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Gamma

Gamma的相关文献在1986年到2022年内共计753篇,主要集中在肿瘤学、数学、自动化技术、计算机技术 等领域,其中期刊论文291篇、会议论文3篇、专利文献459篇;相关期刊185种,包括中国原子能科学研究院年报、现代电视技术、核技术:英文版等; 相关会议2种,包括中国中西医结合学会脊柱医学专业委员会2008年学术会议、2008中国平板显示学术会议等;Gamma的相关文献由1589位作者贡献,包括徐鹏、张胜森、郑增强等。

Gamma—发文量

期刊论文>

论文:291 占比:38.65%

会议论文>

论文:3 占比:0.40%

专利文献>

论文:459 占比:60.96%

总计:753篇

Gamma—发文趋势图

Gamma

-研究学者

  • 徐鹏
  • 张胜森
  • 郑增强
  • 杨柳
  • 毛裕民
  • 游维平
  • 谢毅
  • 秦明
  • 刘银森
  • 张承业
  • 期刊论文
  • 会议论文
  • 专利文献

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    • Waqar Hafeez; Nazrina Aziz; Zakiyah Zain; Nur Azulia Kamarudin
    • 摘要: Acceptance sampling is a statistical quality control technique that consists of procedures for sentencing one or more incoming lots of finished products.Acceptance or rejection is based on the inspection of sampled products drawn randomly from the lot.The theory of previous acceptance sampling was built upon the assumption that the process from which the lots are produced is stable and the process fraction nonconforming is a constant.Process variability is inevitable due to random fluctuations,which may inadvertently lead to quality variation.As an alternative to traditional sampling plans,Bayesian approach can be used by considering prior information of the process.Using different combinations of design parameters,this study introduces a Bayesian group chain sampling plan(BGChSP).For the first time in group chain sampling plan,the probability of lot acceptance is derived by using Poisson distribution to estimate an average number of defectives.Gamma distribution is used as a prior distribution with Poisson distribution.Taking into account both consumer’s and producer’s risks,this research considers two quality regions namely,probabilistic quality region(PQR)and indifference quality region(IQR).By minimizing consumer’s and producer’s risks,BGChSP can be used to minimize the average number of defective products in industry.
    • 梅文娟; 李纪; 许金波; 尹小斌; 祝政委
    • 摘要: 本文为了更好的分析ADS型TFT-LCDGamma失效问题,基于像素电极宽度波动(CD)、电极对位(overlap,OL)、PVX膜厚、PVX介电常数、PI膜厚、GAP等几个因素对Gamma波动的影响进行深入分析研究。利用Techwiz软件基于720*1560的6.52in TFT-LCD模组进行模拟,并制作模组样品进行单因子实验验证,最后得出了Gamma模型。实验结果给出了对Gamma影响较大因素1ITO CD、2ITO CD、1-2ITO OL、PVX介电常数、PVX膜厚、PI膜厚、Cell Gap的影响因子系数,得到Gamma影响模型为:Y=0.3494x_(1)+0.424x_(2)^(2)+0.3454x_(2)+0.3281x_(3)^(2)+0.0092x_(3)+0.0006x_(4)-0.2642x_(5)+0.0025x_(6)-0.6668x_(7)+2.2,其中X_(1)为1ITO CD波动,单位为μm;X_(2)为2ITO CD波动,单位为μm;X_(3)为1-2ITO CD波动,单位为μm;X_(4)为PVX厚度,单位为A;X_(5)为PVX介电常数;X_(6)为PI厚度,单位为A;X_(7)为CellGap,单位为μm。为Gamma问题分析及改善提供了理论基础。
    • Michael Bettan; Jonathan Walg; Itzhak Orion
    • 摘要: An alternative Feynman diagram for electron-positron pair production, in which neutrino and antineutrino are also produced on the same pathway, is introduced here. In the proposed pair production process, a portion of the momentum is carried by neutrinos and antineutrinos, allowing the rest of the momentum for the electron-positron pair. Simulations to inspect the proposed pair production process were conducted in this research using the EGS5 code system while modifying its subroutine “PAIR”. Liquid Xenon detector was then positioned in the path of various mono-energetic photon beams ranging from 2.6 to 12 MeV. These simulations were intended to inspect the detectability of the alternative pair production effects on radiation measurements in order to assess the detection conditions. Simulation results provided a comparison between the original pair production process and the proposed pair production process. Spectral results showed that changes in the region around 1 - 2 MeV and in the photopeak region were remarkable, therefore detectable. Further experimental research is recommended based on simulation findings. The alternative pair production process, firstly introduced in this paper, led to production of a larger flux of neutrinos from gamma radiation. This additional neutrino production and its contribution to non-baryonic dark matter are discussed.
    • 谭庆
    • 摘要: 详细介绍了专业的雷达数据处理软件GAMMA和基于GAMMA的双轨D-InSAR数据处理流程;对济宁地区真实L波段的ALOS PALSAR数据进行了双轨D-InSAR处理,完成了从干涉数据的读取到形变图生成的整个流程,并生成了一系列清晰的结果图;结合GIS软件得到研究区的沉降位置、分布和沉降量等信息.研究表明:利用GAMMA软件可以对雷达影像进行双轨D-InSAR处理,得到清晰的中间结果图;双轨D-InSAR可以对矿区进行地面沉降监测,进而掌握由于煤矿开采引起的地面沉降分布和沉降程度,为煤矿区的合理开采和可持续发展提供一定的理论依据.
    • 王懿
    • 摘要: 目的:分析Gamma钉与InterTan钉内固定治疗股骨粗隆间骨折的临床疗效.方法:选取2017年1—12月我院收治的66例股骨粗隆间骨折患者作为观察对象,按照内固定材料不同分为Gamma钉组(A组)和InterTan钉组(B组),各33例.记录两组术中出血量、手术时间、骨折愈合时间及术后并发症发生情况;采用Harris评分分级对两组患者术后临床疗效进行评价.结果:两组患者术中出血量、骨折愈合时间、术后并发症比较差异均无统计学意义(P>0.05);A组患者的手术时间较B组明显缩短(P0.05).结论:Gamma钉与InterTan钉内固定治疗股骨粗隆间骨折均具有较好的临床治疗效果,二者疗效相当,相对后者而言,前者手术时间更短.
    • Monnehan G. Alain; Gogon B. D. L. Huberson; Braffo A. Florentin; Djagouri Koudou; Koua A. Antonin; Kouakou Omer
    • 摘要: Radioactivity is a natural phenomenon present in the universe. So, because of human life solidarity with a habitat, we are permanently in contact, especially through building materials. The objective of this work is the determination of the used cement radioactivity level in the buildings in Cote d'Ivoire. Thus, samples of grey and white cement currently used on Ivorian territory were taken. In order to determine the radioactivity level of this cement, samples were analyzed by using gamma spectrometry chain which contains a NaI (Tl) scintillation detector designed by the German manufacturer LD-DIDACTIC, coupled to a multichannel analyzer (AMC) using a Cassy Lab software. Thus, the specific activity of the primordial radionuclides 226Ra, 232Th and 40K, was able to be determined. The average values obtained are 29.66 Bq/kg, 34.88 Bq/kg and 178.424 Bq/kg respectively for 226Ra, 232Th and 40K. All average values are below the limit values recommended by UNSCEAR. However, we evaluated the radiological parameters such as the equivalent radium activity and the annual effective dose in order to translate the specific activity in terms of harmfulness. Values obtained for these parameters are below those recommended by ICRP and UNSCEAR. These results show that the risk incurred by the use of these different brands of cement is low.
    • Siaka Touré
    • 摘要: The Weibull distribution is a probability density function (PDF) which is widely used in the study of meteorological data. The statistical analysis of the wind speed v by using the Weibull distribution leads to the estimate of the mean wind speed , the variance of v around and the mean power density in the wind. The gamma function Γ is involved in those calculations, particularly Γ (1+1/k), Γ (1+2/k) and Γ (1+3/k). The paper reports the use of the Weibull PDF f(v) to estimate the gamma function. The study was performed by looking for the wind speeds related to the maximum values of f(v), v2 f(v) and v3 f(v). As a result, some approximate relationships were obtained for Γ (1+1/k), Γ (1+2/k) and Γ (1+3/k), that use some fitting polynomial functions. Very good agreements were found between the exact and the estimated values of Γ (1+n/k) that can be used for the estimation of the mean wind speed , the variance σ2 of the wind speed v;around the mean speed and the average wind power density.
    • David K. Potter; Arfan Ali; Salem Abdalah
    • 摘要: This paper proposes a rapid means of identifying clay type and quantifying clay content from new template crossplots that compare magnetic susceptibility measurements with standard borehole well log data. The templates are similar in format to standard industry charts, but have a number of advantages over the commonly used charts. Laboratory measurements of magnetic susceptibility on core samples and drill cuttings have recently shown strong correlations with key petrophysical parameters, particularly clay content and fluid permeability [1] [2]. A new template crossplot between magnetic susceptibility and borehole spectral gamma ray log data can firstly help to quickly identify the types of clay present in the formation. Additional new template crossplots between magnetic susceptibility and borehole bulk density data allow the mineral contents and porosities of binary mixtures of clay minerals and matrix minerals (such as illite clay + quartz) to be rapidly quantified. The templates can use ambient (room temperature) magnetic susceptibility data from measurements on core samples or drill cuttings in the laboratory or at the wellsite. Furthermore, the paper shows how the templates can potentially be extended to utilize borehole magnetic susceptibility data for in situ estimations of the type and content of clay. This requires accounting for the temperature dependence of the magnetic susceptibility of paramagnetic minerals (such as illite clay), which varies with depth in a borehole. Whilst borehole magnetic susceptibility measurements are rarely part of standard well logging operations, they could be a potentially useful tool for in situ clay type and content quantification, which in turn can help predict fluid permeability.
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