Effect of the Construction of Green Belts on the Attenuation of Traffic Noise along the Urban Trunk Roads in Xiamen City

通过对厦门市主干道绿化带种类结构调查以及噪声测定等,分析了厦门市主干道绿化带结构及其减噪效果。结果表明,厦门市主干道绿化带可分为4种结构:单一乔木型、乔木+疏灌木/绿篱型、乔木+密灌木型以及乔木+小乔木+灌木/绿篱型,带宽多在4~10M。厦门市主干道绿化带总体减噪能力为0.93~12.96db,绿化带对交通噪声超标治理率达70%。绿化带减噪能力y(db)与带宽X(M)呈显著的线性关系:y=1.2251X+0.2416(r2=0.8603);绿化带的附加衰减与总衰减亦呈显著正相关:y=0.4535X+0.2698(r2=0.9242),噪声的附加衰减主要受绿化带结构的影响,上述四种结构对噪声附加衰减平均值分别达0.93、2.25、4.43和6.72db。绿化带的宽度和结构均是影响其减噪效果的关键因素。Through site investigation and noise monitoring, the effects of the construction of green belts along the urban trunk roads in Xiamen Island on the attenuation of noise has been studied.The results show that the construction of green belts along the trunk road can be divided into four kinds of types as bellows: type I, single arbor; type II, arbor + shrub; type III, arbor + sub-arbor and type Ⅳ, arbor + sub-arbor + shrub.Their width varied among 4--10 m.The noise-reducing ability (y, dB) of the green belts varied from 0.93 to 12.96 dB with various belt widths (x, m), and can be expressed as following: y=1.2251x+0.2416.Meanwhile the additive attenuation of traffic noise (y, dB) presents a closely linear relationship with the total noise-reducing ability (x, dB) as following: y=0.4535x+0.2698 (R2=0.9242).Meanwhile, the additive attenuation of traffic noise is main affected by the constructions of green belts, which reached 0.93, 2.25, 4.43 and 6.72 dB, respectively for the above four kinds of construction types.It shows that the width and construction of green belts play the same important role to reduce the traffic noise

类泛素蛋白及其中文命名

泛素家族包括泛素及类泛素蛋白,约20种成员蛋白.近年来,泛素家族领域取得了迅猛发展,并已与生物学及医学研究的各个领域相互交叉.泛素家族介导的蛋白质降解和细胞自噬机制的发现分别于2004和2016年获得诺贝尔奖.但是,类泛素蛋白并没有统一规范的中文译名. 2018年4月9日在苏州召开的《泛素家族介导的蛋白质降解和细胞自噬》专著的编委会上,部分作者讨论了类泛素蛋白的中文命名问题,并在随后的\"泛素家族、自噬与疾病\"(Ubiquitinfamily,autophagy anddiseases)苏州会议上提出了类泛素蛋白中文翻译草案,此草案在参加该会议的国内学者及海外华人学者间取得了高度共识.冷泉港亚洲\"泛素家族、自噬与疾病\"苏州会议是由美国冷泉港实验室主办、两年一度、面向全球的英文会议.该会议在海内外华人学者中具有广泛影响,因此,参会华人学者的意见具有一定的代表性.本文介绍了10个类别的类泛素蛋白的中文命名,系统总结了它们的结构特点,并比较了参与各种类泛素化修饰的酶和它们的生物学功能.文章由45名从事该领域研究的专家合作撰写,其中包括中国工程院院士1名,相关学者4名,长江学者3名,国家杰出青年科学基金获得者18名和美国知名高校华人教授4名.他们绝大多数是参加编写即将由科学出版社出版的专著《泛素家族介导的蛋白质降解和细胞自噬》的专家

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^