In their ranges on east and south coasts of the Americas as well as their established invasions in the Adriatic and Baltic,blue crabs,Callinectes sapidus,inhabit estuaries,sounds and coastal oceans and are commerciall...In their ranges on east and south coasts of the Americas as well as their established invasions in the Adriatic and Baltic,blue crabs,Callinectes sapidus,inhabit estuaries,sounds and coastal oceans and are commercially and ecologically important.How crabs move in response to physical variables is important to management.We monitored life stages at canal control structures,assessed gender ratios with recreational crabbing,learned from crabbers,and studied movements of tagged crabs in a canal connecting Lake Mattamuskeet to the Pamlico sound.Juveniles enter the lake through two of 4 canals connecting to the sounds.Females migrate out through one canal.The lake standing population is about 70% male.Movements of 240 crabs in August 2012 and 102 crabs in October 2014 were quantified using RFID tags with co-located meteorological and oceanographic devices.Non-spawning females and males are nomadic.Crabs released in the canal move in response to changes in water depth and go with the flow,toward the Pamlico Sound(summer 76% and fall 78%).What crabbers describe as a fall migration appears to be concentration of crabs in warmer deeper canals and then southern movement with flow generated by strong north winds.To be effective,management strategies like migratory corridors require understanding of crab movements.展开更多
From the establishment of first meteorological theme park-Xiamen Huwei Mountain Meteorological Theme Park in 2009 to the end of September,2019,11 meteorological theme parks have been built in China.There are 12 meteor...From the establishment of first meteorological theme park-Xiamen Huwei Mountain Meteorological Theme Park in 2009 to the end of September,2019,11 meteorological theme parks have been built in China.There are 12 meteorological parks under construction and 10 shelved projects.China put forward the concept of meteorological theme park earlier in the world,and the construction of meteorological theme parks in China started from Xiamen Huwei Mountain Meteorological Park.The construction of meteorological theme parks in China has experienced the germination stage,initial stage,development stage and normative stage.Main construction experience contains:paying attention to top level design and overall planning,emphasizing leaders'attention and experts'participation,concerning multi-party linkage and coordination,and strengthening media momentum and extensive publicity.The main deficiencies are the lack of brand awareness,the diversity of names and weak folk identity.But seen from the perspective of development,the future prospect of meteorological theme park construction is very broad.In the future,the following countermeasures should be taken for the construction of meteorological theme parks in China:overall planning for approval,highlighting personality and characteristics,strengthening propaganda and grasping popularization of science,enhancing connotation and bringing benefits into play.It should combine meteorological science popularization with regional culture,use new media and other channels and ways to establish brand and expand influence,and build regional meteorological science popularization base.展开更多
利用安全扫描和光学字符识别技术实现气象档案数字化是对纸质气象历史档案拯救和开发利用的有效途径。该文在对数字化技术进行调研和试验的基础上,提出了历史纸质气象档案数字化的建设思路,针对气象档案记录内容的特点,对OCR(optical ch...利用安全扫描和光学字符识别技术实现气象档案数字化是对纸质气象历史档案拯救和开发利用的有效途径。该文在对数字化技术进行调研和试验的基础上,提出了历史纸质气象档案数字化的建设思路,针对气象档案记录内容的特点,对OCR(optical character recognition)手写体数字识别技术应用进行了分析,提出了气象档案OCR识别的解决策略,为业界的纸质气象档案数字化建设提供一种技术思路和有效的技术参考。展开更多
文摘In their ranges on east and south coasts of the Americas as well as their established invasions in the Adriatic and Baltic,blue crabs,Callinectes sapidus,inhabit estuaries,sounds and coastal oceans and are commercially and ecologically important.How crabs move in response to physical variables is important to management.We monitored life stages at canal control structures,assessed gender ratios with recreational crabbing,learned from crabbers,and studied movements of tagged crabs in a canal connecting Lake Mattamuskeet to the Pamlico sound.Juveniles enter the lake through two of 4 canals connecting to the sounds.Females migrate out through one canal.The lake standing population is about 70% male.Movements of 240 crabs in August 2012 and 102 crabs in October 2014 were quantified using RFID tags with co-located meteorological and oceanographic devices.Non-spawning females and males are nomadic.Crabs released in the canal move in response to changes in water depth and go with the flow,toward the Pamlico Sound(summer 76% and fall 78%).What crabbers describe as a fall migration appears to be concentration of crabs in warmer deeper canals and then southern movement with flow generated by strong north winds.To be effective,management strategies like migratory corridors require understanding of crab movements.
基金Supported by Meteorological Soft Science Research Project of China Meteorological Administration in 2019(2019ZZXM36)"Research on the History of Chinese Meteorological Science Popularization"in Pingdingshan University(PXY-BSQD-2018025).
文摘From the establishment of first meteorological theme park-Xiamen Huwei Mountain Meteorological Theme Park in 2009 to the end of September,2019,11 meteorological theme parks have been built in China.There are 12 meteorological parks under construction and 10 shelved projects.China put forward the concept of meteorological theme park earlier in the world,and the construction of meteorological theme parks in China started from Xiamen Huwei Mountain Meteorological Park.The construction of meteorological theme parks in China has experienced the germination stage,initial stage,development stage and normative stage.Main construction experience contains:paying attention to top level design and overall planning,emphasizing leaders'attention and experts'participation,concerning multi-party linkage and coordination,and strengthening media momentum and extensive publicity.The main deficiencies are the lack of brand awareness,the diversity of names and weak folk identity.But seen from the perspective of development,the future prospect of meteorological theme park construction is very broad.In the future,the following countermeasures should be taken for the construction of meteorological theme parks in China:overall planning for approval,highlighting personality and characteristics,strengthening propaganda and grasping popularization of science,enhancing connotation and bringing benefits into play.It should combine meteorological science popularization with regional culture,use new media and other channels and ways to establish brand and expand influence,and build regional meteorological science popularization base.
文摘利用安全扫描和光学字符识别技术实现气象档案数字化是对纸质气象历史档案拯救和开发利用的有效途径。该文在对数字化技术进行调研和试验的基础上,提出了历史纸质气象档案数字化的建设思路,针对气象档案记录内容的特点,对OCR(optical character recognition)手写体数字识别技术应用进行了分析,提出了气象档案OCR识别的解决策略,为业界的纸质气象档案数字化建设提供一种技术思路和有效的技术参考。
