查询词典 gamma

Since the gamma function grows very quickly, it can easily overflow, and so the logarithm of the gamma function is often more useful than the gamma function itself.

由于伽玛函数的生长速度非常快，很容易溢出，所以伽玛函数的对数通常比更有用伽玛函数本身。

Some of the other gamma-related functions in SciPy include the incomplete gamma function gammainc, the beta function beta, and the logarithmic derivative of the gamma function psi.

其他一些γ- SciPy有关的职能包括：不完全伽玛函数gammainc，测试版功能测试，以及防扩散对数伽玛函数的导数。

The gray balance curves were obtained by the gray balance function and regression analysis. The main works: The parameters in the mathematic models were ascertained, as well as all the regression functions. The models included the relation between the ink quantity and the solid density, the relation between the gamma and printing contrast, the printing reproduction curves, the dot-gain curves and the dot-gain compensation curves. The fitting accuracies of the regression models were checked out by the correlation coefficient or multiple correlation coefficients. The effect that the ink had on the solid density and the gamma on the printing contrast were analyzed. And the methods of choosing the ink and gamma were gained.

主要工作：确定了墨量与样张实地密度、γ与相对反差、阶调复制曲线、网点扩大曲线以及网点扩大补偿曲线各自数学模型中的参数，得到了回归表达式；得到了各个回归表达式的相关系数或复相关系数，检验了回归模型的拟合程度；分析了墨量对实地密度的影响以及γ对相对反差的影响，并提出了墨量和γ的选取方法；得到了喷墨印刷质量控制的灰平衡控制、网点扩大以及扩大补偿规律。

We use the approximate distribution comes from probability generating function of CreditRisk+ to value the CDO under the single sector factor and multi-sector factors scenarios. For single sector factor model, we discuss the sensitive analysis of CDO fair spread by different default probability, default correlation and loss given default. For multi-sector factors model, we exam the CDO fair spread based on different sector correlation assumption, such as Gamma distribution in moment match method, multivariate Gamma distribution and compound Gamma distribution.

本文在信用风险加成模型之下，利用机率产生函数的近似分配评价抵押债务债券，并考虑单一部门因子与多个部门因子，单一部门因子中，在不同违约机率、违约相关系数和违约损失率下，探讨抵押债务债券公平价差之敏感度分析；多个部门因子中，在不同相关性部门因子分配假设下，如动差配适法的伽玛分配、多维伽玛分配、复合伽玛分配，探讨抵押债务债券公平价差之方法结果比较。

It is suggested by our test work on radon mapping of geology that there is a good coincidence between the data got from gamma-ray spectrometer and radon monitor and the U、Th、Ra、K data got from indoor gamma-ray spectrometer and radiochemistry method; the data of gamma-ray spectrometer and radon monitor are also comparative to the 1∶20 ten thousand geochemistry data of U、Th、 Ra (calculated by the equilibrium coefficient between U and Ra) and radon concentrations measured by solid state nuclear track detector .

在国内首次利用地质勘探费用进行氡地质填图方法试验，该试验方法结果表明，利用国产的现场能谱仪、测氡仪获得的数据与室内能谱仪、化学法测得的铀、钍、镭、钾结果一致；与已有的1∶20万区域地球化学数据铀、钍、镭（由铀、镭平衡系数计算得出）、钾和固体核径迹累积法测氡数据具有很好的可比性。

Effects of gamma irradiation on shoot regeneration from leaf and bud growth in vitro of strawberry 1 The leaf was very sensitive to the gamma irradiation, and 'Toyonoka' was more sensitive than 'Akihime'. The LD50 (50% decrease of generation) of strawberry leaf was between 10 and 20 Gy. 2 Strawberry leaves were inoculated in vitro at 8 d-15 d after gamma rays irradiation, and the shoot regeneration rate from of 'Toyonoka' increased at 10 Gy and almost no difference from 20 Gy to 40 Gy. The positive effect dose for 'Akihime'.was from 10 Gy to 30 Gy, however, 40 Gy decreased shoot regeneration rate.

2.60Co γ辐射对不同品种草莓离体叶片再生及芽生长的影响 1）叶片对辐射敏感，叶片再生的半致死剂量为10 Gy-20 Gy，'丰香'品种比'章姬'品种敏感； 2）辐射后8 d-15 d接种，'丰香'叶片的不定芽再生率在剂量10 Gy呈上升趋势，而其他剂量则几乎未见有变化，'章姬'在剂量10 Gy-30 Gy，叶片的不定芽再生率提高较大，40 Gy仍表现轻微下降； 3）适宜的辐射剂量对草莓试管苗增殖有促进作用。

The clinic of nursing care have documented that large dose injection of gamma globulin can prevent and cure the complication of aeteria coronaria , large dose intravenous drip of gamma globulin,2g/kg,intravenous drip slowly in 8 to 12 hours, gamma globulin has two therapeutic actions including immune vicariousness and immune accommodation. It can improve the patients' IgG level of blood quickly after intravenous drip of gamma globulin.

护理临床已证明大剂量丙种球蛋白注射，可有效防治川崎病时冠状动脉并发症，大剂量丙种球蛋白静脉滴注，2g/kg，于8-12h缓慢输入，丙种球蛋白具有免疫替代和免疫调节双重治疗作用，经静脉输入后，能迅速提高患儿血液中的免疫球蛋白

Regular measured parameters in CBM uncased hole have gamma-ray,long and short spaced artificial gamma,spontaneous potential,dual lateral,dual caliper,acoustic,compensated neutron,well temperature and deviation etc,while gamma-ray,acoustic amplitude,acoustic variable density...

煤层气裸眼井常测的参数有自然伽马、长短源距人工伽马、自然电位、双侧向、双井径、声波、补偿中子、井温、井斜等，而固井质量检查测井则用自然伽马、声幅、声波变密度和磁定位等方法。

The study about the flux and index of gamma-ray loud blazars show:(1)there is significant correlation between the luminosities in gamma-ray and VLBI radio energy band;(2)there are strong anticorrelarions among the observed indices of soft X-ray, hard X-ray and gamma-ray. For the FSRQs, the whole X-ray emission was contributed by synchrotron self-Compton emission, for the HBLs, the X-ray emission was dominated by synchrotron emission while the soft X-ray emission is dominated by synchrotron emission and the SSC emission dominate the hard X-ray energy band for LBLs;(3) there are strong radio-radio and radio-optical flux correlations for the quasar 3C 273. The higher frequency emission leads those in lower frequency. The multi-band complex indices strongly correlated with the high frequency flux which implies that the object is becoming bright when the energy spectrum is harden.

通过对γ噪Blazar天体的谱指数、流量的相关研究，发现（1）51个样本blazar的γ射线光度与VLBI光度之间存在显著相关；（2）软X、硬X以及γ波段的观测谱指数之间存在较强的反相关，对FSRQs，无论是硬X射线还是软X射线的辐射都是逆康普顿辐射的贡献，而对于HBLs来说，则是同步辐射的贡献，对LBLs，在软X射线波段以同步辐射贡献为主，在硬X射线能区以逆康普顿贡献为主；（3）3C 273的射电各个波段以及光学之间存在强相关，高频辐射一直领先低频辐射，3C 273的多波段复合谱指数和高频流量之间存在强的反相关，意味着当能谱变硬时对象变亮。

The accumulated self-exciting dose for Na-24 is only 1.12 mGy during its average life-time for irradiation of total thermal neutron fluence of 3.6E12 nth/cm^2. Conclusions: Because of the self-exciting dose reduced from neutron activation can be neglected for gamma dose measurement in neutron and gamma mixed field, and the threshold of linear response is 2 Gy, the FWT-70-40 dosimeter not only can be used for high dose rate Co-60 irradiation field and the high energy electron beam for medical purpose, but also can be used for gamma dose measurement in an epithermal neutron beam for boron neutron capture therapy.

型号FWT-70-4OM）剂量计於BNCT高中子通量与剂量的中子、加马混合辐射场所产生的自激剂量，对加马剂量度量干扰可忽略，且对加马的最低剂量限值为2Gy，因此除可应用於钴60加马高剂量辐射场与放射治疗用高能量、高剂量电子射束的剂量度量外，亦可应用於BNCT照射治疗用高能量、高剂量的中子、加马混合辐射场的加马剂量度量。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐