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优先发表栏目展示本刊经同行评议确定正式录用的文章,这些文章目前处在编校过程,尚未确定卷期及页码,但可以根据DOI进行引用。
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粒子物理理论
Rare\begin{document}${{\Lambda_b \rightarrow \Lambda l^+ l^- }}$\end{document}decay in the Bethe-Salpeter equation approach

Liang-Liang Liu, Xian-Wei Kang, Zhen-Yang Wang, Xin-Heng Guo
, doi: 10.1088/1674-1137/44/8/083107
摘要:

We study the rare decays

\begin{document}$\Lambda_b \rightarrow \Lambda l^+ l^-~(l=e,\mu, \tau)$\end{document}

in the Bethe-Salpeter equation approach. We find that the branching ratio is

${\rm Br}(\Lambda_b \rightarrow \Lambda \mu^+ \mu^-)\times 10^{6} = 1.051 \sim 1.098$

in our model. This result agrees with the experimental data well. In the same parametric region, we find that the branching ratio is

${\rm Br}(\Lambda_b \rightarrow \Lambda e^+ e^-(\tau^+ \tau^-) )\times 10^{6} = 0.252 \sim 0.392 ~(0.286 \sim 0.489)$

.

论文
Single-photon avalanche diode imagers in biophotonics: review and outlook
Claudio Bruschini, Harald Homulle, Ivan Michel Antolovic, Samuel Burri, Edoardo Charbon
, doi: 10.1038/s41377-019-0191-5
摘要:
Single-photon avalanche diode (SPAD) arrays are solid-state detectors that offer imaging capabilities at the level of individual photons, with unparalleled photon counting and time-resolved performance. This fascinating technology has progressed at a very fast pace in the past 15 years, since its inception in standard CMOS technology in 2003. A host of architectures have been investigated, ranging from simpler implementations, based solely on off-chip data processing, to progressively "smarter" sensors including on-chip, or even pixel level, time-stamping and processing capabilities. As the technology has matured, a range of biophotonics applications have been explored, including (endoscopic) FLIM, (multibeam multiphoton) FLIM-FRET, SPIM-FCS, super-resolution microscopy, time-resolved Raman spectroscopy, NIROT and PET. We will review some representative sensors and their corresponding applications, including the most relevant challenges faced by chip designers and end-users. Finally, we will provide an outlook on the future of this fascinating technology.
减灾智能服务
新时代应急测绘保障技术体系框架设计
赵勇, 刘万增万增万增, 李然, 朱秀丽, 翟曦
, doi: 10.13203/j.whugis20200134
摘要:
应急测绘保障工作是中国综合防灾减灾工作体系的重要组成部分,在重大自然灾害及突发事件处置中的作用日益凸显。应急测绘保障工作存在现场信息快速获取能力不足、数据处理系统快速反应能力不强、应需服务能力不够、无法充分快速共享应急地理信息等问题。根据应急测绘保障工作的特点,基于国家应急测绘保障能力建设项目成果,提出了新时代应急测绘保障技术体系的总体思路和总体框架,实现对灾害现场信息“看得清、传得快、用得好”,并阐述了主要环节的关键技术进展,展望了其在地质灾害防治中的应用。