From Octobet 1998 to January 1999,5 earthquakes ( M s≥5) occurred between Ninglang and Yanyuan counties (27°07′～27°12′N,100°40′～101°00′E area).They were situated in 140km southwest of the Xi...From Octobet 1998 to January 1999,5 earthquakes ( M s≥5) occurred between Ninglang and Yanyuan counties (27°07′～27°12′N,100°40′～101°00′E area).They were situated in 140km southwest of the Xichang.Among them,the largest one is M s 6 2 on November 19,1998.Based on small seismic data by the seismic remote sensing station of Xichang and the seismological station of Muli,and regional observation data,passing through careful observation and scientific analyses,we had made better forecasts before the earthquakes.That results obvious social benefits.By processing data of precursory earthquakes,such as,original observation data of total geomagnetic intensity from the station of Xichang,pressure capacitance stressometer and quartz horizaontal pendulum tiltmeter from the Xiaomiao station of Xichang,we summarized the sequence characteristics of the series earthquakes.The information about short\|term anomaly of gruond strain,total geomagnetic intensity and ground tilt before the earthquake is emphatically explained.展开更多
Based on hourly observation data from 2016 to 2019 and hourly automatic meteorological observation data from 2018 to 2019, we analyzed the annual, monthly and daily variation characteristics of fog days in Ninglang Ai...Based on hourly observation data from 2016 to 2019 and hourly automatic meteorological observation data from 2018 to 2019, we analyzed the annual, monthly and daily variation characteristics of fog days in Ninglang Airport, and diagnosed a case of summer fog. The results show that the average annual fog days in Ninglang Airport are 128 days and the annual characteristic of fog days is bimodal. Analyzed on fog cases in 2019, it was a summer fog process lasting more than 20 hours and visibility less than 500 m. The data from the automatic observational stations around Ninglang airport can describe the near-surface layer features of fog and illustrate the progress of fog. The meteorological elements of automatic observational stations changed suddenly 2 hours before fog, so the data of the automatic observational stations can be used to forscast fog.展开更多
On the basis of overview of the study area,by analyzing the dynamic change of farmland in Ninglang County,we can find that the farmland area in this county tended to decrease from 1996 to 2008.According to the investi...On the basis of overview of the study area,by analyzing the dynamic change of farmland in Ninglang County,we can find that the farmland area in this county tended to decrease from 1996 to 2008.According to the investigation data concerning land change provided by Bureau of Land and Resources in Ninglang County and socio-economic data provided by Bureau of Statistics in Ninglang County,we select 11 indices,such as total population,GDP,total output value of county and so on,coupled with SPSS statistical method,we adopt principal component analysis method to analyze driving force factors of farmland use change in the high and cold areas in Northwest Yunnan.The results show that the two factors of economic development and population growth are the dominant driving factors impacting farmland use change,and the policy factors,such as "returning farmland to forests",are also the important driving factors impacting Ninglang County.展开更多
文摘From Octobet 1998 to January 1999,5 earthquakes ( M s≥5) occurred between Ninglang and Yanyuan counties (27°07′～27°12′N,100°40′～101°00′E area).They were situated in 140km southwest of the Xichang.Among them,the largest one is M s 6 2 on November 19,1998.Based on small seismic data by the seismic remote sensing station of Xichang and the seismological station of Muli,and regional observation data,passing through careful observation and scientific analyses,we had made better forecasts before the earthquakes.That results obvious social benefits.By processing data of precursory earthquakes,such as,original observation data of total geomagnetic intensity from the station of Xichang,pressure capacitance stressometer and quartz horizaontal pendulum tiltmeter from the Xiaomiao station of Xichang,we summarized the sequence characteristics of the series earthquakes.The information about short\|term anomaly of gruond strain,total geomagnetic intensity and ground tilt before the earthquake is emphatically explained.
文摘Based on hourly observation data from 2016 to 2019 and hourly automatic meteorological observation data from 2018 to 2019, we analyzed the annual, monthly and daily variation characteristics of fog days in Ninglang Airport, and diagnosed a case of summer fog. The results show that the average annual fog days in Ninglang Airport are 128 days and the annual characteristic of fog days is bimodal. Analyzed on fog cases in 2019, it was a summer fog process lasting more than 20 hours and visibility less than 500 m. The data from the automatic observational stations around Ninglang airport can describe the near-surface layer features of fog and illustrate the progress of fog. The meteorological elements of automatic observational stations changed suddenly 2 hours before fog, so the data of the automatic observational stations can be used to forscast fog.
基金Supported by The National Natural Science Foundation of China(40861014)
文摘On the basis of overview of the study area,by analyzing the dynamic change of farmland in Ninglang County,we can find that the farmland area in this county tended to decrease from 1996 to 2008.According to the investigation data concerning land change provided by Bureau of Land and Resources in Ninglang County and socio-economic data provided by Bureau of Statistics in Ninglang County,we select 11 indices,such as total population,GDP,total output value of county and so on,coupled with SPSS statistical method,we adopt principal component analysis method to analyze driving force factors of farmland use change in the high and cold areas in Northwest Yunnan.The results show that the two factors of economic development and population growth are the dominant driving factors impacting farmland use change,and the policy factors,such as "returning farmland to forests",are also the important driving factors impacting Ninglang County.
文摘为挖掘影响宁蒗高原鸡(Gallus gallus domestica)胫发育的信号通路和关键基因,本研究采集第6周龄(6W组)、12周龄(12W组)和18周龄(18W组)健康母鸡跖骨生长板组织进行转录组测序,筛选差异表达基因(differentially expressedgene,DEGs)并随机选取6个基因进行实时荧光定量PCR(real time quantitative PCR,RT-qPCR)验证。通过KEGG通路分类、KEGG和GO富集分析、蛋白质-蛋白质相互作用(protein-protein interaction,PPI)网络可视化分析,以及cytoHubba插件中的最大权团中心度(maximal clique centrality,MCC)、最大邻域分量密度(density of maximum neighborhood component,DMNC)和最大邻域分量(maximum neighborhood component,MNC)等3种算法,筛选出参与宁蒗高原鸡胫发育的候选信号通路和关键基因。结果表明,12W vs 6W组得到66个DEGs,上调DEGs 15个,下调DEGs 51个;18W vs 6W组得到1814个DEGs,上调DEGs 768个,下调DEGs 1046个;18W vs 12W组得到2044个DEGs,上调DEGs 1049个,下调DEGs 995个。6个基因的mRNA相对表达量变化趋势与转录组测序结果一致,表明测序结果可信。KEGG通路分类筛选出312个与生长发育相关的DEGs,KEGG富集分析进一步得到105条信号通路(P<0.05),GO富集分析表明信号转导、ATP结合、细胞外间隙和细胞外区域等条目被显著富集(P<0.05)。综合KEGG和GO富集分析结果,得到15条信号通路和164个DEGs,PPI进一步分析筛选出可能参与宁蒗高原鸡胫发育的信号通路,根据表达量聚类和cytoHubba插件算法,得到调控胫发育的关键基因。本研究筛选到Wnt、TGF-β、PI3K-Aκt、ECM-受体相互作用、细胞周期、黏着斑和刺猬共7条信号通路,以及IHH、COL9A1、COL6A2、FGF7、HGF和WNT4等6个基因为影响宁蒗高原鸡胫发育的候选信号通路和关键基因;并且IHH、COL9A1和WNT4基因在胫发育前期发挥作用,FGF7、HGF和COL6A2基因主要在胫发育后期发挥作用,IHH基因为影响宁蒗高原鸡胫发育的核心基因。该研究为探讨宁蒗高原鸡胫发育的分子机制提供理论支撑。
