差為恆定及與溫度成倒數的范圍之內。
  10. The paper puts forward the clustering algorithm includes : clustering based on grid and iterative, enhanced clustering algorithm base on density and k - medoids, enhanced k - means algorithm ( optimize chooseing consult _ points in iterative process ), enhanced clustering algorithm base on distance. they can overcome many limitations ( some traditional algorithms terminate in local optimization. many results of cluster are roundness, too many times in partition iterative process ), which are related to the static architecture of traditional model

    在傳統聚類演算法的基礎上，結合我們科學數據挖掘的應用對象?分子動力學數據，提出了迭代網格聚類演算法， k -平均和基於密度結合的聚類演算法，迭代過程中優化選擇中心點的k -平均方法，以及改進型的基於距離的聚類演算法等模式識別方法，能夠解決傳統演算法帶來的諸多問題（比如一些傳統的聚類演算法常常收斂于局部最優，發現都模式都趨近於球形，劃分方法中迭代次數過多帶來的效率問題） 。
  11. A monte carlo model was developed for simulating the adsorption behaviors of linear macromolecule chains on the solid - liquid interface. the simulations were performed on a simple cubic lattice, which was 50 50 50 sites in size. the concentration profiles of total segments, tails and loops in dilute solutions were used to analyze the influences of simulation parameters ( body concentration, interaction energy between segments, adsorption energy of interface, and macromolecule chain length ) on various adsorption configurations

    本文採用montecarlo方法構造了水溶性均聚鏈狀高分子固液界面吸附模型，在50 50 50簡單立方格子上模擬研究了高分子稀溶液中鏈節濃度、鏈尾和鏈環分佈，並結合真實高分子鏈的吸附行為，討論了模擬參數（鏈節間相互作用能、界面吸附能、體相濃度與鏈長）對各種吸附構型分佈、吸附量、表面覆蓋度和附著分數的影響。
  12. Lactide were investigated. the key factors affecting the polymer intrinsic viscosity were found to be monomer recrystallization times, stannous octoate concentration and polymerization time. the thermal stabilizing agent did not significantly affect the polymer molecular weight. the polymer with a viscosity average molecular weight beyond 200000 was fairly reproducible by optimizing the polymerization conditions. it was found that poly

    單體重結晶次數辛酸亞錫濃度聚合時間等條件均是影響聚合物特性粘數的重要因素。熱穩定劑對聚丙交酯的分子量幾乎沒有影響。優化聚合條件可以獲得粘均分子量大於200000的聚丙交酯材料，聚合結果具有良好的重復性。
  13. The content of styrene was found to be dependent on the investigated grafting conditions, of which the dose rate and monomer concentration were the major conditions, and the dependence of the initial rate of grafting on the dose rate and the monomer concentration was found to be of 0. 4286 and 1. 1662 orders, respectively. the results indicate that the grafting reaction is competitive and the copolymerization and the graft - copolymerization are existing at the same time. the grafting proceeds by the so - called front mechanism in which the grafting starts at the surface of the films and moves toward the middle of the film by successive diffusion of the styrene through the grafted layers

    我們對輻射接枝反應中的各個因素如：單體濃度、輻射劑量率、輻射劑量以及反應時間進行了研究分析，結果表明：單體濃度和劑量率是反應的兩個主要影響因素，它們對反應速率的影響指數分別為1 . 1662和0 . 4269 ；反應的動力學方程為： rg k [ d ] ~ （ 0 . 4269 ） [ m ] ~ （ 1 . 1662 ） ；認為接枝反應是一競爭反應，單體的均聚反應和在聚合物上的接枝反應同時存在，單體濃度的高低決定著競爭反應的方向；輻射接枝反應是從聚合物表面開始的，隨著溶劑的溶脹和單體的擴散最後在整個膜體中形成接枝產物。
  14. Aim : to analyze the mechanism, thermadynamic theoretical basis, dynamic mechanism and influencing factors of thermally induced phase separation ( tips ) in order to completely grasp the factors affecting the size, distribution and form of pores, so that the adjusted range of pore can be widened and the preparation of porous membrane can be repeated and controlled. methods : considering from the structural characteristics of tissue engineered materials, the methods of preparing porous membrane using tips technique, the hermadynamic theoretical basis, dynamic mechanism and influencing factors were analyzed, the problems and investigative directions in the future were also analyzed. tips technique is a process of phase separation of polymer homogenous solution under quenching, and it is suitable for diameter and structural form of the micropore materials prepared using tips are closely correlated with the kind and dispensing proportion of polymer attrnuant, polymer concentration and polymer molecular mass, etc. conducted, including determination of polymer - solvent system phase diagram, study of form and appearance of porous membrane of different thickness, study of form and appearance of porous membrane prepared with systems of different x, which is the parameter of polymer - solvent interaction

    目的:分析熱致相分離成膜過程的機理、熱力學理論基礎、動力學機制以及影響因素，以便充分掌握影響孔度大小、分佈、形態的因素，使孔度調控范圍得以拓寬，使多孔膜的制備能重復可控.方法:從組織工程材料結構特點出發，分析熱致相分離聚合物多孔膜的制備方法及該法成膜的熱力學理論基礎、動力學機制以及影響因素.並分析實驗中存在的問題及今後的研究方向.結果:以熱致相分離法可制備聚合物多孔膜.熱致相分離法制備多孔膜是高聚物均相溶液在淬冷條件下發生相分離的過程，它適用於上臨界共溶溫度型聚合物一稀釋劑二元體系.熱致相分離法成膜的過程，可以認為是旋節線機理佔主導地位.熱致相分離法制備的微孔材料，其孔隙率、孔徑大小、結構形態與聚合物稀釋劑的種類、組成配比、聚合物濃度、聚合物分子量等因素密切相關.結論:可採用熱致相分離技術制備多孔膜，通過改變不同的成膜條件可獲得一系列不同孔徑尺寸和孔徑分佈的多孔膜材料.對熱致相分離成膜過程中聚合物-溶劑體系的相圖測定，不同厚度的多孔膜形貌研究，不同x （聚合物-溶劑相互作用參數）體系所制備的多孔膜形貌等需深人研究
  15. We studied its distribution pattem by using the following measures f the test for fitting to the poisson, negative binomial and neyman a distribution. at the same time, we use negative binomial parametef, dispersal index, patchiness index, cassie s index and clumping index, estimated the aggregation intensity. the results showed that the distribution pattern is typically aggregated, and the intensity of aggregation vari

    經統計分析，青島百合復合種群、各局部種群內個體的分佈格局離散分佈擬合的結果符合負二項分佈；各聚集強度參數中，叢生指標）和cassie指標（二k ）均大於o ，負h項參數限）均較小，擴散系數k卜擴散型指數）和聚塊性指標（ m m ）均大於1 ，以上這些表明各個局部種群的分佈格局都為聚集分佈。
  16. ( 5 ) the article also investigate the recrystallization condition of crude lactide and point out that it also an important factor have influence on the purification production ratio. ( 6 ) give the kinetics equation of depolymerization reaction. by determination the degree of polymerization ( dp ) of the reaction system, we can get the kinetics data of the reaction

    本文建議使用乙酸乙酯和異丙醇混合溶劑（ 6 ： 4 ）對丙交酯粗產物進行重結晶； （ 6 ）提出解聚反應的動力學方程，認為它是一個可近似處理為一級反應的連續反應，並可通過測定體系的平均聚合度的方法來得到包括活化能在內的反應動力學數據。
  17. The higher landscape heterogeneity, the closer to nature secondary forest. along the gradient, landscape congregation index exhibits descendent tendency, showing a significant relationship between the extent of patch mosaic and the extent of disturbance, according to changes of landscape mean shape index ( lmsi ) and landscape mean fractal dimension index, integrated disturbance ( nature disturbance, human activities, vegetational inner succession or population dynamics ) tend to enhance

    景觀聚集度指數是隨著梯度區呈下降的變化趨勢，表明斑塊之間的鑲嵌聯系的程度與受到的干擾程度有極為重要的關系。從景觀平均形狀指數和景觀平均分維數的變化，可看出綜合干擾（自然干擾、人為活動、植被的內源演替或種群的動態變化）是呈增強的發展趨勢。
  18. Based on the polymerization reaction mechanism of pet, the model includes all main reactions and major side reactions with measured operational variables as its input and polymerization degree ( dp ), average molecular weight and parameters of molecular weight distribution as its output

    模型從聚合反應機理出發，考慮了所有的主反應和主要的副反應，以實測的工藝操作參數為輸入，以各反應釜、特別是終端產品的聚合度、平均相對分子質量及相對分子質量分佈參數為輸出。
  19. The results showed that the forming constant and the fluorescence relative intensity were increased with the increase of cross - linked degree, and also, a well straight line of i vs. cross - linked degree was obtained ( where i = i - i0, i is the fluorescence relative intensity of guest in the presence of different - cyclodextrin polymer and i0 is that of guest in aqueous solution ). the electrorheological properties of suspensions of these particles in silicon oil have been investigated under dc electric field, which exhibited a significant er behavior

    結果表明，超分子配合物中主-客體配比均為1 ： 1 ，其生成常數和相對熒光強度均隨交聯度的增長呈上升趨勢，且相對熒光強度的增量與對應的交聯度存在良好的線性關系。電流變液性能測試發現， 6種超分子配合物電流變液在3kv mm直流電場作用下，其屈服應力達3 . 38 5 . 98kpa ，與對應聚合物相比，平均增加了47 . 6 。
  20. The simulation results show that the effect of mgo algorithm is great. comparing mgo algorithms with other related algorithms, such as bt, fef, fcef and la, there exist some extent of performance improvement in broadcast, scatter, gather and all - gather operation. further, the performance improvement ratio is increased as more computers ad

    Mgo演算法與相關的bt 、 fef 、 fcef 、 la演算法相比，在廣播、分佈、聚合、全聚合等全局通訊操作的性能上，均有不同程國防科學技術大學研究生院學位論文度的提高，並且性能提高百分比基本上隨著集群中計算機結點數目的增加而加大。
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