On the Construction of Communication Base Station from the Perspective of Public Goods -A Case Study of Zhangzhou City

近年来，公用移动通信快速发展，并有不断提速的迹象。来自4G-Reports提供的报告，4G网络正在变得越来越流行；数据显示，4G用户数目不仅已经突破了10亿，而且4G网络的数量也在增长，根据2016年第四季度的报告GlobalLTEPricingTariffTracker，4G用户总数已经达到了10.5亿，其中中国、美国和日本的用户占到近2/3。国内，随着2013年12月4日，工业和信息化部向三家通信运营商颁发4G牌照（TD-LTE），以及2014年工信部先后分两批次批准中国电信和中国联通分别在40个城市开展LTE-FDD和TD-LTE混合组网试，国内三大通信运营商的4G网络陆续投入商用，并且...Public Mobile Communication is currently one of the fastest growing, the most widely used and the most cutting-edge fields of communication. According to reports provided by 4G-Reports, 4G network is becoming increasingly popular. Just as the data displays, not only is the number of 4G users has hit one billion, the number of 4G networks is also growing. According to the report Global LTE Pricing ...学位：公共管理硕士院系专业：公共事务学院_公共管理硕士学号：1392013115040

大型高频谐振腔体内导电杆的制造方法

本发明主要涉及一种大型高频谐振腔体内导电杆的制造方法，其通过：在平台上将无氧铜半管与半方盒焊为一体；锡焊半管和半方盒内壁上的冷却盘管；焊接管套与封头并检漏；用夹环夹紧两半管和半方盒的焊合件，并将封头和管套焊合件套在上述拼合件的端头；用真空电子束焊点焊上述拼合件为一体，拆掉夹环，二次利用真空电子束焊，将两半管之间和两半管与封头之间拼缝焊透；在水冷下焊接两半盒和半盒与漂移管之间的拼接缝；焊接冷却盘管与管套间的拼接缝并检漏；精加工内导电杆；最后对外表面机械抛光。采用此新工艺制造出的大型高频谐振腔体内导电杆，表面电阻小、导电性能好、冷却效率高、稳定性佳、外形尺寸及形状误差小、真空指标好，改善和提高了整个高频谐振腔体性能

硝基苯衍生物结构与其淬灭聚(2,5-二戊氧基对亚苯基亚乙炔基)荧光效率的关系

The poly (2, 5-dipentyloxy-para-phenylene ethynylene) (P) was synthesized by Pd-catalyzed Sonogashira coupling reaction. Due to causing energy transfer between the nitrobenzene's quenchers and the polymer chains through the charge-transfer interaction, the fluorescence quenched properties of P varied obviously with the para-substituting group's structure in the nitrobenzene derivatives. The fluorescence quenching efficiency of quenchers improved with increasing of electron repulsion capability of the para-substituting group. The fluorescence quenching efficiency increased nonlinearly with the concentration of the quenchers and had, however, no relation with the quenching time

聚集诱导发光

聚集诱导发光(AIE)是唐本忠院士于2001年提出的一个科学概念,是指一类在溶液中不发光或者发光微弱的分子聚集后发光显著增强的现象。高效固态发光的AIE材料有望从根本上解决有机发光材料面临的聚集导致发光猝灭难题,具有重大的实际应用价值。从分子内旋转受限到分子内运动受限,从聚集诱导发光到聚集体科学,AIE领域已经取得了许多原创性的成果。在本综述中,我们从AIE材料的分类、机理、概念衍生、性能、应用和挑战等方面讨论了AIE领域最近取得的显著进展。希望本综述能激发更多关于分子聚集体的研究,并推动材料、化学和生物医学等学科的进一步交叉融合和更大发展。 Aggregation-induced emission (AIE), conceptually coined by Prof. Ben Zhong Tang in 2001, refers to a unique photophysical phenomenon non- or weakly emissive luminogens in dilute solutions emit intensely upon aggregation. AIE can solve the aggregation-caused quenching problem that traditional fluorophores are suffering from and hold great technological values for practical applications. The past 20 years have witnessed the rapid development of AIE research, from the restriction of intramolecular rotations to restriction of intramolecular motions, and from AIE to aggregate science, and many original results have been achieved. In this review, we summarize the advances in the field of AIE and its related areas. We specifically discuss the recent progress in AIE area, including material classification, mechanism, concept derivation, property, applications, and challenges. It is hoped that this review will inspire more research into the molecular aggregate level and make significant advances in materials, chemistry and biological sciences