Discovery of Four New Clusters in the Cygnus Cloud

We report the discovery of four new open clusters(named QC 1,QC 2,QC 3 and QC 4)in the direction of Cygnus Cloud and select their members based on five astrometric parameters(l,b,ω,μα*,μδ)of Gaia DR2.We also derive their astrophysical parameters for each new cluster.Structure parameters are generated by fitting the radial density distribution with a King’s profile.Using solar metallicity,we performed isochrone-fitting on their purified color-magnitude diagrams(CMDs)to derive the age of the clusters.The known cluster NGC 7062 in an adjacent area is chosen to verify our identification process.The estimated distance,reddening and age of NGC 7062 are in good agreement with the literature.     

长江流域雨情监测分析系统及其关键技术

介绍长江流域雨情监测分析系统的总体设计与关键技术实现。系统利用新一代气象通信系统及现代信息存储技术,实现了长江流域12个省(市)气象部门的703个国家级自动气象站、12000余个区域级自动站等资料的实时收集、监控、质量控制、存储及共享,满足了流域雨情资料实时监测、分析业务的高时效性、高质量性的应用需求;利用长江流域气象历史和实时资料,实现了长江流域及其子流域日、月、季、年等固定时间尺度及任意时段的雨情监测,并利用物理统计方法,提炼出长江流域不同年代不同季节的降水空间分布;采用基于Flex的WebGIS框架设计,实现了人机交互实时分析,满足了在多用户并发条件下高密度自动站数据的快速响应。该系统的建成为三峡梯调中心提供了一个集气象信息收集、整理、加工分析、基于WebGIS展示分析产品等功能为一体的业务应用系统,为长江三峡水利枢纽综合调度和上游水资源开发利用提供气象服务技术支撑。     

新疆霾天气监测的优化对策研究

针对新疆气象局普查全疆105个国家级气象站1951—2008年人工观测的霾天气历史记录时,发现新疆霾天气人工观测历史资料的统计数据出现明显不符合实际情况的异常现象,为探究出现这些异常现象的根本原因,研究人员分别采用历史资料统计法、问卷调查法、归纳分析法等多种方法,面向全疆观测员、预报员、业务管理人员等收集其对霾天气监测现状的看法和建议,进而归纳和总结出新疆霾天气监测业务中存在的主要问题,并针对存在的问题提出新疆霾天气监测的优化对策与措施,这些优化对策与措施已经应用于新疆气象观测站的日常霾天气业务中,且取得了一定的成效。     

兰州台FSQ自记水管倾斜仪与CZB-1型竖直摆倾斜仪的对比分析

将兰州台的FSQ与CZB-1仪的观测资料质量、变化趋势、潮汐响应函数及映震能力进行了对比分析,认为:FSQ的观测资料的质量比CZB-1要好,因CZB-1的资料存在漂移现象;在潮汐因子和相位滞后方面,FSQ比CZB-1反应灵敏;但CZB-1的映震能力比FSQ强。     

The conformity of HI galaxies in ALFALFA-SDSS sample

The conformity effect,indicating the evolution of galaxies is related to its surrounding neighbor galaxies as far as a few Mpc,is an interesting phenomenon in the modeling of galaxy and evolution.Here we study the conformity effect of HI galaxies in a matched galaxy sample between SDSS DR7 and ALFALFA surveys.By checking the probability difference for the detected H i galaxies as a function of distance around a normal or an H i galaxy,we find that this effect is significant out to 5 Mpc.It also shows a dependence on the stellar mass of galaxies,with the strength the strongest in the stellar mass range of 10¹⁰*/M_⊙<10^10.5.However,when the sample is confined to central galaxies in groups with virial radii smaller than 1 Mpc,the 1-halo conformity signal is still evident,while the 2-halo conformity signal is reduced to a very weak amplitude.Our results confirm the previous study in the optical band that the 2-halo term is possibly caused by the bias effect in the sample selection.Furthermore,we confirm the existence of the 1-halo conformity discovered in the optical and radio band in previous investigations.Our results provide another viewpoint on the conformity effect and hope to shed light on the co-evolution of the galaxies and their neighbors in the current galaxy formation models.     

Status Report on the International Conference for the Decade Memory of the Wenchuan Earthquake and the 4th International Conference on Continental Earthquake

正The International Conference for the Decade Memory of the Wenchuan Earthquake and the4th International Conference on Continental Earthquake will be held by China Earthquake Administration in Chengdu,Sichuan,China,on May 12-14,2018.On May 12,2008(Monday),at 14:08:04(Beijing time),an magnitude 8.0 earthquake     

Conflict between wild boars(Sus scrofa) and farmers:distribution,impacts,and suggestions for management of wild boars in the Three Gorges Reservoir Area

Economic losses caused by wild boars(Sus scrofa)continue to increase in the Three Gorges Reservoir Area.We selected 206 farmers in Wuqiaohe Basin as survey respondents using random stratified sampling.The distribution and impacts of wild boars were examined using a questionnaire survey and spatial analysis.The results showed that:(1)The density of farmer settlements is low and most peasants'households are located on the forest edge.Due to large-scale labor migration,a high proportion of farmland(25.85%)has been abandoned and an even higher proportion of farmland(40.48%)has been returned to forest.(2)The probability of wild boar damage to peasant households was 67.96%.Yields of corn and sweet potato decreased by 24.87%and 28.24%,respectively,with a total economic loss of approximately 2,590,100 RMB/yr in the Wuqiaohe basin.Sixty-five percent of the affected cultivatedlands were located within approximately 150 m of the forest edges.(3)The wild boar damage coefficient was significantly and negatively correlated with the distance between the peasants'household and the forest edge,the density of the settlements,and the area of cultivated land.The wild boar damage coefficient shows a significant positive correlation with the area of farmland returned to forest.(4)The damage activity caused by wild boars began to occur7-8 years ago,and the destruction has been more frequently and seriously observed in the last 4-5 years.(5)We make suggestions for wild boar control and management measures including developing a compensation policy.The compensation standard is related to the land area returning from farmland to forests and the actual cultivated land area.     

“机器代人”与城镇新增长模式 ——以广东省佛山市顺德区为例

为分析“机器代人”影响下的劳动密集型城镇新增长动力，文章构建了“机器代人”背景下城镇新增长模式的分析框架，以珠三角城镇增长的代表性地区--佛山市顺德区为案例，重点从技术、产业、人口和空间4个方面进行了探讨。研究发现：“机器代人”的推广应用极大地促进了地区的技术升级，企业和政府共同推动着地区技术升级路径从“二次创新”走向“一次创新”。技术升级对产业升级和人口变化产生重要的影响，一方面促使了家电等传统产业转型升级，传统产业对自动化设备的需求又带动了机器人产业的发展；另一方面削减了普通劳动力需求，催生新的就业机会，促使地区就业结构变化。产业升级和人口变化共同促进空间组织产生变化，创新要素在空间上扩散与集聚，区域形成“大集聚、小分散”的格局，边界地区成为区域新的增长核心。在“机器代人”影响下顺德区形成了技术、产业、人口和空间相互影响与促进的城镇新增长模式。     

Spatiotemporal variations of aridity index over the Belt and Road region under the 1.5°C and 2.0°C warming scenarios

Journal of Geographical Sciences - Aridity index reflects the exchanges of energy and water between the land surface and the atmosphere, and its variation can be used to forecast drought and flood...     

混浊水域多波束反向散射强度传播损失改正

为了改善现有的反向散射强度传播损失改正方法在混浊水域适应性较弱的问题,提出了混浊水域声传播损失计算模型。首先利用不同深度的海洋环境参数构建声波吸收系数剖面,然后基于声速,沿波束传播路径,对每个波束分层计算传播损失。实验分析表明,本方法传播损失改正效果最佳,其Spearman等级相关系数绝对值仅为0.04,远小于传统模型和TVG改正,大大减弱了混浊水域情况下多波束回波强度与传播距离的相关性,有效改善了多波束声呐图像的质量。