the research of Chinese Advertising Industrial Organisation

广告业是第三产业中很重要的一个部门。广告对拉动消费、扩大内需都有着积极的作用。随着市场经济体制的逐步确立，我国的广告产业从无到有，发展迅速，具有极大的发展前景。但自从我国对外开放广告业以来，我国广告产业正在经历着巨大变化，外资企业的进入和对国内企业的并购，虽一定程度地改变着我国广告产业市场集中度低的局面，但外资的加入竞争也使我国广告产业组织原本就存的问题更加凸显。因此，有必要从产业组织角度对中国广告产业进行比较系统的研究。 本文从我国广告产业的发展历程和现状出发，运用产业组织理论中SCP框架对广告产业的市场结构、市场行为和市场绩效等进行了分析，并指出了我国广告产业组织存在的主要问题。 我国...The Advertising Industry has played an important role in chinese economy. Domestic consumption can be actively increased by advertising. Starting from stratch, Chinese Advertising Industry has great developing prospects.With the establishment of marketing ecnomic system, Chinese Advertising Industry has undergone change .Athough the entering of foreign corporation and its merge of domestic corpora...学位：经济学硕士院系专业：经济学院经济研究所_产业经济学学号：2902007115039

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