搜索结果: 1-15 共查到“Gem”相关记录38条 . 查询时间(0.078 秒)
研制并测试了GEM中子探测器的512通道高计数读出电子学系统，以满足中国散裂中子源高效率、高分辨、高通量二维位置灵敏中子探测器的需求。系统以Kintex-7 FPGA作为系统控制和数据分析的核心，使用8块AS20Board前端芯片对灵敏面积为200 mm×200 mm的探测器的两个维度的信号进行读出，读出通道为256×256。读出数据经FPGA分析后通过千兆以太网传输至计算机显示。计算机可通过千兆...
基于GEM工艺的裂变时间投影室性能模拟研究
裂变时间投影室 GEM 电子漂移 径迹重建
2021/1/8
基于GEM工艺的裂变时间投影室具有探测效率高和空间分辨率高的特点，可实现裂变产物的多参量测量。本文主要研究基于GEM工艺的裂变时间投影室在不同条件下的测量精度，使用Garfield++软件计算得到裂变时间投影室中不同的裂变产物质量数测量误差约为4～6 u，并通过时间信息的径迹重建研究了裂变碎片在不同工作气体中的角度分辨。研究发现，电子漂移时间长的工作气体中，裂变产物具有更好的角度分辨，并可依此在实...
作为一种新型微结构气体探测器(MPGD)，厚型气体电子倍增器（THGEM）用于较高能量光子探测是新的尝试。为了解其探测机理及探测效率的主要影响因素，利用多粒子输运软件、多物理耦合仿真软件及气体电离模拟软件，分别建立了光子与探测器相互作用模型、电子漂移扩散模型和气体电离模型。通过仿真得到了漂移极内表面和膜上电极的电子出射概率，137Cs在漂移极内表面产生激发电子的能量分布和角分布。动态模拟了电子在特...
由于电子动理学效应的影响，等离子体杂质输运和湍流会跟随电子离子温度之比发生变化，进而影响约束性能。实验上通过射频波加热提高电子温度，此时等离子体具有很强的轫致辐射，同时重杂质线辐射进入软X射线波段。利用二维GEM相机观察软X波段的辐射，其反演过程不依赖平衡位形，在分析宏观扰动和杂质输运方面具有优势。芯部电子温度～3keV时，高电离态铁对GEM计数率贡献显著增强。高约束ELM-free至ELMy转化...
近期，等离子体所李二众团队在EAST高电子温度（芯部电子温度8keV）H-mode运行中，利用GEM相机在国际聚变领域首次测得软X射线波段能谱在二维空间（R-Z）上的分布。为研究EAST芯部重杂质种类、分布以及R-Z空间上的大尺度输运等物理过程奠定了实验基础。
GEM–THE FIRST GI ERASMUS MUNDUS MASTERS COURSE
Capacity building Education Spatial science
2015/12/22
The Master of Science course “Geo-information Science and Earth Observation for Environmental Modelling and Management”(GEM) is an 18 months GI education offered by four European Universities. In this...
C-GEM (v 1.0): a new, cost-efficient biogeochemical model for estuaries and its application to a funnel-shaped system
cost-efficient biogeochemical model estuaries and its application funnel-shaped system
2014/12/19
Reactive transport models (RTMs) are powerful tools for disentangling the complex process interplay that drives estuarine biogeochemical dynamics, for assessing the quantitative role of estuaries in g...
Anatomy of the Gem OB1 molecular cloud complex
Gem Molecular cloud Molecular gas Form Star formation
2014/12/9
I have conducted an extensive study of the Gem OB1 molecular cloud complex in order to determine the global morphology of the molecular gas and how the morphology is correlated with the distribution o...
重磁电方法及应用国际研讨会（GEM Chengdu 2015）通知。
肺癌细胞株中GEM和CDDP药物敏感性相关基因的研究
cDNA macroarray MTT比色分析法 肺癌细胞株 药物敏感性 GEM CDDP
2013/12/10
筛选小细胞肺癌（small cell lung cancer, SCLC）和非小细胞肺癌（non-small cell lung cancer, NSCLC）细胞株中与健择（gemcitabine hydrochloride, GEM）和顺铂（cisplatin, CDDP）药物敏感性相关的基因，有助于进一步阐明抗癌药物作用机制，为克服抗癌药物的耐药性、研制开发新的抗癌药物提供新线索，同时也将为临...
The experimental data of the COSY-GEM collaboration for the recoil-free transfer reaction p(27Al,3He)π−p′X, leading to the formation of bound state of eta (η) meson in 25Mg nucleus, is reanalyze...
Atmospheric gaseous elemental mercury (GEM) concentrations and mercury depositions at a high-altitude mountain peak in south China
Atmospheric gaseous elemental mercury concentrations mercury depositions high-altitude mountain peak
2010/3/16
China is regarded as the largest contributor of mercury (Hg) to the global atmospheric Hg budget. However, concentration levels and depositions of atmospheric Hg in China are poorly known. Continuous ...
An X-ray imaging device based on a GEM detector with delay-line readout
delay-line readout gas electron multiplier (GEM) X-ray imaging
2009/12/24
An X-ray imaging device based on a triple-GEM (Gas Electron Multiplier) detector, a fast delay-line circuit with 700 MHz cut-off frequency and two dimensional readout strips with 150 μm width on the t...
Entrepreneurship,Welfare Provision,and Unemployment:Relationships between Unemployment,Welfare Provision,and Entrepreneurship in Thirty-seven Nations Participating in the Global Entrepreneurship Monitor (GEM) 2002
Entrepreneurship Welfare Provision Unemployment Welfare Provision Entrepreneurship
2009/11/6
Small businesses make an important contribution to the success
of a country’s economy. They are major creators of jobs,1 they
innovate,2 and spot and exploit new opportunities.3 Even though
many ne...