neutron data 中文意思是什麼

neutron data 解釋
中子數據
  • neutron : n. 【物理學】中子。n. -ics 中子（物理）學。
  • data : n 1 資料，材料〈此詞系 datum 的復數。但 datum 罕用，一般即以 data 作為集合詞，在口語中往往用單數...
  1. There has been many papers to discuss the in - medium quark and gluon condensates in nuclear matter which use the models with su ( 2 ) l su ( 2 ) r sym - metry. now, we make use of the chiral model su ( 3 ) l su ( 3 ) n including the baryon octet to discuss the quark condensate < qq > in strange matter, where q is an up or down quark field. on the one hand, from the experimetal data, it is found that < qq > vac = - ( 225 25mev ) 3, on the other hand, with the hellmann - feynman theorem, quark condensate can be evaluated on the hadronic level. in this paper, we will investigate the quark condensate in strange matter with the chiral symmetry su ( 3 ) l x su ( 3 ) rspontaneous breaking lagrangian to obtain the variation of the quark condensate in the strange matter when the baryon number change. it can be applied to understand the neutron stars when the neutron star are considered to be constructed by the strange matter. because nertron stars are homogeneous and at very low temperature, we will use the mean - field approximation and zero temperature throughout this paper

    鑒于已有大量文獻討論了核物質中的夸克凝聚，本文將討論在奇異物質中的夸克凝聚。而在介質中的夸克凝聚的基本公式可由hellmann - feynman理論導出，所以運用手征對稱自發破缺拉氏量以及平均場近似，我們就可以討論在奇異物質中的夸克凝聚，由所計算的結果表明： （ 1 ）奇異物質中的夸克凝聚隨奇異物質密度的增大而單調減小。 （ 2 ） -凝聚的出現對衰減率有影響。
  2. Our results show that with the up to date experimental data, 13c can not sufficiently burn, the neutron number density decrease, the timescale of neutron source become long and these come into conflict with model of thermal pulse agb star

    研究結果表明，在新實驗結果下， 』 3c不能充分燃燒，中子數密度降低，中子源持續的時標變長，這與熱脈沖agb星的現有模型出現矛盾。
  3. Cinda computer index neutron data

    中子數據計算機索引
  4. According to the demands of neutron scattering instruments to be built at china advanced research reactor ( carr ), the designs of several new instruments, i. e. two cold neutron guides ( cng ), one neutron stress diffractometer and one high resolution neutron powder diffactometer ( hrpd ), have been simulated and optimized using monte - carlo simulation softwares, mcstas and vitess, first. requirement on the size of the cold neutron source ( cns ) by cngs has been also studied. the results of this thesis have provided essential data as a basis of the neutron instruments designs

    本論文結合當前中國先進研究堆（ chinaadvancedresearchreactor ， carr ）中子散射工程譜儀建設的迫切需要，選擇國際上廣泛使用的通用中子散射譜儀模擬軟體mcstas和vitess作為模擬研究工具，首次對若干臺新建譜儀的設計方案進行了全面的模擬和優化研究，包括兩條冷中子導管、中子應力衍射儀和高分辨中子粉末衍射儀，並配合冷源設計研究了導管對冷源尺寸的要求。
  5. According to the demand of the concept design of china spallation neutron source ( csns ), the target station, i. e. the target, the reflector and the moderator have been simulated and optimized using monte carlo simulation software, nmtc / jam and mcnp4a, firstly. the neutron flux escaping from the target and the moderator and the heat deposition in the target, the reflector and the moderator are calculated. these results provided essential data as a basis of the spallation neutron source design

    本論文結合當前中國散裂中子源（ chinaspallationneutronsource ， csns ）工程概念設計的迫切需要，選擇國際上廣泛使用的基於蒙特?卡羅方法，用於模擬粒子輸運過程的程序mcnp4a和nmtc jam作為研究工具，首次對csns靶站進行了全面的模擬與優化，內容包括靶、反射體與慢化器系統的中子通量分佈以及熱量沉積，同時計算了靶的溫度場與應力場分佈。
  6. A new method of data processing used in pulse fast thermal neutron analysis technology is introduced

    摘要介紹了一種應用於脈沖快熱中子分析技術中的新解譜方法。
  7. To investigate the space / time distributions and occurrence and evolution of such events, the diffusion pattern over deserts, turbulent transfer features in sandstorm weather, the particle size distribution, mass concentration and its distribution, optic properties, chemical composition and physical factors responsible for the initiation of raising sands, we made integrative observation and sounding of sandstorms deep in the large - scale desert area, including tengri, badanjilin and maowusu, with the items consisting of micrometeorological measurement, 3d wind observation, data from kb - 120 and anderson samplers of mass concentrations of sands with their spectrum, the distribution of aerodynamic particle sizes from the aps3310a, retrieval of aerosols " optic depth from sunphotometer data, assay of the chemical composition by means of neutron activiation analysis ( naa ) and integrated study of all related factors for causing sandstorm to occur, based on the observations of all kinds

    利用所取資料，系統分析了不同強度沙塵天氣條件下沙塵氣溶膠質量濃度和質量濃度譜、粒子譜分佈、光學厚度、化學組分等特徵；綜合分析了影響沙塵起動的諸物理因子在沙塵起動中的作用；用沙塵輸送模式對一次沙塵暴天氣造成的泥雨過程的形成機制進行了模擬。歷史氣象資料統計分析表明，沙塵暴有其高發期（ 4 、 5月）和高發時段（ 14 - 20時） ， 14時到20時之間發生的沙塵暴約占沙塵暴總次數的66 。揚沙和沙塵暴天氣條件下，湍流動量通量和湍流感熱通量都是重要的湍流交換，沙塵暴發生前近地層的超絕熱不穩定對沙塵暴天氣有加強作用。
  8. Project on neutron flux density data acquisition system with multiple space - time channels based on a microcomputer

    多時空通道中子注量率密度數據採集系統方案設計
  9. The study on fast neutron physics and relative technique of experiment and data analysis made at a pulsed neutron generator in beijing normal university during recent yeras is introduced

    摘要綜述近年來在北師大低能所的國內第一臺脈沖化高壓倍加器上開展的快中子物理，及有關的實驗和數據處理技術研究。
  10. In addition, the study shows that the cmes " traveling direction is also an important factor, which influence the intensity of the geomagnetic storms. we also analyzed gcrs data from beijing super - neutron - monitor ( snm ) by using fft and power spectrum method

    我們對cme運動方向與磁暴強弱的關系進行了初步的研究，研究表明，同樣條件下，正對磁層頂的cme形成的磁暴更強，即cme的運動方向是影響磁暴強弱的一個重要因素。
  11. Vanadium is a candidate element for the first wall material of iter project. so its neutron data are very important. this is the main reason we did such measurement

    ~ （ 51 ） v是iter工程中第一壁材料的候選核素，在強的14mev中子輻照下長壽命剩餘放射性較少，是重要的結構材料，因此它的一些中子核數據是必須的。
  12. All the neutron reaction data evaluation of natural hf and its six isotopes is a project assigned to zhengzhou university by the general equipment department, the general nuclear industry company of china and the chinese nuclear data center in the " ninth - five "

    天然hf及其6種同位素的全套中子核反應數據評價是「九五」期間，總裝備部、中國核工業總公司和中國核數據中心下達給鄭州大學的科研項目。
  13. The ddx of neutron emission is one of the most important nuclear data in nuclear design. more precise nuclear data, not only nuclear reaction data but also energy and angular distributions, are required by the development of nuclear engineering

    次級中子雙微分截面是核工程設計中重要的核數據之一，隨著對核工程設計要求的日益提高，對核數據的要求也越來越高，不僅要求有精確的核反應截面數據，還要有精確的能譜和角分佈數據。
  14. Mastering the output format of covariance of neutron cross section in endf / b - 6 evaluated nuclear data library, clearly understanding the meaning of each physical quantity, grasping the mathematical methods pf covariance for experimental nuclear data and evaluated nuclear data, a set of evaluation processing method was deduced from the meaning of cross sections and errors. and then a program was developed for evaluating and processing the covariance matrix of experimental data, which are output in the endf / b - 6 format

    在熟悉endf / b - 6評價中子核數據庫協方差文檔的格式要求，確定各個量的物理意義，並掌握實驗和評價數據的協方差數學處理方法的基礎上，由截面數據及截面誤差的物理意義，推出了一套合適的評價處理方法，最後編寫了按endf / b - 6格式輸出的協方差數據評價處理程序，作為中國評價中子核數據庫（ cendl ）協方差文檔的數據輸出程序。
  15. In this dissertation, a analytic solution of neutron source of s - process in agb star has been given. with the up to date experimental data of 13c (, n ) 16o and 12c ( n, y ) 13c reaction rate, we carry out a analytic research for neutron source of s - process

    中國原子能科學研究院博士學位論文本文給出了agb星s - -過程中子源的一個解析解，並利用』 3c （ a ， n ） 『 60反應最新實驗數據和我們研究得到的』 zc （ n ，力』 3c反應的截面和核反應率，對s - -過程的中子源進行了解析研究。
  16. Even if you start with something ( like a bump on a rotating neutron star ) that gives off a perfect sine wave signal, it won ' t stay that way by the time it gets into the data stream

    即使你開始時探測到一個完美的正弦波信號，等到記錄它的時候可就是另外一個樣子了。
  17. The measurement data is scarce in 8 - 13 mev region due to the lack of mono - energetic neutron sources ( in this region, there are breakup neutrons besides the mono - energetic neutrons in the often used neutron sources such as t ( p, n ) 3 he and d ( d, n ) 3he sources. the secondary neutrons induced by breakup source neutrons will seriously contaminate the secondary neutron spectra induced by mono - energetic source neutrons ). therefore, precise measurement for some key nuclides is necessary to check the evaluations in this region

    但在8 ? 13mev這一能區，由於沒有合適的單能中子源（因為在這一能區，對于常規中子源如t （ p ， n ） ~ 3he和d （ d ， n ） ~ 3he中子源，除了單能中子以外，還有破裂中子成份，這部分源破裂中子在樣品上引起的次級中子，將嚴重影響測量結果） ，所以至今在8 ? 13mev能區這方面的測量數據極少。
  18. Moreover, precise experimental data are the base of theoretical models and calculations. up to now, at about 14 mev, there are some ddx measurement data because the t ( d, n ) 4he reaction is a good mono - energetic neutron source. below 8 mev, there are also some measurements because mono - energetic neutron source is available in this region

    到目前為止，在14mev附近，由於有很好的t （ d ， n ） ~ 4he單能中子源，所以次級中子雙微分截面的測量數據較多，在8mev以下，也可以得到很好的單能中子源，所以也有一些測量數據。
  19. This paper analyzed the data obtained at mcmurdo and thule neutron monitor ( nm ) stations and at guangzhou muon monitor station during the cme event in march 1991. the results show that in this event when the cme structure passed the earth, it was shifted to the earth ' s southern hemisphere and the strongest magnetic structure associated with the cme passing the earth at about 2000ut, march 24. 1991

    我們利用mcmurdo和thule兩個臺站的銀河宇宙線強度的觀測數據和廣州多方向介子探測器記錄的宇宙線強度的數據分析了1991年3月cme的特徵，注意到cme是一定程度地偏向地球的南半球，並給出了cme中最強的磁場結構到達磁層的時間為1991年3月24日2000ut左右，這是過去沒有注意到的一個特徵。
  20. Neutron data and covariance data evaluation of experimental data for 63, 65, natcu

    銅及其同位素的實驗中子數據及協方差數據評價
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