particle collisions 中文意思是什麼
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Antiparticles are created elsewhere in the universe where there are high - energy particle collisions, such as in the center of our galaxy, but none have been detected that are residual from the big bang, as most normal matter is [ 1 ] ( http : / / science. nasa. gov / headlines / y2000 / ast29may _ 1m. htm )
科學家在1995年成功生產了氫的反原子，以及反氘核核子，由一個反質子和一個反中子生成，僅僅還不能是更為復雜的反物質。 -
In this technique, the particle density in the beam is very low ( typically 105 thickness ), so perturbations from collisions and inter - ionic fields are absent
而且離子密度低（一般密度為10 ~ 5 cm ~ 3 ） ，因此不會出現自吸收、碰撞退激發以及離子間場效應等現象。 -
In high energy neutrino - emulsion collisions, the normalized distribution of two - particle relative pseudorapidity and the correlation between the mean maximum number density of shower particles and multiplicity are investigated
摘要論述了高能中微子與核乳膠碰撞中，歸一化的兩粒子相對鷹快度分佈，和平均最大簇射粒子數密度與多重數的關聯。 -
The amount of light yielded by fluors from the collisions of a β particle is diminishingly small.
熒光體粒子碰撞，發射出的光量很小，而且繼續縮小。 -
Therefore, studying particle collisions is like " looking back in time ", recreating the environment present at the origin of our universe
因此，研究粒子碰撞就象在時間中追憶，重建宇宙早期時的環境。 -
Physicists investigating heavy - particle collisions believe they are on the track of a universal form of matter, one common to very high energy particles ranging from protons to heavy nuclei such as uranium
研究重粒子對撞的物理學家相信，他們正在尋找某種物質的普遍結構，也就是尋找一種從質子到重核（如鈾核）的超高能粒子共同結構。 -
In high energy experiment we measure the distribution of moment and energy and angled distribution of the outgoing particles that were produced by particle ' s collisions in different type of accelerators
粒子物理實驗主要利用各種加速器射出的高能粒子相互碰撞產生新的出射粒子，然後對出射粒子的出射動量、能量、強度和角分佈進行測量。 -
The isospin effect and k production in intermediate and high energy heavy ion collisions ( hics ) are hot topics in the nuclear physics. based on the isospin - dependent quantum molecular dyanmics ( iqmd ) model and self - consistent relativistic boltzmann - uehling - uhlenbeck ( rbuu ) model, we have studied them and obtained some interesting results. as for the study of isospin in intermediate energy hics, we ' ve investigated how both stength ( q ) and density dependence of symmetry potential ( sp ) affect many measurable observables, such as the yield, phase - space, and isospin distributions of fragments, as well as the correlations between intermediate - mass - fragment ( imf ) multiplicity n and charged - particle multiplicity n, light - charged - particle ( lcp ) multiplicity n, and neutron multiplicity n,
在中能重離子碰撞的同位旋研究方面，分別研究了對稱勢的強度（ c _ s ）和其密度依賴形式對中能重離子核反應各類碎片產物產額、相空間、及其同位旋的分佈，中等質量碎片多重數（ n _ （ imf ） ）與帶電粒子多重數（ n _ c ） 、輕帶電粒子多重數（ n _ k ） 、中子多重數（ n _ n ）的關聯等多種實驗觀測量的影響，以獲取對稱勢中該兩方面的信息，尤其著重於研究如何分別獲取有關該兩方面的信息的途徑。 -
Discrete particle models can be classified into deterministic method and stochastic method in accounting for the particle collisions
在離散顆粒模型中，根據對顆粒間碰撞過程的處理方法的不同可分為確定性模型和隨機性模型。 -
Particle ratios embody the chemical equilibrium driven by inelastic interaction during rapid expansion when the temperature decreases in the colliding system, the measured hadron ratios provide the chemical composition of the fireball at the chemical freeze - out point and access the baryon transporter stopping ) for the initial conditions at early stage of the collisions. in this paper, we study the anti - proton to proton ratio from ig7au + 197 au collisions, analyzing p / p ratio as functions of rapidity, transverse momentum and centrality at ^ / saw = 200gev and the dependence on the center of mass energy of p / p ratio, compared with the experimental results. it shows that the p / p ratio has n ' t obvious dependence on rapidity for mid - rapidity, but shows a slight increase trend with pt increasing in the range of pt < 1gev / c for mini - bias or central collisions, and rqmd shows a more remarkable correlation between p / p ratio and centrality than experiments do at snn = 200gev
研究表明：對廠在中心快度區沒有明顯的快度依賴性，在越靠近邊緣快度區， p p呈下降趨勢；在對心碰撞或者最小無偏事件中， p p在低橫動量區域隨著橫動量的升高而增大； p隨著碰撞對心度的比實驗結果表現出稍強的隨對心度增大而減小的趨勢，尤其是有再散射ujrqmd模型；在中心快度區， p p隨著碰撞的質心能量的提高而快速的增大，與實驗結果一致；在低能，有末態粒子再散射的d較好的預言了的：但是在mc能量下，有末態粒子在散射的d所預言的p p值比實驗值要小。 -
We successfully apply the two - fluid model ( tfm ) to the study of two dimensional and three dimensional dense gas - solid flow characteristics. the results show some rules on the particle collisions and gas particle interactive influence of the vertical upward pipe
在對高濃度氣固兩相流的研究中，成功的運用雙流體模型對兩維和三維垂直立管段進行了研究，揭示了垂直立管內的高濃度氣固流動的顆粒碰撞以及氣相和顆粒相的相互影響的一些規律。 -
The improved lagrangian stochastic model has attributed to the successful prediction of the turbulence inhomogeniety, turbulence anisotropy, and particle crossing - trajectories effect. the collisions between the particles are also considered in this thesis. numerical results for the particles trace and collection efficiencies in the cyclone separator were compared with available experimental data and with theoretic models
為了驗證以上固體顆粒運動模型及修正的湍流模型，文中給出了顆粒在水平管道和u形撞擊式分離器中的運動，比較了不同顆粒軌跡模型的特點及運動行為對流體湍流強度的影響。 -
The physics implication of the pt integrated v % magnitude as a function of particle mass is also discussed. erraticity analysis provide new opportunity in measuring event by event fluctuations in high energy nuclear collisions
對于這類事件，我們應相對於它們初始的方位角不對稱的方向來研究它們，而這一方向由它們各自碰撞參數的取向和大小完全決定。 -
Using rqmd to generate 80, 000 monte carlo mini - bias events of 197au + 197 au collisions at snn = 200gev, we study the transverse momentum distribution, particle ratios and the freeze - out time and transverse radius distributions of final state hadronic system, comparing them with the reported experimental results
通過研究末態強子的橫動量分佈以及粒子比，特別是對帶電、 k 、 p和（ ? ）的平均橫動量的研究及與實驗比較，我們試圖研究在高能核碰撞中早期部分子集體行為。 -
In the accretion disks in binary systems or at the centers of galaxies, particle collisions would produce an inflow of mass that is too small by many orders of magnitude to produce the brilliant luminosity of these disks
在雙星系統或星系中心的吸積盤中，粒子的碰撞只會引起很少的質量向內流動，距離要產生可達到這些圓盤的耀眼亮度，還差了許多個數量級。 -
In the near bed region, the turbulent intensities are elevated above those of water at a rate proportional to particle size due to collisions and velocity gradient
床面附近，顆粒脈動強度大於流體的脈動強度，且粒徑越大，脈動強度越大。
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