16信道0．35μmCMOS／VCSEL光发射模块

研究了垂直腔面发射激光器（VCSEL）及其列阵器件的光谱特性、调制特性、高频特性及与微电子电路的兼容性，将1×16的VCSEL与CMOS专用集成电路进行多芯片组装（MCM），混合集成为16信道VCSEL光发射功能模块。测试过程中，功能模块的光电特性及其均匀性良好，测量的-3dB频带芝宽度大于2GHz

广西巴马地区长寿老人 ApoE 基因多态性与认知功能的关系

目的:研究广西巴马地区长寿老人载脂蛋白E（ApoE）基因多态性的分布及其与认知功能改变的关系。方法:采用简易精神状态量表（MMSE）对112例90岁以上广西巴马地区长寿老人进行认知功能检查,并用限制性酶切片段长度多态性分析（PCR-RFLP）方法进行ApoE 基因分型。根据MMSE 得分将研究对象分为认知功能正常组和认知功能障碍组.比较两组人群的基因型、基因频率的分布特征。结果:巴马长寿老人中发生认知功能障碍者占14.29%。长寿老人中ApoEε3/3基因型分布的百分比最大,其次是ε2/3,而ε4/4最少。ApoE 各基因型和等位基因频率认知功能正常组和认知功能障碍组相比较,ε4等位基因频率认知障碍组明显高于认知正常组（P<0.01）,ε4基因携带者认知功能障碍发生率明显高于其他基因携带者。结论:巴马地区长寿人群中,ApoEε3/ 3为最常见的基因型,而ε4/4最少;ApoE 基因多态性与巴马长寿老人认知功能改变有关联;ApoEε4基因仍然是长寿老人认知功能障碍发病的危险因子,较低的ApoEε4等位基因频率可能是巴马地区长寿老人认知功能保存较好的原因之一

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies